229
19.5.40 Outdoor Air Temperature Sensor Abnormality (F36)
Malfunction Decision Conditions:
During startup and operation of cooling and 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:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Outdoor Intake Air Sensor Characteristic
-10
0
10
20
30
40
50
50
60
70
80
90
100
40
30
10
20
0
Temperature (°C)
Resis
tance
(K
)
No
No
Yes
Yes
Check the CN-TH1 connector connnection:
- Turn OFF the power.
- Check the connector connection.
- 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).
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 CN-TH1 connector
connection normal?
Is the measured resistance of the
outdoor air temperature sensor
matches the value specified in its
characteristic chart?
Caution