en
21
9 Troubleshooting
Fault
Possible cause
Remedy
The power tool does-
n’t run.
The battery is
discharged or fitted
incorrectly.
The battery must be
heard to engage with
a double click or, re-
spectively, needs to be
charged.
Electrical fault.
Remove the battery from
the power tool and con-
tact Hilti Service.
The power tool does-
n’t run and all 4 LEDs
blink.
The power tool has been
overloaded.
Release the control
switch and press it
again.
The overheating preven-
tion cut-out has been
activated.
Allow the power tool to
cool down.
Clean the ventilation
slots.
The power tool does-
n’t run and 1 LED
blinks.
The battery is
discharged.
Change the battery and
recharge the discharged
battery.
The battery is too hot or
too cold.
Bring the battery to the
recommended working
temperature.
No hammering ac-
tion.
The torque and operat-
ing mode setting ring are
not set to the hammer
drilling symbol.
Turn the torque and op-
erating mode setting ring
to the hammer drilling
symbol.
The on / off switch
can’t be pressed, i.e.
the switch is locked.
The forward / reverse
switch is in the middle
position (transport lock
engaged).
Push the forward / re-
verse switch to the left or
right.
The battery runs
down more quickly
than usual.
Battery condition is not
optimal.
Have battery condition
diagnosed by Hilti Ser-
vice or replace with a
new battery.
The battery doesn’t
engage with an audi-
ble double click.
The retaining lugs on the
battery are dirty.
Clean the retaining lugs
and check that the bat-
tery engages securely.
Contact Hilti Service if
the problem persists.
Printed: 30.09.2013 | Doc-Nr: PUB / 5071630 / 000 / 02