Panasonic WH-ADF0309J3E5CM Service Manual page 255

25.2.9 Abnormal Zone 1 Sensor (- / - / H43)
Malfunction Caused:
1 Faulty connector connection.
2 Faulty buffer tank sensor.
3 Faulty indoor sub PCB.
Abnormality Judgment:
Continue for 5 seconds.
Abnormal zone 1 sensor
Check the turn off power check connector connection
Normal?
Check plug out connector from zone 1 connector sub PCB in
the PCB measure resistance of zone 1 sensor characteristic
match?
● Defective PCB
● Replace PCB
YES
YES
Caution
NO
● Poor contact
● Correct connection
NO
● ● Defective zone sensor Defective zone sensor
● Replace sensor
255
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.