79
13. Protection Control
(For A9/12MK)
13.1 Restart Control (Time Delay Safety Control)
• When the thermo-off temperature (temperature which compressor stops to operate) is reached during: -
o Cooling/Heating operation - the compressor stops for 3 minutes (minimum) before resume operation.
o Soft Dry operation - the compressor stops for 6 minutes (minimum) before resume operation.
• If the operation is stopped by the remote control, the compressor will not turn on within 3 minutes from the
moment operation stop, although the unit is turn on again within the period.
• This phenomenon is to balance the pressure inside the refrigerant cycle.
13.2 7 Minutes Time Save Control
• The compressor will start automatically if it has stopped for 7 minutes and the intake air temperature falls
between the compressor ON temperature and compressor OFF temperature during the period.
• This phenomenon is to reduce the built up humidity inside a room.
13.3 60 Seconds Forced Operation
• Once the air conditioner is turned on, the compressor will not stop within 60 seconds in a normal operation
although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the
OFF/ON operation button at the remote control is permitted.
• The reason for the compressor to force operate at minimum 60 seconds is to allow the refrigerant oil run in a full
cycle and return back to the outdoor unit.
13.4 Starting Current Control
• When the compressor, outdoor fan motor and indoor fan motor are simultaneously started, the indoor fan motor
will start to operate at 1.6 second later.
• The reason of the difference is to reduce the starting current flow.
13.5 Freeze Prevention Control
• To protect indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form return to
compressor.
• This control will activate when the temperature of indoor heat exchanger falls below 2°C continuously for more
than 4 minutes.
• The current fan speed will change to freeze prevention speed after 70 seconds compressor on. When indoor pipe
temperature reaches certain temperature for 5 sec. the speed will be increased as in below figure.
• Compressor will turn off when indoor temperature falls below 2°C for more than 4 minutes. It will restart again
when indoor heat exchanger temperature rises to 10°C.
• Restart control (Time Delay Safety Control) will be applied in this control.
To Next Page
Loading...
