13.1.5. Compressor Overheating Prevention Control
•Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below.
•If compressor discharge temperature exceeds 112°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking. (“F97” is indicated.)
13.1.6. Low Pressure Prevention Control (Gas Leakage Detection)
a. Control start conditions
•For 5 minutes, the compressor continuously operates and outdoor total current is between 0.6A and 1.15A.
•During Cooling and Soft Dry operations:
Indoor suction temperature - indoor piping temperature is below 4°C.
•During Heating operations :
Indoor piping temperature - indoor suction is under 5°C. b. Control contents
•Compressor stops (and restart after 3 minutes).
•If the conditions above happen 2 times within 20 minutes, the unit will:
-Stop operation
-Timer LED blinks and “F91” indicated.
13.1.7. Low Frequency Protection Control 1
•When the compressor operate at frequency lower than 25 Hz continued for 240 minutes, the operation frequency will be changed to 24 Hz for 2 minutes.
13.1.8. Low Frequency Protection Control 2
• When all the below conditions comply, the compressor frequency will change to lower frequency.
Temperature, T, for: | Cooling/Soft Dry | Heating |
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Indoor intake air (°C) | T < 14 or T | 30 | T < 14 or T | 28 |
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Outdoor air (°C) | T < 13 or T | 38 | T < 4 or T | 24 |
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Indoor heat exchanger (°C) | T < 30 |
| T 0 |
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