Use and Care Manual

8
7 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.
7.1 The rotary hammer is not in working order
Malfunction Possible cause Action to be taken
The LEDs on the battery indi-
cate nothing.
The battery is not fully inserted. ▶ Push the battery in until it
engages with a double click.
The battery is discharged. ▶ Change the battery and charge
the empty battery.
The battery is too hot or too cold. ▶ Allow the battery to cool
down or to warm up to room
temperature.
1 LED on the battery blinks. The battery is discharged. ▶ Change the battery and charge
the empty battery.
The battery is too hot or too cold. ▶ Allow the battery to cool
down or to warm up to room
temperature.
4 LEDs on the battery blink. The rotary hammer has been over-
loaded briefly.
▶ Release the control switch and
then press it again.
7.2 The rotary hammer is in working order
Trouble or fault Possible cause Action to be taken
No hammering action. The rotary hammer is too cold. ▶ Bring the tip of the drill bit
into contact with the working
surface, switch the rotary
hammer on and allow it to
run. If necessary, repeat the
procedure until the hammering
mechanism begins to operate.
The function selector switch is set
to “Drilling without hammering” .
▶ Set the function selector switch
to “Hammer drilling” .
The control switch can’t be
pressed, i.e. the switch is
locked.
The forward / reverse switch is in
the middle position.
▶ Push the forward / reverse
switch to the right or left.
The drive spindle does not
rotate.
The permissible operating temper-
ature of the rotary hammer’s elec-
tronics has been exceeded.
▶ Allow the tool to cool down.
The battery is discharged. ▶ Change the battery and charge
the empty battery.
The function selector switch is
not correctly engaged, is set to
“Chiseling” , or is set to “Chisel
positioning” .
▶ Set the function selector switch
to “Drilling without hammering”
or “Hammer drilling” .
The rotary hammer switches
itself off automatically.
The overload cut-out has been
activated.
▶ Release the control switch.
Allow the rotary hammer to cool
down. Press the control switch
again. Reduce the load on the
tool.
The battery runs down more
quickly than usual.
Very low ambient temperature. ▶ Allow the battery to warm up
slowly to room temperature.
The battery does not en-
gage with an audible "double
click".
The retaining lugs on the battery
are dirty.
▶ Clean the retaining lugs and refit
the battery.
Printed: 25.01.2016 | Doc-Nr: PUB / 5265030 / 000 / 00