Dd 200: The Diamond Core Drilling Machine Is In Working Order - Hilti DD 250 Manual De Usuario

8.2 DD 200: The diamond core drilling machine is in working order

Malfunction
The service indicator blinks.
The service indicator lights.
The drilling performance indi-
cator does not light up.
The diamond core drilling
machine doesn't achieve full
performance.
The diamond core bit doesn't
rotate.
The drilling speed is decreas-
ing.
24
Possible cause
The motor has overheated. The
diamond core drilling machine is
running in cooling mode.
The carbon brush wear limit has
almost been reached. The diamond
core drilling machine will continue
to run for a few hours until it shuts
down automatically.
The carbon brushes have been
changed and must be run in.
Communication error between
the motor electronics and LED
indicator.
Supply network fault – undervolt-
age occurred.
The diamond core bit has become
jammed in the base material.
The gear selector isn't engaged.
Maximum drilling depth has been
reached.
The core is stuck in the diamond
core bit.
Wrong core bit specification for the
base material.
Action to be taken
▶ Wait a few minutes until the
motor has cooled down or
allow the diamond core drilling
machine to run under no load
in order to speed up the
cooling process. When normal
temperature is reached the
indication in the display goes
out and the diamond core
drilling machine activates the
restart interlock. Switch the
diamond core drilling machine
off and then on again.
▶ Have the carbon brushes
replaced at the next opportunity.
▶ Run in the carbon brushes by
letting the machine run under
no load for at least 1 minute
without interruption.
▶ 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.
▶ Check whether other power
consumers are disrupting the
supply from the network or
generator.
▶ Check the length of the exten-
sion cord used.
▶ 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.
▶ Operate the gear selector until
it engages.
▶ Remove the core and use a core
bit extension.
▶ Remove the core.
▶ Select a more suitable diamond
core bit specification.