SERVICE BY QUALIFIED TECHNICIANS
Error
Code
Possible Cause
Action
E54
Air ambient temp. sensor error
Cancel the logical judgment
E55
Water tank temp. sensor error
E56
Pipe backwater sensor error (hot water type)
E57
Water outlet sensor error
Cancel the logical judgment
E58
Coil temp. sensor error for heating(sys2)
Cancel the logical judgment
E59
Exhaust temp. sensor error(sys2)
Unit stop
E60
Return gas temp. sensor error(sys2)
Cancel the logical judgment
E61
Coil temp. sensor error for cooling(sys2)
Cancel the logical judgment
E62
Reserved
E63 HPS pressure sensor error
Cancel the logical judgment
E64 LPS pressure sensor error
Cancel the logical judgment
E65
High pressure error(sys2)
System 2 stop
E66
Low pressure error(sys2)
System 2 stop
E67
Coil temp. over cool at cooling mode(sys2)
System 2 stop
E68
DC fan motor error(sys2)
System 2 stop
E69
AC current protection(sys2)
System 2 stop
E70
AC voltage protection(sys2)
System 2 stop
E71
DC voltage protection(sys)
System 2 stop
E72
Phase current protection(sys2)
System 2 stop
E73
IPM over heat protection (sys2)
System 2 stop
E74
DC current protection(sys2)
System 2 stop
E75
Exhaust temperature over protection(sys2)
System 2 stop
E76
Coil temp. over heat at cooling mode(sys2)
System 2 stop
E77
Low pressure sensor error(sys2)
System 2 stop
E78
Communication error with driver 2
System 2 stop
D17
IPM over current protection
System 1 stop
D18
Compressor drive error(IPM error excepted)
System 1 stop
D19
Compressor over current
System 1 stop
D20 Reserved
D21 Reserved
D22
IPM over heat protection
System 1 stop
D23
PFC error(driver1)
System 1 stop
D24
DC bus overvoltage(driver1)
System 1 stop
D25
DC bus undervoltage(driver1)
System 1 stop
D26
AC input power is over or under voltage(driver1)
System 1 stop
D27
The AC input power is overcurrent(driver1)
System 1 stop
EN
EN
