13.2 Protection Control For Cooling & Soft Dry Operation
13.2.1Outdoor 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.
13.2.2Cooling 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 141.8°F (61°C).
If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95 indicated: outdoor high pressure rise protection).
13.2.3Freeze Prevention Control 1
When indoor heat exchanger temperature is lower than 32°F (0°C) continuously for 6 minutes, compressor will stop operating.
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 41°F (5°C).
At the same time, indoor fan speed will be higher than during its normal operation.
If indoor heat exchanger temperature is higher than 41°F (5°C) for 5 minutes, the fan speed will return to its normal operation.
13.2.4Freeze Prevention Control 2
Control start conditions
o During Cooling operation and soft dry operation
During thermo OFF condition, indoor intake temperature is less than 50°F (10°C) or
Compressor stops for freeze prevention control
oEither one of the conditions above occurs 5 times in 60 minutes.
Control contents
oOperation stops
oTimer LED blinks and “H99” indicated
13.2.5Dew Prevention Control 1
To prevent dew formation at indoor unit discharge area.
This control will be activated if:
o Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled. o When Cooling or Dry mode is operated more than 20 minutes or more.
This control stopped if:
o Compressor stopped.
o Remote control setting changed (fan speed / temperature).
o Outdoor air temperature and indoor intake temperature changed.
Fan speed will be adjusted accordingly in this control.
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