Panasonic WH-MDF09C3E8 Service Manual page 85

Air-to-water heatpump system
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16.5.7 Outdoor High Pressure Abnormality (H64)
Malfunction Decision Conditions:
During operation of heating, when the outdoor high pressure sensor output signal is 0Vdc or 5Vdc.
Malfunction Caused:
1
Faulty connector connection.
2
Faulty sensor.
3
Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue 4 times in 20 minutes.
85

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