TECHNICAL & SERVICE MANUAL PUMY...

TECHNICAL & SERVICE MANUAL

OUTDOOR UNIT

No. OCH612

HFCutilized

R410A

May 2016

Note:• This service manual describes

technical data of the outdoor units only.

<Outdoor unit>[Model Name]

Model name indication

PARTS CATALOG (OCB612)

PUMY-P36NKMU1

PUMY-P48NKMU1

PUMY-P36NKMU1-BS

PUMY-P48NKMU1-BS

Salt proof model

PUMY-P36NKMU1PUMY-P48NKMU1

PUMY-P36NKMU1-BSPUMY-P48NKMU1-BS

[Service Ref.]

CONTENTS 1. SAFETY PRECAUTION .................................... 2 2. OVERVIEW OF UNITS ...................................... 5 3. SPECIFICATIONS ........................................... 10 4. DATA .................................................................11 5. OUTLINES AND DIMENSIONS ...................... 23 6. WIRING DIAGRAM .......................................... 24 7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION ...... 25 8. TROUBLESHOOTING ..................................... 35 9. ELECTRICAL WIRING ...................................11010. REFRIGERANT PIPING TASKS ....................11511. DISASSEMBLY PROCEDURE .......................119

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

2

Cautions for units utilizing refrigerant R410A1-1. CAUTIONS RELATED TO NEW REFRIGERANT

Use new refrigerant pipes.

Store the piping indoors, and both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Avoid using thin pipes.

Charge refrigerant from liquid phase of gascylinder.If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22, etc.) is used, chlorine in refrige-rant can cause deterioration of refrigerant oil, etc.

Use a vacuum pump with a reverse flow check valve.Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.

Use the following tools specifically designed for use with R410A refrigerant.The following tools are necessary to use R410A refrigerant.

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that cancause deterioration of refrigerant oil or malfunction of com-pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera-nt will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptorSize adjustment gauge

Gauge manifold

Torque wrenchGas leak detectorCharge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterio-ration of refrigerant oil, etc.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of com-pressor.

If large amount of mineral oil enters, that can cause deterio-ration of refrigerant oil, etc.

Make sure that the inside and outside of refrige-rant piping is clean and it has no contaminantssuch as sulfur, oxides, dirt, shaving particles, etc,which are hazard to refrigerant cycle.In addition, use pipes with specified thickness.

The refrigerant oil applied to flare and flangeconnections must be ester oil, ether oil or alkylbenzene oil in a small amount.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact witha flame, poisonous gases will be released.

Use the specified refrigerant only.

Never use any refrigerant other than that specified.Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.Correct refrigerant is specified in the manuals and on the spec labels provided with our products.We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

1 SAFETY PRECAUTION

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Electronic weighing scale

Unit

[3] Service tools Use the below service tools as exclusive tools for R410A refrigerant.

[1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.

[2] Additional refrigerant charge When charging directly from cylinder (1) Check that cylinder for R410A on the market is a syphon type. (2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the performance of the unit.(1) Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.(2) If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by rainwater. (If a sunshade is installed, rainwater may not clean the panel.)(3) To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water collecting in the base of the outdoor unit could cause rust.(4) If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.(5) If the unit is damaged during installation or maintenance, be sure to repair it.(6) Be sure to check the condition of the unit regularly.(7) Be sure to install the unit in a location with good drainage.

1-2. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL

No. Tool name Specifications1 Gauge manifold · Only for R410A

· Use the existing fitting specifications. (UNF1/2)· Use high-tension side pressure of 768.7 PSI [5.3 MPa.G] or over.

2 Charge hose · Only for R410A· Use pressure performance of 738.2 PSI [5.09MPa.G] or over.

3 Electronic scale —

4 Gas leak detector · Use the detector for R134a, R407C or R410A.5 Adaptor for reverse flow check · Attach on vacuum pump.6 Refrigerant charge base —

7 Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)· Cylinder with syphon

8 Refrigerant recovery equipment —

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Cautions for refrigerant piping workNew refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.1 Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 7/256 in [0.7 mm] or below.)

2 Dimensions of flare cutting and flare nutThe component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A has been specified sepa-rately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also has partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes. Use torque wrench corresponding to each dimension.

3 Tools for R410A (The following table shows whether conventional tools can be used or not.)

1/43/81/25/83/4

6.359.5212.7015.8819.05

1/32 [0.8] 1/32 [0.8] 1/32 [0.8] 5/128 [1.0]

—

1/32 [0.8] 1/32 [0.8] 1/32 [0.8]5/128 [1.0]5/128 [1.0]

Nominaldimensions (in)

Diagram below: Piping diameter and thicknessOutside

diameter (mm)Thickness : in [mm]

R410A R22

1/43/81/25/83/4

6.359.5212.7015.8819.05

11/32-23/64 [ 9.1]1/2-33/64 [13.2]41/64-21/32 [16.6]49/64-25/32 [19.7] —

9.013.016.219.423.3


Flare cutting dimensionsOutside

diameter (mm)Dimension A ( )+0

-0.4

Unit : in [mm]

R410A R221/43/81/25/83/4

6.359.5212.7015.8819.05

43/64 [17.0] 7/8 [22.0] 1-3/64 [26.0] 1-9/64 [29.0]

17.022.024.027.036.0


Flare nut dimensionsOutside

diameter (mm)Dimension B

Unit: in [mm]

R410A R22

—

Gauge manifoldCharge hoseGas leak detectorRefrigerant recovery equipmentRefrigerant cylinderApplied oil

Safety charger

Charge valve

Vacuum pump

Flare tool

BenderPipe cutterWelder and nitrogen gas cylinderRefrigerant charging scaleVacuum gauge or thermis-tor vacuum gauge and vacuum valveCharging cylinder

Air purge, refrigerant chargeand operation checkGas leak checkRefrigerant recoveryRefrigerant chargeApply to flared section

Prevent compressor malfunction when charging refrigerant by spraying liquid refrigerantPrevent gas from blowing out when detaching charge hoseVacuum drying and airpurge

Flaring work of piping

Bend the pipesCut the pipesWeld the pipesRefrigerant chargeCheck the degree of vacuum. (Vacuum valve prevents back flow of oil and refri-gerant to thermistor vacuum gauge)Refrigerant charge

Tool exclusive for R410ATool exclusive for R410ATool for HFC refrigerantTool exclusive for R410ATool exclusive for R410AEster oil, ether oil andalkylbenzene oil (minimum amount)Tool exclusive for R410A

Tool exclusive for R410A

Tools for other refrigerants can be used if equipped with adop-ter for reverse flow checkTools for other refrigerants can be used by adjusting flaring dimensionTools for other refrigerants can be usedTools for other refrigerants can be usedTools for other refrigerants can be usedTools for other refrigerants can be usedTools for other refrigerants can be used

Tool exclusive for R410A

Tools and materials Use R410A tools Can R22 tools be used?

(Usable if equipped with adopter for reverse flow) (Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil, ether oil: Alkylbenzene oil: minimum amount

(Usable if equipped with adopter for reverse flow) (Usable by adjusting flaring dimension)

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.) : Tools for other refrigerants can be used under certain conditions.: Tools for other refrigerants can be used.

Dimension A

Dimension B

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2 OVERVIEW OF UNITS

2-1. Auxiliary HEATING ON/OFF CONTROL SET-UP

(1) Auxiliary heating operation controls another heat source that depends on the main system's operations,which means the interlock operation shown in "b)" will be possible.

a)

b) Different Indoor unit applications that can be applied:

(2) Outdoor unit DIPSW5-4 for auxiliary heating control:Set DIPSW5-4 when power is turned off at unit.

OFF: Disable auxiliary Heating Function (Initial setting)ON : Enable auxiliary Heating Function

Indoor unit must be R410A UL model for this function to operate.

(3) Determine required indoor fans speed during defrost mode:To set the fan speed, see the chapter referring to heater control in the indoor unit’s Technical & Service Manual.

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When the set temperature ranges overlap, the previously set pattern (1,2 or 3) has a priority.The stage 1 has the highest priority, 2 the second and then 3.

b) Based on above chart listed the sequence of operation on "On ambient decrease" Stage 1 :(TH7 = > 10:) : the outdoor unit runs in HP mode. Stage 2 :(TH7 = 10: to -25:) : the outdoor unit runs in HP mode with auxiliary heating. Stage 3 :(TH7 = < -25:) : Auxiliary heating only (Outdoor unit is OFF).

c) Based on above chart listed the sequence of operation on "On ambient increase" Stage 3 :(TH7 = < 0:) : Auxiliary heating only (Outdoor unit is OFF). Stage 2 :(TH7 = > 0: to 20:) : Auxiliary heating with outdoor unit in HP mode. Stage 1 :(TH7 = > 20:) : Outdoor unit in HP mode only.

(4) Determine fan airflow setting during indoor thermo-OFF conditions:a) These settings are done within Indoor DIPSW1-7 and DIPSW1-8, see chart below for options.b) Recommended SW1-7 OFF and SW1-8 ON will determine airflow based on "Setting on the remote controller".

Fan speed setting

Fan speed setting

OFF ON

SW1-7 SW1-8OFF OFF Very low

ON OFF Low

OFF ONSetting on

remote controller

ON ON Stopped

Auxiliary heating signal

Thermo condition

(5) Setting outdoor unit and auxiliary heat switch over temperatures.When the DIPSW 5-4 is set to "ON", the outdoor unit and the contact output operates as shown below.

a) Outdoor default setting and operations are shown below:

Stage 1Amb. decreasing - Outdoor unit HP operationAmb. increasing - Defrost : Heater contact ON signal

- Other than defrost : Contact OFF

Stage 2- Outdoor unit HP operation- Heater contact ON signal

Stage 3 - Outdoor unit OFF (Standby)- Heater contact ON signal

TH7 = Outdoor temperature a-25-C[-13-F]

b0-C

[32-F]

c10-C[50-F]

d20-C[68-F]

Setting on remote

controller

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(6) Locally procured wiringA basic connection method is shown.(i.e. interlocked operation with the electric heater with the fan speed setting on high)

Recommended circuit

CN24

CN22X+

X

Remote control Board Relay circuit AdapterIndoor unit

control boardOutdoor unit

control board

Ele

ctric

Hea

ter

pow

er s

ourc

e

ElectricHeater

Red 1

White 2

Dip switchSW5-4 "ON"

Preparations in the field Maximum cable lengthis 10 m (32ft)

Red 1

Red 2

Yello

wG

reen

FS1

FS2FS1

FS2

RS

RS

CN24

H288H

H188H

26H88H

1-phase powersupply208V, 230V/60Hz

Control board

FS1, 2 ----- Thermal fuseH1, H2 ----- Heater26H --------- Overheat protection

thermostat88H --------- Electromagnetic contactor

Wiring diagram

For relay X use the specifications given below operation coilRated voltage : 12VDCPower consumption : 0.9W or less

*Use the diode that is recommended by the relay manufacturer at both ends of the relay coil.The length of the electrical wiring for the PAC-YU24HT is 2 meters (6-1/2 ft)To extend this length, use sheathed 2-core cable.

Control cable type : CVV, CVS, CPEV or equivalent.Cable size : 0.5 mm2 to 1.25 mm2 (AWG22 to AWG16)Do not extend the cable more than 10 meters (32ft).

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2-2. UNIT CONSTRUCTION

Branching pipecomponents

Branch header (2 branches)



CMY-Y62-G-E CMY-Y64-G-E CMY-Y68-G-E

Decorative panel

Model

Capacity

Cassette Ceiling Ceiling Concealed

Wall Mounted

CeilingSuspended

Floor standing Multi-posit ion air handling unit4-way fl ow 1-way fl ow Exposed Concealed

PLFY-EP PLFY-P PLFY-P PMFY-P PEFY-P PKFY-P PCFY-P PFFY-P PFFY-P PVFY-PNEMU-E NEMU-E NCMU-E NBMU-E NMAU NMSU-E NHMU-E NBMU-E NHMU-E NKMU-E NKMU-E NEMU-E NRMU-E NAMU-E

06 – – – – – – – –

08 – – – – – –

12 – – – –

15 – – –

18 – – – – –

24 – – – –

27 – – – – – – – – – – – –

30 – – – – – – –

36 – – – – – – – –

48 – – – – – – – – –

54 – – – – – – – – – – –

Outdoor unit 4HP 5HPPUMY-P36NKMU1(-BS) PUMY-P48NKMU1(-BS)

Applicableindoor unit

Capacity Type 06 to Type 36 Type 06 to Type 54Number of units 1 to 7 unit 1 to 10 unit

Total system wide capacity 50 to 130% of outdoor unit capacity

Remotecontroller

Name M-NET remote controller MA remote controller

Model number PAR-F27MEA-EPAR-U01MEDU PAR-21MAA, PAR-30/31/32MAA

Functions

• A handy remote controller for use in conjunction with the Melans centralized management system.• Addresses must be set.

• Addresses setting is not necessary.

–: Not connectable: Connectable

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2-3. UNIT SPECIFICATIONS

(2) Method for identifying MULTI-S model

(1) Outdoor Unit

Indoor unit < When using Model 30 > Outdoor unit <When using model 48 >

P L F Y - P 30 N E M U - E PU M Y - P 48 N K M U 1 - BS

PAC type

Frequencyconversioncontroller

RefrigerantR410A/R22commonness

RefrigerantR410A

NEW frequency converterone-to-many air conditioners(flexible design type)

Indicates equivalentto Cooling capacity

Indicates equivalentto Cooling capacity

Power supplyN: 208/230 V AC 60 Hz

Power supplyN: 208/230 V AC 60 Hz

L : Ceiling cassetteK : Wall-mounted typeE : Hidden skylight typeC : Ceiling suspended typeM : Ceiling cassette typeF : Floor standing type

Outdoor unitmodel type

Sub-number Sub-number

Unit model type

M-NET control

UL modelM-NET controlFrequency

conversioncontroller

Outdoor unit

MULTI-S Salt proof type

UL model

Cooling/Heating capacity indicates the maximum value at operation under the following condition. Cooling Indoor D.B. 80°F/W.B. 67°F: [D.B. 26.7°C/W.B. 19.4°C]

Outdoor D.B. 95°F/W.B. 75°F: [D.B. 35°C/W.B. 23.9°C]Heating Indoor D.B. 70°F/W.B. 60°F: [D.B. 21.1°C/W.B. 15.6°C]

Outdoor D.B. 47°F/W.B. 43°F: [D.B. 8.3°C/W.B. 6.1°C]

(3) Operating temperature range

Notes: D.B. : Dry Bulb Temperature W.B. : Wet Bulb Temperature *1 50 to 115°F [10 to 46°C] D.B. : When connecting PKFY-P06NBMU, PKFY-P08NHMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit. *2 5 to 115°F [−15 to 46°C] D.B.: When using an optional air protect guide [PAC-SH95AG-E]. However, this condition does not apply to the indoor units listed in *1.

Service Ref. PUMY-P36NKMU1(-BS) PUMY-P48NKMU1(-BS)Capacity Cooling (kBTU/h) 36.0 48.0

Heating (kBTU/h) 42.0 54.0Compressor (kW) 2.8 3.3

Cooling HeatingIndoor-side intake air temperature W.B. 59 to 75°F [15 to 24°C] D.B. 59 to 81°F [15 to 27°C]Outdoor-side intake air temperature D.B. 23 to 115°F [−5 to 46°C]*1,*2 W.B. −13 to 59°F [−25 to 15°C]

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3 SPECIFICATIONSModel PUMY-P36NKMU1(-BS) PUMY-P48NKMU1(-BS)

Power source 208/230 V AC 60 HzCooling(Nominal)

Capacity BTU/h*1 36,000 48,000Power input kW 2,445 3,690Current input 208V / 230V A 11.9 / 10.8 18.0 / 16.3EER kBTU/h 14.7 13.0

Temp. range ofcooling

Indoor temp. W.B. 59 to 75°F [15 to 24°C] Outdoor temp. D.B. 23 to 115°F [−5 to 46°C]*3*4

Heating(Nominal)

Capacity BTU/h*2 42,000 54,000Power input kW 3,100 4,085Current input 208V / 230V A 15.1 / 13.7 19.9 / 18.0COP W/W 3.97 3.87

Breaker size 40AMax. fuse size 44AMin. circuit ampacity 31ATemp. range ofheating

Indoor temp. D.B. 59 to 81°F [15 to 27°C]Outdoor temp. W.B. −13 to 59°F [−25 to 15°C]

Indoor unitconnectable

Total capacity 50 to 130% of outdoor unit capacityModel/ Quantity Citymulti 06 - 36 / 7 06 - 54 / 10

Sound pressure level (measured in anechoic room)

dB <A> 49 / 53 51 / 54

Refrigerantpiping diameter

Liquid pipe in (mm) 3/8 (9.52)Gas pipe in (mm) 5/8 (15.88)

FAN Type x Quantity Propeller Fan x 2Air fl ow rate m³/min 110

L/s 1,834cfm 3,885

Control, Driving mechanism DC controlMotor output kW 0.074+0.074External static press. 0

Compressor Type x Quantity Scroll hermetic compressor x 1Manufacture Mitsubishi Electric CorporationStarting method InverterCapacity control % Cooling 29 to 100

Heating 24 to 100Cooling 23 to 100Heating 22 to 100

Motor output kW 2.8 3.3Case heater kW 0Lubricant FV50S (2.3 liter)

External fi nish Galvanized Steel SheetMunsell No. 3Y 7.8/1.1

External dimension HxWxD mm 1,338 x 1,050 x 330(+25)in 52-11/16 x 41-11/ 32 x 13 (+1)

Protection devices

High pressure protection High pressure Switch, High pressure SensorInverter circuit (COMP./FAN) Overcurrent detection, Overheat detection(Heat sink thermistor)Compressor Compressor thermistor, Overcurrent detectionFan motor Overheating, Voltage protection

Refrigerant Type x original charge R410A 4.8kgControl Electronic expansion valve

Net weight kg (lb) 122 (269)Heat exchanger Cross Fin and Copper tubeHIC circuit (HIC: Heat Inter-Changer) HIC circuitDefrosting method Reversed refrigerant circuitDrawing External BK01V261

Wiring BH78B813Standard attachment

Document Installation ManualAccessory Grounded lead wire x2, conduit plate

Optional parts Joint: CMY-Y62-G-EHeader: CMY-Y64/68-G-E

Remarks*1 Nominal cooling conditions *2 Nominal heating conditions *3 50 to 115°F [10 to 46°C] D.B. :

When connecting PKFY-P06NBMU, PKFY-P08NHMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMU type indoor unit.

Indoor : 80.0°F D.B/67.0°F W.B. [26.7°C D.B. /19.4°C W.B. ] 70.0°F D.B./60.0°F W.B. [21.1°C D.B./15.6°C W.B.]Outdoor : 95.0°F D.B./75.0°F W.B. [35.0°C D.B. /23.9°C W.B.] 47.0°F D.B./43.0°F W.B. [8.3°C D.B./6.1°C W.B.]

Pipe length : 25 ft [7.6 m] 25 ft [7.6 m]Level difference : 0 ft [0 m] 0 ft [0 m]

Note : Due to continuing improvement, above specifi cations may be subject to change without notice.

*4 5 to 115°F [−15 to 46°C] D.B.: When using an optional air protect guide [PAC-SH95AG-E]. However, this condition does not apply to the indoor units listed in *3.

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4

Capacity of indoor unit

Model 08Model Number for indoor unit

Model Capacity 8.0

Model 06

6.0

Model 12

12.0

Model 15

15.0

Model 18

18.0

Model 24

24.0

Model 27

27.0

Model 30

30.0

Model 36

36.0

Model 48

48.0

Model 54

54.0

DATA

0 50 100 150 200 250 300 350 400 450 500 550 6000.50

0.55

0.60

0.65

0.70

0.75

0.80

0.85

0.90

0.95

1.00

<Cooling>Design Condition

Outdoor Design Dry Bulb Temperature 98.6ºF (37.0ºC)Total Cooling Load 30.3 kBTU/hRoom1

Indoor Design Dry Bulb Temperature 80.6ºF (27.0ºC)Indoor Design Wet Bulb Temperature 68.0ºF (20.0ºC)Cooling Load 13.6 kBTU/h

Room2Indoor Design Dry Bulb Temperature 75.2ºF (24.0ºC)Indoor Design Wet Bulb Temperature 66.2ºF (19.0ºC)Cooling Load 16.7 kBTU/h

<Other>Indoor/Outdoor Equivalent Piping Length 250 ft

1. Cooling Calculation(1) Temporary Selection of Indoor Units

Room1PEFY-P15 15.0 kBTU/h (Rated)

Room2PEFY-P18 18.0 kBTU/h (Rated)

(2) Total Indoor Units CapacityP15+ P18 = P33

(3) Selection of Outdoor UnitThe P36 outdoor unit is selected as total indoor units capacity is P33PUMY-P36 36.0 kBTU/h

(4) Total Indoor Units Capacity Correction CalculationRoom1

Indoor Design Wet Bulb Temperature Correction (68.0ºF) 1.02 (Refer to Figure 1)

Figure 1 Indoor unit temperature correction To be used to correct indoor unit only

Figure 2 Outdoor unit temperature correction To be used to correct outdoor unit only

Figure 3 Correction of refrigerant piping length

Room2Indoor Design Wet Bulb Temperature Correction (66.2ºF) 0.95 (Refer to Figure 1)

CT

= 32.4 kBTU/h(5) Outdoor Unit Correction Calculation

Outdoor Design Dry Bulb Temperature Correction (98.6ºF) 0.98 (Refer to Figure 2)Piping Length Correction (250 ft) 0.93 (Refer to Figure 3)Total Outdoor Unit Capacity (CTo)

Total Indoor Units Capacity (CTi)

CTo =

= 32.8 kBTU/h(6) Determination of Maximum System Capacity

Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)CTi = 32.4 < CTo = 32.8, thus, select CTi. CTx = CTi = 32.4 kBTU/h

(7) Comparison with Essential LoadAgainst the essential load 30.3 kBTU/h, the maximum system capacity is 32.4 kBTU/h: Proper outdoor units have been selected.

(8) Calculation of Maximum Indoor Unit Capacity of Each RoomCTx = CTi, thus, calculate by the calculation below

Room1Indoor Unit Rating Indoor Design Temperature Correction

= 15.3 kBTU/h OK: fulfills the load 13.6 kBTU/hRoom2

Indoor Unit Rating Indoor Design Temperature Correction

= 17.1 kBTU/h OK: fulfills the load 16.7 kBTU/hGo on to the heating trial calculation since the selected units fulfill the cooling loads of Room 1, 2.

IndoorTemperature

15 16 17 18 19 20 21 22 23 2459 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2

0.4

0.6

0.8

1.0

1.2

Rat

io o

f coo

ling

capa

city

Indoor Temperature

[°CW.B.] [°FW.B.]

-15 -10 -5 0 5 10 15 20 25 30 35 40 455 14 23 32 41 50 59 68 77 86 95 104 113

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

Rat

io o

f coo

ling

capa

city

Outdoor Temperature

[°C D.B.] [°F W.B.]

19.4°C (67.0°F) W.B

18 [kBTU/h]

27 [kBTU/h]

36 [kBTU/h]

Cap

acity

ratio

Piping equivalent length (m)

Total capacity of indoor unit

46.8 [kBTU/h]

4-1. SELECTION OF COOLING/HEATING UNITS

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Capacity of indoor unit

Model 08Model Number for indoor unit

Model Capacity 9.0

Model 06

6.7

Model 12

13.5

Model 15

17.0

Model 18

20.0

Model 24

27.0

Model 27

30.0

Model 30

34.0

Model 36

40.0

Model 48

54.0

Model 54

60.0

0 50 100 150 200 250 300 350 400 450 500 550 6000.70

0.75

0.80

0.85

0.90

0.95

1.00

<Heating>

Design ConditionOutdoor Design Wet Bulb Temperature 35.6ºF (2.0ºC)Total Heating Load 34.4 kBTU/hRoom1

Indoor Design Dry Bulb Temperature 69.8ºF (21.0ºC)Heating Load 16.3 kBTU/h

Room2Indoor Design Dry Bulb Temperature 73.4ºF (23.0ºC)Heating Load 18.1 kBTU/h

<Other>Indoor/Outdoor Equivalent Piping Length 328 ft

2. Heating Calculation(1) Temporary Selection of Indoor Units

Room1PEFY-P15 17.0 kBUT/h (Rated)

20.0 kBUT/h (Rated)Room2

PEFY-P18

(2) Total Indoor Units CapacityP15 + P18 = P33

(3) Selection of Outdoor UnitThe P36 outdoor unit is selected as total indoor units capacity is P33PUMY-P36 42.0 kBUT/h

(4) Total Indoor Units Capacity Correction CalculationRoom1

Indoor Design Dry Bulb Temperature Correction (69.8ºF) 1.00 (Refer to Figure 4)Room2

Indoor Design Dry Bulb Temperature Correction (73.4ºF) 0.92 (Refer to Figure 4)

CT

= 35.4 kBTU/h

(5) Outdoor Unit Correction CalculationOutdoor Design Wet Bulb Temperature Correction (35.6ºF) 1.0 (Refer to Figure 5)Piping Length Correction (328 ft)Defrost Correction

0.94 (Refer to Figure 6)0.89 (Refer to Table 1)

Total Outdoor Unit Capacity (CTo)

Total Indoor Units Capacity (CTi)

CTo = Outdoor Unit Rating Outdoor Design Temperature Correction Piping Length Correction Defrost Correction

= 35.1 kBTU/h

(6) Determination of Maximum System CapacityComparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)

CTi = 35.4 > CTo = 35.1, thus, select CTo. CTx = CTo = 35.1 kBTU/h

(7) Comparison with Essential LoadAgainst the essential load 34.4 kBTU/h, the maximum system capacity is 35.1 kBTU/h: Proper outdoor units have been selected.

(8) Calculation of Maximum Indoor Unit Capacity of Each RoomCTx = CTo, thus, calculate by the calculation below

Room1

+= 16.9 kBTU/h OK: fulfills the load 16.3 kBTU/h

Room2

= += 18.2 kBTU/h OK: fulfills the load 18.1 kBTU/h

Completed selecting units since the selected units fulfill the heating loads of Room 1, 2.

Figure 4 Indoor unit temperature correction To be used to correct indoor unit only

Figure 5 Outdoor unit temperature correction To be used to correct outdoor unit only

Figure 6 Correction of refrigerant piping length

0 5 10 150.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Rat

io o

f hea

ting

capa

city

Outdoor Temperature [°C W.B.]

21.1°C (70.0°F) D.B

15 16 17 18 19 20 21 22 23 24 25 26 2759 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Rat

io o

f hea

ting

capa

city

Indoor Temperature

[°C D.B.] [°F W.B.]

IndoorTemperature

Cap

acity

ratio

Piping equivalent length (m)


Table 1 Table of correction factor at frost and defrost

Outdoor Intake temperature <W.B.°F (°C)> 43(6) 37(4) 36(2) 32(0) 28(−2) 25(−4) 21(−6) 18(−8) 14(−10) 5(−15) −4(−20) −13(−25)Correction factor 1.0 0.98 0.89 0.88 0.89 0.9 0.95 0.95 0.95 0.95 0.95 0.95

OCH612

13

4-2. CORRECTING BY TEMPERATURE

15 16 17 18 19 20 21 22 23 2459 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2

0.4

0.6

0.8

1.0

1.2

Rat

io o

f coo

ling

capa

city

Indoor Temperature

[°CW.B.] [°FW.B.]

-15 -10 -5 0 5 10 15 20 25 30 35 40 455 14 23 32 41 50 59 68 77 86 95 104 113

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

Rat

io o

f coo

ling

capa

city

Outdoor Temperature

19.4°C (67.0°F) W.B.

[°C W.B.] [°F W.B.]

-15 -10 -5 0 5 10 15 20 25 30 35 40 455 14 23 32 41 50 59 68 77 86 95 104 113

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Rat

io o

f pow

er in

put

Outdoor Temperature

[°C W.B.] [°F W.B.]

20.0°C (68.0°F) W.B.20.0°C (68.0°F) W.B. 24.0°C (75.2°F) W.B.24.0°C (75.2°F) W.B. 22.0°C (71.6°F) W.B.22.0°C (71.6°F) W.B.

19.4°C (67.0°F) W.B.19.4°C (67.0°F) W.B.18.0°C (64.4°F) W.B.18.0°C (64.4°F) W.B.

16.0°C (60.8°F) W.B.16.0°C (60.8°F) W.B.

CITY MULTI could have varied capacity at different designing temperature. Using the nominal cooling/heating capacity value and the ratio below, the capacity can be observed at various temperature.

PUMYP36 P48

Nominal cooling capacity BTU/h 36,000 48,000Input kW 2.445 3.69

Figure 7 Indoor unit temperature correctionTo be used to correct indoor unit capacity only

Figure 8 Outdoor unit temperature correctionTo be used to correct outdoor unit capacity only

<Cooling>

Indoor Temperature

Indoor Temperature

OCH612

14

<Heating>

15 16 17 18 19 20 21 22 23 24 25 26 2759 60.8 62.6 64.4 66.2 68 69.8 71.6 73.4 75.2 77 78.8 80.6

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Rat

io o

f hea

ting

capa

city

Indoor Temperature

[°C W.B.] [°F W.B.]

-25 -20 -15 -10 -5 0 5 10 15-4 5 14 23 3 41 50 5

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

Rat

io o

f hea

ting

capa

city

Outdoor Temperature

[°C W.B.][°F W.B.]

21.1°C (70.0°F) D.B.

-25 -20 -15 -10 -5 0 5 10 155 14 23 3 41 5 5

0.0

0.2

0.4

1.0

0.6

0.8

1.2

1.4

Rat

io o

f hea

ting

capa

city

Outdoor Temperature

[°C W.B.][°F W.B.]

21.1°C (70.0°F) D.B.

16.0°C (60.8°F) D.B.

26.0°C (78.8°F) D.B.

Figure 9 Indoor unit temperature correctionTo be used to correct indoor unit capacity only

Figure 10 Outdoor unit temperature correctionTo be used to correct outdoor unit capacity only

PUMYP36 P48

Nominal heating capacity BTU/h 42,000 54,000Input kW 3.10 4.085

Indoor Temperature

Indoor Temperature

OCH612

15

4-3. STANDARD OPERATION DATA (REFERENCE DATA)Operation PUMY-P36NKMU1(-BS) PUMY-P48NKMU1(-BS)Operatingconditions

Ambient temperature

Indoor

DB/WB

80°F/67°F[26.7°C / 19.4°C]

70°F/60°F[21.1°C/15.6°C]

80°F/67°F[26.7°C/19.4°C]

70°F/60°F[21.1°C/15.6°C]

Outdoor 95°F/75°F[35.0°C/23.9°C]

47°F / 43°F[8.3°C/6.1°C]

95°F/ 75°F[35.0°C / 23.9°C]

47°F/43°F[8.3°C/6.1°C]

Indoor unit No. of connected unitsUnit

3 4No. of units in operation 3 4Model ― 12×3 12 × 4

Piping Main pipeFt (m)

9.84 (3) 9.84 (3)Branch pipe 14.76 (4.5) 14.76 (4.5)Total pipe length 54.13 (16.5) 68.90 (21)

Fan speed ― Hi HiAmount of refrigerant LBS. OZ. (kg) 17 LBS. (7.7) 17 LBS. 3 OZ. (7.8)

Outdoor unit

Electric current A 10.8 13.7 16.3 18.0 Voltage V 230 230Compressor frequency Hz 47 66 64 80

LEV opening

Indoor unit Pulse 268 438 247 313

Pressure High pressure/Low pressure psi[MPa] 370/116 [2.55/0.80] 406/104 [2.80/0.72] 419/112 [2.89/0.77] 409/97 [2.82/0.67]Temp. of eachsection

Outdoor unit

Discharge

°F[°C]

139.1 [59.5] 145.8 [63.2] 154.2 [67.9] 149.2 [65.1]Heat exchanger outlet 101.3 [38.5] 34.3 [1.3] 99.7[37.6] 32.2 [0.1]Accumulator inlet 49.5 [9.7] 33.4 [0.8] 47.1 [8.4] 31.3 [-0.4]Compressor inlet 45.3 [7.4] 33.6 [0.9] 42.4 [5.8] 32.7 [0.4]

Indoor unit Lev inlet 83.7 [28.7] 100.2 [37.9] 71.1 [21.7] 98.8 [37.1]Heat exchanger inlet 49.6 [9.8] 132.3 [55.7] 47.5 [8.6] 134.6 [57.0]

OCH612

16

4-4. STANDARD CAPACITY DIAGRAM Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on "4-1-1. Method for obtaining system cooling and heating capacity".

0.0 10.0 20.0 30.0 40.0 50.00.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

0.0 10.0 20.0 30.0 40.0 50.00.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0.0 10.0 20.0 30.0 40.0 50.00.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

208 V230 V

Cap

acity

(kB

TU/h

)

Total capacity of indoor units(kBTU/h)

Inpu

t(kW

)


Cur

rent

(A)


4-4-1. PUMY-P36NKMU1(-BS) <cooling>

OCH612

17

0.0 10.0 20.0 30.0 40.0 50.00.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

0.0 10.0 20.0 30.0 40.0 50.00.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0.0 10.0 20.0 30.0 40.0 50.00.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

208 V230 V

Cap

acity

(kB

TU/h

)


Inpu

t(kW

)


Cur

rent

(A)


4-4-2. PUMY-P36NKMU1(-BS) <heating>

OCH612

18

4-4-3. PUMY-P48NKMU1(-BS) <cooling>

Before calculating the sum of total capacity of indoor units, please convert the value into the kW model capacity following the formula on "4-1-1. Method for obtaining system cooling and heating capacity".

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.00.0

10.0

20.0

30.0

40.0

50.0

60.0

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.00.0

1.0

2.0

3.0

4.0

5.0

6.0

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.00.0

5.0

10.0

15.0

20.0

25.0

30.0

208 V230 V

Cap

acity

(kB

TU/h

)


Inpu

t(kW

)


Cur

rent

(A)


OCH612

19

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.00.0

10.0

20.0

30.0

40.0

50.0

60.0

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.00.0

1.0

2.0

3.0

4.0

5.0

6.0

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.00.0

5.0

10.0

15.0

20.0

25.0

30.0

208 V230 V

Cap

acity

(kB

TU/h

)


Inpu

t(kW

)


Cur

rent

(A)


4-4-4. PUMY-P48NKMU1(-BS) <heating>

OCH612

20

4-5. CORRECTING CAPACITY FOR CHANGES IN THE LENGTH OF REFRIGERANT PIPING(1) During cooling, obtain the ratio (and the equivalent piping length) of the outdoor units rated capacity and the total in-use

indoor capacity, and find the capacity ratio corresponding to the standard piping length from Figure 11 to 13. Then multiply by the cooling capacity from Figure 7 and 8 in "4-2. CORRECTION BY TEMPERATURE" to obtain the actual capacity.

(2) During heating, find the equivalent piping length, and find the capacity ratio corresponding to standard piping length from Figure 13. Then multiply by the heating capacity from Figure 9 and 10 in "4-2. CORRECTION BY TEMPERATURE" to obtain the actual capacity.

(1) Capacity Correction Curve

0 50 100 150 200 250 300 350 400 450 500 550 6000.50

0.55

0.60

0.65

0.70

0.75

0.80

0.85

0.90

0.95

1.00

0 50 100 150 200 250 300 350 400 450 500 550 6000.50

0.55

0.60

0.65

0.70

0.75

0.80

0.85

0.90

0.95

1.00

18 [kBTU/h]

27 [kBTU/h]

36 [kBTU/h]

Cap

acity

ratio

Piping equivalent length (ft)



Cap

acity

ratio


46.8 [kBTU/h]

24 [kBTU/h]

36 [kBTU/h]

48 [kBTU/h]

62.4 [kBTU/h]

Figure 11 PUMY-P36NKMU1(-BS) <Cooling>

Figure 12 PUMY-P48NKMU1(-BS) <Cooling>

OCH612

21

(2) Method for Obtaining the Equivalent Piping LengthEquivalent length for type P36·48 = (length of piping to farthest indoor unit) + (0.3 o number of bends in the piping) (m)Length of piping to farthest indoor unit: type P36·48.....150 m

4-5-1. Correction of Heating Capacity for Frost and DefrostingIf heating capacity has been reduced due to frost formation or defrosting, multiply the capacity by the appropriate correction factor from the following table to obtain the actual heating capacity.

Correction factor diagram

Outdoor Intake temperature <W.B.°F (°C)> 43(6) 37(4) 36(2) 32(0) 28(−2) 25(−4) 21(−6) 18(−8) 14(−10) 5(−15) −4(−20) −13(−25)

Correction factor 1.0 0.98 0.89 0.88 0.89 0.9 0.95 0.95 0.95 0.95 0.95 0.95

0 50 100 150 200 250 300 350 400 450 500 550 6000.70

0.75

0.80

0.85

0.90

0.95

1.00

Cap

acity

ratio



Figure 13 PUMY-P36/48NKMU1(-BS) <Heating>

OCH612

22

1.5m[4.9 ft]

1m[3.3 ft]

MICROPHONE

UNIT

GROUND

4-6. NOISE CRITERION CURVES

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000

APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISE

OC

TAVE

BA

ND

SO

UN

D P

RES

SUR

E LE

VEL,

dB

(0 d

B =

0.0

002 μb

ar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUMY-P36NKMU1(-BS)COOLING

MODE

HEATING49

SPL(dB)

53

LINE

90

80

70

60

50

40

30

20

1063 125 250 500 1000 2000 4000 8000

APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISE

OC

TAVE

BA

ND

SO

UN

D P

RES

SUR

E LE

VEL,

dB

(0 d

B =

0.0

002 μb

ar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUMY-P48NKMU1(-BS)COOLING

MODE

HEATING51

SPL(dB)

54

LINE

OCH612

23

5 OUTLINES AND DIMENSIONSPUMY-P36/48NKMU1(-BS)

Unit: mm<in>

Drain

hole

(5-{

33<1

-5/1

6>)

Botto

m p

iping

hole

(Kno

ck-O

ut)

154<6-1/16>

45<1

-25/

32>

81<3

-3/1

6>

86<3-3/8>

136<5-11/32>

160

<6-5

/16>

160

<6-5

/16>

110

<4-1

1/32

>16

0<6

-5/1

6>

Righ

t pipi

ng ho

le(K

nock

-Out)

Cond

uit ho

le({

24<1

5/16>

Knoc

k-Out)

Cond

uit ho

le( {

37<1

-15/32

>Kno

ck-O

ut)

Righ

t tru

nking

hole

(Kno

ck-O

ut)

92<3

-5/8

>

60<2

-3/8

>

5<3/16>60<2-3/8>

55<2

-3/1

6>

53<2

-3/3

2>

92<3-5/8>

26<1-1/32>27<1-1/16>

29<1

-5/3

2>

73<2-7/8>

{92

<3-5

/8>

Min

. 150

mm

<5-2

9/32

>M

in. 1

000m

m<3

9-3/

8>

Cond

uit ho

le({

37<1

-15/32

>Kno

ck-O

ut)Fr

ont t

runk

ing h

ole(K

nock

-Out

)

Fron

t pipi

ng ho

le(K

nock

-Out)

Cond

uit ho

le({

24<1

5/16>

Knoc

k-Out)

55<2-3/16> 27<1-1/16>

92<3

-5/8

>

75<2

-15/

16>

73<2-7/8> 26<1-1/32>

55<2

-3/1

6>

60<2-3/8>

5<3/16>

60<2

-3/8

>

{92

<3-5

/8>

FREE

Min

. 15m

m<1

9/32

>M

in. 1

5mm

<19/

32>

Cond

uit ho

le({

24<1

5/16>

Knoc

k-Out)

Cond

uit ho

le({

37<1

-15/32

>Kno

ck-O

ut)

Rear

trun

king h

ole(K

nock

-Out)

Rear

pipin

g hole

(Kno

ck-O

ut)

75<2

-15/

16>

60<2-3/8>

92<3

-5/8

>

73<2-7/8> 26<1-1/32>

27<1-1/16>55<2-3/16>

55<2

-3/1

6>

5<3/16>

60<2

-3/8

>

{92

<3-5

/8>

1/2 in

ch C

ondu

itatt

achm

ent

{22.2

<7/8>

{27.8

<1-3/

32>

Whe

n in

stal

ling

the

cond

uit.

Set

the

atta

chm

ent t

o th

e in

ner s

ide

of e

ach

pane

l.

3/4 in

ch C

ondu

itatt

achm

ent

Scale

1:5

24.7<31/32>

5<3/16>

60<2

-3/8

>22

.5<7

/8>

100

<3-1

5/16

>

Install

ation F

eet

2-U

Shap

ed no

tched

holes

(Fou

ndati

on B

olt M

10<W

3/8>)

2-12

×36 O

val h

oles

(Fou

ndati

on B

olt M

10<W

3/8>)

Side

Air

Inta

ke

Rear

Air

Inta

ke

Air D

ischa

rge

60.5

<2-3

/8>

42<1

-21/

32>

19<3/4>

600

<23-

5/8>

330<13>

225

<8-2

7/32

>22

5<8

-27/

32>

28<1-3/32>

70<2

-3/4

>

417<16-13/32>

25<1>

370<14-9/16>

39.5

<1-9

/16>

0056<2

-7/3

2>

0 53<2

-3/3

2>

Rear

pipi

ng co

ver

Fron

t pipi

ng co

ver

Air i

ntak

e

Side

Air

Inta

ke

21Hand

le for

mov

ing

Servi

ce pa

nel

Grou

nd fo

r the

tran

smiss

ion lin

eGr

ound

for c

once

ntra

tion

cont

rolFo

r con

cent

ratio

nco

ntro

lFo

r the

tra

nsm

issio

n lin

eFo

r the

po

wer s

uppl

y

Term

inal

con

nect

ion

From

left

to ri

ght

Hand

le for

mov

ingG

roun

d fo

r the

pow

er s

uppl

y("

GR

"mar

king

pos

ition

)

*1485<19-3/32>

1050

<41-

11/3

2>

362

<14-

1/4>

*1426<16-25/32>

1067<42>

26<1-1/32>

632<24-7/8> 369<14-17/32>

1338<52-11/16>

Hand

le fo

rm

oving

Han

dle

for

mov

ing

Rear

Air

Inta

ke

21Re

frigera

nt GA

S pipe

conn

ection

(FLA

RE)

{ 15.8

8 (5/8

F)Re

frigera

nt LIQ

UID pip

e con

nectio

n (FL

ARE)

{ 9.52

(3/8F

)*1

Ind

ication

of ST

OP VA

LVE c

onne

ction lo

cation

.

4 PIPI

NG-W

IRING

DIRE

CTION

S3 F

OUND

ATIO

N BO

LTS

2 SER

VICE

SPA

CE1 F

REE S

PACE

(Arou

nd th

e unit

)

Max.<Fou

ndat

ion

bolt

heig

ht>

FOUN

DATIO

N

Servic

e spa

ce

Min. Min.

Min.

Min.

15<1

9/32

>

500

<19-

11/1

6>

500<19-11/16>

150<5-29/32>

30<1-3/16>

Piping

Knoc

k-Out

Hole

Detai

ls

Exam

ple of

Notes

The d

iagra

m be

low sh

ows a

basic

exam

ple.

Expla

ntion

of pa

rticula

r deta

ils ar

egiv

en in

the i

nstal

lation

man

uals

etc.

Dime

nsion

s of s

pace

need

edfor

servi

ce ac

cess

are

show

n in t

he be

low di

agra

m.

Pleas

e sec

ure th

e unit

firml

ywit

h 4 fo

unda

tion (

M10<

W3/8>

) bolt

s.(B

olts a

nd w

ashe

rs mu

st be

purch

ased

loca

lly.)

Pipi

ng a

nd w

iring

con

nect

ions

can

be m

ade

from

4 d

irect

ions

:FR

ONT

, Rig

ht, R

ear a

nd B

elow

.

OCH612

24

6

Cautions when Servicing

! WARNING: When the main supply is turned off, the voltage [340 V] in the main capacitor will drop to 20 V in approx. 2 minutes (input voltage: 230 V). When servicing, make sure that LED1, LED2 on the outdoor multi controller circuit board goes out, and then wait for at least 1 minute.Components other than the outdoor circuit boards may be faulty: Check and take corrective action, referring to the service manual. 　Do not replace the outdoor circuit boards without checking.

1 2 3 4 5 6 7 8

〔Example〕 When the compressor and SV1 are on during cooling operation.

Bit

Indication

1Compressor operated

2

52C

3

21S4

4

SV1

5

（SV2）

6

ー

7

ー

8

Always lit

During normal operation The LED indicates the drive state of outdoor unit.

When fault requiring inspection has occurred　The LED alternately indicates the check code and the address of the unit in which the fault has occurred.

NOTES: 1.Refer to the wiring diagrams of the indoor units for details on wiring of each indoor unit.2.Self-diagnosis function The indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch (SW1) and LED indication (LED1, LED2) found on the outdoor multi controller circuit board. LED indication : Set all contacts of SW1 to OFF.

SYMBOL NAMETB1 Terminal Block 〈Power Supply〉TB3

TB7

MC Motor For CompressorMF1,MF2 Fan Motor

LEV-A,LEV-B Linear Expansion Valve

21S4

SV1

TH3 Thermistor〈Outdoor Liquid Pipe〉TH2 Thermistor〈Hic Pipe〉

TH4 Thermistor〈Compressor〉TH6 Thermistor〈Suction Pipe〉TH7TH8

Thermistor〈Ambient〉Thermistor〈Heat Sink〉

63H High Pressure Switch63HS High Pressure Sensor63LS Low Pressure Sensor

DCLP.B. Power Circuit Board

Connection Terminal〈U/V/W-Phase〉U/V/W

MULTI.B.

Fuse〈UL6.3A250V〉F1,F2

Switch〈Display Selection〉SW1Switch〈Function Selection〉SW2Switch〈Test Run〉SW3Switch〈Model Selection〉SW4Switch〈Function Selection〉SW5Switch〈Function Selection〉SW6Switch〈Function Selection〉SW7Switch〈Model Selection〉SW8Switch〈Function Selection〉SW9Switch〈Unit Address Selection, ones digit〉SWU1Switch〈Unit Address Selection, tens digit〉SWU2

LED〈Operation Inspection Display〉LED1,LED2LED〈Power Supply to Main Microcomputer〉LED3

Multi Controller Circuit Board

Connector〈Connection For Option〉SSConnector〈Connection For Option〉CN3D

CNS1

Connector〈Centralized Control Transmission Line〉CNS2

Connector〈Connection For Option〉CN3SConnector〈Connection For Option〉CN3NConnector〈Connection For Option〉CN51

RelayX501～505M-NET P.B. M-NET Power Circuit Board

TB1

Connection Terminal〈L-Phase〉LIConnection Terminal〈N-Phase〉NI

EI,E2,E3,E4Power ModuleIGBTConnection Terminal〈Reactor〉DCL1,DCL2

Reactor

Terminal Block 〈Centralized Control Transmission Line〉

Terminal Block 〈Indoor/Outdoor Transmission Line〉

Connector〈Indoor/Outdoor Transmission Line〉

ConnectionTerminal〈Electrical Parts Box〉

ConnectionTerminal〈Electrical Parts Box〉

Solenoid Valve Coil〈4-Way Valve〉

Solenoid Valve Coil〈Bypass Valve〉

MODELS

PUMY-P36NKMU1

PUMY-P48NKMU1

SW4 SW8*1 MODEL SELECTION

*2 Use copper supply wires.Utilisez des fils d' slimentation en cuivre.

The black square（）indicates a switch position.

ONOFF

1 2 3 4 5 6

ONOFF

1 2

ONOFF

1 2 3 4 5 6

ONOFF

1 2

RD

RD

YE

YE

P. B.

BK WH

WH

WH

U

U

V

V

W

W

RD

MC

MS3～

M1

M2

S

TB3

TO INDOOR UNITCONNECTING WIRES30VDC(Non-polar)

FOR CENTRALIZEDCONTROL30VDC(Non-polar)

M1

M2

S

TB7

2

2

GNYE

BU

RDPOWER SUPPLY208/230VAC60Hz

TB1

L1

L2

GR

CN51（WH）

SW6

SW2SW8SW1

SW7SW3SW4

*1

*2

*1

SW5SWU2 SWU1 SW9

TRANSLED1

CN2（RD）

CN4（WH）

LED3

CN3D（WH）

CN3S（RD）

CN3N（BU）

CN1（WH）

ＴB1BK

CNDC（PK）

t゜ t゜ t゜ t゜

LEV-BM

1 41

3

3

1 3 1 3 1 3

CN52（RD）1 3

31

12

2 21 11 2

1 2

2

2 1 2 1

2

31 21

TH7 TH6 TH3 TH463HS63H

1

7

7

1 5

1 5TH7/6（RD）

CNLVB（RD）

TH3（WH）

TH4（WH）

t゜

TH2

t゜

TH8

TH2（BK）

63HS（WH）

1 3 1 3

63LS

63LS（BU）

63H（YE）

MULTI. B.

LED2

M-NET P.B.

52C（BK）

31 31 31

X505

21S4（GN）

SV1（GY）

SV2（BU）

SS（WH）

21S4 SV1

CNAC（RD）

CNS1（RD）

CNS2（YE）

F1

F2X504

X503

X502

X501

CN102（WH）

CN2（WH）

4

4

1

1

CN40（WH）4 1

5 3 1

CN41（WH）4 1

4

2

3

CN2（RD）

CN4（WH）

1 2

2

1

7

7

22

CNDC（PK）3 1

2

N2

P2+

～

～

-

+

DCL

DCL2 DCL1

IGBT

E I

E 4

E2CN

AC1

（W

H）L IN I

BK

BK

21

3

CNAC

2（

RD）

1

3

E3

BK

2

is the switch position.

LEV-AM

1 5CNLVA（WH）

CN52C（RD）1 3

3

52C

52C

BK

17

CNF1（WH）

1 7

CNF2（WH）

MS3～

MＦ1

MS3～

MＦ2

WIRING DIAGRAM

PUMY-P36/48NKMU1(-BS)

OCH612

25

7 NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION

7-1. TRANSMISSION SYSTEM SETUP

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

051 0

1 2 3 45

67890

1 2 3 45

6789

056

001

01 2 3 4

56789

01 2 3 4

56789

010

101

10

1 2 3 45

67890

1 2 3 45

6789

01 2 3 4

56789

01 2 3 4

56789

002

102

104

154

11

11

11

01 2 3 4

56789

01 2 3 4

56789

009

01 2 3 4

56789

01 2 3 4

56789

008

01 2 3 4

56789

01 2 3 4

56789

003

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

007

01 2 3 4

56789

01 2 3 4

56789

006

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

004

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

01 2 3 4

56789

005

1 A

tran

smis

sion

wire

mus

t be

co

nnec

ted

to e

ach

refri

gera

nt

syst

em (o

utdo

or a

nd in

door

).

2 S

et a

ddre

sses

:

Out

door

uni

t ....

......

....0

51–1

00

Indo

or u

nit .

......

......

....0

01–0

50

Rem

ote

cont

rolle

r ....

.101

–200

3 P

UM

Y ha

s no

100

s di

git s

witc

h.

The

addr

ess

auto

mat

ical

ly b

ecom

e

"100

" if i

t is

set a

s "0

1–50

".

Rem

ote

cont

rolle

rR

emot

eco

ntro

ller

Rem

ote

cont

rolle

rR

emot

eco

ntro

ller

105

Rem

ote

cont

rolle

r

157

Rem

ote

cont

rolle

r10

7R

emot

eco

ntro

ller

For c

entra

lized

man

agem

ent

For C

ity M

ulti

indo

or u

nit

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Pip

ing

Out

door

uni

t

Out

door

uni

t

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Indo

or u

nit

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

Add

ress

SW

For c

entra

lized

man

agem

ent

For C

ity M

ulti

indo

or u

nit

Tran

smis

sion

wire

2

1

OCH612

26

7-2. Special Function Operation and Settings for M-NET Remote Controller

7-3. REFRIGERANT SYSTEM DIAGRAM PUMY-P36/48NKMU1(-BS)

Solenoidvalve (SV1)

High pressuresensor (63HS)

High pressureswitch (63H)

Low pressuresensor(63LS)

Oil separator

Service port

Strainer

Distributor

Compressor

Refrigerant piping specifications <dimensions of flared connector> Capillary tube for oil separator : [2.5 o [0.8 o L1000

Capacity Item Liquid piping Gas piping

P06, P08, P12, P15, P18

P24, P27, P36, P48, P54

P36, P48

Indoor unit

Outdoor unit

1/4 <[6.35>

3/8 <[9.52>

3/8 <[9.52>

1/2 <[12.7>

5/8 <[15.88>

5/8 <[15.88>

Thermistor (TH4)<Compressor>

Thermistor (TH7)<Ambient>

<Outdoor liquid pipe>Thermistor (TH3)

Unit: in <mm>

Ball valve

StrainerRefrigerant Gas pipe

4-way valve

Check valve<Low pressure>

Thermistor (TH6)<Suction pipe>

Check valve<High pressure>

Strainer

Strainer Strainer

Strainer

Thermistor (TH2)<Hic pipe>

RefrigerantLiquid pipe

Stop valve

Service port

Capillary tube

Accumulator

Strainer

Refrigerant flow in cooling Refrigerant flow in heating

For the detailed procedure of "group settings" and "paired settings", refer to the remote controller's manuals.

OCH612

27

7-4. SYSTEM CONTROL7-4-1. Example for the System• Example for wiring control cables, wiring method and address setting, permissible lengths, and the prohibited items are listed

in the standard system with detailed explanation.

A. Example of a M-NET remote controller system (address setting is necessary.)Example of wiring control cables Wiring Method and Address Setting

• 1 M-NET remote controller for each M-NET control indoor unit.

• There is no need for setting the 100 position on the M-NET remote controller.

1. Standard operation

2. Operation using 2 M-NET remote controllers

• Using 2 M-NET remote controllers for each M-NET control indoor unit.

a. Use feed wiring to connect terminals M1 and M2 on transmission cable block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission cable block (TB5) of each M-NET control indoor unit (M-IC). Use non-polarized 2-core wire.

b. Connect terminals M1 and M2 on transmission cable terminal block (TB5) for each indoor unit with the termi-nal block (TB6) for M-NET the remote controller (M-NET RC).

c. Set the address setting switch (on outdoor unit P.C.B) as shown below.

3. Group operation

• Multiple M-NET control indoor units operated together by 1 M-NET remote controller

a. Same as above ab. Same as above bc. Set address switch (on outdoor unit P.C.B) as

shown below.

a. Same as above ab. Connect terminals M1 and M2 on transmission cable termi-

nal block (TB5) of the M-IC main unit with the most recent address within the same M-NET control indoor unit (M-IC) group to terminal block (TB6) on the M-NET remote controller.

c. Set the address setting switch (on outdoor unit P.C.B) as shown below.

d. Use the M-NET control indoor unit (M-IC) within the group with the most functions as the M-IC (Main) unit.

Combinations of 1 through 3 above are possible.

TB5 TB15

(01)

(101)

M-IC(Main)

TB3 TB7

(51)

OC

TB5 TB15

(02)

M-IC(Sub)

M-NET RC

1 2

A B

M1 M2 S M1 M2 SM1 M2 S 1 2M1 M2 S

Group A

TB5 TB15

(01)

(101)M-NET RC

(Main)

(151)

M-IC

TB3 TB7

(51)

OC

TB5 TB15

(02)

M-IC

M-NET RC(Sub)

(102)M-NET RC

(Main)

(152)M-NET RC

(Sub)

1 2M1 M2 S M1 M2 SM1 M2 S 1 2M1 M2 S

A B A B A B A B

TB51 2

TB15

(01)

(101)

M-IC

A B

M1 M2

TB3S

TB7

(51)

OCL1

L3

L2

TB5 TB15

(02)

M-IC

M-NET RC

(102)M-NET RC

l1

l2

M1 M2 SM1 M2 S 1 2M1 M2 S

A B Unit Range Setting Method

M-NET control indoor unit (M-IC) 001 to 050 —

Outdoor unit (OC) 051 to 100 Use the smallest address of all the indoor unit plus 50.

M-NET Remote controller (M-NET RC) 101 to 150 Indoor unit address plus 100

Unit Range Setting MethodM-NET control

indoor unit (M-IC) 001 to 050 —

Outdoor unit (OC) 051 to 100 Use the smallest address of all the indoor units plus 50.

Main M-NET Remote Controller

(M-NET RC)101 to 150 Indoor unit address plus 100

Sub M-NET Remote Controller

(M-NET RC)151 to 200 Indoor unit address plus 150

Unit Range Setting Method

M-IC (Main) 001 to 050Use the smallest address within the same group of M-NET control indoor units.

M-IC (Sub) 001 to 050

Use an address, other than that of the M-IC (Main) from among the units within the same group of indoor units. This must be in sequence with the M-IC (Main).

Outdoor unit 051 to 100 Use the smallest address of all the M-NET control indoor units plus 50.

Main M-NET Remote Controller

(M-NET RC)101 to 150 Set at an M-IC (Main) address

within the same group plus 100.

OCH612

28

• Name, Symbol and the Maximum Remote controller Units for Connection

Permissible Lengths Prohibited items

Longest transmission cable lengthAWG 16 [1.25 mm²]L1 + L2, L3 + L1 [ 656 ft [200 m]M-NET Remote controller cable length1. If AWG 20 to AWG 16 [0.5 to 1.25 mm²]R1, R2 [ 33ft [10 m]

2. If the length exceeds 33ft [10 m], the exceeding section should be AWG 16 [1.25 mm²] and that section should be a value within the total extension length of the transmission cable and maxi-mum transmission cable length. (L3)

Same as above

Same as above

1 Use the M-NET control indoor unit (M-IC) address plus 150 as the sub M-NET remote controller address. In this case, it should be 152.

2 3 or more M-NET remote controllers (M-NET RC) cannot be connected to 1 M-NET control indoor unit.

1 The M-NET remote controller address is the M-NET control indoor unit main address plus 100. In this case, it should be 101.

• M-NET remote controller (M-NET RC) and MA remote controller (MA RC) cannot be used together.

• Do not connect anything with TB15 of M-NET control indoor unit (M-IC).

Name Symbol Maximum units for connectionOutdoor unit OC —M-NET control

Indoor unit M-IC 1 OC unit can be connected to 1 to 7 (P36) / 1 to 10 (P48) M-IC unitsM-NET remote

controller M-NET RC Maximum 2 M-NET RC for 1 indoor unit, Maximum 12 M-NET RC for 1 OC

NO

TB5 TB15

(01)

(101)

M-IC

TB3 TB7

(51)

OC

TB5 TB15

(02)

M-NET RC

TB15

MA-RC

1 2

A B

M1 M2 S M1 M2 SM1 M2 S 1 2M1 M2 S

A B

M-IC

NO NO

TB5 TB15

(01)

(101)M-NET RC

(Main)

(151)

M-IC

TB3 TB7

(51)

OC

TB5 TB15

(02)

M-IC

M-NET RC(Sub)

(102)M-NET RC

(Main)

(104)2M-NET RC

1 2

A B

M1 M2 S M1 M2 SM1 M2 S 1 2M1 M2 S

A B A B A BA B

(103)1M-NET RC

(Sub)

NO

TB5 TB15

(01)

(102)

M-IC(Main)

TB3 TB7

(51)

OC

TB5 TB15

(02)

M-IC(Sub)

M-NET RC

1 2

A B

M1 M2 S M1 M2 SM1 M2 S 1 2M1 M2 S

OCH612

29

B. Example of a group operation system with 2 or more outdoor units and a M-NET remote controller.(Address settings are necessary.)

Exa

mpl

es o

f Tra

nsm

issi

on C

able

Wiri

ngW

iring

Met

hod

Add

ress

Set

tings

a. Always use shielded wire when making connections between the outdoor unit (OC) and the M-NET control indoor unit (M-IC), as well for all OC-OC, and IC-IC wiring intervals.

b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block of the M-NET control indoor unit (M-IC).

c. Connect terminals M1 and M2 on the transmission cable terminal block of the M-NET control indoor unit (M-IC) that has the most recent address within the same group to the terminal block on the M-NET remote controller (M-NET RC).

d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).

e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board.f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-

nal S on the power supply unit with the earth.g. Set the address setting switch as follows.

h. The group setting operations among the multiple M-NET control indoor units is done by the M-NET remote controller (M-NET RC) after the electrical power has been turned on.

Unit Range Setting MethodM-IC (Main) 01 to 50 Use the smallest address within the same group of M-NET control indoor units.

M-IC (Sub) 01 to 50 Use an address, other than the M-IC (Main) in the same group of M-NET control indoor units. This must be in sequence with the M-IC (Main).

Outdoor Unit 51 to 100 Use the smallest address of all the M-NET control indoor units plus 50.The address automatically becomes “100” if it is set as “01–50”.

Main M-NET Remote Controller 101 to 150 Set at an M-IC (Main) address within the same group plus 100.Sub M-NET Remote Controller 151 to 200 Set at an M-IC (Main) address within the same group plus 150.

MA Remote Controller — Address setting is not necessary. (Main/sub setting is necessary.)

A

B

C

E

D

TB7TB3

M-IC(51)

TB5

M-NET RC

(01)

M-IC

TB5

(03)

M-IC

TB5

(02)

M-IC

TB5

(04)

M-IC

TB5

(05)

TB5

(07)

IC

TB5

(06)

L2

L1

(101) (105)

(104)

(155)

OC

TB7

(53)

OC

3

Power SupplyUnit

System controller

L3

L6

L7

L4

L5

2

4

1

A : GroupB : GroupC : GroupD : Shielded WireE : Sub M-NET Remote Controller( ): Address example

r

rr r

M1 M2 S M1 M2 S M1 M2 S M1 M2 S

A BA BA B

M1 M2 S M1 M2 S M1 M2 SSM1 M2 STB3

M1 M2 S

M1 M2 S

A B

M1 M2

M1 M2 S M1 M2 S

NOM-IC

M-NET RC

M-NET RC M-NET RC

OCH612

30

• Name, Symbol, and the Maximum Units for ConnectionP

erm

issi

ble

Leng

thP

rohi

bite

d ite

ms

• Longest length via outdoor units : L1+L2+L3+L4, L1+L2+L3+L5, L1+L2+L6+L7 [ 1640 ft [500 m] (AWG 16 [1.25 mm² ])• Longest transmission cable length : L1, L3+L4, L3+L5, L2+L6, L7 [ 656 ft [200 m] (AWG 16 [1.25 mm²])• M-NET Remote controller cable length : R1,R2, R2+R3, R4 [ 33 ft [10 m] (AWG 20 to AWG 16 [0.5 to 1.25 mm²])

If the length exceeds 33 ft [10 m], use a AWG 16 [1.25 mm²] shielded wire. The length of this section (L8) should be included in the calculation of the maximum length and overall length.

• Never connect together the terminal blocks (TB5) for transmission wires for M-NET control indoor units (M-IC) that have been connected to different outdoor units (OC).

• Set all addresses to ensure that they are not overlapped.• M-NET remote controller and MA remote controller cannot be connected with the M-NET control indoor unit of the same

group wiring together.

A

B

C

E

D

M-IC(51)

TB5

M-NET RC

(01)

TB5

(03)

M-IC

TB5

(02)

TB5

(04)

M-IC

TB5

(05)

TB5

(07)

M-IC

TB5

(06)

(101) (105)

(104)

(155)

OC

(53)OC

Power SupplyUnit

A : GroupB : GroupC : GroupD : Shielded WireE : Sub M-NET Remote Controller( ): Address example

TB7TB3M1 M2 S

TB7

M1 M2 SM1 M2 S

TB3

M1 M2 S

M1 M2 S

M1 M2 S M1 M2 S M1 M2 S M1 M2 S

M1 M2 S M1 M2 S M1 M2 S

A B A B A B

A B

M1 M2 S

System controller

NONO

M-IC M-IC M-IC

M-NET RC M-NET RC

M-NET RC

OCH612

31

C. Example of a MA remote controller system (address setting is not necessary.)NOTE : In the case of same group operation, need to set the address that is only main M-NET control indoor unit.

Example of wiring control cables Wiring Method and Address Setting

• 1 MA remote controller for each indoor unit.

1. Standard operation

2. Operation using two remote controllers

• Using 2 MA remote control-lers for each M-NET control indoor unit.

a. Use feed wiring to connect terminals M1 and M2 on transmission cable block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the trans-mission cable block (TB5) of each M-NET control indoor unit (M-IC). Use non-polarized 2-core wire.

b. Connect terminals 1 and 2 on transmission cable terminal block (TB15) for each M-NET control indoor unit with the terminal block for the MA remote controller (MA-RC).

3. Group operation

• Multiple indoor units operated together by 1 MA remote con-troller.

a. The same as above ab. The same as above bc. In the case of using 2 remote controllers, connect

terminals 1 and 2 on transmission cable terminal block (TB15) for each indoor unit with the terminal block for 2 MA remote controllers.· Set either one of the MA remote controllers to "sub remote controller".

Refer to the installation manual of MA remote con-troller.

a. The same as above ab. The same as above bc. Connect terminals 1 and 2 on transmission cable

terminal block (TB15) of each M-NET control indoor unit, which is doing group operation with the terminal block the MA remote controller. Use non-polarized 2-core wire.

d. In the case of same group operation, need to set the address that is only main M-NET control indoor unit. Please set the smallest address within number 01–50 of the M-NET control indoor unit with the most functions in the same group.

Combinations of 1 through 3 above are possible.

MA-RC

TB5 TB15

(00)

M-IC

TB3 TB7

(00)

OC

TB5 TB15

(00)

M-IC

r7

r8

M1 M2 S M1 M2 S M1 M2 S

A B

1 2M1 M2 S1 2

MA-RC (Main)

TB5 TB15

(00)

M-IC

TB3 TB7

(00)

OC

TB5 TB15

(00)

M-IC

MA-RC(Sub)

MA

r3

r4

r5

M1 M2 S M1 M2 S 1 2M1 M2 S 1 2M1 M2 S

A B A B A B

TB5 TB15

(00)

M-IC

TB3 TB7

(00)

OC

L1 L2

TB5 TB15

(00)

M-IC

MA-RCMA-RC

r1

r2

M1 M2 S M1 M2 S 1 2M1 M2 S 1 2M1 M2 S

A BA B

OCH612

32

Permissible Lengths Prohibited items

Longest transmission cable length:L1 + L2 [ 656 ft [200 m] (AWG 16 [1.25 mm²])MA remote controller cable length:R1, R2 [ 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])

Longest transmission cable length:L1 + L2 [ 656 ft [200 m] (AWG 16 [1.25 mm²])MA remote controller cable length:R3 +R4, R5 [ 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])

Longest transmission cable length:L1 + L2 [ 656 ft [200 m] (AWG 16 [1.25 mm²])MA remote controller cable length:R7 +R8 [ 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])

The MA remote controller and the M-NET remote controller cannot be used together with the M-NET con-trol indoor unit of the same group.

3 MA remote controllers or more cannot be connected with the M-NET control indoor unit of the same group.

The second MA remote controller is con-nected with the terminal block (TB15) for the MA remote controller of the same M-NET control indoor unit (M-IC) as the first MA remote control.

NO

MA-RC

(00)

M-IC(00)

OC

MA-RC

(00)

M-IC

TB51 2

TB15

A B

M1 M2

TB3S

TB7 TB5 TB15M1 M2 SM1 M2 S 1 2M1 M2 S

A B

MA-RC(Main)

TB5 TB15

(00)

M-IC

TB3 TB7

(00)

OC

TB5 TB15

(00)

M-IC

MA-RC(Sub)

MA-RC(Main)

MA-RC(Sub)

MA-RC(Main)

1 2M1 M2 S M1 M2 SM1 M2 S

A B A B A B A B A B

1 2M1 M2 S

NO

NO

TB5 TB15TB3 TB7

(00)

OC

TB5 TB15

(00)

M-IC

MA-RCMA-RCM-NET RC

1 2

A B

M1 M2 S M1 M2 SM1 M2 S 1 2M1 M2 S

A BA B

(00)

M-IC

(00)

OCH612

33

D. Example of a group operation with 2 or more outdoor units and a MA remote controller.(Address settings are necessary.)

Exa

mpl

es o

f Tra

nsm

issi

on C

able

Wiri

ngW

iring

Met

hod

Add

ress

Set

tings

a. Always use shielded wire when making connections between the outdoor unit (OC) and the M-NET control indoor unit (M-IC), as well for all OC-OC, and IC-IC wiring intervals.

b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable terminal block of the M-NET control indoor unit (M-IC).

c. Connect terminals M1 and M2 on the transmission cable terminal block of the M-NET control indoor unit (M-IC) that has the most recent address within the same group to the terminal block on the M-NET remote controller (M-NET RC).

d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board.f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-

nal S on the power supply unit with the earth.g. Set the address setting switch as follows.

h. The group setting operations among the multiple M-NET control indoor units is done by the M-NET remote controller (M-NET RC) after the electrical power has been turned on.

i. When connecting PWFY unit• For PWFY series, do not set up group connection with other indoor units.• LOSSNAY is not available for use with PWFY series.• Use a WMA remote controller for operation of PWFY series.For more details, refer to the service manual for PWFY series.

Unit Range Setting MethodM-IC (Main) 01 to 50 Use the smallest address within the same group of indoor units.

M-IC (Sub) 01 to 50 Use an address, other than the M-IC (Main) in the same group of M-NET indoor units. This must be in sequence with the M-IC (Main).

Outdoor Unit 51 to 100 Use the smallest address of all the indoor units plus 50.The address automatically becomes “100” if it is set as “01–50”.

Main M-NET Remote Controller 101 to 150 Set at an M-IC (Main) address within the same group plus 100.Sub M-NET Remote Controller 151 to 200 Set at an M-IC (Main) address within the same group plus 150.

MA Remote Controller — Address setting is not necessary. (Main/sub setting is necessary.)

A

B

C

E

D

TB7

M-IC(51)

TB15 TB15

TB15

MA-RC

(01)

M-IC

TB5

(03)

M-IC

TB5TB5

(02)

M-IC

TB5

(04)

M-IC(05)

M-IC(07)

M-IC(06)

L1

MA-RC

MA-RC

MA-RC

OC

(53)OC

1

m4

3

Power SupplyUnit

L3

L7

L4

m3

1

1

2 2

TB3

A : GroupB : GroupC : GroupD : Shielded WireE : Sub MA Remote Controller( ): Address example

m

m

m

m

mm

M1 M2 S M1 M2 S

TB7

M1 M2 SM1 M2 S

TB3

M1 M2 S

M1 M2 S

M1 M2 S M1 M2 S

M1 M2 S

A B

1 2

1 2 M1 M2 S 1 2

1 2TB15TB5

M1 M2 S 1 2TB15TB5

M1 M2 S 1 2

A B A B

TB15 TB5M1 M2 S 1 2

TB15

A B

L2

L6

System controller

NO

OCH612

34

• Name, Symbol, and the Maximum Units for ConnectionP

erm

issi

ble

Leng

thP

rohi

bite

d ite

ms

• Never connect together the terminal blocks (TB5) for transmission wires for M-NET control indoor units (M-IC) that have been connected to different outdoor units (OC).

• M-NET remote controller and MA remote controller cannot be connected with the M-NET control indoor unit of the same group wiring together.

A : GroupB : GroupC : GroupD : Shielded WireE : Sub MA Remote Controller( ): Address example

A

B

C

E

M-IC(51)

TB5 TB15 TB15

TB15 TB15

MA-RC

(01)

M-IC

TB5

(03)

M-IC

TB5

(02)

M-IC

TB5

(04)

M-IC(05)

M-IC

TB5

(07)

M-IC(06)

MA-RC

MA-RC

MA-RC

OC

(53)OC

Power SupplyUnit

TB7TB3M1 M2 S M1 M2 S

TB7

M1 M2 SM1 M2 S

TB3

M1 M2 S

M1 M2 S

M1 M2 S M1 M2 S M1 M2 S

M1 M2 S M1 M2 S

A B

A B

A B A B

1 2

1 2 1 2 1 2

1 2TB15TB5

M1 M2 S 1 2TB15TB5

M1 M2 S 1 2

TB15

D

System controller

NO

NO

Longest length via outdoor unit (M-NET cable): L1+L2+L3+L4 and L1+L2+L6+L7 [1640 ft [500 m] (AWG 16 [1.25 mm²] or more)Longest transmission cable length (M-NET cable): L1 and L3+L4 and L2+L6 and L7 [656 ft [200 m] (AWG 16 [1.25 mm²] or more)MA Remote controller cable length: m1 and m1+m2+m3 and m1+m2+m3+m4 [ 656 ft [200 m] (AWG 22 to AWG 16 [0.3 to 1.25 mm²])

OCH612

35

8 TROUBLESHOOTING

8-1. CHECK POINTS FOR TEST RUN8-1-1. Procedures before test run(1) Before a test run, make sure that the following work is completed.

• Installation related : Make sure that the panel of cassette type and electrical wiring are done.Otherwise electrical functions like auto vane will not operate normally.

• Piping related : Perform leakage test of refrigerant and drain piping.Make sure that all joints are perfectly insulated.Check stop valves on both liquid and gas side for full open.

• Electrical wiring related : Check ground wire, transmission cable, remote controller cable, and power supply cable for secure connection.Make sure that all switch settings of address or adjustments for special specification systems are correctly settled.

(2) Safety check : With the insulation tester of 500 V, inspect the insulation resistance.Do not touch the transmission cable and remote controller cable with the tester.The resistance should be over 1.0 M". Do not proceed inspection if the resistance is under 1.0 M".Inspect between the outdoor unit power supply terminal block and ground first, metallic parts like refrigerant pipes or the electrical box next, then inspect all electrical wiring of outdoor unit, indoor unit, and all linked equipment .

(3) Before operation : a) Turn the power supply switch of the outdoor unit to on for compressor protection. For a test run, wait at least 12 hours

from this point.b) Register control systems into remote controller(s). Never touch the ON/OFF switch of the remote controller(s). Refer to “7-2.

Special Function Operation and Settings for M-NET Remote Controller” as for settings. In MA remote controller(s), this registration is unnecessary.

(4) More than 12 hours later from power supply to the outdoor unit, turn all power switch to on for the test run. Perform test run according to the “Operation procedure” table of the bottom of this page. While test running, make test run reports .

8-1-1-1. Test run for M-NET Remote controllerFor the detailed procedure, refer to the remote controller's manuals.

OCH612

36

F1 F2 F3 F4

unem ecivreS

rosruC:unem niaM

Test runInput maintenance info.Function settingCheckSelf check

F1 F2 F3 F4

Test run menu

CursorService menu:

Test runDrain pump test run

1 Select "Service" from the Main menu, and press the button.

2 Select "Test run" with the F1 or F2 button, and press the button.

Select "Test run" with the F1 or F2 button, and press the button.

F1 F2 F3 F4

CoolPipe

AutoSwitch disp.

Mode Fan

RemainTest run

F1 F2 F3 F4

Remain

Vane

Cool mode: Check the cold air blows out.Heat mode: Check the heat blows out.

Press the F1 button to go through the operation modes in the order of "Cool and Heat".

Check the auto vane with the F1 F2 buttons. Check the operation of the outdoor unit fan, also.

Press the button to return to “Test run operation”.

Press the button.

When the test run is completed, the “Test run menu” screen will appear.The test run will automatically stop after 2 hours.*The function is available only for the model with vanes.

Test run operation

Auto vane check*

Press the button and open the Vane setting screen.

Function buttons

F1 F2 F3 F4

MENU RETURN SELECT ON/OFF

8-1-1-2. Test run for wired remote controller <PAR-30MAA> <PAR-31MAA>

OCH612

37

8-1-2. Countermeasures For Error During Test Run

1 2 3 4 5 6 7 8

[Example]When the compressor and SV1 are on during cooling operation.

Bit

Indication

1Compressor operated

2

52C

3

21S4

4

SV1

5

(SV2)

6

—

7

—

8

Always lit

Self-diagnosis functionThe indoor and outdoor units can be diagnosed automatically using the self-diagnosis switch(SW1) and LED indication (LED1, LED2) found on the outdoor multi controller circuit board.LED indication : Set all contacts of SW1 to OFF.

During normal operationThe LED indicates the drive state of outdoor unit.

Detected UnitIndoor Outdoor Remote

Controller

3

3U7 1500 1 00

U 15011 011501

1508 1 08U 100 350

11U 10

U9 0 1 3 0

U5 30 330U 50 350U8 00 500U 5105 3 1 05U 510 7 1 1U 5109 1U 5110 8 1 1

5 5 01 3 1 03 5 0 3 1 00

UH 5300 3100 00

03 03 U

07 078 08

0 8313 5 833 5 8330 83

7100710171071057130

NOTES:

1. When the outdoor unit detects No ACK error/No response error, an object indoor unit is treated as a stop, and not assumed to be abnormal.2. The check codes displayed on the units may be different between the error source and others. In that case, please refer to the check code

of error source by displayed attribute and address.3. Refer to the service manual of indoor unit or remote controller for the detail of error detected in indoor unit or remote controller.

OCH612

Check code

Abnormal points and detection methods Causes and check points

Diagnosis Remedy

0 03

38

8-1-3. SELF-DIAGNOSIS ACTION BY FLOWCHART

OCH612

Check code


1 H

30 110 557 1 5 ]

10 0 ]H 30 110 ]

H

Diagnosis Remedy

110U

5101 51015101

110

1

39OCH612

Check code

110U

Diagnosis Remedy

0OCH612

Check code

130U

H


1 H 3H3H 0

H 3H1 3H 5

3H 00 3

3H H3H H

1TH7 T

1

Diagnosis Remedy

1

5 01 5 01

H

H

5 01

130

1OCH612

Check code

130U

H

Diagnosis Remedy

TH7

OCH612

Check code

130U

H

Diagnosis Remedy

1

3

8 8 HT H TH T

TH7

3OCH612

Check code

130U

H

Diagnosis Remedy

8 8 H TH TH T

1

3H

3H

3H

OCH612

Check code

1500U7


7 15 ]5

10

TH T3H H

TH 3H

THTH

Diagnosis Remedy

1

3 0 ] 700 " 50 10 ] 10 "8 0 ] 50 " 8 30 ] 1 0 "

10 0 ] 10 "

TH

TH

TH

5OCH612

Check code

1500U7

Diagnosis Remedy

8 8 H TH TH T

3H

3H

OCH612

Check code

1501U


1 15

1 T H T17 80 ]

3 TH7 TH3TH7 TH3 9 5 ]

T95 35 ]

1 T17 80 ]

0 0 ]19 90 ]

3H

TH3 TTH7 T

3H H

Diagnosis Remedy

1

510 510510

1501

7OCH612

Check code

1501U

Diagnosis Remedy

3H

3H

8OCH612

Check code

1501U


01 TH TH 1 ] 3 ]

TH 3 TH 1 ] 3 ] TH 1 T11 TH1TH T13 THTH 3 TH )

Diagnosis Remedy

9OCH612

Check code

1508


30 ]

1 TH TH 1 [ 18 10 ]TH 3 TH 1 [ 18 10 ]

3 TH [ 37 3:]TH 3 [ 37 3:] TH 1 T11 TH1

TH T13 THTH 3 TH

Diagnosis Remedy

50OCH612

Check code


30

Diagnosis Remedy

100U

1

T

51OCH612

Check code

100U

Diagnosis Remedy

5OCH612

Check code


30

Diagnosis Remedy

10U

1

Turn the power OFF to check for looseness, disconnection or converse phases of the compressor wiring

53OCH612

Check code

10U

Diagnosis Remedy

U

U U

U 7 1

5OCH612

Check code

0U9

1


0000

310 300 H

0 1

1 T 0 HT

2

55

5

5

0

Diagnosis RemedyT

3

7 8

350

55

T1

T1

ONOFF

1 2 3 4 5 6 7 8

SW1 Setting Display on LED1,21 2 3 4 5 6 7 8

3

78

3

7 U8

U 1

55OCH612

Check code

0U9

U 1

Diagnosis Remedy

T

7 8

T1

T1

1

T

1

1

ONOFF

1 2 3 4 5 6 7 8

SW1 Setting Display on LED1,2

0–999.9

Unit

V

5OCH612

Check code


TH8

TH8 T H

Diagnosis Remedy

5110

30U5

H

3 0 ] 180 77 5 ] 501 50 ] 17 158 70 ] 819 90 ]

5110 5110

00

TH8

TH8

TH8

57OCH612

Check code


30T

Diagnosis Remedy

50U

U

T

58OCH612

Check code


Diagnosis Remedy

00U8

8 7

1

1

TV 80 380 V 1VCC 15 V C 5

59OCH612

Check code

C

THT 10

10T

1 5 C] 0 C]

37 3 ]17 ] TH T C

C

Diagnosis Remedy

5101U3

C TH

T

C

C TH

TH

C TH

T TH1

1 1 U

99 9 999 9

1 5 7 83

0OCH612

Check code


THT 10 10

10

0 0 ]19 90 ] TH T

C

Diagnosis Remedy

510U

TH

T

C

C TH

TH

C THONOFF

1 2 3 4 5 6 7 8

SW1 Setting Display on LED1,2 Unit

99.9–999.9 ºF

T e ete te te pe at e o TH6 an e isplaye y an ope ation o SW1 on t e o t oo ont olle oa .

61OCH612

Check code


no al i TH3 ete ts to e open s o t.T e open s o t ete tion is isa le ing 10 se on s to 10 in tes.

a te o p esso sta ts, ing e osting ope ation, o o 10 in tes a te et ning o t e e osting ope ation.

Open 40 F 40 ] o lessS o t 194 F 90 ] o o e TH3 T e isto O t oo li i pipe

Dis onne tion o onta t ail e o onne to s C a a te isti e e t o t e isto De e ti e o t oo ont olle oa

Diagnosis o e e ti esa e s e to t n t e po e OFF e o e onne ting is onne ting

any onne to s, o epla ing oa s.

Diagnosis Remedy

5105U4

O t oo li i pipe te pe at e t e isto TH3 open s o t

T e la s a e in i ates a s it position.

SW1 Setting

ONOFF

Display on LED1, 2 Unit

99.9–999.9

41 2 5 6 7 83

F

No

es

es

es

No

No

s t e e any a no ality sas a is onne tion, looseness o

ea age

s t e ete te esistan e no al

s t e ete te te pe at e no al

Conne t t e i ing onne to p ope lyepla e it in ase o a ea age.

epla e t e t e isto .

epla e t e ont olle oaal n tion o t e isto i it .

No a no ality onne to onta t ail e is s spe te .

C e t e i ing an onne to onne tion o TH3.

Dis onne t t e onne to to e t e esistan e o TH3 sing a teste .

C e a te pe at e o TH3.


62OCH612

Check code

5106U4

ient te pe at e t e isto TH7 open s o t


no al i TH7 ete ts to e open s o tOpen 40 F 40:] o lessS o t 194 F 90:] o o e TH7 T e isto ient




Diagnosis RemedyT e la s a e in i ates a s it position.

SW1 Setting

ONOFF


99.9–999.9

41 2 5 6 7 83

F

No

es

es

es

No

No


ea age



Conne t t e i ing onne to p ope ly.epla e it in ase o a ea age.







T e ete te te pe at e o t e isto TH7 an e isplaye y an ope ation o SW1 on t e

o t oo ont olle oa .T e ete te te pe at e o TH7 an e isplaye y an ope ation o SW1 on t e o t oo ont olle oa .

63OCH612

Check code

5109U4

H C pipe te pe at e t e isto TH2 open s o t


no al i TH2 ete ts to e open s o t.Open 40 F 40:] o lessS o t 194 F 90:] o o e TH2 T e isto H C pipe




Diagnosis RemedyT e la s a e in i ates a s it position.

No

es

es

es

No

No


ea age









C e a te pe at e o TH2.ONOFF

1 2 3 4 5 6 7 8


99.9–999.9 ºF


64OCH612

Check code

5110U4

Heat sin te pe at e t e isto TH8 open s o t


no al i TH8 ete ts to e open s o t. Open 31.2 F 35.1 ] o less

S o t 338.5 F 170.3 ] o o e

TH8 T e isto Heat sin




Diagnosis Remedy

o t oo


SW1 Setting

ONOFF


41 2 5 6 7 83F99.9–999.9

No

es

es

es

No

No

es

No


ea age





epla e t e o t oo ont olle oaal n tion o t e isto i it .





T e ete te te pe at e o t e isto TH8 an e isplaye y an ope ation o SW1 on t e

o t oo ont olle oa .T e ete te te pe at e o TH8 an e isplaye y an ope ation o SW1 on t e o t oo ont olle oa .

s it a o el it inte nal t e isto

65OCH612

Check code

5201F5

Hig p ess e senso 63HS t o le


W en t e ete te p ess e in t e ig p ess e senso is 14 S o less ing ope ation, t e o p esso stops ope ation an ente s into an anti esta t o e o 3 in tes. W en t e ete te p ess e is 14 S o less i e iately e o e esta ting, t e o p esso alls into an a no al stop it a e o e 5201 .

Fo 3 in tes a te o p esso esta ting, ing e osting ope ation, an o 3 in tes a te et ning o e osting ope ation, a o e

entione sy pto s a e not ete ine as a no al.

De e ti e ig p ess e senso De ease o inte nal p ess e a se y gas lea age Dis onne tion o onta t ail e o onne to al n tion o inp t i it on o t oo ont olle

oa



Diagnosis Remedy


63HS Hig p ess e senso

SW1 Setting

ONOFF


99.9–999.9 S

41 2 5 6 7 83

No

es

es

No

No


ea age

s t e ete te inte nal p ess e no al

s t e ete te p ess e no al


C e t e e ige ant i it, an e ll e ige ant a te epai ing t e lea age.

epla e t e 63HS.

epla e t e o t oo ont olle oa .

C e t e i ing an onne to onne tion.

C e an inte nal p ess e o t e e ige ant i it.

C e t e ete te p ess e in 63HS , t en o pa e it it t e inte nal p ess e.

T e ete te p ess e in 63HS an e isplaye y an ope ation o SW1 on t e o t oo ont olle oa .

Fo t e p ess e, e e to 8 8.HOW TO CHEC THE CO ONENTS .

66OCH612

Check code

5202F3

Lo p ess e senso 63LS t o le


W en t e ete te p ess e in t e lo p ess e senso is 33 S o less, o 329 S o o e ing ope ation, t e o p esso stops

ope ation it a e o e 5202 . Fo 3 in tes a te o p esso esta ting, ing e osting ope ation, an o 3 in tes a te et ning o e osting ope ation, a o e

entione sy pto s a e not ete ine as a no al.

De e ti e lo p ess e senso De ease o inte nal p ess e a se y gas lea age Dis onne tion o onta t ail e o onne to al n tion o inp t i it on o t oo ont olle

oa



Diagnosis Remedy


63LS Lo p ess e senso

No

es

es

No

No


ea age

s t e ete te inte nal p ess e no al

s t e ete te p ess e no al


C e t e e ige ant i it, an e ll e ige ant a te epai ing t e lea age.

epla e t e 63LS.


C e t e i ing an onne to onne tion.

C e an inte nal p ess e o t e e ige ant i it.

C e t e ete te p ess e in 63LS, t en o pa e it it t e inte nal p ess e. ON

OFF1 2 3 4 5 6 7 8


99.9–999.9 PSIG

T e ete te p ess e in 63LS an e isplaye y an ope ation o SW1 on t e o t oo ont olle oa .

67OCH612

Check code

5300UH

C ent senso t o le o P i a y ent t o le


no al i t e ete te ent senso inp t al e p i a y ent ing o p esso ope ation is o tsi e t e spe i e ange.

De ease t o le o po e s pply oltage Dis onne tion o o p esso i ing Inp t senso t o le on o t oo po e oa



Diagnosis Remedy

No

No

es

es

Does it satis y t e on ition 1 in t e lo e ig t

Is t e e any a no ality s as a is onne tion o looseness

T e po e s pply oltage is e ease o a no al.C e t e po e s pply a ility.

Conne t t e o p esso i ing p ope ly.

epla e t e o t oo po e oaal n tion o ent senso i it .

C e t e inp t ent at t e ti e o a no al stop.

C e t e o p esso i ing o is onne tion o looseness.

Con ition 134 o o e o 10 onse ti e se on s, o 38 o o e.

68OCH612

Check code


no al i 2 o o e nits it t e sa e a ess a e e isting. T e e a e 2 nits o o e it t e sa e a ess in t ei ont olle a ong o t oo nit, in oo nit, F es aste , Lossnay o e ote ont olle Noise inte e en e on in oo o t oo onne to s

Diagnosis o e e ti esa e s e to t n t e po e OFF e o e onne ting is onne ting any onne to s, o epla ing oa s.

Diagnosis Remedy

66000

D ple a ess e o

No

es

es

No

Is t e e any nit it t e sa e a ess

Does it ope ate no ally

Co e t t e a ess, an t n t e po e OFF o in oo o t oo nit, F es aste o Lossnay si ltaneo sly o 2 in tes o

o e, t en t n t e po e a ON.

al n tion o sen ing e ei ing i it on in oo o t oo nit is s spe te .

T e e is no a no ality on t e C nitIt ig t e a se y an e te nal noise, so

e t e t ans ission line to e o e t e a to s .

Sea o a nit it t e sa e a ess as t e so e o a no ality.

T n t e po e a ON.

69OCH612

Check code


no al i t e t ans ission line s o s 1 alt o g t e t ans ission p o esso t ans itte 0 .

t ans itting ata ollision o e e a se o a i ing o o pola ity ange as pe o e ile

t e po e is ON on eit e o t e in oo o t oo nit, F es aste o Lossnay

al n tion o t ans itting i it on t ans ission p o esso

Noise inte e en e on in oo o t oo onne to s


Diagnosis Remedy

66022

T ans ission p o esso a a e e o

es

es

No

No

i ing o as pe o e ile t e po e OFF.


I t e i ing o as pe o e ile t e po e ON, t n t e po e OFF o in ooo t oo nit, F es aste o Lossnay si ltaneo sly o 2 in tes o o e, t en t n t e po e a ON.

epla e t e in oo o t oo ont olle oa .

T e e is no a no ality on t e C nit.It ig t e a se y an e te nal noise, so


T n t e po e a ON.

70OCH612

Check code


O e e o y ollisionno al i no t ans ission stat s a se y a t ans itting ata

ollision is onse ti e o 8 to 10 in tes. no al i a stat s, t at ata is not allo e on t e t ans ission line

e a se o noise an s , is onse ti e o 8 to 10 in tes.

T e t ans ission p o esso is na le to t ans it e to a s o t y le oltage s as noise is i e

on t e t ans ission line. T e t ans ission p o esso is na le to t ans it

e to an in ease o t ans ission ata a o nt a se y a is i ing o t e te inal lo t ans ission line T 3 an t e te inal lo ent ali e ont ol line T 7 on t e o t oo nit.

T e s a e on t ans ission line e o es ig e to a i e t ans ission a se y a al n tion o epeate on t e o t oo nit, i is a n tion to onne t is onne t t ans ission o to ont ol syste an ent ali e ont ol syste .


Diagnosis Remedy

66033

T ans ission s US e o

No

es

es

es

No

No

Is t e t ans ission line is i e

Is t e t ans ission line is i e


Co e t t e i ing, t en t n t e po e a ON.

Co e t t e i ing, t en t n t e po e a ON.

epla e t e in oo o t oo ont olle oa .

T e e is no a no ality on t e C nit.It ig t e a se y an e te nal noise, so e t e t ans ission line to e o e t e a to s .

C e et e t e t ans ission line to t e in oo nit, F es aste , Lossnay o e ote ont olle is is i e to t e te inal lo T 7 on o t oo nit o not.

C e et e t e t ans ission line it t e ot e e ige ant syste o t e in oo nit, F es aste o Lossnay is is i e to t e te inal lo T 3 on o t oo nit o not.

T n t e po e a ON.

is i e

is i e

Not is i e

Not is i e

71OCH612

Check code


no al i t e ata o nit t ans ission p o esso e e not no ally t ans itte .

no al i t e a ess t ans ission o t e nit p o esso as not no ally t ans itte .

i ental ist an e s as noise o lig tning s ge Ha a e al n tion o t ans ission p o esso


Diagnosis Remedy

66066

Signal o ni ation e o it t ans ission p o esso

es

NoDoes it ope ate no ally epla e t e ont olleDe e t o e o so e ont olle .


T n t e po e OFF o in oo o t oo nit, F es aste , Lossnay an e ote ont olle si ltaneo sly

o 2 in tes o o e, t en t n t e po e a ON.

72OCH612

Check code


ep esents a o on e o ete tionn a no ality ete te y t e sen ing si e ont olle en e ei ing

no C o t e e ei ing si e, t o g signal as on e sent. T e sen ing si e sea es t e e o in 30 se on s inte al o 6 ti es ontin o sly.

T e p e io s a ess nit oes not e ist sin e t e a ess s it as ange ile in ele t i ontin ity stat s.

De line o t ans ission oltage signal a se y tole an e o e on t ans ission line

t t e t est en 656 t 200 ]On e ote ont olle line 39 t 12 ]

De line o t ans ission oltage signal e to n at e t ans ission line typesTypes o s iel line CVVS, CPEVS o VVSLine ia ete WG 16 1.25 E]

De line o t ans ission oltage signal e to e essi e n e o onne te nits al n tion e to a i ental ist an e s as noise o lig tning s ge De e t o e o so e ont olle

T e a se o isplaye a ess an att i te is on t e o t oo nit si e.n a no ality ete te y t e in oo nit i e ei ing no C en

t ans itting signal o t e in oo nit to t e o t oo nit.

Conta t ail e o in oo o t oo nit t ans ission line Dis onne tion o t ans ission onne to CN2 on in oo nit al n tion o sen ing e ei ing i it on in ooo t oo nit

T e a se o isplaye a ess an att i te is on t e in oo nit si e.n a no ality ete te y t e e ote ont olle i e ei ing no C

en sen ing ata o t e e ote ont olle to t e in oo nit.

W ile ope ating it lti e ige ant syste in oo nits, an a no ality is ete te en t e in oo nit t ans it signal to t e e ote ont olle ing

t e ot e e ige ant syste o t oo nit is t ne OFF, o it in 2 in tes a te it t ne a ON. Conta t ail e o in oo nit o e ote ont olle t ans ission line Dis onne tion o t ans ission onne to CN2 on in oo nit al n tion o sen ing e ei ing i it on in oo

nit o e ote ont olle

T e a se o t e isplaye a ess an att i te is on t e e ote ont olle si en a no ality ete te y t e in oo nit i e ei ing no C en

t ans itting signal o t e in oo nit to t e e ote ont olle .

W ile ope ating it lti e ige ant syste in oo nits, an a no ality is ete te en t e in oo nit t ans it signal to t e e ote ont olle ing

t e ot e e ige ant syste o t oo nit is t ne OFF, o it in 2 in tes a te it t ne a ON. Conta t ail e o in oo nit o e ote ont olle t ans ission line Dis onne tion o t ans ission onne to CN2 on in oo nit al n tion o sen ing e ei ing i it on in oo

nit o e ote ont olle

66077

No C e oC a t 1 o 4

73OCH612

Check code

66077

No C e o


T e a se o isplaye a ess an att i te is on t e F es aste si e.

n a no ality ete te y t e in oo nit i e ei ing no C en t ans itting signal o t e in oo nit to t e F es aste .

W ile t e in oo nit is ope ating it lti e ige ant syste F es aste , an a no ality

is ete te en t e in oo nit t ans its signal to t e e ote ont olle ile t e o t oo nit it t e sa e e ige ant syste as t e F es aste is t ne OFF, o it in 2 in tes a te it t ne a ON. Conta t ail e o in oo nit o F es aste t ans ission line Dis onne tion o t ans ission onne to CN2 on in oo nit o F es aste al n tion o sen ing e ei ing i it on in oo

nit o F es aste

T e a se o isplaye a ess an att i te is on Lossnay si e.n a no ality ete te y t e in oo nit i e ei ing no C en t e

in oo nit t ans it signal to t e Lossnay.

n a no ality is ete te en t e in oo nit t ans its signal to Lossnay ile t e Lossnay is t ne OFF. W ile t e in oo nit is ope ating it t e ot e e ige ant Lossnay, an a no ality is ete te en

t e in oo nit t ans its signal to t e Lossnay ile t e o t oo nit it t e sa e e ige ant syste as t e Lossnay is t ne OFF, o it in 2 in tes a te it t ne a ON. Conta t ail e o in oo nit o Lossnay t ans ission line Dis onne tion o t ans ission onne to CN2 on in oo nit al n tion o sen ing e ei ing i it on in oo

nit o Lossnay

T e ont olle o isplaye a ess an att i te is not e ogni e . T e p e io s a ess nit oes not e ist sin e t e a ess s it as ange ile in ele t i ontin ity stat s.

n a no ality ete te at t ans itting o t e in oo nit sin e t e F es aste Lossnay a ess a e ange a te syn oni e setting o F es

aste Lossnay y t e e ote ont olle .

C a t 2 o 4

74OCH612

Check code


Diagnosis Remedy

66077

No C e oC a t 3 o 4

es

es

No

No

No

es

es

No

T e t ans ission line is onne te p ope ly.

It is not e ee ing t e tole an e.

C e t e t ans ission line et e it e ee s t e tole an e o not.

C e et e t e o e t in o t ans ission line is se o not.

Co e t it it in t e tole an e, t en pe o t e p o e e 1.

Conne t t e t ans ission line p ope ly, t en pe o t e p o e e 1.

Is t e a no ality ep o e

Is it set p ope ly


Set t e a ess p ope ly, t en pe o t e p o e e 1.

C e t e a ess s it on t e so e o a no ality.

C e t e t ans ission line o a is onne tion an loosenesson t e te inal oa an onne to .



P o e e 1

Contin e to t e ne t page

Fo t e tole an e, e e to t e Installation an al.

75OCH612

Check code


66077

No C e o

Diagnosis Remedy

C a t 4 o 4

es

es

es

es

No

No

No

NoIs t e o e t in o t ans ission line se

Is it ope ating in lti e ige ant syste

Is t e a ess in o ation o e t


W en ope ating in a lti e ige ant syste 2 o o e o t oo nits , e i any o t e in oo nit

sto es non e isting a ess in o ation.

epla e t e ont olle oa i t e isplaye a ess att i te elongs to.

Contin e o t e p e io s page

De e ti e o t oo ont olle oa epeate i it on t e o t oo nit is s spe te .

epla e t e o t oo ont olle oa one y one, t en e o no al ope ation.

Delete t e nne essa y a ess sing a an al setting n tion on t e e ote ont olleOnly o ope ating in a syste it t e

F es aste Lossnay is onne te , o in a lti e ige ant syste it g o p setting is set .

W en ope ating in a single e ige ant syste single in oo nit , t e ont olle o t e isplaye a ess att i te is e e ti e.

pply t e o e t in o t ans ission line, t en pe o t e p o e e 1.

Co plete

76OCH612

Check code

66088


no al i e ei ing no esponse o an ile al ea y e ei e C . T e sen ing si e sea es t e e o in 30 se on s inte al o 6 ti es ontin o sly.

Contin o s ail e o t ans ission e to noise et De line o t ans ission oltage signal a se y tole an e o e on t ans ission line

t t e t est en 656 t 200 ]On e ote ont olle line 39 t 12 ]

De line o t ans ission oltage signal e to n at e t ans ission line typesTypes o s iel line CVVS, CPEVS o VVSLine ia ete WG 16 1.25 E]

i ental al n tion o e o so e ont olle


Diagnosis Remedy

No esponse a e e o

Fo t e tole an e, e e to t e Installation an al.

es

es

es

es

No

No

No

No


T e t ans ission line is onne te p ope ly.

It is not e ee ing t e tole an e.

Is o e t in o t ans ission line se

epla e t e ont olle oaDe e t o t e ont olle i t e isplaye a ess att i te elong to .

Conne t t e t ans ission line p ope ly.

Co e t it it in t e tole an e.

epla e it it t e o e t in o t ans ission line.

T e e is no a no ality on t e C nit.C e t e t ans ission line o t ans ission a e an noise.



C e t e t ans ission line o a is onne tion an loosenesson t e te inal oa an onne to .

C e t e t ans ission line et e it e ee s t e tole an e o not.

C e et e t e o e t in o t ans ission line is se o not.

77OCH612

Check code

6831, 6834E0 E4

o ni ation e ei e e o


Dete te in e ote ont olle o in oo nit W en t e ain o s e ote ont olle annot e ei e signal o in oo nit i as t e 0 a ess. W en t e s e ote ont olle annot e ei e signal. W en t e in oo ont olle oa annot e ei e signal o e ote

ont olle o anot e in oo nit. W en t e in oo ont olle oa annot e e e signal.

Conta t ail e o e ote ont olle i ings I eg la Wi ing

i ing lengt , n e o onne ting e ote ont olle s o in oo nits, o a i ing t i ness oes

not eet t e on itions spe i e in t e apte Ele t i al Wo in t e in oo nit Installation an al.

al n tion o t e e ote ont olle sen inge ei ing i it on in oo nit it t e LED2 is lin ing.

al n tion o t e e ote ont olle sen inge ei ing i it e ote ont olle t ans itting e o a se y noise inte e en e

Diagnosis o e e ti esa e s e to t n t e po e OFF e o e onne ting is onne ting any onne to s, o epla ing oa s

Diagnosis Remedy

C e t e e ote ont olle o ain s setting.

Con t t e e ote Cont olle Diagnosis 2 o o e ti es.

Is C NG isplaye

T n t e po e a ON.

No

Is C 6832 o E C01 – E C66

isplaye

No a no alityIt ig t e a se y an e te nal noise, so

e t e t ans ission line.es

No

es

C a t 1 o 2

No

No

No

es

es

No

es

es

Is t e e o e 6831 o 6834 still

isplaye

Is t e e only 1 e ote ont olle set as t e ain ont olle

Does HO o Please ait isappea it in

6 in tes

Is C O isplaye on all e ote ont olle s

Set one e ote ont olle to ain e ote ont olle , an t e ot e to s .

Dis onne t an e onne t t e onne to CN3 , t en t n t e

po e a ON.

NoteIt ta es 6 se on s at a i

ntil t e es lt is isplaye .


No a no ality onne to o i ing onta t ail e is

s spe te .

epla e t e e ote ont olle .

epla e t e in oo ont olle oa it t e LED2 is lin ing.

78OCH612

Check code


Diagnosis Remedy

6831, 6834E0 E4

o ni ation e ei e e oC a t 2 o 2



No

es

Is the wiring connected properly, meeting the condition?

Conne t t e i ing p ope ly as spe i e in t e apte Ele t i al Wo in t e in oo nit Installation an al.

e e to t e apte Ele t i al Wo .


79OCH612

Check code

C a t 1 o 2

6832, 6833E3 E5

o ni ation sen e o


Dete te in e ote ont olle o in oo nit. T e e a e 2 e ote ont olle s set as ain. al n tion o e ote ont olle sen ing e ei ing

i it al n tion o sen ing e ei ing i it on in oo

ont olle oa e ote ont olle t ans itting e o a se y noise inte e en e


Diagnosis Remedy

C e t e e ote ont olle o ain s setting.

Con t t e e ote Cont olle Diagnosis o e t an 2 ti es.

No

No

Is t e e o e 6832 o 6833 still

isplaye

Is t e e only 1 e ote ont olle set as t e ain ont olle

Set one e ote ont olle to ain e ote ont olle , an t e ot e to s .

Dis onne t an e onne t t e onne to CN3 , t en t n t e

po e a ON.

NoteIt ta es 6 se on s at a i

ntil t e es lt is isplaye .

No a no ality onne to o i ing onta t ail e is

s spe te .

es


Is C NG isplaye

T n t e po e a ON

No

Is C 6832 o E C01 – E C66

isplaye


e t e t ans ission line.es

No

es

No

es

es

NoDoes HO o Please

ait isappea it in 6 in tes

Is C O isplaye on all e ote ont olle s

epla e t e e ote ont olle .

epla e t e in oo ont olle oa it t e LED2 is lin ing.

es

80OCH612

Check code


Diagnosis Remedy

6832, 6833E3 E5

o ni ation sen e oC a t 2 o 2



No

es

Is the wiring connected properly, meeting the condition?

Conne t t e i ing p ope ly as spe i e in t e apte Ele t i al Wo in t e in oo nit Installation an al.

e e to t e apte Ele t i al Wo .


81OCH612

Check code


W en t e total apa ity o onne te in oo nits e ee s t e spe i eapa ity 130 o t e o t oo nit apa ity , a e o e 7100 isisplaye .

T e total apa ity o onne te in oo nits e ee s t e spe i e apa ity. P36 p to o e 32 P48 p to o e 35

T e o el na e o e o t e o t oo nit is egiste e ongly.


Diagnosis Remedy

7100EF

Total apa ity e o

No

es

es

No

No

es

Is it set p ope ly

Is it set p ope ly

Is t e total n e 130 o o t oo nit apa ity

C e t e apa ity o e s it SW2 on t e in oo ont olle oa on t e onne te in oo nit.

C e t e o el sele tion s it SW4 on t e o t oo ont olle oa o t e o t oo nit.

C e t e total apa ity o onne te in oo nits.

Co e t it so t at t e total apa ity oonne te in oo nits is n e 130 o

t e o t oo nit apa ity.

Set t e s it p ope ly.

Set t e s it p ope ly.

o plete

82OCH612

Check code


W en t e apa ity o onne te in oo nit is o e , a e o e 7101 is isplaye .

T e o el na e o onne te in oo nit o el o e is ea as in o pati le.T e onne ta le in oo nits a eP36 to P48 o el P06 to P54 o el o e 4 to 28


Diagnosis Remedy

7101EF

Capa ity o e e o

es

NoIs it set p ope ly Set t e s it p ope ly.

T e o el o e o t e onne te in oo nit an e isplaye y an ope ation o

SW1 on t e o t oo nit.

C e t e o el sele tion s it SW4 on t e in oo ont olle oa o t e onne te in oo nit.

83OCH612

Check code


W en t e onne te in oo nits o an o es e ee t e li it, a e o e 7102 is isplaye .

Conne ting o e in oo nits t an t e li it.no al i onne ting stat s oes not o ply it t e

ollo ing li it Conne ta le p to 7 nits o P36, 10 nits o P48 Conne t at least 1 in oo nit no al i onne te none . Conne ta le only 1 entilation nit


Diagnosis Remedy

7102EF

Conne ting e essi e n e o nits an an o es

es

No

No

es

Is an in oo nit onne te

Does it e ee t e li it

Conne t in oo nit.

Conne t less n e o nits t an t e li it.

T e o el o e o t e onne te in oo nit an e isplaye y an ope ation o

SW1 on t e o t oo nit.

C e et e t e NET line to t e in oo nit is onne te o not.

C e i at least 1 in oo nit is onne te .

C e et e t e onne ting nit an an o e ee s t e li it o not.

84OCH612

Check code


T e a ess setting o o t oo nit o an o is ong. W ongly set a ess o an o

T e o t oo nit is not set in 000, o in t e ange o 51 to 100.


Diagnosis Remedy

7105EF

ess setting e o

<Outdoor unit>

es

NoIs t e a ess setting o e t

Set t e a ess p ope ly, t en t n t e po e OFF o in oo o t oo nit, an o , F es aste , Lossnay, an e ote ont olle si ltaneo sly o 2 in tes o o e, an t n t e po e a ON.


C e et e t e o t oo nit a ess is set in 000, o in t e ange o 51 to 100.

85OCH612

Check code


W en t e onne te in oo nit is not onne ta le it t e o t oo nit, t e o t oo nit ete ts t e e o at sta t p.

Conne ting in oo nit s i is not a t o i e to onne t to t e o t oo nit.


Diagnosis Remedy

7130EF

In o pati le nit o ination e o

NoIs t e in oo nit a t o i e to onne t it t e o t oo nit

epla e t e in oo nit s to t e onne ta le one.

e e to t e se i e an al o t e o t oo nit o t e onne te in oo nit o t e

a t o i e o ination.

es

No

es

C e et e t e o el sele tion s it is set o e tly.

e t ey o e tSet t e o el sele tion s it o e tly, t en esta t.


86OCH612

87

8-2. REMOTE CONTROLLER DIAGNOSISFor the detailed procedure, refer to the remote controller's manuals.

8-3. REMOTE CONTROLLER TROUBLEFor the troubleshooting, refer to the remote controller's manuals.

Even the cooling (heating) operation selection button is pressed, the indoor unit cannot be operated.The auto vane runs freely.

Fan setting changes duringheating.

Fan stops during heating operation.Fan does not stop while operation has been stopped.No setting of fan while start SW has been turned on.

Indoor unit remote controller shows “HO” or “PLEASE WAIT ” indicator for about 2 minutes when turning ON power supply.Drain pump does not stopwhile unit has been stopped.Drain pump continues to operate while unit has been stopped.

"Cooling (Heating)" blinks

Normal display

Normal display

"Defrost "

Light out

STAND BY

“HO” blinks“PLEASE WAIT” blinks

Light out

—

The indoor unit can not cool (Heat) if other indoor units are heating(Cooling).

Because of the control operation of auto vane, it may change overto horizontal blow automatically from the downward blow in cooling in cause the downward blow operation has been continued for 1 hour. At defrosting in heating, hot adjusting and thermostat OFF, it automatically changes over to horizontal blow.Ultra-low speed operation is commenced at thermostat OFF.Light air automatically change over to set value by time or piping temperature at thermostat ON.The fan is to stop during defrosting.

Fan is to run for 1 minute after stopping to exhaust residual heat (only in heating).Ultra-low speed operation for 5 minutes after SW ON or until piping temperature becomes 35°C. There low speed operate for 2 minutes, and then set notch is commenced. (Hot adjust control)System is being driven.Operate remote controller again after “HO” or “PLEASE WAIT”disappears.

After a stop of cooling operation, unit continues to operate drain pump for 3 minutes and then stops it.Unit continues to operate drain pump if drainage is generated, even during a stop.

Symptom Display of remote controller CAUSE

8-4. THE FOLLOWING SYMPTOM DO NOT REPRESENT TROUBLE (EMERGENCY)

OCH612

88

8-5. INTERNAL SWITCH FUNCTION TABLEPUMY-P36/48NKMU1(-BS)

Sw

itch

Step

Func

tion

Ope

ratio

n in

Eac

h S

witc

h S

ettin

gR

emar

ksP

urpo

seA

dditi

onal

Info

rmat

ion

ON

OFF

Whe

n to

Set

SW

U1

ones

dig

itS

WU

2 te

ns d

igit

Rotary switchB

efor

e tu

rnin

gth

e po

wer

ON

<Ini

tial s

ettin

gs>

SW

1 D

igita

lD

ispl

ayS

witc

h1–

8Ca

n be s

et eit

her d

uring

op

erati

on or

not.

<Ini

tial s

ettin

gs>

SW

2Fu

nctio

nS

witc

h

1S

elec

ts o

pera

ting

syst

em s

tartu

pW

ith ce

ntrali

zed

contr

oller

Witho

ut cen

tralize

dcon

troller

Bef

ore

turn

ing

the

pow

er O

N<I

nitia

l set

tings

>Tu

rn O

N wh

en th

e cen

traliz

ed co

ntroll

er is

co

nnec

ted to

the o

utdoo

r unit

.

SW2-1

must

be tu

rned O

N if a

centr

al con

troller

is c

onne

cted t

o the

syste

m. An

exam

ple of

this

would

be a T

C-24,

EW-50

A, AG

150, A

E50 o

r AE

200.

If SW2

-1 is n

ot tur

ned o

n, wh

ile usi

ng

a cen

tral co

ntrolle

r, in ra

re circ

umsta

nces

proble

ms m

ay be

encou

ntered

such

as ind

oor

units

not re

spond

ing to

grou

p com

mand

s. Th

erefor

e, tur

ning S

W2-1

ON is

recom

mend

ed

if a ce

ntral c

ontro

ller is

used.

2Co

nnec

tion

Info

rmat

ion

Clea

r Swi

tch

Cle

arD

o no

t cle

arW

hen r

eloca

ting u

nits o

r con

necti

ng ad

dition

al un

its.

—

3A

bnor

mal

dat

a cl

ear s

witc

h in

put

Clea

r ab

norm

al da

taN

orm

alOF

F to O

N an

y tim

e afte

r the

powe

r is tu

rned o

n.To

del

ete

an e

rror

his

tory

.

4P

ump

dow

nR

un

adju

stm

ent

mod

eN

orm

alD

urin

g co

mpr

esso

rru

nnin

g

To fa

cilitat

e outd

oor u

nit th

e pum

ping d

own o

perat

ion.

Frequ

ency

= Fix

ed to

65 H

zInd

oor-e

lectro

nic ex

pans

ion va

lve =

Fully

open

Outdo

or fan

step

= Fix

ed to

10

Please

refer t

o a se

ction re

ferring

to the

pump

ing

down o

n outd

oor un

its Ins

tallatio

n Manu

als.

It migh

t not be

possi

ble to

collec

t all th

e refrig

erant

if the a

mount

is exc

essive

.

SW

2-5,

6/

SW

4/S

W8

Mod

elS

witc

h

1–6

MO

DE

L S

ELE

CTI

ON

1:O

N 0

:OFF

Bef

ore

the

pow

eris

turn

ed O

N.

<Ini

tial s

ettin

gs>

Set

for e

ach

capa

city

.—

—

SW

3 Tr

ial

oper

atio

n1

ON

/OFF

from

out

door

uni

tO

NO

FFAn

y tim

e afte

r the

powe

r is tu

rned

ON.

<Ini

tial s

ettin

gs>

——

2M

ode

setti

ngH

eatin

gC

oolin

g—

—

SW

5Fu

nctio

nsw

itch

1De

mand

contr

ol se

tting f

or A

ustra

lia

Austr

alia s

etting

Nor

mal

Can

be

set w

hen

off o

r dur

ing

oper

atio

n

<Ini

tial s

ettin

gs>

Turn

ON

to ac

tivate

the d

eman

d con

trol fo

r Au

strali

a.(D

o not

turn t

his O

N if t

he un

it is i

n ou

tside

Aus

tralia

)

2C

hang

e th

e in

door

uni

t's L

EV

op

enin

g at

sta

rt-up

Ena

ble

Nor

mal

To set

the LE

V open

ing at

start-u

p high

er than

usual

.(+1

50 pul

ses)

To imp

rove th

e oper

ation w

ith the

LEV a

lmost c

logged

.Th

e refr

igera

nt fl o

w no

ise at

star

t-up

beco

me lo

uder.

3—

——

——

4A

uxili

ary

heat

erE

nabl

eD

isab

leB

efor

e th

e po

wer

is tu

rned

ON

.Tu

rn ON

when

an au

xiliary

heate

r is co

nnec

ted. (I

t tra

nsmi

ts a c

onne

ction p

ermiss

ion sig

nal o

f the a

uxilia

ry he

ater to

the c

onne

cted C

ITY M

ULTI

indoo

r unit

.)Tu

rn O

N on

ly wh

en th

e aux

iliary

heate

r is co

nnec

ted an

d ope

rated

.

5C

hang

e th

e in

door

uni

t's L

EV

op

enin

g at

def

rost

Ena

ble

Nor

mal

Can

be

set w

hen

OFF

or d

urin

g op

erat

ion

To se

t the L

EV op

ening

high

er th

an us

ual

durin

g defr

ostin

g ope

ratio

n.(O

nly Q

j [ 10

is va

lid, +

300 p

ulses

)To

avoid

the d

ischa

rge t

empe

ratur

e inc

reas

e an

d pro

vide e

ffi cien

t defr

ostin

g ope

ratio

n.

The r

efrige

rant

fl ow

noise

durin

g the

defro

sting

oper

ation

beco

mes

loude

r.

6S

witc

hing

the

targ

et s

ub c

ool

(Hea

ting

mod

e)E

nabl

eN

orm

alTo

decre

ase t

he ta

rget

sub c

ool v

alue.

To re

duce

the d

ischa

rge t

empe

ratur

e de

creas

e due

to re

friger

ant li

quid

accu

mulat

ion in

the u

nits.

A re

friger

ant fl

ow no

ise m

ight b

e ge

nera

ted if

the su

b coo

l valu

e is

too sm

all.

The black square (■) indicates a switch position.

1

ON

OFF

23

45

67

8

SW

U2

(tens

dig

it)

01 2 3 4

56789

SW

U1

(one

s di

git)

01 2 3 4

56789

1

ON

OFF

23

45

6

SW

U2

(tens

dig

it)

01 2 3 4

56789

SW

U1

(one

s di

git)

01 2 3 4

56789

1

ON

OFF

23

4

1

ON

OFF

2

1

ON

OFF

23

45

67

8

Continue to the next pageOCH612

89

Sw

itch

Step

Func

tion

Ope

ratio

n in

Eac

h S

witc

h S

ettin

gR

emar

ksP

urpo

seA

dditi

onal

Info

rmat

ion

ONOF

FW

hen t

o Set

SW

5Fu

nctio

nsw

itch

7Du

ring t

he ou

tdoor

unit i

s in H

EAT

opera

tion,

addit

ionall

y inc

rease

abou

t 50

to 70

pulse

s of th

e LEV

open

ing on

the

indoo

r unit

whic

h is i

n FAN

, STO

P, CO

OL

or the

rmo-O

FF*1

.

Activ

e Ina

ctive

Can b

e set

when

OF

F or

durin

g op

erati

on

To ad

dition

ally i

ncrea

se ab

out 5

0 to 7

0 puls

es of

the L

EV

open

ing fo

r unit

s othe

r tha

n in H

EAT

opera

tion.

To av

oid

a ref

rigera

nt sh

ortag

e (le

ss ca

pacit

y) du

e to

refrig

erant

liquid

accu

mulat

ion in

the u

nits w

hich i

s not

in op

eratio

n.

A re

frige

rant

fl ow

noi

se m

ight

be

gene

rate

d in

uni

ts o

ther

than

the

one

in o

pera

tion.

8Du

ring t

he ou

tdoor

unit i

s in o

pera

tion,

fully

close

s the

elec

tronic

expa

nsion

va

lve on

the i

ndoo

r unit

whic

h is i

n FA

N, C

OOL,

STOP

, or t

herm

o-OF

F.*2

Enab

leNo

rmal

Befor

e tur

ning t

he

powe

r ON.

To re

duce

the

room

temp

eratu

re in

creas

e by

settin

g the

LEV

ope

ning

lower

for t

he u

nits

in the

rmo-

OFF

oper

ation

.

The r

efrige

rant

is mo

re lik

ely to

colle

ct in

the un

its w

ith

therm

o-OF

F op

erati

on, a

nd ca

using

the u

nits r

efrige

rant

shor

tage.

(Res

ults i

n les

s cap

acity

and i

ncre

ase o

f dis

char

ge te

mper

ature

.)

SW

6Fu

nctio

nsw

itch

1—

——

—<I

nitia

l set

tings

>—

—2

——

——

——

3—

——

——

—

4C

hang

e of

def

rost

ing

cont

rol

Enab

le(Fo

r high

hu

midit

y)No

rmal

Can

be

set

whe

n O

FF

or d

urin

g op

erat

ion

To sh

orten

the d

efros

ting p

rohib

ition t

ime i

n high

hu

midit

y (or

heav

y sno

w) re

gion,

in or

der t

o red

uce

malfu

nctio

ns ca

used

by fr

ost .

The p

erform

ance

of th

e HEA

T ope

ration

is so

mewh

at red

uced

sinc

e the

defro

sting

opera

tion i

s freq

uentl

y pe

rform

ed.

5—

——

——

6S

witc

hing

the

targ

et d

isch

arge

pres

sure

(Pdm

)En

able

Norm

alTo

raise

the p

erfor

manc

e by s

etting

the P

dm hi

gher

du

ring H

EAT

oper

ation

.Po

wer co

nsump

tion is

raised

due to

a high

er fre

quency

. (The

perfor

mance

would

not be

raise

at the

maxim

um op

erating

freque

ncy.)

7Sw

itchin

g (1)

the t

arge

t eva

pora

tion

tempe

ratur

e (ET

m)En

able

Norm

alTo

raise/re

duce th

e perfo

rmance

by ch

anging

the tar

get ET

m durin

g COO

L ope

ration.

Switch

to rais

e the p

erforma

nce: ra

ises th

e perfo

rmance

Switch

to red

uce the

perfor

mance

: preve

nts de

w cond

ensatio

n

Switc

hing i

t to ra

ise th

e per

forma

nce,

it rais

es th

e pow

er

cons

umpti

on, a

nd pr

oduc

es m

ore d

ew co

nden

satio

n.Sw

itchin

g it to

redu

ce th

e perf

orman

ce, it

mak

es th

e pe

rform

ance

insu

ffi cien

t.8

Switc

hing (

2) th

e tar

get e

vapo

ratio

ntem

pera

ture (

ETm)

Enab

leNo

rmal

SW

7Fu

nctio

nsw

itch

1Ig

nore

cur

rent

sen

sor

abno

rmal

ityEn

able

Norm

alA

fter t

urni

ng

the

pow

er O

N.

<Ini

tial s

ettin

gs>

To pe

rform

a tes

t run

for e

lectric

al pa

rts al

one w

ithou

t ru

nning

the c

ompr

esso

r. Ma

ke sur

e to co

nnect t

he con

nectors

to the

comp

ressor

after c

hecking

the ele

ctrical

parts.B

e care

ful not

to get

electri

cal sho

ck while

workin

g on e

lectrica

l parts.

2S

ettin

g to

ene

rgiz

e th

e fre

eze

stat

hea

ter (

optio

nal p

art)

Dur

ing

heat

ing

oper

atio

n on

ly*3

Includ

e wh

en th

e he

ating

op

erati

on is

OF

F. *4

Can

be

set w

hen

OFF

or d

urin

g op

erat

ion

It red

uces

snow

on th

e bas

e, ev

en it

blows

insid

e the

un

it, by

settin

g the

base

heate

r ON

while

the H

EAT

oper

ation

is st

oppe

d.Po

wer c

onsu

mptio

n rais

es w

hile t

he op

erati

on is

sto

pped

.

3H

igh

heat

ing

perfo

rman

ce

mod

eEn

able

Norm

alA

nytim

eTo

rais

e th

e pe

rform

ance

of H

EAT

op

erat

ion

if it

is in

suffi

cien

t.Th

e perf

orman

ce m

ay no

t be r

aised

depe

nding

on th

e cap

acity

of

indoo

r unit

s in o

perat

ion, o

r outs

ide ai

r temp

eratur

e.

4M

axim

um fr

eque

ncy

dow

n at

1

hour

afte

r CO

OL

oper

atio

nEn

able

Norm

alCa

n be s

et wh

en

OFF

or du

ring

oper

ation

To re

duce

dew

cond

ensa

tion o

n the

indo

or un

it by

lower

ing th

e fre

quen

cy.

The p

erfor

manc

e migh

t be i

nsuffi

cien

t.

5S

imul

tane

ous

cool

ing

and

heat

ing

with

ext

erna

l hea

ter

Enab

leDi

sable

Anyti

meTh

e sim

ulta

neou

s op

erat

ion

of c

oolin

g an

d he

atin

g wi

ll be

poss

ible

by

inst

allin

g an

ext

erna

l he

ater

to th

e CI

TY M

ULTI

indo

or u

nit.

For t

he in

stal

latio

n of

ext

erna

l hea

ter a

nd

the

indo

or u

nit s

ettin

g, re

fer t

o th

e in

door

un

it se

rvic

e m

anua

l.

6M

anua

l def

rost

Manu

al de

frost

Norm

alDu

ring c

ompre

ssor

runnin

g in H

EAT

mode

.

Turn

ON

when

it is

nece

ssar

y to p

erfor

m the

defro

sting

op

erati

on fo

rcedly

. (Effe

ctive

only

at sta

rt-up

, or 1

0 mi

nutes

after

the l

ast d

efros

ting o

pera

tion)

It per

forms

the d

efros

ting o

pera

tion f

orce

dly.

(HEA

T op

erati

on is

stop

ped t

empo

rarily

.)

SW

9Fu

nctio

nS

witc

h

1Au

to c

hang

e ov

er fr

om re

mot

e co

ntro

ller (

IC w

ith th

e mini

mum

addre

ss)

Enab

leDi

sable

Befor

e tur

ning t

he

powe

r ON

<Ini

tial s

ettin

gs>

Enab

les th

e ind

oor u

nit w

ith th

e mini

mum

addr

ess

to se

lect A

UTO

mode

, and

switc

hes t

he op

erati

on

mode

of th

e othe

r indo

or un

its to

the s

ame m

ode.

Can

not b

e se

t whe

n th

e ce

ntra

lized

con

trol

is O

N.

2Sw

itchi

ng th

e Si

lent

/ Dem

and

mod

eDe

mand

co

ntrol

Silen

t mo

deCa

n be s

et wh

en

OFF

or du

ring

oper

ation

—Ab

out th

e Sile

nt mo

de/D

eman

d con

trol s

etting

, refer

to

"8-10

. OUT

DOOR

UNI

T INP

UT/O

UTPU

T CON

NECT

OR".

3—

——

——

—4

——

——

——

*1

SW

5-7

Ope

ns th

e in

door

- ele

ctro

nic e

xpan

sion

valve

as

a co

unte

rmea

sure

aga

inst

the

indo

or u

nit i

n FA

N, C

OO

L, S

TOP,

or t

herm

o-O

FF o

pera

tion

with

refri

gera

nt-s

horta

ge s

tatu

s du

e to

an

accu

mul

atio

n of

liqui

d re

frige

rant

in th

e in

door

uni

t.

*2 S

W5-

8 C

ount

erm

easu

re a

gain

st ro

om te

mpe

ratu

re ri

se fo

r ind

oor u

nit i

n FA

N, C

OO

L, a

nd th

erm

o-O

FF (h

eatin

g) m

ode.

*3

Dur

ing

heat

ing

oper

atio

n an

d th

e am

bien

t tem

pera

ture

is 4:

or b

elow

, the

free

ze p

reve

ntio

n he

ater

is e

nerg

ized

.

*4 D

urin

g he

atin

g m

ode

is O

FF (i

nclu

de th

erm

o-O

FF in

coo

ling

mod

e), a

nd th

e am

bien

t tem

pera

ture

is 4:

or b

elow

, the

free

ze p

reve

ntio

n he

ater

is e

nerg

ized

.

SW

6-6

OFF

ON

Targe

t Pdm

(kg/c

m²)

31.5

33.5

SW

6-7

OFF

ON

OFF

ON

SW

6-8

OFF

OFF

ON

ON

Targ

et E

Tm (:

)9

116

14

1

ON

OFF

23

45

67

8

<Ini

tial s

ettin

gs>

1

ON

OFF

23

45

67

8

1

ON

OFF

23

45

6

1

ON

OFF

23

4

OCH612

90

CN51

X

543

A C

D

5E

1

1

3

B

G

Y

L1: Error display lampL2: Compressor operation lampX, Y: Relay (Coil standard of 0.9W or less for 12 V DC)

F

A C

D

E

B

GF

CN3NX

Y

SW1

SW2

123

X, Y: Relay (1 mA DC)

SW1SW2

ONHeating

Validity of SW1

OFFCooling

Invalidity of SW1

1

3

A C

D

E

B

GF

CN3DX

Y

SW1

SW2

123

The silent mode and the demand control are selected by switching the DIP switch 9-2 on outdoor controller board.It is possible to set it to the following power consumption (compared with ratings) by setting SW1, 2.

Silent mode Silent mode operationOutdoor controller board DIP SW9-2 SW1 SW2 Function

Demand controlOFFON

ONOFFON

—OFFOFF

ONOFF

ONON

100% 75%50%0%

(Normal)

(Stop)

A Distant control boardB Relay circuitC External output adapter (PAC-SA88HA-E)D Outdoor unit control board

A Remote control panelB Relay circuitC External input adapter (PAC-SC36NA-E)D Outdoor unit control board

E Relay power supplyF Procure locallyG Max. 10 m

A Remote control panelB Relay circuitC External input adapter (PAC-SC36NA-E)D Outdoor unit control board

E Relay power supplyF Procure locallyG Max. 10 m

E Lamp power supplyF Procure locallyG Max. 10m

~

~

YX

Y

X

~

Y

X

L1

L2

8-6. OUTDOOR UNIT INPUT/OUTPUT CONNECTOR State (CN51)

Auto change over (CN3N)

Silent Mode/Demand Control (CN3D)

OCH612

91

M 12345

MRed

Blue

Orange

YellowWhite

Parts name Check points

Disconnect the connector then measure the resistance with a tester. (At the ambient temperature 10 to 30:)

Thermistor (TH3)<Outdoor liquid pipe>Thermistor (TH4)<Compressor> Thermistor (TH6)<Suction pipe>Thermistor (TH7)<Ambient> Thermistor (TH8)<Heat sink>

Normal160 to 410 k"

4.3 to 9.6 k"

39 to 105 k"

TH4TH2TH3TH6TH7

TH8*

Abnormal

Open or short

Measure the resistance between the terminals with a tester. (At the ambient temperature 20:)

Solenoid valve coil<4-way valve> (21S4)

Motor for compressor(MC)

Measure the resistance between the terminals with a tester.(At the ambient temperature 20:)

Normal1197 ± 10 "

AbnormalOpen or short

Solenoid valve coil<Bypass valve> (SV1)

Linear expansion Valve(LEV A)

Linear expansion Valve(LEV B)

Measure the resistance between the terminals with a tester. (Winding temperature 20:)

W

V

U

* TH8 is internal thermistor of power module. (Y)

Normal1567.5 ± 156.8 "

1.1 ± 0.05 M" 40 ± 4 k" 220 ± 22 k" Open


Normal

0.305 ± 0.015 "


Normal

Gray - Black Gray - Red Gray - Yellow Gray - Orange

Abnormal

46 ± 3 "Open or short

Normal

Red - White Red - Orange Red - Yellow Red - Blue

Abnormal

46 ± 4 "Open or short

Normal

Red - Blue Brown - Blue Orange - Blue White - Blue

Abnormal

Thermistor (TH2)<Hic pipe>

12345

MGray

Orange

Red

YellowBlack

Red

BlueBrownOrangeWhite

Measure the resistance between the conector pins with a tester.(At the ambient temperature 20:)

Fan motor (MF1, MF2)

M

1234567

Open or short(Short, for White - Blue)

8-7. HOW TO CHECK THE PARTSPUMY-P36/48NKMU1(-BS)

OCH612

92

Notes1. High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service.2. Do not pull out the connector (CNF1, 2) for the motor with the power supply on. (It causes trouble of the outdoor multi controller circuit board and fan motor.)Self checkSymptom : The outdoor fan can not turn around.

1

2

Check method of DC fan motor (fan motor / outdoor multi controller circuit board)

Power supply check(Remove the connector (CNF1, 2))Measure the voltage in the outdoor multi controller circuit board.TEST POINT 1 : VDC (between 1 (+) and 4 (-) of the fan connector): VDC 290–330 V DC(When PAM stops), 350 V DC (When PAM is operating)TEST POINT 2 : VCC (between 5 (+) and 4 (-) of the fan connector): VCC 15 V DC

No

NG

NG

Wiring contact checkContact of fan motor connector (CNF1, 2)

Fuse checkCheck the fuse (F500) on outdoorcontroller board.

Recover wiring.

Replace outdoor multi controller circuit board.

Replace the fan motor.

Replace outdoor multi controller circuitboard (MULTI.B.) and the defectivefan motor .

Replace outdoor multi controller circuit board.

Replace the fan motor.

Is the voltage normal?

Is there contact failure? Yes

Yes

No

Did the fuse blow?

No

Yes

Check the operation of fan. END

Yes OK

Check the operation. END

OK

Disconnect the FAN motor connector and measure the resistance of connector pins.Refer to “8-7. HOW TO CHECK THE PARTS”.

Inverterdriver

Ground

power supply (inverter drive)

power supply (gate drive)

rotation signal control voltage

7654--1

3-1

CNF1

15 V DC0–6.5 V DC0–15 V DC pulse

Motor

TESTS POINT VDC

TESTS POINT Vcc

CHECK POINT

+290–350 V DC

TESTS POINT VspPC511C515

TESTS POINT VFG

C82A

TESTS POINT VspTESTS POINT VFG

TESTS POINT Vcc

CHECK POINT

Inverterdriver

Ground

power supply (inverter drive)

power supply (gate drive)

rotation signal control voltage

7654--1

0–6.5 V DC0–15 V DC pulse

Motor

TESTS POINT VDC

TESTS POINT VspPC512C516

15 V DC TESTS POINT VocC82A

TESTS POINT VFG

TESTS POINT Vsp

TESTS POINT VFG

TESTS POINT Vcc

CHECK POINT

3-1

Multi controller circuit board

Power board

CNDCC510 F500 CNDC

CNF2

FAN MOTOR (MF1)

FAN MOTOR (MF2)

· The inverter control P.C. board is built in the fan motor of this outdoor unit.· When F500 that is on multi controller board is blown, change the defective fan motor and multi controller board at the same

time (F500 is impossisble to change).· For outdoor unit, there are 2 fan motors (up and down; MF1/MF2), it is possible to connect to either CNF1 or CNF2 on the

board.· It is abnormal when the abnormality is detected from either both fan motors or only one side.

OCH612

93

Check method of multi controller circuit board

Normal

LED1 LED2

Fuse checkCheck the fuse on multi controller circuit board

Did the fuse (F500) blow? Replace multi controller circuit board and the defective fan motor. See DC fan check.

Did the fuse (F1 and F2) blow? Check the SV1, SV2, SS and 21S4 and wiring.

7seg LED is lit?(SW1: all off)

290 to 350 V DC?

Check wiring. Replace multi controller circuit board.

Check the breaker and main incoming power. Check power board. Check wiring.

Check the voltage from the power circuit board to CNDC (PNK) connector.

No

No

Yes(lit)

No (No lit)

Yes

No

Multi controller circuit board check

Yes (blow)

Yes (blow)

CNDC (PNK)

Power circuit board

3

1

CNDC(PNK)

CNAC2(RED)

NoiseFilterCircuit

Conv.Circuit


290–350 V DC

208/230 V AC±10%

208/230 V AC

TB1

±10%

CNAC (RED)F1F2

F500

1

3

LI NI

L1 L2

Disconnect the FAN motor connector and measure the resistance of connector pins.Refer to “8-7. HOW TO CHECK THE PARTS”.

OCH612

94

Check method of power circuit board

Is the voltage of main incoming power208/230 V AC ±10%? Check the breaker and power supply.

Is the voltage of CNAC (RED) on multi controller circuit board

208/230 V AC ±10%?

Check wiring. Replace power circuit board.

Is the voltage of CNDC(PNK) on multiboard 290–350 V DC?

Check wiring. Check power circuit board. Retry after the temperature of the PTC1,2 drops to 257°F[125°C] or less

Note: To check the voltage of the parts on this board with a tester is difficult due to its location. Test points are limited.

Yes

Yes

Yes

Yes

No

No

No

No

Is the voltage between M1 and M2 onTB3 (M-NET transmission) 24–30 V DC?

Check wiring. Check M-NET power circuit board.

No

Turn off the incoming power supplyand check the resistance of PTC1,2 on

the Power circuit board.

PTC1,2 = open ?

Yes (open)

Replace Noise filter board and check52C-relay,wiring,power circuit board .

Check wiring. Check model setting switch SW4 on the multi controller board. Replace power board.

No(normal)

Power circuit board check

Normal

Yes

Is the voltage of the compressor(U-V, U-W and V-W) balanced?

1

3

CNAC(RED)

1

Multi controllercircuit board

M-NET powercircuit board

52C(relay)

PTCs

208/230 V


CN2 (RED)

CN52 (RED)

13V

GND

16V16V

GND(16V)GND(18V)

18V

SignalsSignals

7654321

1

3

52C relaydrive signal

Power supply for Inverter gate drivePower supply for PAM gate drive

L1

L2

TB1 208/230 V AC10%

3

5CN1

(WHT)

COMP

U-V 10–180 V ACV-W 10–180 V ACW-U 10–180 V AC

208/230 V

CNDC(PNK)

290–350 V DC

GND

1

3

Power supply formulti controller circuit board

Power supply

52C relay

Bus bar voltage(DC)

COMP (Hz)

PAM OFF

OFFON

OFFON

0Hz

ex. 48 Hz

0V

290/325 V330–350 V

ON

208/230 V

min Hz

290/325 V

OFF

TIME CHART

power on starts stop

OCH612

95

Check method of M-NET power circuit board

Normal

24–30 V DC?

Correct the short circuit point on the M-NET transmission line.

24–30 V DC?

Is the incoming main voltage208/230 V AC ±10%?

Check wiring. Replace M-NET power circuit board.

Check breaker and incoming power supply. Check power circuit board. Check wiring.

Check the voltage between M1 and M2 on thetransmission terminal block TB3.

Disconnect the branch box - outdoor transmission wiringfrom the terminal block TB3 , and check the voltage

between M1 and M2 on TB3 again.

*To check the voltage of the parts on this board with a tester is difficult due to its location. Test points are limited.

No

Yes(24–30 V DC ) No

Yes(208–230 V AC )

NoYes(24–30 V DC )

M-NET power circuit board check

Power circuit board

1

3

CNAC1(WHT)


M1 M2

CNS1(RED)

2 1 CN102(WHT)

TB3

4 3 2 1208/230 V AC±10%

NI

LI

208/230 V AC±10%

CN1

CN224–30 V DC

24–30 V DC (Non-polar)

To branch box

M-NET power circuit board

L2

L1

TB1

OCH612

96

8-8. HOW TO CHECK THE COMPONENTS<Thermistor feature chart>Low temperature thermistors

• Thermistor <Hic pipe> (TH2)• Thermistor <Outdoor liquid pipe> (TH3)• Thermistor <Suction pipe> (TH6)• Thermistor <Ambient> (TH7)

32°F [0:] 15 k"50°F [10:] 9.6 k"68°F [20:] 6.3 k"77°F [25:] 5.2 k"

86°F [30:] 4.3 k"104°F [40:] 3.0 k"

Thermistor R0 = 15 k" ± 3 %B constant = 3480 ± 2 %

Rt =15exp{3480( 273+t – 273 )}1 1

Thermistor R120 = 7.465 k" ± 2 %B constant = 4057 ± 2 %

Rt =7.465exp{4057( 273+t – 393)}1 1

68°F [20:] 250 k" 86°F [30:] 160 k"104°F [40:] 104 k"122°F [50:] 70 k"140°F [60:] 48 k"

158°F [70:] 34 k" 176°F [80:] 24 k" 194°F [90:] 17.5 k"212°F [100:] 13.0 k"230°F [110:] 9.8 k"

High temperature thermistor

• Thermistor <Compressor> (TH4)

0

10

20

30

40

50

20 10 0 10 20 30 40 504 14 32 50 68 86 104122

Temperature (:)Temperature (ºF)

Res

ista

nce

(k"

)

500

400

300

200

100

0

25 50 75 100 12077 122 167 212 248

Temperature (ºF)Temperature (:)

Res

ista

nce

(k"

)

OCH612

97

Comparing the Low Pressure Sensor Measurement and Gauge PressureBy configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the low pressure sensor appears on the LED1 on the control board.

(1) While the outdoor unit is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1, 2.1) When the gauge pressure is between 0 and 14 PSIG [0.098 MPaG], internal pressure is caused due to gas leak. 2) When the pressure displayed on self-diagnosis LED1, 2 is between 0 and 14 PSIG [0.098 MPaG], the connector may be defective or

be disconnected. Check the connector and go to (4). 3)

4) If other than 1), 2) or 3), compare the pressures while the sensor is running. Go to (2).(2) Compare the gauge pressure and the pressure displayed on self-diagnosis LED1, 2 after 15 minutes have passed since

the start of operation. (Com pare them by PSIG [MPaG] unit.)1) When the difference between both pressures is within 29 PSIG [ 0.2MPaG], both the low pressure sensor and the control board are normal.2) When the difference between both pressures exceeds 29 PSIG [ 0.2MPaG], the low pressure sensor has a problem. (performance dete-

rioration) 3) When the pressure displayed on the self-diagnosis LED1, 2 does not change, the low pressure sensor has a problem.(3) Remove the low pressure sensor from the control board to check the pressure with the self-diagnosis LED1, 2 display.1) When the pressure displayed on the self-diagnosis LED1,2 is between 0 and 14 PSIG [0.098 MPaG], the low pressure sensor has a

problem.2) When the pressure displayed on self-diagnosis LED1, 2 is approximately 247 PSIG [1.7 MPaG], the control board has a problem.

(4) Remove the low pressure sensor from the control board, and short-circuit between the pin 2 and pin 3 connectors (63LS) to check the pressure with the self-diagnosis LED1, 2.

1) When the pressure displayed on the self-diagnosis LED1, 2 exceeds 247 PSIG [1.7 MPaG], the low pressure sensor has a problem. 2) If other than 1), the control board has a problem.(5) Remove the high pressure sensor (63HS) from the control board, and insert it into the connector for the low pres-

sure sensor (63LS) to check the pressure with the self-diagnosis LED1, 2.1) When the pressure displayed on the self-diagnosis LED1, 2 exceeds 247 PSIG [1.7 MPaG], the control board has a problem. 2) If other than 1), go to (2).

Low Pressure Sensor Configuration (63LS)The low pressure sensor consists of the circuit shown in the figure below. If 5 V DC is applied between the red and the black wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltagewill be converted by the microcomputer. The output voltage is 0.173 V per 14 PSIG [0.098 MPaG].

The pressure sensor on the body side is designed to connect to the connector. The connector pin number on the body side is different from that on the control board side.

SW1ON

1 2 3 4 5 6 7 8

ON

1 2 3 4 5 6 7 8

The figure at left shows that the switches 1 through 4 are set to ON and 5 through 8 are set to OFF.

Body side Control board side

Vcc Pin 1 Pin 3

Vout Pin 2 Pin 2

GND Pin 3 Pin 1

Note:

0.5

0.85 1.7

2.5

3.5

Vout (V)

PRESSURE (PSI)(MPa)

3

2

1

RED

WHT

BLKSE

NS

OR

5 V DC

GND63LS

Vout MICROPROCESSOR

3–1 : 5 V (DC)2–1 : Output Vout (DC)

OUTDOOR MULTI CONTROLLER CIRCUIT BOARD

Pressure: 0–247 PSIG [1.7 MPaG]Vout: 0.5–3.5 V0.173 V/14 PSIG [0.098 MPa]

<LOW PRESSURE SENSOR>

123 247

When the outdoor temperature is 86°F [30°C] or less, and the pressure displayed on self-diagnosis LED1, 2 exceeds 247 PSIG [1.7 MPaG], go to (3). When the outdoor temperature exceeds 86°F [30°C], and the pressure displayed on self-diagnosis LED1, 2 exceeds 247 PSIG [1.7 MPaG], go to (5).

OCH612

98

Comparing the High Pressure Sensor Measurement and Gauge Pressure

By configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the high pressure sensor appears on the LED1, 2 on the control board.

(1) While the outdoor unit is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1, 2.1) When the gauge pressure is between 0 and 14 PSIG [0.098 MPaG], internal pressure is caused due to gas leak. 2) When the pressure displayed on self-diagnosis LED1, 2 is between 14 PSIG [0.098 MPaG], the connector may be defective or

be disconnected. Check the connector and go to (4). 3) When the pressure displayed on self-diagnosis LED1, 2 exceeds 725 PSIG [5.0 MPaG], go to (3).4) If other than 1), 2) or 3), compare the pressures while the sensor is running. Go to (2).(2) Compare the gauge pressure and the pressure displayed on self-diagnosis LED1,2 after 15 minutes have passed since the start of operation. (Compare them by PSIG [MPaG] unit.)1) When the difference between both pressures is within 36 PSIG [0.25 MPaG], both the high pressure sensor and the control board

are normal. 2) When the difference between both pressures exceeds 36 PSIG [0.25 MPaG], the high pressure sensor has a problem. (perfor-

mance deterioration) 3) When the pressure displayed on self-diagnosis LED1, 2 does not change, the high pressure sensor has a problem.(3) Remove the high pressure sensor from the control board to check the pressure on the self-diagnosis LED1, 2.1) When the pressure displayed on self-diagnosis LED1, 2 is between 0 and 14 PSIG [0.098 MPaG], the high pressure sensor has a

problem.2) When the pressure displayed on self-diagnosis LED1, 2 is approximately 725 PSIG [5.0 MPaG], the control board has a problem. (4) Remove the high pressure sensor from the control board, and short-circuit between the pin 2 and pin 3 connectors

(63HS) to check the pressure with self-diagnosis LED1, 2.1) When the pressure displayed on the self-diagnosis LED1, 2 exceeds 725 PSIG [5.0 MPaG], the high pressure sensor has a problem.2) If other than 1), the control board has a problem.

High Pressure Sensor Configuration (63HS)

The high pressure sensor consists of the circuit shown in the figure below. If 5 V DC is applied between the white and the black wires, voltage corresponding to the pressure between the blue and the black wires will be output, and the value of this voltage will be converted by the microcomputer. The output voltage is 0.078 V per 14 PSIG [0.098 MPaG].

The pressure sensor on the body side is designed to connect to the connector. The connector pin number on the body side is different from that on the control board side.

SW1ON

1 2 3 4 5 6 7 8

ON

1 2 3 4 5 6 7 8

The figure at left shows that the switches 1 through 4 are set to ON and 5 through 8 are set to OFF.

Body side Control board side

Vcc Pin 1 Pin 3

Vout Pin 2 Pin 2

GND Pin 3 Pin 1

<HIGH PRESSURE SENSOR>

Note:

3

2

1

WHT

BLU

BLKSE

NS

OR

5 V DC

GND63HS

Vout MICROPROCESSOR

OUTDOOR MULTI CONTROLLER CIRCUIT BOARD

3–1: 5 V (DC)2–1: Output Vout (DC)

Pressure: 0–725 PSIG [5.0 MPa]Vout: 0.5–4.5 V0.078 V/14 PSIG [0.098 MPa]

0.5

2.5 5

2.5

4.5

Vout (V)

PRESSURE (PSI)(MPa)

363 725

OCH612

SW2Pump down

SW6Function selection



21S44-way valve

SV1Bypass valve

CNACPower supply for outdoor multi controller circuit board208/230 V AC

CNS1Indoor/outdoor unit connecting wire

CNS2Transmission wire of centralized control

CN40,CN41Centralized control power supply/For storing jumper connector selection

CN102Connect to the M-NET power circuit board

CN51External signaloutput

SW4Model selection

SW7Manual defrost

SW3Test run

CN2Connect to the outdoor power circuit board 1–5:Power circuit board → Transmitting signal to the outdoor multi controller circuit board (0–5 V DC)2–5: Zero cross signal (0–5 V DC)3–4: Not used 6–5: 16 V DC7–5: 16 V DC

CNDC310–340 V DC (Y)310–350 V DC (V)(1(+)–3(−))

VCC (TEST POINT2)(Voltage between pins of C82A) : 15 V DC(Same as CNF1,2 5(+)–4(−))

VSP (Voltage between pins of C515 and C516) : 0 V DC (when stopped)1–6.5 V DC (when operated)(Same as CNF1,2 6(+)–4(−))

CNF1, 2Connect to fan motors1–4 : 310–340 V DC (Y) : 310–350 V DC (V)5–4 : 15 V DC6–4 : 0–6.5 V DC7–4 : 15 V DC (when stopped) 0–15 V DC pulse (when operated)

VDC (TEST POINT1)(Voltage between pins of C510) : 310–340 V DC (Y) : 310–350 V DC (V)(Same as CNF1,2 1(+)–4(−))

VFG (TEST POINT4)(Voltage between pin3 and pin4 of PC511 or PC512) : (Correspond to CNF1,2 7(+)–4(−))

TH4 Thermistor<Compressor>

TH7/TH6 Thermistor<Ambient/Suction pipe>

63HSHigh pressure sensor

63HHigh pressure switch

TH3 Thermistor<Outdoor liquid pipe>

CN3DInput of demand control

CNLVAElectronic expansionvalve

SW1Display selection(Self-diagnosis)SWU2, SWU1Address setting

SW8Model selection

CN3SInput of demand con-trol

63LSLow pressure sensor

CNLVBElectronic expansionvalve

TH2 Thermistor<Hic pipe>

99

8-9. TEST POINT DIAGRAMOutdoor multi controller circuit boardPUMY-P36/48NKMU1(-BS)

<CAUTION> TEST POINT 1 is high voltage.

OCH612

100

Outdoor power circuit boardPUMY-P36/48NKMU1(-BS)

CNAC1208/230 V ACConnect to the M-NET power circuit board (CN1)CNAC2208/230 V ACConnect to the outdoor multi controller circuit board

NI, LIVoltage of 230 V AC is input (Connect to the terminal block (TB1))

EI, E4Connect to the electrical parts box

DCL1, DCL2Connect to DCL

U/V/WConnect to the compres-sor (MC) Voltage among phases: 10–180 V AC

CNDC310–350 V DC (1+, 3−)Connect to the outdoor multi controller circuit board (CNDC)

E2, E3Connect to the elec-trical parts box

CN52C52C driving signalConnect to the outdoor multi controller circuit board (CN52C)

CN2Connect to the outdoor multi controller circuit board (CN2)1–5:Transmitting signal to outdoor multi controller circuit board (0–5 V DC)2–5: Zero cross signal (0–5 V DC)3–4: 18 V DC6–5: 16 V DC7–5: 16 V DC

CN4Connect to the outdoor multicontroller circuit board (CN4)

Brief Check of POWER MODULEUsually, they are in a state of being short-circuited if they are broken.Measure the resistance in the following points (connectors, etc.). If they are short-circuited, it means that they are broken.1. Check of POWER MODULE 1 Check of DIODE circuit R - L1 , S - L1 , R - N1 , S - N1 2 Check of IGBT circuit L2 - N1 3 Check of INVERTER circuit P - U , P - V , P - W , N1 - U , N1 - V , N1 - W

Power module

Note: The marks R , S , L1 , L2 , P , N1 , U , V and W shown in the diagram are not actually printed on the board.

S R

(CNAC)

W V U L2 P N1 L1

OCH612

101

M-NET power circuit boardPUMY-P36/48NKMU1(-BS)

CN2Connect to the outdoor multi controller circuit board (CN102) 1–2: 24–30 V DC3–4: 24–30 V DC

CN1• Connect to the outdoor

noise filter circuit board (CNAC1) (Y)

• Connect to the outdoorpower circuit board (CNAC1) (V)1–3 : 208/230 V AC

TB1Connect to the electrical parts box

OCH612

102

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sor

over

cur

rent

in

terc

eptio

n de

lay

Volta

ge a

bnor

mali

ty de

layIns

uffi cie

nt ref

rigera

nt am

ount

abno

rmalit

y dela

yCu

rrent

sen

sor/

prim

ary

curr

ent

abno

rmal

ity d

elay

63LS

abno

rmal

ity

dela

y63

HS ab

norm

ality

delay

star

t ove

r cur

rent

in

terc

eptio

n ab

norm

ality

del

ay

1001

0100

00Ab

norm

ality

delay

histo

ry 3

63LS

abno

rmali

ty de

layTH

2 ab

norm

ality

de

lay

4-wa

y va

lve

abno

rmal

ity d

elay

Delay

caus

ed by

bloc

ked

valve

in co

oling

mod

ePo

wer m

odul

e ab

norm

ality

del

ayTH

6 ab

norm

ality

de

lay

Cur

rent

sen

sor

open

/sho

rt de

lay

1111

0100

00Ab

norm

ality

code

histo

ry 1

(the l

atest)

Alte

rnat

ing

disp

lay

of a

ddre

sses

0000

–999

9 an

d ab

norm

ality

cod

e(in

clud

ing

abno

rmal

ity d

elay

cod

e)

• Dis

play

abn

orm

aliti

es u

p to

pres

ent (

incl

udin

g ab

norm

ality

term

inal

s)• H

isto

ry re

cord

in 1

is th

ela

test

; rec

ords

bec

ome

olde

rin

seq

uenc

e; h

isto

ry re

cord

in 1

0 is

the

olde

st.

1200

1100

00Ab

norm

ality

code

histo

ry 2

1310

1100

00Ab

norm

ality

code

histo

ry 3

1401

1100

00Ab

norm

ality

code

histo

ry 4

1511

1100

00Ab

norm

ality

code

histo

ry 5

1600

0010

00Ab

norm

ality

code

histo

ry 6

1710

0010

00Ab

norm

ality

code

histo

ry 7

1801

0010

00Ab

norm

ality

code

histo

ry 8

1911

0010

00Ab

norm

ality

code

histo

ry 9

2000

1010

00Ab

norm

ality c

ode h

istory

10

(the o

ldest)

2110

1010

00C

umul

ativ

e tim

e0–

9999

(unit

: 1 h

our)

Dis

play

of c

umul

ativ

e co

mpr

esso

r ope

ratin

g tim

e22

0110

1000

Cum

ulat

ive

time

0–99

99 (u

nit: 1

0 hou

r)23

1110

1000

Outdo

or un

it ope

ration

displa

yCo

mpres

sor e

nergi

zing

Compre

ssor op

erating

prohib

itionCo

mpres

sor in

opera

tion

Abno

rmali

ty de

tectio

nLi

ght O

N/L

ight

OFF

2400

0110

00Ind

oor u

nit op

eratio

n mod

eN

o.1

unit

mod

eN

o.2

unit

mod

eN

o.3

unit

mod

eN

o.4

unit

mod

eN

o.5

unit

mod

eN

o.6

unit

mod

eN

o.7

unit

mod

eN

o.8

unit

mod

eCo

oling

: ligh

t on,

Heati

ng: li

ght b

linkin

gSt

op fa

n: lig

ht off

2510

0110

00Ind

oor u

nit op

eratio

n disp

layNo

.1 u

nit o

pera

tion

No.2

unit

ope

ratio

nNo

.3 u

nit o

pera

tion

No.4

unit

ope

ratio

nNo

.5 u

nit o

pera

tion

No.6

unit

ope

ratio

nNo

.7 u

nit o

pera

tion

No.8

unit

ope

ratio

nTh

ermo O

N : lig

ht on

Therm

o OFF

: ligh

t off

Del

ay c

ode

Abn

orm

ality

del

ayD

elay

cod

eA

bnor

mal

ity d

elay

1202

Dis

char

ge/C

omp.

tem

pera

ture

16

00D

isch

arge

sup

erhe

at (S

Hd)

Th

erm

isto

r <C

ompr

esso

r>(T

H4)

O

ver c

harg

e re

frige

rant

12

05Th

erm

isto

r <O

utdo

or li

quid

pip

e> (T

H3)

16

01In

suffi

cien

t ref

riger

ant

1211

Ther

mis

tor <

Suc

tion

pipe

> (T

H6)

C

lose

d co

olin

g va

lve

1214

Ther

mis

tor <

Hea

t sin

k> (T

H8)

16

084-

way

val

ve d

isco

nnec

tion

1221

Ther

mis

tor <

Am

bien

t> (T

H7)

43

10C

urre

nt s

enso

r ope

n/sh

ort

1222

Ther

mis

tor <

HIC

> (T

H2)

4320

Und

ervo

ltage

, ove

rvol

tage

, or p

ower

mod

ule

1400

Low

pre

ssur

e se

nsor

43

30H

eat s

ink

tem

pera

ture

14

02H

igh

pres

sure

(63H

)43

50P

ower

mod

ule

Hig

h pr

essu

re s

enso

r (63

HS

) 45

00O

utdo

or fa

n m

otor

OCH612

103

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

826

0101

1000

Capac

ity cod

e (No. 1

indoor

unit)

0–25

5

•Dis

play

of i

ndoo

r uni

tca

paci

ty c

ode

•The

No.

1 u

nit w

ill s

tart

from

th

e M

-NE

T ad

dres

s w

ith th

e lo

wes

t num

ber

2711

0110

00Ca

pacity

code (N

o. 2 ind

oor un

it)28

0011

1000

Capac

ity cod

e (No. 3

indoor

unit)

2910

1110

00Ca

pacity

code (N

o. 4 ind

oor un

it)30

0111

1000

Capac

ity cod

e (No. 5

indoor

unit)

3111

1110

00IC

1 op

erat

ion m

ode

STO

PFa

nCo

oling

ther

mo-

ONCo

oling

therm

o-OFF

Heat

ing th

erm

o-ON

Heati

ng th

ermo-O

FF•D

isplay

of in

door

unit o

perat

ing m

ode

3200

0001

00IC

2 op

erat

ion m

ode

3310

0001

00IC

3 op

erat

ion m

ode

3401

0001

00IC

4 op

erat

ion m

ode

3511

0001

00IC

5 op

erat

ion m

ode

3600

1001

00OC

oper

ation

mod

eCo

mpre

ssor

ON/

OFF

Hea

ting/

Coo

ling

Abno

rmal/

norm

alD

EFR

OS

T/N

ORe

frigera

nt pu

ll bac

k/no

Excit

ation

curre

nt/no

3-m

in.d

elay

/no

Ligh

t on/

light

off

3710

1001

00Ex

terna

l conn

ection

status

CN

3N1–

3 in

put

CN

3N1–

2 in

put

CN

3S1–

2 in

put

CN

3D1-

3 in

put

CN

3D1-

2 in

put

Inpu

t: lig

ht o

ff No

inpu

t: lig

ht o

n

3801

1001

00Com

munica

tion de

mand

capacit

y0–

255

(%)

Dis

play

of c

omm

unic

atio

n de

man

d ca

paci

ty

3911

1001

00Num

ber of

compre

ssor O

N/OFF

0000

–999

9 (u

nit:

x10)

Dis

play

a c

ount

of

com

pres

sor o

pera

tion/

stop

4000

0101

00Co

mpres

sor op

erating

curre

nt0–

999.

9 (A

rms)

Dis

play

det

ecte

d cu

rren

t41

1001

0100

Input

curren

t of o

utdoo

r unit

4201

0101

00Th

ermo-O

N op

eratin

g tim

e00

00–9

999

(uni

t: x1

0)D

ispl

ay c

umul

ativ

e tim

e of

th

erm

o-O

N o

pera

tion

4311

0101

00Tot

al cap

acity o

f therm

o-ON

0–25

5D

ispl

ay to

tal c

apac

ity c

ode

of in

door

uni

ts in

ther

mo-

ON

4400

1101

00Nu

mber

of ind

oor u

nits

0–25

5Dis

play n

umbe

r of c

onne

cted i

ndoo

r unit

s45

1011

0100

DC

bus

vol

tage

0–99

9.9

(V)

Dis

play

bus

vol

tage

4601

1101

00Sta

te of

LEV c

ontro

lTd

ove

r hea

tpr

even

tion

SH

d de

crea

sepr

even

tion

Min.S

j corr

ectio

nde

pend

s on T

dMi

n.Sj c

orrec

tion

depe

nds o

n Shd

LEV o

penin

g corr

ectio

nde

pend

s on P

dLE

V ope

ning c

orrec

tion

depe

nds o

n Td

Correc

tion of

high c

ompre

ssion

ratio p

revent

ionD

ispl

ay a

ctiv

e LE

V c

ontro

l

4711

1101

00St

ate

of c

ompr

esso

rfre

quen

cy c

ontro

l 1C

onde

nsin

g te

mpe

ratu

re li

mit

cont

rol

Com

pres

sor

tem

pera

ture

co

ntro

l

Dis

char

ge te

mp.

(h

eatin

g) b

acku

p co

ntro

lP

d ab

norm

ality

cont

rol (

heat

ing)

Pd

Bac

k up

co

ntro

l(hea

ting)

Free

ze

prev

entio

n co

ntro

l at t

he

begi

ning

of S

Hd

Dis

play

act

ive

com

pres

sor

frequ

ency

con

trol

4800

0011

00St

ate

of c

ompr

esso

rfre

quen

cy c

ontro

l 2He

at sin

k ove

r hea

t pre

venti

on co

ntrol

Sec

onda

rycu

rren

t con

trol

Inpu

t cur

rent

cont

rol

Frequ

ency

restr

ain of

rec

eipt v

oltag

e cha

nge

Low

press

ure de

creas

e pre

venti

onH

z-up

inhi

bit

cont

rol a

t the

be

gini

ng o

f SH

d

4910

0011

00P

rote

ctio

n in

put

63LS

ab

norm

ality

HIC

abn

orm

ality

Froz

en

prot

ectio

n4-w

ay val

ve dis

conne

ction

abno

rmalit

yD

elay

cau

sed

by

bloc

ked

valv

e in

co

olin

g m

ode

TH6

abno

rmal

ityP

ower

mod

ule

abno

rmal

ity

5001

0011

00The

secon

d curre

nt valu

e when

microp

rocess

or of PO

WER

BOAR

D abno

rmality

is dete

cted

0–99

9.9[

Arm

s]

Dis

play

dat

a at

tim

e of

ab

norm

ality

5111

0011

00Hea

tsink te

mpera

turewhe

n micro

proces

sor of

POWE

R BO

ARD

abnorm

ality is d

etecte

d−9

9.9–

999.

9 (°

F)

Sta

te o

f com

pres

sor f

requ

ency

(Hz)

con

trol

Con

tent

Dis

char

ge p

ress

ure

cont

rol

Hz

cont

rol b

y pr

essu

re li

mita

tion

Com

pres

sor t

empe

ratu

re c

ontro

lH

z co

ntro

l by

disc

harg

e te

mpe

ratu

re li

mita

tion

SV

con

trol

Hz

cont

rol b

y by

pass

val

veA

bnor

mal

rise

of P

d co

ntro

lC

ontro

l tha

t res

train

s ab

norm

al ri

se o

f dis

char

ge p

ress

ure

Hea

t sin

k ov

er h

eat p

reve

ntio

n co

ntro

lH

eat s

ink

over

hea

t pre

vent

ion

cont

rol

Sec

onda

ry c

urre

nt c

ontro

lS

econ

dary

cur

rent

con

trol

Inpu

t cur

rent

con

tol

Inpu

t cur

rent

con

tol

Hz

corr

ectio

n of

rece

ipt v

olta

ge d

ecre

ase

prev

entio

nM

ax.H

z co

rrec

tion

cont

rol d

ue to

vol

tage

dec

reas

eH

z re

stra

in o

f rec

eipt

vol

tage

cha

nge

Max

.Hz

corr

ectio

n co

ntro

l due

to re

ceip

t vol

tage

cha

nge

OCH612

104

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

8

5200

1011

00O

utdo

or L

EV-

A op

enin

g pu

lse

0–20

00 (p

ulse

)D

ispl

ay o

f ope

ning

pul

se o

f ou

tdoo

r LE

V

5310

1011

00Ou

tdoor

LEV-A

open

ing

pulse

abno

rmali

ty de

lay

5401

1011

00Ou

tdoor

LEV-A

open

ing

pulse

abno

rmali

ty

5511

1011

00O

utdo

or L

EV-

B

open

ing

puls

e

5600

0111

00Ou

tdoor

LEV-B

open

ing

pulse

abno

rmali

ty de

lay

5710

0111

00Ou

tdoor

LEV-B

open

ing

pulse

abno

rmali

ty58

0101

1100

63LS

(Low

pre

ssur

e)−9

9.9–

999.

9 (P

SIG

)

Dis

play

of d

ata

from

sen

sor

and

ther

mis

tor

5911

0111

0063

LS ab

norm

ality

delay

−99.

9–99

9.9

(PS

IG)

6000

1111

0063

LS

abn

orm

ality

61

1011

1100

TH2

(Hic

pip

e)−9

9.9–

999.

9 (°

F)62

0111

1100

TH2(H

ic) ab

norm

ality d

elay

−99.

9–99

9.9

(°F)

6311

1111

00TH

2 (Hic

) abn

ormalit

y64

0000

0010

Opera

tiona

l freq

uenc

y0–

255

(Hz)

Displa

y of a

ctual

opera

ting f

reque

ncy

6510

0000

10Ta

rget

freq

uenc

y0–

255

(Hz)

Dis

play

of t

arge

t fre

quen

cy

6601

0000

10O

utdo

or fa

n co

ntro

l st

ep n

umbe

r0–

15D

ispl

ay o

f num

ber o

f out

door

fa

n co

ntro

l ste

ps (t

arge

t)69

1010

0010

IC1 L

EV O

penin

g puls

e

0–2

000

(pul

se)

Dis

play

of o

peni

ng p

ulse

of

indo

or L

EV

7001

1000

10IC

2 LEV

Ope

ning p

ulse

7111

1000

10IC

3 LEV

Ope

ning p

ulse

7200

0100

10IC

4 LEV

Ope

ning p

ulse

7310

0100

10IC

5 LEV

Ope

ning p

ulse

7401

0100

10Hig

h pres

sure

sens

or (Pd

) −9

9.9–

999.

9 (P

SIG

)

Dis

play

det

ecte

d da

ta o

f ou

tdoo

r uni

t sen

sors

and

th

erm

isto

rs

7511

0100

10TH

4(Com

presso

r)(Td)

data

−99.

9–99

9.9

(°F)

7600

1100

10TH

6(Suct

ion pip

e) (ET

) data

7710

1100

10TH

7(Am

bient

) dat

a78

0111

0010

TH3(O

utdoor

liquid

pipe) d

ata80

0000

1010

TH8(H

eat s

ink) d

ata81

1000

1010

IC1

TH23

(Gas

)

−99.

9–99

9.9

(°F)

(W

hen

indo

or u

nit i

s no

t con

nect

ed, i

t is

disp

laye

d as

0.)

Dis

play

det

ecte

d da

ta o

f in

door

uni

t the

rmis

tor

8201

0010

10IC

2 TH

23 (G

as)

8311

0010

10IC

3 TH

23 (G

as)

8400

1010

10IC

4 TH

23 (G

as)

8510

1010

10IC

5 TH

23 (G

as)

OCH612

105

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

886

0110

1010

IC1

TH22

(Liq

uid)

−99.

9–99

9.9

(°F)

(Whe

n th

e in

door

uni

t is

not c

onne

cted

, it i

s di

spla

yed

as 0

.)D

ispl

ay d

etec

ted

data

of

indo

or u

nit t

herm

isto

rs

8711

1010

10IC

2 TH

22 (L

iqui

d)88

0001

1010

IC3

TH22

(Liq

uid)

8910

0110

10IC

4 TH

22 (L

iqui

d)90

0101

1010

IC5

TH22

(Liq

uid)

9111

0110

10IC

1 TH

21 (I

ntak

e)92

0011

1010

IC2

TH21

(Int

ake)

9310

1110

10IC

3 TH

21 (I

ntak

e)94

0111

1010

IC4

TH21

(Int

ake)

9511

1110

10IC

5 TH

21 (I

ntak

e)96

0000

0110

Outdo

or SC

(coo

ling)

−99.

9–99

9.9

(:)

Disp

lay of

outdo

or su

bcoo

l (SC)

data

9710

0001

10Ta

rget

subc

ool s

tep

−2–4

Disp

lay o

f tar

get s

ubco

ol ste

p da

ta98

0100

0110

IC1

SC

/SH

−99.

9–99

9.9

(:)

durin

g he

atin

g: s

ubco

ol (S

C)/d

urin

g co

olin

g: s

uper

heat

(SH

) (Fi

xed

to "0

" dur

ing

cool

ing

oper

atio

n)D

ispl

ay o

f ind

oor S

C/S

H

data

9911

0001

10IC

2 S

C/S

H

100

0010

0110

IC3

SC

/SH

10

110

1001

10IC

4 S

C/S

H

102

0110

0110

IC5

SC

/SH

10

311

1001

10Dis

charge

supe

rheat

(SHd)

−99.

9–99

9.9

(:)

Displa

y of ou

tdoor d

ischar

ge sup

erheat

(SHd

) data

105

1001

0110

Target

Pd dis

play (h

eating

) kgf/F

P

dm (0

.0–3

0.0)

(kgf

/cm

²)

Disp

lay o

f all c

ontro

l targ

et d

ata

106

0101

0110

Targe

t ET d

isplay

(coo

ling)

ETm

(−2.

0–23

.0) (:

)10

711

0101

10Tar

get o

utdoo

r SC (

cooling

)S

Cm

(0.0

–20.

0) (:

)10

800

1101

10Tar

get in

door

SC/SH

(IC1)

SC

m/S

Hm

(0.0

–20.

0) (:

)10

910

1101

10Tar

get in

door

SC/SH

(IC2)

110

0111

0110

Targe

t indo

or SC

/SH (IC

3)11

111

1101

10Tar

get in

door

SC/SH

(IC4)

112

0000

1110

Targe

t indo

or SC

/SH (IC

5)11

310

0011

10Ind

oor un

itcheck

status

(IC9-1

2)N

o.9

unit

chec

kN

o.10

uni

t che

ckN

o.11

uni

t che

ckN

o.12

uni

t che

ckLi

ght o

n at

tim

e of

abn

orm

ality

114

0100

1110

Indo

or u

nit o

pera

tion

mod

e (IC

9-12

)N

o.9

unit

mod

eN

o.10

uni

t mod

eN

o.11

uni

t mod

eN

o.12

uni

t mod

eC

OO

L/D

RY:

ligh

t on

H

EAT

:

light

blin

king

FAN

/STO

P:

light

off

115

1100

1110

Indo

or u

nit o

pera

tion

disp

lay

(IC9-

12)

No.

9 un

it op

erat

ion

No.

10 u

nit

oper

atio

nN

o.11

uni

t op

erat

ion

No.

12 u

nit

oper

atio

nTh

erm

o-O

N: l

ight

on

Th

erm

o-O

FF: l

ight

off

116

0010

1110

IC9 o

perat

ion m

ode

STO

PFa

nC

oolin

g Th

erm

o-O

NC

oolin

gth

erm

o-O

FFH

eatin

g th

erm

o-O

NH

eatin

gth

erm

o-O

FFD

ispl

ay o

f ind

oor u

nit

oper

atio

n m

ode

117

1010

1110

IC10

opera

tion m

ode

118

0110

1110

IC11

opera

tion m

ode

119

1110

1110

IC12

opera

tion m

ode

120

0001

1110

Targe

t indo

or SC

/SH (IC

9)

SC

m/S

Hm

(0.0

–20.

0) (:

)D

ispl

ay o

f all

cont

rol t

arge

t da

ta12

110

0111

10Tar

get in

door

SC/SH

(IC10

)12

201

0111

10Tar

get in

door

SC/SH

(IC11)

123

1101

1110

Targe

t indo

or SC

/SH (IC

12)

124

0011

1110

IC9 L

EV op

ening

pulse

ab

norm

ality

delay

0–20

00 (p

ulse

)D

ispl

ay o

f ope

ning

pul

se

of in

door

LE

V a

t tim

e of

ab

norm

ality

del

ay

125

1011

1110

IC10

LEV o

penin

g puls

e ab

norm

ality

delay

126

0111

1110

IC11

LEV o

penin

g puls

e ab

norm

ality

delay

127

1111

1110

IC12

LEV o

penin

g puls

e ab

norm

ality

delay

OCH612

106

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

8

128

0000

0001

Actua

l freq

uenc

y of

abno

rmali

ty de

lay0–

255

(Hz)

Dis

play

of a

ctua

l frq

uenc

y at

tim

e of

abn

orm

ality

del

ay

129

1011

0001

Fan s

tep nu

mber

at tim

e of

abno

rmali

ty de

lay0–

15D

ispl

ay o

f fan

ste

p nu

mbe

r at

tim

e of

abn

orm

ality

del

ay

131

1100

0001

IC1 L

EV op

ening

pulse

ab

norm

ality

delay

0–20

00 (p

ulse

)D

elay

of o

peni

ng p

ulse

of

indo

or L

EV

at t

ime

of

abno

rmal

ity d

elay

132

0010

0001

IC2 L

EV op

ening

pulse

ab

norm

ality

delay

133

1010

0001

IC3 L

EV op

ening

pulse

ab

norm

ality

delay

134

0110

0001

IC4 L

EV op

ening

pulse

ab

norm

ality

delay

135

1110

0001

IC5 L

EV op

ening

pulse

ab

norm

ality

delay

136

0001

0001

High p

ressu

re se

nsor

data

at tim

e of a

bnorm

ality

delay

kgf/c

m2−9

9.9–

999.

9 (P

SIG

)

Dis

play

of d

ata

from

Hig

h pr

essu

re s

enso

r,al

l the

rmis

tors

, and

SC

/SH

at

time

ofab

norm

ality

del

ay

137

1001

0001

TH4

(Com

pres

sor)

sens

or d

ata

at tim

e of

ab

norm

ality

delay

°C

−99.

9–99

9.9

(°F)

138

0101

0001

TH6

(Suc

tion

pipe

) se

nsor

dat

a at

tim

e of

ab

norm

ality

del

ay °C

139

1101

0001

TH3 (

Outdo

or liq

uid pi

pe)

sens

or da

ta at

time o

f ab

norm

ality

delay

°C

140

0011

0001

TH8 (

Heat

sink)

sensor

data

at tim

e of a

bnorm

ality d

elay °

C

141

1011

0001

OC SC

(coo

ling)

at tim

e of

abno

rmali

ty de

lay °C

−99.

9–99

9.9(:

)D

urin

g he

atin

g: s

ubco

ol (S

C)

Dur

ing

cool

ing;

sup

erhe

at (S

H) (

Fixe

d to

"0" d

urin

g co

olin

g op

erat

ion)

142

0111

0001

IC1 S

C/SH

at tim

e of

abno

rmali

ty de

lay °C

143

1111

0001

IC2 S

C/SH

at tim

e of

abno

rmali

ty de

lay °C

144

0000

1001

IC3 S

C/SH

at tim

e of

abno

rmali

ty de

lay °C

145

1000

1001

IC4 S

C/SH

at tim

e of

abno

rmali

ty de

lay °C

146

0100

1001

IC5 S

C/SH

at tim

e of

abno

rmali

ty de

lay °C

147

1100

1001

IC9 S

C/SH

at tim

e of

abno

rmali

ty de

lay °C

148

0010

0001

IC10

SC/SH

at tim

e of

abno

rmali

ty de

lay °C

149

1010

1001

IC11

SC/SH

at tim

e of

abno

rmali

ty de

lay °C

150

0110

1001

IC12

SC/SH

at tim

e of

abno

rmali

ty de

lay °C

OCH612

107

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

8

151

1110

1001

IC9 L

EV op

ening

pulse

at

time o

f abn

ormali

ty

0–20

00 (p

ulse

)D

ispl

ay o

f ope

ning

pul

se

of in

door

LE

V a

t tim

e of

ab

norm

ality

152

0001

1001

IC10

LEV o

penin

g puls

e at

time o

f abn

ormali

ty

153

1001

1001

IC11

LEV o

penin

g puls

e at

time o

f abn

ormali

ty

154

0101

1001

IC12

LEV o

penin

g puls

e at

time o

f abn

ormali

ty

155

1101

1001

IC9 S

C/SH

at tim

e of

abno

rmali

ty

−99.

9–99

9.9(:

)D

urin

g he

atin

g: s

ubco

ol (S

C)

Dur

ing

cool

ing;

sup

erhe

at (S

H) (

Fixe

d to

"0" d

urin

g co

olin

g op

erat

ion)

Dis

play

of i

ndoo

r SC

/SH

da

ta a

t tim

e of

abn

orm

ality

156

0011

1001

IC10

SC/SH

at tim

e of

abno

rmali

ty

157

1011

1001

IC11

SC/SH

at tim

e of

abno

rmali

ty

158

0111

1001

IC12

SC/SH

at tim

e of

abno

rmali

ty15

911

1110

01IC

9 C

apac

ity c

ode

0–25

5

Dis

play

of i

ndoo

r uni

t ca

paci

ty c

ode

The

No.

1 un

it w

ill s

tart

from

th

e M

-NE

T ad

dres

s w

ith th

e lo

wes

t num

ber

160

0000

0101

IC10

Cap

acity

code

161

1000

0101

IC11

Cap

acity

code

162

0100

0101

IC12

Cap

acity

code

163

1100

0101

IC9

SC

/SH

−99.

9–99

9.9(:

)D

urin

g he

atin

g: s

ubco

ol (S

C)

Dur

ing

cool

ing;

sup

erhe

at (S

H) (

Fixe

d to

"0" d

urin

g co

olin

g op

erat

ion)

Dis

play

of i

ndoo

r SC

/SH

da

ta

164

0010

0101

IC10

SC

/SH

165

1010

0101

IC11

SC

/SH

166

0110

0101

IC12

SC

/SH

170

0101

0101

RO

M v

ersi

on

mon

itor

0.00

–99.

99 (v

er)

Dis

play

of v

ersi

on d

ata

of

RO

M17

111

0101

01R

OM

type

Dis

play

of R

OM

type

172

0011

0101

Che

ck s

um m

ode

0000

–FFF

FD

ispl

ay o

f che

ck s

um c

ode

of R

OM

173

1011

0101

IC9

TH23

(Gas

)

−99.

9–99

9.9

(°F)

D

ispl

ay d

etec

ted

data

of

indo

or u

nit t

herm

isto

rs

174

0111

0101

IC10

TH2

3 (G

as)

175

1111

0101

IC11

TH2

3 (G

as)

176

0000

1101

IC12

TH2

3 (G

as)

177

1000

1101

IC9

TH22

(Liq

uid)

178

0100

1101

IC10

TH2

2 (L

iquid)

179

1100

1101

IC11

TH2

2 (L

iquid)

180

0010

1101

IC12

TH2

2 (L

iquid)

181

1010

1101

Back

up h

eatin

gde

term

inatio

n va

lue "a

"

182

0110

1101

Back

up h

eatin

gde

term

inatio

n va

lue "b

"

183

1110

1101

Back

up h

eatin

gde

term

inatio

n va

lue "c

"

184

0001

1101

Back

up h

eatin

gde

term

inatio

n va

lue "d

"18

510

0111

01IC

9 TH

21 (I

ntak

e)18

601

0111

01IC

10 T

H21

(Inta

ke)

187

1101

1101

IC11

TH2

1 (In

take

)18

800

1111

01IC

12 T

H21

(Inta

ke)

OCH612

108

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

8

189

1011

1101

His

tory

of v

olta

ge

erro

r (U

9/42

20)

--

PAM

err

orC

onve

rter F

ault

Pow

er

sync

hron

izat

ion

sign

al e

rror

L1 o

pen

phas

e er

ror

Unde

r volt

age

erro

rO

ver v

olta

ge e

rror

192

0000

0011

Act

ual f

requ

ency

of

abn

orm

ality

0–25

5 (H

z)D

ispl

ay o

f act

ual f

requ

ency

at

tim

e of

abn

orm

ality

193

1000

0011

Fan

step

num

ber

at ti

me

of

abno

rmal

ity0–

15D

ispl

ay o

f fan

ste

p nu

mbe

r at

tim

e of

abn

orm

ality

195

1100

0011

IC1 L

EV op

ening

pulse

at

time o

f abn

orma

lity

0–20

00 (p

ulse

)D

ispl

ay o

f ope

ning

pul

se

of in

door

LE

V a

t tim

e of

ab

norm

ality

196

0010

0011

IC2 L

EV op

ening

pulse

at

time o

f abn

orma

lity

197

1010

0011

IC3 L

EV op

ening

pulse

at

time o

f abn

orma

lity

198

0110

0011

IC4 L

EV op

ening

pulse

at

time o

f abn

orma

lity

199

1110

0011

IC5 L

EV op

ening

pulse

at

time o

f abn

orma

lity

200

0001

0011

High

pres

sure

sens

or

data

at tim

e of

abno

rmali

ty−9

9.9–

999.

9 (P

SIG

)

Dis

play

of d

ata

from

H

igh

pres

sure

sen

sor,

all

ther

mis

tors

, and

SC

/SH

at

time

of a

bnor

mal

ity.

201

1001

0011

TH4 (

Comp

ress

or)

sens

or da

ta at

time o

f ab

norm

ality

−99.

9–99

9.9

(°F)

202

0101

0011

TH6 (

Sucti

on pi

pe)

sens

or da

ta at

time o

f ab

norm

ality

203

1101

0011

TH3 (

Outdo

or liq

uid

pipe)

sens

or da

ta at

time o

f abn

orma

lity

204

0011

0011

TH8 (

Heat

sink)

sens

or da

ta at

time o

f ab

norm

ality

205

1011

0011

OC SC

(coolin

g) at tim

e of

abnorm

ality

−99.

9–99

9.9(:

) D

urin

g he

atin

g: s

ubco

ol (S

C)

Dur

ing

cool

ing;

sup

erhe

at (S

H) (

Fixe

d to

"0" d

urin

g co

olin

g op

erat

ion)

Dis

play

of i

ndoo

r SC

/SH

da

ta a

t tim

e of

abn

orm

ality

206

0111

0011

IC1 S

C/SH

at tim

e of

abno

rmali

ty

207

1111

0011

IC2 S

C/SH

at tim

e of

abno

rmali

ty

208

0000

1011

IC3 S

C/SH

at tim

e of

abno

rmali

ty

209

1000

1011

IC4 S

C/SH

at tim

e of

abno

rmali

ty

210

0100

1011

IC5 S

C/SH

at tim

e of

abno

rmali

ty21

111

0010

11IC

6 C

apac

ity c

ode

0–25

5

Dis

play

of i

ndoo

r uni

t ca

paci

ty c

ode

The

No.

1 un

it w

ill s

tart

from

th

e M

-NE

T ad

dres

s w

ith th

e lo

wes

t num

ber

212

0010

1011

IC7

Cap

acity

cod

e

213

1010

1011

IC8

Cap

acity

cod

e

214

0110

1011

IC6 o

perat

ion m

ode

STO

PFa

nC

oolin

g th

erm

o-O

NC

oolin

gth

erm

o-O

FFH

eatin

g th

erm

o-O

NH

eatin

gth

erm

o-O

FFD

ispl

ay o

f ind

oor u

nit

oper

atio

n m

ode

215

1110

1011

IC7 o

perat

ion m

ode

216

0001

1011

IC8 o

perat

ion m

ode

OCH612

109

No.

SW

1 se

tting

Dis

play

mod

eD

ispl

ay o

n th

e LE

D1,

2 (d

ispl

ay d

ata)

Not

es12

3456

781

23

45

67

821

710

0110

11IC

6 LEV

open

ing pu

lse0–

2000

(pul

se)

Dis

play

of o

peni

ng p

ulse

of

indo

or L

EV

218

0101

1001

IC7 L

EV op

ening

pulse

219

1101

1001

IC8 L

EV op

ening

pulse

220

0011

1011

IC6

TH23

(Gas

)

−99.

9–99

9.9

(°F)

Dis

play

det

ecte

d da

ta o

f in

door

uni

t the

rmis

tor

221

1011

1011

IC7

TH23

(Gas

)22

201

1110

11IC

8 TH

23 (G

as)

223

1111

1011

IC6

TH22

(liq

uid)

224

0000

0111

IC7

TH22

(liq

uid)

225

1000

0111

IC8

TH22

(liqu

id)

226

0100

0111

IC6

TH21

(int

ake)

227

1100

0111

IC7

TH21

(int

ake)

228

0010

0111

IC8

TH21

(int

ake)

229

1010

0111

IC6

SC

/SH

−99.

9–99

9.9

(:)

durin

g he

atin

g: s

ubco

ol (S

C)/d

urin

g co

olin

g: s

uper

heat

(SH

) (Fi

xed

to "0

" dur

ing

cool

ing

oper

atio

n)D

ispl

ay o

f ind

oor S

C/S

H

data

23

001

1001

11IC

7 S

C/S

H23

111

1001

11IC

8 S

C/S

H

232

0001

0111

Targ

et ind

oor S

C/SH

(IC

6)

SC

m/S

Hm

(0.0

–20.

0) (:

)D

ispl

ay o

f all

cont

rol t

arge

t da

ta23

310

0101

11Ta

rget

indoo

r SC/

SH

(IC7)

234

0101

0111

Targ

et ind

oor S

C/SH

(IC

8)

235

1101

0111

IC6 L

EV op

ening

pulse

ab

norm

ality

delay

0–20

00 (p

ulse

)D

ispl

ay o

f ope

ning

pul

se

of in

door

LE

V a

t tim

e of

ab

norm

ality

del

ay23

600

1101

11IC

7 LE

V op

ening

puls

e ab

norm

ality

delay

237

1011

0111

IC8

LEV

open

ing p

ulse

abno

rmali

ty de

lay

238

0111

0111

IC6

SC/S

H at

time

of

abno

rmali

ty de

lay

−99.

9–99

9.9

(:)

Dur

ing

heat

ing:

sub

cool

(SC

)D

urin

g co

olin

g: s

uper

heat

(SH

) (Fi

xegd

to "0

" dur

ing

cool

ing

oper

atio

n)

Dis

play

of i

ndoo

r SC

/SH

da

ta a

t tim

e of

abn

orm

ality

de

lay

239

1111

0111

IC7

SC/S

H at

time

of

abno

rmali

ty de

lay

240

0000

1111

IC8

SC/S

H at

time

of

abno

rmali

ty de

lay

241

1000

1111

IC6 L

EV op

ening

pulse

at

time o

f abn

orma

lity 0–

2000

(pul

se)

Dis

play

of o

peni

ng p

ulse

of

indo

or L

EV

at t

ime

of

abno

rmal

ity24

201

0011

11IC

7EV

open

ing pu

lse

at tim

e of a

bnor

mality

243

1100

1111

IC8 L

EV op

ening

pulse

at

time o

f abn

orma

lity

244

0010

1111

IC6 S

C/SH

at tim

e of

abno

rmali

ty

−99.

9–99

9.9

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9 ELECTRICAL WIRING

9-1. OVERVIEW OF POWER WIRING

9-2. WIRING OF MAIN POWER SUPPLY AND EQUIPMENT CAPACITY9-2-1. Wiring diagram for main power supply

This chapter provides an introduction to electrical wiring for the CITY MULTI-S series, together with notes concerning power wiring, wiring for control (transmission wires and remote controller wires), and the frequency converter.

(1) Use a separate power supply for the outdoor unit and indoor unit.(2) Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water,etc.) when proceeding with the wiring and connections.(3) The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops.

Make sure the power-supply voltage does not drop more than 10 %.(4) Specific wiring requirements should adhere to the wiring regulations of the region.(5) Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 60245 IEC57).

For example, use wiring such as YZW.(6) Install an earth longer than other cables.

Warning:· Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly,

it may cause heating or fire.· Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct

current.

Caution:· Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric

shock.· Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a

malfunction of unit or fire.Be sure to install N-Line. Without N-Line, it could cause damage to the unit.·

Schematic Drawing of Wiring

208/230 V AC 60 Hz208/230 V AC 60 Hz

L1/L2

A

BA

CL1/L2

CL1/L2

CL1/L2

CL1/L2

D

A Switch (Breakers for Wiring and Current Leakage)B Outdoor UnitC M-NET Control Indoor unitD Pull Box

Note: The M-NET control indoor unit cannot receive power supplied from an outdoor unit, so provide it with power separately.

; ;

;

; ;

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9-2-2. Cross section area of Wire for Main Power and ON/OFF capacitiesPUMY-P36/48NKMU1(-BS)

Thickness of Wire for Main Power Supply and On/Off Capacities

ModelPower Supply

Minimum Wire Thickness (AWG [mm2]) Breaker for

Wiring*1Breaker for Current

LeakageMinimum cir-cuit ampacity

Maximum rating of over current protec-

tor deviceMain Cable*2 Ground

Outdoor Unit P36/48 208/230 VAC, 60 Hz AWG8 [8.4] AWG8 [8.4] 40 A 40 A 30 mA 0.1 sec. or less 31 A 44 A

Indoor Unit 208/230 VAC, 60 Hz Refer to installation manual of indoor unit.

*2. Use copper supply wires. Use the electric wires over the rating voltage 300 V..

Total operating current of the indoor unitMinimum wire thickness (AWG [mm2])

Ground-fault interruper *1Local switch (A) Breaker for wiring

(NFB)Main Cable Branch Ground Capacity FuseF0 = 15 A or less *2 14/2.1 14/2.1 14/2.1 15 A current sensitivity *3 15 15 15F0 = 20 A or less *2 12/3.3 12/3.3 12/3.3 20 A current sensitivity *3 20 20 20F0 = 30 A or less *2 10/5.5 10/5.5 10/5.3 30 A current sensitivity *3 30 30 30

Apply to IEC61000-3-3 about max. permissive system impedance.*1 The Ground-fault interrupter should support inverter circuit. The Ground-fault interrupter should combine using of local switch or wiring breaker.*2 Please take the larger of F1 or F2 as the value for F0.F1 = Total operating maximum current of the indoor units × 1.2F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Others)/C}

C : Multiple of tripping current at tripping time 0.01sPlease pick up “C” from the tripping characteristic of the breaker.

= 14.65

+ V3 × (Wire length [km])

G1 Current sensitivity30 or less 30 mA 0.1 sec or less

100 or less 100 mA 0.1 sec or less

Wire thickness (AWG [mm2]) V314/2.1 4812/3.3 5610/5.3 66

1. Use a separate power supply for the outdoor unit and indoor unit.2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops. Make sure the power-supply voltage does not drop more than 10%.4.

6000

600

60

10

1

0.1

0.011 2 3 4 6 8

C

10 20

Sample chartTr

ippi

ng T

ime

[s]

Rated Tripping current (x)

SAMPLE

*1. A breaker with at least 3.0 mm [1/8 inch] contact separation in each poles shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV).

<Example of “F2” calculation>* Condition PEFY-NMSU × 4 + PEFY-NMAU × 1, C = 8 (refer to right sample chart)F2 = 19.8 × 4/8 + 38 × 1/8

16 A breaker (Tripping current = 8 × 16 A at 0.01 s)* 3 Current sensitivity is calculated using the following formula.G1 = V2 × (Quantity of Type1) + V2 × (Quantity of Type2) + V2 × (Quantity of Type3) + V2 × (Quantity of Others)

Indoor unit V1 V2

Type 1PKFY-P·NHMU, PKFY-P·NKMU, PEFY-P·NMSU, PLFY-P·NEMU, PLFY-EP·NEMU, PMFY-P·NBMU, PCFY-P·NKMU

19.8 2.4

Type 2 PEFY-P·NMAU, PVFY-P·NAMU 38.0 1.6Type 3 PKFY-P·NBMU, PLFY-P·NCMU 3.5 2.4

Others PFFY-P·NEMU, PFFY-P·NRMU, PDFY-P·NMU, PEFY-P·NMHU 0.0 0.0

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9-3. DESIGN FOR CONTROL WIRINGPlease note that the types and numbers of control wires needed by the CITY MULTI-S series depend on the remote controllers and whether they are linked with the system or not.

9-3-1. Selection number of control wires

9-4. WIRING TRANSMISSION CABLES

M-NET remote controller

UseRemote controller used in system control operations.• Group operation involving different refrigerant systems.• Linked operation with upper control system.

Remote controller → indoor unit

2-core wire (non-polar)

Tran

smis

sion

w

ires

Wires connecting → indoor units

Wires connecting → indoor units with outdoor unit

Wires connecting → outdoor units

9-4-1. Types of control cables1. Wiring transmission cables• Types of transmission cables: Shielding wire CVVS, CPEVS or MVVS• Cable diameter: More than 13.5 ft2 [1.25 mm2] • Maximum wiring length: Within 656 ft [200 m]

2. M-NET Remote control cables

Kind of remote control cable Shielding wire (2-core) CVVS, CPEVS or MVVS

Cable diameter AWG 20 to AWG 16 [0.5 to 1.25 mm2]

Remarks When 10 m is exceeded, use a cable with the same specifi cations as transmission line wiring.

3. MA Remote control cables

Kind of remote control cable Sheathed 2-core cable (unshielded) CVV

Cable diameterAWG 22 to AWG 16 [0.3 to 1.25 mm2] AWG 18 to AWG 16 [0.75 to 1.25 mm2]*

Remarks Within 656 ft [200 m]

* Connected with simple remote controller.

9-4-2. Wiring examples• Controller name, symbol and allowable number of controllers.

Name Symbol Allowable number of controllers

Outdoor unit controller OC ―

Indoor unit controller M-ICPUMY-P36 1 to 7 units per 1 OC

PUMY-P48 1 to 10 units per 1 OC

Remote controller RCM-NET RC Maximum of 12 controllers for 1 OC

(Can not be connected if Branch box is used.)

MA-RC Maximum of 2 per group

Note that the number of connectable units may be limited by some conditions such as an indoor unit's capacity or each unit's equivalent power consumption. (Refer to DATA BOOK.)

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9-5. SYSTEM SWITCH SETTINGIn order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of the MULTI-S series, each microprocessor must be assigned an identification number (address). The addresses of outdoor units, indoor units, and remote controller must be set using their settings switches. Please consult the installation manual that comes with each unit for detailed information on setting procedures.

9-6. EXAMPLE EXTERNAL WIRING DIAGRAM FOR A BASIC SYSTEM

Outdoorunit

Grounded

Group operation

Remote controller wire

Pull box

Indoor unit

Breaker for Wiring and Current Leakage

Breaker for Wiring and Current Leakage

1.25 mm2 × 2

Power supplysingle phase208/230 V AC 60 Hz

Power supplysingle phase 208/230 V AC 60 Hz

Example of system when using a M-NET controller

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(3) Method of obtaining system power factorUse the following formula and the total power and current obtained in parts 1 and 2 on the above tables to calculate the system power factor.

System power factor =(Total system power consumption)

(Total system current × voltage) o 100 %

9-7-2. Applying to an electric power company for power and total currentCalculations should be performed separately for heating and cooling employing the same methods; use the largest resulting value in your application to the electric power company.

9-7. METHOD FOR OBTAINING ELECTRICAL CHARACTERISTICS WHEN A CAPACITY AGREEMENT IS TO BE SIGNED WITH AN ELECTRIC POWER COMPANY

The electrical characteristics of connected indoor unit system for air conditioning systems, including the MULTI-S series, depend on the arrangement of the indoor and outdoor units.First read the data on the selected indoor and outdoor units and then use the following formulas to calculate the electrical characteristics before applying for a capacity agreement with the local electric power company.

9-7-1. Obtaining the electrical characteristics of a CITY MULTI-S series system (1) Procedure for obtaining total power consumption

*The power consumption of the outdoor unit will vary depending on the total capacity of the selected indoor units.

(2) Method of obtaining total current

The current through the outdoor unit will vary depending on the total capacity of the selected indoor units.

Page numbers in this technical manual Power consumptionTotal power consumption of each indoor unit See the technical manual of each indoor unit 1

Power consumption of outdoor unit* Standard capacity diagram— Refer to 4-3. 2

Total power consumption of system See the technical manual of each indoor unit 1+2 <kW>

Page numbers in this technical manual SubtotalTotal current through each indoor unit See the technical manual of each indoor unit 1

Current through outdoor unit* Standard capacity diagram— Refer to 4-3. 2

Total current through system See the technical manual of each indoor unit 1+2 <A>

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10 REFRIGERANT PIPING TASKS

10-1. REFRIGERANT PIPING SYSTEM

Line-Branch MethodConnection Examples(Connecting to 4 Indoor Units)

Liquid Line

Gas Line

Piping Diameter (in [mm])Model

Liquid Line (inch [mm]) Gas Line (inch [mm]) 5/8 [{15.88]3/8 [{9.52]

Liquid LineGas Line

Liquid LineGas Line

Piping Diameter (in [mm])Model number

18 or lower

24 to 54

1/4 [{6.35]1/2 [{12.7]3/8 [{9.52]5/8 [{15.88]

Outdoor UnitFirst BranchIndoor unit

ABC

A+B+C+a+b+c+d [ 984 ft [300 meters]A+B+C+d [ 492 ft [150 meters] *B+C+d [ 98 ft [30 meters]164 ft [50meters] (If the outdoor unit is lower, 131 ft [40 meters])49 ft [15 meters]Use an optional branch piping kit (CMY-Y62-G-E).

Total Piping LengthFarthest Piping LengthFarthest Piping Length After First BranchHigh/Low Difference in Indoor/Outdoor SectionHigh/Low Difference in Indoor/Indoor Section

PermissibleLength

Permissible High/Low Difference

(L)(R)(H)(h)

Selecting the Refrigerant Branch Kit Select Each Section of Refrigerant Piping

Additional refrigerant charge

Select the size from the table to the right.

(1) Refrigerant Piping Diameter In Section From Outdoor Unit to First Branch (Outdoor Unit Piping Diameter)(1) Section From Outdoor Unit

to First Branch (A)(2) Sections From Branch to Indoor Unit (a,b,c,d)(3) Section From Branch to Branch (B,C)

(3) Refrigerant Piping Diameter In Section From Branch to Branch

(2) Refrigerant Piping Diameter In Section From Branch to Indoor Unit (Indoor Unit Piping Diameter)

EachSection ofPiping

Refrigerant for the extended piping is not included in the outdoor unit when the unit is shipped from the factory. Therefore, charge each refrigerant piping system with additional refrigerant at the installation site. In addition, in order to carry out service, enter the size and length of each liquid pipe and additional refrigerant charge amounts inthe spaces provided on the “Refrigerant amount” plate on the outdoor unit.Calculation of additional refrigerant charge

Calculate the additional charge using the liquid pipe size and length of the extended piping and total capacity of connected indoor units. Calculate the additional refrigerant charge using the procedure shown to the right, and charge with the additional refrigerant.For amounts less than 0.2 lb [0.1 kg], round up the calculated additional refrigerant charge.(For example, if the calculated charge is 13.2 lb [6.01 kg], round up the charge to 13.4 lb [6.1 kg].)

3/8 [{9.52]

5/8 [{15.88]PUMY-P36PUMY-P48

* The maximum pipe length between each indoor unit and an outdoor unit is 262 ft [80m] for the following indoor units: PKFY-P06NBMU, PKFY-P08NHMU, PFFY-P06/08/12NEMU, and PFFY-P06/08/12NRMUIf using a pipe longer than 262 ft [80 m], an optional external LEV box (PAC-SG95-LE-E) is required.

B

A

A

H

B C

L

R

d

a

h

b c

C

C

C C

Pipe sizeLiquid pipe

+


ø6.35 ø9.52[ft] × 0.21 [oz/ft](m) × 19.0 (g/m)

[ft] × 0.55 [oz/ft](m) × 50.0 (g/m)

<Additional Charge>Calculation of refrigerant charge

+

Total capacity of connected indoor units

Amount for the indoor units

– 27 kBTU/h 53 oz (1.5 kg)

28 – 54 kBTU/h 88 oz (2.5 kg)

55 – 62 kBUT/h 106 oz (3.0 kg)Included refrigerant amount when shipped from the factory

Included refrigerant amount

[40 × 19.0 + 45 × 50.0 + 2.5 = 5.6 kg (rounded up)]1000 1000

<Example>Outdoor model : P48Indoor 1 : P24 (24 kBTU/h)

A : ø9.52 66 ft [20 m]B : ø9.52 16 ft [5 m]C : ø9.52 16 ft [5 m] a : ø9.52 49 ft [15 m]

2 : P15 (15 kBTU/h) b : ø6.35 33 ft [10 m] 3 : P08 (8 kBTU/h) c : ø6.35 33 ft [10 m] 4 : P06 (6 kBTU/h) d : ø6.35 66 ft [20 m]

The total length of each liquid line is as follows:[3/8”] ø9.52 : A + B + C + a = 20 + 5 + 5 + 15 = 147 ft [45 m][1/4”] ø6.35 : b + c + d = 10 + 10 + 20 = 132 ft [40 m]The total capacity of connected indoor unit is as follows:24 + 15 + 08 + 06 = 53<Calculation example>Additional refrigerant charge

At the conditions below:

10 LBS. 9 OZ. (4.8 kg)

132 ft × 0.21 oz + 147 ft × 0.55 oz + 88 oz = 197 oz

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Header-Branch MethodConnection Examples(Connecting to 4 Indoor Units)

Outdoor UnitFirst BranchIndoor unit

ABC

A+a+b+c+d [ 984 ft [300 meters]A+d [ 492 ft [150 meters] *d is 98 ft [30 meters]164 ft [50 meters] (If the outdoor unit is lower, 131 ft [40 meters])49 ft [15 meters] Please select branching kit, which is sold separately, from the table below.(The kit comprises sets for use with liquid pipes and for use with gas pipes.)


PermissibleLength


(L)(R)(H)(h)

Select Each Section of Refrigerant Piping

Selecting the Refrigerant Branch Kit


(1) Section From Outdoor Unit to First Branch (A)(2) Sections From Branch to Indoor Unit (a,b,c,d)


Branch header (4 branches)CMY-Y64-G-E

Branch header (8 branches)CMY-Y68-G-E


B

A

A

a b c

C

cCC

d

H

h

L

r

Additional refrigerant chargeRefrigerant for the extended piping is not included in the outdoor unit when the unit is shipped from the factory. Therefore, charge each refrigerant piping system with additional refrigerant at the installation site. In addition, in order to carry out service, enter the size and length of each liquid pipe and additional refrigerant charge amounts inthe spaces provided on the “Refrigerant amount” plate on the outdoor unit.Calculation of additional refrigerant charge

Calculate the additional charge using the liquid pipe size and length of the extended piping and total capacity of connected indoor units. Calculate the additional refrigerant charge using the procedure shown to the right, and charge with the additional refrigerant.For amounts less than 0.2lb [0.1 kg], round up the

calculated additional refrigerant charge.(For example, if the calculated charge is 13.2 lb [6.01 kg], round up the charge to 13.4 lb [6.1 kg].)

Liquid Line

Gas Line

Piping Diameter (in [mm])Model

Liquid Line (in [mm]) Gas Line (in [mm])5/8 [{15.88]3/8 [{9.52]

Liquid LineGas Line

Liquid LineGas Line

Piping Diameter (in [mm])Model number

18 or lower

24 to 54

1/4 [{6.35]1/2 [{12.7]3/8 [{9.52]5/8 [{15.88]

(1) Refrigerant Piping Diameter In Section From Outdoor Unit to First Branch (Outdoor Unit Piping Diameter)



3/8 [{9.52]

5/8 [{15.88]PUMY-P36PUMY-P48


+


ø6.35 ø9.52[ft] × 0.21 [oz/ft](m) × 19.0 (g/m)

[ft] × 0.55 [oz/ft](m) × 50.0 (g/m)


+



– 27 kBTU/h 53 oz (1.5 kg)

28 – 54 kBTU/h 88 oz (2.5 kg)



[40 × 19.0 + 45 × 50.0 + 2.5 = 5.6 kg (rounded up)]1000 1000






10 LBS. 9 OZ. (4.8 kg)

132 ft × 0.21 oz + 147 ft × 0.55 oz + 88 oz = 197 oz

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Method of Combined Branching of Lines andHeadersConnection Examples(Connecting to 5 Indoor Units)

Outdoor unit

First branching (branchingjoint)

Branching joint

Indoor unit

Branching header

Blind caps

A

B

C

D

E

F

A+B+C+a+b+c+d+e is 984 ft [300 meters] A+B+b is 492 ft [150 meters] *B+b is 98 tf [30 meters]164 ft [50 meters] (If the outdoor unit is lower, 131 ft [40 meters])49 ft [15 meters]Please select branching kit, which is sold separately, from the table below.(The kit comprises sets for use with liquid pipes and for use with gas pipes.)


PermissibleLength


(L)(R)(H)(h)

Selecting the Refrigerant Branch Kit

Select Each Section of Refrigerant Piping


(1) Section From Outdoor Unit to First Branch (A)(2) Sections From Branch to Indoor Unit (a,b,c,d,e)(3) Section From Branch to Branch (B,C)


Branch JointCMY-Y62-G-E

Branch Header (4 branches)CMY-Y64-G-E

Branch Header (8 branches)CMY-Y68-G-E

Additional refrigerant chargeRefrigerant for the extended piping is not included in the outdoor unit when the unit is shipped from the factory. Therefore, charge each refrigerant piping system with additional refrigerant at the installation site. In addition, in order to carry out service, enter the size and length of each liquid pipe and additional refrigerant charge amounts inthe spaces provided on the “Refrigerant amount” plate on the outdoor unit.Calculation of additional refrigerant charge

Calculate the additional charge using the liquid pipe size and length of the extended piping and total capacity of connected indoor units. Calculate the additional refrigerant charge using the procedure shown to the right, and charge with the additional refrigerant.For amounts less than 0.2 lb [0.1 kg], round up the

calculated additional refrigerant charge.(For example, if the calculated charge is 13.2 lb [6.01 kg], round up the charge to 13.4 lb [6.1 kg].)


B

A

E

F

C D

D D D

D

A

C

b

B 3H

h

4

L

R

5

1

2

c d e

a

Note: Pipe re-branching after the header branching is not possible.

Liquid Line

Gas Line

Piping Diameter(inch [mm])Model

Liquid Line (inch [mm]) Gas Line (inch [mm])5/8 [{15.88]3/8 [{9.52]

Liquid LineGas Line

Liquid LineGas Line

Piping Diameter(inch [mm])Model number

18 or lower

24 to 54

1/4 [{6.35 ]1/2 [{12.7]3/8 [{9.52]5/8 [{15.88]

(1) Refrigerant Piping Diameter In Section From Outdoor Unit to First Branch (Outdoor Unit Piping Diameter)



3/8 [{9.52]

5/8 [{15.88]PUMY-P36PUMY-P48


+


ø6.35 ø9.52[ft] × 0.21 [oz/ft](m) × 19.0 (g/m)

[ft] × 0.55 [oz/ft](m) × 50.0 (g/m)


+



– 27 kBTU/h 53 oz (1.5 kg)

28 – 54 kBTU/h 88 oz (2.5 kg)



[40 × 19.0 + 45 × 50.0 + 2.5 = 5.6 kg (rounded up)]1000 1000






10 LBS. 9 OZ. (4.8 kg)

132 ft × 0.21 oz + 147 ft × 0.55 oz + 88 oz = 197 oz

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10-2. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE10-2-1. IntroductionR410A refrigerant of this air conditioner is non-toxic and non-flammable but leaking of large amount from an indoor unit into the room where the unit is installed may be deleterious. To prevent possible injury, the rooms should be large enough to keep the R410A concentration specified by ISO 5149-1 as follows.

Note:When single refrigeration system consists of several inde-pendent refrigeration circuit, figure out the total refrigerant amount by each independent refrigerant circuit.

Follow (1) to (3) to confirm the R410A concentration and take appropriate treatment, if necessary.(1) Calculate total refrigerant amount by each refrig-

erant system. Total refrigerant amount is pre-charged refrigerant at ex-factory plus additional charged amount at field installation.

(2) Calculate room volumes (m3) and find the room with the smallest volumeThe part with represents the room with the smallest volume.

If the calculation results do not exceed the maximum con-centration, perform the same calculations for the larger second and third room, etc., until it has been determined that nowhere the maximum concentration will be exceeded.

Indoor unit

All refrigerant of this system will leak out to thisroom if there is leakage at this indoor unit.

Directionof refrigerant flow

Outdoor unit

Branching header

Maximum concentrationMaximum refrigerant concentration of R410A of a room is 0.44kg/K accordance with ISO 5149-1. To facilitate calculation, the maximum concentration is expressed in units of kg/K [lbs/ft³] (kg [lbs] of R410A per K [ft³])

(ISO 5149-1)

Maximum concentration of R410A: 0.027 lbs/ft³ [0.44 kg/K]

10-2-2. Confirming procedure of R410A concentration

(b) There are partitions, but there are openings that allow the effective mixing of air.

(c) If the smallest room has mechanical ventilation apparatus that is linked to a household gas detection and alarm device, the calculations should be performed for the second smallest room.

Total refrigerant in the refrigerating unit (lbs [kg]) [ Maximum concentration(lbs/ft³ [kg/K])The smallest room in which an indoor unit has been installed (ft³ [K]) Maximum concentration of R410A:0.027 lbs/ft³ [0.44kg/K]

(a) Situation in which there are no partitions

(3) Use the results of calculations (1) and (2) to calculate the refrigerant concentration:

Indoor unit

The smallestroom

The secondsmallest room

Outdoor unitVentilation apparatus

Indoor unit

Opening

Wall

Outdoor unit

(Situation in which thereare no door openings orin which there are open-ings above and blowdoors that occupy atleast 0.15% of the floorarea)

Indoor unit

Outdoor unit

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OPERATING PROCEDURE1. Removing the service panel and top panel

(1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service panel.

(2) Remove screws (3 for front, 3 for rear/5 × 12) of the top panel and remove it.

2. Removing the fan motor (MF1, MF2)(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove 4 fan grille fixing screws (5 × 12) to detach the

fan grille. (See Figure 1)(4) Remove a nut (for right handed screw of M6) to detach

the propeller. (See Photo 1.)(5) Disconnect the connectors, CNF1 and CNF2 on multi con-

troller circuit board in electrical parts box.(6) Remove 4 fan motor fixing screws (5 × 20) to detach the

fan motor. (See Photo 2)

Photo 33. Removing the electrical parts box(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Disconnect the connecting wire from terminal block.(4) Remove all the following connectors from multi controller circuit board;

<Diagram symbol in the connector housing>• Fan motor (CNF1, CNF2) • Thermistor <Hic pipe> (TH2) • Thermistor <Outdoor liquid pipe> (TH3) • Thermistor <Compressor> (TH4) • Thermistor <Suction pipe/Ambient, Outdoor> (TH7/6)• High pressure switch (63H) • High pressure sensor (63HS) • Low pressure sensor (63LS) • 4-way valve (21S4) • Bypass valve (SV1)• Electronic expansion valve (LEV-A, LEV-B)Pull out the disconnected wire from the electrical parts box.

(5) Remove the terminal cover and disconnect the compressor lead wire from the comp. terminal. (See Figure 2.)

Note: The terminal cover can be easily removed by using a blade of flathead screwdriver.

Figure 1

PUMY-P36NKMU1(-BS)PUMY-P48NKMU1(-BS)

Electrical parts box

Terminal block(TB1)

Terminal cover

Cover panel (Front)

Cover panel fixing screws

Compressor (MC)

Valve bed

Valve bed fixing screws

Side panel (R)

Multi controllerboard (MULTI.B)

Terminal block(TB3) (TB7)

Photo 1Propeller Front panel

Nut

Photo 2

Top panel fixing screws Top panel

Service panelfixing screws

Service panelFan grille

Grille fixing screws

Grille fixing screws

Slide

Service panelfixing screw

Front panel fixing screws (5x12)

Front panelfixing screws (4x10)

Front panel fixing screws (5x12)

Note: Turn OFF the power supply before disassembly.

Continue to the next page

Fan motor fixing screws

Fan motor

Fan motor fixing screws

Figure 2

Terminal cover

Comp. terminalCover panel (Rear)

11 DISASSEMBLY PROCEDURE

PHOTOS & ILLUSTRATION

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OPERATING PROCEDUREPhoto 4

(6) Remove 2 electrical parts box fixing screws (4 × 10) and detach the electrical parts box by pulling it upward. The electrical parts box is fixed with 2 hooks on the left and 1 hook on the right.

From the previous page.

Photo 54. Removing the thermistor <Suction pipe> (TH6)(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Disconnect the connector, TH7/6 (red), on the Multi control-

ler circuit board in the electrical parts box.(4) Loosen the wire clamps on top of the electrical parts box.(5) Pull out the thermistor <Suction pipe> (TH6) from the sen-

sor holder.

Note: When replacing thermistor <Suction pipe> (TH6), replace it together with thermistor <Ambient> (TH7) since they are combined together. Refer to procedure No.5 below to remove thermistor <Ambient> (TH7).

5. Removing the thermistor <Ambient> (TH7)(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Disconnect the connector TH7/6 (red) on the multi controller

circuit board in the electrical parts box.(4) Loosen the wire clamps on top of the electrical parts box.

(See Photo 5.)(5) Pull out the thermistor <Ambient> (TH7) from the sensor

holder.

Note: When replacing thermistor <Ambient> (TH7), replace it together with thermistor <Suction pipe> (TH6), since they are combined together. Refer to procedure No.4 above to remove thermistor <Suction pipe> (TH6).

Photo 7Lead wire of thermistor <Ambient> (TH7)

Sensor holder

Photo 6

Electricalparts box

Clamps

High pressure sensor (63HS)

Thermistor <Suction pipe> (TH6)

Thermistor <Compressor> (TH4)

Thermistor<Hic pipe> (TH2)

Ball valve and stop valve fixing screws

PHOTOS


Electricalparts boxfixingscrews

OCH612

Photo 9

4-way valve coil (21S4) 4-way valve

4-way valve coil fixing screw

121

7. Removing the 4-way valve coil (21S4) (1) Remove the service panel. (See Figure 1)

[Removing the 4-way valve coil](2) Remove 4-way valve coil fixing screw (M5 × 7).(3) Remove the 4-way valve coil by sliding the coil toward you.(4) Disconnect the connector 21S4 (green) on the multi control-

ler circuit board in the electrical parts box.

OPERATING PROCEDURE PHOTOSPhoto 86. Removing the thermistor <Outdoor liquid pipe> (TH3) and

thermistor <Compressor> (TH4), thermistor <Hic pipe> (TH2)(1) Remove the service panel. (See Figure 1)(2) Disconnect the connectors, TH3 (white) and TH4 (white),

TH2 (black) on the multi controller circuit board in the elec-trical parts box.

(3) Loosen the clamp for the lead wire in the rear of the electri-cal parts box.

(4) Pull out the thermistor <Outdoor liquid pipe> (TH3) and thermistor <Compressor> (TH4) from the sensor holder.

(See Photo 6 and 8)

8. Removing the 4-way valve(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the electrical parts box. (See Photo 4)(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve

and stop valve fixing screws (5 × 16) and then remove the valve bed. (See Photo 3 and 6)

(5) Remove 2 cover panel fixing screws (5 x 12), then slide the cover panel (front) upward to remove it.

(The cover panel (front) is fixed to the cover panel (rear) with a hook on the rear side. (See Photo 3)

(6) Remove the cover panel (rear) fixing screws (2 for right side and 2 for rear/ 5 x 12), then slide the cover panel (rear) upward to remove it. (See Photo 3)

(The cover panel (rear) is fixed to the side panel (R) with 2 screws.)

(7) Remove 3 side panel (R) fixing screws (5 × 12) in the rear of the unit, then slide the side panel (R) upward to remove it. (The side panel (R) is fixed to the side plate with hooks on the rear side.)

(8) Remove the 4-way valve coil. (See Photo 9)(9) Recover refrigerant.(10) Remove the welded part of 4-way valve.

Note 1: Recover refrigerant without spreading it in the air.Note 2: The welded part can be removed easily by remov-

ing the side panel (R).Note 3: When installing the four-way valve, cover it with a

wet cloth to prevent it from heating (120°C or more), then braze the pipes so that the inside of pipes

are not oxidized.

Thermistor <Outdoor liquid pipe> (TH3)

OCH612

122

OPERATING PROCEDURE PHOTOS9. Removing bypass valve coil (SV1) and bypass valve

(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the cover panel (front). (Refer to procedure 8 (5))(4) Remove the cover panel (rear). (Refer to procedure 8 (6))(5) Remove the side panel (R). (Refer to procedure 8 (7))(6) Remove the bypass valve coil fixing screw (M4 × 6).(7) Remove the bypass valve coil by sliding the coil upward.(8) Disconnect the connector SV1 (gray) on the multi controller

circuit board in the electrical parts box.(9) Remove the electrical parts box. (See Photo 4)(10) Recover refrigerant.(11) Remove the welded part of bypass valve.

Refer to the notes below.

Photo 10

10. Removing the high pressure switch (63H) and high pres-sure sensor (63HS)

(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the cover panel (front). (Refer to procedure 8 (5))(4) Remove the cover panel (rear). (Refer to procedure 8 (6))(5) Remove the side panel (R). (Refer to procedure 8 (7))(6) Pull out the lead wire of high pressure switch and high pres-

sure sensor.(7) Remove the electrical parts box. (See Photo 4)(8) Recover refrigerant.(9) Remove the welded part of high pressure switch and high

pressure sensor. Refer to the notes below.

11. Removing the low pressure sensor (63LS)(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the cover panel (front). (Refer to procedure 8 (5))(4) Remove the cover panel (rear). (Refer to procedure 8 (6))(5) Remove the side panel (R). (Refer to procedure 8 (7))(6) Disconnect the connector 63LS (blue) on the multi controller

circuit board in the electrical parts box. (7) Remove the electrical parts box. (See Photo 4)(8) Recover refrigerant.(9) Remove the welded part of low pressure sensor.

Refer to the notes below.

12. Removing electrical expansion valve (LEV-A, LEV-B)(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the cover panel (front). (Refer to procedure 8 (5))(4) Remove the cover panel (rear). (Refer to procedure 8 (6))(5) Remove the side panel (R). (Refer to procedure 8 (7))(6) Remove the electrical expansion valve coil. (See Photo 10,11)(7) Remove the electrical parts box. (See Photo 4)(8) Recover refrigerant.(9) Remove the welded part of electrical expansion valve.

Refer to the notes on the right.

Photo 11

Low pressure sensor (63LS)

Electronic expansion valve coil (LEV-A)

Electronic expansion valve

High pressure sensor (63HS)

High pressure switch (63H) Low pressure

sensor (63LS)

Bypass valve coil fixing screw

Electronic expansion valve coil (LEV-B)

Bypass valve coil (SV1)

Bypass valve

Electronic expansion valve

Notes:1. Recover refrigerant without spreading it in the air.2. The welded part can be removed easily by removing

the side panel (R).3. When installing the following parts, cover it with a

wet cloth to prevent it from heating as the tempera-ture below, then braze the pipes so that the inside of pipes are not oxidized;• Bypass valve (procedure 9), 248-F [120°C] or more• High pressure switch and high pressure sensor

(procedure 10), 212-F [100°C] or more• Low pressure sensor (procedure 11), 212-F [100°C]

or more• LEV (procedure 12), 248-F [120°C] or more

OCH612

123

Accumulator

OPERATING PROCEDURE PHOTOS & ILLUSTRATION13. Removing the compressor (MC)

(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove 2 front cover panel fixing screws (5 × 12) and

remove the front cover panel. (See Photo 3)(4) Remove front panel fixing screws, 5 (5x12) and 2 (4 x 10)

and remove the front panel. (See Photo 3)(5) Remove 4 back cover panel fixing screws (5 × 12) and

remove the back cover panel.(6) Remove the electrical parts box. (See Photo 4)(7) Remove the valve bed. (Refer to procedure 8 (4))(8) Remove the cover panel (front). (Refer to procedure 8 (5))(9) Remove the cover panel (rear). (Refer to procedure 8 (6))(10) Remove the right side panel. (Refer to procedure 8 (7))(11) Remove 3 separator fixing screws (4 × 10) and remove the

separator. (See Figure 3) (12) Recover refrigerant.(13) Remove the 3 compressor fixing nuts for motor using span-

ner or adjustable wrench.(14) Remove the welded pipe of motor for compressor inlet and

outlet and then remove the compressor.

Note: Recover refrigerant without spreading it in the air.

Photo 13

Compressor (MC)

Valve bed

Valve bed fixing screw

Valve bed fixing screws

Compressor fixing nut

14. Removing the accumulator(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the front cover panel. (Refer to procedure 13 (3))(4) Remove the back cover panel. (Refer to procedure 13 (5))(5) Remove the electrical parts box. (See Photo 4)(6) Remove the valve bed. (Refer to procedure 8 (4))(7) Remove the cover panel (front). (Refer to procedure 8 (5))(8) Remove the cover panel (rear). (Refer to procedure 8 (6))(9) Remove the side panel (R). (Refer to procedure 8 (7))(10) Recover refrigerant.(11) Remove 2 welded pipes of accumulator inlet and outlet.(12) Remove 2 accumulator leg fixing screws (4 × 10). (See Photo 15)

Photo 14 Photo 15Inlet

Outlet

Separator

Accumulator

Accumulator leg

Accumulator leg fixing screws

Accumulator

Figure 3

Separator fixing screws

Separator fixing screw

Note: Recover refrigerant without spreading it in the air.

OCH612

124

OPERATING PROCEDURE

Reactor


Figure 4

Screwsfor reactor

Connectors ofreactor

15. Removing the reactor (DCL)(1) Remove the service panel. (See Figure 1)(2) Remove the top panel. (See Figure 1)(3) Remove the electrical parts box (See photo 4)(4) Remove 4 screws for reactor (4 x 10) to remove the reac-

tor. (See Figure 4)

Bottom plate of electrical parts box

ILLUSTRATION

OCH612

125OCH612

cCopyright 2016 MITSUBISHI ELECTRIC CORPORATIONDistributed in May 2016 No.OCH612Made in Japan

New publication, effective May 2016Specifications are subject to change without notice.

HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN

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