20 English 2048398
*2048398*
Malfunction Possible cause Action to be taken
The diamond core drilling
machine doesn’t achieve full
performance.
Supply network fault – undervolt-
age occurred.
▶ Check whether other power
consumers are disrupting the
power supply from the network
or generator.
▶ Check the length of the exten-
sion cord used.
The diamond core bit doesn’t
rotate.
The diamond core bit has become
jammed in the base material.
▶ Guide the diamond core drilling
machine in a straight line.
▶ Use an open-end wrench to
release the diamond core bit:
Disconnect the mains plug from
the power outlet. Grip the
diamond core bit with a suitable
open-end wrench close to the
connection end and release the
diamond core bit by rotating it.
The drilling speed is decreas-
ing.
Maximum drilling depth has been
reached.
▶ Remove the core and use a
longer core bit.
The core is stuck in the diamond
core bit.
▶ Remove the core.
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.
Printed: 05.07.2019 | Doc-Nr: PUB / 5283523 / 000 / 06
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