46
English
2274306
*2274306*
Malfunction
Possible cause
Action to be taken
The drilling performance indi-
cator does not light up.
Communication error between
the motor electronics and LED
indicator.
▶
The diamond core drilling
machine is capable of working
even without LED indicator.
▶
Bring the diamond core drilling
machine to
Hilti
at your earliest
convenience.
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.
▶
Use an open-end wrench to
release the diamond core bit:
Disconnect the supply cord 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.
Stand-guided drilling
▶
Turn the handwheel and try to
release the diamond core bit
by moving the carriage up and
down.
The gear selector isn’t engaged.
▶
Move the gear selector until it is
engaged.
The drilling speed is decreas-
ing.
Maximum drilling depth has been
reached.
▶
Remove the core and use a core
bit extension.
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.
Wrong gear selected.
▶
Select the right gear.
Contact pressure is too low.
▶
Increase the contact pressure.
The machine has too little power.
▶
Select the next lower gear.
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.
The carriage lock is engaged.
▶
Release the carriage locking
mechanism.
Summary of Contents for DD 200
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