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Part 6: Common Failures and Solutions
Failure
Failure Name
Code
High pressure switch
P1
failure
Protection for high
P2
discharge
temperature
P3
E-Anode failure
Communication data
E0
transmission
failure
Ambient
E2
Temperature
sensor failure
Evaporator coil
E3
Temperature sensor
failure
Water tank
E5
Temperature sensor
failure
Discharge
E6
Temperature sensor
failure
Suction temperature
E7
sensor failure
Solar collector
E8
temperature sensor
failure
EEPROM
EE
Parameter error
Table 1 Failure Code Table
Reason
1. High pressure switch is
broken.
2. Refrigerant is too much.
3. There is non-condensable gas
in the refrigerant system.
1. Refrigerant is not enough.
2. There is non-condensable gas
in the refrigerant system.
1.Wire lose；
An open or short circuit
between circuit board and
display.
1. The connecting wire of sensor
is open circuit or short circuit；
2.The senor is broken；
1. The connecting wire of sensor
is open circuit or short circuit；
2.The senor is broken；
1. The connecting wire of sensor
is open circuit or short circuit；
2.The senor is broken；
1. The connecting wire of sensor
is open circuit or short circuit；
2.The senor is broken；
1. The connecting wire of sensor
is open circuit or short circuit；
2.The senor is broken；
1. The connecting wire of sensor
is open circuit or short circuit；
2.The senor is broken；
PCB initialized faulty.
29
Solution
1. Replace the high pressure
switch.
2. Eliminate excess refrigerant.
3. Eliminate non-condensable
gas.
1. Increase the amount of
refrigerant.
2. Eliminate non-condensable
gas.
1.Connet the wire again；
1. Fix the connection line.
2. Replace the connection line
or display.
1. Repair the wire.
2. Replace the sensor.
1. Repair the wire.
2. Replace the sensor.
1. Repair the wire.
2. Replace the sensor.
1. Repair the wire.
2. Replace the sensor.
1. Repair the wire.
2. Replace the sensor.
1. Repair the wire.
2. Replace the sensor.
Replace PCB and display.
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