49
48°C
56°C
Free
COMP = OFF
4Hz Down / 45 sec.
Min 40 Hz
Fix
Max 70 Hz
Min 40Hz
51°C
54°C
62°C
52°C
13.3.1.5 Low Pressure Prevention Control (Gas Leakage Detection)
• Control start conditions
o For 5 minutes, the compressor continuously operates and outdoor total current is between 1.5A and 1.88A.
o During Cooling and Soft Dry operations:
Indoor heat exchanger temperature is above 20°C.
o During heating operations:
Indoor heat exchanger temperature is below 25°C.
• Control contents
o Compressor stops (and restart after 3 minutes).
o If the conditions above happen 2 times within 20 minutes, the unit will:
Stop operation
Timer LED blinks and “F91” indicated (Refrigeration cycle abnormality).
13.3.1.6 4-Way Valve Failure Protection Control
• During Cooling operation
o 4 minutes after compressor started, if the temperature of the indoor unit heat exchanger exceeds 45°C, the
compressor stops (After 3 minutes, Time delay safety control starts).
o If this situation occurs 4 times within 30 minutes, TIMER LED blinks (F11 error)
• During Heating operation
o 4 minutes after compressor started, if the temperature of the indoor unit heat exchanger drops below 5°C,
the compressor stops (After 3 minutes, Time delay safety control starts).
o If this situation occurs 4 times within 30 minutes, TIMER LED blinks (F11 error)
13.3.2 Protection Control for Cooling & Soft Dry Operation
13.3.2.1 Cooling overload control
• Detects the outdoor pipe temperature and carry below restriction/ limitation (limit the compressor operation
frequency).
• If the outdoor heat exchanger temperature exceeds 52°C during cooling / dry operation, the compressor
frequency is restricted.
• If the compressor if outdoor pipe temperature exceeds 62°C.
• If the compressor stops 4 times within 20 minutes, TIMER LED blinks (F95: outdoor high pressure rise
protection)
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