# Automatic filter cleaning (see figure H)

When automatic filter cleaning (AFC) is active, the flat-pleated filter (24) is cleaned every 15 seconds using blasts of air (pulsating noise).

The filter cleaning function should be used regularly, and at the very latest when the suction power is no longer sufficient.

Regular use of the filter cleaning function will increase the service life of the filter.

In order to achieve an optimum filter service life, deactivate the automatic filter cleaning function only in exceptional cases, e.g. when vacuuming pure liquids or using a paper filter bag.

A flat-pleated filter with surface dirt is still fully functional. It is not necessary to clean the flat-pleated filter manually by shaking or blowing it out; this may even damage the filter.

Note: The automatic filter cleaning function is switched on by default when the dust extractor leaves the factory.

It is only possible to switch the automatic filter function on or off when the tool is switched on.

- Deactivating AFC
  Press the AFC button (3).
  The control LED (33) will go out.
- Activating AFC
  Press the AFC button (3).
  The control LED (33) will light up green.