The system assumes recirculating air mode after the recirculating air button is pressed. The fresh air inlet is closed and the recirculating air channel opened. Recirculated air mode is indicated by an LED in the recirculated air button.
The fresh air/recirculating air flap (a total of 3 individual flaps) is powered by an actuator. There is 1 flap at the fresh air inlet and 2 flaps for recirculating air control. The actuator for the fresh air/recirculating air flap adjusts these 3 individual flaps by means of a coupling linkage. Its position is determined based on the activation of 4 phases.