Chigo Inverters Manual

7/22/2019 Chigo Inverters Manual

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DC Inverter Split Air-Condition Unit

SERVICE MANUAL


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Table of Contents

1. The model and the air conditioning unit parameters...........................................................1

2. Units operating working conditions and temperature range ............................................8

3. Units characteristic..................................................................................................................11

4. Indoor and outdoor units size ...............................................................................................26

5. Indoor and outdoor unit explosion diagram and spare parts list .....................................30

6. The analysis of indoor malfunction code ............................................................................35

7. The analysis of the complete units malfunction code.........................................................50


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1The model and the air conditioning unit parameters1.1 the model.


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1.2. The air conditioners parameter.


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2 RATING CONDITIONS and Operating Limits

2.1 RATING CONDITIONS

Standard conditions in accordance with ISO 5151, and EN 14511.

Cooling:

Indoor: 27 DB 19 WB

Outdoor:35DB 24 WB

Heating:

Indoor: 20 DB 15 WB

Outdoor: 7 DB 6 WB

2.2 Operat ing Limits

Outdoor

Upper limit (DB) 46Cooling

Lower limit (DB) 5

Upper limit (DB) 24Heating

Lower limit (DB) -15

Voltage 1PH 220-240V


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3 Units characteristic R410a

Low noise level

Wide operating range with outdoor air temperatures, cooling:5-46,heating:-15-24

High efficiency and energy saving Air filters easy to remove and clean

Twin rotary compressor

Auto-restart after a power supply blackout

Single-phase power supply thanks to DC inverter technology low consumption

Dynamic refrigerant control by DC inverter compressor and circuit, electronic valve and fuzzy logic

managed by a powerful micro program

EEV for each indoor unit


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The compressors energy consumption graph .

COP (W/W)/2ND

The compressors condensing pressure graph .


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Indoor Units Data

Indoor Units Capacity For 2.0KW

Capacity Model

2.0KW CMV-V20G3A-M75/81/84/85/87/88/95/96

Cooling Capacity (KW)---Run Model (Unit A,B,C or D),220-240V,Indoor fan at high speed

INDOOR ENTERING AIR DB/WB TEMPERATURE [0C]

OUTDOOR

ENTERING AIR DB

TEMPERATURE

[0C] DATA 22/15 24/17 27/19 29/21 32/23

TC 80 - 110 % of nominal

SC 80 - 105 % of nominal

-10 - 20

(protection range) PI 25 - 50 % of nominal

TC 1.94 2.06 2.18 2.32 2.44

SC 1.72 1.75 1.79 1.82 1.8525

PI 0.49 0.50 0.51 0.51 0.53

TC 1.84 1.96 2.10 2.22 2.34

SC 1.67 1.70 1.75 1.79 1.8230

PI 0.55 0.55 0.56 0.57 0.58

TC 1.74 1.88 2.00 2.12 2.26

SC 1.63 1.67 1.70 1.73 1.7735

PI 0.60 0.61 0.62 0.63 0.64

TC 1.66 1.78 1.90 2.04 2.16

SC 1.58 1.62 1.65 1.70 1.7340PI 0.66 0.67 0.68 0.69 0.69

TC 1.54 1.66 1.80 1.92 2.04

SC 1.53 1.56 1.60 1.63 1.6846

PI 0.73 0.74 0.74 0.76 0.76

Heating Capacity (KW)---Run Model (Unit A,B,C or D),220-240V,Indoor fan at high speed

ID COIL ENTERING AIR DB TEMPERATURE [0C]

OD COIL

ENTERING

AIR DB/WB

TEM PERATU RE

[0C]

DATA 15 20 25

-15/-16 TC 1.54 1.42 1.32

PI 0.40 0.44 0.48

-10/-12 TC 1.70 1.58 1.49

PI 0.48 0.52 0.57

-7/-8 TC 1.82 1.73 1.61

PI 0.55 0.59 0.63

-1/-2 TC 1.90 1.80 1.68

PI 0.58 0.62 0.66

2/1 TC 1.94 1.82 1.73


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PI 0.60 0.64 0.68

7/6 TC 2.50 2.40 2.30

PI 0.63 0.67 0.71

10/9 TC 2.64 2.54 2.42

PI 0.67 0.71 0.75

15/12 TC 2.78 2.69 2.57

PI 0.70 0.74 0.78

1524 TC 85 - 105 % of nominal(Protection Range) PI 80 - 120 % of nominal

Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

Cooling Capacity Correction Factor

0

0.2

0.4

0.6

0.8

1

1.2

1.4

25 30 35 40 45

Outdoor Temperature (deg C)

Capacity

Ratio

32/23

29/27

27/19

24/17

22/15

Heating Capacity Ratio Vs. Outdoor Temperature

Heating Capacity Correction Factor

0

0.2

0.4

0.6

0.8

11.2

1.4

-15 -10 -5 0 5 10 15 20


Capacity

Ratio

15

20

25


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Capacity Model

2.5KW CMV-V25G3A-M75/81/84/85/87/88/95/96

Capacity (KW)---Run Model (Unit A,B,C or D),220-240V,Indoor fan at high speed


OUTDOOR

ENTERING AIR DB

TEMPERATURE

[0C] DATA 22/15 24/17 27/19 29/21 32/23


-10 - 20 SC 80 - 105 % of nominal


TC 2.42 2.57 2.73 2.89 3.05

25 SC 1.72 1.75 1.79 1.82 1.86

PI 0.58 0.59 0.60 0.61 0.62TC 2.30 2.46 2.62 2.77 2.93

30 SC 1.67 1.71 1.74 1.78 1.81

PI 0.65 0.66 0.67 0.68 0.69

TC 2.18 2.34 2.50 2.66 2.82

35 SC 1.63 1.66 1.70 1.74 1.77

PI 0.71 0.72 0.74 0.75 0.76

TC 2.07 2.23 2.38 2.54 2.70

40 SC 1.59 1.62 1.66 1.69 1.73

PI 0.78 0.79 0.80 0.81 0.82

TC 1.93 2.09 2.24 2.40 2.56

46 SC 1.53 1.57 1.60 1.64 1.67

PI 0.86 0.87 0.88 0.89 0.91



OD COIL

ENTERING

AIR DB/WB

TEM PERATU RE

[0C]

DATA 15 20 25

-15/-16 TC 1.92 1.77 1.65

PI 0.49 0.54 0.59

-10/-12 TC 2.13 1.98 1.86

PI 0.59 0.64 0.70

-7/-8 TC 2.28 2.16 2.01

PI 0.67 0.72 0.77

-1/-2 TC 2.37 2.25 2.10

PI 0.71 0.75 0.80

2/1 TC 2.43 2.28 2.16

PI 0.73 0.78 0.83


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7/6 TC 3.12 3.00 2.88

PI 0.77 0.82 0.87

10/9 TC 3.30 3.18 3.03

PI 0.82 0.87 0.92

15/12TC

3.48 3.36 3.21PI 0.86 0.90 0.96

15-24 TC 85 - 105 % of nominal

(Protection Range) PI 80 - 120 % of nominal

L E G E N D

TC Total Cooling Capacity, kW

SC Sensible Capacity, Kw

PI Power Input, kW

WB Wet Bulb Temp., (

o

C)DB Dry Bulb Temp., (oC)

ID Indoor

OD Outdoor




0

0.2

0.4

0.6

0.8

1

1.2

1.4

25 30 35 40 45Outdoor Temperature (deg C)

Capacity

Ratio

32/23

29/27

27/19

24/17

22/15


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0

0.2

0.4

0.6

0.8

1

1.2

1.4

-15 -10 -5 0 5 10 15 20


Capacity

Ratio

15

20

25



Capacity Model

CMV-V35G3A-M75/81/84/85/87/88/95/963.5KW

CMV-V35G3A-P84/94/98



OUTDOOR

ENTERING AIR DB

TEMPERATURE

[0C] DATA 22/15 24/17 27/19 29/21 32/23


-10 - 20 SC 80 - 105 % of nominal


TC 3.40 3.61 3.82 4.06 4.2725 SC 3.03 3.09 3.15 3.21 3.27

PI 0.86 0.87 0.89 0.90 0.93TC 3.22 3.43 3.68 3.89 4.10

30 SC 2.94 3.00 3.09 3.15 3.21PI 0.96 0.97 0.99 1.00 1.02

TC 3.05 3.29 3.50 3.71 3.96

35 SC 2.88 2.94 3.00 3.06 3.12

PI 1.06 1.08 1.09 1.11 1.12

TC 2.91 3.12 3.33 3.57 3.78

40 SC 2.79 2.85 2.91 3.00 3.06

PI 1.16 1.18 1.19 1.21 1.22

TC 2.70 2.91 3.15 3.36 3.5746 SC 2.70 2.76 2.82 2.88 2.97

PI 1.28 1.30 1.31 1.33 1.34


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OD COIL

ENTERING

AIR DB/WB

TEM PERATU RE

[0C]

DATA 15 20 25

-15/-16 TC 2.56 2.36 2.20

PI 0.67 0.73 0.80

-10/-12 TC 2.84 2.64 2.48

PI 0.80 0.87 0.94

-7/-8 TC 3.04 2.88 2.68

PI 0.91 0.98 1.04

-1/-2 TC 3.16 3.00 2.80

PI 0.95 1.02 1.09

2/1 TC 3.24 3.04 2.88

PI 0.99 1.05 1.12

7/6 TC 4.16 4.00 3.84

PI 1.04 1.11 1.18

10/9 TC 4.40 4.24 4.04

PI 1.11 1.18 1.24

15/12 TC 4.64 4.48 4.28

PI 1.17 1.23 1.301524 TC 85 - 105 % of nominal





0

0.2

0.4

0.6

0.8

1

1.21.4

25 30 35 40 45


Capacity

Ratio

32/23

29/27

27/19

24/17

22/15


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0

0.2

0.4

0.6

0.8

1

1.2

1.4

-15 -10 -5 0 5 10 15 20Outdoor Temperature (deg C)

Capacity

Ratio

15

20

25


Capacity Model

5.0KW CMV-V50G3A-P75/81/84/85/87/88/95/96



OUTDOOR

ENTERING AIR DB

TEMPERATURE

[0C] DATA 22/15 24/17 27/19 29/21 32/23


-10 - 20 SC 80 - 105 % of nominal


TC 4.85 5.15 5.45 5.80 6.1025 SC 4.55 4.64 4.73 4.82 4.91

PI 1.23 1.25 1.28 1.29 1.33TC 4.60 4.90 5.25 5.55 5.85

30 SC 4.41 4.50 4.64 4.73 4.82PI 1.37 1.39 1.42 1.44 1.47

TC 4.35 4.70 5.00 5.30 5.65

35 SC 4.32 4.41 4.50 4.59 4.68

PI 1.51 1.54 1.56 1.59 1.61

TC 4.15 4.45 4.75 5.10 5.40

40 SC 4.19 4.28 4.37 4.50 4.59

PI 1.65 1.68 1.70 1.73 1.75TC 3.85 4.15 4.50 4.80 5.10

46 SC 4.05 4.14 4.23 4.32 4.46PI 1.83 1.86 1.87 1.90 1.92


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OD COIL

ENTERING

AIR DB/WB

TEM PERATU RE

[0C]

DATA 15 20 25

-15/-16 TC 3.71 3.42 3.19

PI 0.97 1.06 1.16

-10/-12 TC 4.12 3.83 3.60

PI 1.16 1.26 1.37

-7/-8 TC 4.41 4.18 3.89

PI 1.32 1.42 1.51-1/-2 TC 4.58 4.35 4.06

PI 1.38 1.48 1.58

2/1 TC 4.70 4.41 4.18

PI 1.43 1.53 1.63

7/6 TC 6.03 5.80 5.57

PI 1.51 1.61 1.71

10/9 TC 6.38 6.15 5.86

PI 1.61 1.71 1.80

15/12 TC 6.73 6.50 6.21

PI 1.69 1.79 1.88

15-24 TC 85 - 105 % of nominal



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0

0.2

0.4

0.6

0.8

1

1.2

1.4

25 30 35 40 45


Capacity

Ratio

32/23

29/27

27/19

24/17

22/15



0

0.2

0.4

0.6

0.8

1

1.2

1.4

-15 -10 -5 0 5 10 15 20


Capacity

Rat

io

15

20

25


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Capacity Correction Factor Due to Tubing Length (One Way)

Cooling

Heating


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Pressure Curve

Model

CMV-V40H13AD CMV-50V3A-E2 CMV-V71T3AT CMV-V80T3AQ

Cooling--------------Test Model

Heating-----------Test Model


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ELECT RICAL D ATA

Model CMV-V40H13AD

Power Supply 220-240V 1PH 50Hz

Connected to OutdoorMaximum Current 8 A

Inrush Current 15A

Starting Current 1A

Circuit breaker 20A

Power supply wiring - No. x cross section 31.5 mm26680mm

Interconnecting cable - No. x cross section 41.0 mm26300mm

Model CMV-50V3A-E2


Connected to Outdoor

Maximum Current 11 A

Inrush Current 35A

Starting Current 1A

Circuit breaker 20A



Model CMV-V52E23AT



Maximum Current 11A

Inrush Current 35A

Starting Current 1A

Circuit breaker 20A


Interconnecting cable - No. x cross section41.0 mm26300mm

Model CMV- V71T3AT



Maximum Current 16A

Inrush Current 35A

Starting Current 2A

Circuit breaker 20A

Power supply wiring - No. x cross section 32.5 mm2

6480mmInterconnecting cable - No. x cross section 41.0 mm

26200mm


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Model CMV-V80T3AQ



Maximum Current 16A

Inrush Current 35A

Starting Current 2A

Circuit breaker 20A



Note:

Inrush current is the current when power is up. (charging the DC capacitors at outdoor unit

controller).

Starting current is the current when starting the compressor


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4. OUTLINE DIMENSI ON OF OUTDOOR AND INDOOR

4.1 Outline dimension of outdoor Units

CMV-V40H13AD

CMV-50V3A-E2/ CMV-V52E23AT


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CMV- V71T3AT/ CMV-V80T3AQ

4 2 the outdoor unit mounting dimensions


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the bodys dimension mounting dimensionsDimensions

Code

outdoor

units typeA B C D E

CMV-V40H13AD 845 304 542 510 278

CMV-50V3A-E2 900 352 590 505 310

CMV-V52E23AT 900 352 590 505 310

CMV-V71T3AT/

CMV-V80T3AQ900 388 837 600 358

4 3 The indoor unit mounting dimensions

unitmm


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the bodys dimension mounting dimensionsDimensions

Code

indoor

units type

A B C D E F

CMV-V20G3A/MXX 800 280 195 490 / /

CMV-V25G3A/MXX 800 280 195 490 / /

CMV-V35G3A/MXX 800 280 195 490 / /

CMV-V35G3A/PXX 900 296 220 583 257.5 257.5

CMV-V50G3A/PXX 900 296 220 583 257.5 257.5


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5 The outdoor unit structure exploded view .5.1 outdoor unit :CMV-V40H13AD

NO. description name number

1 Front Grill 1

2 Front Plate 1

3 Axial flow fan 1

4 Motor 1

5 Motor support 16 Condenser 1

7 Top panel 1

8 Electric box 1

9 Rear Grill 1

10 Right panel 1

11 handle 1

12 Valve installation plate 1

13 A DN4 DN4 valve 1

14 A DN8 DN8 valve 1

15 B DN4 DN4 valve 1

16 B DN8 DN8 valve 1

17 Capillary Assy 1

18 Electronic expansion valve 2

19 Four-way valve assembly 1

20 Steam liquid segregator 1

21 Compressor 1

22 Partition board 1

23 Base 1


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5.2 outdoor un it : CMV-50V3A-E2/ CMV-V52E23AT


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1 front grill 1

2 front panel 1

3 fan 14 motor 1

5 motor bracket assemble 1

6 left grill 1

7 left pole 1

8 top cover 1

9 rear grill 1

10 condenser 1

11 4-way valve 1

12 muffle 113 filter 1

14 controllor 1

15 control box cover 1

16 electrical control box 1

17 A DN8 DN8 valve for A unit 1

18 A DN4 DN4 valve for A unit 1

19 B DN8 DN8 valve for B unit 1

20 B DN4 DN4 valve for B unit 1

21 valve installation plate 122 handle 1

23 right panel 1

24 expand valve 2

25 compressor 1

26 compressor pad 1

27 partition board 1

28 base assemble 1


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5.3outdoor unit : CMV-V71T3AT/ CMV-V80T3AQ


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1 top panel 1

2 electric box 1

3 rear Grill 1

4 partition board 15 four-way valve 1

6 electronic expansion valve 1

7 desiccation filter 1

8 right panel 1

9 large handle 1

10 valve installation plate 1

11 oil separator 1

12 high-pressure tank 1

13 compressor 114 base 1

15 condenser 1

16 motor support 1

17 DC motor 1

18 axial flow fan 1

19 front Grill 1

20 front Plate 1

21 left protect net 1

22 left panel 123 vapor-liquid separator 1

24 back panel 2

25 DN10 DN10 cut-off valve 1

26 DN8 DN8 cut-off valve 1

27 electronic control box support plate 1

28 small hand-pumped 1

29 front maintenance board 1


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6The analysis of indoor malfunction code internal wiring get loose, whichwill cause malfunction.

indoor detailed malfunction1.when indoor unit live wire is disconnected its lamp panel cant display.

Live wire is off

2.when the transformers secondary and primary disconnect or indoor fuse is off the indoor unit lamppanel cant display.

Transformer secondary is off

Transformer primary is off

The relevant transfomer primarysocket


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Indoor unit fuse is off.

The indoor unit fuse

The condition that the lamp panel

cant display

3.1when the indoor null line is off the system displays F1 code 2when indoor communication wire is off the system also displays F1 code

The inserted slice to null line

The indoor unit null line is off


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2the indoor communication wire isoff.

Communication wire socket.

the indoor lamp panel displays F1 code.

4. when indoor fan mainline or feedback wire is offthe indoor lamp panel displays F4 code. After directlyinsert it wellTo restart the unit to recover normal .

Indoor fan mainline is off

The relevant socket with indoor fan mainline


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indoor fan feedback wire is off

the relevant socket with indoor feedback

wire

The lamp panel displays F4 code.

5.when indoor sensor has the problem, the lamp will display F2 F3 code. When indoor coil outlet , inletand middle temperature sensor appear malfunction, the lamp panel displays F3 code; when indoor

temperature sensor appears fault, the lamp panel shows F2 fault code.

Indoor temperature sensor plug

the relevant socket of indoor temperature

sensor plug


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The lamp panel alternately displays F2,F3fault code.

6.when outdoor temperature sensor is off or loose contact the indoor lamp panel displays F6 faultcode.

the relevant socket of outdoor temp.

sensor.

The outdoor temperature sensor isoff or loose contact.


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The indoor lamp panel displays F6fault code.

7.when the system appears mode conflict the indoor lamp panel shows d1 code.

the indoor lamp panel showsd1code.

8.when the system is in the defrosting conditionThe lamp panel displays dF code.

The lamp panel displays dF code.


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The outdoor electrical control fault code of the America 12K model .1.the outdoor module temperature sensor is off or loose contact the lamp panel shows F6 code.

the outdoor module temperature sensor

is off or loose contact .

the relevant socket with the outdoormodule temperature sensor plug .

The lamp panel shows F6 code .

2.The outdoor unit DC busbar voltage is abnormal the lamp panel shows F7code.

The PN power wire are off .


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The lamp panel shows F7code.

3.the outdoor module drive wire is off the lamp panel shows FC code .

The outdoor module drive wire is off .

The matching socket with the outdoormodule drive wire

The matching socket with the outdoormodule drive wire .

The outdoor module drive wire isoff .


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The lamp panel shows FC code .

4the wave filtering board and mainboard power wire is off or loose contactthe lamp panel shoes F1 code .the wave filtering board and mainboard powerwire is off or loose contact

The matching socket with the wavefiltering board and mainboard power wire

the lamp panel shoes F1 code .


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5. the evaporator middle temperature and condenser middle temperature sensor is off the lamp paneldisplays P8 code .

the evaporator middle temperature andcondenser middle temperature sensor is off

the lamp panel displays P8 code


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The 67th

style indoor lamp panel

The timing lamp The turbo lamp The running lamp

The indoor unit faulty display:

Faulty contents Trouble display

Communication faultThe running lamp lightens all the timethe turbo lamp

lightens 2 times and then extinguish 2 seconds

Indoor fan faultThe running lamp lightens all the timethe turbo lamp

lightens 5 timesand then extinguish 2 seconds

Indoor temp. sensor faultThe running lamp lightens all the timethe turbo lamp


Indoor coil outlet temp. sensor faultThe running lamp lightens all the timethe turbo lamp

lightens 4 timesand then extinguish 2 seconds

Indoor coil inlet temp. sensor fault The running lamp lightens all the timethe turbo lamplightens 4 times and then extinguish 2 seconds

Indoor coil middle temp. sensor faultThe running lamp lightens all the timethe turbo lamp


Mode conflictThe running lamp lightens 1 time and then extinguish

1 second

Defrosting or anti cold airThe timing lamp lightens 1 time and then extinguish

1 second

The outdoor unit faulty display:


the outdoor unit transducer module

protection faulty

The timing lamp lightens all the timethe turbo lamp


over current of outdoor unit The timing lamp lightens all the timethe turbo lamplightens 3 times and then extinguish 2 seconds

discharge temp. of compressor too high,

outside ambient temp. too high, switch

temp. of compressor crust cut off, temp.

of module too high



The outdoor unit DC busbar voltage is

abnormal



lack refrigerant or reverse valve faultThe timing lamp lightens all the timethe turbo lamp


outdoor sensor faultThe running lamp lightens all the timethe turbo lamp


outdoor unit drive fault, start compressor

failure

The running lamp lightens all the timethe turbo lamp



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The 85th

style indoor lamp panel

The timing lamp The sleeping lamp The running lamp


Communication faultThe timing lamp lightens all the timethe sleeping lamp


Indoor fan faultThe timing lamp lightens all the timethe sleeping lamp


Indoor temp. sensor faultThe timing lamp lightens all the timethe sleeping lamp


Indoor coil outlet temp. sensor faultThe timing lamp lightens all the timethe sleeping lamp


Indoor coil inlet temp. sensor faultThe timing lamp lightens all the timethe sleeping lamp


Indoor coil middle temp. sensor faultThe timing lamp lightens all the timethe sleeping lamp


Mode conflictThe timing lamp lightens 1 time and then extinguish

1 second

Defrosting or anti cold airThe running lamp lightens 1 time and then extinguish

1 second


the outdoor unit transducer module

protection faulty

The running lamp lightens all the timethe sleeping lamp


over current of outdoor unitThe running lamp lightens all the timethe sleeping lamp


discharge temp. of compressor too high,

outside ambient temp. too high, switch

temp. of compressor crust cut off, temp.

of module too high



The outdoor unit DC busbar voltage is

abnormal



lack refrigerant or reverse valve faultThe running lamp lightens all the timethe sleeping lamp


outdoor sensor faultThe timing lamp lightens all the timethe sleeping lamp


outdoor unit drive fault, start compressor

failure

The timing lamp lightens all the timethe sleeping lamp



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6.3 The malfunction of indoor and outdoor unit

1The common malfunction code analysis and solutions!The faultcode

The fault content The reason of fault and its solutions

F1 The communication fault

1The communication wire is broken off. Please checkwhether the wire is disentwined;2Please check whether the electrical control board isdamaged. It should be replaced when it is damaged;

3Please check whether the power ground wire is reliable;

4Please check whether the unit is abnormal caused by theexternal interference. If it is, then find the interferingsources, and remove them.

F2The indoor temperature

sensor fault

1Check whether the resistance of sensor is normal,otherwise replace it;

2Check whether the sensor wire is short circuit or opencircuit, and whether the plug is well contacted, whetherthere is welding off or rosin joint on the electric controlboard, repair it if there is any above;

3When the 1 and 2 are both normal, then the componentor integrated circuit is damaged, the electric control board

should be replaced.

F3The indoor coil

temperature sensor fault

1Check whether the resistance of sensor is normal,

otherwise replace it;

2Check whether the sensor wire is short circuit or opencircuit, and whether the plug is well contacted, whetherthere is welding off or rosin joint on the electric controlboard ,repair it if there is any above;

3When the 1 and 2 are both normal, then the componentor integrated circuit is damaged, the electric control board

should be replaced.

F4

Indoor PG motor fault(tap motor hasnt so

breakdown )

1Check whether the contact of the plug of the motor wire

and socket is well. Please make sure it is well contacted;

2Check whether the indoor motor has damaged, the

motor should be replaced when it is damaged;

3Check whether the controllable silicon and other

components on the electric control board have damaged

replace the controllable silicon or electric control boardwhen they are damaged;

4Check whether the indoor fan is unobstructed whenrunning, please fix the indoor fan again when it isobstructed.

F5 IPM protection

1Check whether the supply voltage is out of ranging from150 to 270V(overvoltage and undervoltage protection);Measuring the actual current, if the current is greater thanthe rated current of 2A,it is over-temperature protection;If the above are normal, that is IPM module internal circuit

fault protection, so please replace the IPM module.

F6 The outdoor sensor fault


2Check whether the sensor wire is short circuit or opencircuit, and whether the plug is well contacted, whetherthere is welding off or rosin joint on the electric control

board, repair it if there is any above;

3When the 1 and 2 are both normal ,then the componentor integrated circuit is damaged, the electric control boardshould be replaced.


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F7

The outdoor coiltemperature sensor fault

Including the

mid-point of tube

inspiratory gas


2Check whether the sensor wire is short circuit or opencircuit, and whether the plug is well contacted, whether

there is welding off or rosin joint on the electric controlboard, repair it if there is any above;

3When the 1 and 2 are both normal, then the componentor integrated circuit is damaged, the electric control boardshould be replaced.

F9 Exhaust gas sensor failure


2Check whether the sensor wire is short circuit or open

circuit, and whether the plug is well contacted, whetherthere is welding off or rosin joint on the electric controlboard, repair it if there is any above;

3When the 1 and 2 are both normal, then the componentor integrated circuit is damaged, the electric control boardshould be replaced.

FAThe communication faultbetween the wire

controller and the indoorPCB

1 check whether the wire controllers connecting wire isshort circuit or loose, please make it connect well;

2 Check the connecting linewire controllerPCBwhether they are loose or have a bad contact. Please

make them have a good contact.

FCoutdoor unit driving fault,

starting compressor

failure

1Turn on the power again, and then check whether theoperation of the compressor is normal;

2Check whether the connection of the compressor iscorrect or reliable, otherwise repair it;

3Check whether the components on the electric control

board have been damaged, if they are damaged, thecomponents or the electric control board should be

replaced.;4Check whether the connecting wires are disentwinedbetween the Intelligent Power Module board and the main

board, otherwise make the wires connect firmly .

FF

The outdoor DC motorfault

1Check the resistance value of the DC motor port. If it isshort circuit, please change the DC motor;

2Check the voltage value of the DC motor port

VCC(15Vdc)Vdm(340Vdc),please change the PCB board

if the voltage values are abnormal;

3if all the voltage values of the DC motor port are

normalthe Vsp voltage0~5vis also ok ,it shows that the

inner PCB board of the DC motor is damaged, then changethe DC motor.

FH

The indoor unit

EEPROM error

1Check whether there are false weld and bad contact etcbetween the EEPROM chip block and the electroniccontrol board ;

2Check whether the EEPROM chip pin is broken foot

and the direction of installation is in line with the

EEPROM block;

3When the procedure of EEPROM chip and itself havefault it will appear the code FH. That is the need to replacethe EEPROM chip.

dF Defrosting state The unit is in defrosting statethat is normal.

dI Mode conflictWhen the running mode for No.1 indoor unit is differentfrom No.2 indoor unit, the dF is displayed.


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The faultcode

The fault content The reason of fault and solution

P1

Indoor coil

temperature

over-temperature

protection for heating

(thermal overload),

outdoor coil

temperature

overheating protection

for cooling (cooling

overload)

1Check whether the ambient temperature is over the rangeof air-conditioning running temperature ;

2Check whether the indoor coil temperature is higher thanor equal to 63 degrees when heating and check whetherthe outdoor coil temperature is higher than or equal to 65

degrees when cooling, it will appear protection if thevalue is over the above;

3Check whether the parameters of indoor and outdoor coiltemperature sensors are normal, if abnormal, pleasereplace the sensors;

4If the above are normal, check whether the main controlboard output parameters are normal, if abnormal, pleasereplace the main control board.

P2

The outdoor unit

inverter module

protection fault

1Check whether the connection of the compressor is reliable,

otherwise connect firmly again;

2Check whether the fixation between the IPM module and

the radiator is firm.;3Check whether the compressor is well, otherwise replace it;

4Check whether the IPM module is abnormal, otherwisereplace it.

P3Over current of

outdoor unit

1Check whether the ambient temperature exceeds theoperation range for the air conditioner;

2Check whether the current detection circuit is abnormal, theelectric control should be replaced when it is abnormal..

P4

discharge temperature of

compressor is too high, theoutside ambienttemperature

over-temperature, switchoff the compressor shelltemperature, moduletemperatureover-temperature

1Check whether the pressure is normal when the unit isrunning, if it is abnormal, you should detect the leakage andthen welding and adding refrigerant;

2Check whether the ambient temperature is too high or too

low, when the temperature is more than -20 degrees and less55 degrees, it can disappear automatically;

3Check whether temperature switch of compressor isdamage, it should be replaced if it is damaged.

P7

The outdoor unit DC

generatrix voltage is

abnormal

1Check whether the supply voltage is out of ranging from150 to 270V;

2Check the voltage detection circuit of the IPM base board isabnormal, if it is abnormal, the IPM base board or the electriccontrol board should be replaced.

P8lack refrigerant or reverse

valve fault

1Check whether the high and low pressure valves have beenopened, otherwise open the valves;

2Check whether the indoor coil pipe temperature sensor is

normal, if it is abnormal, the sensor should be replaced;3Check whether the indoor coil temperature sensor hung in

the airplease plug it in a correct position if the indoor coiltemperature sensor hung in the air;

4Check the system pressure is abnormal, if it is abnormal,yon should detect leakage and the welding and adding therefrigerant.;

5Please change the outdoor PCB board , if all above arenormal.

PA

protection when indoor

pipe temperature is toolow (Anti-icing)

1Check whether the ambient temperature is over the rangeof air-conditioning running temperature;

2Check the indoor coil temperature is less than or equal to-1 degrees, if more than this value it will be the protectionof;

3Check whether the indoor coil temperature sensor


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parameters are normal, if abnormal it is the replacementof the sensor;

4If the above are normal, check whether the main controlboard output parameters are normal, if abnormal ,pleasereplace the main control board.

PC

Outdoor ambienttemperature

over-temperatureprotection (including highand low)

1Check whether the outdoor ambient temperature is toohigh or too low, when the ambient temperature is lower

than (T> -20, T

Chigo Inverters Manual

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