Gree GWH18RC-K3DNA5G Service Manual Download Page 52

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Installation and Maintenance

Service Manual

(7) Malfunction of PFC Protection (HC)

Main check point:

Whether power supply is normal?

Check flow chart:

Start

Check whether power supply is

normal

Is power abnormal?

Replace main board of

outdoor unit

End

Turn on the unit again

after the power is

resumed

Yes

Summary of Contents for GWH18RC-K3DNA5G

Page 1: ...GREE ELECTRIC APPLIANCES INC OF ZHUHAI Change for Life Service Manual GWH18RC K3DNA5G GWH24RD K3DNA5G Refrigerant R410A Models...

Page 2: ...m Diagram 8 5 Electrical Part 9 5 1 Wiring Diagram 9 5 2 PCB Printed Diagram 11 6 Function and Control 13 6 1 Remote Controller Introduction 13 6 2 Brief Description of Modes and Functions 17 Part Ins...

Page 3: ...ded View and Parts List 56 10 1 Indoor Unit 56 10 2 Outdoor Unit 60 11 Removal Procedure 64 11 1 Removal Procedure of Indoor Unit 64 11 2 Removal Procedure of Outdoor Unit 69 Appendix 80 Appendix 1 Re...

Page 4: ...al 1 Summary Part Technical Information Indoor Unit GWH18RC K3DNA5G I GWH24RD K3DNA5G I Outdoor Unit GWH18MC K3DNE3G O GWH24MD K3DNE3G O Remote Controller YT1F MOTO FAN MODE I F EEL CLOCK TIMER ON X F...

Page 5: ...RC K3DNA5G I GWH24RD K3DNA5G I Product Code of Indoor Unit CB304N02500 CB304N02800 Fan Type Cross flow Cross flow Diameter Length DXL mm 98X710 100X765 Fan Motor Cooling Speed SH H M L SL r min 1350 1...

Page 6: ...4 Coil Length LXDXW mm 851X38 1X660 984X38 1X748 Fan Motor Speed rpm 750 800 Output of Fan Motor W 60 90 Fan Motor RLA A Fan Motor Capacitor F Air Flow Volume of Outdoor Unit m3 h 3200 4000 Fan Type A...

Page 7: ...e length 5m Conditions Indoor DB20 C WB15 C Outdoor DB7 C WB6 C Indoor air flow High Pipe length 5m Cooling Heating Cooling Heating 32 33 34 35 36 37 38 39 43 15 10 5 40 41 42 100 105 95 90 85 80 75 7...

Page 8: ...onnecting indoor and outdoor unit Inlet and outlet pipe temperature of heat exchanger Fan speed of indoor unit Fan speed of outdoor unit Compressor frequency Hz Indoor Outdoor P MPa T1 o C T2 o C 20 1...

Page 9: ...6 Technical Information Service Manual 3 Outline Dimension Diagram 3 1 Indoor Unit Unit mm Models W H D 18K 945 298 211 24K 1018 315 230 W 694 685 189 144 57 38 116 45 45 60 95 55 55 70 70 194 D H...

Page 10: ...7 Technical Information Service Manual 3 2 Outdoor Unit Unit mm 24K 18K 963 892 700 396 341 368 560 427 1000 920 610 370 790 395...

Page 11: ...lve Discharge Suction Heat exchanger evaporator Heat exchanger condenser Valve Valve Liquid pipe side Gas pipe side Strainer Capillary Strainer Accumlator Compressor 4 Refrigerant System Diagram Conne...

Page 12: ...k VT Violet OG Orange Note Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model Model GWH18RC K3DNA5G I SENSOR SENSOR L AC L BK PE ROOM TUBE M2 SWING UD ROO...

Page 13: ...ING Please don t touch any terminal when the voltage of terminal P DC and N DC at AP1 is higher than 30V to prevent the risk of electric shock POWER COMP L1 W V U PRINTED CIRCUIT BOARD L1 PE YEGN FAN...

Page 14: ...ire 5 Interface of neutral wire for health function 6 Control interface of PG motor 7 Interface of live wire for health function 8 Interface of indoor unit and outdoor unit communication 9 Auto button...

Page 15: ...emperature sensor 3 Terminal of electronic expansion valve 4 Terminal of outdoor fan 5 Terminal of 4 way valve 6 Terminal of compressorelectric heating 7 Terminal of chassis electric heating 8 Termina...

Page 16: ...ndoor ambient temp 2 3 6 8 11 13 14 1 7 4 5 9 10 12 15 health function I feel 1 ON OFF button 2 button 3 FAN button 4 MODE button 5 I FEEL button 8 CLOCK button 9 TIMER ON TIMER OFF button 11 X FAN bu...

Page 17: ...ndoor ambient temperature Set temperature range from remote controller 16 30 C 61 86 Fan speed auto low speed medium speed high speed 5 I FEEL button Press this button to turn on I FEEL function The u...

Page 18: ...te controller temperature indicator on indoor unit displays outdoor ambient temperature Note Outdoor temperature display is not available for some models At that time indoor unit receives signal while...

Page 19: ...e controller should be close to indoor unit during operation Replace new batteries of the same model when replacement is required When you don t use remote controller for a long time please take out t...

Page 20: ...rost ing signal from outdoorunit displayerwill Heating indicator on indoor display is off for 0 5s and then on for 10s during blinking 10slater indoor fan motor will stop to run 5 Anti coold wind func...

Page 21: ...ll be cleared Frequency limitation and reduction states shall be displayed by means of remote calling 2 Failure display control Indicator failure display shall be kept synchronous with Double 8 failur...

Page 22: ...modes 7 Control of indoor fan Indoor fan can be set at four levels super high high middle and low with a remote controller When one level is set the fan will thus operate at such level The fan can als...

Page 23: ...eration according to the actual defrosting result and the complete unit will resume normal heating operation Outdoor Units 1 Input Parameter Compensation and Calibration 1 Check the ambient temperatur...

Page 24: ...defrosting operation will start Conditions of finishing defrosting The defrosting operation can exit when any of the conditions below is satisfied Toutdoor pipe temperature Toutdoor ambient temperatur...

Page 25: ...erature you should adjust the compressor frequency by reducing 8Hz 90s till the lower limit 4 Reducing frequency at high speed If Tfrozen preventing power turn off temperature T inner pipe Tfrozen pre...

Page 26: ...frequency reducing temperature at normal speed T inner pipe then overload protects machine stopping 3 Reducing frequency at high speed and power turn off If Theating overload frequency reducing temper...

Page 27: ...ing frequency 3 Power turn off If I Phase Current I Power Turn Off Phase Current the compressor phase current shall stop working for overcurrent protection if I Phase Current I Frequency Reducing Phas...

Page 28: ...ensor You should not detect the failure of outdoor tube sensor within 10 minutes heating operation compressor except the defrosting and you could detect it at other time 3 Outdoor Exhaust Sensor a The...

Page 29: ...unit adequately grounded The grounding wire can t be used for other purposes 6 Must apply protective accessories such as protective boards cable cross loop and wire clip 7 The live wire neutral wire a...

Page 30: ...ng tape 4 Electroprobe 7 Electronic leakage detector 10 Pipe pliers pipe cutter 2 Screw driver 5 Universal meter 8 Vacuum pump 11 Pipe expander pipe bender 3 Impact drill drill head electric drill 6 T...

Page 31: ...east 15cm At least 15cm At least 250cm Space to the wall S p a c e t o t h e o b s t r u c t i o n r o o l f e h t o t e c a p S Space to the obstruction Drainage pipe Space to the wall Space to the o...

Page 32: ...or unit Make the bound pipes pass through the wall hole and then connect outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installat...

Page 33: ...pecialized grounding device by a professional Please make sure it is always grounded effectively otherwise it may cause electric shock 2 The yellow green wire in air conditioner is grounding wire whic...

Page 34: ...outlet pipe The position of piping hole should be a little lower than the wall mounted frame As show in Fig 1 5 Connect the Pipe of Indoor Unit 1 Aim the pipe joint at the corresponding bellmouth As...

Page 35: ...ord for installation when binding them When binding to a certain degree separate the indoor power and then separate the drain hose As show in Fig 15 3 Bind them evenly 4 The liquid pipe and gas pipe s...

Page 36: ...t installation location according to the house structure 2 Fix the support of outdoor unit on the selected location with expansion screws 5 Connect Outdoor Electric Wire 1 Remove the wire clip connect...

Page 37: ...Remove the valve caps on the liquid valve and gas valve and the nut of refrigerant charging vent 2 Connect the charging hose of piezometer to the refrigerant charging vent of gas valve and then conne...

Page 38: ...ature sensor is open short circuited F1 Indoor evaporator temperature sensor is open short circuited F2 Module temperature sensor is open short circuited P7 Outdoor ambient temperature sensor is open...

Page 39: ...then peformedischarging NOTE A large capacity electrolytic capacitor is used in the outdoor unit controller inverter Therefore if the power supply is turned off charge charging voltage DC280V to 380V...

Page 40: ...ard broken Malfunction diagnosis process Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted Start Insert the temperature sensor tightly Yes Yes Yes Y...

Page 41: ...he connection of PG motor control terminal is firm Turn on the unit again measure whether the output voltage on control terminal for PG motor is more than 50V within 1 min after the louvers are opened...

Page 42: ...the mainboard is defined abnormal Malfunction diagnosis process Start Is there jumper cap on the mainboard Is the jumper cap inserted correctly and tightly Replace the jumper cap with the same model...

Page 43: ...harges slowly The zero cross detectioncircuit of the mainboard is defined abnormal Malfunction diagnosis process Turn power off for 1minute the turn back on The unit returns to normal Conclusion U8 is...

Page 44: ...wiring diagram Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated Is malfunction eliminated Main board matches with display board Main board of IDU matches with that of ODU...

Page 45: ...rs after de energizing and turning on the unit Whether stop time for compressor is more than 3min No No No No No No No Yes Yes Yes Yes Yes No Yes Yes Yes Yes Whether valve of outdoor unit is opened Wh...

Page 46: ...uch as clean heat exchanger improve ventilation etc Turn on the unit again after the power voltage is resumed Charge refrigerant according to service manual Whether the outdoor fan can operate normall...

Page 47: ...ed Check flow chart Start the troubleshooting for temperature sensor Check the connection between temperature sensor and wiring terminal is loose or in poor connection Check whether the temperature se...

Page 48: ...ient temperature Whether the resistance 1K Whether wire connection wire electronic expansion valve is in good condition Check the coil of electronic expansion valve If it s damaged please replace it I...

Page 49: ...min There is malfunction for the detection circuit on main board of outdoor unit Check the input power and resume the power supply normal Is malfunction eliinated Measure the voltage at both ends of...

Page 50: ...minal is connected well Whether the fan is damaged Replace fan capacitor unavailable for DC fan Replace outdoor fan Whether outdoor ambient temperature is more than 53o C Whether radiation inside or o...

Page 51: ...or wires are connected correctly Whether there re above circumstances Connect compressor wires according to correct wiring method Modify it according to Service Manual and then energize and turn on th...

Page 52: ...function of PFC Protection HC Main check point Whether power supply is normal Check flow chart Start Check whether power supply is normal Is power abnormal Replace main board of outdoor unit End Turn...

Page 53: ...n board of outdoor unit is damaged Check flow chart Communication malfunction De energize the unit and then check whether connection wires between indoor unit and outdoor unit and wiring inside the el...

Page 54: ...time for compressor is more than 3min Whether compressor wires are connected correctly The stop time for unit is not enough high pressure and low pressure of system are unbalanced please wait for 3min...

Page 55: ...the compressor Replace the mainboard with the same model End Is the supply voltage too low with overload Is the indoor outdoor heat exchanger dirty or are the air inlet and outlet blocked The fan is...

Page 56: ...tection circuit malfunctions of phase current of compressor U1 Hardware of main board is damaged Please replace main board 4 DC busbar voltage is too high PH Input voltage is too high or unstable Hard...

Page 57: ...od for details Malfunction of compressor Compressor can t operate Refer to point 5 of maintenance method for details 9 3 Troubleshooting for Normal Malfunction 1 Air Conditioner Can t be Started Up 2...

Page 58: ...re parts touching together inside the outdoor unit There s abnormal sound fro outdoor unit Remove foreign objects Adjust all parts position of outdoor unit tighten screws and stick damping plaster bet...

Page 59: ...56 Installation and Maintenance Service Manual 10 Exploded View and Parts List 10 1 Indoor Unit 18K FAN MODE I F EEL CLOCK TIMER ON X FAN TEMP TIMER OFF TURBO SLEEP LIGHT...

Page 60: ...earing 7651205102 1 15 Ring of Bearing 26152022 1 16 Evaporator Assy 01002575 1 17 Evaporator Support 24212133 1 18 Pipe Clamp 2611216402 1 19 Motor Press Plate 26112494 1 20 Fan Motor 15012146 1 21 W...

Page 61: ...on and Maintenance Service Manual 24K FAN MODE I F EEL CLOCK TIMER ON X FAN TEMP TIMER OFF TURBO SLEEP LIGHT 37 38 34 33 35 36 1 2 3 4 6 7 8 9 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 27 28 29 30...

Page 62: ...2139 1 14 Evaporator Assy 01100100032 1 15 Wall Mounting Frame 01252032 1 16 Motor Press Plate 26112330 1 17 Fan Motor 15012098 1 18 Pipe Clamp 2611218801 1 19 Drainage hose 0523001405 1 20 Step Motor...

Page 63: ...60 Installation and Maintenance Service Manual 10 2 Outdoor Unit GWH18MC K3DNE3G O 2 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 29 30 28 31 32 33 34 35...

Page 64: ...133204 1 12 Valve support assy 01715010P 1 13 Right Side Plate 0130509402P 1 14 Valve cover 22245002 1 15 Handle 26233053 1 16 Wiring Clamp 26115004 1 17 Rear Grill 01473043 1 18 Condenser Assy 011638...

Page 65: ...62 Installation and Maintenance Service Manual GWH24MD K3DNE3G O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 35 34 36 37...

Page 66: ...Sub Assy 07135072 1 14 Cut off Valve 07133157 1 15 Baffle Valve Support 01365435P 1 16 Right Side Plate 0130504401P 1 17 Valve Cover 22245003 1 18 Big Handle 26235001 1 19 Wiring Clamp 26115004 1 20 R...

Page 67: ...urning off all power supplies and discharge the refrigerant completely before removal Procedure Steps a a b panel clasp left filter and right filer 1 Remove filter Open the panel Loosen the clasp show...

Page 68: ...air outlet 2 The quantity of screws fixing the front case sub assy is different for different models screw screw caps screws front case sub assy 3 Remove horizontal louver Push out the axile bush on h...

Page 69: ...tor and wiring terminal of step motor from the mainboard Note 1 Location of tube temperature sensor and tieline on the evaporator is different for different models 2 When pulling out the wiring termin...

Page 70: ...n pipe clamp and then remove the connection pipe clamp Remove 3 screws fixing evaporator assy evaporator c Adjust the position of connection pipe on evaporator slightly and then lift the evaporator up...

Page 71: ...otor clamp and then remove the motor clamp Remove the screws at the connection place of cross flow blade and motor lift the motor and cross flow blade upwards to remove them c Remove the bearing holde...

Page 72: ...alve cover up ward to remove it b a a 1 Remove top panel Remove handle valve top panel top panel the 3 screws connecting the top panel with the front panel and the right side plate and then remove the...

Page 73: ...hassis and the motor support and then remove the panel 3 Remove left side plate and right side plate Remove the screws connecting the right side plate with the chassis the valve support and the electr...

Page 74: ...he wiring terminals and then pull the electric box upwards to remove it Remove the 4 tapping screws fixing the motor disconnect the leading wire insert of the motor and then remove the motor Remove th...

Page 75: ...proof sponge carefully soundproof sponge 7 Remove Isolation sheet Remove the 3 screws fixing the isolation sheet and then remove the Isolation sheet Isolation sheet 8 Remov e 4 way valve assy Discharg...

Page 76: ...ve the compressor Remove the screws connecting the support condenser and condenser assy and then remove the support condenser 9 Remov e compressor compressor 10 Remove condenser sub assy a support cap...

Page 77: ...ove the 3 screws connecting the top panel with the front panel and the right side plate and then remove the top panel top panel 2 Remove grille front side plate and panel Remove Remove the 1 screw con...

Page 78: ...the panel 3 Remove right side plate and left side plate Remove the screws connecting the right side plate with the chassis the valve support and the electric box and then remove the right side plate...

Page 79: ...t the wiring terminals and then pull the electric box upwards to remove it Remove the 4 tapping screws fixing the motor disconnect the leading wire insert of the motor and then remove the motor Remove...

Page 80: ...the soundproof sponge carefully 7 Remove Isolation sheet Remove the 3 screws fixing the isolation sheet and then remove the Isolation sheet Isolation sheet Discharge the refrigerant completely unsold...

Page 81: ...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 valv...

Page 82: ...79 Installation and Maintenance Service Manual 11 Remove condenser sub assy Remove the chassis sub assy and condenser sub assy chassis sub assy condenser sub assy...

Page 83: ...32 0 55 56 55 4 13 79 80 78 8 26 34 35 33 8 1 57 58 57 2 14 81 80 6 27 36 35 6 2 59 60 59 15 82 83 82 4 28 37 38 37 4 3 61 62 60 8 16 84 85 84 2 29 39 40 39 2 4 63 62 6 17 86 87 86 30 41 42 41 5 64 65...

Page 84: ...llowing steps A Cut the pip Confirm the pipe length according to the distance of indoor unit and outdoor unit Cut the required pipe with pipe cutter B Remove the burrs Remove the burrs with shaper and...

Page 85: ...88 33 10 63 72 2 439 111 0 737 5 63 46 34 10 2 73 2 358 112 0 717 4 60 23 35 9 779 74 2 28 113 0 697 3 57 18 36 9 382 75 2 206 114 0 678 2 54 31 37 9 003 76 2 133 115 0 66 1 51 59 38 8 642 77 2 064 1...

Page 86: ...983 5 84 61 34 13 59 73 3 144 112 0 956 4 80 31 35 13 04 74 3 04 113 0 93 3 76 24 36 12 51 75 2 94 114 0 904 2 72 41 37 12 76 2 844 115 0 88 1 68 79 38 11 52 77 2 752 116 0 856 0 65 37 39 11 06 78 2 6...

Page 87: ...62 11 32 101 3 22 15 362 9 24 51 41 63 10 93 102 3 13 14 342 8 25 49 19 64 10 54 103 3 04 13 323 9 26 47 08 65 10 18 104 2 96 12 306 2 27 45 07 66 9 83 105 2 87 11 289 6 28 43 16 67 9 49 106 2 79 10 2...

Page 88: ...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 Natha...

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