SiBE04-624_B TroubleshootingService Diagnosis 1312.39 Heater Wire AbnormalityError Code PAMethod of ErrorDetectionAn error is identified when the outlet temperature of humidifying fan does not reach a certaintemperature within a given time after the heater is turned on.Error DecisionConditionsWhen the temperature detected by the humidifying thermistor is lower than the outdoortemperature (with the heater turned off) + 6°C, and this condition continues for 30 minutes.SupposedCauses Breakage of heater filament Breakage of heater harness Abnormal temperature detected by outdoor temperature thermistor Abnormal temperature detected by humidifying thermistor Defective main relay Blown thermal fuse Defective heater control part Extremely low voltageTroubleshootingCheck No.01Refer to P.134(R18135)CautionYESYESYESIs the supply voltageappropriate?Turn off the power supply.YESNONONONOIs the heaterresistanceappropriate?At normal temperature:44.6 Ω ± 10%Is the thermal fuse blown?NOYESCheck No.01Is a resistance of thehumidifying thermistorappropriate?Is the heater well cooled?Cool theheater down.Measure the resistancebetween the heater connectors.Be sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.Modify the supply voltage.Replace the heater ASSY.Replace the heater ASSY.Replace the thermistor.*For details, refer to PHtroubleshootingReplace the indoor unitPCB (control PCB).*Main relay may bedamaged.When the main relay(MRM10) is damaged,heater and rotor do not run.
