Table of Contents
Advertisement
14. Protection Control
(For A9/12PK)
14.1 Restart Control (Time Delay Safety Control)
•
When the thermo-off temperature (temperature which compressor stops to operate) is reached during: -
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.
o
•
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.
14.2 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.
14.3 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.
14.4 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.
14.5 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.
83
Advertisement
Table of Contents
