Related Manuals for Gree GWHD14NK3BO
Summary of Contents for Gree GWHD14NK3BO
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Page 1: Service Manual
Change for Life Service Manual MODEL: GWHD(14)NK3BO GWHD(18)NK3DO GWHD(24)NK3DO GWHD(24)NK3EO GWHD(28)NK3BO GWHD(36)NK3AO GWHD(42)NK3AO (Refrigerant R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI... -
Page 2: Table Of Contents
Table of Contents Table of Contents Summary and Features ..................1 1. Safety Precautions ..................2 ..................... 3 3. Construction Views ..................7 4. Refrigerant System Diagram ..............9 5. Schematic Diagram ..................11 5.1 Electrical Data ......................11 5.2 Electrical Wiring......................11 5.3 Printed Circuit Board .................... -
Page 3: Summary And Features
Summary and Features Summary and Features GWHD(24)NK3DO GWHD(24)NK3EO GWHD(28)NK3BO GWHD(14)NK3BO GWHD(18)NK3DO GWHD(42)NK3AO GWHD(36)NK3AO... -
Page 4: Safety Precautions
Safety Precautions 1. Safety Precautions Installing, starting up, and servicing air conditioner can be Make sure the outdoor unit is installed on a stable, level hazardous due to system pressure, electrical components, surface with no accumulation of snow, leaves, or trash and equipment location, etc. - Page 5 Model GWHD(14)NK3BO GWHD(18)NK3DO Product Code CB228W0120 CB228W0080 Compressor Manufacturer/trademark Shenyang SANYO Shenyang SANYO Compressor Model C-6RZ146H1A C-6RZ146H1A Compressor Oil FV50S FV50S Compressor Type Rotary Rotary L.R.A. (A) Compressor RLA(A) 4.54 4.54 Compressor Power Input(W) 1000 1000 Overload Protector 1NT11L-3979 1NT11L-3979 Throttling Method Electronic Expansion Valve Electronic Expansion Valve...
- Page 6 Model of Outdoor Unit GWHD(14)NK3BO GWHD(18)NK3DO Product Code CB228W0121 CB228W0081 MITSUBISHI ELECTRIC (GUANGZHOU)COMPRESSOR CO. LTD Compressor Manufacturer/trademark MITSUBISHI ELECTRIC Compressor Model SNB130FGYMC SNB130FGYMC Compressor Oil FV50S FV50S Compressor Type Rotary Rotary L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 1245 1245 Overload Protector 1NT11L-6578 1NT11L-6578...
- Page 7 Model GWHD(24)NK3DO GWHD(24)NK3EO GWHD(28)NK3BO CB228W0070 CB228W0100 CB228W0110 Product Code CB228W0071 CB228W0101 CB228W0111 Compressor Manufacturer/trademark MITSUBISHI ELECTRIC (GUANGZHOU)COMPRESSOR CO. LTD Compressor Model TNB220FLHMC TNB220FLHMC TNB220FLHMC Compressor Oil FV50S FV50S FV50S Compressor Type Rotary Rotary Rotary L.R.A. (A) Compressor RLA(A) Compressor Power Input(W) 2200 2200 2200...
- Page 8 Model of Outdoor Unit GWHD(36)NK3AO GWHD(42)NK3AO Product Code CN860W0011 CN860W0020 MITSUBISHI ELECTRIC (GUANGZHOU)COMPRESSOR CO. LTD Compressor Manufacturer/trademark MITSUBISHI ELECTRIC Compressor Model TNB220FLHMC TNB306FPGMC Compressor Oil FV50S FV50S Compressor Type Rotary Rotary L.R.A. (A) Compressor RLA(A) 13.5 Compressor Power Input(W) 2200 3010 Overload Protector CS-7C-1595...
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Page 9: Construction Views
Construction Views 3. Construction Views (1)Models:GWHD(14)NK3BO,GWHD(18)NK3DO Unit:mm (2)Models:GWHD(24)NK3DO,GWHD(24)NK3EO,GWHD(28)NK3BO Unit:mm... - Page 10 Construction Views (3)Model:GWHD(36)NK3AO 1022 Unit:mm (4)Model:GWHD(42)NK3AO 1015 1087 Unit:mm...
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Page 11: Refrigerant System Diagram
Refrigerant System Diagram 4. Refrigerant System Diagram Models:GWHD(14)NK3BO,GWHD(18)NK3DO,GWHD(24)NK3DO,GWHD(24)NK3EO,GWHD(28)NK3BO outdoor indoor filter A heat exchanger filter outdoor heat exchanger 4-way valve B heat exchanger filter high pressure switch Note: Not available for 14K/18K model discharge silencer C heat exchanger discharge temperature sensor filter D heat exchanger... - Page 12 Refrigerant System Diagram Models:GWHD(36)NK3AO,GWHD(42)NK3AO Heat Exchanger Liquid Receiver Four-way Valve Capillary Oil Separator Outdoor Unit Stop Valve Compressor Gas/Liquid Separator Electronic Expansion Valve Heating Cooling Indoor Unit Heat Exchanger Heat Exchanger Heat Exchanger Heat Exchanger Heat Exchanger 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 exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into refrigerant liquid.
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Page 13: Electrical Data
Schematic Diagram 5. Schematic Diagram 5.1 Electrical Data Meaning of marks Symbol Color symbol Symbol Color symbol Symbol Parts name WHITE GREEN OVERLOAD COMP YELLOW BROWN COMPRESSOR BLUE PROTECTIVE EARTH YEGN YELLOW GREEN BLACK VIOLET ORANGE 5.2 Electrical Wiring (1)Models:GWHD(14)NK3BO,GWHD(18)NK3DO TERMINAL POWER BLOCK... -
Page 14: Schematic Diagram
Schematic Diagram (2)Model:GWHD(24)NK3DO 11BN POWER 21BN AC-L1 EXHAUST 22BU YEGN TEM.SENSOR FILTER AC-L2 10BU AC-L 9YEGN OUTROOM T-SENSOR TEM.SENSOR E(PE) OUTTUBE N(1) 12YEGN TEM.SENSOR YEGN COM-INNER N(1) 20YE YEGN 19BU 18WH LX2-2 OVC-COMP 17WH 13BU LX2-1 LX1-1 LX1-2 14YE COMP. AP1: Main Board 15RD TUBE-A... - Page 15 Schematic Diagram (4)Model:GWHD(28)NK3BO POWER 21BN 11BN AC-L1 EXHAUST 10BU 22BU TEM.SENSOR FILTER AC-L2 YEGN AC-L OUTROOM 9YEGN T-SENSOR E(PE) TEM.SENSOR N(1) OUTTUBE 12YEGN TEM.SENSOR YEGN N(1) COM-INNER YEGN 20YE N(1) 19BU 18WH YEGN OVC-COMP 17WH N(1) LX2-2 13BU LX2-1 YEGN LX1-1 LX1-2 COMP.
- Page 16 Schematic Diagram (5)Model:GWHD(36)NK3AO INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C INDOOR UNIT D...
- Page 17 Schematic Diagram (6)Model:GWHD(42)NK3AO...
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Page 18: Printed Circuit Board
Schematic Diagram 5.3 Printed Circuit Board (1)Models:GWHD(14)NK3BO,GWHD(18)NK3DO Compressor interface Unit A liquid valve and gas valve Unit B liquid valve and gas valve Compressor overload protector 5 Temperature sensor Compressor electric heater 7 Outdoor fan 8 4-way valve Chassis electric heater (reserved) Unit A electronic expansion valve... - Page 19 Schematic Diagram (2)Models:GWHD(24)NK3DO(CB228W0070),GWHD(24)NK3EO(CB228W0100),GWHD(28)NK3BO(CB228W0110) 1 Compressor interface Temperature sensor interface of unit A liquid valve and gas valve Temperature sensor interface of unit B liquid valve and gas valve Temperature sensor interface of unit C liquid valve and gas valve Temperature sensor interface of unit D liquid valve and gas valve Temperature sensor...
- Page 20 Schematic Diagram (3)Models:GWHD(24)NK3DO(CB228W0071),GWHD(24)NK3EO(CB228W0101),GWHD(28)NK3BO(CB228W0111) 1 Interface of compressor Interface of temperature sensor Overload interface of compressor Interface of electric heating tape for chassis Interface of electric heating tape for compressor 6 Interface of outdoor unit 7 Interface of 4-way valve Interface of high-pressure protection Interface of temperature sensor for liquid valve...
- Page 21 Schematic Diagram (4)Models:GWHD(36)NK3AO,GWHD(42)NK3AO FA-FE: Teminals of EXV(Electronic expansion Valve) JUMP2:the code of capcity SA1: Master select switch T-SENSOR2:Teminals of temperature sensor TUBE-A - TUBE- temperature sensor OVC-COMP:Teminals of overload protector LPP:Teminals of low pressure switch HPP:Teminals of high pressure switch 4V1:Teminals of 4-way valve COM:Teminals of...
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Page 22: Description Of Each Control Operation
Function and Control 6. Description of Each Control Operation (1)Models:14K,18K,24K,28K 1 Basic functions of the system 1.1 Cooling Mode 1.1.1 Cooling conditions and process: If the compressor is in stop status and start the unit for cooling operation, when one of the indoor units reaches the cooling operation condition, the unit start cooling operation;... -
Page 23: Fan Mode
Function and Control 1.3.3 Outdoor fan control in heating mode The outdoor fan starts before 5s of the starting of compressor and then it will run in high speed for 40s; The fan shall run at every speed for at least 80s; When the compressor stops, the outdoor fan stops after 1min. -
Page 24: Overcurrent Protection
Function and Control 2.4 Communication malfunction Detection of the quantity of installed indoor units: After 3min of energizing, if the outdoor unit does not receive the communication data of certain indoor unit, the outdoor unit will judge that indoor unit is not installed and will treat it as it is not installed. If the outdoor unit receives the communication data of that indoor unit later, the outdoor unit will treat that unit as it is installed. -
Page 25: Control Function Of Outdoor Unit
Function and Control (2)Models:36K,42K 1.Control Function of Outdoor Unit 1.1 Cooling Mode a. Cooling conditions and process: If the compressor is in stop status and start the unit for cooling operation, when one of the indoor units reaches the cooling operation condition, the unit start cooling operation;... - Page 26 Function and Control The compressor, the outdoor fan and the 4-way valve are closed; temperature setting range is 16 ~30 2.Protection Function 2.2 Overload Protection Function high, the compressor protection stops running. If the discharge temperature protection continuously appears for 6 times, the compressor can’t resume running.
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Page 27: Other Function
Function and Control through the power. 3.other function Refrigerant Recovery How to quit the refrigerant recovery: When the refrigerant recovery has started, it will quit when there is a signal from the wireless controller or it has run for ten minutes. -
Page 28: Electrical Connections
Installation Manual 7. Installation Manual GWHD(14)NK3BO,GWHD(18)NK3DO: 7.1 Electrical Connections Handle (1)GWHD(14)NK3BO,GWHD(18)NK3DO,GWHD(24)NK3DO: Remove the handle at the right side plate of the outdoor unit (one screw). Front Panel valve cover Remove the cable clamp, connect the power connection To unit B To unit A cable with the terminal at the row of connection and the connection. - Page 29 Installation Manual （2）GWHD(24)NK3EO: 1 Remove the valve cover at the right side plate of the An all-pole disconnection switch having a contact outdoor unit (one screw). separation of at least 3mm in all pole should be connected in fixed wiring. Remove the cable clamp, connect the power connection cable with the terminal at the row of connection and fix Wrong wire connection may cause malfunction of...
- Page 30 Installation Manual (3）GWHD(28)NK3BO: 1 Remove the valve cover at the right side plate of the An all-pole disconnection switch having a contact outdoor unit (one screw). separation of at least 3mm in all pole should be Remove the cable clamp, connect the power connection connected in fixed wiring.
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Page 31: Installing The Outdoor Unit
Installation Manual 7.2 Installing the Outdoor Unit Use bolts to secure the unit to a flat, solid floor. Install the drain fitting and the drain hose(for When mounting the unit on a wall or the roof, make model with heat pump only) sure the support is firmly secured so that it cannot Condensation is produced and flows from the outdoor unit move in the event of intense vibrations or a strong... -
Page 32: Installation Dimension Diagram
Installation Manual 7.3 Installation Dimension Diagram Use suitable instruments for the refrigerant R410A. Do not use any other refrigerant than R410A. Do not use mineral oils to clean the unit. The installation must be done by trained and qualified service personnel with reliability according to this manual. -
Page 33: Check After Installation
Installation Manual 7.4 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 34: Models:36K And 42K
Installation Manual 7.5 Models:36K and 42K Safety Precautions Please read this manual carefully before using and operating correctly as instructed in this manual. Warning! It indicates improper operation which will lead to human casualty or severe injury. Caution! It indicates improper operation which will lead to injury or property damage. Warning! in a place Please install the unit... - Page 35 . Besides, the installation of the outdoor unit should not affect the heat radiation of the unit. CAUTION personnel at the GREE appointed service center. where is full of oil; alkaline soil off the sea; where there is sulfur gas like sulfur hot spring ;...
- Page 36 Installation Manual Recommended Cord Capacity of the Models Power Supply pieces× Air Switch sectional area GWHD(36)NK3AO 220-240V~ 50Hz ×3 GWHD(42)NK3AO 220-240V~ 50Hz ×3 Earthing Requirements the tapping screw; otherwise it would cause the hazard of electric shock. Running water pipe; Coal gas pipe;...
- Page 37 Installation Manual Noise Precautions surroundings. or increase the working noise. Accessories for Installation Refer to the packing list for the accessories of the indoor and outdoor units respectively. 7.5.2 Installation of the Outdoor Unit Precautions for the Installation of the Outdoor Unit enough.
- Page 38 Installation Manual ＞1000 ＞500 ＞2000 ＞500 ＞2000 Fig.5 7.5.3 Connection between Indoor and Outdoor Units Wiring of the Power Cord CAUTION 1) Open the side plate. “N(1),2,3” of the indoor unit to those of the outdoor unit correspondingly. 4) Fix the power cord with wire clips. Energy Level and Capacity Code of the Indoor and Outdoor Units Energy Level Capacity Code...
- Page 39 Installation Manual Refrigerant Pipe Total Length(m) Max. Length for Single Unit(m) Outdoor unit Max. and indoor unit installation Indoor unit altitude and indoor unit Capacity Level of the Indoor Unit Gas Pipe Liquid Pipe 09,12 21,24 1) Refer to Fig.6 for the moments of torque for tightening screws. Flare Nut Pipe Pipe...
- Page 40 Installation Manual CAUTION! otherwise the capillary pipe or other pipe may crack, which then would result in leakage. CAUTION! piping. e. Installation of the Protection Layer of the Refrigerant Pipe and water leakage. indoor unit, as shown in Fig.7. No gap Fig.7 CAUTION! f.
- Page 41 Installation Manual 4) When the compressor is not running, charge the R410A refrigerant into the refrigerant pipe from the liquid valve of the outdoor unit (do not do it from the gas valve). Calculation of the Additional Refrigerant Charging Model GWHD(36)NK3AO GWHD(42NK3AO Refrigerant Charge (kg)
- Page 42 Installation Manual 4) Additional Refrigerant Charge Record Indoor Unit Model Additional Refrigerant Charge(kg) …… Total Diameter Total Length(m) Additional Refrigerant Charge(kg) Total Check Results installed securely? noise. Does the drainage go well? Is the actual power voltage in line with the value marked on the nameplate? Are the wiring and the piping correct? Does the wire meet the regulated requirement?
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Page 43: Exploded Views And Parts List
Exploded Views and Parts List 8. Exploded Views and Parts List (1) Models:GWHD(14)NK3BO,GWHD(18)NK3DO... - Page 44 Exploded Views and Parts List Part Code Description GWHD(14)NK3BO GWHD(18)NK3DO Product Code CB228W0120 CB228W0080 Front Grill 22413015 22413015 01433034P 01433034P 01205161P 01205161P Drainage Joint 26113009 26113009 Compressor Gasket 76710236 76710236 00103501 00103501 Magnet Coil 4300040033 4300040033 4-way Valve Assy 03123438 03123438 Temperature Sensor 3900007301...
- Page 45 Exploded Views and Parts List Part Code Description GWHD(14)NK3BO GWHD(18)NK3DO Product Code CB228W0121 CB228W0081 Front Grill 22413015 22413015 01433034P 01433034P 01205168P 01205168P Drainage Joint 26113009 26113009 76815215 76815215 00205262 00205262 Magnet Coil 4300040033 4300040033 4-Way Valve Assy 04144312 04144312 Temperature Sensor 3900007301 3900007301 Temperature Sensor...
- Page 46 Exploded Views and Parts List (2) Model:GWHD(24)NK3DO(CB228W0070)
- Page 47 Exploded Views and Parts List Part Code Description GWHD(24)NK3DO Product Code CB228W0070 Front grill 22415002 Front Panel 01535008P Drainage Plug 06813401 01203942P Drainage Connecter 06123401 00105036 Compressor Gasket 76710207 Gas-liquid Separator Assy 07225017 03723455 Right Side Plate 01303194P 0171312802P Cut-off Valve 07130239 Cut-off Valve 071302391...
- Page 48 Exploded Views and Parts List (3) Model:GWHD(24)NK3DO(CB228W0071)
- Page 49 Exploded Views and Parts List Part Code Description GWHD(24)NK3DO Product code CB228W0071 Front grill 22415002 Front Panel 01535008P Drainage Plug 06813401 01203942P Drainage Connecter 06123401 00105036 Compressor Gasket 76710207 Gas-liquid Separator Assy 07225017 03723455 Right Side Plate 01303194P 0171312802P Cut-off Valve 07130239 Cut-off Valve 071302391...
- Page 50 Exploded Views and Parts List (4) Model:GWHD(24)NK3EO(CB228W0100)
- Page 51 Exploded Views and Parts List Part Code Description GWHD(24)NK3EO Product Code CB228W0100 Front grill 22415002 Front Panel 01535008P Drainage Plug 06813401 01203942P Drainage Connecter 06123401 00105036 Compressor Gasket 76710207 Gas-liquid Separator Assy 07225017 03723455 Right Side Plate 01303194P Valve support assy 0710306601 Cut-off Valve 071302391...
- Page 52 Exploded Views and Parts List (5) Model:GWHD(24)NK3EO(CB228W0101)
- Page 53 Exploded Views and Parts List Part Code Description GWHD(24)NK3EO Product code CB228W0101 Front grill 22415002 Front Panel 01535008P Drainage Plug 06813401 01203942P Drainage Connecter 06123401 00105036 Compressor Gasket 76710207 Gas-liquid Separator Assy 07225017 03723455 Right Side Plate 01303194P Valve support assy 0710306601 Cut-off Valve 071302391...
- Page 54 Exploded Views and Parts List (6) Model:GWHD(28)NK3BO(CB228W0110)
- Page 55 Exploded Views and Parts List Part Code Description GWHD(28)NK3BO Product Code CB228W0110 Front grill 22415002 Front Panel 01535008P Drainage Plug 06813401 01203942P Drainage Connecter 06123401 00105036 Compressor Gasket 76710207 Gas-liquid Separator Assy 07225017 03723455 Right Side Plate 01303194P Valve support assy 07103066 Cut-off Valve 071302391...
- Page 56 Exploded Views and Parts List (7) Model:GWHD(28)NK3BO(CB228W0111)
- Page 57 Exploded Views and Parts List Part Code Description GWHD(28)NK3BO Product code CB228W0111 Front grill 22415002 Front Panel 01535008P Drainage Plug 06813401 01203942P Drainage Connecter 06123401 00105036 Compressor Gasket 76710207 Gas-liquid Separator Assy 07225017 03723455 Right Side Plate 01303194P Valve support assy 07103066 Cut-off Valve 071302391...
- Page 58 Exploded Views and Parts List (8) Model:GWHD(36)NK3AO(CN860W0011)
- Page 59 Exploded Views and Parts List Part Code Description GWHD(36)NK3AO Product code CN860W0011 Front Grill 01473001 01433011 Front Side Plate 01305247 Axial Flow Fan 10335253 Fan Motor 1501350202 Drainage Plug 06813401 01194310P Pressure Protect Switch 4602001555 Oil Separator 07424118 00105036 Handle 26235253 Right Side Plate 01314320...
- Page 60 Exploded Views and Parts List (9) Model:GWHD(42)NK3AO(CN860W0020)
- Page 61 Exploded Views and Parts List Part Code Description GWHD(42)NK3AO Product code CN860W0020 Front Grill 22415005 01435007P 01305508 39008066 01194141P 20113003 Pressure Protect Switch 4602000902 01324238 00205230 Connection Pipe 05034302 07225018 Bidirection Accumulator 07228741 05034290 01314304 StrainerA 07210022 Cut-off Valve 07334403 Cut-off Valve 07334402 StrainerA...
- Page 62 Exploded Views and Parts List Terminal Board 42010270 Electric Box Assy 02404113 01805402 Left Side Plate 01305064P Condenser support plate 01895309 01244141 Fan Motor 1570522801 Axial Flow Fan 10335010...
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Page 63: Malfunction Indicator
Troubleshooting 9. Troubleshooting 9.1 Malfunction Indicator ○ ● Note: : off : on : blink When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is displayed for 5s. Malfunction description LED1 LED2 LED3 LED4 ○... -
Page 64: Malfunction Checking And Elimination
Troubleshooting ● ● ● Communication failure with Unit A ● ● Communication failure with Unit B ○ ○ ● Communication failure with Unit C ● ○ ● Communication failure with Unit D ○ ● Unit A freeze protection ○ ● ●... - Page 65 Troubleshooting 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 If the above cases are existed? normally; 3.
- Page 66 Troubleshooting (2) PFC protection malfunction Main checking points: If the power supply is normal; Check if the connection wire of induction is connected well and if the induction is broken; Flow chart: Start Check If the power supply is normal Turn on the unit after the power supply resumes to Power supply is abnormal...
- Page 67 Troubleshooting (3) 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: Energize the unit and wait for 1min Testthevoltage between thetwo ends of the electrolytic capacitor with the DC shift of the universal meter...
- Page 68 Troubleshooting (4) Anti-high temperature and overload malfunction Main checking points: If the outdoor ambient temperature is within the normal range; If the outdoor fan is running normally; If the indoor and outdoor radiation environment is good; Flow chart: Start It is a normal protection, please If the outdoor ambient temperature operate the unit after the outdoor is above 53...
- Page 69 Troubleshooting (5) 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 70 Troubleshooting (6) Start failure malfunction 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 71 Troubleshooting (7) 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 72 Troubleshooting All the indoor units appear communication malfunction De-energize,check 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 Reconnect according to...
- Page 73 Troubleshooting (8) Compressor overload, diacharge protection malfunction 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 74 Troubleshooting (9) 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 The stop duration of the compressor is longer than 3min?
- Page 75 Troubleshooting 9.3 Models:36K and 42K 1. Trouble Table WARNING! 1.1 Check before Contacting Service Center Conditions Causes Corrective Actions Power off Restart the unit when power on Loosened power supply plug. Plug the power supply properly. The unit does not run of the remote controller Remoter controller out Keep the control distance within 8 meters.
- Page 76 Troubleshooting 1.3 Error Description Error & Status Display List Indoor Unit Indoor Wired (Floor/ and/or Indicating LED Flashing Times Outdoor Controler Ceiling) Outdoor Errors of Commercial Unit 88 Display Heating 88 Display Unit Error Running LED Cooling LED Air Conditioners Display Defrosting Mode 1 Outdoor...
- Page 77 Troubleshooting AC Current Protection Flash 3 times Flash 3 times Flash 3 times Outdoor (Input Side) Temp Drift Protection Flash 3 times Flash 3 times Flash 3 times Outdoor Drive Board Ambient Flash 3 times Flash 3 times Flash 3 times Outdoor Temp Sensor Error Low Voltage Protection...
- Page 78 Troubleshooting Table 2 Error Code Error Description Error Code Error Description Error Code Error Description Unit A indoor unit pipe outlet Unit B indoor unit pipe outlet Unit C indoor unit pipe outlet temperature sensor error temperature sensor error temperature sensor error Unit A indoor pipe inlet Unit B indoor pipe inlet Unit C indoor pipe inlet...
- Page 79 Troubleshooting 2. Flow Chart of Troubleshooing solve the faulted parts. Find the malfunction reason carefully as unit may occur several malfunction at the same time and one malfunction Malfunction display: E1 Compressor High Pressure Protection High pressure protection Replace the outdoor Check if the pressure is really high pressure with the Check if pressure switch unit mainboard...
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Page 80: Troubleshooting
Troubleshooting Malfunction display: E3 Compressor Low Pressure Protection Compressor Low Pressure Protection Check if the pressure is really low pressure Refer to the high pressure with the measurement of a manometer protection Charge refrigerant according to the amount Check if the refrigerant in the specified in the nameplate and calculated system is sufficient additional amount... - Page 81 Troubleshooting Malfunction display: E4 Compressor Exhaust High Temperature Protection Discharge temperature protection Measure if temperature sensor’s Measure if compressor’s discharge Replace relevant discharge resistance value is correct temperature has reached 115℃ temperature sensor System pipeline leaks so complementation is needed. Replace the outdoor Please add refrigerant according to the amount unit mainboard...
- Page 82 Troubleshooting Malfunction display: E9 Full Water Protection Full Water Protection Check if the voltage of liquid Check if water overflow Replace the main board of level switch end is ok the indoor uint Check the liquid level switch Check if the water drainage Replace the main board of Check if the voltage of water pump works...
- Page 83 Troubleshooting Malfunction display: F3 Failure of Outdoor Ambient Sensor Failure of outdoor Ambient sensor Check if the plug of the temperature sensor is correctly Check the direction of the plug connected with socket on the mainboard and socket Remove the sensor to check if the resistance value is ok Replace temperature sensor Replace mainboard of the indoor uint Malfunction display: F5 Failure of Exhaust Temp.
- Page 84 Troubleshooting Appendix 1: Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( Temp( Temp( Temp( 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 3.454 0.98 108.7 15.68 3.333 0.952 102.9 3.217 0.925 97.4 14.36 3.105...
- Page 85 Troubleshooting Appendix 2: Resistance Table of Outdoor and Indoor Tube Temperature Sensors(20K) Temp( Temp( Temp( Temp( 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 1.233 129.9 19.14 4.14 1.198 18.13...
- Page 86 Troubleshooting Appendix3: Resistance Table for Outdoor Discharge Temperature Sensor (50K) Temp( Temp( Temp( Temp( 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 14.62 3.96 548.9 70.5 14.09...
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Page 87: Removal Procedure
Removal Procedure 10. Removal Procedure Warning Be sure to wait for a minimum of 10 minutes after turning off all power supplies before disassembly. (1) Models:GWHD(14)NK3BO,GWHD(18)NK3DO Steps Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove valve cover Remove the connection screw fixing the valve valve cover cover and then remove the valve cover. - Page 88 Removal Procedure Steps 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 Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
- Page 89 Removal Procedure Steps 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 90 Removal Procedure Steps Procedure 10. Remove axial flow blade Remove the nut on the blade and then remove the axial flow blade. axial flow blade 11. Remove motor and motor support Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
- Page 91 Removal Procedure Steps Procedure 13. Remove PFC induction Remove the screw connecting the PFC induction and middle isolation sheet, and then remove the PFC induction. PFC induction 14. Remove 4-way valve assy Unsolder the welding joint connecting the 4-way valve assy with compressor suction and discharge port, the 4-way valve valve with the outlet pipe of condenser.
- Page 92 Removal Procedure Steps Procedure 16. Remove middle isolation sheet Remove the screws connecting the middle isolation sheet with the chassis assy and the condenser assy, and then remove the middle isolation sheet. middle isolation sheet 17. Remove compressor compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor.
- Page 93 Removal Procedure (2) Model: GWHD(28)NK3BO Warning Be sure to wait for a minimum of 10 minutes after turning off all power supplies before disassembly. Steps Procedure 1. Before disassembly Complete axonometric drawing. 2. Remove valve cover valve cover Remove the connection screw fixing the valve cover and then remove the valve cover.
- Page 94 Removal Procedure Steps Procedure 4. Remove front grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille. grille 5. Remove front panel Remove the screws connecting the front panel and then remove the front panel.
- Page 95 Removal Procedure Steps Procedure 7. Remove rear grill rear grill Remove the screws connecting the rear grill and the left side plate, and then remove the rear grill. 8. Remove left side plate Remove the screws fixing the left side plate with the chassis and the condenser support, and then remove the left side plate.
- Page 96 Removal Procedure Steps Procedure 10. Remove axial flow blade Remove the nut on the blade and then remove the axial flow blade. axial flow blade 11. Remove motor and motor support Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
- Page 97 Removal Procedure Steps Procedure 13. Remove PFC induction Remove the screw connecting the PFC induction and middle isolation sheet, and then remove the PFC induction PFC induction． 14. Remove 4-way valve assy and suction pipe sub-assy 4-way valve assy Unsolder the welding joint connecting the 4-way valve assy with compressor suction and discharge port, the valve with the outlet pipe of condenser.
- Page 98 Removal Procedure Steps Procedure 16. Remove middle isolation sheet Remove the screws connecting the middle isolation sheet with the chassis assy and the condenser assy, and then remove the middle isolation sheet. middle isolation sheet 17. Remove compressor compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor.
- Page 99 Removal Procedure Steps Procedure 19. Remove electronic expansion valve assy Unsolder the welding joint connecting the electronic expansion valve sub-assy with the gas collection pipe, and then remove the electronic expansion valve assy. (Note: when unsoldering, wrap the gas valve with a wet cloth completely to avoid damage to the valve caused by high temperature).
- Page 100 Removal Procedure (3) Model: GWHD(36)NK3AO,GWHD(42)NK3AO Warning Be sure to wait for a minimum of 10 minutes after turning off all power supplies before disassembly. Disassembly and Assembly of Outer Casing Steps Procedure ① using a screwdriver. ② Remove the cover plate. ①...
- Page 101 Removal Procedure Steps Procedure 4. Dismount the grille ① a screwdriver. ② Remove the grille. ① using a screwdriver. ② Remove the outer casing. ① using a spanner. ②...
- Page 102 Removal Procedure Steps Procedure energize the unit for trial test. Disassembly and Assembly of Compressor Remark: Make sure that there is no refrigerant in pipe system and the power supply is cut off before disassembling the compress or. Steps Procedure 1.
- Page 103 Removal Procedure Steps Procedure ① ② suction inlet and discharge outlet with the pipe system ① ② Disassembly and Assembly of 4-way Valve Steps Procedure 1. Remove the 4-way valve coil ① Remove the screws on the fixed coil by using a screwdriver. ②...
- Page 104 Removal Procedure Steps Procedure Disconnect the 4-way valve and the connected pipe 3. Replace the 4-way valve and reconnect it with the pipeline. ① Place the new 4-way valve in the right place. ② Rewelding the new 4-way valve with the pipeline. 4.
- Page 105 Removal Procedure Disassembly and Assembly of Electronic Expansion Valve Steps Procedure 1. Remove the electronic expansion valve coil it until the lock is unfixed. 2. Disconnect the electronic expansion valve and the connected pipe Disconnect the electronic expansion valve and the 3.
- Page 106 Removal Procedure Disassembly and Assembly of Vapour Liquid Separator Steps Procedure 1. Disconnect the liquid separator and the connected pipeline Disconnect the liquid separator and the connected pipeline. 2. Remove the liquid separator ① ② 3. Fix the new liquid separator and connect it with the pipeline ①...
- Page 107 Add: West Jinji Rd, Qianshan, Zhuhai, Guangdong, China, 519070 Tel: (+86-756) 8522218 Fax: (+86-756) 8669426 E-mail: gree@gree.com.cn www.gree.com For continuous improvement in the products, Gree reserves the right to modidy the product specification and appearance in this manual without notice and without incurring any obligations.