GREE HEAT PUMP WATER HEATER (NORTHERN EUROPE) ERROR CODE

Code Indication = E1
Error Name = Comp High-pressure protection
Cause of Error Code = Comp High-pressure switch is broken or the wiring is loose.
The water in the tank is not enough.
The installation of tank temp sensor is not correct.
The gas valve and liquid valve are not fully open.
The thermal expansion valve can not work normally
Control Description = Press ON/OFF key to clear

Code Indication = E3
Error Name = Comp Low- pressure protection
Cause of Error Code = Comp Low-pressure switch is broken or the wiring is loose.
The system has leaked.
The fans stop running or reverse.
Control Description = Press ON/OFF key to clear

Code Indication = E4
Error Name = Comp Discharge temp protection
Cause of Error Code = The resistance of temperature sensor is not correct.
The thermal expansion valve is blocked.
The system has leaked.
Mainboard of outdoor unit is damaged
Control Description = Press ON/OFF key to clear

Code Indication = E5
Error Name = Comp overload protection
Cause of Error Code = AC contactor is damaged.
The compressor wiring is not correct.
The voltage is not normal.
Overcurrent test board is damaged.
The refrigerant of the system is excessive
Control Description = Press ON/OFF key to clear

Code Indication = E8
Error Name = Fan 1 overload protection
Cause of Error Code = Mainboard of outdoor unit is damaged.
The wire connecting the wiring terminals of the mainboard breaks.
Control Description = Press ON/OFF key to clear

Code Indication = b8
Error Name = Fan 2 overload protection
Cause of Error Code = Mainboard of outdoor unit is damaged.
The wire connecting the wiring terminals of the mainboard breaks.
Control Description = Press ON/OFF key to clear

Code Indication = F3
Error Name = Defrost temp sensor failure
Cause of Error Code = The plug on temperature sensor is not correctly connected to the socket on mainboard.
The resistance of temperature sensor is not correct.
Control Description = Auto resume

Code Indication = F5
Error Name = Discharge temp sensor error
Cause of Error Code = The plug on temperature sensor is not correctly connected to the socket on mainboard.
The resistance of temperature sensor is not correct.
Control Description = Auto resume

Code Indication = F7
Error Name = Outdoor ambient temp sensor failure
Cause of Error Code = The plug on temperature sensor is not correctly connected to the socket on mainboard.
The resistance of temperature sensor is not correct.
Control Description = Auto resume

Code Indication = EC
Error Name = Communication malfunction
Cause of Error Code = The communication line of the unit is not connected.
The communication line is not through.
The communication line of the unit is not connected correctly.
The two ends of communication line are not mounted with magnetic ring.
The outdoor unit is not electrically powered.
Control Description = Auto resume


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