Evaporator Control
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The evaporator temperature is regulated with the help of the evaporator temperature sensor and a controllable expansion valve. The evaporator temperature is set to the predefined specification of 2 °C. Lower temperatures are not possible due to the risk of icing.
If the "variable evaporator control" function has been encoded, the specified evaporator temperature is calculated in the range between 2 and 7 °C. The specification depends on the ambient temperature, the ventilation temperature and the refrigerant pressure. A variable evaporator control reduces dehumidification. This reduces the risk of mucous membranes drying out.