# Rectifying faults

- If a fault (e.g. a filter damage) occurs, the dust extractor must be switched off immediately. The fault must be repaired before resuming operation.

Problem | Cause | Corrective measures
--- | --- | ---
Suction turbine will not switch on. | No power supply | Check the mains cable, mains plug, fuse and socket.
Mode selector switch (4) is set to 1+. | Set the mode selector switch (4) to 1 or switch on the power tool plugged into the plug socket (6).
The suction turbine will not switch on again after the container has been emptied. | Reset required | Switch the dust extractor off and wait 5 seconds before switching it back on.
The suction power is decreasing. | Container (3) or fleece filter bag (20) full | Empty the container or fleece filter bag.
Nozzle, suction tube (29) or vacuum hose (23) blocked | Remove blockages
Filter (38) is soiled or defective | Carry out semi-automatic filter cleaning, clean or replace the filter
Filter (38) has not engaged in the filter holder (35) | Make sure that the filter has correctly engaged
Top part of the dust extractor (12) is not seated correctly | Place the top part of the dust extractor on correctly and close the catches (13)
Dust escapes during dry extraction | Filter (38) incorrectly inserted | Check that the filter has been fitted correctly
Filter (38) defective | Replace filter
Water escapes during wet extraction | Float (37) is blocked | Wipe down the float cage with a damp cloth and clean the float by lightly shaking the dust extractor If the float and float cage become heavily contaminated, contact an authorised Bosch after-sales service centre.
The semi-automatic filter cleaning function is not working. |  | Block the air inlet and press the semi-automatic filter cleaning button (11) at least five times in succession If the filter cleaning function still does not work afterwards, contact an authorised Bosch after-sales service centre.