282
25.2.35 Outdoor Air Temperature Sensor Abnormality (H27 / F08 / 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
When abnormality indication starts again
Check the outdoor air temperature sensor:
●
Plug out connector from the outdoor unit PCB
●
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?
●
Defect in outdoor air temperature sensor
●
Replace the outdoor air temperature sensor
●
Defect in outdoor unit PCB
●
Replace the outdoor unit PCB
Check the connector connection:
●
Turn off the power
●
Check the connector connection
Is the connector connection normal?
●
Connector poor contact
●
Correct the connection
YES
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
NO
NO
YES
Caution
Sensor (Thermistor)
Characteristics
70
60
50
40
30
20
10
0
1
2
Outdoor Air Sensor
Outdoor Heat
Exchanger Sensor
1
2
-10 0 10 20 30 40 50
Temperature (°C)
Resistance (kΩ)
To Next Page
Loading...
