3-78
Check code
Operation cause
[A0]
TD1 sensor alarm
TD1 sensor open/short
Open/short of TD1 sensor was detected. Check disconnection of connector (TD1 sensor : CN502) and
characteristics of sensor resistance value.
When sensor is normal, replace interface P.C. board of the outdoor unit.
Check code
Operation cause
[A1]
TD2 sensor alarm
TD2 sensor open/short
Open/short of TD2 sensor was detected. Check disconnection of connector (TD2 sensor : CN503) and
characteristics of sensor resistance value.
When sensor is normal, replace interface P.C. board of the outdoor unit.
Check code
Operation cause
[A2]
TS1 sensor alarm
TS1 sensor open/short
Open/short of TS1 sensor was detected. Check disconnection of connector (TS1 sensor : CN504) and
characteristics of sensor resistance value.
When sensor is normal, replace interface P.C. board of the outdoor unit.