Hilti DD 110-D Manual De Instrucciones Original página 34

Malfunction
The drilling speed is decreas-
ing.
The diamond core bit can't be
fitted into the chuck.
The drilling system has too
much play.
10.2 The diamond core drilling machine is not in working order
Malfunction
The service indicator shows
nothing.
The service indicator lights.
The service indicator blinks.
The theft protection indicator
blinks.
11 Disposal
Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The
materials must be correctly separated before they can be recycled. In many countries, your old tools,
28 English
Possible cause
The diamond core bit is defective.
Wrong gear selected.
Contact pressure is too low.
The machine has too little power.
The diamond core bit is polished.
Dust is hindering drilling progress.
The core bit connection end or
chuck is dirty or damaged.
The diamond core bit isn't securely
tightened in the chuck.
The core bit connection end /
chuck is defective.
Possible cause
The PRCD isn't switched on.
Interruption in the electric supply.
The carbon brushes are worn out.
Motor speed error.
The diamond core drilling machine
has not been unlocked (machines
with optional theft protection sys-
tem).
Action to be taken
▶ Check the diamond core bit
for damage and replace it if
necessary.
▶ Select the right gear.
▶ Increase the contact pressure.
▶ Select the next lower gear.
▶ Sharpen the diamond core bit
by drilling into a sharpening
plate.
▶ Use a suitable dust removal
system.
▶ Clean and grease the connec-
tion end and/or the chuck or
replace these parts.
▶ Tighten the diamond core bit
securely.
▶ Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
▶ Check the connection end and
chuck and replace them 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.
▶ Replace the carbon brushes.
→ page 26
▶ Disconnect the diamond core
drilling machine from the power
supply and then switch it back
on again.
▶ Use the TPS key to unlock the
diamond core drilling machine.
274860
*274860*