Panasonic WH-MXF09D3E8 Service Manual page 105

16.5.30 Outdoor Pipe Temperature Sensor Abnormality (F42)
Malfunction Decision Conditions:
During startup and operation of heating, the temperatures detected by the outdoor pipe 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.
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