Gree Versati II Series, Service Manual

Page 1: ...Change for life GREE ELECTRIC APPLIANCES INC OF ZHUHAI Air to water Heat Pump Monobloc Versati Test Operation Troubleshooting Maintenance ...

Page 2: ...pressure Protection E3 4 3 3 Comp Discharge Temp Protection E4 4 3 4 Overload Protection of Compressor or Driver Error 5 3 5 DC Fan Error EF 5 3 6 Temperature Sensor Error 6 3 7 Communication Malfunction E6 6 3 8 Capacity Switch Error Code C5 7 4 Diagnosis of Driving 7 4 1 Diagnosis Flowchart of Driving of Single phase Unit and Three phase Unit 7 5 Daily Maintenance and Repair 11 5 1 Daily Mainten...

Page 3: ...ng communication between AP1 and AP2 between the wired controller and the main board When there is unusual communication this error will be displayed at the wired controller Then check out the cause according to the displayed error See the figure below for wiring of the communication system CN8 CN7 CN6 CN5 AP1 AP2 Wired controller CN5 Red Long distance Minitor PC BMS CN4 White 1 4 Trial Run Start ...

Page 4: ...nk sens 2 25 Solar kit entering water temp sensor T SL water out 26 Solar kit leaving water temp sensor T SL water in FH 27 Solar kit temp sensor T Solar pannel FF 28 Swimming pool entering water temp sensor T Swimming in 29 Swimming pool leaving water temp sensor T Swimming out 30 Swimming pool water temp sensor T Swimming 31 Remote room sensor 1 T Remote Air1 F3 32 Remote room sensor 2 T Remote ...

Page 5: ... U V Sensor con PD 61 Communication error to the outdoor unit ODU Com E6 62 Communication error to the indoor unit IDU Com E6 63 Communication error to the drive Driver Com E6 64 Solar kit superheating Solarsuperheat F6 3 Flow Chart Of Troubleshooting 3 1 Comp High pressure Protection E1 Comp High pressure protection E1 Check if the High pressure switch is broken Replace the High pressure switch C...

Page 6: ...o 3 3 Comp Discharge Temp Protection E4 Comp Discharge Temp Protection E4 Measure if the exhaust temperature of compressor reaches120 Replace the corresponding exhaust temperature sensor Check if the the electronic expansion valve is blocked Check if the system has leaked The refrigerant of the system is not enough and add refrigerant according to the required volume Repair the leakage of system p...

Page 7: ... the voltage is normal Check if the refrigerant of the system is excessive Contact the power supply company Recharge suitable amount of the refrigerant yes no no yes no yes yes 3 5 DC Fan Error EF EF is displayed on the wired controller Is the motor wire phase sequence right Adjust the motor wire Is the Fan wire terminal loose Replace the mainboard AP2 Does it work normally Work Normally yes no ye...

Page 8: ... sensor no Replace the mainboard of the AP1 or AP2 3 7 Communication Malfunction E6 Communication Malfunction E6 Check if the communication line of the unit is connected Check the orientation of plug and socket Measure if the Communication line is through yes no Replace the communication line no Check if the communication line of the unit is connected correctly yes Check the orientation of plug an...

Page 9: ...unit is connected correctly yes yes no Communication Malfunction E6 Communication Malfunction E6 Communication Malfunction E6 Communication Malfunction E6 Communication Malfunction E6 4 Diagnosis of Driving 4 1 Diagnosis Flowchart of Driving of Single phase Unit and Three phase Unit 4 1 1 Drive Module Reset Code P0 IPM or PFC Temperature Sensor Error Code P7 AC Current Protection Input Side Code P...

Page 10: ...splayed in the mainboard 88 indicating lamp Replace the driver board AP4 Work Normally 4 1 2 IPM or PFC Over temperature Protection Code P8 Is the IPM or PFC module of the driver board AP4 tightened Replace the driver board AP4 Overtemp mod is displayed on the wired controller P8 is displayed in the mainboard 88 Indicating Lamp Work Normally Tighten the IPM or PFC module ...

Page 11: ... or PL is displayed in the mainboard 88 Indicating Lamp Work Normally Please cut off the power and notify the power company Replace the mainboard Does it work normally Note three phase input voltage is in the range from 320VAC to 475VAC 4 1 4 Drive to main control Communication Error Code P6 Drive main com is Displayed on the wired controller P6 is displayed in the mainboard 88 Indicating Lamp Is ...

Page 12: ...ressor Motor Desynchronizing Code H7 IPM Protection Code H5 Phase Loss Code LD Start failure is displayed on the wired controller LC is displayed in the mainboard 88 indicating lamp Replace the mainboard Does it work Normally Replace the mainboard Does it work Normally Replace the mainboard Does it work Normally Replace the mainboard Does it work Normally LC is displayed in the mainboard 88 indica...

Page 13: ...oid protection or damage of unit caused by blockage of water system clean the filter in water system periodically and frequently check water replenishing device In order to ensure anti freezing protection never cut off the power if ambient temp is below zero in winter In order to avoid frost crack of the unit water in the unit and pipeline system not used for a long period should be drained In add...

Page 14: ...stem is blocked or there is air in it Check water pump valve and pipeline Clean water filter or evacuate Adjust the load or add accumulating devices The unit does not heat although compressor is running Leakage of refrigerant Malfunction of compressor Repair by leakage detection and add refrigerant Replace compressor Poor efficiency of hot water heating Poor heat insulation of water system Poor he...

Page 15: ...rature high pressure vapor refrigerant or evaporate the low temperature low pressure liquid refrigerant Heat of condensation is taken away by circulation water and heat for evaporation is supplied also by circulation water Water Pump It is the power equipment for water circulation Expansion Tank It is used to keep stable pressure of the water system The tank is charged with a certain volume of nit...

Page 16: ...ating performance of the system Safety Valve It is used to prevent the pressure of circulation water from increasing unusually When the pressure is larger than the set point 0 6MPa this valve will open to relieve water pressure Exhaust Valve It is used to expel air trapped inside the water system to make sure normal operation of the system It is usually installed at the highest point of the system...

Page 17: ...o vacuum the unit Pressure Meter Vacuum pump Connection Pipe Note when vacuuming is finished pressure inside the unit should be kept lower than 80Pa for at least 30 minutes to make sure there is no leak Either charging valve 1 or charging valve 2 can be used for vacuuming 3 Charging when vacuuming is finished and it is certain that there is no leak charging can be done Be sure to charge the specif...

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