SiBE07-618_D TroubleshootingService Diagnosis 614.3 Freeze-up Protection Control or Heating Peak-cutControlRemoteControllerDisplayA5Method ofMalfunctionDetection 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.)MalfunctionDecisionConditions 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
