Replacing the pre-filter

The filter pad is the most important element. When replaced regularly, the service life of the pre-filter is prolonged. Cleaning the filter pad with compressed air or a hammer is not permitted. The filter pad must be replaced.

  1. Set the <I/0> switch to <0>.

  2. Pull out the mains plug.

  3. Unlock and open the service door using a square wrench.

  4. Remove the pre-filter.
  6. Remove the spring clamp and filter pad from the filter grill.
  8. Dispose of the filter pad in accordance with local laws and directives.

  9. Insert a new filter pad into the filter grill.
  11. Insert the spring clamp.

  12. Insert the pre-filter in the housing.
  14. Close the service door and lock it using a square wrench.