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Table of Contents
Troubleshooting
Related Manuals for Gree GWC18MC-D3DNA3F/I
Summary of Contents for Gree GWC18MC-D3DNA3F/I
- Page 1 Change for Life Service Manual Model:GWC18MC-D3DNA3F GWC18MC-D3DNA5F GWH18MC-D3DNA3F GWH18MC-D3DNA5F GWH18MC-D3DNA8F GWC24MD-D3DNA3F GWC24MD-D3DNA5F GWH24MD-D3DNA3F GWH24MD-D3DNA5F GWH24MD-D3DNA8F (Refrigerant R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...
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Page 2: Table Of Contents
Service Manual Table of Contents Part Ⅰ : Technical Information ................. 1 1. Summary ........................1 2. Specifications ......................2 2.1 Specification Sheet ......................2 2.2 Operation Characteristic Curve ..................10 2.3 Capacity Variation Ratio According to Temperature ............10 2.4 Cooling and Heating Data Sheet in Rated Frequency ............11 2.5 Noise Curve ........................11 3. - Page 3 Service Manual 9. Maintenance ......................... 44 9.1 Precautions before Maintenance ..................44 9.2 Error Code List ........................45 9.3 Troubleshooting for Main Malfunction ................. 56 9.4 Troubleshooting for Normal Malfunction ................70 10. Exploded View and Parts List ..............72 10.1 Indoor Unit .........................
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Page 4: Part Ⅰ : Technical Information
Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit: GWC18MC-D3DNA3F/I GWH18MC-D3DNA3F/I GWC24MD-D3DNA3F/I GWH24MD-D3DNA3F/I GWH18MC-D3DNA8F/I GWH24MD-D3DNA8F/I GWC18MC-D3DNA5F/I GWH18MC-D3DNA5F/I GWC24MD-D3DNA5F/I GWH24MD-D3DNA5F/I Outdoor Unit: GWC18MC-D3DNA3D/O GWC24MD-D3DNA3D/O GWH18MC-D3DNA3D/O GWH24MD-D3DNA3D/O GWH18MC-D3DNA3D/O(electric heating band) GWH24MD-D3DNA3D/O(electric heating band) Remote Controller: YB1FAF(XFAN) ON/OFF MODE CLOCK TIMER ON... -
Page 5: Specifications
11.76 Air Flow Volume (S/H/M/L) 500/459/383/324 Dehumidifying Volume Pint/h (Btu/h)/W (Btu/h)/W SEER HSPF Application Area 32 2/7-50 1/4 GWC18MC-D3DNA3F/I Indoor Unit Model GWC18MC-D3DNA5F/I CB171N08800 Indoor Unit Product Code CB162N09400 Fan Type Cross-flow Fan Diameter Length(DXL) inch Φ3 6/7X28 Cooling Speed(S/H/M/L) - Page 6 Service Manual Outdoor Unit Model GWC18MC-D3DNA3D/O Outdoor Unit Product Code CB171W06800 MITSUBISHI ELECTRIC (GUANGZHOU) Compressor Manufacturer COMPRESSOR CO.,LTD Compressor Model SNB130FGAMC Compressor Oil FV50S/PVE Compressor Type Rotary Compressor LRA. 13.8 Compressor RLA Compressor Power Input 1200 Compressor Overload Protector INT11L-6578 Throttling Method Electron expansion valve Set Temperature Range...
- Page 7 Service Manual GWH18MC-D3DNA3F GWH18MC-D3DNA3F Model GWH18MC-D3DNA8F GWH18MC-D3DNA5F CB171008900 CB171008901 Product Code CB173004900 CB162009301 Rated Voltage V ～ 208/230 208/230 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min ～ Max) Btu/h 18000(5970~22350) 18000(5970~22350) Heating Capacity(Min ～ Max) Btu/h 19800(4100~22000) 19800(4100~22000)
- Page 8 Service Manual GWH18MC-D3DNA3D/O Outdoor Unit Model GWH18MC-D3DNA3D/O (electric heating band) Outdoor Unit Product Code CB171W04700 CB171W04701 MITSUBISHI ELECTRIC MITSUBISHI ELECTRIC Compressor Manufacturer (GUANGZHOU) COMPRESSOR (GUANGZHOU) CO.,LTD COMPRESSOR CO.,LTD Compressor Model SNB130FGAMC SNB130FGAMC Compressor Oil FV50S/PVE FV50S/PVE Compressor Type Rotary Rotary Compressor LRA.
- Page 9 Service Manual GWC24MD-D3DNA3F Model GWC24MD-D3DNA5F CB171009700 Product Code CB162009600 Rated Voltage V ～ 208/230 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Cooling Capacity(Min ～ Max) Btu/h 21400(9600~25000) Heating Capacity(Min ～ Max) Btu/h Cooling Power Input(Min ～ Max) 1780(500~2650) Heating Power Input(Min ～...
- Page 10 Service Manual Outdoor Unit Model GWC24MD-D3DNA3D/O Outdoor Unit Product Code CB171W06900 MITSUBISHI ELECTRIC (GUANGZHOU) Compressor Manufacturer COMPRESSOR CO. LTD Compressor Model SNB150FGAMC Compressor Oil PVE/FV50S Compressor Type Rotary Compressor LRA. 18.50 Compressor RLA 4.90 Compressor Power Input 1420 Compressor Overload Protector 1NT11L-6578 Throttling Method Electron expansion valve...
- Page 11 Service Manual GWH24MD-D3DNA3F GWH24MD-D3DNA3F Model GWH24MD-D3DNA5F GWH24MD-D3DNA8F CB171009801 CB171009800 Product Code CB162009501 CB173005000 Rated Voltage V ～ 208/230 208/230 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min ～ Max) Btu/h 21400(9600~25000) 21400(9600~25000) Heating Capacity(Min ～ Max) Btu/h 23000(4300~26000) 23000(4300~26000)
- Page 12 Service Manual GWH24MD-D3DNA3D/O Outdoor Unit Model GWH24MD-D3DNA3D/O (electric heating band) Outdoor Unit Product Code CB171W07001 CB171W07000 MITSUBISHI ELECTRIC MITSUBISHI ELECTRIC Compressor Manufacturer (GUANGZHOU)COMPRESSOR (GUANGZHOU)COMPRESSOR CO. LTD CO. LTD Compressor Model SNB150FGAMC SNB150FGAMC Compressor Oil PVE/FV50S PVE/FV50S Compressor Type Rotary Rotary Compressor LRA.
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Page 13: Operation Characteristic Curve
Service Manual 2.2 Operation Characteristic Curve 18K Unit Cooling Heating 220V •Conditions cooling 220V Indoor DB 80˚F/WB 67˚F Outdoor : DB 95˚F/WB75˚F Indoor air flow : Turbo Pipe length : 24 3/5 ft. 230V 230V 240V •Conditions heating Indoor : DB 70˚F/WB 60˚F 240V Outdoor : DB 47˚F/WB 43˚F Indoor air flow : Turbo... -
Page 14: Cooling And Heating Data Sheet In Rated Frequency
Service Manual 2.4 Cooling and Heating Data Sheet in Rated Frequency Cooling: Pressure of gas pipe Inlet and outlet pipe Rated cooling condition (°F) Fan speed Fan speed connecting indoor temperature of heat Compressor (DB/WB) Model of indoor of outdoor and outdoor unit exchanger revolution (rps) -
Page 15: Outline Dimension Diagram
Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit 27 1/3 7 2/3 18K Unit Ф2 1/6 Ф2 1/6 3 1/3 6 2/7 5 1 2 7 1/4 24K Unit Ф2 3/4 Ф2 3/4 Unit:inch 2 5/9 3 1/2 Model 11 3/4 7 7/8 39 2/3... -
Page 16: Outdoor Unit
Service Manual 3.2 Outdoor Unit 18K Unit 13 2/5 15 3/5 Unit: inch 24K Unit 14 4/7 16 4/5 38 4/7 Unit:inch Technical Information... -
Page 17: Refrigerant System Diagram
Service Manual 4. Refrigerant System Diagram Cooling only model Outdoor unit Indoor unit Gas pipe side Valve Di s charge Heat exchanger (evaporator) Suction Accumlator Compressor Heat exchanger Liquid pipe (condenser) side Valve Capillary Strainer COOLING Cooling and heating model Outdoor unit Indoor unit Gas pipe... -
Page 18: Electrical Part
Brown COMP Compressor Blue Grounding wire YEGN Yellow/Green Black Violet Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. ● Indoor Unit GWC18MC-D3DNA3F/I GWC18MC-D3DNA5F/I GWH18MC-D3DNA3F/I GWH18MC-D3DNA8F/I GWH18MC-D3DNA5F/I Technical Information... - Page 19 Service Manual GWC24MD-D3DNA3F/I GWC24MD-D3DNA5F/I GWH24MD-D3DNA3F/I GWH24MD-D3DNA8F/I GWH24MD-D3DNA5F/I ●Outdoor Unit GWC18MC-D3DNA3D/O Technical Information...
- Page 20 Service Manual GWH18MC-D3DNA3D/O(CB171W04700) GWH18MC-D3DNA3D/O(electric heating band)(CB171W04701) Technical Information...
- Page 21 Service Manual GWC24MD-D3DNA3D/O OVERLOAD PROTECTOR GWH24MD-D3DNA3D/O(CB171W07000) OVERLOAD PROTECTOR Technical Information...
- Page 22 Service Manual GWH24MD-D3DNA3D/O(electric heating band)(CB171W07001) These wiring diagrams are subject to change without notice; please refer to the one supplied with the unit. Technical Information...
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Page 23: Pcb Printed Diagram
Service Manual 5.2 PCB Printed Diagram Indoor Unit GWC18MC-D3DNA3F/I GWC18MC-D3DNA5F/I GWH18MC-D3DNA3F/I GWH18MC-D3DNA8F/I GWH18MC-D3DNA5F/I ● Top view Interface of PG motor Up and down swing terminal interface Feedback interface of indoor Interface of display Jumper cap Wired controller Tube temperature sensor... - Page 24 Service Manual GWC24MD-D3DNA3F/I GWC24MD-D3DNA5F/I GWH24MD-D3DNA3F/I GWH24MD-D3DNA8F/I GWH24MD-D3DNA5F/I ● Top view DC fan interface Auto button Up and down swing terminal interface Display terminal interface Jumper cap Ambient temp. sensor Tube temp. sensor IDU and ODU communication interface Live wire interface Fuse Neutral wire interface Earth wire terminal interface...
- Page 25 Service Manual Outdoor Unit GWC18MC-D3DNA3D/O GWH18MC-D3DNA3D/O GWH18MC-D3DNA3D/O(electric heating band) ● Top view Compressor wiring connection terminal ODU heat exchanger middle copper pipe temp. sensor terminal Compressor overload protection terminal ODU temp. sensor terminal EXV terminal Outdoor fan terminal Four-way valve terminal Chassis electric heating wiring terminal...
- Page 26 Service Manual GWC24MD-D3DNA3D/O GWH24MD-D3DNA3D/O GWH24MD-D3DNA3D/O(electric heating band) ● Top view Compressor wiring connection terminal 低温制冷感温包端子 Compressor overload protection terminal ODU temp. sensor terminal EXV terminal Outdoor fan terminal Four-way valve terminal Communication cable with IDU Power supply live wire Earth wire Power supply neutral wire PFC inductance wire...
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Page 27: Function And Control
Service Manual 6. Function and Control 6.1 Remote Controller Introduction Buttons on Remote Controller ON/OFF Button MODE Button +/- Button FAN Button Button CLOCK Button TIMER ON/TIMER-OFF Button X-FAN Button TEMP Button TURBO Button LIGHT Button SLEEP Button Introduction for Icons on Display Screen Operation mode Set fan speed Operation mode... - Page 28 Service Manual ● When selecting auto mode, Air conditioner will start auto operation according to indoor ambient temperature.Set temperature can’t be adjusted and will not be displayed as well. Press "FAN" button can adjust fan speed. Press " " button can adjust fan blowing angle. ●...
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Page 29: Function Introduction For Combination Buttons
Service Manual controller blinks. Press "+" or "-"button to adjust TIMER ON setting. After each pressing "+" or "-"button, TIMER ON setting will increase or decrease 1min. Hold "+" or "-"button, 2s later, the time will change quickly until reaching your required time. Press “ TIMER ON”to confirm it. The word “ON" will stop blinking. " "... -
Page 30: Operation Guide
Service Manual Operation Guide 1. After putting through the power, press “ON/OFF” button on remote controller to turn on the air conditioner. 2. Press "MODE" button to select your required mode:AUTO,COOL,DRY,FAN,HEAT. 3. Press “+” or “-“ button to set your required temperature. (Temperature can’t be adjusted under auto mode). -
Page 31: Brief Description Of Modes And Functions
Service Manual 6.2 Brief Description of Modes and Functions 1 General introduction (1) Buzzer When the controller is energized or receives any command or signal from the buttons or the remote controller, the buzzer will give out a beep. (2) Display Dual-8 nixie After energizing, the unit will display all icons. - Page 32 Service Manual Start cooling Tamb. Tpreset -32.9˚F Original operating status Tpreset –35.6 ˚F Stop cooling 7 min. 3 min. 7 min. Graphic instruction: (Same as below) Compressor Indicates operation Outdoor fan motor Indicates stop Indoor fan motor Set fan speed ②...
- Page 33 Service Manual fan motor blows residual heat for a while at set speed to prevent high temperature inside the unit. ◆ When Tset+38.3 F ＜ Tamb. ＜ Tset+41 F, the unit will maintain its previous operation status. ◆ When the unit stops due to malfunction or protection, the compressor, IDU fan motor and ODU fan motor stop operation. ◆...
- Page 34 Service Manual ◆ Timer ON: If timer ON is set during operation of the unit, the unit will continue to operate. If timer ON is set at unit OFF, upon ON time reaches the unit will start to run according to previous setting status. ◆...
- Page 35 Service Manual ④ Swing function is available only when swing function is set and IDU fan motor is operating. (8) Display of nixie tube on indoor unit ◆ When energized & started for the first time, the nixie tube defaults to displaying current set temperature. ◆...
- Page 36 Service Manual closed by pressing the HEALTH button on remote controller or turning off the unit. ② If the unit is equipped with the remote controller without HEALTH button, the unit defaults health function ON. Health function will be closed when turning off the unit. (2) I FEELfunction When I FEEL command is received, the controller will operate according to the ambient temperature sent by the remote controller (For defrosting and cold air prevention, the unit operates according to the ambient temperature sensed by the air conditioner).
- Page 37 Service Manual (9) Compressor overload protection (indoor unit displays H3 in cooling, heating or dry mode) ① If disconnection of compressor overload switch is detected for 3S continuously, the system will stop for compressor overload protection; when the protection is eliminated and the compressor has stopped for 3min, the unit will resume running; ②...
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Page 38: Part Ⅱ : Installation And Maintenance
Service Manual Part Ⅱ : Installation and Maintenance 7. Notes for Installation and Maintenance Safety Precautions: 10. If the power cord or connection wire is not long enough, please get the specialized power cord or connection wire Important! from the manufacture or distributor. Prohibit prolong the wire by yourself. - Page 39 Service Manual Main Tools for Installation and Maintenance 1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill 4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner hexagon spanner 7. Electronic leakage detector 8.
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Page 40: Installation
Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall Space to the wall At least 5 8/9 inch At least 5 8/9 inch Drainage pipe Installation and Maintenance... -
Page 41: Installation Procedures
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 Fix outdoor unit... -
Page 42: Installation Parts-Checking
Service Manual 8.2 Installation Parts-checking 8.4 Electric Connection Requirement 1. Safety Precaution Name Name (1) Must follow the electric safety regulations when installing Indoor unit Sealing gum the unit. Outdoor unit Wrapping tape (2) According to the local safety regulations, use qualified Support of outdoor Connection pipe power supply circuit and air switch. - Page 43 Service Manual in the holes. 5. Connect the Pipe of Indoor Unit (3) Fix the wall-mounting frame on the wall with tapping screws (1) Aim the pipe joint at the corresponding bellmouth.(As show (ST4.2X25TA) and then check if the frame is firmly installed by in Fig.5) pulling the frame.
- Page 44 Service Manual 7. Connect Wire of Indoor Unit 8. Bind up Pipe (1) Open the panel, remove the screw on the wiring cover and (1) Bind up the connection pipe, power cord and drain hose then take down the cover.(As show in Fig.11) with the band.(As show in Fig.14) (2) Reserve a certain length of drain hose and power cord Panel...
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Page 45: Installation Of Outdoor Unit
Service Manual 8.6 Installation of Outdoor Unit Refer to the following table for wrench moment of force: 1. Fix the Support of Outdoor Unit(select it according to the actual installation situation) Hex nut diameter(inch) Tightening torque(ft·Ibf) (1) Select installation location according to the house structure. Φ1/4 11.10~14.75 (2) Fix the support of outdoor unit on the selected location with... -
Page 46: Vacuum Pumping And Leak Detection
Service Manual Note: 2. Leakage Detection (1) The through-wall height of drain hose shouldn't be higher (1) With leakage detector: than the outlet pipe hole of indoor unit.(As show in Fig.25) Check if there is leakage with leakage detector. (2) Slant the drain hose slightly downwards. The drain hose (2) With soap water: can't be curved, raised and fluctuant, etc.(As show in Fig.26) If leakage detector is not available, please use soap water for... -
Page 47: Maintenance
Service Manual 9. Maintenance 9.1 Precautions before Maintenance 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 48: Error Code List
Service Manual 9.2 Error Code List Display Method of Outdoor Unit Display Method (Indicator has 3 kinds of display status and of Indoor Unit they will be displayed circularly every 5s.) Malfunction A/C Status Possible Causes Countermeasures □OFF Name ■Illuminated ☆ Blink Display of dual-8 nixie tube D40/D5... - Page 49 Service Manual 1. Check whether Power voltage power supply is unstable, big network is fluctuation. abnormal; During cooling and drying operation, compressor and Overcurrent outdoor fan stop protection Power voltage is □ ■ ☆ □ while indoor fan 2. Reduce load; too low;...
- Page 50 Service Manual Connection terminal between indoor ambient temperature sensor and main board is loose or poor connection. The unit will stop operation as There’s short circuit it reaches the due to trip-over of temperature point. the parts on main During cooling and board;...
- Page 51 Service Manual Feedback terminal of PG motor hasn't been inserted tightly. Indoor fan, outdoor fan, Control terminal of PG compressor motor is not inserted Blockage and electric Refer to tightly. protection of heating tube all maintenance indoor unit stop operation; flowchart Fan is blocked horizontal louver...
- Page 52 Service Manual During cooling and drying operation, Malfunction compressor and of outdoor outdoor fan stop condenser □ □ ☆ □ while indoor fan temperature operates. During sensor 1.T-SENSOR heating operation, all 1. After de- terminal hasn’t loads stop. energization, been inserted reinsert T-SENSOR tightly;...
- Page 53 Service Manual Overload; ambient All loads temperature is too 1. Reduce load; operates high; Decrease normally, while Refrigerant is not frequency 2. Add refrigerant operation enough ■ ■ □ □ due to high 3. Replace electronic frequency of Malfunction of air discharge expansion valve →...
- Page 54 Service Manual During cooling and See 9.3 (diagnosis drying operation, of IPM protection, compressor and Overcurrent desynchronizing Refer to outdoor fan stop while protection of malfunction, maintenance □ ☆ □ □ indoor fan operates. phase current overcurrent protection flowchart During heating of phase current of operation, all loads compressor)
- Page 55 Service Manual During cooling and drying operation, compressor and Refer to outdoor fan stop See 9.3 (diagnosis of 23 PFC protection maintenance □ ■ ☆ ☆ while indoor fan PFC protection) flowchart operates. During heating operation, all loads stop. During cooling and See 9.3 (diagnosis drying operation, of IPM protection,...
- Page 56 Service Manual 1. Check whether the Wrong match between capacity of indoor unit indoor unit and and outdoor unit is During cooling and outdoor unit; matching with each drying operation, other; compressor and malfunction outdoor fan stop of read □ □...
- Page 57 Service Manual During cooling and drying operation, Drop compressor and 1. Check whether Power voltage malfunction outdoor fan stop while power supply is unstable, big □ ■ ■ ■ of DC busbar indoor fan operates. network is fluctuation. voltage During heating abnormal;...
- Page 58 Service Manual During cooling and drying operation, compressor and Hardware Zero-crossing 1. Replace outdoor fan stop malfunction of malfunction of outdoor unit's ■ ■ ☆ □ while indoor fan outdoor unit's main outdoor unit main board AP1; operates. During board; heating operation, all loads stop.
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Page 59: Troubleshooting For Main Malfunction
Service Manual 9.3 Troubleshooting for Main Malfunction 1. Malfunction of Temperature Sensor F1, F2 Main detection points: ● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? ● Is there short circuit due to trip-over of the parts? ●... - Page 60 Service Manual 2. Malfunction of Blocked Protection of IDU Fan Motor H6 Main detection points: ● SmoothlyIs the control terminal of PG motor connected tightly? ● SmoothlyIs the feedback interface of PG motor connected tightly? ● The fan motor can't operate ？ ●...
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Page 61: Installation And Maintenance
Service Manual Main detection points: ● SmoothlyIs the control terminal of indoor fan motor connected tightly? ● SmoothlyIs the feedback interface of indoor fan motor connected tightly? ● The fan motor can't operate ？ ● The motor is broken? ● Detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: For 24K Start... - Page 62 Service Manual 3. Malfunction of Protection of Jumper Cap C5 Main detection points: ● MalfunctionIs there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● Detectioncircuit of the mainboard isdefined abnormal? Malfunction diagnosis process: Troubleshooting for C5 malfunction...
- Page 63 Service Manual 4. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Main detection points: ● Power supply is abnormal? ● Detection circuit of indoor control mainboard is abnormal? Malfunction diagnosis process: Troubleshooting for U8 malfunction Re-energize1 minute after de-erergization The unit returns to normal.
- Page 64 Service Manual 5. Malfunction of Overcurrent Protection E5 Main detection points: ● EliminatedIs the supply voltage unstable with big fluctuation? ● Is the supply voltage too low with overload? ● Hardware trouble? Malfunction diagnosis process: Troubleshooting for E5 malfunction Is the supply voltage unstable Normal fluctuation is within 10 % of the rated Malfunction is with big fluctuation?
- Page 65 Service Manual 6.Capacity charging malfunction (outdoor unit malfunction) (AP1 below means control board of outdoor unit) Main detection points: ● Detect if the voltage of L and N terminal of XT wiring board is between 210VAC-240VAC by alternating voltage meter; ●...
- Page 66 Service Manual 7.IPM protection(H5), desynchronizing malfunction(H7), overcurrent of compressor phase current (P5) (AP1 below means control board of outdoor unit) Main detection points: ● Is voltage input within the normal range ● If the control board AP1 is well connected with compressor COMP? If they are loosened? If the connection sequence is correct? ●...
- Page 67 Service Manual 8.High temperature and overload protection (E8)(AP1 below means control board of outdoor unit) Main detection points: ● If the outdoor ambient temperature is in normal range; ● If the indoor and outdoor fan are running normally; ● If the radiating environment of indoor and outdoor unit is good. E8 is displayed Normal protection, please If the outdoor...
- Page 68 Service Manual 9.Start-up failure (LC) (AP1 below means control board of outdoor unit) Main detection points: ● If the compressor wiring is correct? ● If the stop time of compressor is sufficient? ● If the compressor is damaged? ● If the refrigerant charging amount is too much? Turn on the unit The stop time is not sufficient and If the stop time of compressor...
- Page 69 Service Manual 10.Overload and high discharge temperature malfunction Main detection points: ● If the electronic expansion valve is connected well? Is the electronic expansion valve damaged? ● If the refrigerant is leaked? ● The compressor overload protection terminal is not connected well with the mainboard? ●...
- Page 70 Service Manual H3 or E4 is displayed 30min after power off the unit If the overload protector SAT is well connected? Under ambient temperature, test the resistance of overload protector with ohmmeter; resistance value should be＜1000ohm Connect wire If the wiring terminal FA of electronic according to wiring expansion valve is well connected? diagram...
- Page 71 Service Manual 11.PFC (correction for power factor) malfunction (outdoor unit malfunction) Main detection points: ● Check if power plug is connected well with the socket ● Check if the reactor of outdoor unit is damaged? Malfunction diagnosis process: start If power plug is connected Is the malfunction Connect the plug correctly well with the socket...
- Page 72 Service Manual 12.Communication malfunction (E6) Main detection points: ● Check if the connection wire and the built-in wiring of indoor and outdoor unit are connected well and without damage; ● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is damaged? Malfunction diagnosis process: If the unit operates normally before malfunction...
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Page 73: Troubleshooting For Normal Malfunction
Service Manual 9.4 Troubleshooting for Normal Malfunction 1. Air Conditioner Can't be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether it's due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t bright wait for power recovery. - Page 74 Service Manual 4. ODU Fan Motor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram firmly...
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Page 75: Exploded View And Parts List
Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit GWC18MC-D3DNA3F/I GWC18MC-D3DNA5F/I GWH18MC-D3DNA3F/I GWH18MC-D3DNA5F/I Installation and Maintenance... - Page 76 Service Manual Part Code Description GWC18MC-D3DNA3F/I GWH18MC-D3DNA3D/I Product Code CB171N08800 CB171N08900 Front Panel Assy 20012260 20012260 Filter Sub-Assy 11122089 1112208901 Screw Cover 24252016 24252016 Baffle Plate 26112228 26112228 Front Case Sub-assy 20022172 20012288 Air Louver 1 10512708 10512708 Air Louver 2...
- Page 77 Service Manual Part Code Description GWC18MC-D3DNA5F/I GWH18MC-D3DNA5F/I Product Code CB162N09400 CB162N09300 Front Panel Assy 20012286 20012286 Filter Sub-Assy 11122089 11122089 Screw Cover 24252016 24252016 Baffle Plate 26112228 26112228 Front Case Sub-assy 20022172 20022172 Air Louver 1 10512708 10512708 Air Louver 2 10512709 10512709 Helicoid Tongue...
- Page 78 Service Manual GWH18MC-D3DNA8F/I Installation and Maintenance...
- Page 79 Service Manual Part Code Description GWH18MC-D3DNA8F/I Product Code CB173N04900 Front Panel Assy 20012285 Filter Sub-Assy 1112208901 Screw Cover 24252016 Front Case Sub-assy 20022205 Air Louver 1 10512708 Air Louver 2 10512709 Helicoid Tongue 26112238 Left Axile Bush 10512037 Rear Case assy 22202128 Rubber Plug (Water Tray) 76712012...
- Page 80 Service Manual GWC24MD-D3DNA3F/I GWC24MD-D3DNA5F/I GWH24MD-D3DNA3F/I GWH24MD-D3DNA5F/I FA N MODE I F EEL TIMER C LOC K X- FA N T EMP TIMER T URBO SLEEP LIGH T Technical Information...
- Page 81 Service Manual Part Code Description GWC24MD-D3DNA3F/I GWH24MD-D3DNA3F/I Product Code CB171N09700 CB171N09800 Front Panel Assy 20012328 20012328 Filter Sub-Assy 1112209101 1112209101 Screw Cover 24252016 24252016 Front Case Assy 2001232901 2001232901 Air Louver 10512141 10512141 Helicoid tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case Assy...
- Page 82 Service Manual Part Code Description GWC24MD-D3DNA5F/I GWH24MD-D3DNA5F/I Product Code CB162N09600 CB162N09500 Front Panel Assy 20012368 20012368 Filter Sub-Assy 1112209101 1112209101 Screw Cover 24252016 24252016 Front Case Assy 2001232901 2001232901 Air Louver 10512141 10512141 Helicoid tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case Assy...
- Page 83 Service Manual GWH24MD-D3DNA8F/I Installation and Maintenance...
- Page 84 Service Manual Part Code Description GWH24MD-D3DNA8F/I Product Code CB173N05000 Front Panel Assy 20012372 Filter Sub-Assy 1112209101 Screw Cover 24252016 Front Case Assy 2001232903 Air Louver 10512141 Helicoid tongue 26112187 Left Axile Bush 10512037 Rear Case Assy 2220211701 Rubber Plug(Water Tray) 76712012 Ringof Bearing 26152025...
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Page 85: Outdoor Unit
Service Manual 10.2 Outdoor Unit GWC18MC-D3DNA3D/O Installation and Maintenance... - Page 86 Service Manual Part Code Description GWC18MC-D3DNA3D/O Product Code CB171W06800 Rear Grill 01473043 Cabinet 01433047P Axial Flow Fan 10335008 Fan Motor 1501506402 Chassis Sub-assy 02803062P Compressor and Fittings 00105241 Compressor Gasket 76715021 Inhalation Tube 03723930 Discharge Tube Sub-assy 03833122 Electric Expansion Valve Sub-Assy 07133681 Valve Support Assy 01715010P...
- Page 87 Service Manual GWH18MC-D3DNA3D/O Installation and Maintenance...
- Page 88 Service Manual Part Code Description GWH18MC-D3DNA3D/O Product Code CB171W04700 Rear Grill 01473043 Cabinet 01433047P Axial Flow Fan 10335008 Fan Motor 1501506402 Chassis Sub-assy 02803062P Drainage Connecter 06123401 Gas-liquid Separator Assy 07225017 Compressor and Fittings 00105241 4-Way Valve Assy 03123891 Electric Expansion Valve Sub-Assy 07133681 Valve Support Assy 01715010P...
- Page 89 Service Manual GWH18MC-D3DNA3D/O(electric heating band) Installation and Maintenance...
- Page 90 Service Manual Part Code Description GWH18MC-D3DNA3D/O(electric heating band) Product Code CB171W04701 Front Grill 01473049 Cabinet 01433047P Axial Flow Fan 10335008 Drainage Plug 06813401 Fan Motor 1501506402 Electrical Heater (Chassis) 765100045 Chassis Sub-assy 02803083P Drainage Connecter 06123401 Gas-liquid Separator Assy 07225017 Compressor and Fittings 00105241 4-Way Valve Assy...
- Page 91 Service Manual GWC24MD-D3DNA3D/O Installation and Maintenance...
- Page 92 Service Manual Part Code Description GWC24MD-D3DNA3D/O Product Code CB171W06900 Front Grill 01473050 Fan Motor 1501506205 Capacitor CBB61 33010011 Radiator 49010252 Main Board 30148126 Electric Box Assy 02603940 Terminal Board 42010255 Left Handle 26233053 Left Side Plate 01305043P Top Cover 01255006P Motor Support Sub-Assy 01705025 Condenser Support Plate...
- Page 93 Service Manual GWH24MD-D3DNA3D/O GWH24MD-D3DNA3D/O(electric heating band) 31 30 Installation and Maintenance...
- Page 94 Service Manual Part Code Description GWH24MD-D3DNA3D/O(electric GWH24MD-D3DNA3D/O heating band) Product Code CB171W07000 CB171W07001 Front Grill 01473050 01473050 Fan Motor 1501506205 1501506205 Capacitor CBB61 33010011 33010011 Radiator 49010252 49010252 Main Board 30148256 30148256 Electric Box Assy 02603939 02603939 Terminal Board 42010255 42010255 Left Handle 2623540103...
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Page 95: Removal Procedure
Service Manual 11. Removal Procedure Caution: discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit 18K: Steps Procedure 1. Remove filter Open the panel. Panel Loosen the clasp shown in the fig and then pull the left filter and right filer outwards to remove them. - Page 96 Service Manual Procedure Steps 3. Remove panel Panel Open the panel; separate the panel rotation shaft from the groove fixing the front panel and then removes the front panel. Note: The display of some models is fixed on Panel rotation the panel;...
- Page 97 Service Manual Steps Procedure 6. Remove vertical louver Loosen the connection clasps between vertical louver and bottom case to remove vertical louver. Bottom case Vertical louver Clasps 7. Remove electric box assy Loosen the connection clasps between shield cover of electric box sub-assy and electric box, and then remove the shield cover of electric box sub-assy.
- Page 98 Service Manual Steps Procedure Remove two screws fixing display. Note: The display of some models is fixed on the panel; unscrew the screws fixing the display on the panel before removing the Display Screws panel. Screws Remove the screw fixing electric box assy and then remove the electric box assy.
- Page 99 Service Manual Steps Procedure Step motor 9. Remove stepping motor Screws Remove the screw fixing step motor and then remove the step motor. 10. Remove motor and cross flow blade Remove the screws fixing motor clamp and then remove the motor clamp. Motor clamp Cross flow Remove the screws at the connection...
- Page 100 Service Manual 24K: Steps Procedure 1. Remove filter panel Open the panel. Loosen the clasp shown in the fig and then pull the left filter and right filer outwards to remove them. clasp left filter and right filer 2. Remove panel panel Open the front panel;...
- Page 101 Service Manual Steps Procedure 3. Remove horizontal louver Push out the axile bush on horizontal louver. Bend the horizontal louver with hand and then horizontal louver separate the horizontal louver from the crankshaft of step motor to remove it. location of step motor axile bush 4.
- Page 102 Service Manual Steps Procedure 6. Remove vertical louver Loosen the connection clasps between vertical bottom louver and bottom case to remove vertical case louver. vertical louver clasps electric box 7. Remove electric box assy Loosen the connection clasps between shield cover of electric box sub-assy and electric box, and then remove the shield cover of electric box sub-assy.
- Page 103 Service Manual Steps Procedure Remove two screws fixing display. Note: The display of some models is fixed on the panel; unscrew the screws fixing the display on the panel before removing the panel. screws display electric box Remove the screw fixing electric box assy and then remove the electric box assy.
- Page 104 Service Manual Steps Procedure 9. Remove stepping motor Remove the screw fixing step motor and then remove the step motor. screws 10. Remove motor and cross flow blade motor clamp Remove the screws fixing motor clamp and then remove the motor clamp. cross flow screws Remove the screws at the connection place of...
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Page 105: Removal Procedure Of Outdoor Unit
Service Manual 11.2 Removal Procedure of Outdoor Unit Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. 18K: NOTE:Take heat model without electric heating belt for example. Steps Procedure 1. - Page 106 Service Manual Steps Procedure 2.Remove front grille and front panel Remove the screws connecting the front grille and the front panel. Remove the front grille. front grille Twist off the screws fi xing the panel, pull it upward, loosen the clasp on the right side, rotate it to the left and then remove the front panel.
- Page 107 Service Manual Steps Procedure 4.Remove axial flow fan Remove the nuts fixing the blade and then remove the axial flow fan. axial flow fan electric box 5.Remove electric box and fireproof electric Remove the screws fixing the electric box sub-assy; loosen the wire bundle;...
- Page 108 Service Manual Steps Procedure 6.Remove sound-proof sponge Remove the soundproof sponge wrapping the compressor. sound-proof sponge 7.Remove isolation sheet Remove screws fixing isolation sheet and then remove the isolation sheet. isolation sheet 8.Remove gas valve and liquid valve Twist off the 2 bolts fixing the valve sub-assy. Unsolder the soldering joint between gas valve and air-return pipe and then remove the gas valve.
- Page 109 Service Manual Steps Procedure 9.Remove 4-way valve 4-way valve Discharge the refrigerant completely;unsolder the pipeline connecting the compressor and the condenser assy,and then remove the 4-way valve. 10.Remove compressor compressor Twist off the three foot nuts on compressor and then remove the compressor.
- Page 110 Service Manual 24K: NOTE:Take heat model for example. Steps Procedure 1.Remove handle and valve cover Twist off the screws used for fixing the handle, pull handle the handle upward to remove it.Loosen the screws fixing the valve cover and then remove it. valve cover 2.Remove top cover top cover...
- Page 111 Service Manual Steps Procedure 4.Remove front side plate and front panel Remove screws connecting front side plate, outer case and chassis,and then remove the front side plate. front side plate front panel Remove screws fixing front panel,chassis and motor support, and then remove the front panel. 5.Remove right side plate right side plate Remove screws connecting right side plate and...
- Page 112 Service Manual Steps Procedure 6.Remove axial flow blade Remove nut on blade with wrench,and then remove the axial flow blade. axial flow blade 7.Remove electric box and fireproof electric box electric box Remove screws fixing electric box,cut off the tielien with scissors, pull out the wiring terminal and then lift fire proof electric box up the electric box to remove it.
- Page 113 Service Manual Steps Procedure Twist off the tapping screws fixing the motor support, pull it upwards and then remove the motor support. motor support 9.Remove isolation sheet Twist off the screws connecting isolation sheet and end plate of condenser and chassis, and then remove the isolation sheet.
- Page 114 Service Manual Steps Procedure 11.Remove gas valve and liquid valve Twist off the 2 bolts fixing the valve sub-assy. Unsolder the soldering joint between gas valve and air-return pipe and then remove the gas valve. (note: when unsoldering the soldering joint, wrap the gas valve with wet cloth completely to avoid the damage to valve, and release all refrigerant completely at first).
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Page 115: Appendix
Service Manual Appendix: Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius （℃） Celsius （℃） Celsius （℃） temperature temperature temperature （℉）... -
Page 116: Appendix 3: Pipe Expanding Method
Service Manual Appendix 3: Pipe Expanding Method Pipe Note: Pipe cutter Improper pipe expanding is the main cause of refrigerant leakage.Please expand the pipe according to the following steps: Leaning Uneven Burr A:Cut the pip ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●... -
Page 117: Appendix 4: List Of Resistance For Temperature Sensor
Service Manual Appendix 4: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor (15K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -2.2 138.1 18.75 138.2 3.848 208.4 1.071 -0.4 128.6 69.8 17.93 3.711 210.2 1.039... - Page 118 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) -2.2 181.4 25.01 138.2 5.13 208.4 1.427 -0.4 171.4 69.8 23.9 4.948 210.2 1.386 162.1 71.6 22.85 141.8 4.773 1.346 153.3 73.4...
- Page 119 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) Temp.( Resistance(kΩ) -20.2 853.5 120.2 18.34 190.4 4.754 -18.4 799.8 51.8 93.42 17.65 192.2 4.609 -16.6 53.6 89.07 123.8 16.99 4.469 -14.8 703.8 55.4 84.95 125.6 16.36...
- Page 120 GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI Add: West Jinji Rd, Qianshan, Zhuhai, Guangdong, China 519070 Tel: (+86-756) 8522218 Fax: (+86-756) 8669426 Email: gree@gree.com.cn Http://www.gree.com HONG KONG GREE ELECTRIC APPLIANCES SALES LIMITED Add: Unit 2612,26/F.,Miramar Tower 132 Nathan Road,TST,Kowloon,HK Tel: (852) 31658898 Fax: (852) 31651029...
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