Panasonic WH-UD07JE5 - Page 234

234
19.5.45 Outdoor Defrost Temperature Sensor Abnormality (F43)
Malfunction Decision Conditions:
During startup and operation of cooling and heating, the temperatures detected by the outdoor defrost
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:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Outdoor Pipe / Outdoor Defrost Sensor
Characteristic
-10 0 10 20 30 40 50
15
20
25
30
10
5
0
Temperature (°C)
Resistance (K )
No
No
Yes
Yes
Check the CN-TH2 connector connnection:
- Turn OFF the power.
- Check the connector connection.
- Connector poor contact.
- Correct the connection.
- Defect in outdoor defrost
temperature sensor.
- Replace the outdoor defrost
temperature sensor.
- Defect in outdoor unit PCB (main).
- Replace the outdoor unit PCB (main).
Check the outdoor defrost temperature sensor:
- Plug out connector from the outdoor unit PCB (main).
- Measure the resistance of the outdoor defrost
temperature sensor.
Is the CN-TH2 connector
connection normal?
Is the measured resistance of the
outdoor defrost temperature sensor
matches the value specified in its
characteristic chart?
Caution