▶ Do not store batteries on the charger. Always remove the battery from
the charger when the charging operation has completed.
▶ Never leave batteries in direct sunlight, on sources of heat, or behind
glass.
▶ Store the product and batteries where they cannot be accessed by
children or unauthorized persons.
▶ Prior to each use and before and after prolonged storage, check the
product and the batteries for damage.
9
Troubleshooting
If a problem occurs, always observe the status indicator of the battery. See
the section headed Status indicators of the Liion battery.
If the trouble you are experiencing is not listed in this table or you are unable
to rectify the problem by yourself, contact Hilti Service.
Trouble or fault
Product does not
work.
Running speed sud-
denly drops consid-
erably.
The battery runs
down more quickly
than usual.
The battery does
not engage with an
audible click.
Product or battery
gets very hot.
LEDs of the battery
show nothing
Product switches off
automatically after 5
minutes.
16
English
Possible cause
The battery is not fully
inserted.
Battery is discharged.
Very low ambient tem-
perature.
The retaining lugs on the
battery are dirty.
Electrical fault.
Battery defective.
Safety function
Action to be taken
▶ Push the battery in
until it engages with
an audible click.
▶ Change the battery
and charge the empty
battery.
▶ Allow the battery to
warm up slowly to
room temperature.
▶ Clean the retaining
lugs and engage the
battery in the working
position.
▶ Switch the product off
immediately, remove
the battery, keep it
under observation,
allow it to cool down
and contact Hilti
Service.
▶ Contact Hilti Service.
▶ Press the control
switch again.
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