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13.13.4 Sunlight Sensor 
  During ECONAVI operation, the sunlight sensor detects sunlight intensity coming through windows and 
differentiates between sunny and cloudy or night to further optimize energy saving by adjusting the temperature. 
  Sunlight judgment is as following 
 
 
 
13.13.4.1  Sunlight Intensity Reset 
  The sunlight intensity will to reset to zero (no sunlight condition) when 
o  Each time ECONAVI is activated. 
o  Setting temperature is changed. 
o  Operation mode is changed. 
 
13.13.4.2 Judge Sunlight Intensity 
  Based on sunlight sensor output voltage, the sunlight intensity value will be computed and logged to sunlight 
intensity database. 
  The sunlight sensor sensitivity could be adjusted: