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● If the set value is exceeded again within 30 seconds, the operation will restart after one minute.
● If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
● Error code [F99] will be displayed.
1. Overheating protection control
When the IPM temperature rises to 120 ℃ , compressor will stop immediately.
Compressor restarts after three minutes if the temperature decreases to 110℃
13.1.5 Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The change of
frequency is as below.
CS/CU-LE9NKD CS/CU-LE12NKD
13.1.6 Low Operation Frequency Protection Control
●
When the compressor operation frequency is lower than 24Hz and continuing for 240 minutes, the operation
frequency will be changed to 23Hz for 2 minutes. This is to prevent the compressor running in too low frequency for
long time.
●
If all following conditions are fulfilled, the compressor will run in frequency of 30 Hz .
Models LE9NKD, LE12NKD
Intake Air Temp.
≥30 ℃ or ＜14 ℃ ≥28 ℃ or ＜14 ℃
Outdoor Temp.
≥38 ℃ or ＜16 ℃ ≥24 ℃ or ＜4 ℃
Indoor Piping Temp.
＜30 ℃ ≥0 ℃
Operation Mode Cool / Dry Heat
13.1.7 Low pressure Prevention control (Gas Leakage Detection)
a. Control start conditions
• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.83A and 1.05A.
• During Cooling and Soft Dry operations:
Indoor suction temperature – indoor piping temperature is below 4℃.
Indoor temperature and outdoor temperature is 30±5℃.
Remote Control setting 16℃ and Hi Fan Speed.
• During Heating operations:
Indoor piping temperature – indoor suction is under 5℃.
Indoor temperature and outdoor temperature is 20 ± 2℃.
Remote control setting 30℃ and Hi Fan Speed.
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
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