18 English
Trouble or fault Possible cause Action to be taken
The power tool does
not work.
Low battery. ▶ 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.
Low battery. ▶ 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
selector switch is in the
middle position.
▶ Push the
forward/reverse
switch to the left or
right.
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.
The tool or battery
gets very hot.
The tool is overloaded
(application limits ex-
ceeded).
▶ Pay attention to the
power and perfor-
mance rating of the
product before using
it, i.e check its suitabil-
ity for the job on hand.
See the “Technical
data” section.
No hammering ac-
tion.
The operating mode is
not set correctly at the
selector ring.
▶ Set the selector ring to
the “Hammer drilling”
position .
Printed: 02.05.2019 | Doc-Nr: PUB / 5152170 / 000 / 03
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