GREE ELECTRIC GWC18AC-D3DNA1B Service Manual
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GREE ELECTRIC GWC18AC-D3DNA1B Service Manual

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MODEL: GWC18AC-D3DNA1B
GWC24AC-D3DNA1B
GWH18AC-D3DNA1B
GWH24AC-D3DNA1B
GWH18AC-D3DNA2B
GWH24AC-D3DNA2B
(Refrigerant R410A)
GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI

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Summary of Contents for GREE ELECTRIC GWC18AC-D3DNA1B

  • Page 1: Service Manual

    Service Manual MODEL: GWC18AC-D3DNA1B GWC24AC-D3DNA1B GWH18AC-D3DNA1B GWH24AC-D3DNA1B GWH18AC-D3DNA2B GWH24AC-D3DNA2B (Refrigerant R410A) GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...

  • Page 2: Table Of Contents

    Table of Contents Summary and features ..................1 Part 1 Safety Precautions ..................2 Part 2 Specifications .....................3 2.1 Unit Specifications....................3 2.2 Operation Characteristic Curve................13 2.3 Capacity Variation Ratio According to Temperature..........14 2.4 Operation Data.....................14 2.5 Noise criteria curve tables for both models............15 Part 3 Construction Views ..................16 3.1 Indoor Unit ......................16...

  • Page 3: Summary And Features

    Summary and features Summary and features Indoor Unit GWC18AC-D3DNA1B/I GWC24AC-D3DNA1B/I GWH18AC-D3DNA1B/I GWH24AC-D3DNA1B/I GWH18AC-D3DNA2B/I GWH24AC-D3DNA2B/I Outdoor Unit GWC18AC-D3DNA1B/O GWH18AC-D3DNA1B/O GWC24AC-D3DNA1B/O GWH24AC-D3DNA1B/O Remote control window YT1FF MODE I FEEL TIMER CLOCK TIMER X-FAN TEMP TURBO SLEEP LIGHT...

  • Page 4: Part 1 Safety Precautions

    Safety Precautions 1.Safety Precautions Make sure the outdoor unit is installed on a stable, level Installing, starting up, and servicing air conditioner can be surface with no accumulation of snow, leaves, or trash hazardous due to system pressure, electrical components, and beside.

  • Page 5: Part 2 Specifications

    Specifications Specifications 2.1 Unit Specifications Model GWC18AC-D3DNA1B GWC24AC-D3DNA1B Product Code CB11500420 CB11500440 COOLING COOLING Function Rated Voltage(V) 208-230 208-230 Frequency(Hz) Total Capacity (W) Standard (Low~High) 5275(1820~6450) 6450(2300~7680) Total Capacity (Btu/h) Standard (Low~High) 18000(6200~22000) 22000(7800~26200) Power Input (W) Standard (Low~High) 1500(180~2650)
  • Page 6 Specifications Model of Outdoor Unit GWC18AC-D3DNA1B/O GWC24AC-D3DNA1B/O Product Code CB115W0420 CB115W0440 China Res ources (Shenyang) China Res ources (Shenyang) Com pres sor Manufacturer/tradem ark Sanyo CO.,LTD Sanyo CO.,LTD Com pres sor Model C-6RZ146H1A C-6RZ146H1A Com pres sor Type Twin rotary com pres sor Twin rotary com pres sor L.R.A.
  • Page 7 Specifications Model GWH18AC-D3DNA1B Product Code CB11500430 COOLING HEATING Function Rated Voltage(V) 208-230 Frequency(Hz) Total Capacity (W) Standard (Low~High) 5275(1820~6450) 7325(1200~7325) Total Capacity (Btu/h) Standard (Low~High) 18000(6200~22000) 25000(4100~25000) Power Input (W) Standard (Low~High) 1500(180~2650) 2700(240~2700) Rated Input (W) 2650 2700 Rated Current (A) 12.4 830/750/650/550 Air Flow Volum e (m...
  • Page 8 Specifications Model of Outdoor Unit GWH18AC-D3DNA1B/O Product Code CB115W0430 Com pres sor Manufacturer/tradem ark China Res ources (Shenyang) Sanyo CO.,LTD Com pres sor Model C-6RZ146H1A Com pres sor Type Twin rotary com pres sor L.R.A. (A) Com pres sor RLA(A) Com pres sor Power Input(W) 1640 Overload Protector...
  • Page 9 Specifications Model GWH18AC-D3DNA2B Product Code CB11500470 COOLING HEATING Function Rated Voltage(V) 208-230 Frequency(Hz) Total Capacity (W) Standard (Low~High) 5275(1820~6450) 7325(1200~7325) Total Capacity (Btu/h) Standard (Low~High) 18000(6200~22000) 25000(4100~25000) Power Input (W) Standard (Low~High) 1500(180~2650) 2700(240~2700) Rated Input (W) 2650 2700 Rated Current (A) 12.4 830/750/650/550 Air Flow Volum e (m...
  • Page 10 Specifications Model of Outdoor Unit GWH18AC-D3DNA1B/O Product Code CB115W0430 Com pres sor Manufacturer/tradem ark China Res ources (Shenyang) Sanyo CO.,LTD Com pres sor Model C-6RZ146H1A Com pres sor Type Twin rotary com pres sor L.R.A. (A) Com pres sor RLA(A) Com pres sor Power Input(W) 1640 Overload Protector...
  • Page 11 Specifications Model GWH24AC-D3DNA1B Product Code CB11500450 COOLING HEATING Function Rated Voltage(V) 208-230 Frequency(Hz) Total Capacity (W) Standard (Low~High) 6450(2300~7680) 8200(1750~8200) Total Capacity (Btu/h) Standard (Low~High) 22000(7800~26200) 28000(6000~28000) Power Input (W) Standard (Low~High) 1832(220~2660) 2700(260~2700) Rated Input (W) 2660 2700 Rated Current (A) 12.2 12.5 1030/800/700/600...
  • Page 12 Specifications Model of Outdoor Unit GWH24AC-D3DNA1B/O Product Code CB115W0450 Com pres sor Manufacturer/tradem ark China Resources (Shenyang) Sanyo CO.,LTD Com pres sor Model C-6RZ146H1A Com pres sor Type Twin rotary compress or L.R.A. (A) Com pres sor RLA(A) Com pres sor Power Input(W) 1640 Overload Protector 1NT11L-3979...
  • Page 13 Specifications Model GWH24AC-D3DNA2B Product Code CB11500490 COOLING HEATING Function Rated Voltage(V) 208-230 Frequency(Hz) Total Capacity (W) Standard (Low~High) 6450(2300~7680) 8200(1750~8200) Total Capacity (Btu/h) Standard (Low~High) 22000(7800~26200) 28000(6000~28000) Power Input (W) Standard (Low~High) 1832(220~2660) 2700(260~2700) Rated Input (W) 2660 2700 Rated Current (A) 12.2 12.5 1030/800/700/600...
  • Page 14 Specifications Model of Outdoor Unit GWH24AC-D3DNA1B/O Product Code CB115W0450 Com pres sor Manufacturer/tradem ark China Resources (Shenyang) Sanyo CO.,LTD Com pres sor Model C-6RZ146H1A Com pres sor Type Twin rotary compress or L.R.A. (A) Com pres sor RLA(A) Com pres sor Power Input(W) 1640 Overload Protector 1NT11L-3979...

  • Page 15: Operation Characteristic Curve

    Specifications 2.2 Operation Characteristic Curve Models:GWC18AC-D3DNA1B,GWH18AC-D3DNA1B,GWH18AC-D3DNA2B Cooling Heating 220V 220V • Conditions Indoor : DB26.7˚C/WB19.4˚C Outdoor : DB35˚C/WB23.9˚C Indoor air flow : Turbo Pipe length : 7.6m 230V 230V 240V • Conditions 240V Indoor : DB21.1˚C/WB15.6˚C Outdoor : DB8.33˚C/WB6.11˚C Indoor air flow : Turbo Pipe length : 7.6m...

  • Page 16: Capacity Variation Ratio According To Temperature

    Specifications 2.3 Capacity Variation Ratio According to Temperature Cool i n i n g Conditions Conditions Indoor:DB26.7 /WB19.4 Indoor:DB21.1 /WB15.6 Indoor air flow:Turbo Indoor air flow:Turbo Pipe length:7.6m Pipe length:7.6m –1 5 –1 0 – 5 Outdoor tem p . (˚C) Outdoor tem p .

  • Page 17: Noise Criteria Curve Tables For Both Models

    Specifications 2.5 Noise criteria curve tables for both models Indoor side noise when blowing Outdoor side noise High Super High Middle Compressor frequency/Hz Indoor fan motor rotating speed...

  • Page 18: Part 3 Construction Views

    Constrction views 3. Construction Views 3.1 Indoor Unit Left Right 15cm 15cm Uint:mm 1090 MODEL W( ) H( ) D( ) 1090...

  • Page 19: Outdoor Unit

    Constrction views 3.2 Outdoor Unit Unit:mm 1000...

  • Page 20: Part 4 Refrigerant System Diagram

    (2)Cooling & Heating Models Heat exchanger 3-Way ( INDOOR ) valve Muffler 2-Way valve 4-Way valve Strainer Expansion valve Heat exchanger Strainer ( OUTDOOR ) Strainer Cooling Heating Models: Models: GWC18AC-D3DNA1B GWC24AC-D3DNA1B GWH18AC-D3DNA1B GWH24AC-D3DNA1B GWH18AC-D3DNA2B GWH24AC-D3DNA2B Liquid:1/4”(6mm) Liquid:1/4”(6mm) Gas:1/2”(12mm) Gas:5/8”(16mm)

  • Page 21: Part 5 Schematic Diagram

    Refrigerant System Diagram 5. Schematic Diagram 5.1 Meaning of marks Indoor Unit Symbol Color symbol Symbol Color symbol WHITE BROWN YELLOW BLUE BLACK YELLOW GREEN PROTECTIVE EARTH YEGN Outdoor Unit Symbol Parts name Symbol Color symbol L1 L2 REACROR WHITE Four-way-Valve YELLOW Electronic expansion valve...
  • Page 22 Schematic Diagram Models GWC18AC-D3DNA1B/O,GWC24AC-D3DNA1B/O WARNING Please don't touch any terminal when the voltage of terminal P(DC+) and N(DC-) at 6YEGN COMP AP1 is higher than 30V to prevent the risk OUTROOM OUTTUBE EXHAUST C(T) of electrical shock! TEM.SENSOR TEM.SENSOR TEM.SENSOR...

  • Page 23: Printed Circuit Board

    Schematic Diagram 5.3 Printed Circuit Board TOP VIEW Connect to up &down Live wire Live wire of health function swing motor Jumper cap Feedback wire of PG motor Protective tube Power cord of PG motor Null wire of health function Null wire Display port Communication port...
  • Page 24 Schematic Diagram TOP VIEW Temp sensor HALL port of fan 4-way valve Electronic Compressor port Overload protector of compressor Outdoor fan expansion valve Communication port with indoor unit Live wire Ground wire Null wire Port 2 of reactor Port of capacitor PFC Port1 of reactor BOTTOM VIEW...

  • Page 25: Part 6 Function And Control

    Function and Control 6. Function and Control 6.1 Remote Control Operations ON/OFF Press it to start or stop operation.setting. : Press it to decrease temperature : Press it to increase temperature setting. Press it to set fan speed. MODE Press it to select operation mode(AUTO/COOL/DRY/FAN/HEAT/I FEEL). I FEEL Press it to select HEALTH function ON/OFF.
  • Page 26 Function and Control MODE : Each time you press this button,a mode is selected in a sequence that goes from AUTO, COOL,DRY, FAN,and HEAT as the following: COOL HEAT AUTO *Note:Only for models with heating function. After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not be displayed on the LCD, and the unit will automatically select the suitable operation mode in accordance with the room temp erature to make indoor room comfortable.

  • Page 27: Changing Batteries And Notices

    Function and Control high fan speed. (This function is not applicable for some models) SLEEP: Press this button to go into the SLEEP operation mode. Press it again to cancel. This function is available in COOL , HEAT (Only for models with heating function) or DRY mode to maintain the most comfortable temperature for you.

  • Page 28: Description Of Each Control Operation

    Function and Control 6.3 Description of each control operation 1.Basic function of system (1)Cooling mode 1.Under this mode, fan motor, swing will work under setting status, the temp. range is 16-30 (61-86 Fahrenheit scale) 2.Outdoor unit malfunction or unit stop running, indoor unit will keep origina l running status, malfunction displayed. 3.When 0 (Tset-Tamb.), if indoor fan motor is high speed, that the fan motorist running in middle speed, the middle speed or low speed will be maintained;(this condition should be executed when compressor start up);the super high speed will not rotate;...
  • Page 29 Function and Control 2. Display state of indoor indicators (1) State of indoor display board 1. When the unit is powered on, all patterns will be displayed and then only power indicator is on. When the unit is turned on with a remote controller, the operating indicator is on and operation mode which is set currently is displayed.
  • Page 30 Function and Control (4) Sleep function This mode is effective only in cooling and heating modes. Proper sleep curves shall be selected for operation according to preset temperature. In cooling mode: (1) When initial temperature is set at 16-23 , an increase of 1 will be gained every hour after the sleep function is activated. After 3 is raised, the temperature will be maintained.
  • Page 31 Function and Control (9) Locked Protection of PG Motor When starting up the fans, if the motor has run at a lower speed continuously for a period, for preventing automatic protection of the motor, stop running, and display the locked operation; if the machine is running at present, the code of the locked fault---H6 of double-eight digital tubes will be displayed;...

  • Page 32: Functions Of Outdoor Unit

    Function and Control 6.4 Functions of Outdoor Unit 1. Input Parameter Compensation (1) Input parameter compensation function As the structure feature of split unit, concerning the comfort, in heating mode, when compressor stops, the indoor ambient temperature is higher than preset temperature for 3 2.

  • Page 33: Outdoor Fan Control

    Function and Control 8.5 In all modes: once the compressor stops, it can’t restart within 3-minute (Note: The indoor units with memory function can be restarted after remote shutdown and powering on again without delay). 9. Outdoor Fan Control 9.1 When the unit is off by remote control in safety stops or stops after reaching the setting temperature, 1min later,the outdoor fan will stop;...
  • Page 34 Function and Control 16. Communication malfunction If the unit does not receive correct signal from indoor unit for 3min continuously, the unit will stop as communication malfunction protection; if communication malfunction has removed and compressor has stopped for 3min, the unit will resume running. 17.

  • Page 35: Part 7 Installation Manual

    Installation Manual 7. Installation Manual 7.1 Important Notices 1.The unit installation work must be done by qualified personnel according to the local rules and this manual. 2.Before installating, please contact with local authorized maintenance center, if unit is not installed by the authorized maintenance center, the malfunction may not solved,due to discommodious contacts.
  • Page 36 Installation Manual Safety Requirements For Electric Appliances 1. The power supply should be used the rated voltage and AC exc lusive circuit,the power cable diameter should be satisfied. 2.Don't drag the power cable emphatically. 3.It should be reliably earthed,the installation work should be operatedbythe professional. The air switch must have the functions of magnetic tripping and heat tripping, in order to protect the short circuit and overloading.

  • Page 37: Install Indoor Unit

    Installation Manual 7.2 Install indoor unit Install the rear panel 1.Always mount the rear panel horizontally. Due to the water tray of indoor unit has been adopted the both-way drainage design, the outlet of water tray should be adjusted slightly down when installing, that is taking the outlet of the water tray as the center of a circle, the included angle between the evaporator and level should be 0 or more, that is good for condensing water drainage.

  • Page 38: Install The Indoor Unit

    Installation Manual NOTE: When connecting the electric wire if the wire length is not enough, please contact with the authorized service shop to buy a exclusive electric wire that is long enough and the joint on the wire are not allowed. The electric wiring must be correctly connected, wrong connection may cause spare parts malfunction.

  • Page 39: Install Outdoor Unit

    Installation Manual 7.3 Install of Outdoor Unit El ectric wiring 1. Disassemble the handle on the outdoor unit right side plate. 2 .Take off wire clamp. Connect and fix power connect cord to terminal of line bank. Wiring should fit that of indoor unit. 3.
  • Page 40 Installation Manual Air purging and leakage test 1. Connect charging hose of manifold valve to charge end of low pressure Manifold Valve valve (both high/low pressure valves must be tightly shut). Multimeter Manometer 2. Connect joint of charging hose to vacuum pump. -76cmHg 3.

  • Page 41: Part 8 Exploded Views And Parts List

    Exploded Views and Parts list 8. Exploded Views and Parts List 8.1 Indoor Unit Models GWC18AC-D3DNA1B/I GWH18AC-D3DNA1B/I FA N MODE I FEEL TIMER CLOC K X-FA N TEMP TIMER TURBO SLEEP LIGH T...
  • Page 42 Exploded Views and Parts list Part Code Description GWC18AC-D3DNA1B/I GWH18AC-D3DNA1B/I Product Code CB115N0420 CB115N0430 Display Cover 20122042 20122042 Front Panel Assy 2001201213 2001201213 Filter Sub-Assy 11124096 11124096 Screw Cover 24252017 24252017 Front Case Assy 20012011 20012011 Evaporator Support 24212109 24212109...
  • Page 43 Exploded Views and Parts list Models GWC24AC-D3DNA1B/I GWH24AC-D3DNA1B/I 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 4 2 5 FA N MODE I FEEL CLOC K TIMER X-FA N TEMP TIMER TURBO SLEEP LIGH T...
  • Page 44 Exploded Views and Parts list Part Code Des cription GWC24AC-D3DNA1B/I GWH24AC-D3DNA1B/I Product Code CB115N0440 CB115N0450 2001207105 Front Panel As s y 2001207105 24252017 Screw Cover 24252017 11124097 Filter Sub-As s y 11124097 2001207001 Front Cas e As s y 2001207001 24214082 Evaporator Support 24214081...
  • Page 45 Exploded Views and Parts list Model GWH18AC-D3DNA2B/I FA N I F EEL MODE TIMER C LOC K X- FA N T EMP TIMER T URBO LIGH T SLEEP...
  • Page 46 Exploded Views and Parts list Part Code Description GWH18AC-D3DNA2B/I Product Code CB115N0470 Front Panel Assy 2001209804 Filter Sub-Assy 11124096 Screw Cover 24252017 Front Case Assy 20012011 Evaporator Support 24212109 Evaporator Assy 0100258401 Guide Louver 1051409605P Axile Bush 10542008 Rear Grill '01472019 Louver Clamp 26112127...
  • Page 47 Exploded Views and Parts list Model GWH24AC-D3DNA2B/I FA N MODE I FEEL CLOC K TIMER TIMER X-FA N TEMP TURBO SLEEP LIGH T...
  • Page 48 Exploded Views and Parts list Part Code Description GWH24AC-D3DNA2B/I Product Code CB115N0490 Front Panel Assy 2001214801 Screw Cover 24252017 Filter Sub-Assy 11124097 Front Case Assy 2001207001 Evaporator Support sub-assy 24214082 Evaporator Assy 01002567 Axile Bush 10542704 Guide Louver 1051215304P Axile Bush 10542008 Rear Grill 01472021...

  • Page 49: Outdoor Unit

    Exploded Views and Parts list 8.2 Outdoor Unit Model GWC18AC-D3DNA1B/O 1 1 1 2 1 4 1 5 1 6...
  • Page 50 Exploded Views and Parts list Part Code Des cription GWC18AC-D3DNA1B/O Product Code CB115W0420 Rear Grill 01473043 Fan Motor 15015064 Electric box (fireproofing) 01413148 Term inal Board 42010255 Electric Box 20113008 Radiator 49013024 Main Board 30138166 Electric Box Cover Sub-As s y...
  • Page 51 Exploded Views and Parts list Model GWH18AC-D3DNA1B/O 1 3 1 4 1 5 1 6...
  • Page 52 Exploded Views and Parts list Part Code Des cription GWH18AC-D3DNA1B/O Product Code CB115W0430 Rear Grill 01473043 Fan Motor 15015064 Electric box (fireproofing) 01413148 Term inal Board 42010255 Electric Box 20113008 Radiator 49013024 Main Board 30138167 Electric Box Cover Sub-As s y 02603217 Electric Box Ass y 0260306605...
  • Page 53 Exploded Views and Parts list Model GWC24AC-D3DNA1B/O 1 1 1 2...
  • Page 54 Exploded Views and Parts list Part Code Des cription GWC24AC-D3DNA1B/O Product Code CB115W0440 Rear Grill 01475013 Fan Motor 15014034 Electric box (fireproofing) 01413426 Electric Box 20113008 Radiator 49010252 Main Board 30138168 Electric Box Cover Sub-As s y 02603217 Electric Box Ass y 0260306610 Term inal Board Support Sub-As s y 01715016...
  • Page 55 Exploded Views and Parts list Model GWH24AC-D3DNA1B/O 1 1 1 2...
  • Page 56 Exploded Views and Parts list Part Code Des cription GWH24AC-D3DNA1B/O Product Code CB115W0450 Rear Grill 01475013 Fan Motor 15014034 Electric box (fireproofing) 01413426 Electric Box 20113008 Radiator 49013024 Main Board 30138169 Electric Box Cover Sub-As s y 02603217 Electric Box Ass y 0260306611 Term inal Board Support Sub-As sy 01715016...

  • Page 57: Part 9 Troubleshooting

    Troubleshooting 9. Troubleshooting Note: When replacing the controller, make sure insert the wire jumper into the new controller, otherwise the unit display C5 The breaker trips at once when it Measure insulation resistance to ground to see if there is any leakage. is set to "ON".
  • Page 58 Troubleshooting Improper set of temperature Adjust set temperature If cooling (heating) load is Check the forecasted load of cooling (heating) proper Check and fill the leakage, then The refrigerant has leakage or is vacuumize it and supplement the re- insufficient frigerant as required Leakage between the high pres- Replace the compressor...
  • Page 59 Troubleshooting The indoor fan motor is burned or breaks or Replace the fan motor or the defective part. has the heat protector malfunction. The built-in heat protector of the motor breaks Replace the fan motor frequently because the motor is The fan does not abnormal.
  • Page 60 Troubleshooting Controller malfunction (IC2003 Change controller broken,creepage of parallel capacitor of relay loop,relay is broken etc.) In cool, heat mode, the outdoor unit and Correctly wire according to the drawing Wire loose or wrong connection compressor will not run. Improper setting of temperature Adjust setting temp.
  • Page 61 Troubleshooting Appearance of Controller of Indoor Unit Note: When replacing the controller, make sure insert the wire jumper into the new controller, otherwise the unit display C5. The PCB above is subject to change without notice.
  • Page 62 Troubleshooting • The key testing spots(BOTTOM) Test Point Relevant Test result under normal Test Point Component conditions between two weak-current Test 1 points power between two weak-current Test 2 points power between two Test 3 N/L line 230VAC ±10% points between two Test 4 N/L line...
  • Page 63 Troubleshooting Key Test Point (Bottom) Test4 Test2 Test9 Test3 Test Test5 Test7 Test6 Tset8 Test10 Test11 Test16 Test14 Test15 Test12 Test13...
  • Page 64 Troubleshooting Test Serial Test spot Corresponding components Test value under normal circumstances Test1 Between A and C Power Supply L N 160V~265V Test2 Between B and C Power Supply L N 160V~265V Test3 Between D and E Electrolytic Capacitor for DC-Bus 180VDC~380VDC Test4 Between F and G...
  • Page 65 Troubleshooting Appearance of Controller of Outdoor Unit (Top) Appearance of Controller of Outdoor Unit (Bottom)
  • Page 66 Troubleshooting Malfunctions Normally,diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Troubleshooting procedure Confirmation Judgement by Flashing LED of Indoor/Outdoor Unit How to Check simply the main part 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...
  • Page 67 Troubleshooting 1.Confirmation 1 Confirmation of Power Supply Confirm that the power breaker operates(ON) normally; (2)Confirmation of Power Voltage Confirm that power voltage is AC 220–230–240 ±10%. If power voltage is not in this range, the unit may not operate normally. 2.Flashing LED of Indoor/Outdoor Unit and Primary Judgement Indoor unit displaying method Outdoor unit display...
  • Page 68 Troubleshooting Cooling,dehumidifying,compr 1.power supply is AC overload Off 3s blink 5 essor,outdoor fan motor will stable,fluctuation is too much protection times stop,indoor fan will 2.Power supply is too work.heating;all will stop low,overload is too much. Indoor and outdoor Cooling,compressor will Off 3s blink 6 Please refer to units communication...

  • Page 69: Troubleshooting

    Troubleshooting If higher than 265VAC, times please cut off the power supply and restart until back to normal Fan motor works. Heating: all will stop 2. If input voltage is normal, testing the voltage of electrolytic capacitor on AP1 after turn on the unit. There may be some problem and replace the AP1 if the electrolytic capacitor voltage range at 200-280V...
  • Page 70 Troubleshooting Cooling,dehumidifying Off 3s compressor will stop,indoor DC Bus voltage Power voltage is not stable □ ■ ■ ■ blink 20 fan motor works.Heating:all dips times will stop 1.Check the Input voltage if the Voltage Cooling,dehumidifying; Off 3s is lower than 150VAC,restart the compressor will stop,indoor Low DC Bus voltage □...
  • Page 71 Troubleshooting (1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel) Main Check Points: Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC. If the reactor (L) is correctly connected? If the connection is loose or fallen? If the reactor (L) is damaged? Fault diagnosis process: Turn on the unit...
  • Page 72 Troubleshooting (2) IPM Protection, Out-of-step Fault, Compressor Phase Overcurrent (AP1 below refers to the outdoor control panel) Main check points: If the connection between control panel AP1 and compressor COMP is secure? If loose? If the connec- tion is in correct order? If the voltage input of the machine is within normal range? (Use AC voltmeter to measure the voltage between terminal L and N on the wiring board XT) If the compressor coil resistance is normal? If the insulation of compressor coil against the copper tube...
  • Page 73 Troubleshooting 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 machine has run for terminal L and N restore it to board XT is within a period of time?
  • Page 74 Troubleshooting (3) High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ● Is outdoor ambient temperature in normal range? ● Are the outdoor and indoor fans operating normally? ● Is the heat dissipation environment inside and outside the unit is good? Overheat and high temperature protection Normal protection, please operate it after the...
  • Page 75 Troubleshooting (4) Start-up failure (following AP1 for outdoor unit control board) Mainly detect: Whether the compressor wiring is connected correct? Is time for compressor stopping enough? Is compressor broken? Power on the unit Is stop time of the compressor Restart it up after 3 minutes longer than 3 minutes? Does startup fail? Are the wires for the compressor connected...
  • Page 76 Troubleshooting (5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: Whether the system pressure is too high? Whether the input voltage is too low? Out of step occurs in Out of step occurs once the operation unit is powered on.
  • Page 77 Troubleshooting (6)Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board) Mainly detect: Wether the PMV is connected well or not? Is PMV damaged? Is refrigerant leaked? 20 minutes after the complete unit is powered off Is the terminal FA for the Connect the wires correctly connected correctly?
  • Page 78 Troubleshooting (7) Power factor correct or (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken The failure diagnosis process is as follows: Start Check wiring of the...
  • Page 79 Troubleshooting (8) Communication malfunction: (following AP1 for outdoor unit control board) Mainly detect: Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is there any damage? Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? The flow chart for malfunction detect: Start Did the equipment operate...
  • Page 80 Troubleshooting (9) Flow chart for outdoor communitcation circuit detecting: Start Measure voltage at the Test 10 position as shown in the diagram with a voltmeter Value jumping Measure voltage at the Test 15 position as shown in the diagram with a voltmeter Value jumping Fault with outdoor unit...
  • Page 81 Troubleshooting Appendix 1: form for indoor/outdoor unit's ambient sensor numerical value of resistance Resistance Temp. Resistance Temp. Resistance Temp. Resistance Temp.
  • Page 82 Troubleshooting Appendix 2: form for indoor/outdoor unit's tube temperature sensor numerical value of resistance Temp. Temp. Temp. Resistance Resistance Resistance Temp. Resistance...
  • Page 83 Troubleshooting Appendix 3: form for indoor/outdoor unit's air exhaust temperature sensor numerical value of resistance Temp. Temp. Resistance Resistance Temp. Resistance Temp. Resistance Notice: The above information is only for reference.

  • Page 84: Removal Procedure Of Indoor Unit

    Removal Procedure 10. Removal Procedure 10.1 Removal Procedure of Indoor Unit 1. Disassembly of front panel and filter Open the front panel and draw it outward along the groove which fixes the panel to remove it. Push the filter upward to release it from the bottom groove to remove the filter.

  • Page 85: Part10 Removal Procedure

    Removal Procedure Screw 4. Disassembly of electric box Remove earth wire of evaporator and then remove the temp sensor. Earth line Remove screws on both sides of electric box to remove the electric box. Temp sensor Screw 5. Disassembly of evaporator Remove screws on both sides of evaporator and take out the evaporator with caution.
  • Page 86 Removal Procedure 6. Disassembly of motor Remove screws on press board of motor to remove the press board.Then Unscrew retaining screws on right sleeve of cross flow fan and then remove the motor and the fan blade. Screw...

  • Page 87: Removal Procedure Of Outdoor Unit

    Removal Procedure 10.2 Removal Procedure of Outdoor Unit(1) Note: 18K, take heat pump unit for example 1. Disassembly of top cover Unscrew retaining screw of the handle and then push it downward to remove the handle. Top cover Remove screws on top cover and then remove the cover. Handle Screw 2.
  • Page 88 Removal Procedure 4. Disassembly of axial flow fan Remove retaining nut, spring washer, plain washer And then remove the axial flow fan. Retaining nut Axial flow fan Motor support 5. Disassembly of motor and motor support Remove retaining screws and then the motor Remove the screws on motor support and then lift the motor support to remove it.
  • Page 89 Removal Procedure Liquid valve 7. Disassembly of gas valve and liquid valve Remove screws on gas valve and liquid valve Unsolder weld points connecting gas valve and Return-air pipe, Then remove gas valve and liquid valve. Screw Gas valve 8. Disassembly of compressor Loose the nut with washer of the compressor.
  • Page 90 Removal Procedure 10.2 Removal Procedure of Outdoor Unit(2) Note: 24K, take heat pump unit for example 1. Disassembly of top cover and front side plate Unscrew retaining screws of the handle and push it downward to remove the handle. Remove screws of the top cover and then Top cover remove the cover.
  • Page 91 Removal Procedure 4. Disassembly of axial flow fan Remove nut, spring washer and plain washer. Then remove axial flow fan. Retaining nut Axial flow fan 5. Disassembly of motor and motor support Motor support Remove retaining screws and then the motor. Remove screws on motor support and then lift the motor to remove it.
  • Page 92 Removal Procedure 7. Disassembly of gas valve and liquid valve Remove screws on gas valve and liquid valve Gas valve Unsolder weld points connecting gas valve and Screw Return-air pipe, Then remove gas valve and liquid valve. Liquid valve 8. Disassembly of compressor Loose the nut with washer of the compressor.
  • Page 93 GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI Add:Jinji west Rd.Qianshan Zhuhai Guangdong China Tel:86-756-8522219 (After sale Service Dept) Post code: 51907 0...

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