Panasonic WH-MHF09G3E5 Service Manual page 114

16.5.30 Outdoor Air Temperature Sensor Abnormality (F36)
Malfunction Decision Conditions:
During startup and operation of heating, the temperatures detected by the outdoor air 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:
Outdoor Intake Air Sensor Characteristic
100
90
80
70
60
50
40
30
20
10
0
-10 0 10 20
Temperature (°C)
Check the CN-TH1 connector connnection:
- Turn OFF the power.
- Check the connector connection.
Is the CN-TH1 connector
connection normal?
Check the outdoor air temperature sensor:
- Plug out connector from the outdoor unit PCB (main).
- Measure the resistance of the outdoor air
temperature sensor.
Is the measured resistance of the
outdoor air temperature sensor
matches the value specified in its
characteristic chart?
30 40 50
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
No
Yes
No
Yes
114
- Connector poor contact.
- Correct the connection.
- Defect in outdoor air temperature
sensor.
- Replace the outdoor air
temperature sensor.
- Defect in outdoor unit PCB (main).
- Replace the outdoor unit PCB (main).