09
TROUBLESHOOTING
TROUBLE
CAUSES
CORRECTION
Motor does not run when power
switch is turned “ON”.
1. Switch is burned out.
2. Connection wire is loose or
damaged.
1. Replace the switch.
2. Tighten or replace the wire.
Motor does not run at full speed. 1. Power voltage is too low.
2. Motor is damaged.
1. Test voltage.
2. Check and repair motor.
Motor does not reach full power. 1. Incorrect power wiring.
2. Overload.
1. Replace with the correct size
power wiring.
2. Reduce sanding load.
Motor overheating
1. Motor is dirty.
2. Motor is damaged.
1. Clean motor.
2. Check and repair motor.
Excessive machine vibration
Machine is incorrectly leveled. Adjust machine leveling
Mark on workpiece
1. Sanding drum is damaged.
2. Sanding cloth on drum is worn
in some areas.
1. Replace the sanding drum.
2. Replace sanding cloth
Sanding rum turns in wrong
direction
Wrong phase or voltage
Make sure the phase and
voltage comply with machine
requirement.
Burns on workpiece
Wrong abrasive grit on sanding
cloth
Use coarser grit to remove more
material from workpiece.