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17.4.4 H15 (Compressor Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor
temperature sensor are used to determine sensor errors.
Malfunction Caused
Faulty connector connection.
Faulty sensor.
Faulty PCB.
Troubleshooting
When abnormality indication starts again.
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
Connector poor contact.
Correct the connection.
Defect in outdoor compressor temperature sensor.
Replace the outdoor compressor temperature sensor.
Defect in outdoor unit PCB.
Replace the outdoor unit PCB.
Turn off the power.
Check the connector connection.
YES
YES
0
10
20
20 40 60 80 100 120 140
30
40
50
60
70
Temperature (°C)
Resistance (K)
Compressor Temp. Sensor
(Thermistor) Charateristics
Check the connector connection:
Plug out connector from the outdoor unit PCB.
Measure the resistance of the outdoor compressor
temperature sensor.
Check the outdoor compressor temperature sensor:
Is the connector connection normal?
Is the measured resistance of the outdoor compressor
temperature sensor matches the value specified in its
characteristic chart?
NO
NO
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