Gree GWH18TC-S3DNA1D Service Manual
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Gree GWH18TC-S3DNA1D Service Manual

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Change for Life
Service Manual
Models: GWH18TC-S3DNA1D
GWH18TC-S3DNA2D
GWH24TD-S3DNA1D
(Refrigerant R410A)
GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI

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Summary of Contents for Gree GWH18TC-S3DNA1D

  • Page 1 Change for Life Service Manual Models: GWH18TC-S3DNA1D GWH18TC-S3DNA2D GWH24TD-S3DNA1D (Refrigerant R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...

  • Page 2: Table Of Contents

    6.1 Remote Controller Introduction ..................17 6.2 Operation of Smart Control (Smart Phone, Tablet PC) ..........23 6.3 Operation of Smart Control (Smart Phone, Tablet PC) For Gree ........34 6.4 Brief Description of Modes and Functions ..............45 Part Ⅱ : Installation and Maintenance ..........53...
  • Page 3 Service Manual 9. Maintenance ......................62 9.1 Flashing LED of Indoor/Outdoor Unit and Primary Judgement ........62 9.2 Procedure of Troubleshooting ..................65 9.3 Troubleshooting for Normal Malfunction .................82 10. Exploded View and Parts List ..............84 10.1 Indoor Unit ........................84 10.2 Outdoor Unit .........................89 11.

  • Page 4: Part Ⅰ : Technical Information

    Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit: GWH18TC-S3DNA1D/I GWH24TD-S3DNA1D/I GWH18TC-S3DNA2D/I Outdoor Unit: GWH18TC-S3DNA1D/O GWH24TD-S3DNA1D/O Remote Controller: YAC1FB Technical Information...

  • Page 5: Specifications

    Service Manual 2. Specifications 2.1 Specification Sheet Model GWH18TC-S3DNA1D GWH18TC-S3DNA2D CB148008603 Product Code CB148008605 CB411003103 CB148008604 Rated Voltage 220-240 220-240 Power Rated Frequency 50/60 50/60 Supply Phases Power Supply Mode Outdoor Outdoor Cooling Capacity (Min~Max) 5300(1000~6300) 5300(1000~6300) Heating Capacity (Min~Max)
  • Page 6 Service Manual Outdoor Unit Model GWH18TC-S3DNA1D/O Outdoor Unit Product Code CB148W08600 Compressor Manufacturer ZHUHAI LANDA COMPRESSOR CO.,LTD Compressor Model QXA-B141zF030A Compressor Oil 68EP Compressor Type Rotary Compressor LRA. Compressor RLA Compressor Power Input 1440 Compressor Overload Protector 1NT11L-6233 Throttling Method...
  • Page 7 Service Manual Model GWH24TD-S3DNA1D Product Code CB148008703 CB148008704 Rated Voltage 220-240 Power Rated Frequency 50/60 Supply Phases Power Supply Mode Outdoor Cooling Capacity (Min~Max) 7000(2000~8600) Heating Capacity (Min~Max) 7300(1900~9000) Cooling Power Input (Min~Max) 2000(450~3200) Heating Power Input (Min~Max) 1960(380~3200) Cooling Current Input Heating Current Input 9.63 Rated Input...
  • Page 8 Service Manual Outdoor Unit Model GWH24TD-S3DNA1C/O Outdoor Unit Product Code CB148W08700 Compressor Manufacturer ZHUHAI LANDA COMPRESSOR CO,LTD. Compressor Model QXAS-D23zX090A Compressor Oil FV50S Compressor Type Rotary Compressor LRA. Compressor RLA 11.5 Compressor Power Input 2550 Compressor Overload Protector 1NT11L-6233 Throttling Method Electron expansion valve Set Temperature Range °C...

  • Page 9: Operation Characteristic Curve

    Service Manual 2.2 Operation Characteristic Curve Cooling: Heating: • Conditions • Conditions Indoor: DB27°C/WB19°C Indoor: DB20°C/WB15°C Outdoor: DB35°C/WB24°C Outdoor: DB7°C/WB6°C Indoor air flow: High Indoor air flow: High Pipe length: 5m Pipe length: 5m 230V 230V Compressor Speed (rps) Compressor Speed (rps) 2.3 Capacity Variation Ratio According to Temperature Cooling: Heating:...

  • Page 10: Noise Curve

    Service Manual 2.4 Noise Curve Indoor side noise Outdoor side noise Heating Cooling Compressor frequency(Hz) Indoor fan motor rating speed 2.5 Cooling and Heating Data Sheet in Rated Frequency Cooling: Rated cooling Pressure of gas pipe Inlet and outlet pipe Compressor condition(°C) connecting indoor and...

  • Page 11: Outline Dimension Diagram

    Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit Φ70 Φ70 Φ70 Φ70 Unit:mm Model 1018 1178 Technical Information...

  • Page 12: Outdoor Unit

    Service Manual 3.2 Outdoor Unit GWH18TC-S3DNA1D/O Unit:mm GWH24TD-S3DNA1D/O Unit:mm Technical Information...

  • Page 13: 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 exchanger (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Electron Capillary Strainer Strainer expansion valve COOLING HEATING Connection pipe specification: Liquid pipe:1/4"...

  • Page 14: Electrical Part

    Violet Orange Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model. ● Indoor Unit GWH18TC-S3DNA1D/I GWH18TC-S3DNA2D/I WARNING Please don't touch any electronic component or terminal when the machine is running,stopping or has been powered...

  • Page 15: Printed Circuit Board

    UP-DOWN UP-DOWN 6361000023208 STEPPING STEPPING DEDUSTING GENERATOR WIFI MODULE MOTOR MOTOR ● Outdoor Unit GWH18TC-S3DNA1D/O WARNING OVERLOAD PROTECTOR Please don't touch any COMP. terminal when the voltage YEGN of terminal P(DC+) and COMP N(DC-) at AP1 is higher MAGNETIC than 30V to prevent the...
  • Page 16 Service Manual GWH24TD-S3DNA1D/O WARNING OVERLOAD PROTECTOR Please don't touch any electronic component or COMP. terminal when the machine is YEGN running , stopping or has COMP been powered off for less than 30 minutes to prevent MAGNETIC RT1 RT2 RT3 RING the risk of electric shock ! L2 L2...

  • Page 17: Pcb Printed Diagram

    Service Manual 5.2 PCB Printed Diagram Indoor Unit ● Top view 1 Grounding wire Interface of health function live wire Interface of health function neutral wire 4 Neutral wire 5 Interface of DC motor Interface of electrostatuc dedusting 7 Auto button 8 Up&down swing interface 1 9 eft&right swing interface 10 Up&down swing interface 2...
  • Page 18 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 19 Service Manual ● Top view Name Power supply neutral wire Power supply live wire Communication wire with indoor unit Terminal of outdoor temperature sensor Terminal of compressor overload protection Terminal of electronic expansion valve Terminal of outdoor fan Terminal of compressor electric heating Terminal of 4-way valve Terminal of compressor...

  • Page 20: Function And Control

    Service Manual 6. Function and Control 6.1 Remote Controller Introduction Buttons on Remote Controller ON/OFF button MODE button FAN button TURBO button ▲/ button button button SLEEP button I FEEL button TIMER ON / TIMER OFF button CLOCK button QUIET button(This function is unavailable for this model) X-FAN button LIGHT button...
  • Page 21 Service Manual 1. ON/OFF button Press this button can turn on or turn off the air conditioner. After turning on the air conditioner, operation indicator " "on indoor unit’s display is ON (green indicator. The colour is different for different models), and indoor unit will give out a sound. 2.
  • Page 22 Service Manual ● Under swing left and right mode, when the status is switched from off to , if press this button again 2s later, status will switch to off status directly; if press this button again within 2s, the change of swing status will also depend on the circulation sequence stated above. button Press this button can select up &...
  • Page 23 Service Manual ● TIMER OFF button "TIMER OFF" button can set the time for timer off. After pressing this button," "icon disappears and the word "OFF" on remote controller blinks. Press " ▲ " or " " button to adjust TIMER OFF setting. After each pressing " ▲ " or " "...

  • Page 24: Function Introduction For Combination Buttons

    Service Manual ● When selecting " " or no display with remote controller, temperature indicator on indoor unit displays set temperature. ● When selecting " " with remote controller, temperature indicator on indoor unit displays indoor ambient temperature. ● When selecting " "...

  • Page 25: Replacement Of Batteries In Remote Controller

    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 26: Operation Of Smart Control (Smart Phone, Tablet Pc)

    8 numbers of the air condtioner mac address. Password is 12345678. Step 2: Open Gree APP and the screen will show the air conditioner that you just connected. Click this air conditioner to enter and realize short-distance control, as shown below.
  • Page 27 Service Manual Please note: 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 28 Service Manual 2.Personal setting Purpose: Set name (device name, preset name, etc.) and images (device image) in order to identify a user easily. (1) Set device name After quick configuration, a list of controllable smart devices will be generated. Default name for air conditioner is "AC". Step 1: Tap and hold "babyroom"...
  • Page 29 Service Manual (3) Set device image Please refer to step 1 in 2(1) 3.Control functions (1) Common control functions: General control on the operation of smart devices (On/Off, temperature, fan speed, mode, etc.) and the setting of advanced functions (air exchange, dry, health, light, sleep, energy saving upper limit). Step 1: General control Enter the homepage "Home control"...
  • Page 30 Service Manual Step 2: Advanced settings Tap to enter advanced settings. You mayselect "Air", "Dry", "Health", "Light", "Sleep" or "Energy saving". (2) Advanced control functions: Set scene; Preset; Link: Infrared control (only applicable to smart phone with infrared emitter) Set scene: Preset the operation of several smart devices by one tap. On the page "Home control", tap the image of "Home control" to enter the page "Edit scene".
  • Page 31 Service Manual Continue to select the next execution device as instructed above. Tap to set the interval. Tap "Save". Tap the scene picture displaye d in "Home control" home page to send the command. Then the scene "Back home" will be in execution.
  • Page 32 Service Manual Tap "Name" to customize the preset name. Preset device can’t be selected and it will default to "babyroom". Select "On" for the timer type. Select repeating days to complete the preset. Multi-device preset: This can preset multiple devices to execute a command at a specific time. Please refer to the instructions as how to set preset time, name, timer type and repeating days for a single device.
  • Page 33 Service Manual Tap "Temperature" to enter the page "Select temperature parameter". Slide up or down to adjust temperature. Tap "Upper limit" or "Lower limit". Tap "Mode" and "On/Off" to select the status of master device. Then tap "Save". Step 2: Set time parameter for linkage. Tap "Time parameter" to enter the page "Set time". Slide rightwards to turn on the setting time.
  • Page 34 Service Manual Tap the name of device that you want to control. Tap "ON" or "OFF" and then tap "Save" to complete the linkage. 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.
  • Page 35 Service Manual to turn on the device. Tap t o select mode. Tap to adjust fan speed and swing angle. Tap "Health", "Energy saving", "Sleep" etc. to set advanced functions. Tap "Sleep" to enter the page "Sleep". You can select "Traditional sleep", "Expert sleep" or "DIY sleep". Tap "DIY sleep" and then tap the left and right arrows to set sleep time.
  • Page 36 Service Manual Tap "Backup to cloud" and then tap "Yes". Then wait for the data download. 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, gesture password (usable only after registration), etc.

  • Page 37: Operation Of Smart Control (Smart Phone, Tablet Pc) For Gree

    8 numbers of the air condtioner mac address. Password is 12345678. Step 2: Open Gree APP and the screen will show the air conditioner that you just connected. Click this air conditioner to enter and realize short-distance control, as shown below.
  • Page 38 Service Manual Please note: 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 39 Service Manual 2.Personal setting Purpose: Set name (device name, preset name, etc.) and images (device image) in order to identify a user easily. (1) Set device name After quick configuration, a list of controllable smart devices will be generated. Default name for air conditioner is "AC". Step 1: Tap and hold "babyroom"...
  • Page 40 Service Manual (3) Set device image Please refer to step 1 in 2(1) 3.Control functions (1) Common control functions: General control on the operation of smart devices (On/Off, temperature, fan speed, mode, etc.) and the setting of advanced functions (air exchange, dry, health, light, sleep, energy saving upper limit). Step 1: General control Enter the homepage ""Device"...
  • Page 41 Service Manual Step 2: Advanced settings Tap to enter advanced settings. You mayselect "Air", "Dry", "Health", "Light", "Sleep" or "Energy saving". (2) Advanced control functions: Set scene; Preset; Link: Infrared control (only applicable to smart phone with infrared emitter) Set scene: Preset the operation of several smart devices by one tap. On the page "Device", tap the image of "Device" to enter the page "Edit scene".
  • Page 42 Service Manual Continue to select the next execution device as instructed above. Tap to set the interval. Tap "Save". Tap the scene picture displaye d in "Home control" home page to send the command. Then the scene "Back home" will be in execution.
  • Page 43 Service Manual Tap "Name" to customize the preset name. Preset device can’t be selected and it will default to "babyroom". Select "On" for the timer type. Select repeating days to complete the preset. Multi-device preset: This can preset multiple devices to execute a command at a specific time. Please refer to the instructions as how to set preset time, name, timer type and repeating days for a single device.
  • Page 44 Service Manual Tap "Temperature" to enter the page "Select temperature parameter". Slide up or down to adjust temperature. Tap "Upper limit" or "Lower limit". Tap "Mode" and "On/Off" to select the status of master device. Then tap "Save". Step 2: Set time parameter for linkage. Tap "Time parameter" to enter the page "Set time". Slide rightwards to turn on the setting time.
  • Page 45 Service Manual Tap the name of device that you want to control. Tap "ON" or "OFF" and then tap "Save" to complete the linkage. 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.
  • Page 46 Service Manual to turn on the device. Tap to select mode. Tap to adjust fan speed . Tap "Health", "Energy saving", "Sleep" etc. to setadvanced functions. Tap "Sleep" to enter the page "Sleep". You can select "Traditional sleep", "Expert sleep" or "DIY sleep". Tap "DIY sleep" and then tap the left and right arrows to set sleep time.
  • Page 47 Service Manual Tap "Backup to cloud" and then tap "Yes". Then wait for the data download. 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, gesture password (usable only after registration), etc.

  • Page 48: Brief Description Of Modes And Functions

    Service Manual 6.4 Brief Description of Modes and Functions Indoor Unit ● 1.Temperature Parameters Indoor preset temperature (Tpreset) Indoor ambient temperature (Tamb.) 2.Basic functions (The temperature in this manual is expressed by Centigrade. If Fahrenheit is used, the switchover between them Tf=TcX1.8+32.) Once the compressor is energized, there should be a minimum interval of 3 minutes between two start-ups.
  • Page 49 Service Manual Start heating Tpreset +5 ˚C Previous running status Tpreset +2 ˚C Tamb. Start heating 6 min. 3 min. 6 min. Compressor Blow residual Outdoor unit Blow residual heat heat Indoor unit 2 min. 2 min. 4-way valve Stop ②...
  • Page 50 Service Manual ③ In this mode, TURBO can’t be set and fan speed can’t be adjusted. ④ In this mode, when compressor operates, fan speed will be adjusted as follows; when compressor stops operation, indoor unit will operate at blowing residual heat. When Tindoor amb.
  • Page 51 Service Manual Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep. (4)Sleep Function In this mode, the system will select proper sleep curve to operate according to different set temperature. ① If start up sleep function under cooling or drying mode, the system will increase set temperature automatically within a certain range to operate.
  • Page 52 Fan speed High Med. Mute Fan speed Service Manual function is set when starting up the unit, the horizontal louver will swing between O and D1.There are 7 swing status of horizontal louver: Positions O, A1, B1, C1 and D1, swing between O and D1 and stop at any position between L and D (angles between O and D1 are equiangular).
  • Page 53 Service Manual temperature display is set by remote controller, it will display set temperature; when room temperature display is set, it will display room or outdoor temperature. After that, when operating the remote controller for other settings, the temperature display method will keep original.
  • Page 54 Service Manual Outdoor Unit ● 1. Compensation function of input parameters According to the structure of wall-mounting unit, considering the comfortability for operation, indoor ambient temperature when the compressor is at OFF status is higher than set temperature under heating mode. 2.
  • Page 55 Service Manual 11.2 Under cooling or drying mode, if T <6, the operation frequency of compressor may increase or decrease; inner tube 11.2.1 If the unit is stopped because of freeze protection for 6 times successively, it can’t resume operation automatically and the malfunction will be displayed continuously, which can only be resumed by pressing ON/OFF button.

  • Page 56: 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 57 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 58: 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 59: 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 frame, drill wall holes (select it according to the actual situation) Connect pipes of indoor Fix outdoor unit...

  • Page 60: 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 61 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 62 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...

  • Page 63: 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 Hex nut diameter(mm) Tightening torque(N.m) the actual installation situation) Φ6 15~20 Φ9.52 30~40 (1) Select installation location according to the house structure.

  • Page 64: Vacuum Pumping And Leak Detection

    Service Manual 8.8 Check after Installation and Test (3) The water outlet can't be placed in water in order to drain 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 65: Maintenance

    Service Manual 9. Maintenance 9.1 Flashing LED of Indoor/Outdoor Unit and Primary Judgement Display Method of Outdoor Unit (Indicator has 3 kinds of display status and they will be displayed Dual-8 Malfunction circularly every 5s.) Code A/C status Possible Causes Name □OFF ■Illuminated Display...
  • Page 66 Service Manual Outdoor During cooling and drying condenser operation, compressor stops while Outdoor temperature sensor hasnt been connected temperature □ □ □ indoor fan will operate; During well or is damaged. Please check it by referring to the ☆ sensor is heating operation, the complete unit resistance table for temperature sensor) open/short...
  • Page 67 Service Manual During cooling and drying Malfunction operation, compressor will stop of module □ □ ■ while indoor fan will operate; Replace outdoor control panel AP1 ☆ temperature During heating operation, the sensor circuit complete unit will stop After the complete unit is de-energized for 20mins, During cooling operation, Module high check whether the thermal grease on IPM Module of...

  • Page 68: Procedure Of Troubleshooting

    Service Manual 9.2 Procedure of Troubleshooting ●Indoor unit: 1. Malfunction of Temperature Sensor F1, F2 Troubleshooting for F1,F2 malfunction the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? Insert the temperature sensor tightly Is malfunction eliminated Is there short circuit due to trip - over of the parts?

  • Page 69: Installation And Maintenance

    Service Manual 2. Malfunction of Blocked Protection of IDU Fan Motor H6 Start Turn the fan blades by hand under power-off condition Adjust the motor and blade Whether the fan blades assembly so that rotor can run can run smoothly? smoothly.
  • Page 70 Service Manual 3. Malfunction of Protection of Jumper Cap C5 Troubleshooting for C5 malfunction Appearance of Is there jumper cap on the the jumper cap mainboard ? Assemble the jumper cap with the same model Is malfunction eliminated the jumper cap inserted correctly and tightly ? Insert the...
  • Page 71 Service Manual 4. Communication malfunction E6 Start Cut off power supply. Check if connection line of IDU and ODU and the wire inside electric box are correctly connected. Connect the line Correct connection? according to Malfunction eliminated? wiring diagram. Main board matches Match correctly with display board? Main board of Malfunction eliminated?
  • Page 72 Service Manual 5. Malfunction of detecting plate(WIFI) JF 5. Malfunction of detecting plate(WIFI) JF Start check if the connection wire are correctly connected detecting Replace the plate with the same model Is malfunction eliminated Replace the mainboard with the same model The end Installation and Maintenance...
  • Page 73 Service Manual ●Outdoor unit: 1.Key detection point Test 3 Test 4 Test 1 Test 2 Test 5 Test 10 Test 9 Test 6 Test 7 Test 8 Test 13 Test 12 Test 11 Test 14 Installation and Maintenance...
  • Page 74 Service Manual Test value under normal Test No. Test point Corresponding component condition test 1 Between A and C Neutral wire and live wire AC 160V~265V test 2 Between B and C Neutral wire and live wire AC 160V~265V test 3 Between D and E DC busbar electrolytic capacitor DC 180V~380V...
  • Page 75 Service Manual 2.Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit) Main detection point: ● Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter; ● Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged? Malfunction diagnosis process: Turn on the unit and wait 1 minute...
  • Page 76 Service Manual 3.IPM protection, desynchronizing malfunction, phase current of compressor is overcurrent (AP1 below is control board of outdoor unit) Main detection point: ● If control board AP1 and compressor COMP is well connected? If they are loosened? If the connection sequence is correct? ●...
  • Page 77 Service Manual Energize and switch on Use AC voltmeter If the voltage Check the supply to measure the IPM protection between terminal L voltage and voltage between occurs after the and N on wiring terminal L and N machine has run for restore it to board XT is within a period of time?
  • Page 78 Service Manual 4.Diagnosis for anti-high temperature, overload protection (AP1 below is control board of outdoor unit) Main detection point: ● If the outdoor ambient temperature is in normal range; ● If the indoor and outdoor fan is running normal; ● If the radiating environment of indoor and outdoor unit is well. Malfunction diagnosis process: Anti-high temperature, overload protection...
  • Page 79 Service Manual 5.Diagnosis for failure start up malfunction (AP1 below is control board of outdoor unit) Main detection point: ● If the compressor wiring is correct? ● If the stop time of compressor is enough? ● If the compressor is damaged? ●...
  • Page 80 Service Manual 6. Diagnosis for compressor synchronism (AP1 below is control board of outdoor unit) Main detection point: ● If the system pressure is over-high? ● If the work voltage is over-low? Malfunction diagnosis process: Synchronism Synchronism after energize the unit occurred during and start it operation...
  • Page 81 Service Manual 7.Diagnosis for overload and discharge malfunction (AP1 below is control board of outdoor unit) Main detection point: ● If the electron expansion valve is connected well? Is the expansion valve damaged? ● If the refrigerant is leakage? ● If the overload protector is damaged? Malfunction diagnosis process: After the unit de-energized...
  • Page 82 Service Manual 8.PFC (correction for power factor) malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit) Main detection point: ● Check if reactor (L) of outdoor unit and PFC capacity are damaged. Malfunction diagnosis process: Start Check the connection wire of reactor (L) of outdoor unit and...
  • Page 83 Service Manual 9.Communication malfunction (AP1 below is control board of outdoor unit) Main detection point: ● Check if the connection wire and the built-in wiring of indoor and outdoor unit is connected well and no damaged; ● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is dam- aged Malfunction diagnosis process: Start...
  • Page 84 Service Manual 10.Diagnosis process for outdoor communication circuit Start Test voltage value with Test 10 position in diagram with voltage meter Number jumping Test voltage value with Test 13 position in diagram with voltage meter Number jumping Outdoor unit malfunction Test voltage value with Test 11 position in...

  • Page 85: Troubleshooting For Normal Malfunction

    Service Manual 9.3 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, N o p o w e r s u p p l y, o r p o o r After energization, operation indicator isn’t bright wait for power recovery.
  • Page 86 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...

  • Page 87: Exploded View And Parts List

    Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit (1)18K Unit The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 88 Service Manual Part Code Description GWH18TC-S3DNA1D/I Product Code CB148N08603 CB148N08604 Front Panel 20012820T 20012820T Display Board 30565141 30565141 Filter Sub-Assy 1112209105 1112209105 Screw Cover 24252016 24252016 Front Case 20012821 20012821 Guide Louver 10512225 1051222601 Guide Louver (small) 1051222601 1051222601 Helicoid Tongue...
  • Page 89 Service Manual Part Code Description GWH18TC-S3DNA1D/I GWH18TC-S3DNA2D/I Product Code CB148N08605 CB411N03103 Front Panel 20012820T 20022272T Display Board 30565141 30565209 Filter Sub-Assy 1112209105 1112209105 Screw Cover 24252016 242520179 Front Case 20012821 2001282101 Guide Louver 10512225 1051222501 Guide Louver (small) 1051222601 1051222601...
  • Page 90 Service Manual (2)24K Unit The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 91 Service Manual Part Code Description GWH24TD-S3DNA1D/I Product Code CB148N08703 CB148N08704 Front Panel 20012894K 20012894K Filter Sub-Assy 11122136 11122136 Screw Cover 242520053 242520053 Front Case Sub-assy 20022004 20022004 Guide Louver 10512236 10512236 Small Guide Louver 1051223701 1051223701 Swing Lever2 1058211601 1058211601 Air Louver 10512252 10512252...

  • Page 92: Outdoor Unit

    Service Manual 10.2 Outdoor Unit (1)18K The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 93 Service Manual Part Code Description GWH18TC-S3DNA1D/O Product Code CB148W08600 Front Grill 22415010 Front Panel 01535013P Axial Flow Fan 10335008 Fan Motor 1501506402 Electric Box Assy 10000100239 Main Board 30138000649 Terminal Board 420101943 Handle 26233053 Left Side Plate 01305093P Condenser Support Plate...
  • Page 94 Service Manual (2)24K 10 11 13 14 The component picture is only for reference; please refer to the actual product. Installation and Maintenance...
  • Page 95 Service Manual Part Code Description GWH24TD-S3DNA1D/O Product Code CB148W08700 Front Grill 22415011 Handle 26233053 Cabinet 01435004P Front Side Plate 01305086P Axial Flow Fan 10335014 Fan Motor 1501403402 Electric Box Assy 10000100250 Main Board 30138000647 Terminal Board 420101943 Handle 26233053 Left Side Plate 01305043P Coping 01255006...

  • Page 96: 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 11.1 Removal Procedure of Indoor Unit completely before removal. Steps Procedure 1. Before disassembling the unit Before disassembling the unit.
  • Page 97 Service Manual Steps Procedure Remove the rotating shaft of big guide louver from the groove, slightly bend thebig guide louver to remove it. big guide louver Remove the axial bushing of small guide louver. axial bushing Remove the rotating shaft of small guide louver from the groove, slightly bend the small guide louver to remove it.
  • Page 98 Service Manual Steps Procedure panel, to remove the display. 5.Remove front case detecting plate screw Remove the screw fixing detecting plate and remove the detecting plate. Note: The position of detection board（WIFI） may be different for different models. screw Remove the screw fixing electric box electric box cover2 cover2 and remove the electric box cover2.
  • Page 99 Service Manual Steps Procedure 6.Remove swing fan blade Loosen the clamps fixing swing connecting rod, to remove the swing connecting rod. clamp swing connecting rod clamp remove the swing fan blade. swing fan blade 7.Remove electric box sub-assy heat exchanger thermistor Remove the indoor tube temp.
  • Page 100 Service Manual Steps Procedure to remove the cover. electric box cover electric box cover sub-assy screw Remove every wiring terminals, and remove the electric box cover sub-assy. 8.Remove evaporator sub-assy auxiliary piping pipe clamp Remove the screws fixing connection pipe clamp, to remove the connection pipe clamp.
  • Page 101 Service Manual Steps Procedure auxiliary piping Remove the screws fixing evaporator sub-assy, slightly regulate the tube, to remove the evaporator sub-assy. evaporator sub-assy 9.Remove cross fan blade and motor motor, to remove the motor. up&down swing motor to remove the motor. left&right swing motor Installation and Maintenance...
  • Page 102 Service Manual Steps Procedure Remove the screws fixing motor clamp, to remove the motor clamp. screw motor clamp Remove the cross fan blade and motor. bearing cushion rubber base Remove the shafting bearing cushion rubber base cross fan blade motor blade and motor, and then remove the motor.
  • Page 103 Service Manual Steps Procedure Before disassembly of the unit Before disassembling the unit. 2. Remove filter panel Open the panel. air filter Loosen the clasps on filter, push the filter inward and then pull it upward, then the filter can be removed. hooks air filter Installation and Maintenance...
  • Page 104 Service Manual Steps Procedure 3. Remove the panel screw Remove the screws fixing display on the panel, to remove the display. display Along the groove fixing front panel, slide the rotor shaft outward to remove the front panel. panel Remove the panel. 4.
  • Page 105 Service Manual Steps Procedure 5. Remove Axial bush Remove the axial bush of horizontal louver to remove the axial bush. Axial sleeve hook Remove Axial bush Axial bush 6. Remove front case Remove the screw cover of front case, unscrew the 8 screws of front case with screwdriver.
  • Page 106 Service Manual Steps Procedure 7. Remove electric box temperature sensor Remove Temperature Sensor; Twist off the earthing screw fixing the evaporator. screw earth wire electric box cover 2 Remove the screw of electric box.Take out the electric box cover to separate the electric box cover 2.
  • Page 107 Service Manual Steps Procedure 8. Remove evaporator sub-assy water tray Loosen the clasps connecting the water tray and chassis, and then remove the water tray. Remove the screws fixing connection pipe clamp, to remove the connection pipe clamp. pipe clamp screw Remove the screws fixing evaporator sub-assy, slightly regulate the tube, to...
  • Page 108 Service Manual Steps Procedure srews srews Turn over the indoor unit and adjust the pipe line to the position as shown by the broken line. Lift up the evaporator, and then remove the evaporator. evaporator 9. Remove the cross-flow louver and motor Remove the 2 screws of step motor with screwdriver, and remove the step motor.
  • Page 109 Service Manual Steps Procedure Remove screws fixing cross flow blade and motor. Cross blow blade Fan motor Remove the motor sub-assy. Ring of Bearing Pull out the plug of ring of bearing. Installation and Maintenance...

  • Page 110: Removal Procedure Of Outdoor Unit

    Service Manual 11.2 Removal Procedure of Outdoor Unit GWH18TC-S3DNA1D/O 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 111 Service Manual Steps Procedure 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 112 Service Manual Steps Procedure 4. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the blade. axial flow fan motor support Remove the 6 screws fixing the motor and then remove the motor. Remove the 2 screws connecting the motor support and chassis, and then loosen the stopper to remove the motor support.
  • Page 113 Service Manual Steps Procedure 6. Remove the soundproof sponge Tear off the sticking stripe and then remove the soundproof sponge. soundproof sponge 7. Remove isolation plate Remove the 2 screws connecting the isolation plate and condenser side plate; remove the 3 screws connecting the isolation plate and chassis, and then remove the isolation plate.
  • Page 114 Service Manual Steps Procedure 9. Remove compressor compressor Remove the 3 foot nuts fixing compressor and then lift the compressor upwards to remove the compressor and damping cushion. Note: Keep the ports of discharge pipe and suction pipe from foreign objects. condenser sub-assy 10.
  • Page 115 Service Manual GWH24TD-S3DNA1D/O Steps Procedure 1. Remove top panel handle and 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 top panel panel with the front panel and the right side...
  • Page 116 Service Manual Steps Procedure 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 117 Service Manual Steps Procedure 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 118 Service Manual Steps Procedure 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 119 Service Manual Steps Procedure 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 120 Service Manual Steps Procedure condenser sub-assy 11.Remove condenser sub-assy Remove the chassis sub-assy and condenser sub-assy. chassis sub-assy Installation and Maintenance...

  • Page 121: 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 122: 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 123: 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 Units(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 124 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 125 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 4.08 580.6...
  • Page 126 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 For product improvement, specifications and appearance in this manual are subject to change without prior notice.

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