Panasonic WH-MDF12C6E5 Service Manual page 91
(mono bloc) air-to-water heatpump system
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Also See for WH-MDF12C6E5:
- Design handbook (132 pages) ,
- Installation manual (90 pages) ,
- Operating instructions manual (76 pages)
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16.5.20 Compressor Overheating (F20)
Malfunction Decision Conditions:
During operation of heating, when temperature above 112°C is detected by the compressor tank temperature
sensor.
Malfunction Caused:
1
Faulty compressor tank temperature sensor.
2
2/3 way valve closed.
3
Refrigerant shortage (refrigerant leakage).
4
Clogged expansion valve or strainer.
5
Faulty outdoor unit PCB (main).
6
Faulty compressor.
Abnormality Judgment:
Continue 4 times in 30 minutes.
91
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