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17.5.15 H37 (Outdoor Liquid Pipe Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor liquid pipe
temperature sensor are used to determine sensor errors.
Malfunction Caused
Faulty connector connection.
Faulty sensor.
Faulty PCB.
Troubleshooting
When abnormality indication starts again
Check the outdoor discharge pipe temperature sensor:
●
Plug out connector from the outdoor unit PCB
●
Measure the resistance of the outdoor discharge pipe
temperature sensor
Is the measured resistance of the outdoor liquid pipe
temperature sensor matches the value specified in its
characteristic chart?
●
Defect in outdoor discharge pipe
●
Replace the outdoor discharge pipe
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?
YES
●
Connector poor contact
●
Correct the connection
NO
NO
YES
temperature sensor
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Caution
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