Panasonic WH-MHF12G9E8 Service Manual page 114
(mono bloc) air-to-water heat pump system
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Also See for WH-MHF12G9E8:
- Planning and installation manual (117 pages) ,
- Operating instructions manual (100 pages)
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16.5.26 Four Way Valve Abnormality (F25)
Malfunction Decision Conditions:
During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0°C.
Malfunction Caused:
1
Faulty sensor.
2
Faulty connector connection.
3
Faulty outdoor unit PCB (noise filter/main).
4
Faulty four way valve.
Abnormality Judgment:
Continue 4 times in 30 minutes.
114
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