Air-to-Water Heatpump Product Training SDC & SDF Series 22nd – 23rd July 2010.

Air-to-Water Heatpump

Product TrainingSDC & SDF Series

22nd – 23rd July 2010

ContentContent of Product Training

• Product Line Up• System of Model Number• Product Feature• Product Specification• Product Dimension• Product Operating Condition• Competitors Product Comparison• Location of Controls & Components• Refrigeration Cycle & Water Circuit• System Configuration• Block & Wiring Diagrams• Indoor Unit Installation• Optional External Device Installation• Operation & Control • Servicing Mode• Self-diagnosis Method

Product Line Up

ContentProduct Line Up

7kW 9kW 12kW 14kW 16kW

Indoor Unit

WH-SDC07C3E5

WH-SDF07C3E5

WH-SDC09C3E5

WH-SDF09C3E5

WH-SDC12C6E5

WH-SDF12C6E5

WH-SDC14C6E5

WH-SDF14C6E5

WH-SDC16C6E5

WH-SDF16C6E5

Outdoor Unit

WH-UD07CE5-A WH-UD09CE5-A WH-UD12CE5-A WH-UD14CE5-A WH-UD16CE5-A

System of Model Number

WH S D F 07 C 3

Heat exchange unit

E


5

Indoor Unit

WH : Air-to-Water

S : Split-type

D : Standard

F : Heating Only ; C : Heating & Cooling

Heating Capacity (kW)

Generation (Development Sequence)

Backup Heater Size (3: 3kW ; 6: 6kW)

Destination (E: Europe)

Power Source (5: Single Phase ; 8: Three Phase)

WH U D 07 C E 5

Heat exchange unit


Outdoor Unit

WH : Air-to-Water

U : Split-type

D : Standard

Heating Capacity (kW)

Generation (Development Sequence)

Destination (E: Europe)

Power Source (5: Single Phase ; 8: Three Phase)

A

Connectivity (A: SDF or SDC indoor unit)

Product Feature

353mm

ContentProduct Feature

Top Class Energy Saving & Compact Heat Exchanger Unit in Industry

Optimized use of Air-to-Air Heat Pump technology to realize up to COP 4.67* Panasonic Air-to-Water

* EUROVENT standard (7oC outdoor ambient temperature / 35oC leaving water temperature) for 16.0kW model

Space saving installation with compact design of heat exchanger unit (total volume 0.158m3)

502mm

892mm

Volume ratio compare with Daikin Altherma 51%, Toshiba Estia 52%, Hitachi AquaFree

53% & Fujitsu General 58%


Flexible Application & Easy Installation of Heat Pump Unit

Optimize design for installation space. Long pipe specification improves the flexibility for long piping

installation up to 40m* & height difference up to 30m*

Pipe connection flexibility allow outdoor pipe connection in four directions (front, bottom, side, rear)

to indoor heat exchanger unit

FrontBottom

Side

Rear* for the 12kW, 14kW and 16.0kW models

Maximum 40m Pipe Length

Maximum 30m Height Difference


Easy Maintenance, Monitoring Operation of Heat Exchanger Unit &

Weekly Timer

Front maintenance design of heat exchanger unit allow front panel to be opened or closed by just three screws. Thus, service or maintenance is convenient

Easy monitoring of operation status (OFF/ON, outdoor & water inlet & outlet temperatures, abnormality) from

the front control panel of heat exchanger unit

Control Panel

It is possible to program operation in accordance with the typical weekly schedule (6 programs per day and

42 programs per week)


Wide Range (7kW ~ 16kW), Flexibility & High Connectivity to Existing or

New Installation

The Aquarea offer wide ranges (7kW ~ 16kW) that adapt just as well to an existing installation as boiler backup or to a new installation with radiant floor, low-

temperature radiators or even fan-coil (in heating and cooling for the SDC models). These ranges also allow connect to a solar kit to increase efficiency and

minimise the impact of ecosystem.

Product Specification


Indoor Unit Specification (SDC)

Specification items 7kW 9kW 12kW 14kW 16kW

Noise leveldB (A) C/H : 30

Power Level dB C/H : 43

Dimension

Height mm 892

Width mm 502

Depth mm 353

Net weight kg 45 51

Refrigerant pipe diameter

Liquid mm (inch) 6.35 (1/4) 9.52 (3/8)

Gas mm (inch) 15.88 (5/8)

Water pipe diameter

Inlet mm (inch) 28.00 (1-3/32)

Outlet mm (inch) 28.00 (1-3/32)

Water drainage diameter mm (inch) 15.00 (19/32)

Water pump

Motor type Capacitor Run Induction (2.5uF) Capacitor Run Induction (5uF)

No. of speed 3

Input power W 100 190

Water flow rate l/min C: 17.6; H: 20.1 C: 20.4; H: 25.8 C: 28.7; H: 34.4 C: 33.0; H: 40.1 C: 35.0; H: 45.9

Pressure relief valve kPa Open: 190; Close: 183 and below

Protective device (RCCB) A 40

Expansion vessel volume l 10

Electrical heater kW 3.00 6.00


Indoor Unit Specification (SDF)


Noise leveldB (A) 30

Power Level dB 43

Dimension

Height mm 892

Width mm 502

Depth mm 353

Net weight kg 43 49


Liquid mm (inch) 6.35 (1/4) 9.52 (3/8)

Gas mm (inch) 15.88 (5/8)

Water pipe diameter

Inlet mm (inch) 28.00 (1-3/32)

Outlet mm (inch) 28.00 (1-3/32)

Water drainage diameter mm (inch) 15.00 (19/32)

Water pump

Motor type Capacitor Run Induction (2.5uF) Capacitor Run Induction (5uF)

No. of speed 3

Input power W 100 190

Water flow rate l/min 20.1 25.8 34.4 40.1 45.9

Pressure relief valve kPa Open: 190; Close: 183 and below

Protective device (RCCB) A 40

Expansion vessel volume l 10

Electrical heater kW 3.00 6.00

Heat exchange unit


Outdoor Unit Specification (SDC)


*Cooling capacity kW 6.00 7.00 10.00 11.50 12.20

EER W/W 2.61 2.41 2.78 2.61 2.54

*Heating capacity kW 7.00 9.00 12.00 14.00 16.00

*COP W/W 4.40 4.10 4.67 4.50 4.23

Noise leveldB (A) C/H: 48 C: 50; H: 49 C/H: 50 C: 52; H: 51 C: 54; H: 53

Power Level dB C/H: 66 C: 68; H: 67 C: 68; H: 67 C: 70; H: 68 C: 72; H: 70

Dimension

Height mm 795 1340

Width mm 900

Depth mm 320

Net weight kg 66 106

Refrigerant control device Expansion valve

Refrigerant oil cm3 FV50S (900) FV50S (1200)

Refrigerant (R410A) kg 1.45 2.75


Liquid mm (inch) 6.35 (1/4) 9.52mm (3/8)

Gas mm (inch) 15.88 (5/8)

Standard pipe length m 7

Pipe length range m 3 ~ 30 3 ~ 40

Maximum height difference m 20 30


Outdoor Unit Specification (SDC)


Additional gas charging g/m 30 50

Refrigerant chargeless m 10 30

Compressor

Type Hermetic motor

Motor type Brushless (4-pole)

Rated output kW 1.70 3.00

Fan

Type Propeller fan

Motor type Transistor (8-pole)

Output power W 60

Speed RPM C: 670; H: 580 C: 700; H: 640

C: 600 (top); 640 (bottom)

H: 510 (top); 550 (bottom)

C: 630 (top); 670 (bottom)

H: 540 (top); 580 (bottom)

C: 630 (top); 670 (bottom)

H: 580 (top); 620 (bottom)

Heat exchange unit


Outdoor Unit Specification (SDF)


*Heating capacity kW 7.00 9.00 12.00 14.00 16.00

*COP W/W 4.40 4.10 4.67 4.50 4.23

Noise leveldB (A) 48 49 50 51 53

Power Level dB 66 67 67 68 70

Dimension

Height mm 795 1340

Width mm 900

Depth mm 320

Net weight kg 66 106

Refrigerant control device Expansion valve

Refrigerant oil cm3 FV50S (900) FV50S (1200)

Refrigerant (R410A) kg 1.45 2.75


Liquid mm (inch) 6.35 (1/4) 9.52mm (3/8)

Gas mm (inch) 15.88 (5/8)

Standard pipe length m 7

Pipe length range m 3 ~ 30 3 ~ 40

Maximum height difference m 20 30


Outdoor Unit Specification (SDF)


Additional gas charging g/m 30 50

Refrigerant chargeless m 10 30

Compressor

Type Hermetic motor

Motor type Brushless (4-pole)

Rated output kW 1.70 3.00

Fan

Type Propeller fan

Motor type Transistor (8-pole)

Output power W 60

Speed RPM 580 640510 (top); 550

(bottom)540 (top); 580

(bottom)580 (top); 620

(bottom)

Product Dimension

Heat exchange unit

Product Dimension

Indoor Unit Dimension (7kW ~ 16kW)

Unit: mm

Heat exchange unit

Product Dimension

Outdoor Unit Dimension (7kW ~ 9kW)

Unit: mm

30cm

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Product Dimension

Outdoor Unit Dimension (12kW ~ 16kW)

Unit: mm

30cm

Product Operating Condition

Heat exchange unit


Indoor Outdoor

Water outlet temperature (oC) Ambient temperature (oC)

CoolingMaximum 20 43

Minimum 5 16

Heating Maximum 55 35

Minimum 25 -20


When outdoor temperature is out of the above temperature range, the cooling or heating capacity will drop significantly and outdoor unit might stop for protection control.

Location of Controls & Components


Indoor Unit Control Panel (7kW ~ 16kW)

3

7 6 4

25

5

11

12

24

23

2

1

8

9

10

13

* for the SDF control panel, there’s no Cool Mode Indicator

*


19

17

22

162120151418


* for the SDF control panel, there’s no Water set temperature during cool mode (5oC ~ 20oC)

*


19

17

22

162120151418


* for the SDF control panel, there’s no Cool + Tank and Cool Mode selection

*

Heat exchange unit

Indoor Unit Components


(Activate when water pressure exceeds 0.20MPa)

(10L)

Refrigeration Cycle & Water Circuit

Heat exchange unit

Refrigeration Cycle & Water Circuit

System Configuration

Block & Wiring Diagrams


Indoor Unit & Outdoor Unit Block Diagram (7kW ~ 9kW)


Indoor Unit & Outdoor Unit Block Diagram (12kW ~16kW)

Heat exchange unit


Indoor Unit Wiring Diagram (7kW ~ 9kW)

Heat exchange unit


Indoor Unit Wiring Diagram (12kW ~ 16kW)

Heat exchange unit


Outdoor Unit Wiring Diagram (7kW ~ 9kW)

Heat exchange unit


Outdoor Unit Wiring Diagram (12kW ~ 16kW)

Indoor Unit Installation (7kW ~ 16kW)

Heat exchange unit

Indoor Unit Installation

Indoor Unit Installation DiagramIMPORTANT: Cover refrigerant circuit’s tube connectors and pipes properly to prevent water or moisture from entering the circuit during installation and service work. Failing to do so may cause the system to malfunction.

* For SDF models, 2-way valve cable is NOT required

Ø28.00mm (1-3/32”)

Ø28.00mm (1-3/32”)

Heat exchange unit


How to Fix Installation Plate

Heat exchange unit


Install The Indoor Unit

Heat exchange unit


Water Pipe Installation

1. The minimum requirement of water in the system is 30 litres (for 7kW ~ 9kW models) and 50 litres (for 12kW ~ 16kW models). If this value could not be achieved, please install additional buffer tank (field supply).

2. Cover the pipe end to prevent dirt and dust when inserting it through wall.

3. Must install an external filter (30 mesh or more, field supply) before water inlet connector of indoor unit (indicated with “WATER IN”).

4. Use Rp 1-1/4” nut for both water inlet and water outlet connection and clean all piping with tap water before install.

5. Be sure to use two spanners to tighten the connection with 117.6N.m torque. Over tightening will cause water leakage.

6. Make sure to insulate the water circuit pipes to prevent reduction of heating and cooling capacity.

7. Mount the PS foam and long banding strap (factory supply as accessory for SDC models) to water inlet and water outlet connectors.

* Only applicable for SDC models.

Heat exchange unit


Drain Hose Installation

Heat exchange unit


Drain Elbow & Hose Installation (for SDC models only)

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Electrical Cable Connection (7kW ~ 9kW)

(4 x 4.0 or 6.0mm2)

(3 x 4.0mm2)

(3 x 4.0 or 6.0mm2)

Power Supply 1 - For indoor and outdoor units.

Power Supply 2 - For indoor unit backup heater (3kW) and tank unit booster heater (3kW)

Terminal board for external device connection

Heat exchange unit


Electrical Cable Connection (12kW ~ 16kW)

(4 x 4.0 or 6.0mm2)

(3 x 4.0 or 6.0mm2)

(3 x 1.5mm2)

Power Supply 1 - For indoor and outdoor units.

Power Supply 2 - For indoor unit backup heater (6kW)Power Supply 3 - For tank unit booster heater (3kW)

(3 x 4.0mm2)

Terminal board for external device connection

Heat exchange unit


Electrical Cable for Optional External Device (Field Supply)

* for the SDC models

Heat exchange unit


Optional External Device Connecting Requirement

Maximum output power of tank booster heater should be ≤ 3kW.

Install a solar connection PCB (CZ-NS1P) when solar station is utilized.

Must connect a jumper between terminal no.13 & no.14, when there’s

no tank OLP connection.

* for the SDC models

1-pole (min 3.0mm contact gap)

Optional External Device Installation


(a) External Room Thermostat

Recommended external room thermostat:

To connect an external room thermostat, make

sure set the external thermo controller connection to YES

through Special Functions Setting

REMOTE indication will display when external thermo controller

connection is set to YES

REV200


(a) External Room Thermostat


(b) 3- Way Valve Control

Recommended 3- way valve kit:

3-way valve function:

To change the flow direction of hot/cold water to room side or hot water to tank side.

(Room Side)

(AB -> A: CLOSE)

VXI46/25

(AB -> B: OPEN)

(Tank Side)

1. During STOP/HEAT/COOL/FORCE HEATER/PUMPDOWN MODE, relay is default at terminal no.04. (AB -> B: OPEN)

2. During TANK MODE, relay is switched to terminal no.05. (AB -> A: OPEN)

SFA21/18


(c) 2- Way Valve Control (for SDC models only)

Recommended 2- way valve kit:

2-way valve function:

To allow hot water to radiant floor and/or radiator or to block cold water to radiant floor and/or radiator.

SFA21/18

VVI46/25

(A -> AB: CLOSE)

1. During STOP/TANK/COOL/PUMPDOWN MODE, relay is default at terminal no.01. (A -> AB: CLOSE)

2. During HEAT/FORCE HEATER MODE, relay is switched to terminal no.02. (A -> AB: OPEN)

(radiant floor/radiator)


(c) Solar Connection PCB (CZ-NS1P) & Control

1. When solar station pump P2 OFF, CZ-NS1P relay is default at terminal no.20. AB -> A (CLOSE) and tank unit is not heat-up by solar station.

2. When solar station pump P2 ON, CZ-NS1P relay will switch to terminal no.21. AB -> A (OPEN) and tank unit is heat-up by solar station.

Connecting cable length must NOT exceed 10m !

Operation & Control

Operation & Control

(a) Cool Mode Operation (only for the SDC models)

OFF OFF

1. Thermostat OFF: water outlet temp. < water set temp. - 1.5oC (continuously for 3 mins).

2. Thermostat ON: water outlet temp. > water inlet temp. (at the time of thermostat OFF is triggered) + 3 oC (3 mins delay restart).

3. Solar OFF: tank temp. > 77oC; Solar ON: tank temp. < 70oC.

4. Indoor water pump always ON.

Backup & Booster Heaters

Heat exchange unit

Operation & Control

(b) Cool + Tank Mode Operation (only for the SDC models)

1. Thermostat OFF: water outlet temp. < water set temp. - 1.5oC (continuously for 3 mins).

2. Thermostat ON: water outlet temp. > water inlet temp. (at the time of thermostat OFF is triggered) + 3 oC (3 mins delay restart).

3. Solar OFF: tank temp. > 77oC; Solar ON: tank temp. < 70oC.

4. Indoor water pump always ON.

OFF OFF

Operation & Control

(c) Heat Mode Operation

OFF ON

1. Thermostat OFF: water outlet temp. > water set temp. + 2.0oC (continuously for 3 mins).

2. Thermostat ON: water outlet temp. < water inlet temp. (at the time of thermostat OFF is triggered) - 3 oC (3 mins delay restart).

3. Backup heater OFF: water outlet temp. > water set temp. - 2oC (continuously for 15 secs).

4. Backup heater ON: water outlet temp. < water set temp. - 8oC AND after 20 mins since previous OFF.

Booster Heater

Operation & Control

(d) Tank Mode Operation

ON OFF

1. Water set temp. = tank set temp. or 55oC whichever is lower.

2. Thermostat OFF: tank temp. > water set temp. + 2oC (continuously for 3 mins).

3. Thermostat ON: tank temp. < water set temp. - 3oC AND water pump ON for 3 mins.

4. Water pump ON: tank temp. < tank temp. (at the time thermostat OFF is triggered) - 3oC.

5. When solar priority is set, heatpump and booster heater OFF when solar request ON.

6. 2 way valve always OFF.

Operation & Control

(d) Tank Mode Operation

ON OFF

1. Water set temp. = tank set temp. or 55oC whichever is lower.

2. Thermostat OFF: tank temp. > water set temp. + 2oC (continuously for 3 mins).

3. Thermostat ON: tank temp. < water set temp. - 3oC AND water pump ON for 3 mins.

4. Water pump ON: tank temp. < tank temp. (at the time thermostat OFF is triggered) - 3oC.

5. 2 way valve always OFF.

If solar priority is not set, solar 3WV ON only after heatpump thermostat OFF.

Operation & Control

(e) Heat + Tank Mode Operation (Heating No Priority)

OFF/ONON

1. During heating heat-up interval, switch to tank heat-up when heating heat-up interval ends, and tank temp. < tank set temp. - 3oC (AND solar 3WV OFF if solar priority is set) is fulfilled

2. During tank heat-up interval, switch to heating heat-up when tank heat-up interval ends OR tank temp. > tank set temp. + 2oC (continuously 3 mins)

3. During heating heat-up interval, backup & booster heaters ON/OFF follows normal operation control

4. Once switch to tank heat-up interval, backup & booster heaters OFF and booster heater delay timer start counting. Booster heater ON after delay timer AND tank temp. < tank set temp.

Operation & Control

(e) Heat + Tank Mode Operation (Heating No Priority)

OFF/ONON

1. During heating heat-up interval, switch to tank heat-up when heating heat-up interval ends, and tank temp. < tank set temp. - 3oC (AND solar 3WV OFF if solar priority is set) is fulfilled

2. During tank heat-up interval, switch to heating heat-up when tank heat-up interval ends OR tank temp. > tank set temp. + 2oC (continuously 3 mins)

3. During heating heat-up interval, backup & booster heaters ON/OFF follows normal operation control

4. Once switch to tank heat-up interval, backup & booster heaters OFF and booster heater delay timer start counting. Booster heater ON after delay timer AND tank temp. < tank set temp.

If solar priority is not set, solar 3WV ON only after switch to heating heat-up interval.

Operation & Control

Setting Water Outlet Temperature (Heat Mode)

Operation & Control

Water Temperature Thermo Shift Setting

Operation & Control

Indoor Unit Backup Heater Control

1. Normal Heat Mode

(i) Backup heater ON condition:

- HEATER button is pressed ON

- After heatpump ON for 30 mins

- After water pump ON for 9 mins

- When outdoor ambient temp. < outdoor set temp. for backup heater

- When water outlet temp. < water set temp. - 8oC

- 20 mins since previous backup heater OFF

(ii) Backup heater OFF condition:

- When outdoor ambient temp. > outdoor set temp. + 2oC (continuously for 15 secs)

- When water outlet temp. > water set temp. + 2oC (continuously for 15 secs)

- When switch to tank heat-up interval

- Water pump OFF

- HEATER button is pressed OFF

- Heatpump thermostat OFF

- Heatpump OFF

2. Force Heat Mode

(i) Backup heater ON condition:

- FORCE button is pressed ON

- After water pump ON for 9 mins

- When water outlet temp. < water set temp. - 8oC

- 20 mins since previous backup heater OFF

(ii) Backup heater OFF condition:

- FORCE button is pressed OFF

- When water outlet temp. > water set temp. - 2oC (continuously for 15 secs)

When heatpump stops due to error protection (except water outlet temp. sensor error, water inlet temp. sensor error, or flow switch error),

backup heater will force ON automatically (even HEATER/FORCE is not selected).

Operation & Control

Tank Unit Booster Heater Control

(i) Tank booster heater ON condition:

- When tank temp. < tank set temp. - 5oC

- 20 mins since previous booster heater OFF

- After booster heater delay timer ON during heatpump startup in TANK MODE OR switching from heating heat-up interval to tank heat-up interval in HEAT + TANK MODE

(ii) Tank booster heater OFF condition:

- When tank temp. > tank set temp. + 2oC (continuously for 15 secs)

- When switch from heating heat-up interval to tank heat-up interval

Tank set temp. + 2oC

Tank set temp. - 5oC

BOOSTER HEATER OFF

BOOSTER HEATER ON

Operation & Control

Sterilization Mode

1. Sterilization mode can be set from Special Functions setting through indoor unit control panel.

2. During sterilization mode, tank unit will be heat-up to the sterilization set temp. for a certain period of time.

3. Sterilization mode can only be set on TIMER to operate once in a week.

4. During heatpump OFF (standby), and in HEAT/COOL mode, sterilization mode will not start.

5. However, sterilization mode will be cancelled when sterilization set temp. is not achieved after 4 hours.

Operation & Control

Solar Operation Control

SOLAR indication will display when solar priority is set to YES during Special Functions

setting from indoor unit control panel

Servicing Mode

Self-diagnosis Method

Heat exchange unit


When abnormality occur during operation, the system will stop operation, and OFF/ON LED will blink and error code will display on control panel system error display LCD. Error code is stored in indoor EEPROM.

- To reset control panel error code memory

STEP: Press and hold ERROR RESET button (< 8 seconds) till a beep sound is heard

- To read past error code stored in indoor EEPROM

STEP 1: Press CHECK button (> 5 seconds) to enter status mode

STEP 2: Press SEARCH UP/DOWN button to retrieve past/last error code

STEP 3: Press CANCEL button or wait 30 seconds to exit status mode

- To permanently erase error code stored in indoor EEPROM

STEP: Press and hold ERROR RESET button (> 8 seconds) till a beep sound is heard

CANCEL Button

ERROR RESET Button

CHECK Button

SEARCH UP/DOWN Button

System Error Display


Diagnosis Table (Indoor Unit Judgment)

Diagnosis Display Abnormality/Protection Control Abnormality Judgment

H90 Indoor / outdoor abnormal communication 60 seconds after operation

F45 Indoor water outlet temperature sensor abnormality Continue for 5 seconds

H23 Indoor refrigerant liquid temperature sensor abnormality Continue for 5 seconds

H62 Water flow switch abnormality Continue for 10 seconds

H76 Indoor - control panel communication abnormality -

F37 Indoor water inlet temperature sensor abnormality Continue for 5 seconds

H12 Indoor / outdoor capacity unmatched 90 seconds after power supply

H72 Tank temperature sensor abnormality Continue for 5 seconds

H70 Indoor backup heater OLP abnormality Continue for 60 seconds

H91 Tank booster heater OLP abnormality Continue for 60 seconds

H99 Indoor heat exchanger freeze prevention -


Diagnosis Table (Outdoor Unit Judgment)


H90 Indoor / outdoor abnormal communication 60 seconds after operation

H15 Outdoor compressor temperature sensor abnormality Continue for 5 seconds

F46 Outdoor current transformer open circuit -

F36 Outdoor air temperature sensor abnormality Continue for 5 seconds

F42 Outdoor heat exchanger temperature sensor abnormality Continue for 5 seconds

F40 Outdoor discharge pipe temperature sensor abnormality Continue for 5 seconds

H95 Indoor / outdoor wrong connection -

H64 Refrigerant high pressure abnormality Continue for 5 seconds

H42 Compressor low pressure abnormality -

F27 Pressure switch abnormality Continue for 60 seconds

H98 Outdoor high pressure overload protection -

F15 Outdoor fan motor lock abnormality 2 times within 30 minutes

F25 Cooling / heating cycle changeover abnormality 4 times within 30 minutes

F41 PFC control 4 times within 10 minutes

F24 Refrigerant cycle abnormality 2 times within 20 minutes


Diagnosis Table (Outdoor Unit Judgment)


F14 Outdoor compressor abnormal rotation 4 times in 20 minutes

F22 IPM overheating protection 3 times in 30 minutes

F20 Outdoor compressor overheating protection 4 times within 30 minutes

F16 Total running current protection 3 times within 20 minutes

F23 Outdoor DC peak detection 7 times continuously

F12 Pressure switch activate 4 times within 20 minutes

F43 Outdoor defrost temperature sensor abnormality Continue for 5 seconds

F95 Cooling high pressure overload protection -


Connection Capability Rank Abnormality (H12)

Malfunction Decision Conditions:

During startup operation of cooling and heating, the capability rank of indoor checked by the outdoor is used to determine connection capability rank abnormality.

Malfunction Caused:

1. Wrong model interconnected.

2. Wrong indoor unit or outdoor unit PCB (main) used.

3. Faulty indoor unit or outdoor unit PCB (main).

Abnormality Judgment:

Continue for 90 seconds.


Connection Capability Rank Abnormality (H12)

Check indoor and outdoor units model number.

Match the compatible model.

No

Troubleshooting:

Is the indoor and outdoor model number matched?

Check the spare part numbers of the indoor and outdoor unit PCBs and compare with their Part Lists.

Matched compatibility?Change for specified indoor or outdoor unit PCB (main).

Yes

No

Yes Replace the indoor and outdoor unit PCBs (main).


Compressor Tank Temperature Sensor Abnormality (H15)


During startup and operation of cooling and heating, the temperatures detected by the compressor tank temperature sensor are used to determine sensor error.

Malfunction Caused:

1. Faulty connector connection.

2. Faulty sensor.

3. Faulty outdoor unit PCB (main).




Compressor Tank Temperature Sensor Abnormality (H15)

Check the compressor tank temperature sensor:- Plug out connector from the outdoor unit PCB (main)- Measure the resistance of the compressor tank temperature sensor

- Defect in compressor tank temperature sensor- Replace the compressor tank temperature sensor

Yes

Troubleshooting:

Is the measured resistance of the compressor tank temperature sensor

matches the value specified in its characteristic chart?

No

Check the CN-TANK connector connection:- Turn OFF the power - Check the connector connection

- Connector poor contact- Correct the connection

NoIs the CN-TANK connector connection normal?

- Defect in outdoor unit PCB (main)- Replace the outdoor unit PCB (main)

Yes


Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23)


During startup and operation of cooling and heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.

3. Faulty indoor unit PCB (main).




Check the indoor refrigerant liquid temperature sensor:- Plug out connector from the indoor unit PCB (main)- Measure the resistance of the indoor refrigerant liquid temperature sensor

- Defect in indoor refrigerant liquid temperature sensor- Replace the indoor refrigerant liquid temperature sensor

Yes

Troubleshooting:For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Is the measured resistance of the indoor refrigerant liquid temperature sensor matches the value specified

in its characteristic chart?

No

Check the CN-TH1 connector connection:- Turn OFF the power - Check the connector connection


NoIs the CN-TH1 connector connection normal?

- Defect in indoor unit PCB (main)- Replace the indoor unit PCB (main)

Yes

Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23)


Compressor Low Pressure Protection (H42)


During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29 oC or above 26oC is detected by the outdoor pipe temperature sensor.

Malfunction Caused:

1. Dust accumulation on the outdoor unit heat exchanger.

2. Air short circuit at outdoor unit.

3. 2 way valve partially closed.

4. Faulty outdoor unit fan motor.

5. Refrigerant shortage (refrigerant leakage).

6. Clogged expansion valve or strainer.

7. Faulty outdoor pipe temperature sensor.



Yes

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

No

Troubleshooting:

Check the dust accumulation on the outdoor unit heat exchanger.

Is the outdoor unit heat exchanger dirty?

Check the outdoor air passage.

Provide sufficient air passage.

YesIs there any short circuit?

No Yes

No

Clean the heat exchanger.Yes

No

Compressor Low Pressure Protection (H42)

Check for gas leakage.

Is the oil oozing out from the 2/3 way valve?

Check for clogged expansion valve or strainer.

Is the expansion valve or strainer clogged (ice

formed)?

- Replace the expansion valve and/or strainer- Reclaim and recharge refrigerant

Yes

- Repair the pipe flare or union nuts- Reclaim and recharge refrigerant

Reclaim and recharge for a specified amount of fresh

refrigerant. - Replace the outdoor unit PCB (main)- Replace the outdoor pipe temperature sensor- Replace the compressor

Yes

No

Is abnormality happened again?

Procedure complete

Is the 2 way valve partially closed?

Open the 2 way valve.

Check the 2-way valve.

Yes

No

Is the outdoor unit fan motor operate normally?

Replace the outdoor unit fan motor and/or outdoor

unit PCB (main).

Check the outdoor unit fan motor operation.

No


Water Flow Switch Abnormality (H62)


During operation of cooling and heating, the water flow detected by the indoor water flow switch is used to determine water flow error.

Malfunction Caused:

1. Faulty water pump.

2. Water leak in system.


4. Faulty water flow switch.



Continue for 10 seconds (but no judgment for 9 minutes after compressor startup/restart).


Water Flow Switch Abnormality (H62)

Check the indoor water flow switch:- Plug out connector from the indoor unit PCB (main)- Dismantle the water flow switch- Position the water flow switch in reverse direction (downward)- Measure the continuity of the water flow switch

- Defect in indoor water flow switch- Replace the indoor water flow switch

Yes


Is there any continuity?No

Check the CN-FLOW connector connection:- Turn OFF the power - Check the connector connection


NoIs the CN-FLOW connector connection normal?


Yes

Check the system water passage.

Fix the system water leakage.

YesIs there any water leakage?

No

Check the system water pump.

Is the water pump working?Replace the faulty water

pump.

Yes

No


Outdoor High Pressure Abnormality (H64)


During operation of cooling and heating, when the outdoor high pressure sensor output signal is 0Vdc or 5Vdc.

Malfunction Caused:


2. Faulty sensor.



Continue 4 times in 20 minutes.


Outdoor High Pressure Abnormality (H64)

Check the continuity of the outdoor unit PCB (main) high pressure sensor connector CN-HPS:- Plug out connector from the outdoor unit PCB (main)- Measure the continuity pin 1 & 3 (GND) and pin 1 & 4 (5V) of CN-HPS

Yes


Yes

Check the CN-HPS connector connection:- Turn OFF the power - Check the connector connection


NoIs the CN-HPS connector connection normal?

No

Is there any continuity?

Reconnect the high pressure sensor connector to the outdoor unit PCB

(main). Turn ON the power and run the system. Measure the DC voltage pin 1

& 3 (GND) of CN-HPS.

Is the measured voltage 0Vdc or 5Vdc?


- Defect in outdoor high pressure sensor- Replace the outdoor high pressure sensor

Yes

No


Indoor Backup Heater OLP Abnormality (H70)



During operation of indoor backup heater, when no power supplies to indoor backup heater or OLP open circuit.

Malfunction Caused:

1. Faulty power supply connector connection.


3. Faulty indoor backup heater overload protector (OLP).






Check indoor backup heater OLP continuity:- Turn OFF power supply- Reset heater 1 OLP- Measure the continuity of OLP

Indoor Backup Heater OLP Abnormality (H70)


Check the indoor backup heater incoming AC power supply (2):- Turn ON power supply (2) & RCCB- Measure the AC voltage between RCCB’s L1 & N1- Measure the AC voltage between PCB’s AC2-L3 & AC2-N2

Is measured voltage 230Vac?

Multimeter to measure continuity

Use a test pen to push this button to reset OLP

- Defect in RCCB- Replace RCCB- Terminal board assembly connector poor contact- Correct the connection or replace the indoor unit PCB (main)

- Defect in indoor backup heater OLP- Replace indoor backup heater OLP

Yes

No

Yes

Check the CN-OLP1 connector connection:- Turn OFF the power - Check the connector connection


Is the CN-OLP1 connector connection normal?


No

Yes

No

Is the abnormality happened during operation of indoor backup heater?


No

Yes


Tank Temperature Sensor Abnormality (H72)


When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.





Check the tank temperature sensor:- Plug out connector from the indoor unit PCB (main)- Measure the resistance of the tank temperature sensor

- Defect in tank temperature sensor- Replace the tank temperature sensor

Yes


Is the measured resistance of the tank temperature sensor matches the

value specified in its characteristic chart?

No

Check the terminal board assembly no. 15 and no. 16, and CN-TH2 connector connections:- Turn OFF the power - Check the connector connections


NoIs the terminal board assembly no.15 and no. 16, and CN-TH2 connector connections normal?


Yes

Tank Temperature Sensor Abnormality (H72)

Is the abnormality happened during tank connection set to ON?


Yes

No


Indoor-Control Panel Communication Abnormality (H76)


During standby and operation of cooling and heating, indoor-control panel error occur.

Malfunction Caused:


2. Faulty control panel.



Indoor-Control Panel Communication Abnormality (H76)

Check the DC voltage from the indoor unit PCB (main):- Plug out connector from the indoor unit PCB (main)- Turn ON the power- Measure the DC voltage pin1 & 4 of CN-REMOTE

- Defect in remote controller (control panel)- Replace the remote controller (control panel)

Yes


Is the remote controller (control panel) voltage 5Vdc

(pin1 & 4) generated?

Yes

Check the CN-REMOTE connector connection:- Turn OFF the power - Check the connector connection


NoIs the CN-REMOTE connector connection

normal?


No

Check the control panel cable connection.

- Defect in cable connection- Replace control panel cable

NoIs the control panel cable connection normal?

Yes


Indoor/Outdoor Abnormal Communication (H90)


During operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal.

Malfunction Caused:



3. Indoor-outdoor signal transmission error due to wrong wiring.

4. Indoor-outdoor signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units.

5. Indoor-outdoor signal transmission error due to disturbed power supply waveform.


Continue for 1 minute after operation.


Indoor/Outdoor Abnormal Communication (H90)


Check the indoor-outdoor units connection wires.

Correct the indoor-outdoor units connection wires.

YesIs there any wiring error?

Turn OFF the power and disconnect terminal 3 wire. Turn ON the power and measure Vdc between terminal

2 & 3 from the outdoor unit.

Is the Vdc fluctuate between 45-60Vdc?

Turn OFF the power and reconnect terminal 3 wire. Turn ON the power and again measure Vdc between

terminal 2 & 3 from the outdoor unit.

Is the Vdc fluctuate between 15-60Vdc?

Replace the outdoor unit PCB (main).

No

No

Yes

Replace the indoor unit PCB (main).

No

Tank Booster Heater OLP Abnormality (H91)



During operation of tank booster heater, and tank booster heater OLP open circuit.

Malfunction Caused:


2. Faulty tank booster heater overload protector (OLP).






Tank Booster Heater OLP Abnormality (H91)

Check tank booster heater OLP continuity:- Turn OFF power supply- Reset tank booster heater OLP- Measure the continuity of OLP

Is there any continuity? Multimeter to measure continuity

Use a test pen to push this button to reset OLP

- Defect in tank booster heater OLP- Replace tank booster heater OLP

Yes

Check the CN-OLP2 connector connection:- Turn OFF the power - Check the connector connection


Is the CN-OLP1 connector connection normal?


No

No

Is the abnormality happened during operation of tank booster heater?


No

Yes

Yes


Unspecified Voltage between Indoor and Outdoor (H95)


The supply power is detected for its requirement by the indoor/outdoor transmission.

Malfunction Caused:

1. Insufficient power supply.

2. Faulty outdoor unit PCB (noise filter/main).


Unspecified Voltage between Indoor and Outdoor (H95)


Check the supply voltage

Correct the power supply.

NoSupply voltage as specified?

Yes


Check the AC voltage from outdoor unit PCB (noise filter):- Turn OFF the power- Plug out connector AC-BLK, CN-BLK & CN-WHT from the outdoor unit PCB (noise filter)- Turn ON the power- Measure the AC voltage between AC-BLK & CN-WHT

Is the measured AC voltage 230V?

Check the AC voltage supply to outdoor unit PCB (main):- Turn OFF the power- Reconnect connector AC-BLK, CN-BLK & CN-WHT to the outdoor unit PCB (noise filter)- Turn ON the power- Measure the AC voltage between AC-BLK & CN-WHT

Is the measured AC voltage 230V?

- Defect in outdoor unit PCB (noise filter)- Replace the outdoor unit PCB (noise filter)

No

NoIs the measured voltage between DCP & DCN ~325Vdc?

Check the rectification voltage between DCP & DCN.

Check the DC filter (capacitor) PCB connector connection.

Is the DC filter (capacitor) PCB connector connection normal?


No

YesYes

No

Yes



Yes


Outdoor High Pressure Protection (H98)


During operation of heating, when pressure 4.0MPa and above is detected by outdoor high pressure sensor.

Malfunction Caused:


2. Insufficient water flow rate in system.


4. 2/3 way closed.


6. Excessive refrigerant.

7. Faulty outdoor high pressure sensor.




Is the water pump working?


Readjust the water pump speed.

NoIs the water pump speed

adjusted according to system hydraulic external static

pressure?

Replace the faulty water pump.

No

Outdoor High Pressure Protection (H98)

Yes

Check the system water flow rate.

Is there any water leakage?Fix the system water

leakage.

Yes

No

- Replace the outdoor unit PCB (main)- Replace the outdoor high pressure sensor

Check refrigerant amount.

Is the additional refrigerant amount filled correctly?

Reclaim and recharge with correct amount of

refrigerant.

No

Yes

Yes



formed)?


Yes

No

Is the 2/3 way valve closed?

Open the 2/3 way valve.

Check the 2/3 way valve.

No

Yes



Indoor Freeze-up Protection (H99)


During anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature < 0oC.

Malfunction Caused:




4. 2 way valve partially closed.



7. Faulty indoor refrigerant liquid temperature sensor.




Indoor Freeze-up Protection (H99)




Readjust the water pump speed.

NoIs the water pump speed

adjusted according to system hydraulic external static

pressure?

Replace the faulty water pump.

No

Yes


Is there any water leakage?Fix the system water

leakage.

Yes

Yes



Reclaim and recharge with correct amount of refrigerant.

No

Yes



formed)?


Yes

No

Is the 2 way valve partially closed?

Open the 2 way valve.

Check the 2 way valve.

Check the indoor refrigerant liquid temperature sensor.

Replace the indoor unit PCB (main).

Does it conform to the sensor characteristic chart?

Replace the indoor refrigerant liquid temperature sensor.

Yes

No

No

No

Yes


Outdoor High Pressure Switch Activate (F12)


During operation of cooling and heating, when pressure 4.5MPa and above is detected by outdoor high pressure switch.

Malfunction Caused:

1. Dust accumulation on the outdoor unit heat exchanger.





6. 2/3 way valve closed.



9. Faulty outdoor high pressure sensor and switch.

10. Faulty outdoor unit PCB.

Abnormality Judgment:Continue 4 times in 20 minutes.


Troubleshooting:




- Readjust the water pump speed- Replace outdoor high pressure sensor

No

Is the water pump speed adjusted according to system

hydraulic external static pressure?

- Replace the faulty water pump- Replace outdoor high pressure sensor

No

Yes

Yes


Is there any water leakage?

- Fix the system water leakage- Replace outdoor high pressure sensor

Yes

No

- Replace the outdoor unit PCB (main)- Replace the outdoor high pressure sensor and switch




- Reclaim and recharge with correct amount of refrigerant- Replace outdoor high pressure sensor

No

YesYes



formed)?

- Replace the expansion valve and/or strainer- Reclaim and recharge refrigerant- Replace outdoor high pressure sensor

Yes

No

Outdoor High Pressure Switch Activate (F12)





Is there any short circuit?

Clean the heat exchanger. Is the 2/3 way valve closed?



Yes

No

No

No

Yes


Compressor Rotation Failure (F14)


A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit.

Malfunction Caused:

1. Compressor terminal disconnect.


3. Faulty compressor.




Compressor Rotation Failure (F14)


Is the blinking of the 6 LEDs in same sequence/condition?

Yes

Disconnect the harnesses U, V, and W from the compressor terminal.

From the disconnected harnesses U, Y, and W, connect them to the inverter checker. Turn ON the power and operate the system. Check

the inverter checker 6 LEDs blinking condition.

- IPM defective- Replace the outdoor unit PCB (main)

No

Replace the compressor.

Check the U, V, and W connector connection:- Turn OFF the power - Check the U, V, and W connector connection at outdoor unit PCB (main) and compressor terminal


Is the connector connection normal?

No

Yes

Outdoor unit PCB (main)

Compressor terminal

Inverter checker


Outdoor Fan Motor (DC Motor) Mechanism Locked (F15)


The rotation speed detected by the Hall IC of the fan motor during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm).

Malfunction Caused:

1. Operation stop due to short circuit inside the fan motor winding.

2. Operation stop due to breaking of wire inside the fan motor.

3. Operation stop due to breaking of fan motor lead wires.

4. Operation stop due to fan motor Hall IC malfunction.

5. Operation error due to faulty outdoor unit PCB.




Outdoor Fan Motor (DC Motor) Mechanism Locked (F15)


Turn OFF the power and disconnect the fan motor

connector. Turn ON the power.


Check the output of the fan motor from outdoor unit PCB (main).

Turn OFF the power and rotate the fan by hand.

Does the fan rotate smoothly?

Turn ON the power and operate the fan motor.

Does it rotate?

Replace the fan motor.No

Yes

No Is the fan motor power supply voltage ~325Vdc (pin1 & 4) generated?

Is the fan motor control voltage 15Vdc (pin5 & 4) generated?


Check the rotation feedback output from the fan motor.

Operate the fan motor, is the rotation command voltage 1-5Vdc

(pin7 & 4) generated?

No

No

Yes

Stop the fan motor.


No

Replace the fan motor.Yes

Yes

Rotate the fan motor by hand, is the rotation feedback voltage 15Vdc

(pin6 & 4) generated? Replace the fan motor.


No

Yes

Yes


Input Over Current Detection (F16)


During operation of cooling and heating, when outdoor current above 27.9A is detected by the current transformer (CT) in the outdoor unit PCB.

Malfunction Caused:







Is the measured AC current over 27.9A?

Yes

Get restarted and measure the AC current from the outdoor LIVE terminal.


No


Excess refrigerant?Reclaim and recharge with

correct amount of refrigerant.


No

Yes

Input Over Current Detection (F16)


Compressor Overheating (F20)


During operation of cooling and heating, when temperature above 112oC is detected by the compressor tank temperature sensor.

Malfunction Caused:

1. Faulty compressor tank temperature sensor.









Compressor Overheating (F20)



No

Check the compressor tank temperature sensor.

Replace the compressor tank temperature sensor.

NoDoes it conform to the sensor characteristic chart?

Yes

Yes

No

Open the 2/3 way valve.Yes







formed)?

- Replace expansion valve and/or strainer- Reclaim and recharge refrigerant

Yes

No

Reclaim and recharge for a specified amount of fresh

refrigerant.

- Replace the outdoor unit PCB (main)- Replace the compressor

Yes

No


Procedure complete


IPM Overheating (F22)


During operation of cooling and heating, when temperature 95oC is detected by the outdoor IPM temperature sensor.

Malfunction Caused:






IPM Overheating (F22)


Is the outdoor unit fan motor operating?

Yes

Check the outdoor unit installation condition.

- Reinstall the outdoor unit- Remove the obstacle(s)

YesIs there any improper heat radiation?

No

Replace the outdoor unit fan motor.

No

- Defect in IPM- Replace the outdoor unit PCB (main)


Output Over Current Detection (F23)


During operation of cooling and heating, when outdoor DC current is above 40.1 ± 5.0A (for: UD07~09CE) OR 44.7 ± 5.0A (for: UD12~16CE) is detected by the IPM DC Peak sensing circuitry in the outdoor unit PCB (main).

Malfunction Caused:




Continue for 7 times.


Output Over Current Detection (F23)


Yes

No

Check the compressor winding resistance:- Turn OFF the power and disconnect the harnesses U, V, and W- Measure the winding resistance between U-V, V-W, and W-U

Are the compressor’s winding resistance (U-V, V-

W, or U-W) shorted?

- Compressor defective due to winding shorted- Replace the compressor

- Outdoor electronic circuit defect due to power transistor shorted- Replace the outdoor unit PCB (main)


Refrigeration Cycle Abnormality (F24)


1. During operation of cooling and heating, compressor frequency > Frated.

2. During operation of cooling and heating, running current: 0.65A < I < 1.65A.

3. During operation of cooling, water inlet temperature - indoor refrigerant liquid temperature < 5oC.

4. During operation of heating, indoor refrigerant liquid temperature - water inlet temperature < 5 oC.

Malfunction Caused:

1. Faulty water inlet or indoor refrigerant liquid temperature sensors.





6. Poor compression of compressor.




Refrigeration Cycle Abnormality (F24)



No

Check the water inlet and indoor ref. liquid temperature sensors.

Replace the water inlet or indoor ref. liquid temperature sensor.


Yes

Yes

No

Open the 2/3 way valve.Yes





formed)?

- Replace expansion valve and/or strainer- Reclaim and recharge refrigerant

Yes

NoReclaim and recharge for a specified amount of fresh

refrigerant.

- Replace the outdoor unit PCB (main)- Replace the compressor

Yes

No


Procedure complete




Four Way Valve Abnormality (F25)


1. During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0 oC.

2. During cooling operation, when the indoor pipe temperature of thermostat ON indoor unit > 45 oC.

Malfunction Caused:

1. Faulty sensor.


3. Faulty outdoor unit PCB (noise filter/main).

4. Faulty four way valve.




Is F25 occur during heating operation?

Is the four way valve coil energize during cooling operation?

No

Check the indoor pipe temperature sensor.

Replace the indoor pipe temperature sensor.


Yes

Four way valve coil disconnected (loose)?

Reconnect the harness.

Yes

Is the harness out of the CN-HOT connector?

No

Replace the outdoor unit PCB (noise filter/main).

Yes


Correct the four way valve coil.

Yes

Check the continuity of the four way valve coil.

Replace the four way valve coil.

NoDisconnect the harness from the CN-HOT connector. Resistance between harness about 1.52k

ohm?

No

Measure AC voltage supply to CN-HOT (pin1 & 3) during heating

operation.

Is the voltage supply to four way valve 230Vac?

Replace the outdoor unit PCB (noise filter/main).

Replace the four way valve.

Replace the four way valve.No

YesYes

No

Yes

Four Way Valve Abnormality (F25)


Outdoor High Pressure Switch Abnormal (F27)


During compressor stop, and outdoor high pressure switch is remain opened.

Malfunction Caused:


2. Faulty switch.



Continue for 1 minute.


Check the continuity of the outdoor high pressure switch:- Plug out outdoor high pressure switch connector from CN-PSW1 channel- Measure the connector continuity

Yes


Yes

Check the CN-PSW1 connector connection:- Turn OFF the power - Check the connector connection


NoIs the CN-PSW1 connector

connection normal?

No


- Defect in outdoor high pressure switch- Replace the outdoor high pressure switch


Outdoor High Pressure Switch Abnormal (F27)

Multimeter(normally close)


Outdoor Air Temperature Sensor Abnormality (F36)


During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.





Outdoor Air Temperature Sensor Abnormality (F36)

Check the outdoor air temperature sensor:- Plug out connector from the outdoor unit PCB (main)- Measure the resistance of the outdoor air temperature sensor

- Defect in outdoor air temperature sensor- Replace the outdoor air temperature sensor

Yes


Is the measured resistance of the outdoor air temperature sensor


No





Yes


Indoor Water Inlet Temperature Sensor Abnormality (F37)


During startup and operation of cooling and heating, the temperatures detected by the indoor water inlet temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.





Indoor Water Inlet Temperature Sensor Abnormality (F37)

Check the indoor water inlet temperature sensor:- Plug out connector from the indoor unit PCB (main)- Measure the resistance of the indoor water inlet temperature sensor

- Defect in indoor water inlet temperature sensor- Replace the indoor water inlet temperature sensor

Yes


Is the measured resistance of the indoor water inlet temperature sensor


No





Yes


Outdoor Discharge Pipe Temperature Sensor Abnormality (F40)


During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.





Outdoor Discharge Pipe Temperature Sensor Abnormality (F40)

Check the outdoor discharge pipe temperature sensor:- Plug out connector from the outdoor unit PCB (main)- Measure the resistance of the outdoor discharge pipe temperature sensor

- Defect in outdoor discharge pipe temperature sensor- Replace the outdoor discharge pipe temperature sensor

Yes


Is the measured resistance of the outdoor discharge pipe temperature sensor matches the value specified

in its characteristic chart?

No

Check the CN-DIS connector connection:- Turn OFF the power - Check the connector connection


NoIs the CN-DIS connector connection normal?


Yes


Power Factor Correction (PFC) Abnormality (F41)


During operation of cooling and heating, when the PFC protection circuitry in the outdoor unit PCB (main) senses abnormal high DC voltage level.

Malfunction Caused:

1. Power supply surge.

2. Compressor windings not uniform.





Check the supply voltage.

Correct the power supply.NoSupply voltage as

specified?

Power Factor Correction (PFC) Abnormality (F41)

Operate the system. Verify PFC abnormality by measuring the DC

voltage between DCP-OUT and DCN-OUT of the outdoor unit PCB (main).

- Defect in PFC circuitry- Replace the outdoor unit PCB (main)

YesIs the DC voltage between DCP-OUT and DCN-OUT normal

(between 285-315Vdc)?

No

Yes

Check the compressor winding resistance:- Turn OFF the power supply and disconnect the harnesses U, V, and W- Measure the winding resistance between U-V, V-W, and W-U

Yes


Are the compressor’s winding resistance (U-V, V-W, U-W)

uniform?



No


Outdoor Pipe Temperature Sensor Abnormality (F42)


During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.





Outdoor Pipe Temperature Sensor Abnormality (F42)

Check the outdoor pipe temperature sensor:- Plug out connector from the outdoor unit PCB (main)- Measure the resistance of the outdoor pipe temperature sensor

- Defect in outdoor pipe temperature sensor- Replace the outdoor pipe temperature sensor

Yes


Is the measured resistance of the outdoor pipe temperature sensor matches the value specified in its

characteristic chart?

No





Yes


Outdoor Defrost Temperature Sensor Abnormality (F43)


During startup and operation of cooling and heating, the temperatures detected by the outdoor defrost temperature sensor are used to determine sensor errors.

Malfunction Caused:


2. Faulty sensor.





Check the outdoor defrost temperature sensor:- Plug out connector from the outdoor unit PCB (main)- Measure the resistance of the outdoor defrost temperature sensor

- Defect in outdoor defrost temperature sensor- Replace the outdoor defrost temperature sensor

Yes


Is the measured resistance of the outdoor defrost temperature sensor matches the value specified in its

characteristic chart?

No





Yes

Outdoor Defrost Temperature Sensor Abnormality (F43)


Indoor Water Outlet Temperature Sensor Abnormality (F45)


During startup and operation of cooling and heating, the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor error.

Malfunction Caused:


2. Faulty sensor.





Indoor Water Outlet Temperature Sensor Abnormality (F45)

Check the indoor water outlet temperature sensor:- Plug out connector from the indoor unit PCB (main)- Measure the resistance of the indoor water outlet temperature sensor

- Defect in indoor water outlet temperature sensor- Replace the indoor water outlet temperature sensor

Yes


Is the measured resistance of the indoor water outlet temperature

sensor matches the value specified in its characteristic chart?

No





Yes


Outdoor Current Transformer Open Circuit (F46)


A current transformer (CT) open circuit is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (< 0.65A) for continuously 20 seconds.

Malfunction Caused:

1. CT defective.


3. Compressor defective (low compression).




Outdoor Current Transformer Open Circuit (F46)



Is the current < 0.65A?

Operate heating operation. When F46 occurs again, turn

OFF the power.





No

Yes

While the system is still in heating operation, check the

discharge pressure.

Turn ON the power, and operate heating operation.

No

Yes



Yes

No

Measure the current from the outdoor LIVE terminal.

- Defect in CT- Replace the outdoor unit PCB (main)

Is the pressure unchanged (same as when compressor stop)?

While the system is still in heating operation, further check (by touching) if:- Compressor discharge pipe is cold- Compressor body is warmto confirm the compressor low compression.


No

Yes

Yes


Cooling High Pressure Overload Protection (F95)


During operation of cooling, when pressure 4.0MPa and above is detected by outdoor high pressure sensor.

Malfunction Caused:

1. Dust accumulation in the outdoor unit heat exchanger.


3. 2 way valve closed.




7. Faulty outdoor high pressure sensor.



Troubleshooting:

Cooling High Pressure Overload Protection (F95)

- Replace the outdoor unit PCB (main)- Replace the outdoor high pressure sensor




Reclaim and recharge with correct amount of

refrigerant.

No

Yes



formed)?


Yes

No





Yes

Is there any short circuit?

No

Clean the heat exchanger.Yes

No

Is the 2 way valve closed? Open the 2 way valve.

Check the 2 way valve.

Yes

Is the outdoor unit fan motor operate normally?

Check the outdoor unit fan motor operation.

Replace the outdoor unit fan motor and/or outdoor

unit PCB (main).Yes

No

No

Thank You

Air-to-Water Heatpump Product Training SDC & SDF Series 22nd – 23rd July 2010.

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Transcript of Air-to-Water Heatpump Product Training SDC & SDF Series 22nd – 23rd July 2010.