10
GB
Problem
Possible cause
Solution
No function when On/Off Trigger Switch (5) is operated
No power
Check power supply
Defective On/Off Trigger Switch
Have the On/Off Trigger Switch replaced by an authorised GMC
service centre
Slow material removal
Sanding drum too fine or worn
Fit new sanding drum with coarser grit
Scratches on workpiece after sanding
Sanding drum too coarse
Fit new sanding drum with finer grit
Not enough material removed
Continue sanding
Burn marks on workpiece
Sanding drum incompatible with material
Fit correct sanding drum
Too much pressure exerted on to the sander
Use less pressure whilst using the tool. This will also help reduce wear
on tool and sanding drums
Excessive workplace dust or swarf
Vacuum dust extraction system not used in workplace
Fit a dust extraction system
Cleaning frequency inadequate
Clean workplace and tool more frequently
Tool hot to the touch
Work session too long
Allow tool to cool before continuing
Motor Vents (6) blocked
Vacuum out Motor Vents and allow tool to cool before continuing
Work surface excessively hot
Allow to cool before continuing
Troubleshooting
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