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*351006*
351006
English
31
Malfunction
Possible cause
Action to be taken
The drilling speed is decreas-
ing.
The water flow rate is too high.
▶
Reduce the water flow rate
by adjusting the water flow
regulator.
The water flow rate is too low.
▶
Check the water supply to
the diamond core bit or,
respectively, increase the water
flow by adjusting the water flow
regulator.
Dust is hindering drilling progress.
▶
Use a suitable dust removal
system.
The diamond core bit can’t be
fitted into the chuck.
The core bit connection end or
chuck is dirty or damaged.
▶
Clean and grease the connec-
tion end and/or the chuck or
replace these parts.
Water escapes at the water
swivel or gear housing.
The water pressure is too high.
▶
Reduce the water pressure.
Water escapes from the
chuck during operation.
The diamond core bit isn’t securely
tightened in the chuck.
▶
Tighten the diamond core bit
securely.
▶
Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
The core bit connection end /
chuck is dirty.
▶
Clean and grease the connec-
tion end and/or the chuck.
The seal at the chuck or at the
connection end is defective.
▶
Check the seal and replace it if
necessary.
The drilling system has too
much play.
The diamond core bit isn’t securely
tightened in the chuck.
▶
Tighten the diamond core bit
securely.
▶
Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
The core bit connection end /
chuck is defective.
▶
Check the connection end and
chuck and replace them if
necessary.
10.2
The diamond core drilling machine is not in working order
Malfunction
Possible cause
Action to be taken
The service indicator shows
nothing.
The PRCD isn’t switched on.
▶
Check that the PRCD is
functioning and switch it on.
Interruption in the electric supply.
▶
Plug in another electric tool or
appliance and check whether it
works.
▶
Check the plug connections,
supply cord, power supply line
and main supply fuse.
Water in the motor.
▶
Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
The service indicator lights.
The carbon brushes are worn out.
▶
Replace the carbon brushes.
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