80
14.2 Protection Control For Cooling & Soft Dry Operation
14.2.1 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.
The compressor will be stopped to avoid compressor overloading.
14.2.2 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 141.8°F (61°C).
If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95 indicated: outdoor high pressure rise
protection).
14.2.3 Freeze 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.
14.2.4 Freeze 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
o
Either one of the conditions above occurs 5 times in 60 minutes.
Control
contents
o
Operation
stops
o
Timer LED blinks and “H99” indicated
Limited Frequency
Free
77°F (25°C)
71.6°F (22°C)
Outdoor
Air
Temperature
Comp. OFF
Comp. ON
0°F (-17.8°C)
-4.0°F (-20°C)
Outdoor
Air Temperature
