13. Protection Control
13.1 Freeze 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.
13.2 Dew Prevention control (Cool)
∙When received dew prevention signal from indoor unit, which according to indoor intake temperature and indoor heat exchanger temperature the compressor frequency changes.
13.3 Electronic 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 5.0A.
∙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.
13.4 Electronic 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 conditions
o When total current is back to normal region.
∙During this control, outdoor fan speed does not reduce for Quiet operation.
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