Gree GWH12QB-K3DNA6O Service Manual
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Gree GWH12QB-K3DNA6O Service Manual

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Change for Life

Service Manual

Models: GWH12QB-K3DNA5D(WIFI)
GWH12QB-K3DNC4D(WIFI)
GWH12QB-K3DNE2D(WIFI)
GWH12QB-K3DNA6D(WIFI)
GWH18QD-K3DNA5E(WIFI)
GWH18QD-K3DNA6E(WIFI)
GWH18QD-K3DNC4E(WIFI)
GWH18QD-K3DNE2E(WIFI)
(Refrigerant:R410A)
GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI

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Summary of Contents for Gree GWH12QB-K3DNA6O

  • Page 1: Service Manual

    Change for Life Service Manual Models: GWH12QB-K3DNA5D(WIFI) GWH12QB-K3DNC4D(WIFI) GWH12QB-K3DNE2D(WIFI) GWH12QB-K3DNA6D(WIFI) GWH18QD-K3DNA5E(WIFI) GWH18QD-K3DNA6E(WIFI) GWH18QD-K3DNC4E(WIFI) GWH18QD-K3DNE2E(WIFI) (Refrigerant:R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...

  • Page 2: Table Of Contents

    6. Function and Control ..................14 6.1 Remote Controller Introduction ..................14 6.2 Operation of Smart Control (Smart Phone, Tablet PC) For Gree ........18 6.3 Operation of Smart Control (Smart Phone, Tablet PC) ..........30 6.4 Brief Description of Modes and Functions ..............42 Part Ⅱ...

  • Page 3: Table Of Contents

    Service Manual 9. Maintenance ......................60 9.1 Error Code List .......................60 9.2 Troubleshooting for Main Malfunction ................71 9.3 Troubleshooting for Normal Malfunction .................85 10. Exploded View and Parts List ..............87 10.1 Indoor Unit ........................87 10.2 Outdoor Unit .........................95 11. Removal Procedure ..................97 11.1 Removal Procedure of Indoor Unit ................97 11.2 Removal Procedure of Outdoor Unit ................102...

  • Page 4: Part Ⅰ : Technical Information

    Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit A6 Panel A5 Panel E2 Panel C2 Panel Outdoor Unit GWH12QB-K3DNA6D/O GWH18QD-K3DNA6E/O Remote Controller YAN1F1 Technical Information...

  • Page 5: Specifications

    Service Manual 2. Specifications 2.1 Specification Sheet 1.GWH12QB-K3DNA6D 1.GWH18QD-K3DNA6E 2.GWH12QB-K3DNC4D 2.GWH18QD-K3DNA5E Model 3.GWH18QD-K3DNC4E 3.GWH12QB-K3DNE2D 4.GWH12QB-K3DNA5D 4.GWH18QD-K3DNE2E 1.CB427004702 CB427004703 1.CB427006400 CB427006401 2.CB444001502 2.CB425007100 Product Code 3.CB462000201 3.CB444002900 4.CB425007001 4.CB462000300 Rated Voltage 220-240 220-240 Power Rated Frequency Supply Phases Power Supply Mode Outdoor Outdoor Cooling Capacity(Min~Max)
  • Page 6 Service Manual Model of Outdoor Unit GWH12QB-K3DNA6D/O GWH18QD-K3DNA6E/O Product Code of Outdoor Unit CB427W04701 CB427W06400 Compressor Manufacturer/Trademark Zhuhai Landa Compressor Co.; Ltd. Zhuhai Landa Compressor Co.; Ltd. Compressor Model QXA-B102zE190 QXA-A091zE190 Compressor Oil RB68EP FVC68D or RB68EP Compressor Type Rotary Rotary L.R.A.

  • Page 7: 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 8: Cooling And Heating Data Sheet In Rated Frequency

    Service Manual 2.4 Cooling and Heating Data Sheet in Rated Frequency Cooling: Rated cooling Pressure of gas pipe Inlet and outlet pipe Compressor condition( connecting indoor and temperature of heat Fan speed of Fan speed of Model frequency (DB/WB) outdoor unit exchanger indoor unit outdoor unit...

  • Page 9: Outline Dimension Diagram

    Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit 168.5 159.5 Φ55 Φ55 Φ55 Φ55 Models Unit:mm Technical Information...

  • Page 10: Outdoor Unit

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

  • Page 11: Refrigerant System Diagram

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

  • Page 12: Electrical Part

    Service Manual 5. Electrical Part 5.1 Wiring Diagram ●Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name White Green Jumper cap Yellow 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. ●...
  • Page 13 Service Manual GWH12QB-K3DNC4D/I GWH12QB-K3DNE2D/I GWH18QD-K3DNC4E/I GWH18QD-K3DNE2E/I GWH12QB-K3DNA6D/I(CB427N04703) GWH18QD-K3DNA6E/I(CB427N06401) 6363222004 ● Outdoor Unit GWH12QB-K3DNA6D/O 63610000453 Technical Information...
  • Page 14 Service Manual GWH18QD-K3DNA6E/O 63610000467 These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit. Technical Information...

  • Page 15: Pcb Printed Diagram

    Service Manual 5.2 PCB Printed Diagram Indoor Unit ● Top view 1 Neutral wire terminal 2 Interface of health function neutral wire 3 Motor needle stand 4 Interface of health function live wire 5 Auto button 6 Up&down swing motor 7 Interface of up &...
  • Page 16 Service Manual Outdoor Unit ● Top view Name Reactor wiring terminal Compressor wiring terminal Terminal of outdoor unit temperature sensor Compressor overload protection terminal Terminal with indoor unit communication wire Terminal of power supply live wire terminal Terminal of power supply neutral wire Interface of earthing wire Terminal of outdoor fan 10 Interface of 4-way valve...

  • Page 17: Function And Control

    Service Manual 6. Function and Control 6.1 Remote Controller Introduction ON/OFF button MODE button WIFI FAN button SWING button TURBO button ▲/ button SLEEP button TEMP button I FEEL button LIGHT button CLOCK button TIMER ON / TIMER OFF button Introduction for icons on display screen Set fan speed I feel...
  • Page 18 Service Manual Press this button to turn on the unit. Press this button again to turn off the unit. Press this button to increase set temperature. Holding it down above 2 seconds rapidly increases set temperature. In AUTO mode, set temperature is not adjustable. HEAT AUTO COOL...
  • Page 19 Service Manual 12.TURBO button Combination “MODE” and “TURBO” buttons： About WIFI fuction Press "MODE" and "TURBO" button simultaneously to turn on or turn off WIFI function. When WIFI function is turned on, the " " icon will be displayed on remote controller; Long press "MODE" and "TURBO" buttons simultaneously for 10s, remote controller will send WIFI reset code and then the WIFI function will be turned on.
  • Page 20 Service Manual battery reinstall remove Cover of battery box Note: During operation, point the remote control signal sender at the receiving window on indoor unit. The distance between signal sender and receiving window should be no more than 8m, and there should be no obstacles between them. indoor unit during operation.

  • Page 21: Operation Of Smart Control (Smart Phone, Tablet Pc) For Gree

    Service Manual 6.2 Operation of Smart Control (Smart Phone, Tablet PC) For Gree Operation Instructions Download and install APP Scan the following QR code with your smart phone and download Wifi Smart. Install the App according to its guidance. When successfully installed, your smart phone homepage will show this icon...
  • Page 22 Service Manual NOTICE: Please select the encrypt mode "empty" if your wifi has been set without password. Functions introduction 1.User registration Purpose: To realize long-distance control Operation instruction: For the first time login, you have to register a new username. If you already have a username, skip the registration step and enter email address and password on the "Login Page"...
  • Page 23 Service Manual (4) If password is forgotten, you can reset the password with your email address. Tap "Forgot password" and enter the page "Forgot password". Tap "Get verification code" to get a email verification code. Enter a new password and tap "OK" to log in. 2.Personal settings Purpose: Set name (device name, preset name, etc.) and images (device image) in order to identify a user easily.
  • Page 24 Service Manual (2) Set preset name Step 1: Tap at the top right corner of the homepage "Device". Select "Add preset" and enter the page "Preset edit". Step 2: Choose the time. Tap "Name". As shown in the picture, its name is "baby room". For timer type, select "On". Then select the repeating days.
  • Page 25 Service Manual to increase or decrease temperature. Tap to change working mode. Tap to enter the page of fan speed adjustment. and go around the circle to adjust fan speed. Step 2: Advanced settings Tap to enter advanced settings. You may select "Air", "Dry", "Health", "Light", "Sleep" or "Energy saving".
  • Page 26 Service Manual Tap "Add scene" and edit the scene name, for example, "Back home". Add execution devices. to add commands. On the page "Select execution device", select the air conditioner named "babyroom". Then select "ON" or "OFF". Continue to select the next execution device as instructed above. Tap to set the interval.
  • Page 27 Service Manual (3) Preset includes single-device preset and multi-device preset Single-device preset: This can preset a certain device to be On/Off at a specific time. On the homepage "Device", take air conditioner "babyroom" as an example.Tap at the bottom of the page "babyroom". Then you will enter the page "Preset edit".
  • Page 28 Service Manual (4) Link(This function is applicable to partial of models) set in the master device, slave devices will execute commands to realize devices Select a master device. When the environment has satisfied the parameters as linkage. Step 1: Set the parameters of master device (Select master device, select environment parameters, select master device status). at the top right corner of the homepage "Home control".
  • Page 29 Service Manual Tap the days below "Repeat" to select the repeating days. Then tap "Save". Step 3: Select "Execute command" Tap "Execute command" and enter the page "Select device". Tap the name of device that you want to control. Tap "ON" or "OFF" and then tap "Save" to complete the linkage. Tap "Save"...
  • Page 30 Service Manual (5) Infrared control (only applicable to smart phone with infrared emitter). Function: Smart phone can be used as a remote controller. at the top right corner of the homepage "Device". Select "Infrared" and enter the page "Remote controller". Tap slide up to enter the page of advanced functions.
  • Page 31 Service Manual Step 2: Another smart phone to be imported. Tap the model name and wait for the download. (2) Backup: To keep backup of the quick configuration information and units information, including backup to cloud and backup list on the cloud.
  • Page 32 Service Manual (3) Settings User can set vibration, message alerts, server, updates, etc. The server setting here must keep the same as the server setting in "Configuration" mentioned before. Otherwise, remote control will be invalid. (4) Feedback User can feedback suggestions to back-stage management for maintenance and development. Tap "Feedback".

  • Page 33: Operation Of Smart Control (Smart Phone, Tablet Pc)

    Service Manual 6.3 Operation of Smart Control (Smart Phone, Tablet PC) Operation Instructions Download and install APP Scan the following QR code with your smart phone and download Wifi Smart. Install the App according to its guidance. When successfully installed, your smart phone homepage will show this icon Configuration Before operation, please finish the following configuration in order to realize Wifi control and the connection between air conditioner and intelligent device.
  • Page 34 Service Manual NOTICE: Please select the encrypt mode "empty" if your wifi has been set without password. Functions introduction 1.User registration Operation instruction: For the first time login, you have to register a new username. If you already have a username, skip the registration step and enter email address and password on the "Login Page"...
  • Page 35 Service Manual (4) If password is forgotten, you can reset the password with your email address. Tap "Forgot password" and enter the page "Forgot password". Tap "Get verification code" to get a email verification code. Enter a new password and tap "OK" to log in. 2.Personal settings Purpose: Set name (device name, preset name, etc.) and images (device image) in order to identify a user easily.
  • Page 36 Service Manual (2) Set preset name Step 1: Tap at the top right corner of the homepage "Device". Select "Add preset" and enter the page "Preset edit". Step 2: Choose the time. Tap "Name". As shown in the picture, its name is "baby room". For timer type, select "On". Then select the repeating days.
  • Page 37 Service Manual to increase or decrease temperature. Tap to change working mode. Tap to enter the page of fan speed adjustment. and go around the circle to adjust fan speed. Step 2: Advanced settings Tap to enter advanced settings. You may select "Air", "Dry", "Health", "Light", "Sleep" or "Energy saving". (2) Advanced control functions: Set scene;...
  • Page 38 Service Manual Tap "Add scene" and edit the scene name, for example, "Back home". Add execution devices. to add commands. On the page "Select execution device", select the air conditioner named "babyroom". Then select "ON" or "OFF". Continue to select the next execution device as instructed above. Tap to set the interval.
  • Page 39 Service Manual Slide up and down to set the time. If you want to synchronize the time, tap " synchronize".If such "Hint" interface hasnt appeared, please skip this operation procedure. Tap "Name" to customize the preset name. Preset device cant be selected and it will default to "babyroom". Select "On" for the timer type. Select repeating days to complete the preset.
  • Page 40 Service Manual (4) Link(This function is applicable to partial of models) set in the master device, slave devices will execute commands to realize devices Select a master device. When the environment has satisfied the parameters as linkage. Step 1: Set the parameters of master device (Select master device, select environment parameters, select master device status). at the top right corner of the homepage "Device".
  • Page 41 Service Manual Tap the days below "Repeat" to select the repeating days. Then tap "Save". Step 3: Select "Execute command" Tap "Execute command" and enter the page "Select device". Tap the name of device that you want to control. Tap "ON" or "OFF" and then tap "Save" to complete the linkage. Technical Information...
  • Page 42 Service Manual Tap "Save" and then repeat the above steps to set linkage of several scenes. (5) Infrared control (only applicable to smart phone with infrared emitter). Function: Smart phone can be used as a r emote controller. at the top right corner of the homepage "Device". Select "Infrared" and enter the page "Remote controller". Tap and slide up to enter the page of advanced functions.
  • Page 43 Service Manual Step 2: Another smart phone to be imported. Tap the model name and wait for the download. (2) Backup: To keep backup of the quick configuration information and units information, including backup to cloud and backup list on the cloud.
  • Page 44 Service Manual Select "Backup list on the cloud". Then backup records will appear. Tap "Record" to download data and recover data to local unit. (3) Settings User can set vibration, message alerts, server, updates, etc. The server setting here must keep the same as the server setting in "Configuration"...

  • Page 45: Brief Description Of Modes And Functions

    Service Manual 6.4 Brief Description of Modes and Functions 1.Basic function of system (1)Cooling mode (1) Under this mode, fan and swing operates at setting status. Temperature setting range is 16~30 (2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status. (2)Drying mode (1) Under this mode, fan operates at low speed and swing operates at setting status.
  • Page 46 Service Manual (8)I feel control mode After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient temperature sent by remote controller. (9)Compulsory defrosting function (1) Start up compulsory defrosting function Under ON status, set heating mode with remote controller and adjust the temperature to 16 C.

  • Page 47: Outdoor Units

    Service Manual Outdoor Units 1. Input Parameter Compensation and Calibration (1) Check the ambient temperature compensation function Indoor ambient temperature compensation function. a. In cooling mode, the indoor ambient temperature participating in computing control = (T – ⊿ T indoor ambient temperature cooling indoor ambient temperature compensation b.
  • Page 48 Service Manual 3. Special Functions Defrosting Control ① Conditions for starting defrosting After the time for defrosting is judged to be satisfied, if the temperature for defrosting is satisfied after detections for continuous 3minutes, the defrosting operation will start. ② Conditions of finishing defrosting The defrosting operation can exit when any of the conditions below is satisfied: ③...
  • Page 49 Service Manual 1. Starting estimation: After the compressor stopped working for 180s, if T > [T (the temperature of hysteresis is 2 )], the inner pipe frozen-preventing frequency-limited temperature machine is only allowed to start for operating, otherwise it should not be started, and should be stopped to treat according to the frozen- preventing protection: Clear the trouble under the mode of power turn-off / heating, and the protection times are not counted.
  • Page 50 Service Manual 1. Frequency limited If [T ]≤T <[T ] , you should limit the frequency raising of heating overload frequency-limited temperature inner pipe heating overload frequency reducing temperature at normal speed compressor. 2. Reducing frequency at normal speed and stopping machine: If T[ ]≤T <[T...
  • Page 51 Service Manual (6)Voltage sag protection After start the compressor, if the time of DC link Voltage sag [U ] is measured to be less than t Voltage sag protection time , Sagging protection voltage the machine should be stop at once, hand on the voltage sag trouble, reboot automatically after 30 minutes. (7)Communication fault When you have not received any correct signal from the inner machine in three minutes, the machine will stop for communication fault.
  • Page 52 Service Manual (12) Starting-up Failure Protection for Compressor Stop the compressor after its starting-up fails, restart it after 20s if the fault doesnt shows, and if they are all failing for the successive start 3 times, it shall be reported as Starting-up Failure, and then restart up it after 3 min. When it still not be able to operate through carry out the above process for 5 times, it is available if press ON/OFF.
  • Page 53 Service Manual 6. Electric Heating Function of Chassis (1) When T ≤0ºC, the electric heating of chassis will operate; outdoor amb. (2) When T >2ºC, the electric heating of chassis will stop operation; outdoor amb. (3)When 0ºC<T ≤2ºC, the electric heating of chassis will keep original status. outdoor amb.

  • Page 54: 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 55 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 56: 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 57: 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 58: 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 59 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 60 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 61: Installation Of Outdoor Unit

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

  • Page 62: Vacuum Pumping And Leak Detection

    Service Manual (3) The water outlet cant 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 63: Maintenance

    Service Manual 9. Maintenance 9.1 Error Code List Display Method of Indoor Unit Indicator Display Display Malfunction (during blinking, ON of dual- A/C Status Possible Causes Countermeasures Name 0.5s and OFF 0.5s) 8 nixie Operation Heat tube Indicator Indicator Refrigerant is 1.
  • Page 64 Service Manual During cooling and drying High discharge See 9.3 (diagnosis of Flash operation, compressor and temperature overheating prevention Refer to maintenance 4 times outdoor fan stop while indoor protection of and overload flowchart every 3s fan operates. During heating compressor protection) operation, all loads stop.
  • Page 65 Service Manual Connection terminal between indoor ambient temperature sensor and main board is loose or poor connection. Theres short circuit due The unit will stop operation to trip-over of the parts as it reaches the temperature on main board; Indoor ambient point.
  • Page 66 Service Manual Feedback terminal of PG motor hasnt been inserted tightly. Control terminal of PG Indoor fan, outdoor fan, motor is not inserted Blockage Flash compressor and electric tightly. Refer to maintenance protection of 11 times heating tube all stop flowchart indoor unit every 3s...
  • Page 67 Service Manual During cooling and drying Malfunction of operation, compressor outdoor ambient and outdoor fan stop while temperature indoor fan operates. During sensor heating operation, all loads stop. During cooling and drying Malfunction 1.T-SENSOR terminal operation, compressor 1. After de-energization, of outdoor hasnt been inserted and outdoor fan stop while...
  • Page 68 Service Manual Overload; ambient 1. Reduce load; temperature is too high; Decrease Refrigerant is not All loads operates normally, 2. Add refrigerant frequency due enough while operation frequency of 3. Replace electronic to high air compressor decreases. Malfunction of electronic expansion valve →...
  • Page 69 Service Manual See 9.3 (diagnosis During cooling and drying of IPM protection, Overcurrent operation, compressor and desynchronizing Refer to maintenance protection of outdoor fan stop while indoor malfunction, overcurrent flowchart phase current fan operates. During heating protection of phase operation, all loads stop. current of compressor) Flash 21 Defrosting...
  • Page 70 Service Manual During cooling and drying Flash operation, compressor and See 9.3 (diagnosis of Refer to maintenance 25 PFC protection 6 times outdoor fan stop while indoor PFC protection) flowchart every 3s fan operates. During heating operation, all loads stop. See 9.3 (diagnosis During cooling and drying of IPM protection,...
  • Page 71 Service Manual 1. Check whether the Wrong match between capacity of indoor unit indoor unit and outdoor and outdoor unit is unit; matching with each other; During cooling and drying Flash operation, compressor and Hardware malfunction malfunction of 2. Replace indoor units 15 times outdoor fan stop while indoor of indoor units main...
  • Page 72 Service Manual During cooling and drying Drop Flash operation, compressor and Power voltage 1. Check whether malfunction 20 times outdoor fan stop while indoor is unstable, big power supply network is of DC busbar every 3s fan operates. During heating fluctuation.
  • Page 73 Service Manual During cooling and drying Zero-crossing operation, compressor and Hardware malfunction 1. Replace outdoor units malfunction of outdoor fan stop while indoor of outdoor units main main board AP1; outdoor unit fan operates. During heating board; operation, all loads stop. 1.

  • Page 74: Troubleshooting For Main Malfunction

    Service Manual 9.2 Troubleshooting for Main Malfunction Indoor 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 75 Service Manual 2. Malfunction of Blocked Protection of IDU Fan Motor H6 Main detection points: ● Is the control terminal of PG motor connected tightly? ● Is the feedback interface of PG motor connected tightly? ● The fan motor cant operate ？ ●...
  • Page 76 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? ● Detectioncircuit of the mainboard isdefined abnormal? Malfunction diagnosis process: Start Appearance of the...
  • Page 77 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 isdefined abnormal? Malfunction diagnosis process: Start Turn power off for 1minute,the turn back on...
  • Page 78 Service Manual Outdoor unit: 1. 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 79 Service Manual 2. 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 80 Service Manual 3. 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. Malfunction diagnosis process: E8 is displayed Normal protection, please...
  • Page 81 Service Manual 4. 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? Malfunction diagnosis process: Turn on the unit The stop time is not sufficient and...
  • Page 82 Service Manual 5. 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 83 Service Manual Start 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 84 Service Manual 6. PFC (correction for power factor) malfunction (outdoor unit malfunction (11) PFC (correction for power factor) malfunction (outdoor unit malfunction) Main detection points: Main detection points: ● Check if power plug is connected well with the socket? Check if power plug is connected well with the socket ●...
  • Page 85 Service Manual 7. Communication malfunction Main detection points: (12) Communication malfunction ● Check if the connection wire and the built-in wiring of indoor and outdoor unit are connected well and without damage; Main detection points: ● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) Check if the connection wire and the built-in wiring of indoor and outdoor unit are connected well and without damage;...
  • Page 86 Service Manual 8. Overload Protection Compressor H3 Main detection points: ● Heat exchange of unit is not good? (heat exchanger is dirty and unit radiating environment is bad) ● Fan motor is not working? ● Too much load of the system causes high temperature of compressor after working for a long time? ●...
  • Page 87 Service Manual 9. 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 88: Troubleshooting For Normal Malfunction

    Service Manual 9.3 Troubleshooting for Normal Malfunction 1. Air Conditioner Cant be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether its due to power failure. If yes, No power supply, or poor After energization, operation indicator isnt bright wait for power recovery.
  • Page 89 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 90: Exploded View And Parts List

    Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit GWH12QB-K3DNA6D/I GWH12QB-K3DNC4D/I GWH12QB-K3DNE2D/I GWH12QB-K3DNA5D/I The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 91 Service Manual Part Code Description GWH12QB-K3DNA6D/I Product Code CB427N04702 CB427N04703 Front Panel 2002269601S 2002269601S Filter Sub-Assy 11122219 11122219 Display Board 30565265 30565265 Front Case Assy 2002273001 2002273001 Guide Louver 1051276301 1051276301 Helicoid Tongue 26112508 26112508 Left Axile Bush 10512037 10512037 Rear Case assy 20162010 20162010...
  • Page 92 Service Manual Part Code Description GWH12QB-K3DNE2D/I GWH12QB-K3DNA5D/I Product Code CB462N00200 CB425N07001 Front Panel 200003000011S 2002267001 Filter Sub-Assy 11122219 11122219 Display Board 3056504301 30565260 Front Case Assy 00000200040 2002249501 Guide Louver 1051276301 1051272202 Helicoid Tongue 26112508 26112508 Left Axile Bush 10512037 10512037 Rear Case assy 20162010...
  • Page 93 Service Manual Part Code Description GWH12QB-K3DNC4D/I Product Code CB444N01502 Front Panel 20000300105S Filter Sub-Assy 11122219 Display Board 30565260 Front Case Assy 00000200040 Guide Louver 1051276301 Helicoid Tongue 26112508 Left Axile Bush 10512037 Rear Case assy 20162010 Drainage Hose 0523001408 Ring of Bearing 26152022 O-Gasket sub-assy of Bearing 7651205102...
  • Page 94 Service Manual GWH18QD-K3DNA6E/I GWH18QD-K3DNA5E/I GWH18QD-K3DNC4E/I GWH18QD-K3DNE2E/I The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 95 Service Manual Part Code Description GWH18QD-K3DNA6E/I Product Code CB427N06400 CB427N06401 Front Panel 2002269501S 2002269501S Display Board 30565264 30565264 Filter Sub-Assy 11122089 11122089 Decorative Board 2019267001 2019267001 Front Case 2002248401 2002248401 Guide Louver 1051276501 1051276501 Axile Bush 10542036 10542036 Air Louver(Manual) 10512732 10512732 Helicoid tongue...
  • Page 96 Service Manual Part Code Description GWH18QD-K3DNC4E/I GWH18QD-K3DNE2E/I Product Code CB444N02900 CB462N00300 Front Panel 20000300106S 200003000021S Display Board 30565260 3056504301 Filter Sub-Assy 11122089 11122089 Decorative Board 00000200042 00000200042 Front Case 2002248401 2002248401 Guide Louver 1051276501 1051276501 Axile Bush 10542036 10542036 Air Louver(Manual) 10512732 10512732 Helicoid tongue...
  • Page 97 Service Manual Part Code Description GWH18QD-K3DNA5E/I Product Code CB425N07100 Front Panel 2002266901S01 Display Board 30565260 Filter Sub-Assy 11122089 Decorative Board 00000200023 Front Case 2002248401 Guide Louver 1051273402 Axile Bush 10542036 Air Louver(Manual) 10512732 Helicoid tongue 26112512 Left Axile Bush 10512037 Rear Case assy 22202571 Rubber Plug (Water Tray)
  • Page 98 Service Manual 10.2 Outdoor Unit GWH12QB-K3DNA6D/O GWH18QD-K3DNA6E/O 24 25 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 99 Service Manual Part Code Description GWH12QB-K3DNA6D/O GWH18QD-K3DNA6E/O Product Code CB427W04701 CB427W06400 Left Side Plate 01303200P 01303200P Fan Motor 15013085 15013085 Motor Support 01703136 01703136 Condenser Assy 01100200658 011002000015 Top Cover Sub-Assy 01253081 01253081 Rear Grill 01475014 01475014 Clapboard Sub-Assy 01233180 01233180 Compressor and Fittings 00103364...

  • Page 100: Removal Procedure

    Service Manual 11. Removal Procedure Caution: discharge the refrigerant completely before removal. 11.1 Removal Procedure of Indoor Unit Step Procedure 1. Remove fi lter assembly Front panel Open the front panel. Push the left fi lter and right fi lter until they are separate from the groove on the front panel.
  • Page 101 Service Manual 4. Remove electric box cover 2 and detecting plate(WIFI) Electric box cover 2 Remove the screws on the electric box Screw cover 2 and detecting plate(WIFI), then remove the electric box cover 2 and detecting plate(WIFI). Screws Detecting plate (WIFI) 5.Remove front case sub-assy Remove the screws fixing front case.
  • Page 102 Service Manual Step Procedure 7.Remove vertical louver Loosen the connection clasps between vertical louver and bottom case to remove vertion louver. Swing motor Screw off the screws that are locking the swing motor and take the motor off. 8.Remove electric box assy Loosen the connection clasps between shield cover of electric box sub-assy and electric box,and then remove the shield...
  • Page 103 Service Manual Step Procedure Rotate the electric box assy. Twist off the screws Rotate the electric box assy. Twist offthe that are locking the wire clip and loosen the Screws screwsthat are locking the wire clip and power cord. Remove the wiring terminal of loosen the power cord.
  • Page 104 Service Manual Step Procedure Adjust the position of conncetion pipe on evaporator up wards to remove it. 10.Remove motor and cross flow blade Remove the screws fixing motor clamp and then remove the motor clamp. ① Remove the screws at the connection place of cross flow blade and motor;...

  • Page 105: Removal Procedure Of Outdoor Unit

    Service Manual 11.2 Removal Procedure of Outdoor Unit Steps Procedure 1. Before disassembly 2. Remove big handle big handle big handle and then remove it. 3. Remove top cover top cover Remove connection screws connecting the top panel with the front panel and the right side plate, and then remove the top panel.
  • Page 106 Service Manual Steps Procedure 4. Remove grille Remove connection screws between the front grille and the front panel. Then remove the grille. grille 5. Remove front panel Remove connection screws connecting the front panel with the chassis and the motor support and then remove the front panel.
  • Page 107 Service Manual Steps Procedure 8. Remove motor and motor support motor support motor and disconnect the leading wire insert of the motor. Then remove the motor. motor motor support and lift the motor support to remove it. 9. Remove Electric Box Assy Electric Box Assy subassembly;...
  • Page 108 Service Manual Steps Procedure and unsolder the welding joint between the gas valve and the air-return pipe to remove the gas valve. (NOTE: Discharge the refrigerant completely before unsoldering; when unsoldering, wrap the gas valve with a wet cloth completely to avoid damage to the valve caused by high 4-way valve temperature).

  • Page 109: 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 60.8 69/70 69.8 78/79 78.8 62/63...

  • Page 110: 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 111: 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( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579 1.009...
  • Page 112 Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443 1.269 137.2...
  • Page 113 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor (50K) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35 15.17 4.08...
  • Page 114 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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