Gree GWHD(24)NK3FO User manual

GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Change for Life
Service Manual
Models: GWHD(18)NK3FO
GWHD(24)NK3FO
GWHD(24)NK3GO
GWHD(28)NK3FO
GWHD(36)NK3BO
GWHD(42)NK3AO
GWHD(42)NK3BO
(Refrigerant:R410A)

Service Manual
Table of Contents
Table of Contents
Part Ė: Technical Information.......................................................................1
1. Summary......................................................................................................................1
..........................................................................................................2
3. Outline Dimension Diagram......................................................................10
4. Refrigerant System Diagram....................................................................12
5. Electrical Part.........................................................................................................14
5.1 Wiring Diagram ......................................................................................... 14
5.2 PCB Printed Diagram................................................................................ 21
6. Function and Control......................................................................................25
Part ė: Installation and Maintenance .................................................30
7. Notes for Installation and Maintenance..........................................30
8. Installation Manual............................................................................................32
8.1 Electrical Connections............................................................................... 33
8.2 Installing the Outdoor Unit......................................................................... 36
8.3 Installation Dimension Diagram ................................................................ 37
8.4 Check after Installation.............................................................................. 38
9. Maintenance............................................................................................................48
9.1 Precautions before Performing Inspection or Repair ................................ 48
9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement................ 49
9.3 Malfunction Checking and Elimination ...................................................... 50
9.4 Maintenance Method for Normal Malfunction ........................................... 74
10. Exploded View and Parts List ..............................................................76
11. Removal Procedure.......................................................................................87
Appendix:......................................................................................................................107
Appendix 1: Reference Sheet of Celsius and Fahrenheit ............................. 107
 ............................................. 107
Appendix 3: Pipe Expanding Method............................................................ 108
Appendix 4: List of Resistance for Temperature Sensor ............................... 109

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Outdoor Unit
GWHD(18)NK3FO GWHD(24)NK3FO
GWHD(24)NK3GO
GWHD(28) NK3FO
GWHD(42)NK3AO
GWHD(42)NK3BO
GWHD(36)NK3BO

2Technical Information
Service Manual
Model GWHD(18)NK3FO
Product Code CB228W03500/CB228W03501
Power
supply
Rated Voltage V~ 220-240V
Rated Frequency Hz 50
Phases 1
Cooling capacity(max~min) W 5000(2050~6200)
Heating capacity(max~min) W 5600(2500~6650)
Cooling Power Input(max~min) W 1550(500~2550)
Heating Power Input(max~min) W 1550(580~2700)
Cooling Current Input A 6.88
Heating Current Input A 6.88
Rated Power Input W 2700
Rated Current A 11.98
SEER W/W 5.6
SCOP W/W 3.8
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXA-B141zF030A
Compressor Refrigerant Oil Type RB68EP
Compressor Type Rotary
L.R.A A /
Compressor Rated Load Amp (RLA) A 7.2
Compressor Power Input W 1440
Compressor Thermal Protector 1NT11L-6233
Throttling Method Electron expansion valve
Cooling Operation Ambient Temperature Range OC -15~48
Heating Operation Ambient Temperature Range OC -15~24
Condenser Material Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7
Rows-Fin Gap(mm) mm 2-1.4
Coil length (l) X height (H) X coil width (L) mm 851X38.1X660
Fan Motor Speed (rpm) (H/M/L) rpm 630
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-Piece 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
Dimension (WXHXD) mm 963X700X396
Dimension of Package (LXWXH) mm 1026X455X735
Dimension of Package(LXWXH) mm 1029X458X750
Net Weight kg 50
Gross Weight kg 55
efrigerant Charge R410A
Refrigerant Charge kg 1.40
2. Specications

3
Technical Information
Service Manual
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor mm22.50
Recommended Power Cable(Core) N 3
Connection Pipe Connection Method - Flare Connection
Not Additional Gas Connection Pipe Length m 5
Connection Pipe Gas Additional Charge g/m 20
Outer Diameter of Liquid Pipe(GREE Allocation)
(Metric) mm Φ6
Outer Diameter of Gas Pipe(GREE Allocation)
(Metric) mm Φ9.52
Connection Pipe Max. Height Distance(indoor and
indoor) m 5
Max. equivalent connection pipe length(outdoor to
last indoor) m 10
Connection Pipe Max. Length Distance(total lenght) m 20

4Technical Information
Service Manual
Model GWHD(24)NK3FO GWHD(24)NK3GO
Product Code CB228W03301 CB228W03401/CB228W03400
Power
supply
Rated Voltage V~ 220-240V 220-240V
Rated Frequency Hz 50 50
Phases 1 1
Cooling capacity(max~min) W 7000(2200~10000) 7100(2200~10000)
Heating capacity(max~min) W 7700(2600~11000) 8500(3600~11000)
Cooling Power Input(max~min) W 2460(650~4550) 2400(650~4550)
Heating Power Input(max~min) W 2560(980~3950) 2350(980~3950)
Cooling Current Input A 10.91 10.91
Heating Current Input A 11.36 11.36
Rated Power Input W 4550 4550
Rated Current A 20.19 20.19
SEER W/W 5.1 5.1
SCOP W/W 3.8 3.8
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA
COMPRESSOR CO.,LTD ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXAS-D23zX090B QXAS-D23zX090B
Compressor Refrigerant Oil Type RB68EP RB68EP
Compressor Type Rotary Rotary
L.R.A A / /
Compressor Rated Load Amp (RLA) A 11.5 11.5
Compressor Power Input W 2550 2550
Compressor Thermal Protector 1NT11L-6233 1NT11L-6233
Throttling Method Electron expansion valve Electron expansion valve
Cooling Operation Ambient Temperature Range OC -15~48 -15~48
Heating Operation Ambient Temperature Range OC -15~24 -15~24
Condenser Material Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7 Φ7
Rows-Fin Gap(mm) mm 2-1.4 2-1.4
Coil length (l) X height (H) X coil width (L) mm 982.2X38.1X748 982.2X38.1X748
Fan Motor Speed (rpm) (H/M/L) rpm 710 710
Output of Fan Motor W 90 90
Fan Motor RLA A / /
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit m3/h 4000 4000
Fan Type-Piece Axial-ow Axial-ow
Fan Diameter mm Φ552 Φ552
Defrosting Method Automatic Defrosting Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IP24 IP24
Permissible Excessive Operating Pressure for the
Discharge Side MPa 4.3 4.3
Permissible Excessive Operating Pressure for the
Suction Side MPa 2.5 2.5
Dimension (WXHXD) mm 1001X790X427 1001X790X427
Dimension of Package (LXWXH) mm 1080X485X840 1080X485X840
Dimension of Package(LXWXH) mm 1083X488X855 1083X488X855
Net Weight kg 68 69
Gross Weight kg 73 74
efrigerant Charge R410A R410A
Refrigerant Charge kg 2.00 2.20

5
Technical Information
Service Manual
The above data is subject to change without notice. Please refer to the nameplate of the unit.
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor mm22.50 2.50
Recommended Power Cable(Core) N 3 3
Connection Pipe Connection Method - Flare Connection Flare Connection
Not Additional Gas Connection Pipe Length m 5 5
Connection Pipe Gas Additional Charge g/m 20 20
Outer Diameter of Liquid Pipe(GREE Allocation)
(Metric) mm Φ6 Φ6
Outer Diameter of Gas Pipe(GREE Allocation)
(Metric) mm Φ9.52 Φ9.52
Connection Pipe Max. Height Distance(indoor and
indoor) m 5 10
Max. equivalent connection pipe length(outdoor to
last indoor) m 10 20
Connection Pipe Max. Length Distance(total lenght) m 20 60

6Technical Information
Service Manual
Model GWHD(28)NK3FO
Product Code CB228W03600/CB228W03601
Power
supply
Rated Voltage V~ 220-240V
Rated Frequency Hz 50
Phases 1
Cooling capacity(max~min) W 8000(2200~10000)
Heating capacity(max~min) W 9300(2800~11000)
Cooling Power Input(max~min) W 2490(650~4550)
Heating Power Input(max~min) W 2580(980~3950)
Cooling Current Input A 11.05
Heating Current Input A 11.45
Rated Power Input W 4550
Rated Current A 20.19
SEER W/W 5.1
SCOP W/W 3.8
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD
Compressor Model QXAS-D23zX090B
Compressor Refrigerant Oil Type RB68EP
Compressor Type Rotary
L.R.A A /
Compressor Rated Load Amp (RLA) A 11.5
Compressor Power Input W 2550
Compressor Thermal Protector 1NT11L-6233
Throttling Method Electron expansion valve
Cooling Operation Ambient Temperature Range OC -15~48
Heating Operation Ambient Temperature Range OC -15~24
Condenser Material Aluminum Fin-copper Tube
Condenser Pipe Diameter mm Φ7
Rows-Fin Gap(mm) mm 2-1.4
Coil length (l) X height (H) X coil width (L) mm 982.2X38.1X748
Fan Motor Speed (rpm) (H/M/L) rpm 710
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-Piece 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
Dimension (WXHXD) mm 1001X790X427
Dimension of Package (LXWXH) mm 1080X485X840
Dimension of Package(LXWXH) mm 1083X488X855
Net Weight kg 69
Gross Weight kg 74
efrigerant Charge R410A
Refrigerant Charge kg 2.20

7
Technical Information
Service Manual
Outdoor
Unit
Cross-sectional Area of Power Cable Conductor mm22.50
Recommended Power Cable(Core) N 3
Connection Pipe Connection Method - Flare Connection
Not Additional Gas Connection Pipe Length m 5
Connection Pipe Gas Additional Charge g/m 20
Outer Diameter of Liquid Pipe(GREE Allocation)
(Metric) mm Φ6
Outer Diameter of Gas Pipe(GREE Allocation)
(Metric) mm Φ9.52
Connection Pipe Max. Height Distance(indoor and
indoor) m 10
Max. equivalent connection pipe length(outdoor to
last indoor) m 20
Connection Pipe Max. Length Distance(total lenght) m 70
The above data is subject to change without notice. Please refer to the nameplate of the unit.

8Technical Information
Service Manual
Model GWHD(36)NK3BO GWHD(42)NK3AO GWHD(42)NK3BO
Product Code CN860W0131 CN860W0021 CN860W0270
Power
supply
Rated Voltage V~ 220-240V 220-240V 220-240V
Rated Frequency Hz 50 50 50
Phases 1 1 1
Cooling capacity(max~min) W 10500(2100~11000) 12100(2100~13600) 12100(2100~13600)
Heating capacity(max~min) W 12000(2600~13000) 13000(2600~14000) 13000(2600~14000)
Cooling Power Input W 3500 3590 3760
Heating Power Input W 3750 3550 3450
Cooling Current Input A 15.42 16.43 17.21
Heating Current Input A 15.20 16.22 15.79
Rated Power Input W 4880 5300 5020
Rated Current A 21.65 23.50 22.97
SEER W/W 5.5 / /
SCOP W/W 3.8 / /
Outdoor
Unit
Compressor Trademark ZHUHAI LANDA COMPRESSOR
CO.,LTD
MITSUBISHI
ELECTRIC(GUANGZHOU)
COMPRESSOR CO.LTD
ZHUHAI LANDA
COMPRESSOR CO.,LTD
Compressor Model QXAS-D32zX090A TNB306FPGMC QXAS-D32zX090A
Compressor Refrigerant Oil Type RB68ER PVE(PV50S) RB68ER
Compressor Type Inverter Rotary Inverter Rotary Inverter Rotary
L.R.A A / / /
Compressor Rated Load Amp
(RLA) A 14 13.5 14
Compressor Power Input W 3300 3010 3300
Compressor Thermal Protector Internal Internal Internal
Throttling Method Electron expansion valve Electron expansion valve Electron expansion valve
Cooling Operation Ambient
Temperature Range OC -15~48 -15~48 -15~48
Heating Operation Ambient
Temperature Range OC -15~27 -15~27 -15~27
Condenser Material Copper tube-Aluminum
n Copper tube-Aluminum n Copper tube-Aluminum n
Condenser Pipe Diameter mm Φ7.94 Φ7.94 Φ7.94
Rows-Fin Gap(mm) mm 2-1.4 2-1.4 2-1.4
Coil length (l) X height (H) X coil
width (L) mm 1009.4X38.1X1056 1009.4X38.1X1056 1009.4X38.1X1056
Fan Motor Speed (rpm) (H/M/L) rpm 820 840/620/520 820
Output of Fan Motor W 170 140 170
Fan Motor RLA A / / /
Fan Motor Capacitor μF / / /
Air Flow Volume of Outdoor Unit m3/h 5200 5500 5200
Fan Type-Piece Axial-ow Axial-ow Axial-ow
Fan Diameter mm Φ570-152 Φ570-152 Φ570-152
Defrosting Method Automatic Defrosting Automatic Defrosting Automatic Defrosting
Climate Type T1 T1 T1
Isolation I I I
Moisture Protection IPX4 IPX4 IPX4
Permissible Excessive Operating
Pressure for the Discharge Side MPa 4.3 4.3 4.3
Permissible Excessive Operating
Pressure for the Suction Side MPa 2.5 2.5 2.5
Dimension (WXHXD) mm 1015X440X1103 1015X440X1103 1015X440X1103
Dimension of Package (LXWXH) mm 1155X490X1220 1155X490X1220 1155X490X1220
Dimension of Package(LXWXH) mm 1158X493X1235 1158X493X1235 1158X493X1235
Net Weight kg 94 102 95

9
Technical Information
Service Manual
The above data is subject to change without notice. Please refer to the nameplate of the unit.
Outdoor
Unit
Gross Weight kg 104 112 105
efrigerant Charge R410A R410A R410A
Refrigerant Charge kg 4.3 4.8 4.8
Cross-sectional Area of Power
Cable Conductor mm24.0 4.0 4.0
Recommended Power Cable(Core) N 3 / 3
Connection Pipe Connection
Method - Flare Connection Flare Connection Flare Connection
Not Additional Gas Connection
Pipe Length m 40 50 50
Connection Pipe Gas Additional
Charge g/m 22 22 22
Outer Diameter of Liquid
Pipe(GREE Allocation)(Metric)1 mm Φ6 Φ6 Φ6
Outer Diameter of Gas Pipe(GREE
Allocation)(Metric)1 mm Φ9.52 Φ9.52 Φ9.52
Outer Diameter of Liquid
Pipe(GREE Allocation)(Metric)2 Φ6 Φ6 Φ6
Outer Diameter of Gas Pipe(GREE
Allocation)(Metric)2 Φ9.52 Φ9.52 Φ9.52
Outer Diameter of Liquid
Pipe(GREE Allocation)(Metric)3 Φ6 Φ6 Φ6
Outer Diameter of Gas Pipe(GREE
Allocation)(Metric)3 Φ12 Φ12 Φ12
Outer Diameter of Liquid
Pipe(GREE Allocation)(Metric)4 Φ9.52 Φ6 Φ6
Outer Diameter of Gas Pipe(GREE
Allocation)(Metric)4 Φ16 Φ12 Φ12
Outer Diameter of Liquid
Pipe(GREE Allocation)(Metric)5 /Φ9.52 Φ9.52
Outer Diameter of Gas Pipe(GREE
Allocation)(Metric)5 /Φ16 Φ16
Connection Pipe Max. Height
Distance(indoor and indoor) m 7.5 7.5 7.5
Max. equivalent connection pipe
length(outdoor to last indoor) m 20 25 25
Connection Pipe Max. Length
Distance(total lenght) m 70 80 80

10 Technical Information
Service Manual
3. Outline Dimension Diagram
892 341
396
963
560
700
368
(1)Model:GWHD(18)NK3FO
924 370
4271001
790
399
610
Unit:mm
(2)Models:GWHD(24)NK3FO GWHD(24)NK3GO GWHD(28) NK3FO

11
Technical Information
Service Manual
(4)Model:GWHD(42)NK3AO GWHD(42)NK3BO
950 341
4121022
572
840
378
Unit:mm
1015 360
4401087
631
1103
401
Unit:mm
360
440
631
1103
401
Unit:mm
1087
1015
(3)Model:GWHD(36)NK3BO

12 Technical Information
Service Manual
4. Refrigerant System Diagram
outdoor
indoor
D1
C1
B1
A1
filter
A heat exchanger
gas -liquid separator
inverter compressor
discharge silencer
discharge temperature
sensor
SP
4-way valve
outdoor heat exchanger
fan
high pressure switch
B heat exchanger
C heat exchanger
D heat exchanger
filter
filter
filter
filter
Note: Not available for 14K/18K
model
C2
C3
D3
D2
B3
B2
A2
A3
A1:
A－unit electronic expansion valve B1:B-unit electronic expansion valve
C1:C-unit electronic expansion valve D1:D-unit electronic expansion valve
A2:A-unit gas pipe temperature sensor B2:B-unit gas pipe temperature senso
r
C2:C-unit gas pipe temperature sensor D2:D-unit gas pipe temperature senso
r
A3:
A－unit liquid pipe temperature sensor B3:B-unit liquid pipe temperature sensor
C3:C-unit liquid pipe temperature sensor D3:D-unit liquid pipe temperature senso
r
Note: Not available for 18K model
Models:GWHD(18)NK3FO GWHD(24)NK3FO GWHD(24)NK3GO GWHD(28) NK3FO

13
Technical Information
Service Manual
Models:GWHD(36)NK3BO,GWHD(42)NK3AO,GWHD(42)NK3BO
M
Liquid Receiver
Outdoor Unit
Indoor Unit
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heating
Cooling
Compressor
Gas/Liquid Separator
Stop Valve
Four-way Valve
Capillary Oil Separator
Electronic
Expansion V
alve
The outdoor and indoor units start to work once the power is switched on. During the cooling operation, the low
temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together and then is
taken into the compressor to be compressed into high temperature, high pressure gas, which will soon go to
the heat exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into refrigerant
liquid. After passing through the throttling device, the temperature and pressure of the refrigerant liquid will further
decrease and then go the main valve. After that, it will be divided and go to the heat exchanger of each indoor
unit to exchange heat with the air which needs to be conditioned. Consequently, the refrigerant liquid become low
temperature, low pressure refrigerant gas again. Such a refrigeration cycle goes round and round to achieve the
desired cooling purpose. During the heating operation, the four-way valve is involved to make the refrigeration
cycle run reversely. The refrigerant radiates heat in the heat exchanger of the indoor unit (so do the electric
heating devices) and absorb heat in the heat exchanger of the outdoor unit for a heat pump heating cycle so as to
achieve the desired heating purpose.

14 Technical Information
Service Manual
5. Electrical Part
5.1 Wiring Diagram
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN GREEN COMP Compressor
YE Yellow BN Brown Grouding wire
RD Red BU Blue
YEGN Yellow/Green BK Black
VT Violet OG Orange
● Outdoor Unit
●Instruction
(1)Model:GWHD(18)NK3FO(CB228W03501)
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15
Technical Information
Service Manual
(2)Model:GWHD(18)NK3FO(CB228W03500)
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N2
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RT2
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COMP
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V
UV
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2
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N
N1
L'
N'
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E(PE)
N2
3
3
2
L4
L1 L2
L4
L3
M1
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 electrical shock!

16 Technical Information
Service Manual
(4)Model:GWHD(24)NK3GO(CB228W03401)
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 electrical shock!
P
COMP
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W
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2
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L4
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CONNECTOR
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3
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17
Technical Information
Service Manual
(6)Model:GWHD(28) NK3FO(CB228W03601)(CB228W03600)
L3
L4
L4
L4
L2
L1
L4
555
2
3
3
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V
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UCOMP
P
HPS
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AC-L
N2
3
2
L2
XTC
CONNECTOR
XTD
2
3

18 Technical Information
Service Manual
(7)Model:GWHD(36)NK3BO
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