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25.2.2 Compressor Tank Temperature Sensor Abnormality (H15 / F04 / H15)
Malfunction Decision Conditions:
During startup and operation of cooling and heating, the temperatures detected by the compressor tank
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.
- Connector poor contact.
- Correct the connection.
- Defect in compressor tank
temperature sensor.
- Replace the compressor tank
temperature sensor.
- Defect in outdoor unit PCB (main).
- Replace the outdoor unit PCB (main).
Check the CN-TANK connector connection:
- Turn OFF the power.
- Check the connector connection.
Check the compressor tank temperature sensor:
- Plug out connector from the outdoor unit PCB (main).
- Measure the resistance of the compressor tank
temperature sensor.
Compressor Tank / Compressor Discharge
Sensor Characteristic
-10 0 10 20 30 40 50
350
300
250
200
150
100
50
0
Is the CN-TANK connector
connection normal?
Isthemeasuredresistanceofthe
compressor tank temperature sensor
matches the value specified in its
characteristic chart?
roubleshooting:
No
No
Yes
Yes
Temperature (° C)
Resistance (K)
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