SiBE04-624_B TroubleshootingService Diagnosis 872.9 Freeze-up Protection Control or Heating Peak-cutControlError Code A5Method of ErrorDetection Freeze-up protection controlDuring cooling operation, the freeze-up protection control (operation halt) is activatedaccording to the temperature detected by the indoor heat exchanger thermistor. Heating peak-cut controlDuring heating operation, the temperature detected by the indoor heat exchanger thermistoris used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)Error DecisionConditions Freeze-up protection controlDuring cooling operation, the indoor heat exchanger temperature is below 0°C. Heating peak-cut controlDuring heating operation, the indoor heat exchanger temperature is above 65°CSupposedCauses 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 Dehumidifying solenoid valve remains closed (on cooling operation)
