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22 | English
uAvoid dust accumulation at the workplace. Dust can
easily ignite.
Operation
Start-up
uEnsure that the cover (13) of the Bluetooth® Low Energy
Module GCY42 is closed during operation. This will pre-
vent dust from getting in.
Setting the Operating Mode (seefigureH)
You can use the combi switch(7) to select the operating
mode of the power tool.
Note: Only change the operating mode when the power tool
is switched off. Otherwise, the power tool may become dam-
aged.
Note: If you switch to a different operating mode while the
on/off switch is locked, the power tool will switch off.
To change the operating mode, turn the combi switch(7)
to the required position until you hear it click into place.
Position for hammer drilling into concrete or
stone
GBH18V-34CF with keyless quick-change
chuck(1): Position for drilling without impact
in wood, metal, ceramic and plastic (clock-
wise)
Anti-clockwise position for loosening the ap-
plication tool from the workpiece
Vario-Lock position for changing the chiselling
position.
Position for chiselling
Switching On/Off
If necessary, release the lock-on button(9) for the on/off
switch.
To switch on the power tool, press the on/off
switch(11).
The lamp lights up when the on/off switch(11) is lightly or
fully pressed, meaning that the work area is illuminated in
poor lighting conditions.
To switch off the power tool, release the on/off switch
(11).
Adjusting the Speed/Impact Rate
You can adjust the speed/impact rate of the power tool when
it is on by pressing in the on/off switch(11) to varying ex-
tents.
Applying light pressure to the on/off switch(11) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
You can also control the speed on the user interface and/or
via a smartphone app: .
Changing the chiselling position (Vario-Lock)
You can lock the chisel in 16 different positions, so you can
select the optimum working position for each task.
Insert the chisel into the tool holder.
Turn the combi switch(7) to the "drilling" position.
Turn the application tool to the required chisel position.
Turn the combi switch(7) to the "chiselling" position.
With this, the tool holder is locked.
Chiselling with lock function
To chisel for extended periods without pressing the on/off
switch(11), lock the on/off switch in "chiselling" operating
mode.
To lock the power tool, press the on/off switch(11)
down fully whilst simultaneously pressing the lock-on
switch(9).
To switch the lock off, press the lock-on button(9) again.
User interface (seefigureI)
The user interface(19) is used to select the working mode
and to indicate the status of the power tool.
Status indications
Battery charge indicator
(user interface)(23) Meaning/cause Solution
Green (2 to 5 bars) Battery charged
Yellow (1 bar) Battery almost empty Replace or charge battery soon
Red (1 bar) Battery empty Replace or charge battery
Temperature indicator(29) Meaning/cause Solution
Yellow Operating temperature of the battery or the
power tool has significantly increased, per-
formance is reduced
Leave the power tool to cool down or replace
overheated battery
1 609 92A 7SJ | (23.06.2022) Bosch Power Tools
22


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