The program calculates the inside and outside dew points every 10 seconds. If the inside dewpoint is above 6.3degC, dehumidification is needed.
(operating mode: LUEFT): The fans are switched on when the outside dewpoint is 5degC below the inside dewpoint.
(operating mode: ENTF): If the outside air is not suitable to dry the basement, a dehumidifier is started. While it is running, the condensate is collected in a reservoir with a level switch and a pump.