Thermistor Or Related Abnormality (Outdoor Unit) - Daikin FTKS25BVMB Service Manual

SiBE04-302
4.14

Thermistor or Related Abnormality (Outdoor Unit)

P4, J3, J6, H9
Remote
Controller
Display
Method of This type of error is detected by checking the thermistor input voltage to the microcomputer.
Malfunction [A thermistor error is detected by checking the temperature.]
Detection
Malfunction The thermistor input is above 4.96 V or below 0.04 V with the power on.
Error J3 is judged if the discharge pipe thermistor temperature is smaller than the condenser
Decision
thermistor temperature.
Conditions
Supposed
Causes
Service Diagnosis
Connector in poor contact
Thermistor defective
Outdoor unit PCB defective
Indoor unit PCB defective
Condenser thermistor defective in the case of J3 error (outdoor unit heat exchanger
thermistor in the cooling mode, or indoor unit heat exchanger thermistor in the heating
mode)
Troubleshooting
107