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Malfunction
Water escapes from the
chuck during operation.
No water is flowing.
The drilling system has too
much play.
9.2
The diamond core drilling machine is not in working order
Malfunction
The multifunction display is
not showing anything.
Service required.
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Disposal
Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The
materials must be correctly separated before they can be recycled. In many countries, your old tools,
*2279864*
Possible cause
The core bit connection end /
chuck is dirty.
The seal at the chuck or at the
connection end is defective.
The water channel is blocked.
The diamond core bit isn't securely
tightened in the chuck.
The core bit connection end /
chuck is defective.
The carriage has too much play.
Screws / bolts on the drill stand are
loose.
The drill stand is inadequately fas-
tened.
The connection between the dia-
mond core drilling machine and the
carriage or spacers is loose.
Possible cause
The PRCD isn't switched on.
Interruption in the electric supply.
Water in the motor.
The carbon brushes are worn out.
Water in the motor.
2279864
Action to be taken
▶ Clean and grease the connec-
tion end and/or the chuck.
▶ Check the seal and replace it if
necessary.
▶ Increase the water pressure or
flush the water channel clear
from the opposite direction.
▶ Clean the water inlet and outlet
apertures.
▶ 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.
▶ Check the connection end and
chuck and replace them if
necessary.
▶ Adjust the play between the rail
and carriage.
▶ Check the security of screws
/ bolts on the drill stand and
tighten them if necessary.
▶ Fasten the drill stand more
securely.
▶ Check the connection and,
if necessary, refasten the
diamond core drilling machine.
Action to be taken
▶ Check that the PRCD is
functioning and switch it on.
▶ 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.
▶ Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Replace the carbon brushes.
→ page 21
▶ Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
▶ Switch the diamond core drilling
machine off and then on again.
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