The active charcoal filter must be replaced (without recirculation box).
If the cooker hood is being operated in Extraction mode, reset only the operating hours counter.
If the cooker hood is being operated in Recirculation mode, replace the active charcoal filter:
Remove the cover grille.
Remove the grease filter.
Remove the active charcoal filter.
Reset the operating hours counter:
Touch the sensor control for 3 seconds.
The sensor control will go out.