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If your tool seems not to operate properly, follow the instructions below. If this does
not solve the problem, please contact your repair agent.
• Core bit does not cut well
If the material is too hard for the core bit, select a more suitable core bit with
harder segments.
If the water flow is too high the diamond segments are not sufficiently abraded and
do not self sharpen. Decrease the water flow.
• Segments are damaged or look glazed and polished
Jerking the machine during drilling or pushing too hard will be damage the
segments. Conversely, too gentle a feed will cause the diamond segments to
become glazed. Keep the bit steadily working.
To sharpen and true up the diamond segments simply drill into an appropriate
dressing stone as many times as necessary to restore cutting performance.
• Motor does not run
1. Check that the RCD (19) has been reset.
2. Check that the carbon brushes are making proper contact and are not over worn.
Refer Carbon Brushes in the maintenance section on page 15.
• Core cutters does not drill through the concrete
1. Safety clutch may need to be serviced. The unit needs to be serviced by a
Qualified Power Tool Repairer.
• Core drill vibrates
1. Core bit is worn or damaged. Replace core bit.
2. Core bit has touched reinforcing bar in concrete. Reduce drilling speed.
• Drill progress is slow
1. Core bit is worn or damaged. Replace core bit.
• Water flow is intermittent
1. Grit or chips partially blocking the water flow. Stop the drill, remove from power
supply and clear the blockage.
• Expelled water flow is very clear
1. The water flow is too fast which can prevent the segments from re-sharpening.
Reduce the water flow.
• Segments and core are burnt
1. Increase the water flow.
• Segments wear too fast
1. Choose a more appropriate core bit (with harder segments).
TROUBLESHOOTING
