Panasonic WH-SDC03H3E5 Service Manual page 171
Air-to-water heatpump
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Also See for WH-SDC03H3E5:
- Menu manual (88 pages) ,
- Operating instructions manual (108 pages) ,
- Service manual (30 pages)
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16.5.26 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).
171
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