13.1.9. 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 (θC) | T < 15 or T |
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| 30 | |||||||
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Outdoor air (θC) | T < 16 or T |
| T < 4 or T |
| 24 | |||
| 38 |
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Indoor heat exchanger (θC) | T < 30 |
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| 0 | ||||
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13.2. Protection Control For Cooling & Soft Dry Operation
13.2.1. Outdoor Air Temperature Control
•The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
•This control will begin 1 minute after the compressor starts.
•Compressor frequency will adjust base on outdoor air temperature.
13.2.2. Cooling Overload Control
•Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
•The compressor stop if outdoor pipe temperature exceeds 61θC
•If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95 indicated: outdoor high pressure rise protection)
13.2.3. Freeze Prevention Control
1.When indoor heat exchanger temperature is lower than 0θC continuously for 6 minutes, compressor will stop operating.
2.Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 13θC.
3.At the same time, indoor fan speed will be higher than during its normal operation.
4.If indoor heat exchanger temperature is higher than 13θC for 5 minutes, the fan speed will return to its normal operation.
13.2.4. Dew Prevention Control 1
•To prevent dew formation at indoor unit discharge area.
•This control will be activated if:
-Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled.
-When Cooling or Dry mode is operated more than 20 minutes or more.
•This control stopped if:
-Compressor stopped.
-Remote control setting changed (fan speed / temperature).
-Outdoor air temperature and indoor intake temperature changed.
•Fan speed, angle of louver (vertical airflow angle) will be adjusted accordingly in this control.
-Fan speed will be increased slowly if the unit is in quiet mode but no change in normal cooling mode.
-The angle of horizontal louver will be changed as table below:
Operation Mode | Airflow Direction |
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| 1 | 2 |
| 3 |
| 4 | 5 |
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Cooling and | Auto |
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| 22 ~ 30 |
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| Manual | 22 | 24 |
| 26 |
| 28 | 30 |
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