Air Distribution Flaps

Operation
All air distribution flaps are set corresponding to the flap programs by means of stepper motors. The left/right control value is calculated from the input data (outside temperature, heater temperatures, evaporator temperature, interior temperature, control wheel settings, push button settings etc.) and a corresponding flap program selected. For safety reasons, the defrost flap program is set before the IHKA control unit switches off after approximately 3 minutes ignition "OFF" (defect code memory is cleared) and its power consumption reduced.