191
19.5.2 Compressor Tank Temperature Sensor Abnormality (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?
Is the measured resistance of the
compressor tank temperature sensor
matches the value specified in its
characteristic chart?
Troubleshooting:
No
No
Yes
Yes
Temperature (° C)
Res
ist
an
ce
(K
)