44 English 2048397
*2048397*
Malfunction Possible cause Action to be taken
The drilling speed is decreas-
ing.
Wrong core bit specification for the
base material.
▶ Select a more suitable diamond
core bit specification.
High steel content (indicated by
clear water containing metal cut-
tings).
▶ Select a more suitable diamond
core bit specification.
The diamond core bit is defective. ▶ Check the diamond core bit
for damage and replace it if
necessary.
The diamond core bit is polished. ▶ Sharpen the diamond core bit
by drilling into a sharpening
plate.
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.
▶ Check the filter element at the
water connection.
The connection end is dirty or not
secured in the chuck correctly.
▶ Clean the connection end and fit
the diamond core bit correctly.
The diamond core bit can’t be
fitted into the chuck.
The core bit connection end or
chuck is dirty or damaged.
▶ Clean the connection end
and/or the chuck or replace
these parts.
The chuck operating lever isn’t fully
open.
▶ Open the lever as far as it will
go.
The diamond core bit has too
much play.
The connection end is defective. ▶ Check the connection end and
replace it if necessary.
The chuck lever is not closed. ▶ Close the chuck lever.
No water is flowing. The filter or water flow indicator is
blocked.
▶ Remove the filter or water flow
indicator and flush it through.
Water escapes from the
chuck during operation.
The core bit connection end /
chuck is dirty.
▶ Clean the connection end or the
chuck.
The chuck seal is defective. ▶ Check the seal and replace it if
necessary.
8.2 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.
Printed: 05.02.2019 | Doc-Nr: PUB / 5283477 / 000 / 05
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