Filter change function
Replace the air filter when B bar is completely filled (red).
![](../Images/png/355957003__Web.png)
![](../Images/png/355958923__Web.png)
- Fold up the design cover of the device [A] or remove it [B].
- Remove the air filter [2] and replace it.
- Place the filter mat on the intake grille of the upper housing part [3] and replace the cover [1]. The cover must audibly click into place.
- Remove used timestrip.
- Stick on a new timestrip.
- Press activation button A.
- The red dye in the interior of the bar B is released. The bar indicator first fills slightly. Within the next 6 months, the B bar indicator will rise to the upper edge (indicator value 6).