SERVICE BY QUALIFIED TECHNICIANS
Error
Code
Possible Cause
Action
E23
Ambient temperature is too low at heating mode
Unit stop
E24
Ambient temperature is too low at cooling mode
Unit stop
E25
Coil temp. over cool at cooling mode
Unit stop
E26
DC fan motor error
Unit stop
E27
B phase reversal fault
Unit stop
E28
C phase reversal fault
Unit stop
E29
eeprom reading error
Restore the default, restart
E30
The probation period is up
Unit stop, antifreezing
E31
Power on password error
Unit stop, antifreezing
E32
Reserved
E33
Reserved
E34
Reserved
E35
Reserved
E36
Reserved
E37
IPM protection
Unit stop
E38
Driver protection
Unit stop
E39 Reserved
E40
Reserved
E41
Reserved
E42
Reserved
E43
Reserved
E44
Reserved
E45
Reserved
E46
Reserved
E47
Reserved
E48
Reserved
E49
Water inlet sensor error
Replace logical judgment
with water outlet temp.
E50
Coil temp. sensor error for heating
Cancel the logical judgment
E51
Exhaust temp. sensor error
Unit stop
E52
Return gas temp. sensor error
Cancel the logical judgment
E53
Coil temp. sensor error for cooling
Replace logical judgment
with water outlet temp.
EN
EN