Gree GWH18MC-K3DNA2G User manual

GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Change for Life
Service Manual
GWH18MC-K3DNA2G
GWH18MC-K3DNA3G
GWH18MC-K3DNA5G
GWH18MC-K3DNB3G
GWH18MC-K3DNC9G
GWH18MC-K3DND3G
GWH18MC-K3DNE3G
GWH24MD-K3DNA2G
GWH24MD-K3DNA3G
Models: GWH24MD-K3DNA5G
GWH24MD-K3DNB3G
GWH24MD-K3DNC9G
GWH24MD-K3DND3G
GWH24MD-K3DNE3G
(Refrigerant:R410A)

Service Manual
Table of Contents
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 .....................................................................................................20
6. Function and Control ......................................................................................22
6.1 Remote Controller Introduction .....................................................................................22
6.2 Brief Description of Modes and Functions ......................................................................26
Part Ⅱ: Installation and Maintenance .................................................35
7. Notes for Installation and Maintenance ..........................................35
8. Installation ................................................................................................................37
8.1 Installation Dimension Diagram ......................................................................................37
8.2 Installation Parts-checking ............................................................................................39
8.3 Selection of Installation Location ....................................................................................39
8.4 Electric Connection Requirement ..................................................................................39
8.5 Installation of Indoor Unit ................................................................................................39
8.6 Installation of Outdoor Unit .............................................................................................42
8.7 Vacuum Pumping and Leak Detection ...........................................................................43
8.8 Check after Installation and Test Operation ...................................................................43

Table of Contents
Service Manual
Table of Contents Table of Contents
9. Maintenance ............................................................................................................44
9.1 Malfunction Display of Indoor Unit ..................................................................................44
9.2 Procedure of Troubleshooting ........................................................................................46
9.4 Troubleshooting for Normal Malfunction .........................................................................63
10. Exploded View and Parts List ..............................................................65
10.1 Indoor Unit ....................................................................................................................65
10.2 Outdoor Unit .................................................................................................................76
11. Removal Procedure .......................................................................................80
11.1 Removal Procedure of Indoor Unit ...............................................................................80
11.2 Removal Procedure of Outdoor Unit ............................................................................85
Appendix: ........................................................................................................................96
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................96
Appendix 2: Conguration of Connection Pipe .....................................................................96
Appendix 3: Pipe Expanding Method ...................................................................................97
Appendix 4: List of Resistance for Temperature Sensor ......................................................98

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit
E3 panel
D3 panel
C9 panel
B3 panel
A5 panel
A2 panel
A3 panel

2Technical Information
Service Manual
Outdoor Unit
GWH18MC-K3DNE3G/O
Remote Controller
YT1F(MOTO)
FAN
MODE
IF E EL
CLOCK TIMER
ON
X-FAN TEMP TIMER
OFF
TURBO SLEEP LIG HT
GWH24MD-K3DNE3G/O

3
Technical Information
Service Manual
2. Specications
2.1 Specication Sheet
Model
1.GWH18MC-K3DNE3G
2.GWH18MC-K3DNC9G
3.GWH18MC-K3DND3G
1.GWH18MC-K3DNA2G
2.GWH18MC-K3DNA3G
3.GWH18MC-K3DNA5G
4.GWH18MC-K3DNB3G
Product Code 1.CB404003400 2.CB145005900
3.CB405004300
1.CB181007500 2.CB171011700
3.CB180001400 4.CB163006800
Power
Supply
Rated Voltage V~ 220-240 220-240
Rated Frequency Hz 50 50
Phases 1 1
Power Supply Mode outdoor outdoor
Cooling Capacity(Min~Max) W 5275(1260~6600) 5275(1260~6600)
Heating Capacity(Min~Max) W 5800(1120~6800) 5800(1120~6800)
Cooling Power Input(Min~Max) W 1625(380~2650) 1625(380~2650)
Heating Power Input(Min~Max) W 1760(350~2650) 1760(350~2650)
Cooling Power Current A 7.2 7.2
Heating Power Current A 7.8 7.8
Rated Input W 2650 2650
Rated Current A 11.8 11.8
Air Flow Volume(SH/H/M/L/SL) m3/h 850/780/650/550/- 850/780/650/550/-
Dehumidifying Volume L/h 1.80 1.80
EER W/W 3.25 3.25
COP W/W 3.30 3.30
SEER W/W 6.1 6.1
HSPF W/W / /
Application Area m223-34 23-34
Indoor
Unit
Model of Indoor Unit
1.GWH18MC-K3DNE3G/I
2.GWH18MC-K3DNC9G/I
3.GWH18MC-K3DND3G/I
1.GWH18MC-K3DNA2G/I
2.GWH18MC-K3DNA3G/I
3.GWH18MC-K3DNA5G/I
4.GWH18MC-K3DNB3G/I
Product Code of Indoor Unit 1.CB404N03400 2.CB145N05900
3.CB405N04300
1.CB181N07500 2.CB171N11700
3.CB180N01400 4.CB163N06800
Fan Type Cross-ow Cross-ow
Diameter Length(DXL) mm Φ98X710 Φ98X710
Fan Motor Cooling Speed (SH/H/M/L/SL) r/min 1350/1150/1050/900/- 1350/1150/1050/900/-
Fan Motor Heating Speed (SH/H/M/L/SL) r/min 1420/1250/1150/1050/- 1420/1250/1150/1050/-
Output of Fan Motor W 20 20
Fan Motor RLA A 0.31 0.31
Fan Motor Capacitor μF 1.5 1.5
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 715X25.4X304.8 715X25.4X304.8
Swing Motor Model MP28VB MP28VB
Output of Swing Motor W 2 2
Fuse A 3.15 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 48/43/40/35/- 48/43/40/35/-
Sound Power Level (SH/H/M/L/SL) dB (A) 58/53/50/45/- 58/53/50/45/-
Dimension (WXHXD) mm 940X298X200 940X298X200
Dimension of Carton Box (LXWXH) mm 1010X380X285 1010X380X285
Dimension of Package (LXWXH) mm 1013X383X300 1013X383X300
Net Weight kg 12 12
Gross Weight kg 15 15

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 GWH18MC-K3DNE3G/O
Product Code of Outdoor Unit CB404W03400
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
L.R.A. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Operation temp oC 16~30
Ambient temp (cooling) oC -15~43
Ambient temp (heating) oC -15~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 851X38.1X660
Fan Motor Speed rpm 750
Output of Fan Motor W 60
Fan Motor RLA A /
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit m3/h 3200
Fan Type Axial-ow
Fan Diameter mm Φ520
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) 56/-/-
Sound Power Level (H/M/L) dB (A) 66/-/-
Dimension (WXHXD) mm 963X700X396
Dimension of Carton Box (LXWXH) mm 1026X455X735
Dimension of Package (LXWXH) mm 1029X458X750
Net Weight kg 45
Gross Weight kg 49.5
Refrigerant R410A
Refrigerant Charge kg 1.35
Connection
Pipe
Length m 5
Gas Additional Charge g/m 20
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ12
Max Distance Height m 10
Max Distance Length m 25
Note: The connection pipe applies metric diameter.

5
Technical Information
Service Manual
Model 1.GWH18MC-K3DNC9G 2.GWH18MC-K3DNE3G
3.GWH18MC-K3DNB3G 4.GWH18MC-K3DNA2G
Product Code 1.CB145005902 2.CB404003401
3.CB163006801 4.CB181007502
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode outdoor
Cooling Capacity(Min~Max) W 5275(1260~6600)
Heating Capacity(Min~Max) W 5800(1120~6800)
Cooling Power Input(Min~Max) W 1625(380~2650)
Heating Power Input(Min~Max) W 1760(350~2650)
Cooling Power Current A 7.2
Heating Power Current A 7.8
Rated Input W 2650
Rated Current A 11.8
Air Flow Volume(SH/H/M/L/SL) m3/h 850/780/650/550/-
Dehumidifying Volume L/h 1.80
EER W/W 3.25
COP W/W 3.30
SEER W/W 6.1
HSPF W/W /
Application Area m223-34
Indoor
Unit
Model of Indoor Unit 1.GWH18MC-K3DNC9G/I 2.GWH18MC-K3DNE3G/I
3.GWH18MC-K3DNB3G/I 4.GWH18MC-K3DNA2G/I
Product Code of Indoor Unit 1.CB145N05900 2.CB404N03401
3.CB163N06801 4.CB181N07500
Fan Type Cross-ow
Diameter Length(DXL) mm Φ98X710
Fan Motor Cooling Speed (SH/H/M/L/SL) r/min 1350/1150/1050/900/-
Fan Motor Heating Speed (SH/H/M/L/SL) r/min 1420/1250/1150/1050/-
Output of Fan Motor W 20
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 1.5
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Row-n Gap mm 2-1.4
Coil Length (LXDXW) mm 715X25.4X304.8
Swing Motor Model MP28VB
Output of Swing Motor W 2
Fuse A 3.15
Sound Pressure Level (SH/H/M/L/SL) dB (A) 48/43/40/35/-
Sound Power Level (SH/H/M/L/SL) dB (A) 58/53/50/45/-
Dimension (WXHXD) mm 940X298X200
Dimension of Carton Box (LXWXH) mm 1010X380X285
Dimension of Package (LXWXH) mm 1013X383X300
Net Weight kg 12
Gross Weight kg 15

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 GWH18MC-K3DNE3G/O
Product Code of Outdoor Unit CB404W03401
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
L.R.A. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Operation temp oC 16~30
Ambient temp (cooling) oC -15~43
Ambient temp (heating) oC -20~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 851X38.1X660
Fan Motor Speed rpm 750
Output of Fan Motor W 60
Fan Motor RLA A /
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit m3/h 3200
Fan Type Axial-ow
Fan Diameter mm Φ520
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) 56/-/-
Sound Power Level (H/M/L) dB (A) 66/-/-
Dimension (WXHXD) mm 963X700X396
Dimension of Carton Box (LXWXH) mm 1026X455X735
Dimension of Package (LXWXH) mm 1029X458X750
Net Weight kg 45
Gross Weight kg 49.5
Refrigerant R410A
Refrigerant Charge kg 1.35
Connection
Pipe
Length m 5
Gas Additional Charge g/m 20
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ12
Max Distance Height m 10
Max Distance Length m 25
Note: The connection pipe applies metric diameter.

7
Technical Information
Service Manual
Model 1.GWH24MD-K3DNC9G 2.GWH24MD-K3DNE3G
3.GWH24MD-K3DNA2G
Product Code 1.CB145005802 2.CB404003801
3.CB181007601
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode outdoor
Cooling Capacity(Min~Max) W 6450(2530~6800)
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 Power Current A 9.7
Heating Power Current A 9.8
Rated Input W 2800
Rated Current A 12.4
Air Flow Volume(SH/H/M/L/SL) m3/h 1000/800/700/550/-
Dehumidifying Volume L/h 2.0
EER W/W 2.96
COP W/W 3.15
SEER W/W 6.1
HSPF W/W /
Application Area m227-42
Indoor
Unit
Model of Indoor Unit 1.GWH24MD-K3DNC9G/I 2.GWH24MD-K3DNE3G/I
3.GWH24MD-K3DNA2G/I
Product Code of Indoor Unit 1.CB145N05800 2.CB404N03800
3.CB181N07601
Fan Type Cross-ow
Diameter Length(DXL) mm Φ100X765
Fan Motor Cooling Speed (SH/H/M/L/SL) r/min 1350/1150/950/850/-
Fan Motor Heating Speed (SH/H/M/L/SL) r/min 1400/1200/1000/900/-
Output of Fan Motor W 35
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 2.5
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Row-n Gap mm 2-1.5
Coil Length (LXDXW) mm 765X25.4X342.9
Swing Motor Model MP35XX
Output of Swing Motor W 2.5
Fuse 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 15
Gross Weight kg 18.5

8Technical 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 GWH24MD-K3DNE3G/O
Product Code of Outdoor Unit CB404W03801
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
L.R.A. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Operation temp oC 16~30
Ambient temp (cooling) oC -15~43
Ambient temp (heating) oC -20~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 984X38.1X748
Fan Motor Speed rpm 800
Output of Fan Motor W 90
Fan Motor RLA A /
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit 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
Gross Weight kg 60
Refrigerant R410A
Refrigerant Charge kg 1.80
Connection
Pipe
Length m 5
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.

9
Technical Information
Service Manual
Model
1.GWH24MD-K3DNE3G 2.GWH24MD-K3DNA2G 3.GWH24MD-K3DNA3G
4.GWH24MD-K3DNA5G 5.GWH24MD-K3DNB3G 6.GWH24MD-K3DNC9G
7.GWH24MD-K3DND3G
Product Code
1.CB404003800 2.CB181007600 3.CB171011500
4.CB162010100 5.CB163006900 6.CB145005800
7.CB405004200
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50
Phases 1
Power Supply Mode outdoor
Cooling Capacity(Min~Max) W 6450(2530~6800)
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 Power Current A 9.7
Heating Power Current A 9.8
Rated Input W 2800
Rated Current A 12.4
Air Flow Volume(SH/H/M/L/SL) m3/h 1000/800/700/550/-
Dehumidifying Volume L/h 2.0
EER W/W 2.96
COP W/W 3.15
SEER W/W 6.1
HSPF W/W /
Application Area m227-42
Indoor
Unit
Model of indoor unit
1.GWH24MD-K3DNE3G/I 2.GWH24MD-K3DNA2G/I 3.GWH24MD-K3DNA3G/I
4.GWH24MD-K3DNA5G/I 5.GWH24MD-K3DNB3G/I 6.GWH24MD-K3DNC9G/I
7.GWH24MD-K3DND3G/I
Product Code of Indoor Unit
1.CB404N03800 2.CB181N07600 3.CB171N11500
4.CB162N10100 5.CB163N06900 6.CB145N05800
7.CB405N04200
Fan Type Cross-ow
Diameter Length(DXL) mm Φ100X765
Fan Motor Cooling Speed (SH/H/M/L/SL) r/min 1350/1150/950/850/-
Fan Motor Heating Speed (SH/H/M/L/SL) r/min 1400/1200/1000/900/-
Output of Fan Motor W 35
Fan Motor RLA A 0.31
Fan Motor Capacitor μF 2.5
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Row-n Gap mm 2-1.5
Coil Length (LXDXW) mm 765X25.4X342.9
Swing Motor Model MP35XX
Output of Swing Motor W 2.5
Fuse 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 15
Gross Weight kg 18.5

10 Technical 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 GWH24MD-K3DNE3G/O
Product Code of Outdoor Unit CB404W03800
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Oil 68EP
Compressor Type Rotary
L.R.A. A 25
Compressor RLA A 7.2
Compressor Power Input W 1440
Overload Protector 1NT11L-6233 or KSD115oC or HPC115/95U1
Throttling Method Capillary
Operation temp oC 16~30
Ambient temp (cooling) oC -15~43
Ambient temp (heating) oC -15~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 984X38.1X748
Fan Motor Speed rpm 800
Output of Fan Motor W 90
Fan Motor RLA A /
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit 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
Gross Weight kg 60
Refrigerant R410A
Refrigerant Charge kg 1.80
Connection
Pipe
Length m 5
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.

11
Technical Information
Service Manual
2.2 Operation Characteristic Curve
2.3 Capacity Variation Ratio According to Temperature
0 10 20 30 40 50 60 70 90 0 10 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 ( t n e r r u C
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
) A ( t n e r r u C
220V
230V
240V
220V
230V
240V
0 10 20 30 40 50 60 70 90 0 10 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
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
0 5 7 10
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
0 5 7 10
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
10750-5-10-15-20
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(oC)
(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 (oC) T2 (oC)
27/19 35/24
18K 0.8 to 1.0 12 to 14 80 to 40 Super High High 70
24K 0.9 to 1.1 10 to 12 80 to 40 Super High High 83
Rated heating
condition(oC)
(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 (oC) T2 (oC)
20/15 7/6
18K 2.2 to 2.4 70 to 40 1 to 5 Super High High 70
24K 2.5 to 2.7 70 to 40 1 to 5 Super High High 75
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
20
30
40
50
60
20 0 40 60 80 100
Outdoor side noise
Indoor side noise
Compressor frequency/Hz
) A ( B d / e s i o N
18K 24K 18K 24K
60
50
40
30
20
10
0
Indoor Fan Motor Rotating Speed
Noice/dB(A)
low Middle High Super High

13
Technical Information
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
Unit:mm
Models W H D
18K 940 298 200
24K 1007 315 219
H
W
D
24K
18K
52 694 194
685138 184
Φ70
Φ55
Φ55
Φ70
38
90 65
116

14 Technical Information
Service Manual
3.2 Outdoor Unit
Unit:mm
24K
18K
963
892
700
396
341
368
560
427 1000
920
610
370
790
395

15
Technical Information
Service Manual
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 Capillary Strainer
Accumlator
Compressor
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)

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.
GWH18MC-K3DNE3G/I(CB404N03400) GWH18MC-K3DNA2G/I GWH18MC-K3DNA3G/I GWH18MC-K3DNA5G/I
GWH18MC-K3DNB3G/I(CB163N06800) GWH18MC-K3DNC9G/I GWH18MC-K3DND3G/I
PRINTED CIRCUIT BOARD
YEGN
BN
BK
BU
(SWING)
L
LBLOCK
TERMINAL
EVAPORATOR
DISPLAY BOARD
RECEIVER AND
AP1
DISP1 DISP2
JUMP
CAP
PGF
N
COM-OUT
MOTOR
SWING
RT1
TUBE TEMP.
N(1)
XT
3
2
OUTDOOR UNIT
FAN MOTOR
BU
M1
YEGN
PG
BN
AP2
RT2
ROOM TEMP.
SWING-UD
M2
TUBE ROOM
PE
BK
L(AC-L)
SENSOR SENSOR
θ
θ

17
Technical Information
Service Manual
GWH24MD-K3DNE3G/I GWH24MD-K3DNA5G/I
GWH18MC-K3DNE3G/I(CB404N03401) GWH18MC-K3DNB3G/I(CB163N06801)
SENSORSENSOR
L(AC-L)
BK
PE
ROOMTUBE
M2
SWING-UD
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
(SWING)
BU
BK
BN
YEGN
PRINTED CIRCUIT BOARD
HEALTH-L
BU RD
HEALTH-N
GENERATOR
COLD PLASMA
θ
θ
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