Gree GWHD(14)NK6OO(LC)(LH) Service Manual
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Gree GWHD(14)NK6OO(LC)(LH) Service Manual

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GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI

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Summary of Contents for Gree GWHD(14)NK6OO(LC)(LH)

  • Page 1 Change for life Service Manual GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI...

  • Page 2: Table Of Contents

    Table of Contents Service Manual Part I : Technical Information ............1 1. Summary .......................1 2. Specifications ....................2 3. Outline Dimension Diagram .............30 4. Refrigerant System Diagram ..........32 5. Electrical Part ....................36 5.1 Wiring Diagram .......................36 5.2 PCB Printed Diagram ....................40 6.

  • Page 3: Part I : Technical Information

    1. Summary Service Manual Outdoor Unit: GWHD(14)NK6OO(LC)(LH) GWHD(14)NK6OO(LC) GWHD(21)NK6OO(LC)(LH) GWHD(21)NK6OO(LC) GWHD(18)NK6OO(LC)(LH) GWHD(18)NK6OO(LC) GWHD(24)NK6OO(LC)(LH) GWHD(24)NK6OO(LC) GWHD(28)NK6OO(LC)(LH) GWHD(28)NK6OO(LC) GWHD(36)NK6OO(LC)(LH) GWHD(36)NK6OO(LC) GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) Model list: Model Product code 1 GWHD(14)NK6OO(LC)(LH) CB228W14300 2 GWHD(14)NK6OO(LC) CB228W14301 3 GWHD(18)NK6OO(LC)(LH) CB228W14500 4 GWHD(18)NK6OO(LC) CB228W14501 5 GWHD(21)NK6OO(LC)(LH) CB228W14400 6 GWHD(21)NK6OO(LC) CB228W14401 7 GWHD(24)NK6OO(LC)(LH)

  • Page 4: Specifications

    2. Specifications Service Manual Model GWHD(14)NK6OO(LC)(LH) Product Code CB228W14300 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input Heating Power Input 0.97 Cooling Current Input 4.88 Heating Current Input 4.44 Rated Power Input 2.25 Rated Current 3.73 4.54...
  • Page 5 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 6 2. Specifications Service Manual Model GWHD(14)NK6OO(LC) Product Code CB228W14301 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input Heating Power Input 0.97 Cooling Current Input 4.88 Heating Current Input 4.44 Rated Power Input 2.25 Rated Current 3.73 4.54...
  • Page 7 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 8 2. Specifications Service Manual Model GWHD(18)NK6OO(LC)(LH) Product Code CB228W14500 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity 5.65 Cooling Power Input 1.48 Heating Power Input 1.25 Cooling Current Input 6.56 Heating Current Input 5.55 Rated Power Input Rated Current 3.58 4.52...
  • Page 9 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 10 2. Specifications Service Manual Model GWHD(18)NK6OO(LC) Product Code CB228W14501 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity 5.65 Cooling Power Input 1.48 Heating Power Input 1.25 Cooling Current Input 6.56 Heating Current Input 5.55 Rated Power Input Rated Current 3.58 4.52...
  • Page 11 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 12 2. Specifications Service Manual Model GWHD(21)NK6OO(LC)(LH) Product Code CB228W14400 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input 1.48 Heating Power Input 1.43 Cooling Current Input 6.57 Heating Current Input 6.34 Rated Power Input Rated Current 12.9 4.12...
  • Page 13 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 14 2. Specifications Service Manual Model GWHD(21)NK6OO(LC) Product Code CB228W14401 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input 1.48 Heating Power Input 1.43 Cooling Current Input 6.57 Heating Current Input 6.34 Rated Power Input Rated Current 12.9 4.12...
  • Page 15 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 16 2. Specifications Service Manual Model GWHD(24)NK6OO(LC)(LH) Product Code CB228W14600 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input 1.88 Heating Power Input 2.23 Cooling Current Input 8.34 Heating Current Input 9.89 Rated Power Input Cooling: 3.4 / Heating: 3.0 Rated Current Cooling: 15 / Heating: 14.6...
  • Page 17 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 18 2. Specifications Service Manual Model GWHD(24)NK6OO(LC) Product Code CB228W14601 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input 1.88 Heating Power Input 2.23 Cooling Current Input 8.34 Heating Current Input 9.89 Rated Power Input Cooling: 3.4 / Heating: 3.0 Rated Current Cooling: 15 / Heating: 14.6...
  • Page 19 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 20 2. Specifications Service Manual Model GWHD(28)NK6OO(LC)(LH) Product Code CB228W14800 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input 2.12 Heating Power Input Cooling Current Input 9.41 Heating Current Input 9.76 Rated Power Input Rated Current 15.97 3.77 4.32...
  • Page 21 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 22 2. Specifications Service Manual Model GWHD(28)NK6OO(LC) Product Code CB228W14801 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity Heating Capacity Cooling Power Input 2.12 Heating Power Input Cooling Current Input 9.41 Heating Current Input 9.76 Rated Power Input Rated Current 15.97 3.77 4.32...
  • Page 23 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 24 2. Specifications Service Manual Model GWHD(36)NK6OO(LC)(LH) Product Code CB228W14700 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity 10.6 Heating Capacity Cooling Power Input Heating Power Input 3.04 Cooling Current Input 13.31 Heating Current Input 13.49 Rated Power Input Cooling: 4.6 / Heating: 5.0 Rated Current Cooling: 20.41 / Heating: 21.74...
  • Page 25 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 26 2. Specifications Service Manual Model GWHD(36)NK6OO(LC) Product Code CB228W14701 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity 10.6 Heating Capacity Cooling Power Input Heating Power Input 3.04 Cooling Current Input 13.31 Heating Current Input 13.49 Rated Power Input Cooling: 4.6 / Heating: 5.0 Rated Current Cooling: 20.41 / Heating: 21.74...
  • Page 27 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 28 2. Specifications Service Manual Model GWHD(42)NK6OO(LC)(LH) Product Code CB228W14900 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity 12.1 Heating Capacity Cooling Power Input Heating Power Input 3.19 Cooling Current Input 15.08 Heating Current Input 14.15 Rated Power Input Cooling: 4.6 / Heating: 5.0 Rated Current Cooling: 20.41 / Heating: 21.74...
  • Page 29 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...
  • Page 30 2. Specifications Service Manual Model GWHD(42)NK6OO(LC) Product Code CB228W14901 Rated Voltage 220-240 Power Rated Frequency Supply Phases Cooling Capacity 12.1 Heating Capacity Cooling Power Input Heating Power Input 3.19 Cooling Current Input 15.08 Heating Current Input 14.15 Rated Power Input Cooling: 4.6 / Heating: 5.0 Rated Current Cooling: 20.41 / Heating: 21.74...
  • Page 31 2. Specifications Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe1 inch Outer Diameter of Gas Pipe1 inch Outer Diameter of Liquid Pipe2 inch...

  • Page 32: Outline Dimension Diagram

    3. Outline Dimension Diagram Service Manual GWHD(14)NK6OO(LC)(LH) GWHD(14)NK6OO(LC) GWHD(18)NK6OO(LC)(LH) GWHD(18)NK6OO(LC) Unit:mm GWHD(21)NK6OO(LC)(LH) GWHD(21)NK6OO(LC) GWHD(24)NK6OO(LC)(LH) GWHD(24)NK6OO(LC) GWHD(28)NK6OO(LC)(LH) GWHD(28)NK6OO(LC) Unit:mm Technical Information...
  • Page 33 3. Outline Dimension Diagram Service Manual GWHD(36)NK6OO(LC)(LH) GWHD(36)NK6OO(LC) GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) 1020 Unit:mm Technical Information...

  • Page 34: Refrigerant System Diagram

    4. Refrigerant System Diagram Service Manual GWHD(14)NK6OO(LC)(LH) GWHD(14)NK6OO(LC) GWHD(18)NK6OO(LC)(LH) GWHD(18)NK6OO(LC) outdoor indoor filter outdoor heat exchanger 4-way valve A heat exchanger high pressure switch filter discharge silencer B heat exchanger discharge temperature filter sensor gas -liquid separator A1: A-unit electronic expansion valve B1: B-unit electronic expansion valve A2: A-unit gas pipe temperature sensor B2: B-unit gas pipe temperature sensor...
  • Page 35 4. Refrigerant System Diagram Service Manual GWHD(21)NK6OO(LC)(LH) GWHD(21)NK6OO(LC) GWHD(24)NK6OO(LC)(LH) GWHD(24)NK6OO(LC) outdoor indoor filter A heat exchanger outdoor heat exchanger filter 4-way valve high pressure switch B heat exchanger filter discharge silencer discharge temperature sensor C heat exchanger gas -liquid separator filter A1: A-unit electronic expansion valve B1: B-unit electronic expansion valve...
  • Page 36 4. Refrigerant System Diagram Service Manual GWHD(28)NK6OO(LC)(LH) GWHD(28)NK6OO(LC) GWHD(36)NK6OO(LC)(LH) GWHD(36)NK6OO(LC) outdoor indoor filter A heat exchanger outdoor heat exchanger filter 4-way valve B heat exchanger filter high pressure switch discharge silencer C heat exchanger discharge temperature sensor filter D heat exchanger gas -liquid separator filter A1: A-unit electronic expansion valve...
  • Page 37 4. Refrigerant System Diagram Service Manual GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) outdoor indoor filter A heat exchanger outdoor heat exchanger filter B heat exchanger 4-way valve filter high pressure switch C heat exchanger filter discharge silencer discharge temperature D heat exchanger sensor filter E heat exchanger gas -liquid separator filter...

  • Page 38: Electrical Part

    5. Electrical Part Service Manual 5.1 Wiring Diagram ●Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name White Green COMP Compressor Yellow Brown Grounding wire Blue YEGN Yellow/Green Black Violet Orange ● Outdoor Unit GWHD(14)NK6OO(LC)(LH) GWHD(18)NK6OO(LC)(LH) 600007064503 Technical Information...
  • Page 39 5. Electrical Part Service Manual GWHD(14)NK6OO(LC) GWHD(18)NK6OO(LC) 60000706450301 GWHD(21)NK6OO(LC)(LH) GWHD(21)NK6OO(LC) GWHD(24)NK6OO(LC)(LH) GWHD(24)NK6OO(LC) POWER TERMINAL MAGNETIC RING BLOCK EXHAUST BN(BK) AC-L TEMP. SENSOR OUTROOM T-SENSOR TEMP. SENSOR YEGN YEGN OUTTUBE BU BN TEMP. SENSOR TERMINAL BLOCK MAGNETIC RING 4-WAY N(1) 4WAY VALVE YEGN COMP...
  • Page 40 5. Electrical Part Service Manual GWHD(28)NK6OO(LC)(LH) GWHD(28)NK6OO(LC) POWER MAGNETIC TERMINAL RING EXHAUST BLOCK TEMP. SENSOR BN(BK) AC-L OUTROOM T-SENSOR TEMP. SENSOR YEGN OUTTUBE YEGN TEMP. SENSOR BU BN TERMINAL BLOCK MAGNETIC 4-WAY RING 4WAY N(1) VALVE YEGN COMP BU BN TERMINAL BLOCK N(1) MAGNETIC...
  • Page 41 5. Electrical Part Service Manual GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) MAGNETIC MAGNETIC POWER TERMINAL RING RING BLOCK BN(BK) AC-L L-OUT AC-L Main Board N-OUT HIGH PRESSURE YEGN SWITCH YEGN MAGNETIC RING MAGNETIC TERMINAL BLOCK RING N(1) 4WAY 4-WAY VALVE OPTIONAL ELECTRONIC YEGN EXPANSION VALVE D (yellow) MAGNETIC...

  • Page 42: Pcb Printed Diagram

    5. Electrical Part Service Manual 5.2 PCB Printed Diagram GWHD(14)NK6OO(LC)(LH) GWHD(14)NK6OO(LC) GWHD(18)NK6OO(LC)(LH) GWHD(18)NK6OO(LC) Name Name Terminal of compressor Terminal of outdoor fan Terminal of electronic expansion valve A Terminal of 4-way valve Terminal of gas-liquid valve temperature Sensor A 10 Electric heating terminal of chassis Terminal of gas-liquid valve temperature Sensor B Terminal of live wire Terminal of electronic expansion valve B...
  • Page 43 5. Electrical Part Service Manual GWHD(21)NK6OO(LC)(LH) GWHD(21)NK6OO(LC) GWHD(24)NK6OO(LC)(LH) GWHD(24)NK6OO(LC) GWHD(28)NK6OO(LC)(LH) GWHD(28)NK6OO(LC) 2 3 45678 9 10 11 12 Name Name Terminal of compressor Terminal of electronic expansion valve B Terminal of high pressure protection 12 Terminal of electronic expansion valve A Overload protection terminal of compressor 13 Terminal of outdoor fan Terminal of gas-liquid valve temperature Sensor...
  • Page 44 5. Electrical Part Service Manual GWHD(36)NK6OO(LC)(LH) GWHD(36)NK6OO(LC) GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) Name Name Overload protection terminal of compressor 12 Terminal of communication neutral wire Terminal of E disk 13 Terminal of compressor Terminal of DRED 14 Terminal of outdoor fan Terminal of high pressure protection 15 Terminal of temperature Sensor Terminal of low pressure protection 16 Terminal of liquid valve temperature Sensor...

  • Page 45: Function And Control

    6. Function and Control Service Manual 1 Basic functions of the system When one of the indoor units reaches the heating operation condition, the unit starts heating operation. 1.1 Cooling Mode 1.3.2 Stop in heating operation: 1.1.1 Cooling conditions and process: 1.3.2.1 When all the indoor units reach the stop condition, the If the compressor is in stop status and start the unit for cooling compressor stops and the outdoor fan stops after 1min;...
  • Page 46 6. Function and Control Service Manual mode. and then putting through the power. 2.7 Compressor overload protection b. Fan mode is in conflict with heating mode and the heating mode is the basic mode. No matter which indoor unit operates If the compressor overload switch is detected having movement, first, the unit will run in heating mode.

  • Page 47: Part Ii : Installation And Maintenance

    7. Notes for Installation and Maintenance Service Manual Safety Precautions: Important! the valves are opened before energizing. 13. Check if there is electric leakage on the unit body. If yes, P l e a s e r e a d t h e s a f e t y p r e c a u t i o n s c a r e f u l l y b e f o r e please eliminate the electric leakage.
  • Page 48 7. Notes for Installation and Maintenance Service Manual Safety Precautions for Installing and Relocating the Unit: To ensure safety, please be mindful of the following precautions. WARNINGS 1. When installing or relocating the unit, be sure to 5.When installing the unit, make sure that connection keep the refrigerant circuit free from air or substances pipe is securely connected before the compressor other than the specified refrigerant.
  • Page 49 7. Notes for Installation and Maintenance Service Manual than the minimum room area. Safety Precautions for Refrigerant The minimum room area is shown on the nameplate or following table a. ●To realize the function of the air conditioner unit, a special refrigerant circulates in the system.
  • Page 50 7. Notes for Installation and Maintenance Service Manual ●Make sure that there isn't any naked flame near the outlet of havent finished). the vacuum pump and its well-ventilated. ●Don't overfilling. ●The refrigerant should be recycled into the specialized ●After filling is finished, please do the leakage detection storage tank.
  • Page 51 7. Notes for Installation and Maintenance Service Manual Main Tools for Installation and Maintenance Level meter Measuring tape Screw driver Impact drill Drill head Electric drill Electroprobe Universal meter Inner hexagon Electronic Torque wrench Open-end wrench spanner leakage detector Vacuum pump Pressure meter Pipe pliers Pipe pliers...

  • Page 52: Installation

    8. Installation Service Manual Installation Procedures Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install the support of outdoor unit Install wall-mounting (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor...

  • Page 53: Electrical Connections

    8. Installation Service Manual 8.1 Electrical Connections An all-pole disconnection switch having a contact separation of at least 3mm in all pole should be connected in fixed wiring. 1. Remove the handle at the right side plate of the outdoor unit Wrong wire connection may cause malfunction of some electric (one screw).
  • Page 54 8. Installation Service Manual 28K / 36K To unit A To unit B To unit C To unit D Power cord connecting connecting connecting connecting cable cable cable cable To the power supply brown blue yellow- yellow- yellow- yellow- yellow- (black) blue black...

  • Page 55: Installing The Outdoor Unit

    8. Installation Service Manual 8.2 Installing the Outdoor Unit Use bolts to secure the unit to a flat, solid floor. When mounting the unit on a wall or the roof, make sure the support is firmly secured so that it cannot move in the event of conversion joint Use bolts to secure the unit to a flat, solid floor.

  • Page 56: Installation Dimension Diagram

    8. Installation Service Manual 8.3 Installation Dimension Diagram Use suitable instruments for the refrigerant R32. Do not use any other refrigerant than R32. Do not use mineral oils to clean the unit. 50cm or more The installation must be done by trained and qualified service personnel with reliability according to this manual. Space to the cover 50cm or more...

  • Page 57: Check After Installation

    8. Installation Service Manual 8.4 Check after Installation Check Items Problems Owing to Improper Installation Is the installation reliable? The unit may drop, vibrate or make noises May cause unsatisfactory cooling (heating) Has the gas leakage been checked? effect Is the thermal insulation of the unit May cause condensation and water dropping sufficient? May cause condensation and water dropping...

  • Page 58: Maintenance

    9. Maintenance Service Manual 9.1 Precautions before Performing Inspection or Repair There are high-capacity electrolytic capacitors on the outdoor mainboard. Thus, even the power is cut off, there is high voltage inside the capacitors and it needs more than 20min to reduce the voltage to safety value. Touching the electrolytic capacitor within 20min after cutting the power will cause electric shock.

  • Page 59: Flashing Led Of Indoor/Outdoor Unit And Primary Judgement

    9. Maintenance Service Manual 9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement 1. Requirement of malfunction display When several malfunctions happen at the same time, malfunction codes will be displayed circularly. 2. Malfunction display method (1) Hardware malfunction: it will be displayed immediately, please refer to “Malfunction status sheet”; (2) Operation status: it will be displayed immediately, please refer to “Malfunction status sheet”;...

  • Page 60: Malfunction Checking And Elimination

    9. Maintenance Communication failure with Unit A Communication failure with Unit A Communication failure with Unit B Communication failure with Unit B Service Manual Communication failure with Unit C Communication failure with Unit C Communication failure with Unit D Communication failure with Unit D Unit A freeze protection Unit A freeze protection Viewing malfunction code...
  • Page 61 9. Maintenance Service Manual Energize the unit Please check: 1. if the indoor and outdoor heat exchanges are dirty, if there is obstacle to affect the radiation; 2. if the indoor and outdoor fans are running normally; If the above cases are existed? 3.
  • Page 62 9. Maintenance Service Manual 2. PFC protection malfunction, capacity charging malfunction Main checking points: If the wiring of the induction is connected well and if the induction is broken; If the mainboard is broken; Flow chart: For 14/18K Start Check if power supply is normal Turn on the unit after power supply Power supply is abnormal?
  • Page 63 9. Maintenance Service Manual 3. Compressor desynchronizing malfunction Main checking points: If the pressure of the system is too high; If the eletric expansion valve is working normally or it is broken; If the radiation of the unit is good; Flow chart: The unit appears desynchronizing as soon as energizing and starting...
  • Page 64 9. Maintenance Service Manual Desynchronizing happens during operation Check if fan Replace the fan capacitor Outdoor unit is working? terminal is connected well Improve radiation situation of the unit Unit radiation is good? (such as cleaning Replace the outdoor unit the heat exchanger, improve ventilation Turn on the unit...
  • Page 65 9. Maintenance Service Manual 4. Compressor overload, diacharge protectionmalfunction Main checking points: If the eletric expansion valve is connected well or it is broken; If there is refrigerant leakage; If the overload protector is broken; Flow chart: Start If the overload protector is connected well? Check the resistance between the two ends of the overload protector in ambient temperature, if the resistance is below 1k...
  • Page 66 9. Maintenance Service Manual 5. Start failuremalfunction Main checking points: If the connection wire of the compressor is connected properly; If the stop duration of the compressor is sufficient; If the compressor is broken; If the refrigerant charging amount is too much; Flow chart: Energize and start the unit...
  • Page 67 9. Maintenance Service Manual 6. Temperature sensor malfunction Main checking points: If the temperature sensor is damaged or broken If the terminal of the temperature sensor is loosended or not connected; If the mainboard is broken; Flow chart: Start Check whether the wiring terminal between temperature sensor and controller is loosened or poorly contacted? Insert the temperature...
  • Page 68 9. Maintenance Service Manual 7. DC fan malfunction Main checking points: If the outdoor fan is blocked by foreign objects; The connection wire of DC fan is connected reliably? If it is loose? Flow chart: Start Turn on the unit Check if the after removing the outdoor fan is blocked by...
  • Page 69 9. Maintenance Service Manual 8. Communication malfunction Main checking points: If the connection wire between the indoor unit and outdoor unit is connected well, if the wires inside the unit is connected well; If the indoor mainboard or outdoor main board is broken; Flow chart: Communication malfunction of some indoor units...
  • Page 70 9. Maintenance Service Manual All the indoor units appear communication malfunction De-energize,check if the connection wire of indoor and outdoor unit and the wire of the eletric box is connected correctly Reconnect according to Eliminate the malfunction Connected correctly? the wiring diagram De-energize, check if the connection wire between the outdoor mainboard and the filter board according to the wiring diagram...
  • Page 71 9. Maintenance Service Manual 9. Anti-high temperatureand overload malfunction Main checking points: If the outdoor ambient temperature is within the normal range; If the indoor fan and outdoor fan are running normally; If the indoor and outdoor radiation environment is good; Flow chart: Start It is a normal protection, please...

  • Page 72: Troubleshooting For Normal Malfunction

    9. Maintenance Service Manual 9.4 Troubleshooting for Normal Malfunction 1. Air Conditioner Can't be Started Up Discriminating Method (Air conditioner Possible Causes Troubleshooting Status) Confirm whether its due to power failure. If yes, No power supply, or poor connection After energization, operation indicator isn't wait for power recovery.
  • Page 73 9. Maintenance Service Manual 4. ODU Fan Motor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Wrong wire connection, or poor Check the wiring status according to circuit Connect wires according to wiring diagram to make connection diagram sure all wiring terminals are connected firmly Measure the capacity of fan capacitor with an Capacity of the ODU fan motor is...

  • Page 74: Exploded View And Parts List

    10. Exploded View and Parts List Service Manual GWHD(14)NK6OO(LC)(LH) GWHD(18)NK6OO(LC)(LH) The component is only for rererence; please refer to the actual product. Description Description Description Front Grill Electric Expansion Valve Coil Terminal Board Cabinet Assy Valve Support Assy Terminal Board Support Assy Axial Flow Fan Right Side Plate Electric Box cover...
  • Page 75 10. Exploded View and Parts List Service Manual GWHD(14)NK6OO(LC) GWHD(18)NK6OO(LC) The component is only for rererence; please refer to the actual product. Description Description Description Valve Support Assy Terminal Board Front Grill Cabinet Assy Right Side Plate Terminal Board Support Assy Axial Flow Fan Valve Cover Electric Box cover...
  • Page 76 10. Exploded View and Parts List Service Manual GWHD(21)NK6OO(LC)(LH) GWHD(24)NK6OO(LC)(LH) The component is only for rererence; please refer to the actual product. Description Description Description Valve Support Assy Top Cover Plate Assy Front Grill Cut-off valve Sub-assy Motor Support Sub-Assy Front Panel Axial Flow Fan Cut-off valve Sub-assy...
  • Page 77 10. Exploded View and Parts List Service Manual GWHD(21)NK6OO(LC) GWHD(24)NK6OO(LC) The component is only for rererence; please refer to the actual product. Description Description Description Atmolysis Pipe Sub-assy Clapboard Sub-Assy Front Grill Front Panel Assy Valve Support Sub-assy Top Cover Assy Axial Flow Fan Cut off Valve Sub-Assy(3/8) Motor Support Assy...
  • Page 78 10. Exploded View and Parts List Service Manual GWHD(28)NK6OO(LC)(LH) 11 12 13 14 15 16 17 18 The component is only for rererence; please refer to the actual product. Description Description Description Valve Support Assy Clapboard Sub-assy Front Grill Cut-off valve Sub-assy Top Cover Plate Assy Front Panel Axial Flow Fan...
  • Page 79 10. Exploded View and Parts List Service Manual GWHD(28)NK6OO(LC) The component is only for rererence; please refer to the actual product. Description Description Description Valve Support Assy Clapboard Assy Front Grill Valve Cover Coping Front Panel Axial Flow Fan Tube Connector Sub-assy Motor Support Brushless DC Motor Handle...
  • Page 80 10. Exploded View and Parts List Service Manual GWHD(36)NK6OO(LC)(LH) GWHD(36)NK6OO(LC) The component is only for rererence; please refer to the actual product. Description Description Description Wire Clamp Electronic Expansion Valve assy Left Side Plate Condenser Assy 4-Way Valve Assy Handle Brushless DC Motor Gas-liquid Separator Assy Compressor and Fittings...
  • Page 81 10. Exploded View and Parts List Service Manual GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) The component is only for rererence; please refer to the actual product. Description Description Description Wire Clamp Electronic Expansion Valve assy Left Side Plate Condenser Assy 4-Way Valve Assy Handle Brushless DC Motor Gas-liquid Separator Assy Compressor and Fittings...

  • Page 82: Removal Procedure

    11. Removal Procedure Service Manual GWHD(14)NK6OO(LC)(LH) GWHD(14)NK6OO(LC) Warning: Be sure to wait for a minimum GWHD(18)NK6OO(LC)(LH) GWHD(18)NK6OO(LC) of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2.
  • Page 83 11. Removal Procedure Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
  • Page 84 11. Removal Procedure Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
  • Page 85 11. Removal Procedure Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
  • Page 86 11. Removal Procedure Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Remove screws fixing the electricbox; loosen the wire bundle; pull out the wiring terminals and then pull electric box upwards to remove it. 14. Remove valve support sub-assy and expansion valve assy Expansion valve assy Remove the screw connecting the valve support and...
  • Page 87 11. Removal Procedure Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
  • Page 88 11. Removal Procedure Service Manual GWHD(21)NK6OO(LC)(LH) GWHD(21)NK6OO(LC) Warning: Be sure to wait for a minimum GWHD(24)NK6OO(LC)(LH) GWHD(24)NK6OO(LC) of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2.
  • Page 89 11. Removal Procedure Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
  • Page 90 11. Removal Procedure Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
  • Page 91 11. Removal Procedure Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
  • Page 92 11. Removal Procedure Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Remove screws fixing the electricbox; loosen the wire bundle; pull out the wiring terminals and then pull electric box upwards to remove it. 14. Remove valve support sub-assy and expansion valve assy Expansion valve assy Remove the screw connecting the valve support and...
  • Page 93 11. Removal Procedure Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
  • Page 94 11. Removal Procedure Service Manual GWHD(28)NK6OO(LC)(LH) GWHD(28)NK6OO(LC) Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. Step Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove valve cover Remove the connection screw fixing the valve cover and then remove the valve cover.
  • Page 95 11. Removal Procedure Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
  • Page 96 11. Removal Procedure Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
  • Page 97 11. Removal Procedure Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
  • Page 98 11. Removal Procedure Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Remove screws fixing the electricbox; loosen the wire bundle; pull out the wiring terminals and then pull electric box upwards to remove it. 14. Remove valve support sub-assy and expansion valve assy Expansion valve assy Remove the screw connecting the valve support and...
  • Page 99 11. Removal Procedure Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.
  • Page 100 11. Removal Procedure Service Manual GWHD(36)NK6OO(LC)(LH) GWHD(36)NK6OO(LC) Warning: Be sure to wait for a minimum GWHD(42)NK6OO(LC)(LH) GWHD(42)NK6OO(LC) of 20 minutes after turning off all power supplies and discharge the refrigerant NOTE: Take 42K model for example. completely before removal. Step Procedure 1.
  • Page 101 11. Removal Procedure Service Manual Step Procedure 4. Remove top panel Top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
  • Page 102 11. Removal Procedure Service Manual Step Procedure 7. Remove right side plate Right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
  • Page 103 11. Removal Procedure Service Manual Step Procedure 10. Remove axial flow blade Axial flow blade Remove the nut on the blade and then remove the axial flow blade. 11. Remove motor and motor support Motor support Motor Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
  • Page 104 11. Removal Procedure Service Manual Step Procedure 13. Remove 4-way valve assy 4-way valve assy Remove screws fixing the electricbox; loosen the wire bundle; pull out the wiring terminals and then pull electric box upwards to remove it. 14. Remove valve support sub-assy and expansion valve assy Expansion valve assy Remove the screw connecting the valve support and...
  • Page 105 11. Removal Procedure Service Manual Step Procedure 16. Remove compressor Compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Condenser assy Support Remove the screws fixing the condenser support and then remove the condenser support. Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.

  • Page 106: Appendix

    Appendix Service Manual Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit display Fahrenheit Celsius Fahrenheit display Fahrenheit Celsius Fahrenheit display Fahrenheit Celsius temperature（℉） temperature（℉） temperature（℉） （℉） （℃） （℉） （℃）...

  • Page 107: Appendix 2: Pipe Expanding Method

    Appendix Service Manual Appendix 2: Pipe Expanding Method Pipe Note: Improper pipe expanding is the main cause of refrigerant leakage.Please expand Pipe cutter the pipe according to the following steps: A:Cut the pip Leaning Uneven Burr ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●...

  • Page 108: Appendix 3: List Of Resistance For Temperature Sensor

    Appendix Service Manual Appendix 3: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579 1.009 16.39...
  • Page 109 Appendix Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443 1.269 137.2 4.289...
  • Page 110 Appendix Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35 15.17 4.08 580.6 73.83...
  • Page 111 JF00304623 GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI Add: West Jinji Rd, Qianshan, Zhuhai,Guangdong, China, 519070 Tel: (+86-756) 8522219 Fax: (+86-756) 8669426 E-mail: global@cn.gree.com For product improvement, specifications and appearance in this manual are subject to change without prior notice.

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