Panasonic WH-ADF0309J3E5CM Service Manual page 260

25.2.14 Abnormal External Thermistor 2 (- / - / H68)
Malfunction Caused:
1 Faulty connector connection.
2 Faulty room temperature zone 2 sensor.
3 Faulty indoor sub PCB.
Abnormality Judgment:
Continue for 5 seconds.
Abnormal external thermistor 2
Check connector CN205 on sub PCB normal?
Check resistance of external thermistor 2 compare against
characteristic of external thermistor same?
Change sub PCB
YES
YES
260
For safety reason and to prevent
component breakdown, always switch
Caution
off the power before remove and
connect the component.
NO
● Correct external thermistor 2 sensor
connector
NO
● Change external thermistor 2