Panasonic WH-UD07CE5-A Service Manual page 99
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- Service manual (166 pages) ,
- Operating instructions manual (92 pages) ,
- Service manual (142 pages)
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17.5.14. 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).
99
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