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109
16.5.17 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).
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).
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