The Diamond Core Drilling Machine Is Not In Working Order - Hilti DD 30-W Manual

Malfunction
The drilling speed is decreas-
ing.
The diamond core bit can't be
fitted into the chuck.
The diamond core bit has too
much play.
No water is flowing.
Water escapes from the
chuck during operation.

8.2 The diamond core drilling machine is not in working order

Malfunction
The service indicator shows
nothing.
28 English
Printed: 06.07.2017 | Doc-Nr: PUB / 5283534 / 000 / 05
Possible cause
Maximum drilling depth has been
reached.
The core is stuck in the diamond
core bit.
Wrong core bit specification for the
base material.
High steel content (indicated by
clear water containing metal cut-
tings).
The diamond core bit is defective.
The diamond core bit is polished.
The water flow rate is too high.
The water flow rate is too low.
The connection end is dirty or not
secured in the chuck correctly.
The core bit connection end or
chuck is dirty or damaged.
The chuck operating lever isn't fully
open.
The connection end is defective.
The chuck lever is not closed.
The filter or water flow indicator is
blocked.
The core bit connection end /
chuck is dirty.
The chuck seal is defective.
Possible cause
The PRCD isn't switched on.
Interruption in the electric supply.
Water in the motor.
Action to be taken
▶ Remove the core and use a
longer core bit.
▶ Remove the core.
▶ Select a more suitable diamond
core bit specification.
▶ Select a more suitable diamond
core bit specification.
▶ Check the diamond core bit
for damage and replace it if
necessary.
▶ Sharpen the diamond core bit
by drilling into a sharpening
plate.
▶ Reduce the water flow rate
by adjusting the water flow
regulator.
▶ Check the water supply to
the diamond core bit or,
respectively, increase the water
flow by adjusting the water flow
regulator.
▶ Check the filter element at the
water connection.
▶ Clean the connection end and fit
the diamond core bit correctly.
▶ Clean the connection end
and/or the chuck or replace
these parts.
▶ Open the lever as far as it will
go.
▶ Check the connection end and
replace it if necessary.
▶ Close the chuck lever.
▶ Remove the filter or water flow
indicator and flush it through.
▶ Clean the connection end or the
chuck.
▶ Check the seal and replace it if
necessary.
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.