Panasonic WH-SDF09C3E5 Service Manual page 111
Air-to-water heatpump
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Also See for WH-SDF09C3E5:
- Service manual (146 pages) ,
- Design handbook (132 pages) ,
- Operating instructions manual (92 pages)
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17.5.16 Outdoor High Pressure Switch Activate (F12)
Malfunction Decision Conditions:
During operation of heating, when pressure 4.5MPa and above is detected by outdoor high pressure switch.
Malfunction Caused:
1
Faulty water pump.
2
Insufficient water flow rate in system.
3
Water leak in system.
4
3 way valve closed.
5
Clogged expansion valve or strainer.
6
Excessive refrigerant.
7
Faulty outdoor high pressure sensor and switch.
8
Faulty outdoor unit PCB.
Abnormality Judgment:
Continue 4 times in 20 minutes.
111
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