Gree GVH48AH-M3DNA5A Service Manual
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Gree GVH48AH-M3DNA5A Service Manual

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Summary of Contents for Gree GVH48AH-M3DNA5A

  • Page 1: Service Manual

    Change for Life Service Manual GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI...
  • Page 4 AUTO HEALTH X-FAN HUMIDITY FILTER TURBO HOUR ON/OFF ON/OFF MODE X-FAN TEMP TIMER TURBO SLEEP LIGHT...
  • Page 7 Condition Indoor: DB20 ,WB15 ; Indoor air flow: Super High; Condition Indoor: DB27 ,WB19 ; Pipe length: 5m. Indoor air flow: Super High; Pipe length: 5m. 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Outdoor temp.( ) Outdoor Temp.(...
  • Page 9 1107 1018...

  • Page 10: Indoor Unit

    Indoor unit Outdoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction Accumlator exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Electronic Strainer expansion COOLING HEATING...
  • Page 11 AP2: CN411 ROOM TEMP. MAIN BOARD SENSOR TR-OUT1 TR-OUT2 (CN390) (CN391) AP1:MAIN BOARD TUBE TEMP. SENSOR TR-IN (CN630) RECEIVER TRANSFORMER DISPLAY AP4 BOARD TERMINAL BOARD N1(X632) N(1) FAN(X1) N1(X632) COM(X101) AC-L(X631) YEGN FILTER BOARD AP3: CN16 NOUTLOUT INDOOR UNIT YEGN YEGN DC FAN MOTOR LEFT-RIGHT...
  • Page 12 EXHAUST TERMINAL BLOCK TEMP.SENSOR OUTROOM AC-L1(X1) L1-OUT(X5) T-SENSOR2 TEMP.SENSOR AC-L2(X2) L2-OUT(X6) OUTTUBE AC-L3(X3) L3-OUT(X7) TEMP.SENSOR N(X4) N(X1) N-OUT(X8) YEGN POWER REACTOR FILTER BOARD E(X9) YEGN OVERLOAD PROTECTOR N(1) OVC-COMP COMP. U(COMP-U) YEGN COMP YEGN V(COMP-V) MAIN BOARD TERMINAL BLOCK W(COMP-W) DC-MOTOR2 HEAT YEGN...
  • Page 15 E-HEATER Speed ON/OFF Function AMB. Mode ON/OFF Button ON/OFF Button Under the situation without setting ● Press this button, to turn on the unit. ● buttons, the function, press When unit is turned on, the original setting like Timer, Sleep function will the setting temperature goes up be canceled.Note: When the unit is and down 1...
  • Page 16 E-HEATER Function AMB. Speed Mode ON/OFF Speed Buttons (Continued) Speed Button After switch-on at first time, if without ● Press this button, the speed can ● any button input:1. consecutively press shift in the circulation among of twice of buttons in 20 seconds and →...
  • Page 17 E-HEATER ON/OFF AMB. Speed Mode Function AMB. AMB. AMB.Buttons (Continued) AMB. Buttons (Continued) The modes of living room, restaurant, ● Under the modes of living room, ● conference/office can only be called restaurant, conference/office,The out by pressing buttons of air con- setting temperature, speed, blowing ditioner panel.
  • Page 18 E-HEATER Speed AMB. Mode Function ON/OFF Swing Status of swing Display status of swing. ● Setting Swing Display setting temperature. Status of swing ● Display status of swing. Room temperature ● Indicate temperature of indoor ● BLOW circumstances. BLOW Function Supper strong When the typeface light is on, it ●...
  • Page 19 1.Basic Functions 1.1 Cooling Mode When Tamb.≥Tpreset+1 , the unit will run in cooling mode. Meanwhile, compressor and outdoor fan will run. Indoor fan will run at setting fan speed; When Tamb.≤Tpreset-1 , the unit will stop running in cooling mode. Compressor and outdoor fan will stop running, while indoor fan is still running at setting fan speed;...
  • Page 20 3.3 Sleep If the controller is in cooling or dry mode, after the sleep function is started, Tpreset will be increased but it won’t increase over 3 . Then the unit will run at the increased temperature. If the controller is in heating mode, after the sleep function is started, Tpreset will be decreased and it won’t decrease over 3 .
  • Page 21 ON/OFF Button AUTO HEALTH X-FAN MODE Button HUMIDITY FILTER +/- Button TURBO HOUR FAN Button ON/OFF Button Button ON/OFF MODE HEALTH SAVE Button X-FAN Button (Note: X-FAN is the same with BLOW.) TEMP Button TIMER Button X-FAN TEMP TIMER TURBO Button LIGHT TURBO SLEEP...
  • Page 22 AUTO COOL DRY HEAT Auto no display (horizontal louvers stops at current position)
  • Page 23 no display (horizontal louvers (swing angle is stops at current position) displayed dynamically) (swing angle is displayed dynamically) no display...
  • Page 24 Signal sender Battery Reinstall Cover of Remove battery box...
  • Page 28 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 Drill wall holes (select it according to the actual situation) Connect pipes of indoor Fix outdoor unit unit and drainage pipe...
  • Page 29 Indoor Outdoor Φ70mm ° 5-10...
  • Page 30 Drain hose Outlet pipe right left back Drain hose right left back Tape Outlet pipe Drain hose upper and lower adjusting baffle Insulating pipe power cable-cross connection hole wire screw pipe pipe joint union nut air-inlet panel N(1) yellow- blue black brown green open-end wrench...
  • Page 31 earthing wire wiring board drain hose connection pipe band indoor power cord wire clip indoor outdoor wall pipe sealing gum indoor and outdoor power cord indoor unit gas pipe liquid pipe band drain hose...
  • Page 32 N(1) yellow- yellow- blue black violet blue blue black brown green green POWER Indoor unit connection Note: the wiring connection is for reference only, please refer to the actual one. drain vent chassis outdoor drain joint drain hose foot holes handle foot holes front side plate...
  • Page 33 The drain hose can't be fluctuant The water outlet can't be placed The drain in water hose can't be fluctuant The water outlet can't be fluctuant piezometer liquid valve gas valve valve cap vacuum pump refrigerant charging vent valve cap nut of refrigerant inner charging vent...
  • Page 35 Start Are the display panel and main board Connect the display panel with the main board well Malfunction is eliminated. connected tightly? Are the OVC terminal Connect the OVC terminal on the main board with on the main board connected Malfunction is eliminated.
  • Page 36 Start Clean the filter, check Is the problem Poor air return in indoor unit space at the top of solved? indoor unit Check whether jumper Is the problem The fan speed is abnormal cap and motor is solved? normal Is the problem Evaporator is dirty Clean the evaporator solved?
  • Page 37 “E3" is displayed on the unit. Is the terminal Re-insert it tightly of low pressure switch to ensure reliable inserted well? contact. Is the malfunction eliminated? Is the system pressure higher than the acting Add refrigerant. value of the low pressure switch? Is the malfunction...
  • Page 38 Start Check the system; Problem is Abnormal system (blockage) eliminate the solved blockage Motor speed of Check wiring and Problem is outdoor unit is abnoral fan capacitor, solved (under cooling mode) replace motor Check the unit to Abnormal air in for Problem is let the air come in outdoor unit (under cooling...
  • Page 39 Start Normal fluctuation is within 10% of the rated voltage on the Is the supply voltage unstable with big fluctuation? Malfunction is eliminated. nameplate Is the supply voltage too low with overload? Adjust the supply voltage to maintain it within normal range Malfunction is eliminated.
  • Page 40 1. E1: High pressure protection Malfunction description: The pressure of ODU high pressure side is too high. Main check points: a. Is the system pressure is normal; b. Is the pressure switch is normal; c. If above two issues are normal, the mainboard circuit is with malfunction, please replace mainboard. Pressure switch terminal of high Pressure 2.
  • Page 41 Pressure switch terminal of low Pressure Communication power supply positive pole test point Communication power supply negative pole test point Test point U4 Test point U1 Test point D9 Test point C15 reference test point...
  • Page 42 Air discharging temp.sensor--ambient temp.sensor--tube temp.sensor DC fan terminal...
  • Page 43 Compressor overload detection terminal 15V positive pole test point--5V negative pole test point Phase U---phase V--phase W...
  • Page 44 PFC inductance connection terminal...
  • Page 48 12 13 9 10 11 14 15 19 20 21...
  • Page 52 Steps Procedure 1. Remove air-inlet panel Remove the screw stopper; remove the screws fixing air-inlet panel and pull the upper part of air-inlet panel outwards. screw air-inlet panel 2. Remove air-outlet panel Remove the screws fixing the top and air-outlet panel lower part of air-outlet panel;...
  • Page 53 Steps Procedure 3. Remove display board, horizontal swing motor and vertical swing motor Remove the screws fixing controller box; display board remove the controller box cover to remove the display board; remove the screw fixing motor in the air-outlet panel sub-assy;...
  • Page 54 Steps Procedure air guard 5. Remove electric box assy Remove the screw fixing electric box cover to remove the electric box cover; disconnect each wiring terminal; remove the relevant electrical elements according to the requirement; remove the screw fixing electric box to remove the electric box assy.
  • Page 55 Steps Procedure 6. Remove top cover top cover Remove the screw fixing top cover to remove the top cover. 7. Remove evaporator assy Remove the screws fixing the top connection plate and lower connection plate of evaporator; pull the left side plate and right side plate outwards slightly to remove the evaporator evaporator, water guard and water tray;...
  • Page 56 Steps Procedure 8. Remove propeller housing clamp Remove the screws fixing propeller housing clamp and then pull the propeller housing clamp outwards to remove the propeller housing clamp. propeller housing clamp 9. Remove propeller housing sub-assy Remove the screws fixing propeller housing to remove the propeller housing sub-assy.
  • Page 57 Steps Procedure 10. Remove centrifugal blade Remove the nut fixing centrifugal blade to remove the centrifugal blade. centrifugal blade 11. Remove motor Remove the remove the wire clamp on the rear plate; disconnect the motor wire and remove the screws fixing motor to remove the motor.
  • Page 58 Steps Procedure 12. Remove chassis Remove the screws fixing chassis to remove the chassis. chassis 13. Remove left side plate and right side plate left side plate right side plate Remove the screws fixing left side plate and right side plate to remove the left side plate and right side plate sub-assy.
  • Page 59 Steps Procedure 1.Remove top panel top panel Twist off the screws used for fixing the top cover with screwdriver, lift up the top cover and then remove the top cover 2.Remove front side plate Twist off the screws used for fixing the front side plate, pull the front side plate forward and outward and then remove the front side plate front side plate...
  • Page 60 3.Remove right side plate Twist off the screw used for fixing the right side plate and then pull the right side plate outward. right side plat...
  • Page 61 Steps Procedure 5.Remove grille Twist off the screw used for fixing the grille, loosen the clasp, pull out the grille outward and grille then remove the grille 6.Remove cabinet Twist off the screw used for fixing the outer case, cabinet pull the cabinet outwardand then remove the cabinet.
  • Page 62 8.Remove electric box electric box Cut off the tieline, pull out the wiring terminal, remove all the connecting wires, twist off the screws used for fixing the electric box, pull it upward and then remove the electric box. 9.Remove axial flow blade Twist off the nuts used for fixing the axial flow blade, pull the axial flowblade outwardand then remove the blade.
  • Page 63 10.Remove motor Twist off the screws used for fixing the motor, pull out the motor wire and pull it outward,then remove the motor. motor 11.Remove four-way valve and air intake pipe four-way valve Release the refrigerant completely, unsolder the air intake pipe of compressor, outlet pipe of condenser, connecting pipe of gas valve and gas and liquid separator, then pull the four-way valve and air intake pipe.
  • Page 64 Steps Procedure 13.Remove gas and liquid separator gas and liquid seperator Loosen the two screws used for fixing the gas and liquid separator, pull it upward and then remove the gas and liquid separator. 14.Remove compressor Twist off the nuts used for fixing the compressor compressor withwrench, pull the compressor upward to remove it.
  • Page 65 16.Remove clapboard Remove 5 screws connecting clapboard,end plate of condenser and chassis,and then remove clapboard. clapboard 17.Remove left side plate Twist off the screws connecting the left side plate and chassis withscrewdriver, and then remove the left side plate. left side plate 18.Remove condenser...
  • Page 67 Pipe Pipe cutter Leaning Uneven Burr Pipe Shaper Downwards Union pipe Pipe Hard mold Expander Pipe Smooth surface Improper expanding leaning damaged crack uneven surface thickness The length is equal...
  • Page 71 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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