Gree GWHD(18)NK3FO User manual

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

Service Manual
Table of Contents
Part Ⅰ : Technical Information ..............................................................................1
1. Summary ..............................................................................................................................1
2. Specications ..................................................................................................................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 .............................................................................................................19
6. Function and Control ..............................................................................................23
Part Ⅱ: Installation and Maintenance .........................................................28
7. Notes for Installation and Maintenance ..................................................28
8. Installation Manual ....................................................................................................30
8.1 Electrical Connections ............................................................................................................31
8.2 Installing the Outdoor Unit ......................................................................................................34
8.3 Installation Dimension Diagram ..............................................................................................35
8.4 Check after Installation ...........................................................................................................36
9. Maintenance ....................................................................................................................46
9.1 Precautions before Performing Inspection or Repair .............................................................46
9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement .............................................47
9.3 Malfunction Checking and Elimination ...................................................................................48
9.4 Maintenance Method for Normal Malfunction .........................................................................72
10. Exploded View and Parts’ List .....................................................................74
11. Removal Procedure ...............................................................................................85
Appendix: ..............................................................................................................................105
Appendix 1: Reference Sheet of Celsius and Fahrenheit ..........................................................105
Appendix 2: Conguration of Connection Pipe ...........................................................................105
Appendix 3: Pipe Expanding Method .........................................................................................106
Appendix 4: List of Resistance for Ambient Temperature Sensor ..............................................107

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)NK3AOGWHD(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 (W/H/D) mm 963X700X396
Dimension of Package (L/W/H) mm 1026X455X735
Dimension of Package(L/W/H) 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 mm2 2.50
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 15
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 20

4Technical Information
Service Manual
Model GWHD(24)NK3FO GWHD(24)NK3GO
Product Code CB228W03301 CB228W03401
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 (W/H/D) mm 1001X790X427 1001X790X427
Dimension of Package (L/W/H) mm 1080X485X840 1080X485X840
Dimension of Package(L/W/H) 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 mm2 2.50 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 15 15
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 10 10
Max. equivalent connection pipe length(outdoor to
last indoor) m 20 20
Connection Pipe Max. Length Distance(total lenght) m 20 20

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 (W/H/D) mm 1001X790X427
Dimension of Package (L/W/H) mm 1080X485X840
Dimension of Package(L/W/H) 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 mm2 2.50
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 15
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 20
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
Product Code CN860W0130 CN860W0020
Power
supply
Rated Voltage V~ 220-240V 220-240V
Rated Frequency Hz 50 50
Phases 1 1
Cooling capacity(max~min) W 10500(2100~11000) 12100(2100~13600)
Heating capacity(max~min) W 12000(2600~13000) 13000(2600~14000)
Cooling Power Input W 3500 3590
Heating Power Input W 3750 3550
Cooling Current Input A 15.42 16.43
Heating Current Input A 15.20 16.22
Rated Power Input W 4880 5300
Rated Current A 21.65 23.50
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
Compressor Model QXAS-D32zX090A TNB306FPGMC
Compressor Refrigerant Oil Type RB68ER PVE(PV50S)
Compressor Type Inverter Rotary Inverter Rotary
L.R.A A / /
Compressor Rated Load Amp (RLA) A 14 13.5
Compressor Power Input W 3300 3010
Compressor Thermal Protector internal internal
Throttling Method Electron expansion valve Electron expansion valve
Cooling Operation Ambient Temperature Range OC -15~48 -15~48
Heating Operation Ambient Temperature Range OC -15~27 -15~27
Condenser Material Copper tube-Aluminum n Copper tube-Aluminum n
Condenser Pipe Diameter mm Φ7.94 Φ7.94
Rows-Fin Gap(mm) mm 2-1.4 2-1.4
Coil length (l) X height (H) X coil width (L) mm 1009.4X38.1X1056 1009.4X38.1X1056
Fan Motor Speed (rpm) (H/M/L) rpm 820 840
Output of Fan Motor W 170 140
Fan Motor RLA A / /
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit m3/h 5200 5500
Fan Type-Piece Axial-ow Axial-ow
Fan Diameter mm Φ570-152 Φ570-152
Defrosting Method Automatic Defrosting Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
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 (W/H/D) mm 1015X440X1103 1015X440X1103
Dimension of Package (L/W/H) mm 1155X490X1220 1155X490X1220
Dimension of Package(L/W/H) mm 1158X493X1235 1158X493X1235
Net Weight kg 94 102
Gross Weight kg 104 112
efrigerant Charge R410A R410A
Refrigerant Charge kg 4.3 4.8