In case of malfunctions
In case of malfunctions switch the tool off and pull the mains plug.
Repairs on the electric parts of the tool may only be performed by
an electrical specialist.
Troubleshooting
Malfunction
Possible cause
Repair
Tool does not
operate
- Line voltage
interrupted
- Power cable or plug
defective
- Switch defective
- Plug in other electric tool,
check function
- Have them checked by
specialist, replace if needed.
- Have it checked by
specialist,replace if needed
Motor runs- drill
bit does not turn
- Transmission
defective
- Have the tool repaired by an
authorized service point
Drilling speed
decreases
- Water pressure/water
throughput too high
- Drill bit defective
- Transmission
defective
- Drill bit polishes
- Regulate water throughput
- Check drill bit for damages,
exchange if needed
- Have the tool repaired by an
authorized service point
- Sharpen drill bit on oilstone
with water flushing running
Motor switches
off
- Engine stops
- Tool overheated
Overload protection
activated
- Hold tool in a straight
position
- Disengage tool and put it
backto operations by
activiting theswitch
Water leaks from
transmission
housing
- Gland rings defective - Have the tool repaired by an
authorized service point