Panasonic WH-SDF09C3E5 Service Manual page 110
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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17.5.15 Indoor Freeze-up Protection (H99)
Malfunction Decision Conditions:
During anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature < 0°C.
Malfunction Caused:
1
Faulty water pump.
2
Insufficient water flow rate in system.
3
Water leak in system.
4
2 way valve partially closed.
5
Clogged expansion valve or strainer.
6
Refrigerant shortage (refrigerant leakage).
7
Faulty indoor refrigerant liquid temperature sensor.
8
Faulty indoor unit PCB (main).
110
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