74
Multi-functional DC inverter air/water heat pump
GB
Retrieving error memory
4.10
Code
Error
Cause
E25
Reserved
E26
Failure T6 temperature sensor
T6 temperature sensor, open circuit or short circuit
E27
Ambient temperature exceeds limit
Ambient temperature > 46 °C
E28
Return temperature too high (Cooling)
Cooling: return temperature > 40 °C.
E29
Sensor error room temperature
Temperature sensor, open circuit or short circuit
E30-
31
Reserved
E32
Flow temperature too high (Heating)
Flow temperature > 75 °C. Inspect circulation pump
and filter.
E33-
35
Reserved
E36
Communication error DC fan PCB
Check communication cable
E37-
39
Reserved
E40
Flow temperature too low (Cooling)
E41-
43
Reserved
E44
1# DC motor fault
Check motor cable or motor fault
E45
2# DC motor fault
Check motor cable or motor fault
E46-
49
Reserved
E50
Coil temperature protection
• Excessive refrigerant
• Error throttling part
• Fault coil temperature sensor
E51-
57
E58
Ambient temperature falls below lower
limit
Ambient temperature < [P82]
E59-
98
Reserved
E99
Communication failure inverter model
Communication failure main PCB and inverter PCB
See last page for list of abbreviations