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This may have an adverse effect on the tool's protective
insulation. In this case, use of a stationary dust extrac-
tion system and frequent cleaning of the ventilation
slots are 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.
en
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
of the tool free from oil and grease. Do not use cleaning
agents which contain silicone.
9 Troubleshooting
Fault
The battery runs down more
quickly than usual.
The battery doesn't engage with
an audible click.
LED 1 blinks.
The power tool doesn't run and
1 LED blinks.
The tool doesn't work and all 4
LEDs blink.
The power tool or the battery
becomes very warm.
The power tool doesn't achieve
full power.
30
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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
Battery condition is not optimal.
The retaining lugs on the battery are
dirty.
The battery is discharged.
The tool is overloaded (application
limits exceeded).
The battery is discharged.
The battery is too hot or too cold.
The power tool has been overloaded
briefly.
The overheating prevention cut-out
has been activated.
Electrical fault.
The power tool has been overloaded
(application limits exceeded).
A battery with inadequate capacity
was used.
maintenance
Remedy
Have battery condition diagnosed by
Hilti Service or replace with a new
battery.
Clean the retaining lugs and push the
battery in until it engages. Contact
Hilti Service if the problem persists.
Charge the battery.
Use the right power tool for the job
(don't use a low-powered tool for
heavy work).
Change the battery and charge the
empty battery.
Bring the battery to the recommen-
ded working temperature.
Release the switch and press it again.
Allow the power tool to cool down.
Switch the power tool off immedi-
ately, remove the battery from the
tool and allow it to cool down while
keeping an eye on it, contact Hilti
Service.
Use the right power tool for the job
(don't use a low-powered tool for
heavy work).
Use a battery with a capacity of at
least 2.6 Ah.
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