Panasonic WH-SDC09H3E8 Service Manual page 171

16.5.11 Abnormal Zone 1 Sensor (H43)
1 Faulty connector connection.
2 Faulty buffer tank sensor.
3 Faulty indoor sub PCB.
Abnormality Judgment:
Continue for 5 seconds.
Troubleshooting:
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
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Caution
YES
YES
171
NO
● Poor contact
● Correct connection
NO
● ● Defective zone sensor Defective zone sensor
● Replace sensor