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