Panasonic WH-SDC09H3E8 Service Manual page 201

16.5.41 Outdoor Discharge Pipe Temperature Sensor Abnormality (F40)
Malfunction Decision Conditions:
During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe
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:
Caution
Check the CN-DIS connector connection:
- Turn OFF the power
- Check the connector connection
Is the CN-DIS connector
connection normal?
Check the outdoor discharge pipe temperature sensor:
- Plug out connector from the outdoor unit PCB (main)
- Measure the resistance of the outdoor discharge
pipe temperature sensor
Is the measured resistance of the
outdoor discharge pipe temperature
sensor matches the value specified
in its characteristic chart?
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
No
Yes
No
Yes
201
- Connector poor contact
- Correct the connection
- Defect in outdoor discharge pipe
temperature sensor
- Replace the outdoor discharge pipe
temperature sensor
- Defect in outdoor unit PCB (main)
- Replace the outdoor unit PCB (main)