14 English 2184702
*2184702*
▶ Prior to each use and before and after prolonged storage, check the
product and the batteries for damage.
9 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.
Trouble or fault Possible cause Action to be taken
The power tool does
not work.
The battery is not fully
inserted.
▶ Push the battery in
until it engages with
an audible double
click.
Battery is discharged. ▶ Change the battery
and charge the empty
battery.
The power tool
doesn’t work and all
four LEDs blink.
The power tool has been
overloaded briefly.
▶ Release the control
switch and then press
it again.
The overheating cut-out
has been activated.
▶ Allow the power tool
to cool down. Clean
the air vents.
The power tool does
not work and one
LED flashes.
Battery is discharged. ▶ Change the battery
and charge the empty
battery.
The battery is too hot or
too cold.
▶ Bring the battery to
the recommended op-
erating temperature.
The on/off button
cannot be pressed,
i.e. the button is
locked.
The forward/reverse
switch is in the middle
position.
▶ Push the
forward/reverse
switch to the left or
right.
No hammering ac-
tion.
The operating mode is
not set correctly at the
selector ring.
▶ Set the selector ring to
the “Hammer drilling”
position .
The battery runs
down more quickly
than usual.
Very low ambient tem-
perature.
▶ Allow the battery to
warm up slowly to
room temperature.
The battery does
not engage with an
audible double click.
The retaining lugs on the
battery are dirty.
▶ Clean the retaining
lugs and push the
battery in until it
engages. Contact
Hilti Service if the
problem persists.
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