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18.4.7 H23 (Indoor Pipe Temperature Sensor 1 Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger
temperature sensor are used to determine sensor errors.
Malfunction Caused
Faulty connector connection.
Faulty sensor.
Faulty PCB.
Troubleshooting
Check the indoor air temperature sensor:
Is the measured resistance of the indoor intake air
temparature sensor matches the value specified in its
charactetistic chart?
•
Plug out connector from the indoor unit PCB
•
Measure the resistance of the indoor intake air
temperature sensor
•
Defect in indoor intake air temperature sensor
•
Replace the indoor intake air temperature
sensor
•
Defect in indoor unit PCB
•
Replace the indoor unit PCB
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