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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 failure 2 Main board AD4
Room sensor #3 failure 3 Main board AD5
Room sensor #4 failure 4 Main board AD6
#1 indoor coil sensor failure 5 Main board AD1
#1 outdoor coil sensor failure 6 Main board AD2
#1 insufficient of refrigerant 7
#1 compressor overload 8
#1 low pressure failure 9
#1 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
Water pump/float switch failure 14
Low safety thermostat failure 15
Communication failure 16
Hydronic pump switch failure 17
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