Troubleshooting
SiMT041311E
135
Service Diagnosis
2.10 Freeze-up Protection Control / Heating Peak-cut Control
Error Code
A5
Method of Error
Detection
Freeze-up protection control
During cooling operation, the freeze-up protection control (operation halt) is activated
according to the temperature detected by the indoor heat exchanger thermistor.
Heating peak-cut control
During heating operation, the temperature detected by the indoor heat exchanger thermistor
is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)
Error Decision
Conditions
Freeze-up protection control
During cooling operation, the indoor heat exchanger temperature is below 0°C.
Heating peak-cut control
During heating operation, the indoor heat exchanger temperature is above 54.5°C
Supposed
Causes
Short-circuited air
Clogged air filter of the indoor unit
Dust accumulation on the indoor heat exchanger
Defective indoor heat exchanger thermistor
Defective indoor unit PCB (A1P)