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14.2.15. Water Tank Top Temperature Sensor Abnormality (F31)
Malfunction Decision Conditions:
During startup and operation of heating, the temperatures detected by the water tank top temperature sensor are used to
determine sensor error.
Malfunction Caused:
1. Faulty connector connection.
2. Faulty sensor.
3. Faulty water tank unit PCB.
Abnormality Judgment:
Continue for 5 seconds.
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