Troubleshooting - Hilti DD 160 Manual

Storage
▶ Always store this product with the electric supply cable unplugged from the electricity supply.
▶ Store this product in a dry place, where it cannot be accessed by children or unauthorized persons.
▶ After a long period of storage, always check all visible parts and controls for signs of damage and make
sure that they all function correctly.
8

Troubleshooting

If the trouble you are experiencing is not listed in this table or you are unable to remedy the problem by
yourself, please contact Hilti Service.
8.1 Troubleshooting table
Trouble or fault
Diamond core drilling ma-
chine does not start
Service indicator shows
Diamond core drilling ma-
chine does not start and ser-
vice indicator lights up
Diamond core drilling ma-
chine does not start and ser-
vice indicator flashes
Diamond core drilling ma-
chine does not start and theft
protection indicator flashes
The diamond core bit doesn't
rotate.
36 English
Printed: 09.08.2019 | Doc-Nr: PUB / 5069586 / 000 / 08
Possible cause
Interruption in the electric supply.
The on / off switch is defective.
Interruption in the electric supply
Fault in the electronics.
Water in the motor.
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 are worn out.
The motor has overheated.
Overload error.
The diamond core drilling machine
has not been unlocked (machines
with optional theft protection sys-
tem).
The gear selector isn't engaged.
Action to be taken
▶ 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.
▶ Have the machine repaired by
Hilti Service.
▶ Check the supply cord, exten-
sion cord, supply cord plug and
PRCD and have them replaced
as necessary by a trained elec-
trical specialist.
▶ Have the machine repaired by
Hilti Service.
▶ Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
▶ Have the carbon brushes
replaced at the next opportunity.
▶ Replace the carbon brushes.
▶ 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. Switch the diamond
core drilling machine off and
then on again.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Use the TPS key to unlock the
diamond core drilling machine.
▶ Operate the gear selector until
it engages.
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