Gree GWC12NC-K3NNA3F User manual

GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Change for Life
Service Manual
Models: GWC12NC-K3NNA3F
GWH12NC-K3NNA2G
GWC12NC-K3NNA4F
GWH12NC-K3NNA4H
GWC12NC-K3NNA5F
GWH12NC-K3NNA5G
GWC12NC-K3NNA9F
GWH12NC-K3NNA9G
GWC12NC-K3NNB4F
GWH12NC-K3NNB4G
GWC12NC-K3NND4E
(Refrigerant:R410A)

Service Manual
Table of Contents
Part Ⅰ: Technical Information......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................3
2.1 Specication Sheet...........................................................................................................3
2.2 Capacity Curve in Different Outdoor Temperature ...........................................................9
2.3 Cooling and Heating Data Sheet in Rated Frequency .....................................................9
3. Outline Dimension Diagram......................................................................10
3.1 Indoor Unit......................................................................................................................10
3.2 Outdoor Unit ...................................................................................................................10
4. Refrigerant System Diagram....................................................................11
5. Electrical Part.........................................................................................................13
5.1 Wiring Diagram...............................................................................................................13
5.2 PCB Printed Diagram .....................................................................................................16
6. Function and Control......................................................................................17
6.1 Remote Controller Introduction .....................................................................................17
6.2 Brief Description of Modes and Functions......................................................................21
Part Ⅱ: Installation and Maintenance .................................................26
7. Notes for Installation and Maintenance..........................................26
8. Installation................................................................................................................28
8.1 Installation Dimension Diagram......................................................................................28
8.2 Installation Parts-Checking ............................................................................................30
8.3 Selection of Installation Location....................................................................................30
8.4 Electric Connection Requirement...................................................................................30
8.5 Installation of Indoor Unit................................................................................................30
8.6 Installation of Outdoor Unit.............................................................................................33
8.7 Vacuum Pumping and Leak Detection ...........................................................................34
8.8 Check after Installation and Test Operation ...................................................................34
9. Maintenance............................................................................................................35
9.1 Error Code......................................................................................................................35
9.2 Procedure of Troubleshooting ........................................................................................36
9.3 Maintenance Method for Normal Malfunction.................................................................40
Table of Contents

Service Manual
10. Exploded View and Parts List ..............................................................42
10.1 Indoor Unit....................................................................................................................42
10.2 Outdoor Unit .................................................................................................................50
11. Removal Procedure.......................................................................................56
11.1 Removal Procedure of Indoor Unit ...............................................................................56
11.2 Removal Procedure of Outdoor Unit ............................................................................61
Appendix:........................................................................................................................65
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................65
Appendix 2: Conguration of Connection Pipe.....................................................................65
Appendix 3: Pipe Expanding Method ...................................................................................66
Appendix 4: List of Resistance for Temperature Sensor ......................................................67
Table of Contents

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit:
GWC12NC-K3NNA3F/I
GWH12NC-K3NNA2G/I
GWC12NC-K3NNA4F/I
GWH12NC-K3NNA4H/I
GWC12NC-K3NNA5F/I
GWH12NC-K3NNA5G/I
CoolHeatPower
Dry
GWC12NC-K3NNA9F/I
GWH12NC-K3NNA9G/I

2Technical Information
Service Manual
Outdoor Unit:
GWC12NC-K3NNA3E/O
GWC12NC-K3NNA3F/O
GWH12NC-K3NNA2G/O
YB1FA(MOTO)
X-FAN
I
I
I
Remote ControlIer:
GWC12NC-K3NND4E/I
GWC12NC-K3NNB4F/I
GWH12NC-K3NNB4G/I
Unit model Unit code Indoor unit
model
Indoor unit
code
Outdoor unit
model
Outdoor unit
code
Remove
Controller
GWH12NC-K3NNA2G CA181015200 GWH12NC-K3NNA2G/I CA181N15200 GWH12NC-K3NNA2G/O CA181W15200
YB1FA(MOTO)
GWC12NC-K3NNA3F CA171029800 GWC12NC-K3NNA3F/I CA171N29800 GWC12NC-K3NNA3F/O CA171W29800
GWC12NC-K3NNA4F CA161013300 GWC12NC-K3NNA4F/I CA161N13300
GWH12NC-K3NNA4H CA161013400 GWH12NC-K3NNA4H/I CA161N13400 GWH12NC-K3NNA2G/O CA181W15200
GWC12NC-K3NNA5F CA162018000 GWC12NC-K3NNA5F/I CA162N18000 GWC12NC-K3NNA3F/O CA171W29800
GWH12NC-K3NNA5G CA162018100 GWH12NC-K3NNA5G/I CA162N18100 GWH12NC-K3NNA2G/O CA181W15200
GWC12NC-K3NNA9F CA182006200 GWC12NC-K3NNA9F/I CA182N06200 GWC12NC-K3NNA3F/O CA171W29800
GWH12NC-K3NNA9G CA182006300 GWH12NC-K3NNA9G/I CA182N06300 GWH12NC-K3NNA2G/O CA181W15200
GWC12NC-K3NNB4F CA163013300 GWC12NC-K3NNB4F/I CA163N13300 GWC12NC-K3NNA3F/O CA171W29800
GWH12NC-K3NNB4G CA163013200 GWH12NC-K3NNB4G/I CA163N13200 GWH12NC-K3NNA2G/O CA181W15200
GWC12NC-K3NND4E CA145006400 GWC12NC-K3NND4E/I CA145N06400 GWC12NC-K3NNA3E/O CA171W24100

3
Technical Information
Service Manual
2. Specications
2.1 Specication Sheet
Model
GWC12NC-K3NNA3F
GWC12NC-K3NNA4F
GWC12NC-K3NNA5F
GWH12NC-K3NNA2G
GWH12NC-K3NNA4H
GWH12NC-K3NNA5G
Product Code
CA171029800
CA161013300
CA162018000
CA181015200
CA161013400
CA162018100
Power Supply
Rated Voltage V~ 220 220
Rated Frequency Hz 50 50
Phases 1 1
Power Supply Mode Indoor Indoor
Cooling Capacity W 3223 3223
Heating Capacity W / 3250
Cooling Power Input W 1001 1001
Heating Power Input W / 867
Cooling Power Current A 4.64 4.64
Heating Power Current A / 4.02
Rated Input W 1500 1500
Rated Current A 8.0 8.0
Air Flow Volume(SH/H/M/L/SL) m3/h 650/550/450/330/- 650/550/450/330/-
Dehumidifying Volume L/h 1.4 1.2
EER W/W 3.22 3.22
COP W/W / 4
SEER W/W / /
HSPF W/W / /
Application Area m215-22 15-22
Indoor Unit
Model of indoor unit
GWC12NC-K3NNA3F/I
GWC12NC-K3NNA4F/I
GWC12NC-K3NNA5F/I
GWH12NC-K3NNA2G/I
GWH12NC-K3NNA4H/I
GWH12NC-K3NNA5G/I
Fan Type Cross-ow Cross-ow
Diameter Length(DXL) mm Φ92X645 Φ92X645
Fan Motor Cooling Speed(SH/H/M/L/SL) r/min 1350/1250/1100/950/- 1350/1250/1100/950/-
Fan Motor Heating Speed(SH/H/M/L/SL) r/min / 1350/1250/1100/1000/-
Output of Fan Motor W 20 20
Fan Motor RLA A 0.22 0.2
Fan Motor Capacitor μF 1 1
Input of Heater W / /
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter mm Φ7 Φ7
Row-n Gap mm 2-1.4 2-1.4
Coil Length (LXDXW) mm 645X25.4X266.7 645X25.4X266.7
Swing Motor Model MP24AA MP24AA
Output of Swing Motor W 1.5 1.5
Fuse A 3.15 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 41/38/34/29/- 41/38/34/29/-
Sound Power Level (SH/H/M/L/SL) dB (A) 51/48/44/39/- 51/48/44/39/-
Dimension (WXHXD) mm 845X275X180 845X275X180
Dimension of Carton Box (LXWXH) mm 915X255X355 915X255X355
Dimension of Package(LXWXH) mm 918X258X370 918X258X370
Net Weight kg 9.5 9.5
Gross Weight kg 11.5 11.5

4Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit GWC12NC-K3NNA3F/O GWH12NC-K3NNA2G/O
Product Code CA171W29800 CA181W15200
Compressor Manufacturer/Trademark ZHUHAI LANDA
COMPRESSOR CO., LTD
ZHUHAI LANDA
COMPRESSOR CO., LTD
Compressor Model QXA-B117C050 QXA-B117C050
Compressor Oil RB68EP RB68EP
Compressor Type Rotary Rotary
L.R.A. A 21 21
Compressor RLA A 4 4
Compressor Power Input W 800 800
Overload Protector HPA-322 HPA-322
Throttling Method Throttle Throttle
Operation Temp OC 16~30 16~30
Ambient Temp (Cooling) OC 18~43 18~43
Ambient Temp (Heating) OC / -7~24
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter mm Φ5 Φ7.94
Rows-n Gap mm 1-1.3 1-1.4
Coil Length (LXDXW) mm 710X11.4X495 697X19.05X506
Fan Motor Speed rpm 850 850
Output of Fan Motor W 35 35
Fan Motor RLA A 0.33 0.22
Fan Motor Capacitor μF 2.5 2.5
Air Flow Volume of Outdoor Unit m3/h 1600 1600
Fan Type Axial-ow Axial-ow
Fan Diameter mm Φ394.5 Φ394.5
Defrosting Method / Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IP24 IP24
Permissible Excessive Operating Pressure for the
Discharge Side MPa 4.0 4.0
Permissible Excessive Operating Pressure for the
Suction Side MPa 2.5 2.5
Sound Pressure Level (H/M/L) dB (A) 50/-/- 51/-/-
Sound Power Level (H/M/L) dB (A) 60/-/- 61/-/-
Dimension (WXHXD) mm 776X540X320 776X540X320
Dimension of Carton Box (LXWXH) mm 820X355X580 820X355X580
Dimension of Package(LXWXH) mm 823X358X595 823X358X595
Net Weight kg 27 29
Gross Weight kg 29.5 31.5
Refrigerant R410A R410A
Refrigerant Charge kg 0.55 0.8
Connection
Pipe
Length m 5 5
Gas Additional Charge g/m 15 15
Outer Diameter Liquid Pipe mm Φ6 Φ6
Outer Diameter Gas Pipe mm Φ12 Φ12
Max Distance Height m 10 10
Max Distance Length m 20 20
Note: The connection pipe applies metric diameter.

5
Technical Information
Service Manual
Model GWC12NC-K3NNA9F
GWC12NC-K3NNB4F
GWH12NC-K3NNA9G
GWH12NC-K3NNB4G
Product Code CA182006200
CA163013300
CA182006300
CA163013200
Power Supply
Rated Voltage V~ 220 220
Rated Frequency Hz 50 50
Phases 1 1
Power Supply Mode Indoor Indoor
Cooling Capacity W 3223 3223
Heating Capacity W / 3250
Cooling Power Input W 1001 1001
Heating Power Input W / 867
Cooling Power Current A 4.64 4.64
Heating Power Current A / 4.02
Rated Input W 1500 1500
Rated Current A 8.0 8.0
Air Flow Volume(SH/H/M/L/SL) m3/h 650/550/450/330/- 650/550/450/330/-
Dehumidifying Volume L/h 1.4 1.2
EER W/W 3.22 3.22
COP W/W / 4
SEER W/W / /
HSPF W/W / /
Application Area m215-22 15-22
Indoor Unit
Model of indoor unit GWC12NC-K3NNA9F/I
GWC12NC-K3NNB4F/I
GWH12NC-K3NNA9G/I
GWH12NC-K3NNB4G/I
Fan Type Cross-ow Cross-ow
Diameter Length(DXL) mm Φ92X645 Φ92X645
Fan Motor Cooling Speed(SH/H/M/L/SL) r/min 1350/1250/1100/950/- 1350/1250/1100/950/-
Fan Motor Heating Speed(SH/H/M/L/SL) r/min / 1350/1250/1100/1000/-
Output of Fan Motor W 20 20
Fan Motor RLA A 0.22 0.2
Fan Motor Capacitor μF 1 1
Input of Heater W / /
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter mm Φ7 Φ7
Row-n Gap mm 2-1.4 2-1.4
Coil Length (LXDXW) mm 645X25.4X266.7 645X25.4X266.7
Swing Motor Model MP24AA MP24AA
Output of Swing Motor W 1.5 1.5
Fuse A 3.15 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 41/38/34/29/- 41/38/34/29/-
Sound Power Level (SH/H/M/L/SL) dB (A) 51/48/44/39/- 51/48/44/39/-
Dimension (WXHXD) mm 845X275X180 845X275X180
Dimension of Carton Box (LXWXH) mm 915X255X355 915X255X355
Dimension of Package(LXWXH) mm 918X258X370 918X258X370
Net Weight kg 9.5 9.5
Gross Weight kg 11.5 11.5

6Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit GWC12NC-K3NNA3F/O GWH12NC-K3NNA2G/O
Product Code CA171W29800 CA181W15200
Compressor Manufacturer/Trademark ZHUHAI LANDA
COMPRESSOR CO., LTD
ZHUHAI LANDA
COMPRESSOR CO., LTD
Compressor Model QXA-B117C050 QXA-B117C050
Compressor Oil RB68EP RB68EP
Compressor Type Rotary Rotary
L.R.A. A 21 21
Compressor RLA A 4 4
Compressor Power Input W 800 800
Overload Protector HPA-322 HPA-322
Throttling Method Throttle Throttle
Operation Temp OC 16~30 16~30
Ambient Temp (Cooling) OC 18~43 18~43
Ambient Temp (Heating) OC / -7~24
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter mm Φ5 Φ7.94
Rows-n Gap mm 1-1.3 1-1.4
Coil Length (LXDXW) mm 710X11.4X495 697X19.05X506
Fan Motor Speed rpm 850 850
Output of Fan Motor W 35 35
Fan Motor RLA A 0.33 0.22
Fan Motor Capacitor μF 2.5 2.5
Air Flow Volume of Outdoor Unit m3/h 1600 1600
Fan Type Axial-ow Axial-ow
Fan Diameter mm Φ394.5 Φ394.5
Defrosting Method / Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IP24 IP24
Permissible Excessive Operating Pressure for the
Discharge Side MPa 4.0 4.0
Permissible Excessive Operating Pressure for the
Suction Side MPa 2.5 2.5
Sound Pressure Level (H/M/L) dB (A) 50/-/- 51/-/-
Sound Power Level (H/M/L) dB (A) 60/-/- 61/-/-
Dimension (WXHXD) mm 776X540X320 776X540X320
Dimension of Carton Box (LXWXH) mm 820X355X580 820X355X580
Dimension of Package(LXWXH) mm 823X358X595 823X358X595
Net Weight kg 27 29
Gross Weight kg 29.5 31.5
Refrigerant R410A R410A
Refrigerant Charge kg 0.55 0.8
Connection
Pipe
Length m 5 5
Gas Additional Charge g/m 15 15
Outer Diameter Liquid Pipe mm Φ6 Φ6
Outer Diameter Gas Pipe mm Φ12 Φ12
Max Distance Height m 10 10
Max Distance Length m 20 20
Note: The connection pipe applies metric diameter.

7
Technical Information
Service Manual
Model GWC12NC-K3NND4E
Product Code CA145006400
Power Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Indoor
Cooling Capacity W 3224
Heating Capacity W /
Cooling Power Input W 1147
Heating Power Input W /
Cooling Power Current A 5.32
Heating Power Current A /
Rated Input W 1400
Rated Current A 7.72
Air Flow Volume(SH/H/M/L/SL) m3/h 600/550/500/450/-
Dehumidifying Volume L/h 1.2
EER W/W 2.81
COP W/W /
SEER W/W /
HSPF W/W /
Application Area m215-22
Indoor Unit
Model of indoor unit GWC12NC-K3NND4E/I
Fan Type Cross-ow
Diameter Length(DXL) mm Φ92X645
Fan Motor Cooling Speed(SH/H/M/L/SL) r/min 1350/1250/1100/950/-
Fan Motor Heating Speed(SH/H/M/L/SL) r/min /
Output of Fan Motor W 20
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 1
Input of Heater W /
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Row-n Gap mm 2-1.4
Coil Length (LXDXW) mm 645X25.4X266.7
Swing Motor Model MP24AA
Output of Swing Motor W 1.5
Fuse A 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 42/39/36/33/-
Sound Power Level (SH/H/M/L/SL) dB (A) 52/49/46/43/-
Dimension (WXHXD) mm 845X275X180
Dimension of Carton Box (LXWXH) mm 915X255X355
Dimension of Package(LXWXH) mm 918X258X370
Net Weight kg 10
Gross Weight kg 12

8Technical Information
Service Manual
Outdoor Unit
Model of Outdoor Unit GWC12NC-K3NNA3E/O
Product Code CA171W24100
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD.
Compressor Model QXA-B120C150
Compressor Oil POE(ZE-GLES RB 68EP)
Compressor Type Rotary
L.R.A. A 22.00
Compressor RLA A 4.70
Compressor Power Input W 1020
Overload Protector Internal
Throttling Method Capillary
Operation Temp OC 16~30
Ambient Temp (Cooling) OC 18~43
Ambient Temp (Heating) OC /
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ5
Rows-n Gap mm 1-1.4
Coil Length (LXDXW) mm 720.5X11.4X495.3
Fan Motor Speed rpm 850
Output of Fan Motor W 35
Fan Motor RLA A 0.37
Fan Motor Capacitor μF 2.5
Air Flow Volume of Outdoor Unit m3/h 1600
Fan Type Axial-ow
Fan Diameter mm Φ394.5
Defrosting Method /
Climate Type T1
Isolation I
Moisture Protection IP24
Permissible Excessive Operating Pressure for the
Discharge Side MPa 4.3
Permissible Excessive Operating Pressure for the
Suction Side MPa 2.5
Sound Pressure Level (H/M/L) dB (A) 52/-/-
Sound Power Level (H/M/L) dB (A) 62/-/-
Dimension (WXHXD) mm 776X540X320
Dimension of Carton Box (LXWXH) mm 820X355X580
Dimension of Package(LXWXH) mm 823X358X595
Net Weight kg 27
Gross Weight kg 31
Refrigerant R410A
Refrigerant Charge kg 0.57
Connection
Pipe
Length m 5
Gas Additional Charge g/m 15
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ12
Max Distance Height m 10
Max Distance Length m 20
Note: The connection pipe applies metric diameter.
The above data is subject to change without notice; please refer to the nameplate of the unit.

9
Technical Information
Service Manual
2.2 Capacity Curve in Different Outdoor Temperature
Cooling Heating
2.3 Cooling and Heating Data Sheet in Rated Frequency
Rated cooling
condition(°C) (DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe temperature
of heat exchanger Fan speed of
indoor unit
Fan speed of
outdoor unit
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/24 12K 0.9~1.1 in:8~11
out:11~14
in:75~85
out:37~43 Super High High
Rated heating
condition(°C) (DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe temperature
of heat exchanger Fan speed of
indoor unit
Fan speed of
outdoor unit
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
20/- 7/6 12K 2.2~2.5 in:75~85
out:37~43
in:1~3
out:2~5 Super High High
Instruction:
T1: Inlet and outlet pipe temperature of evaporator
T2: Inlet and outlet pipe temperature of condenser
P: Pressure at the side of big valve
Connection pipe length: 5 m.
Cooling:
Heating:
40
50
60
70
80
90
100
110
32 33 34 35 36 37 38 39 40 41 42 43 44 45
Outdoor temp.(°C) Outdoor temp.(°C)
Capacity ratio(%)
Condition Cooling
Indoor:DB27°C WB19°C
Indoor air flow: Super High
Pipe length:5m
15
7
-7 224
0
20
40
60
80
100
120
-10-5 0510
Capacity ratio(%)
Condition Heating
Indoor:DB20°C
Indoor air flow: Super High
Pipe length:5m

10 Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
3.2 Outdoor Unit
Unit: mm
Unit: mm
845
130 542 173
80143
4343
Φ55
180
275
Φ55
712
776
510
320
257
682
045

11
Technical Information
Service Manual
4. Refrigerant System Diagram
Cooling only model
Indoor unit Outdoor unit
Accumlator
COOLING
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Compressor
StrainerThrottle Valve
Indoor unit Outdoor unit
Accumlator
COOLING
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Compressor
Strainer
Capillary
GWC12NC-K3NNA3F/O GWH12NC-K3NNA2G/O GWC12NC-K3NNA3F/O GWH12NC-K3NNA2G/O
GWC12NC-K3NNA3E/O

12 Technical Information
Service Manual
Cooling and heating model
Indoor unit Outdoor unit
COOLING
HEATING
Accumlator
4-Way valve
Discharge
Suction
Heat
exchanger
(evaporator) Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Compressor
StrainerStrainer Throttle Valve
Connection pipe specication:
Liquid pipe:1/4" (6mm)
Gas pipe:1/2" (12mm)

13
Technical Information
Service Manual
5. Electrical Part
5.1 Wiring Diagram
● Indoor Unit
●Instruction
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN Green CAP Jumper cap
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
N
L
OUTDOOR UNIT
III
Models: GWC12NC-K3NNA3F/I GWC12NC-K3NNA4F/I GWC12NC-K3NNA5F/I
GWC12NC-K3NNA9F/I GWC12NC-K3NND4E/I

14 Technical Information
Service Manual
Models: GWH12NC-K3NNA2G/I GWH12NC-K3NNA4H/I GWH12NC-K3NNA5G/I
GWH12NC-K3NNA9G/I GWH12NC-K3NNB4G/I
III
2
4
5
N
L
● Outdoor Unit
Model: GWC12NC-K3NNA3E/O

15
Technical Information
Service Manual
Model: GWH12NC-K3NNA2G/O
BLOCK
TERMINAL
CAP.
C1
XT1
BLOCK
TERMINAL
VT
VALVE
4-WAY
4YV
COMP.
MOTOR
FAN
MYEGN
BU(BK)
BN
RD
OG
INDOOR UNIT
BU
BU
OG
VT
BK
BU
YEGN
BK
YE BU
YEGN
2
PE
N(1)
C2
PE
XT2
PE
PE
R(M) PE
CAP.
4
5
C
S
VT
COMP
Motor ground
only applies
to the iron
shell motor.
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
BLOCK
TERMINAL C2
XT
N(1)
2
PE
COMP.FAN
YEGN
PE
PE
M
MOTOR
Motor ground
only applies
to the iron
shell motor.
COMP YEGN
PE
R(M) PE
C
BK
S
RD
BN
C1 BU
YE
BU
BK
BU
BK
YEGN
INDOOR UNIT
BU(BK)
Model: GWC12NC-K3NNA3F/O

16 Technical Information
Service Manual
1
2
3
4
5
67 89 10 11 12
13
14
1516
1Fuse
2Live wire
3 Compressor
4Live wire for healthy function
5 Neutral wire for healthy function
6 Control interface for PG motor
7 Neutral wire
84-way valve
9Outdoor fan
10 Auto button
11 Up&down swing
12 Feedback interface for PG motor
13 Jumper cap
14 Display interface
15 Tube temperature sensor
16 Ambient temperaturesensor
5.2 PCB Printed Diagram
Top view
Bottom view

17
Technical Information
Service Manual
6. Function and Control
6.1 Remote Controller Introduction
Buttons on Remote Controller
Introduction for Icons on Display Screen
Introduction for Buttons on Remote Controller
Auto mode
Cool mode
Heat mode
Fan mode
Dry mode
Clock
Light
Child lock
TIMER ON/TIMER OFF
Up&down swing
:Indoor ambient temp.
:Set temp.
:Outdoor ambient temp.
Sleep mode
Set temperature
Send signal
Turbo mode
Set time
X-fan mode
Set fan speed
ON/OFF Button
2
3
1
5
6
4
8
9
7
11
12
10
MODE Button
+/- Button
FAN Button
TIMER ON/TIMER-OFF Button
X-FAN Button
TEMP Button
LIGHT Button
SLEEP Button
CLOCK Button
TURBO Button
Button
2
6
8
3
9
10
7
5
12 11
4
1
Operation mode
Temp. display type
1. ON/OFF Button
Press this button can turn on or turn off the air conditioner. After turning on the air conditioner, operation indicator " " on indoor
unit’s display is ON (green indicator. The colour is different for different models), and indoor unit will give out a sound.
2. MODE Button
Press this button to select your required operation mode.
Note:After putting through the power, the air conditioner will give out a sound. Operation indictor " " is ON (red indicator). After that,
you can operate the air conditioner by using remote controller.
AUTO COOL DRY FAN HEAT
Operation mode
Temp. display type