12. Protection Control
12.1Freeze Prevention control (Cool)
•When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heat exchanger temperature.
•When indoor unit request capability OFF due to freeze condition , immediately the capability supply to targeted indoor unit stops.
12.2Dew Prevention control (Cool)
•When received dew prevention signal from indoor unit, the compressor frequency changes according to indoor intake temperature and indoor heat exchanger temperature.
12.3Electronic Parts Temperature Rise Protection 1 (Cool)
•This control prevents electronic parts temperature rise during cooling overload condition.
•Start conditions:
o Outdoor ambient temperature is at protection region as shown in figure below:
oOutdoor unit total current is above 5.5A
•Control content
oOutdoor fan speed is adjusted accordingly.
•Control stop condition
oWhen outdoor ambient temperature is back to normal region.
•During this control, outdoor fan speed does not reduce for Quiet operation.
12.4Electronic Parts Temperature Rise Protection 2 (Cool)
•This control prevents electronic parts temperature rise during cooling/dry operation.
•Start conditions:
o Total current is at protection region as shown in figure below:
•Control content
o Outdoor fan speed is adjusted accordingly.
•Control stop condition
o When total current is back to normal region.
•During this control, outdoor fan speed does not reduce for Quiet operation.
21
