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Page 13SKU 41983
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TROUBLESHOOTING
Problem Possible Causes Probable Solutions
Motor does not rotate
switch on power
supply.
Disrupted power supply.
Poor contact at the switch.
Armature or field coil burnt.
Breakage of the Stator coil.
Carbon Brushes worn out.
1.
2.
3.
4.
5.
Check power supply.
Repair switch.
Change coil.
Replace Stator Coil.
Replace Carbon Brushes.
1.
2.
3.
4.
5.
Abnormal noise from
motor; does not rotate
or rotates slowly.
Overload of motor caused by
excessive drilling depth or pressure.
Reduce drilling depth or pressure.
Decrease force.
Partial short circuit Partial short circuit or open circuit at
Armature.
Repair or change Armature.
Main voltage too low Main power voltage too low. Adjust main power voltage.
Gearbox becomes too
hot.
Overload, dull bit.
Damp coils.
Incorrect fitting.
Decrease in voltage.
1.
2.
3.
4.
Reduce load, sharpen bit.
Dry coils.
Repair or change armature.
Adjust voltage.
1.
2.
3.
4.
Sparking Short circuit or break at Armature.
Surface of Armature not smooth
and clean.
1.
2.
Repair Armature.
Inspect and clean Armature.
1.
2.
WARRANTY