Ensure that the suction power is not set too low. Press the + button to set a higher suction power.

The acoustic warning signal could also have been triggered by a kinked or clogged suction hose. Check the suction hose.

Open the extractor via the T-LOC lock and unlock the dust container. Then completely remove the dust container. The main filter is located on the side of the container.

Remove the main filter and vacuum it using a different mobile dust extractor. Also check the main filter for damage and cracks in the filter material or sealing foam.

To avoid damaging the suction turbine, replace the main filter if damaged.

Change the filter bag if full. If the filter bag is only partially filled, rock it a little in order to release stuck dust from the inner wall of the filter bag.