Panasonic WH-MDF12C6E5 Service Manual page 96

(mono bloc) air-to-water heatpump system
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16.5.25 Outdoor High Pressure Switch Abnormal (F27)
Malfunction Decision Conditions:
During compressor stop, and outdoor high pressure switch is remain opened.
Malfunction Caused:
1
Faulty connector connection.
2
Faulty switch.
3
Faulty outdoor unit PCB (main).
Abnormality Judgment:
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96

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