Gree GWH18KG-K3DNB1G User manual

GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Change for Life
Service Manual
Models: GWH18KG-K3DNA5G
GWH18KG-K3DNA6G
GWH18KG-K3DNA9G
GWH18KG-K3DNB1G
GWH18KG-K3DNB2G
GWH18KG-K3DNB4G
GWH24KG-K3DNA5G
GWH24KG-K3DNA6G
GWH24KG-K3DNA9G
GWH24KG-K3DNB1G
GWH24KG-K3DNB2G
GWH24KG-K3DNB4G
(Refrigerant R410A)

Service Manual
Table of Contents
Table of Contents
Part Ⅰ: Technical Information.......................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................3
2.1 Specication Sheet...........................................................................................................3
2.2 Operation Characteristic Curve ......................................................................................11
2.3 Capacity Variation Ratio According to Temperature .......................................................11
2.4 Cooling and Heating Data Sheet in Rated Frequency ...................................................12
2.5 Noise Curve....................................................................................................................12
3. Outline Dimension Diagram......................................................................13
3.1 Indoor Unit......................................................................................................................13
3.2 Outdoor Unit ...................................................................................................................14
4. Refrigerant System Diagram....................................................................15
5. Electrical Part.........................................................................................................16
5.1 Wiring Diagram...............................................................................................................16
5.2 PCB Printed Diagram.....................................................................................................19
6. Function and Control......................................................................................21
6.1 Remote Controller Introduction .....................................................................................21
6.2 Brief Description of Modes and Functions......................................................................25
Part Ⅱ: Installation and Maintenance .................................................31
7. Notes for Installation and Maintenance..........................................31
8. Installation................................................................................................................33
8.1 Installation Dimension Diagram......................................................................................33
8.2 Installation Parts-checking ............................................................................................35
8.3 Selection of Installation Location....................................................................................35
8.4 Electric Connection Requirement...................................................................................35
8.5 Installation of Indoor Unit................................................................................................35
8.6 Installation of Outdoor Unit.............................................................................................38
8.7 Vacuum Pumping and Leak Detection ...........................................................................39
8.8 Check after Installation and Test Operation ...................................................................39

Service Manual
Table of Contents
9. Maintenance............................................................................................................40
9.1 Malfunction Display of Indoor Unit..................................................................................40
9.2 Procedure of Troubleshooting ........................................................................................42
9.3 Troubleshooting for Normal Malfunction.........................................................................59
10. Exploded View and Parts List..............................................................61
10.1 Indoor Unit....................................................................................................................61
10.2 Outdoor Unit .................................................................................................................71
11. Removal Procedure.......................................................................................75
11.1 Removal Procedure of Intdoor Unit ..............................................................................75
11.2 Removal Procedure of Outdoor Unit ............................................................................81
Appendix:........................................................................................................................93
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................93
Appendix 2: Conguration of Connection Pipe.....................................................................93
Appendix 3: Pipe Expanding Method ...................................................................................94
Appendix 4: List of Resistance for Temperature Sensor ......................................................95

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit
GWH18KG-K3DNA6G/I
GWH24KG-K3DNA6G/I
GWH18KG-K3DNA5G/I
GWH24KG-K3DNA5G/I
GWH18KG-K3DNB1G
GWH24KG-K3DNB1G
GWH18KG-K3DNB2G/I
GWH24KG-K3DNB2G/I
GWH18KG-K3DNB4G/I
GWH24KG-K3DNB4G/I
GWH18KG-K3DNA9G/I
GWH24KG-K3DNA9G/I
ON/OFF

2Technical Information
Service Manual
Outdoor Unit
GWH18KG-K3DNA6G/O
GWH24KG-K3DNA6G/O
Remote Controller
YB1F2(XFAN)
FAN
AUTO
OPER
HEALTH
AIR
FILTER
TURBO
ON/OFF
X-FAN
HOUR
HUMIDITY
ON/OFF
MODE
FAN
X-FAN
TURBO
TEMP
TIMER
SLEEP LIGHT

3
Technical Information
Service Manual
2. Specications
2.1 Specication Sheet
Parameter Unit Value
Model 1.GWH18KG-K3DNA6G
2.GWH18KG-K3DNA9G
Product Code 1.CB146036000
2.CB146037300
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Outdoor
Cooling Capacity(Min~Max) W 5275(1200~6200)
Heating Capacity(Min~Max) W 5570(1100~6000)
Cooling Power Input(Min~Max) W 1675(380~2450)
Heating Power Input(Min~Max) W 1750(350~2600)
Cooling Current Input A 7.43
Heating Current Input A 7.80
Rated Input W 2650
Rated Current A 11.80
Air Flow Volume(SH/H/M//L/SL) m3/h 800/680/560/460/-
Dehumidifying Volume L/h 1.8
EER W/W 3.15
COP W/W 3.18
SEER W/W 5.60
HSPF W/W /
Application Area m223-34
Indoor
Unit
Indoor Unit Model 1.GWH18KG-K3DNA6G/I
2.GWH18KG-K3DNA9G/I
Indoor Unit Product Code 1.CB146N36000
2.CB146N37300
Fan Type Cross-ow
Fan Diameter Length(DXL) mm Ф98X650
Cooling Speed(SH/H/M//L/SL) r/min 1350/1100/950/800/-
Heating Speed(SH/H/M//L/SL) r/min 1400/1200/1050/900/-
Fan Motor Power Output W 20
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 1.5
Evaporator Form Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Ф7
Evaporator Row-n Gap mm 2-1.4
Evaporator Coil Length (LXDXW) mm 657X25.4X304.8
Swing Motor Model MP28VB
Swing Motor Power Output W 2
Fuse Current A 3.15
Sound Pressure Level(SH/H/M//L/SL) dB (A) 49/44/40/35/-
Sound Power Level(SH/H/M//L/SL) dB (A) 60/55/51/46/-
Dimension (WXHXD) mm 867X305X215
Dimension of Carton Box (LXWXH) mm 945X380X295
Dimension of Package(LXWXH) mm 948X383X310
Net Weight kg 12
Gross Weight kg 15

4Technical Information
Service Manual
Outdoor
Unit
Outdoor Unit Model GWH18KG-K3DNA6G/O
Outdoor Unit Product Code CB146W36000
Compressor Manufacturer ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
Compressor LRA. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Compressor Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Set Temperature Range ºC 16~30
Cooling Operation Ambient Temperature
Range ºC -15~43
Heating Operation Ambient Temperature
Range ºC -15~24
Condenser Form Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Ф7
Condenser Rows-n Gap mm 2-1.4
Condenser Coil Length (LXDXW) mm 851X38.1X660
Fan Motor Speed rpm 750
Fan Motor Power Output W 60
Fan Motor RLA A /
Fan Motor Capacitor μF /
Outdoor Unit Air Flow Volume m3/h 3200
Fan Type Axial-ow
Fan Diameter mm Ф520
Defrosting Method Automatic Defrosting
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) 55/-/-
Sound Power Level (H/M/L) dB (A) 65/-/-
Dimension(WXHXD) mm 963X700X396
Dimension of Carton Box (LXWXH) mm 1026X455X735
Dimension of Package(LXWXH) mm 1029X458X750
Net Weight kg 46
Gross Weight kg 50.5
Refrigerant R410A
Refrigerant Charge kg 1.3
Connection
Pipe
Connection Pipe Length m 5
Connection Pipe Gas Additional Charge g/m 20
Outer Diameter Liquid Pipe mm Ф6
Outer Diameter Gas Pipe mm Ф12
Max Distance Height m 10
Max Distance Length m 25
Note: The connection pipe applies metric diameter.
The above data is subject to change without notice. Please refer to the nameplate of the unit.

5
Technical Information
Service Manual
Parameter Unit Value
Model 1.GWH18KG-K3DNA5G 2.GWH18KG-K3DNA6G 3.GWH18KG-K3DNB2G 4.GWH18KG-K3DNB1G
5.GWH18KG-K3DNA9G 6.GWH18KG-K3DNB4G
Product Code 1.CB146037401 2.CB146036001 3.CB409002501 4.CB146038101
5.CB146037301 6.CB146038301
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Outdoor
Cooling Capacity(Min~Max) W 5275(1200~6200)
Heating Capacity(Min~Max) W 5570(1100~6000)
Cooling Power Input(Min~Max) W 1675(380~2450)
Heating Power Input(Min~Max) W 1750(350~2600)
Cooling Current Input A 7.43
Heating Current Input A 7.80
Rated Input W 2650
Rated Current A 11.80
Air Flow Volume(SH/H/M//L/SL) m3/h 800/680/560/460/-
Dehumidifying Volume L/h 1.8
EER W/W 3.15
COP W/W 3.18
SEER W/W 5.60
HSPF W/W /
Application Area m223-34
Indoor
Unit
Indoor Unit Model 1.GWH18KG-K3DNA5G/I 2.GWH18KG-K3DNA6G/I 3.GWH18KG-K3DNB2G/I 4.GWH18KG-K3DNB1G/I
5.GWH18KG-K3DNA9G/I 6.GWH18KG-K3DNB4G/I
Indoor Unit Product Code 1.CB146N37400 2.CB146N36000 3.CB409N02500 4.CB146N38100
5.CB146N37301 6.CB146N38300
Fan Type Cross-ow
Fan Diameter Length(DXL) mm Ф98X650
Cooling Speed(SH/H/M//L/SL) r/min 1350/1100/950/800/-
Heating Speed(SH/H/M//L/SL) r/min 1400/1200/1050/900/-
Fan Motor Power Output W 20
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 1.5
Evaporator Form Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Ф7
Evaporator Row-n Gap mm 2-1.4
Evaporator Coil Length (LXDXW) mm 657X25.4X304.8
Swing Motor Model MP28VB
Swing Motor Power Output W 2
Fuse Current A 3.15
Sound Pressure Level(SH/H/M//L/SL) dB (A) 49/44/40/35/-
Sound Power Level(SH/H/M//L/SL) dB (A) 60/55/51/46/-
Dimension (WXHXD) mm 867X305X215
Dimension of Carton Box (LXWXH) mm 945X380X295
Dimension of Package(LXWXH) mm 948X383X310
Net Weight kg 12
Gross Weight kg 15

6Technical Information
Service Manual
Outdoor
Unit
Outdoor Unit Model GWH18KG-K3DNA6G/O
Outdoor Unit Product Code CB146W36001
Compressor Manufacturer ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
Compressor LRA. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Compressor Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Set Temperature Range ºC 16~30
Cooling Operation Ambient Temperature
Range ºC -15~43
Heating Operation Ambient Temperature
Range ºC -20~24
Condenser Form Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Ф7
Condenser Rows-n Gap mm 2-1.4
Condenser Coil Length (LXDXW) mm 851X38.1X660
Fan Motor Speed rpm 750
Fan Motor Power Output W 60
Fan Motor RLA A /
Fan Motor Capacitor μF /
Outdoor Unit Air Flow Volume m3/h 3200
Fan Type Axial-ow
Fan Diameter mm Ф520
Defrosting Method Automatic Defrosting
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) 55/-/-
Sound Power Level (H/M/L) dB (A) 65/-/-
Dimension(WXHXD) mm 963X700X396
Dimension of Carton Box (LXWXH) mm 1026X455X735
Dimension of Package(LXWXH) mm 1029X458X750
Net Weight kg 46
Gross Weight kg 50.5
Refrigerant R410A
Refrigerant Charge kg 1.3
Connection
Pipe
Connection Pipe Length m 5
Connection Pipe Gas Additional Charge g/m 20
Outer Diameter Liquid Pipe mm Ф6
Outer Diameter Gas Pipe mm Ф12
Max Distance Height m 10
Max Distance Length m 25
Note: The connection pipe applies metric diameter.
The above data is subject to change without notice. Please refer to the nameplate of the unit.

7
Technical Information
Service Manual
Parameter Unit Value
Model 1.GWH24KG-K3DNA6G
2.GWH24KG-K3DNA9G
Product Code 1.CB146035900
2.CB146037200
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Outdoor
Cooling Capacity(Min~Max) W 6450(2530~6550)
Heating Capacity(Min~Max) W 7000(2530~7600)
Cooling Power Input(Min~Max) W 2180(600~2650)
Heating Power Input(Min~Max) W 2220(600~2800)
Cooling Current Input A 9.7
Heating Current Input A 10.5
Rated Input W 2800
Rated Current A 12.5
Air Flow Volume(SH/H/M//L/SL) m3/h 1000/800/700/550/-
Dehumidifying Volume L/h 2.1
EER W/W 2.96
COP W/W 3.15
SEER W/W 5.60
HSPF W/W /
Application Area m223-34
Indoor
Unit
Indoor Unit Model 1.GWH24KG-K3DNA6G/I
2.GWH24KG-K3DNA9G/I
Indoor Unit Product Code 1.CB146N35900
2.CB146N37200
Fan Type Cross-ow
Fan Diameter Length(DXL) mm Φ98X765
Cooling Speed(SH/H/M//L/SL) r/min 1350/1150/1000/850/-
Heating Speed(SH/H/M//L/SL) r/min 1400/1200/1000/900/-
Fan Motor Power Output W 35
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 2.5
Evaporator Form Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Φ7
Evaporator Row-n Gap mm 2-1.5
Evaporator Coil Length (LXDXW) mm 765X25.4X342.9
Swing Motor Model MP35XX
Swing Motor Power Output W 2.5
Fuse Current A 3.15
Sound Pressure Level(SH/H/M//L/SL) dB (A) 51/47/42/39/-
Sound Power Level(SH/H/M//L/SL) dB (A) 61/57/52/49/-
Dimension (WXHXD) mm 1007X315X219
Dimension of Carton Box (LXWXH) mm 1073X395X313
Dimension of Package(LXWXH) mm 1076X398X328
Net Weight kg 14
Gross Weight kg 17

8Technical Information
Service Manual
Outdoor
Unit
Outdoor Unit Model GWH24KG-K3DNA6G/O
Outdoor Unit Product Code CB146W35900
Compressor Manufacturer ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
Compressor LRA. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Compressor Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Set Temperature Range ºC 16~30
Cooling Operation Ambient Temperature
Range ºC -15~43
Heating Operation Ambient Temperature
Range ºC -15~24
Condenser Form Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7
Condenser Rows-n Gap mm 2-1.4
Condenser Coil Length (LXDXW) mm 984X38.1X748
Fan Motor Speed rpm 800
Fan Motor Power Output W 90
Fan Motor RLA A /
Fan Motor Capacitor μF /
Outdoor Unit Air Flow Volume m3/h 4000
Fan Type Axial-ow
Fan Diameter mm Φ552
Defrosting Method Automatic Defrosting
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) 58/-/-
Sound Power Level (H/M/L) dB (A) 68/-/-
Dimension(WXHXD) mm 1000X790X427
Dimension of Carton Box (LXWXH) mm 1080X485X840
Dimension of Package(LXWXH) mm 1083X488X855
Net Weight kg 55.5
Gross Weight kg 60.5
Refrigerant R410A
Refrigerant Charge kg 1.80
Connection
Pipe
Connection Pipe Length m 5
Connection Pipe Gas Additional Charge g/m 50
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ16
Max Distance Height m 10
Max Distance Length m 25
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
Parameter Unit Value
Model 1.GWH24KG-K3DNA5G 2.GWH24KG-K3DNA6G 3.GWH24KG-K3DNB2G 4.GWH24KG-K3DNB1G
5.GWH24KG-K3DNA9G 6.GWH24KG-K3DNB4G
Product Code 1.CB146037701 2.CB146035901 3.CB409002601 4.CB146038201
5.CB146037201 6.CB146038701
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode Outdoor
Cooling Capacity(Min~Max) W 6450(2530~6550)
Heating Capacity(Min~Max) W 7000(2530~7600)
Cooling Power Input(Min~Max) W 2180(600~2650)
Heating Power Input(Min~Max) W 2220(600~2800)
Cooling Current Input A 9.7
Heating Current Input A 10.5
Rated Input W 2800
Rated Current A 12.5
Air Flow Volume(SH/H/M//L/SL) m3/h 1000/800/700/550/-
Dehumidifying Volume L/h 2.1
EER W/W 2.96
COP W/W 3.15
SEER W/W 5.60
HSPF W/W /
Application Area m223-34
Indoor
Unit
Indoor Unit Model 1.GWH24KG-K3DNA5G/I 2.GWH24KG-K3DNA6G/I 3.GWH24KG-K3DNB2G/I 4.GWH24KG-K3DNB1G/I
5.GWH24KG-K3DNA9G/I 6.GWH24KG-K3DNB4G/I
Indoor Unit Product Code 1.CB146N37700 2.CB146N35900 3.CB409N02600 4.CB146N38200
5.CB146N37201 6.CB146N38700
Fan Type Cross-ow
Fan Diameter Length(DXL) mm Φ98X765
Cooling Speed(SH/H/M//L/SL) r/min 1350/1150/1000/850/-
Heating Speed(SH/H/M//L/SL) r/min 1400/1200/1000/900/-
Fan Motor Power Output W 35
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 2.5
Evaporator Form Aluminum Fin-copper Tube
Evaporator Pipe Diameter mm Φ7
Evaporator Row-n Gap mm 2-1.5
Evaporator Coil Length (LXDXW) mm 765X25.4X342.9
Swing Motor Model MP35XX
Swing Motor Power Output W 2.5
Fuse Current A 3.15
Sound Pressure Level(SH/H/M//L/SL) dB (A) 51/47/42/39/-
Sound Power Level(SH/H/M//L/SL) dB (A) 61/57/52/49/-
Dimension (WXHXD) mm 1007X315X219
Dimension of Carton Box (LXWXH) mm 1073X395X313
Dimension of Package(LXWXH) mm 1076X398X328
Net Weight kg 14
Gross Weight kg 17

10 Technical Information
Service Manual
Outdoor
Unit
Outdoor Unit Model GWH24KG-K3DNA6G/O
Outdoor Unit Product Code CB146W35901
Compressor Manufacturer ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
Compressor LRA. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Compressor Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Set Temperature Range ºC 16~30
Cooling Operation Ambient Temperature
Range ºC -15~43
Heating Operation Ambient Temperature
Range ºC -20~24
Condenser Form Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7
Condenser Rows-n Gap mm 2-1.4
Condenser Coil Length (LXDXW) mm 984X38.1X748
Fan Motor Speed rpm 800
Fan Motor Power Output W 90
Fan Motor RLA A /
Fan Motor Capacitor μF /
Outdoor Unit Air Flow Volume m3/h 4000
Fan Type Axial-ow
Fan Diameter mm Φ552
Defrosting Method Automatic Defrosting
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) 58/-/-
Sound Power Level (H/M/L) dB (A) 68/-/-
Dimension(WXHXD) mm 1000X790X427
Dimension of Carton Box (LXWXH) mm 1080X485X840
Dimension of Package(LXWXH) mm 1083X488X855
Net Weight kg 55.5
Gross Weight kg 60.5
Refrigerant R410A
Refrigerant Charge kg 1.80
Connection
Pipe
Connection Pipe Length m 5
Connection Pipe Gas Additional Charge g/m 50
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ16
Max Distance Height m 10
Max Distance Length m 25
Note: The connection pipe applies metric diameter.
The above data is subject to change without notice. Please refer to the nameplate of the unit.

11
Technical Information
Service Manual
2.2 Operation Characteristic Curve
2.3 Capacity Variation Ratio According to Temperature
01020304050607090010 20 30 40 50 60 70 80 90 100 120110
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
220V
230V
240V
220V
230V
240V
01020304050607090010 20 30 40 50 60 70 80 90 100
120
110
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
)A(tnerruC
220V
230V
240V
220V
230V
240V
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C/WB24°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB27°C/WB19°C
Outdoor: DB35°C/WB24°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB20°C/WB15°C
Outdoor: DB7°C/WB6°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB20°C/WB15°C
Outdoor: DB7°C/WB6°C
Indoor air flow: High
Pipe length: 5m
Cooling Heating
Cooling Heating
32 33 34 35 36 37 38 39 43 –15 –10 –5
40 41 42
100
105
95
90
85
80
75
70
65
60
55
50
110
100
90
80
70
60
50
40
05
710
Conditions
Indoor:DB27°C/WB19°C
Indoor air flow:Super High
Pipe length: 5m
Conditions
Indoor:DB20°C/WB15°C
Indoor air flow:Super High
Pipe length: 5m
Outdoor temp.(°C) Outdoor temp.(°C)
Capacity ratio (%)
Capacity ratio (%)
Cooling Heating
Cooling Heating
32 33 34 35 36 37 38 39 43
–15 –10 –5
40 41 42
100
105
95
90
85
80
75
70
65
60
55
50
110
100
90
80
70
60
50
40
05710
Conditions
Indoor:DB27°C/WB19°C
Indoor air flow:Super High
Pipe length: 5m
Conditions
Indoor:DB20°C/WB15°C
Indoor air flow:Super High
Pipe length: 5m
Outdoor temp.(°C) Outdoor temp.(°C)
Capacity ratio (%) Capacity ratio (%)
30
40
50
60
70
80
90
100
110
120
10
750-5-10-15-20
Outdoor temp.(oC)
Capacity ratio(%)
Conditions
Indoor:DB20°C/WB15°C
Indoor air flow:Super High
Pipe length: 5m
Cooling Heating
Heating operation ambient temperature range is -15°C~24°C
Heating operation ambient temperature range is -20°C~24°C

12 Technical Information
Service Manual
2.4 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
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/24 18K 0.9 to 1.1 12 to 14 75 to 37 Super High High 73
24K 80
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
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
20/15 7/6 18K 2.2 to 2.4 70 to 35 2 to 4 Super High High 75
24K 78
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:
2.5 Noise Curve
Indoor side noise when blowing Outdoor side noise when blowing
Indoor fan motor rotating speed
Compressor frequency(Hz)
Noise/dB(A)
50
60
30
40
20 Low Middle High Super High
24K
18K
40
42
44
46
48
50
52
54
56
20 4030 50 60 70 80
90
Noise dB(A)
18&24K Cooling
18&24K Heating

13
Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
Φ70
Φ70
70
90
45
45
40
Φ55 Φ55
Φ55
Φ55
40
41.3
41.3
71
161
54
54.5
120.5 548.5
WD
H
103
149 542 176
130 685 193
Φ70
Φ70
70
90
4545
40
Φ55 Φ55
Φ55
Φ55
40
41.3
41.3
71
161
54
54.5
120.5 548.5
WD
H
103
149 542 176
130 685 193
unit:mm
24K Unit
18K Unit
Models W H D
18K 867 305 215
24K 1008 319 221

14 Technical Information
Service Manual
3.2 Outdoor Unit
Unit:mm
24K Unit
18K Unit
963
892
700
396
341
368
560
4271000
920
610
370
790
395

15
Technical Information
Service Manual
4. Refrigerant System Diagram
Connection pipe specication:
Liquid pipe:1/4" (6mm)
Gas pipe:1/2" (12mm)(18K)
Gas pipe:5/8" (16mm)(24K)
Indoor unit Outdoor unit
COOLING
HEATING
4-Way valve
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(condenser)
Valve
Valve
Liquid pipe
side
Gas pipe
side
Strainer Electric
expand
valve
Strainer
Capillary
Compressor Accumlator

16 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.
SENSORSENSOR
AC-L
BK
PE
ROOMTUBE
M2
SWING-UD1
ROOM TEMP.
RT2
AP2
BN
PG
YEGN
M1
BU
FAN MOTOR
OUTDOOR UNIT
2
3
XT
N(1)
TUBE TEMP.
RT1
SWING
MOTOR
COM-OUT
N
PGF
CAP
JUMP
DISP2DISP1
AP1
RECEIVER AND
DISPLAY BOARD
EVAPORATOR
TERMINAL
BLOCK
L
L
BU
BK
BN
YEGN
PRINTED CIRCUIT BOARD
HEALTH-L
BU RD
HEALTH-N
GENERATOR
COLD PLASMA
θ
θ
GWH18KG-K3DNA5G/I GWH18KG-K3DNA6G/I GWH18KG-K3DNA9G/I(CB146N37301)
GWH18KG-K3DNB1G/I GWH18KG-K3DNB2G/I GWH18KG-K3DNB4G/I GWH24KG-K3DNA5G/I
GWH24KG-K3DNA6G/I GWH24KG-K3DNA9G/I(CB146N37201) GWH24KG-K3DNB1G/I
GWH24KG-K3DNB2G/I GWH24KG-K3DNB4G/I

17
Technical Information
Service Manual
● Outdoor Unit
GWH18KG-K3DNA6G/O(CB146W36000) GWH24KG-K3DNA6G/O(CB146W35900)
AP1
TEMP.SENSOR EXHAUST TEMP.SENSOR OUTROOM
OUTTUBE TEMP.SENSOR
BK
WH
BU YE X1
COMP
SAT
WH WH
OVC_COMP
RD
RT3RT2RT1 PE
PE
RD
BU YE
U(BU)V(YE)W(RD)
YEGN
T_SENSOR
OVERLOAD PROTECTOR
L3
MAGNETIC
RING
L3
L3
AC_L
N1
COM_INNER
PE
YEGN
PE
N
L
YEGN
BU
PE
N
L
N(1)
2
3
BN
BK
BU
XT1
INDOOR UNIT
L1
RING
BK
BN
BU
BN
BU
YEGN
BLOCK
TERMINAL
PE
MAGNETIC
PE
M1
4-WAY
4YV
VALVE
VT VT
OFAN4WAY
FAN MOTOR
YEGN
PE
L1
PRINTED CIRCUIT BOARD
UV W
L1
COMP.
θθθ
POWER
Please don't touch any terminal
when the voltage of terminal
P(DC+) and N(DC-) at AP1 is
higher than 30V to prevent the
risk of electric shock !
WARNING
BN
20K15K 50K
L2
GWH18KG-K3DNA9G/I(CB146N37300) GWH24KG-K3DNA9G/I(CB146N37200)
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