Care And Maintenance; Troubleshooting - Hilti DEG 125-D Mode D'emploi

7.4.2 Switching off after locking the switch
Press the front part of the on / off switch down (the lock
then releases).

8 Care and maintenance

CAUTION
Disconnect the mains plug from the power outlet.
8.1 Care of the power tool
DANGER
Under extreme conditions, when used for working on
metal, conductive dust may accumulate inside the tool.
This may have an adverse effect on the tool's protective
insulation. Under such conditions, the tool should be
plugged into a ground fault circuit interrupter (RCD)
and use of a stationary dust removal system and
frequent cleaning of the tool's cooling air slots is
recommended.
The outer casing of the power tool is made from impact-
resistant plastic. Sections of the grip are made from a
synthetic rubber material.
Never operate the power tool when the air vents are
blocked. Regularly clean the power tool's air vents care-
fully with a dry brush. Do not permit foreign objects to
enter the interior of the tool. The motor's fan will draw
dust into the casing and an excessive accumulation of
conductive dust (e.g. metal, carbon fiber) may cause
electrical hazards. Clean the outside of the power tool at
regular intervals with a slightly damp cloth. Do not use
a spray, steam pressure cleaning equipment or running
water for cleaning. This may negatively affect the elec-
trical safety of the tool. Always keep the grip surfaces

9 Troubleshooting

Fault
The power tool doesn't start.
The power tool doesn't achieve
full power.
7.5 Restart interlock
NOTE
If the power tool is unplugged from the electric supply
while the on / off switch is locked in the on-position and
subsequently plugged back into the electric supply, it
will not restart. The switch lock must be released while
the power tool is disconnected from the electric supply
before the supply cord is again plugged into the power
outlet.
of the tool free from oil and grease. Do not use cleaning
agents which contain silicone.
NOTE
Frequent work on conductive materials (e.g. metal, car-
bon fiber) may make shorter maintenance intervals ne-
cessary. Take your individual work place risk assessment
into account.
8.2 Maintenance
WARNING
Do not operate the tool if parts are damaged or
when the controls do not function faultlessly. Have
the power tool repaired by Hilti Service.
WARNING
Repairs to the electrical section of the power tool may
be carried out only by trained electrical specialists.
Check all external parts of the power tool for damage
at regular intervals and check that all controls operate
faultlessly.
8.3 Checking the power tool after care and
After carrying out care and maintenance work on the
power tool, check that all protective and safety devices
are fitted and that they function faultlessly.
Possible cause
Interruption in the electric supply.
Supply cord or plug defective.
The extension cord's conductor cross
section is inadequate.
maintenance
Remedy
Plug in another electric appliance and
check whether it works.
Have the supply cord and plug
checked by an electrical specialist
and replaced if necessary.
Use an extension cord with an ad-
equate conductor cross section.
en
31