# Errors – Causes and Corrective Measures

Cause | Corrective measure
--- | ---
The drywall sander does not run smoothly or jolts across the surface.
The suction effect is too strong. | Reduce the suction power or switch to external dust extraction, if necessary.
The bodyfiller material and/or substrates are hard. | Reduce the suction power or switch to external dust extraction, if necessary.
Reduce the speed.
The removal rate of the material to be machined is too high.
The drywall sander's speed is too high. | Reduce the speed.
The suction effect on the drywall sander is too strong. | Reduce the suction effect or switch to external dust extraction.
The bodyfiller material has a high proportion of filler or is very soft. | Switch on the external dust extraction, set the suction power thumbwheel to setting 6 and, in extreme cases, reduce the speed.
The grit of the abrasive is too coarse. | Use a sanding sheet with a finer grit.
The surface quality is not optimal.
The grit of the abrasive is too coarse. | Use a sanding sheet with a finer grit.
The drying times for the bodyfiller material have not been observed. | Refer to the technical information sheets and manufacturer's recommendations.
The suction effect is too strong. | Reduce the suction power.
The bodyfiller material has a high proportion of filler or is very soft. | Use a sanding sheet with a finer grit.
The running power tool has been positioned on the surface (scoring). | Position the power tool before switching it on.
Work on the surface and always work with the removable brush segment.
There are sanding marks on the surface.
The hard sanding pad has been positioned at an angle on the surface. | Use a soft sanding pad with an intermediate pad.
In the case of very soft bodyfiller material, the sanding pad is too hard or the grit of the abrasive is too coarse. | Use a soft sanding pad with an intermediate pad.
Choose a finer abrasive grit.
The suction effect is insufficient.
The suction power on the dust extractor is too low. | Increase the suction power on the dust extractor.
The drywall sander's speed is too high. | Reduce the speed.
The internal dust extraction on the drywall sander is too low. | Reduce the suction power or switch to external dust extraction.
The bodyfiller material has a high proportion of filler or is very soft. | Switch on the external dust extraction, set the suction power thumbwheel to setting 6 and, in extreme cases, reduce the speed.
The main filter on the dust extractor is blocked/jammed. | Clean the filter element regularly: Option 1: Set the suction power regulation to the maximum suction power. Seal the nozzle, extraction hose or intake port on the dust extractor with the palm of your hand for 10 seconds until the automatic cleaning starts. Option 2: Clean the filter element mechanically (extraction). Option 3: Check the filter element for damage and blockages. Insert a new filter element regularly.
A fleece dust bag is being used. | Use a waste disposal dust bag.
The extraction hose is blocked or twisted. | Remove the blockage or untwist the hose.
The dust extractor's dust container is full. | Empty the dust extractor's dust container.