Panasonic WH-ADC0309H3E Service Manual page 151

17.5.2 Compressor Tank Temperature Sensor Abnormality (H15)
Malfunction Decision Conditions:
During startup and operation of cooling and heating, the temperatures detected by the compressor tank
temperature sensor are used to determine sensor error.
Malfunction Caused:
1 Faulty connector connection.
2 Faulty sensor.
3 Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue for 5 seconds.
Troubleshooting:
Compressor Tank / Compressor Discharge
Sensor Characteristic
350
300
250
200
150
100
50
0
-10 0 10 20 30
Temperature (° C)
Check the CN-TANK connector connection:
- Turn OFF the power.
- Check the connector connection.
Is the CN-TANK connector
connection normal?
Check the compressor tank temperature sensor:
- Plug out connector from the outdoor unit PCB (main).
- Measure the resistance of the compressor tank
temperature sensor.
Is the measured resistance of the
compressor tank temperature sensor
matches the value specified in its
characteristic chart?
40 50
No
Yes
No
Yes
151
- Connector poor contact.
- Correct the connection.
- Defect in compressor tank
temperature sensor.
- Replace the compressor tank
temperature sensor.
- Defect in outdoor unit PCB (main).
- Replace the outdoor unit PCB (main).