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3. Hot Start 
When the heating operation starts, the indoor fan stops and the compressor run with a certain frequency. 
This is to prevent the cold airflow from blowing. 
If the piping temperature rises to 19 ℃, and the indoor fan speed and airflow direction varies with the indoor piping 
temperature, the hot start control is completed.
 
13.3.2  Overload Protection Control 
The frequency for the compressor is determined by indoor piping temperature. 
 
    
 
               CU-RE9NKR                                 CU-RE12NKR 
 
 
13.3.3  Demand Control 
  When the air-conditioner connected to Demand Response Enabling Devices (DRED), the power 
consumption especially during peak hours could be controlled. 
 
 
 
 
 
 
 
 
 
  Three Demand response modes (DRM) are available 
 
  DRM1 = Compressor cut off 
  DRM2 = Operate at 50% of rated input power 
  DRM3 = Operate at 75% of rated input power 
 
  During DRM, the Power Indicator blinks (3 seconds ON and 0.5 seconds OFF)