Thermistor Or Related Abnormality (Outdoor Unit) - Daikin FLKS25BAVMB Service Manual

SiENBE05-722_A

3.19 Thermistor or Related Abnormality (Outdoor Unit)

H9, J3, J6, P4
Remote Control
Display
Method of This fault is identified based on the thermistor input voltage to the microcomputer.
Malfunction A thermistor fault is identified based on the temperature sensed by each thermistor.
Detection
„ The thermistor input voltage is above 4.96 V or below 0.04 V with the power on.
Malfunction
„ J3 error is judged if the discharge pipe temperature is lower than the heat exchanger
Decision
Conditions
„ Disconnection of the connector for the thermistor
Supposed
„ Defective thermistor
Causes
„ Defective heat exchanger thermistor in the case of J3 error (outdoor heat exchanger
„ Defective outdoor unit PCB
„ Defective indoor unit PCB
Service Diagnosis
temperature.
thermistor in cooling operation, or indoor heat exchanger thermistor in heating operation)
Troubleshooting
89