Gree GWH18MC-K3DNB7G Service Manual
  1. Manuals
  2. Brands
  3. Gree Manuals
  4. Air Conditioner
  5. GWH18MC-K3DNB7G
  6. Service manual
Gree GWH18MC-K3DNB7G Service Manual

Gree GWH18MC-K3DNB7G Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Change for Life
Service Manual
Models:
GWH18MC-K3DNA2G
GWH18MC-K3DNA3G
GWH18MC-K3DNA5G
GWH18MC-K3DNB3G
GWH18MC-K3DNC9G
GWH18MC-K3DND3G
GWH18MC-K3DNE3G
GWH18MC-K3DNB7G
GWH18MC-K3DNA4G
GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
GWH24MD-K3DNA2G
GWH24MD-K3DNA3G
GWH24MD-K3DNA5G
GWH24MD-K3DNB3G
GWH24MD-K3DNC9G
GWH24MD-K3DND3G
GWH24MD-K3DNE3G
GWH18MC-K3DNA8G
GWH18MC-K3DNC1G
GWH18MC-K3DNC2G
GWH18MC-K3DNC5G
GWH24MD-K3DNA4G
GWH24MD-K3DNA5G
GWH24MD-K3DNA8G
GWH24MD-K3DNC1G
GWH24MD-K3DNC5G
GWH24MD-K3DNC2G
GWH24MD-K3DNA4G
(Refrigerant:R410A)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GWH18MC-K3DNB7G and is the answer not in the manual?

Questions and answers

Related Manuals for Gree GWH18MC-K3DNB7G

Summary of Contents for Gree GWH18MC-K3DNB7G

  • Page 1 Change for Life Service Manual Models: GWH18MC-K3DNC2G GWH18MC-K3DNA2G GWH24MD-K3DNA2G GWH18MC-K3DNC5G GWH18MC-K3DNA3G GWH24MD-K3DNA3G GWH24MD-K3DNA4G GWH18MC-K3DNA5G GWH24MD-K3DNA5G GWH24MD-K3DNA5G GWH18MC-K3DNB3G GWH24MD-K3DNB3G GWH24MD-K3DNA8G GWH18MC-K3DNC9G GWH24MD-K3DNC9G GWH24MD-K3DNC1G GWH18MC-K3DND3G GWH24MD-K3DND3G GWH24MD-K3DNC5G GWH18MC-K3DNE3G GWH24MD-K3DNE3G GWH24MD-K3DNC2G GWH18MC-K3DNB7G GWH18MC-K3DNA8G GWH24MD-K3DNA4G GWH18MC-K3DNA4G GWH18MC-K3DNC1G (Refrigerant:R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...

  • Page 2: Table Of Contents

    Service Manual Table of Contents Part Ⅰ : Technical Information ................1 1. Summary ........................1 2. Specifications ......................3 2.1 Specification Sheet ......................3 2.2 Operation Characteristic Curve ..................13 2.3 Capacity Variation Ratio According to Temperature ............13 2.4 Cooling and Heating Data Sheet in Rated Frequency ............14 2.5 Noise Curve ........................14 3.
  • Page 3 Service Manual 9. Maintenance ........................46 9.1 Malfunction Display of Indoor Unit ................... 46 9.2 Procedure of Troubleshooting ....................48 9.4 Troubleshooting for Normal Malfunction .................. 65 10. Exploded View and Parts List ............... 67 10.1 Indoor Unit ..........................67 10.2 Outdoor Unit ..........................

  • Page 4: Part Ⅰ : Technical Information

    Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit A2 panel A3 panel A5 panel B3 panel C9 panel D3 panel A8 panel E3 panel C1 panel C2 panel B7 panel C5 panel Technical Information...
  • Page 5 Service Manual A4 panel Outdoor Unit GWH18MC-K3DNE3G/O GWH24MD-K3DNE3G/O Remote Controller YT1F(MOTO) MODE I F EEL TIMER CLOCK X-FAN TEMP TIMER TURBO SLEEP LIGHT Technical Information...

  • Page 6: Specifications

    Service Manual 2. Specifications 2.1 Specification Sheet 1.GWH18MC-K3DNE3G 2.GWH18MC-K3DNC9G 3.GWH18MC-K3DND3G 4.GWH18MC-K3DNA2G 5.GWH18MC-K3DNA3G 6.GWH18MC-K3DNA5G Model 7.GWH18MC-K3DNB3G 8.GWH18MC-K3DNA8G 9.GWH18MC-K3DNC2G 10.GWH18MC-K3DNC5G 11.GWH18MC-K3DNB7G 1.CB404003400 2.CB145005900 3.CB405004300 4.CB181007500 5.CB171011700 6.CB180001400 Product Code 7.CB163006800 8.CB173005900 9.CB180001500 10.CB179003800 11.CB164002900 Rated Voltage 220-240 Power Rated Frequency Supply Phases...
  • Page 7 Service Manual Coil Length (LXDXW) 715X25.4X304.8 Swing Motor Model MP28VB Output of Swing Motor Fuse 3.15 Sound Pressure Level (SH/H/M/L/SL) dB (A) 48/43/40/35/- Sound Power Level (SH/H/M/L/SL) dB (A) 58/53/50/45/- Dimension (WXHXD) 940X298X200 Dimension of Carton Box (LXWXH) 1010X380X285 Dimension of Package (LXWXH) 1013X383X300 Net Weight Gross Weight...
  • Page 8 Service Manual Model of Outdoor Unit GWH18MC-K3DNE3G/O Product Code of Outdoor Unit CB404W03400 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD QXA-B141zF030A Compressor Model Compressor Oil 68EP Compressor Type Rotary L.R.A. Compressor RLA Compressor Power Input 1440 Overload Protector 1NT11L-6233 or KSD115 C or HPC115/95U1 Throttling Method Capillary...
  • Page 9 Service Manual 1.GWH18MC-K3DNC9G 2.GWH18MC-K3DNE3G 3.GWH18MC-K3DNB3G Model 4.GWH18MC-K3DNA2G 5.GWH18MC-K3DNC1G 6.GWH18MC-K3DNA4G 1.CB145005902 2.CB404003401 3.CB163006801 Product Code 4.CB181007502 5.CB139005801 6.CB161007601 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode outdoor Cooling Capacity(Min~Max) 5275(1260~6600) Heating Capacity(Min~Max) 5800(1120~6800) Cooling Power Input(Min~Max) 1625(380~2650) Heating Power Input(Min~Max) 1760(350~2650) Cooling Power Current Heating Power Current...
  • Page 10 Service Manual Model of Outdoor Unit GWH18MC-K3DNE3G/O Product Code of Outdoor Unit CB404W03401 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD QXA-B141zF030A Compressor Model Compressor Oil 68EP Compressor Type Rotary L.R.A. Compressor RLA Compressor Power Input 1440 Overload Protector 1NT11L-6233 or KSD115 C or HPC115/95U1 Throttling Method Capillary...
  • Page 11 Service Manual 1.GWH24MD-K3DNC9G 2.GWH24MD-K3DNE3G 3.GWH24MD-K3DNA2G Model 4.GWH24MD-K3DNA4G 5.GWH24MD-K3DNC1G 1.CB145005802 2.CB404003801 3.CB181007601 Product Code 4.CB161008001 5.CB139005901 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode outdoor Cooling Capacity(Min~Max) 6450(2530~6800) Heating Capacity(Min~Max) 7000(2530~7600) Cooling Power Input(Min~Max) 2180(600~2650) Heating Power Input(Min~Max) 2220(600~2800) Cooling Power Current Heating Power Current...
  • Page 12 Service Manual Model of Outdoor Unit GWH24MD-K3DNE3G/O Product Code of Outdoor Unit CB404W03801 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD QXA-B141zF030A Compressor Model Compressor Oil 68EP Compressor Type Rotary L.R.A. Compressor RLA Compressor Power Input 1440 Overload Protector 1NT11L-6233 or KSD115 C or HPC115/95U1 Throttling Method Capillary...
  • Page 13 Service Manual 1.GWH24MD-K3DNE3G 2.GWH24MD-K3DNA2G 3.GWH24MD-K3DNA3G 4.GWH24MD-K3DNA5G 5.GWH24MD-K3DNB3G 6.GWH24MD-K3DNC9G Model 7.GWH24MD-K3DND3G 8.GWH24MD-K3DNA5G 9.GWH24MD-K3DNA8G 10.GWH24MD-K3DNC5G 11.GWH24MD-K3DNC2G 12.GWH24MD-K3DNA4G 1.CB404003800 2.CB181007600 3.CB171011500 4.CB162010100 5.CB163006900 6.CB145005800 Product Code 7.CB405004200 8.CB162010102 9.CB173006200 10.CB179003900 11.CB180001800 12.CB161008000 Rated Voltage 220-240 Power Rated Frequency Supply Phases Power Supply Mode outdoor Cooling Capacity(Min~Max) 6450(2530~6800)
  • Page 14 Service Manual 1.GWH24MD-K3DNE3G/I 2.GWH24MD-K3DNA2G/I 3.GWH24MD-K3DNA3G/I 4.GWH24MD-K3DNA5G/I 5.GWH24MD-K3DNB3G/I 6.GWH24MD-K3DNC9G/I Model of indoor unit 7.GWH24MD-K3DND3G/I 8.GWH24MD-K3DNA5G/I 9.GWH24MD-K3DNA8G/I 10.GWH24MD-K3DNC5G/I 11.GWH24MD-K3DNC2G/I 12.GWH24MD-K3DNA4G/I 1.CB404N03800 2.CB181N07600 3.CB171N11500 4.CB162N10100 5.CB163N06900 6.CB145N05800 Product Code of Indoor Unit 7.CB405N04200 8.CB162N10102 9.CB173N06200 10.CB179N03900 11.CB180N01800 12.CB161N08000 Fan Type Cross-flow Diameter Length(DXL) Φ100X765 Fan Motor Cooling Speed (SH/H/M/ r/min...
  • Page 15 Service Manual Model of Outdoor Unit GWH24MD-K3DNE3G/O Product Code of Outdoor Unit CB404W03800 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO.,LTD QXA-B141zF030A Compressor Model Compressor Oil 68EP Compressor Type Rotary L.R.A. Compressor RLA Compressor Power Input 1440 Overload Protector 1NT11L-6233 or KSD115 C or HPC115/95U1 Throttling Method Capillary...

  • Page 16: Operation Characteristic Curve

    Service Manual 2.2 Operation Characteristic Curve Cooling Heating 220V Conditions 220V Indoor: DB27°C/WB19°C Outdoor: DB35°C/WB24°C Indoor air flow: High Pipe length: 5m 230V 230V 240V Conditions Indoor: DB20°C/WB15°C 240V Outdoor: DB7°C/WB6°C Indoor air flow: High Pipe length: 5m 10 20 30 40 50 60 70 80 90 100 Compressor speed (rps) Compressor speed (rps) 2.3 Capacity Variation Ratio According to Temperature...

  • Page 17: 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 Compressor temperature of heat Fan speed of Fan speed of condition( connecting indoor and frequency Model outdoor unit exchanger indoor unit outdoor unit...

  • Page 18: Outline Dimension Diagram

    Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit Φ55 Φ55 Φ70 Φ70 Models 1007 Unit:mm Technical Information...

  • Page 19: Outdoor Unit

    Service Manual 3.2 Outdoor Unit 1000 Unit:mm Technical Information...

  • Page 20: Refrigerant System Diagram

    Service Manual 4. Refrigerant System Diagram Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction Accumlator exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Capillary Strainer COOLING HEATING Connection pipe specification: Liquid pipe:1/4"...

  • Page 21: Electrical Part

    Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. ● Indoor Unit GWH18MC-K3DNE3G/I(CB404N03400) GWH18MC-K3DNA2G/I GWH18MC-K3DNA3G/I GWH18MC-K3DNA5G/I GWH18MC-K3DNB3G/I(CB163N06800) GWH18MC-K3DNC9G/I GWH18MC-K3DND3G/I GWH18MC-K3DNA8G/I GWH18MC-K3DNC2G/I GWH18MC-K3DNC5G/I GWH18MC-K3DNB7G/I TUBE TEMP. ROOM TEMP. SENSOR SENSOR...
  • Page 22 Service Manual GWH18MC-K3DNE3G/I(CB404N03401) GWH18MC-K3DNB3G/I(CB163N06801) GWH18MC-K3DNA4G/I TUBE TEMP. ROOM TEMP. SENSOR SENSOR FAN MOTOR TERMINAL TUBE ROOM BLOCK N(1) COM-OUT PRINTED CIRCUIT BOARD JUMP L(AC-L) YEGN (SWING) DISP1 DISP2 SWING-UD HEALTH-N HEALTH-L YEGN EVAPORATOR COLD PLASMA GENERATOR RECEIVER AND SWING DISPLAY BOARD MOTOR GWH24MD-K3DNE3G/I GWH24MD-K3DNA5G/I GWH24MD-K3DNA4G/I GWH24MD-K3DNC1G/I GWH24MD-K3DNA4G/I TUBE TEMP.
  • Page 23 Service Manual GWH24MD-K3DNA2G/I GWH24MD-K3DNA3G/I GWH24MD-K3DNB3G/I GWH24MD-K3DNC9G/I GWH24MD-K3DND3G/I GWH24MD-K3DNA5G/I GWH24MD-K3DNA8G/I GWH24MD-K3DNC5G/I GWH24MD-K3DNC2G/I GWH24MD-K3DNA4G/I Technical Information...
  • Page 24 Service Manual ● Outdoor Unit GWH18MC-K3DNE3G/O(CB404W03400) GWH24MD-K3DNE3G/O (CB404W03800) OVERLOAD PROTECTOR WARNING Please don't touch any terminal COMP. when the voltage of terminal YEGN P(DC+) and N(DC-) at AP1 is WH WH COMP higher than 30V to prevent the MAGNETIC risk of electric shock ! RING BU YE YEGN...

  • Page 25: Pcb Printed Diagram

    Service Manual 5.2 PCB Printed Diagram Indoor Unit ● Top view Name Interface of health function neutral wire Interface of live wire Interface of neutral wire Capacitor of fan motor Fuse Interface of PG motor Interface of health function live wire Auto button Up &...
  • Page 26 Service Manual Outdoor Unit ● Top view Name Terminal of compressor overload protection Terminal of temperature sensor Terminal of electronic expansion valve 4 Terminal of outdoor fan 5 Terminal of 4-way valve Terminal of compressorelectric heating Terminal of chassis electric heating Terminal of indoor unit and outdoor unit communication...

  • Page 27: Function And Control

    Service Manual 6. Function and Control 6.1 Remote Controller Introduction Buttons on Remote Controller ON/OFF button +/- button FAN button MODE button I FEEL button button button CLOCK button TIMER ON/TIMER OFF button button X-FAN button (Note:X-FAN is the same with BLOW) TEMP button TURBO button SLEEP button...
  • Page 28 Service Manual 2. "+" or "-" button ● Press “+” or “-“ button once increase or decrease set temperature 1°C.Holding "+" or "-" button, 2s later, set temperature on remote controller will change quickly. On releasing button after setting is finished, temperature indicator on indoor unit will change accordingly. (Temperature can’t be adjusted under auto mode) ●...
  • Page 29 Service Manual ● After starting up TIMER ON or TIMER OFF, set the constant circulating valid. After that, air conditioner will be turned on or turned off according to setting time. ON/OFF button has no effect on setting. If you don’t need this function, please use remote controller to cancel it. button Press this button can select up&down swing angle.
  • Page 30 Service Manual Replacement of Batteries in Remote Controller 1.Press the back side of remote controller marked with“ ”as shown in the fig, and then push out the cover of battery box along the arrow direction. 2. Replace two 7# (AAA 1.5V) dry batteries, and make sure the position of “+” polar and “-“ polar are correct. 3.

  • Page 31: Brief Description Of Modes And Functions

    Service Manual 6.2 Brief Description of Modes and Functions Indoor Unit 1.Basic function of system (1)Cooling mode 1.Under this mode, fan motor, swing will work under setting status, the temp. range is 16-30ºC(61-86 Fahrenheit scale) 2.Outdoor unit malfunction or unit stop running, indoor unit will keep original running status, malfunction displayed. 3.When0 (Tset-Tamb.), if indoor fan motor is high speed, that the fanmotorist running in middle speed, the middle speed or low speed will be maintained;(this condition should be executed when compressor ressor statr up);...
  • Page 32 Service Manual ●Display of operation patterns and mode patterns When the unit is powered on, all patterns will be displayed and the standby operation indicator will become red. When the unit is turned on through a remote controller, the operation indicator is light. At the same time, operating mode patterns (mode indicators include cooling, heating and dehumidification modes) set currently are displayed, and dynamic display patterns of wind speed are displayed.
  • Page 33 Service Manual (4) Sleep function In this mode, the unit will automatically select appropriate sleep curve to operate according to different set temperature. 1. If sleep function is set in cooling, the system will increase set temperature automatically for operation in a certain degree. 2.
  • Page 34 Service Manual 3. Protecting Treatments of Thermo-bulb: When the thermobulb is detected to be short-circuited continuously for 5 seconds: It is regarded that the temperature detected by the thermo-bulb is over-high (or unlimited), then the whole machine will exert corresponding safety stops according to the over-high temperature sensed by the thermo-bulb, and display corresponding temperature safety stops and faults of the thermo-bulb simultaneously.
  • Page 35 Service Manual 2. Temperature setting range ≥ [T ], the temperature can be set at: 16~30ºC (Cooling at room temperature); outdoor ambient temperature low-temperature cooling temperature (1) If T < [T ], the temperature can be set at: 25~30ºC (Cooling at low temperature), that is, the outdoor ambient temperature low-temperature cooling temperature (2) If T...
  • Page 36 Service Manual extend 1 minute, the outer fans will stop (During the period in the 1 minute, the air flow of outer fans can be changed according to the outdoor ambient temperature changes); When running with force, the outdoor fans shall run in the highest air flow. (3) 4-way valve control 1.
  • Page 37 Service Manual 4. Reducing frequency at high speed and stop machine: If [T ]≤T ], you should adjust the compressor frequency Cooling overload frequency reducing temperature at high speed outer pipe Cooling overload power turn-off temperature by reducing 30Hz/90s till the lower limit; After it was running 90s at the lower limit, if [T ] ≤[T Cooling overload frequency reducing temperature at normal speed , then Cooling overload protects machine stopping;...
  • Page 38 Service Manual 4. Reducing frequency at high speed and power turn-off: If [T ]≤T <[T ] you should adjust the compressor frequency by reducing 30Hz/90s frequency reducing temperature at high speed of module Module Power turn-off temperature of module till the lower limit; After it was running 90s at the lower limit, if [T ] ≤T , you should stop the machine frequency reducing temperature at normal speed of module...
  • Page 39 Service Manual 3.To detect voltage abnormity protect for DC bus when getting electricity: If it found the DC bus voltage U >[U ], turn off the relay at once, and shows voltage abnormity failure for DC Bus. And the DC-Over-High Voltage failure can’t recover except to break off and get the electricity.

  • Page 40: 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 41 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.

  • Page 42: Installation

    Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the wall Space to the wall At least 15cm At least 15cm Drainage pipe Installation and Maintenance...
  • Page 43 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 44: Installation Parts-Checking

    Service Manual 8.2 Installation Parts-checking 8.4 Electric Connection Requirement Name Name 1. Safety Precaution Indoor unit Sealing gum (1) Must follow the electric safety regulations when installing Outdoor unit Wrapping tape the unit. Support of outdoor (2) According to the local safety regulations, use qualified Connection pipe unit power supply circuit and air switch.
  • Page 45 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 46 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 Screw...

  • Page 47: Installation Of Outdoor Unit

    Service Manual Refer to the following table for wrench moment of force: 8.6 Installation of Outdoor Unit Hex nut diameter(mm) Tightening torque(N . m) Φ6 1. Fix the Support of Outdoor Unit(Select it according to 15~20 Φ9.52 the actual installation situation) 30~40 Φ12 (1) Select installation location according to the house structure.

  • Page 48: Vacuum Pumping And Leak Detection

    Service Manual (3) The water outlet can't be placed in water in order to drain 8.8 Check after Installation and Test smoothly.(As show in Fig.27) Operation 1. Check after Installation Check according to the following requirement after finishing installation. The drain hose can't be fluctuant Items to be checked Possible malfunction Has the unit been...

  • Page 49: Maintenance

    Service Manual 9. Maintenance 9.1 Malfunction Display of Indoor Unit 1. Malfunction display requirement When there are several malfunctions, they will be displayed circularly. 2. Malfunction display method (1) Hardware malfunction: immediate display; refer to “malfunction display table”; (2) Operation state: immediate display; refer to “malfunction display table”; (3) Other malfunctions: it is displayed after the compressor stops for 200s;...
  • Page 50 Service Manual ●Discharging method (1) remove the inverter cover(Outdoor Unit) Inverter cover P.C.board (Soldered surface) (2)As shown below,connect the discharge resistance(approx.100Ω20W)or plug of the sold ering iron to voltage between + - terminals of the electrolytic capacitor on PC Board for 30s, and then peformedischarging. NOTE: A large-capacity electrolytic capacitor is used in the outdoor unit controller(inverter).Therefore,if the power supply is turned off,charge(charging voltage DC280V to 380V)remains and disc harging takes a lot of time..

  • Page 51: Procedure Of Troubleshooting

    Service Manual 9.2 Procedure of Troubleshooting Indoot Unit (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 52 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? ●...
  • Page 53 Service Manual (3) Malfunction of Protection of Jumper Cap (C5) Main detection points: ● Is there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● The motor is broken? ●...
  • Page 54 Service Manual (4) Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor (U8) Main detection points: ● Instant energization afte de-energization while the capacitordischarges slowly? ● The zero-cross detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: Start Turn power off for 1minute,the turn...
  • Page 55 Service Manual (5) Communication malfunction (E6) Troubleshooting for E6 malfunction Disconnect power and check if the connection wire of indoor and outdoor units and the built-in wire of electric box are correctly connected. Connect the wire properly according Is malfunction Correct connection? to the wiring eliminated?
  • Page 56 Service Manual Outdoot Unit (1) Malfunction of Desynchronizing of Compressor (H7) Main check point: Whether the system pressure is too high? Whether the electronic expansion valve can work normally? Whether the radiation for the unit is in good condition? Check flow chart: Desynchronizing malfunction occurs after de-energizing and turning on the unit...
  • Page 57 Service Manual Desynchronizing malfunction occurs during operation process Check whether Whether the outdoor fan can the fan terminal is Replace fan capacitor operate normally? connected well Improve the radiation circumstances for the Whether the radiation for the unit (such as clean heat unit is in good condition? Replace outdoor fan exchanger, improve...
  • Page 58 Service Manual (2) Malfunction of Temperature Sensor (F3/F4/F5) Main check point: Whether the temperature sensor is damaged? Whether the terminal of temperature sensor is loose or not connected? Whether the main board is damaged? Check flow chart: Start the troubleshooting for temperature sensor Check the connection between temperature sensor and wiring...
  • Page 59 Service Manual (3) Malfunction of Overload Protection of Compressor (H3) and Discharge High-temperature Protection of Compressor (E4) Main check point: Whether the electronic expansion valve is connected well and whether it’s damaged? Whether the refrigerant is leaking? Whether the overload protector is damaged? Start Check flow chart: Whether the overload protector is...
  • Page 60 Service Manual (4) Charging Malfunction of Capacitor (PU) Main check point: Whether input power is normal? Main board is damaged. Check flow chart: Energize and turn on the unit; wait for 1 min Measure the voltage at both ends of big electrolytic capacitor with the DC notch of universal meter There is malfunction for the...
  • Page 61 Service Manual (5) Malfunction of Overload Protection (E8) Main check point: Whether the tube temperature sensor is normal? Whether the outdoor ambient temperature is within the normal range? Whether indoor fan and outdoor fan can operate normally? Whether radiation environment inside or outside the unit is good? Check flow chart: Start Replace the tube temperature...
  • Page 62 Service Manual (6) Malfunction of IPM Protection (H5) Main check point: Whether input voltage is within the normal range? Whether wires of compressor are connected reliably, tightly or correctly? Whether the resistance of compressor coil is normal? Whether the insulation between compressor coil and copper pipe is in good condition? Whether the unit is overloading? Whether the radiation for the unit is in good condition? Whether the volume of charged refrigerant is proper?
  • Page 63 Service Manual (7) Malfunction of PFC Protection (HC) Main check point: Whether power supply is normal? Check flow chart: Start Check whether power supply is normal Turn on the unit again after the power is Is power abnormal? resumed Replace main board of outdoor unit Installation and Maintenance...
  • Page 64 Service Manual (8) Malfunction of Communication (E6) Main check point: Check whether connection wires between indoor unit and outdoor unit and wiring inside the unit are connected well? Check the main board of indoor unit or main board of outdoor unit is damaged? Check flow chart: Communication malfunction De-energize the unit and then...
  • Page 65 Service Manual (9) Malfunction of Failure Start-up of Compressor (LC) Main check point: Whether the compressor wires are connected correctly? Whether the stop time for compressor is enough? Whether compressor is damaged? Whether the refrigerant-charging volume is superfluous? Check flow chart: Energize and turn on the unit Whether the stop time for...
  • Page 66 Service Manual (10) Malfunction of Overcurrent Protection (E5) Main detection points: ● Is the supply voltage unstable with big fluctuation? ● Is the supply voltage too low with overload? ● Hardware trouble? Malfunction diagnosis process: Start Normal fluctuation should be within 10 % Is malfunction Is the supply voltage unstable of the rated voltage on the nameplate...
  • Page 67 Service Manual (9) Other Malfunction 1.IPM module temperature sensor is open-circuited (P7) Hardware of main board is damaged. Please replace main board. 2.Overheating protection of IPM module (P8) ① Poor radiation because the module radiator is dirty; ② IPM module is damaged; ③...

  • Page 68: 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 69 Service Manual 4. Air Conditioner is Leaking Possible causes Discriminating method (air conditioner status) Troubleshooting Eliminate the foreign objects inside the drain Drain pipe is blocked Water leaking from indoor unit pipe Drain pipe is broken Water leaking from drain pipe Replace drain pipe Water leaking from the pipe connection place of Wrapping is not tight...

  • Page 70: Exploded View And Parts List

    Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit MODE I F EEL CLOCK TIMER X-FAN TEMP TIMER TURBO SLEEP LIGHT Installation and Maintenance...
  • Page 71 Service Manual Part Code Description GWH18MC-K3DNE3G/I GWH18MC-K3DNE3G/I Product Code CB404N03400 CB404N03401 Front Panel Assy 20012962 20012962 Display Board 30565144 30565144 Filter Sub-Assy 1112208901 1112208901 Screw Cover 242520172 242520172 Front Case Sub-Assy 2001281201 2001281201 Guide Louver 1051211501 1051211501 Air Louver 1 1051211601 1051211601 Air Louver 2...
  • Page 72 Service Manual Part Code Description GWH18MC-K3DNA3G/I GWH18MC-K3DNA5G/I Product Code CB171N11700 CB180N01400 Front Panel Assy 20012260 20012286 Display Board 30565038 30565093 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Front Case Sub-Assy 20022172 20022172 Guide Louver 10512115 10512115 Air Louver 1 10512116 10512116 Air Louver 2...
  • Page 73 Service Manual Part Code Description GWH18MC-K3DNB3G/I GWH18MC-K3DNB3G/I Product Code CB163N06800 CB163N06801 Front Panel Assy 20012467 20012467 Display Board 30565037 30565037 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Front Case Sub-Assy 20022205 20022205 Guide Louver 10512115 10512115 Air Louver 1 10512116 10512116 Air Louver 2...
  • Page 74 Service Manual Part Code Description GWH18MC-K3DNA2G/I GWH18MC-K3DNC9G/I Product Code CB181N07500 CB145N05900 Front Panel Assy 20012283 20012714 Display Board 30565039 30565108 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Front Case Sub-Assy 20022172 20022172 Guide Louver 10512115 10512115 Air Louver 1 10512116 10512116 Air Louver 2...
  • Page 75 Service Manual Part Code Description GWH18MC-K3DND3G/I GWH18MC-K3DNA8G/I Product Code CB405N04300 CB173N05900 Front Panel Assy 20012926 20012285 Display Board 30565145 3056504301 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Front Case Sub-Assy 20022205 20022205 Guide Louver 10512115 10512115 Air Louver 1 10512116 10512116 Air Louver 2...
  • Page 76 Service Manual Part Code Description GWH18MC-K3DNC5G/I GWH18MC-K3DNC2G/I Product Code CB179N03800 CB180N01500 Front Panel Assy 20012583 20012542 Display Board 3056504301 30565061 Filter Sub-Assy 1112208901 1112208901 Screw Cover 24252016 24252016 Front Case Sub-Assy 20022205 20022172 Guide Louver 10512115 10512115 Air Louver 1 10512116 10512116 Air Louver 2...
  • Page 77 Service Manual Part Code Description GWH18MC-K3DNC1G/I GWH18MC-K3DNB7G/I GWH18MC-K3DNA4G/I Product Code CB139N05800 CB164N02900 CB161N07600 Front Panel Assy 20012466 20012771 20012280 Display Board 30565088 3056506401 30565039 Filter Sub-Assy 1112208901 1112208901 1112208901 Screw Cover 24252016 24252016 24252016 Front Case Sub-Assy 20022205 20022205 20022172...
  • Page 78 Service Manual MODE I F EEL TIMER CLOCK X-FAN TEMP TIMER TURBO SLEEP LIGHT Installation and Maintenance...
  • Page 79 Service Manual Part Code Description GWH24MD-K3DNA2G/I GWH24MD-K3DNA2G/I Product Code CB181N07601 CB181N07600 Front Panel Assy 20012369 20012369 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 20012329 20012329 Air Louver 1 10512159 10512159 Helicoid Tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case assy...
  • Page 80 Service Manual Part Code Description GWH24MD-K3DNA5G/I GWH24MD-K3DNA3G/I Cold Plasma Product Code CB171N11500 CB162N10100 Front Panel Assy 20012328 20012368 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 20012329 20012329 Air Louver 1 10512159 10512159 Helicoid Tongue 26112187 26112187 Left Axile Bush 10512037 10512037...
  • Page 81 Service Manual Part Code Description GWH24MD-K3DNB3G/I GWH24MD-K3DNC9G/I Product Code CB163N06900 CB145N05800 Front Panel Assy 20012483 20012702 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 2001232905 20012329 Air Louver 1 10512159 10512159 Helicoid Tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case assy...
  • Page 82 Service Manual Part Code Description GWH24MD-K3DND3G/I GWH24MD-K3DNE3G/I Product Code CB405N04200 CB404N03800 Front Panel Assy 20012995 20022138 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 242520172 Front Case Assy 2001232905 20022105 Air Louver 1 10512159 1051215902 Helicoid Tongue 26112187 2611218701 Left Axile Bush 10512037 10512037 Rear Case assy...
  • Page 83 Service Manual Part Code Description GWH24MD-K3DNA5G/I GWH24MD-K3DNC5G/I Product Code CB162N10102 CB179N03900 Front Panel Assy 20012368 20012372 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 20012329 2001232905 Air Louver 1 10512159 10512159 Helicoid Tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case assy...
  • Page 84 Service Manual Part Code Description GWH24MD-K3DNC2G/I GWH24MD-K3DNA4G/I Product Code CB180N01800 CB161N08000 Front Panel Assy 2001236901 20012370 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 20012329 20012329 Air Louver 1 10512159 10512159 Helicoid Tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case assy...
  • Page 85 Service Manual Part Code Description GWH24MD-K3DNA4G/I GWH24MD-K3DNA8G/I Product Code CB161N08000 CB173N06200 Front Panel Assy 20012370 Filter Sub-Assy 11122091 Screw Cover 24252016 Front Case Assy 20012329 Air Louver 1 10512159 Helicoid Tongue 26112187 Left Axile Bush 10512037 Rear Case assy 00000100013 Rubber Plug (Water Tray) 76712012 Ring of Bearing...
  • Page 86 Service Manual Part Code Description GWH24MD-K3DNA8G/I GWH24MD-K3DNC1G/I Product Code CB173N06200 CB139N05900 Front Panel Assy 20012372 20012552 Filter Sub-Assy 11122091 11122091 Screw Cover 24252016 24252016 Front Case Assy 2001232905 2001232905 Air Louver 1 10512159 10512159 Helicoid Tongue 26112187 26112187 Left Axile Bush 10512037 10512037 Rear Case assy...

  • Page 87: Outdoor Unit

    Service Manual 10.2 Outdoor Unit GWH18MC-K3DNE3G/O 10 11 12 13 Installation and Maintenance...
  • Page 88 Service Manual Part Code Description GWH18MC-K3DNE3G/O Product Code CB404W03400 CB404W03401 Front Grill 22413025 22413025 Front Panel 01535013P 01535013P Electrical Heater (Chassis) 765100045 Drainage Connecter 06123401 06123401 Chassis Sub-assy 02803231P 02803270P Drainage hole Cap 06813401 06813401 Compressor and fittings 00105249G 00105249G Magnet Coil 4300040045 4300040045...
  • Page 89 Service Manual GWH24MD-K3DNE3G/O 9 10 11 12 13 14 15 Installation and Maintenance...
  • Page 90 Service Manual Part Code Description GWH24MD-K3DNE3G/O Product Code CB404W03800 CB404W03801 Front Grill 22413026 22413026 Cabinet 01435004P 01435004P Left Handle 26233053 26233053 Front Side Plate 01305086P 01305086P Drainage Connecter 06123401 06123401 Chassis Sub-assy 02803255P 0280325501P Drainage hole Cap 06813401 06813401 Gas-liquid Separator Assy 07225017 07225017 Compressor and Fittings...

  • Page 91: Removal Procedure

    Service Manual 11. Removal Procedure Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit Steps Procedure 1. Remove filter Open the panel.
  • Page 92 Service Manual Steps Procedure 3. Remove panel Panel Open the front panel; separate the panel Front 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 93 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 94 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. Screw Remove the screw fixing electric box assy and then remove the electric box assy.
  • Page 95 Service Manual Steps Procedure 9. Remove stepping motor Step 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 screw at the connection...

  • Page 96: Removal Procedure Of Outdoor Unit

    Service Manual 11.2 Removal Procedure of Outdoor Unit Electric heater band is not shown. Steps Procedure 1. Remove top panel Twist off the screws used for fixing the handle and v alve cover , pull the handle and v alve cover up ward to remove it.
  • Page 97 Service Manual Remove the 5 screws connecting the panel with the chassis and the motor support, and then remove the panel. Remove the 6 screws connecing the left side plate and right side plate and then remove rear grill rear grill panel 3.
  • Page 98 Service Manual 4. Remove fan motor axial flow blade Remove the nuts fixing the blade and then remove the axial flow blade. motor support Remove the 4 tappin g screw s fixing the motor; disconnect the leading wire insert of the motor and then remove the moto r.
  • Page 99 Service Manual 6.Remove soundproof sponge Since the piping ports on the soundproof sponge are torn easily, remove the soundproof sponge carefully soundproof sponge 7. Remove Isolation sheet Remove the 3 screws fixing the isolation sheet and then remove the Isolation sheet. Isolation sheet 8.
  • Page 100 Service Manual 9. Remov e compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. compressor 10.Remove condenser sub-assy capillary sub-assy support Remove the screws connecting the support (condenser) and condenser assy,and then remove the support(condenser). condenser sub-assy Remove the chassis sub-assy and condenser sub-assy.
  • Page 101 Service Manual Electric heater band is not shown. Steps Procedure 1. Remove top panel handle Twist off the screws used for fixing the handle and v alve cover , pull the handle and v alve cover up ward to remove it. valve cover top panel Remove the 3 screws connecting the top...
  • Page 102 Service Manual Remove the 5 screws connecting the panel with the chassis and the motor support, and then remove the panel. panel 3. Remove right side plate and left side plate right side plate Remove the scre ws connecting the right side plate with the chassis, the valve support and the electric box, and then remove the right side plate assy .
  • Page 103 Service Manual 4. Remove fan motor and axial flow blade axial flow blade Remove the nuts fixing the blade and then remove the axial flow blade. fan motor fixing frame Remove the 4 tapping screws fixing the motor; disconnect the leading wire insert of the motor and then remove the motor.
  • Page 104 Service Manual 4-way valv e assy 6.Remove soundproof sponge and Since the piping ports on the soundproof sponge are torn easily, remove the soundproof sponge carefully 4-way valv e assy Discharge the refrigerant completely;unsolder the pipelines connecting the compressor and the condenser assy,and then remove the 4-way valve assy.
  • Page 105 Service Manual 8. Remov e Cut off Valve and Valve Support Remove the 2 bolts fixing the valve subassemblies. Unsolder the welding joint connecting the gas valve and the return air pipe. Remove the gas valve. (Note: When unsoldering the soldering joint, wrap the gas valve with wet cloth completely to avoid damage to the valve caused by high temperature.) Unsolder the welding joint connecting the liquid valve...
  • Page 106 Service Manual condenser sub-assy 11.Remove condenser sub-assy Remove the chassis sub-assy and condenser sub-assy. chassis sub-assy Installation and Maintenance...

  • Page 107: 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 Fahrenheit Fahrenheit Fahrenheit display display display Celsius( Celsius( Celsius( temperature temperature temperature 60.8 69/70 69.8 78/79 78.8 62/63...

  • Page 108: 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 109: 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) C) Resistance(kΩ) C) Resistance(kΩ) Resistance(kΩ) Resistance(kΩ) 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...
  • Page 110 Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) C) Resistance(kΩ) C) Resistance(kΩ) Resistance(kΩ) Resistance(kΩ) 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...
  • Page 111 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor (50K) C) Resistance(kΩ) Resistance(kΩ) C) Resistance(kΩ) Resistance(kΩ) 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...
  • Page 112 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...

This manual is also suitable for:

Gwh18mc-k3dna3gGwh18mc-k3dna5gGwh18mc-k3dnb3gGwh18mc-k3dnc9gGwh18mc-k3dnd3gGwh18mc-k3dne3g ... Show all

Table of Contents