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Error Code Display
1. Should there be any fault happen with the main board, the relevant error code
will be shown on the error display area and symbol
ERR
will light up.
2. If there are multiple faults happening at the same time, the error codes will be
shown one after another.
3. The error codes are:
Fault Error
code
Remarks
Room sensor #1 failure 1 Main board AD3
Room sensor #2 /LST sensor #2 failure 2 Main board AD4
Room sensor #3 /Indoor coil sensor #2 failure 3 Main board AD5
Room sensor #4 /Discharge sensor #1 failure 4 Main board AD6
#1 indoor coil sensor failure 5 Main board AD1
#1 LST sensor failure 6 Main board AD2
#1 insufficient of refrigerant 7
#1 compressor overload 8
low pressure failure 9
high pressure failure 10
Room sensor #5 failure 11 At wallpad B
Room sensor #6 failure 12 At wallpad A
All room sensor failure 13
Float switch failure 14
#1 Low safety thermostat failure 15
Communication failure 16
Hydronic pump switch failure 17
#2 insufficient of refrigerant 18
#2 compressor overload 19
#2 Low safety thermostat failure 20
Discharge sensor 1 failure 21
Discharge sensor 2 failure 22
Discharge temp 1 failure 23
Discharge temp 2 failure 24
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