Connectivity Functions; Practical Advice - Bosch GBH 18V-28 DC Professional Manual Original

22 | English
Note: If the rotational direction switch is in the middle posi-
tion, the on/off switch is blocked.
Switching On and Off
– To switch on the power tool, press the on/off switch (7).
The worklight (9) lights up when the on/off switch (7) is
lightly or fully pressed, allowing the work area to be illumin-
ated in poor lighting conditions.
When switching on the power tool for the first time, the start
may be slightly delayed as the power tool's electronic system
has to configure itself first.
For low temperatures, the power tool reaches the full ham-
mer/impact capacity only after a certain time.
– To switch off the power tool, release the on/off switch
(7).
Adjusting the Speed/Impact Rate
– Adjust the speed/impact rate of the power tool when it is
on by pressing in the on/off switch (7) to varying extents.
Applying light pressure to the on/off switch (7) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
Overload clutch
If the application tool jams or snags, the power trans-
u
mission to the drill spindle will be interrupted. Always
hold the power tool firmly with both hands to with-
stand the forces this may create and adopt a position
with stable footing.
Switch the power tool off immediately and remove the
u
application tool if the power tool becomes blocked.
Switching on when the drilling tool is blocked may
cause high torque reactions.
Rapid shut-off (KickBack Control)
The rapid shut-off function (KickBack
Control) gives the user greater control
over the power tool and offers them bet-
ter protection than power tools that do
not have KickBack Control. The power
tool will switch off if it suddenly and un-
foreseeably rotates around the drilling
axis.
– To switch the tool back on, release the on/off switch (7)
and then press it again twice.
Rapid shut-off is indicated by flashing of the worklight (9) on
the power tool.
Vibration damping
The integrated vibration damping function re-
duces the generated vibrations by means of a
built-in counter oscillator.

Connectivity functions

In conjunction with the Bluetooth® Low Energy Module
GCY 42, the following connectivity functions are available
for the power tool:
– Registration and personalisation
– Status check, output of warning messages
1 609 92A 5SL | (26.11.2021)
– General information and settings
– Management
Read the corresponding operating instructions for informa-
tion about the Bluetooth® Low Energy Module GCY 42.
Deactivating the connectivity function
With the Bluetooth® Low Energy Module, the power
u
tool is equipped with a radio interface. Local operat-
ing restrictions, e.g. in aircraft or hospitals, must be
observed.
Note: The cover (10) can only be securely closed if the
Bluetooth® Low Energy Module and the button cell are situ-
ated in the power tool.
– To deactivate the Bluetooth® Low Energy Module, rotate
the button cell or place means of insulation between the
button cell and Bluetooth® Low Energy Module.
– Close the cover (10) to prevent dirt from getting in.

Practical Advice

With the Bluetooth® Low Energy Module GCY 42, the
u
power tool is equipped with a radio interface. Local
operating restrictions, e.g. in aircraft or hospitals,
must be observed.
In areas where the Bluetooth® wireless technology is
u
not allowed to be used, the Bluetooth® Low Energy
Module GCY 42 and the button cell must be removed.
Note: The cover (10) can only be securely closed if the
Bluetooth® Low Energy Module GCY 42 and the button cell
are situated in the power tool.
– To deactivate the Bluetooth® Low Energy Module
GCY 42, rotate the button cell or place means of insula-
tion between the button cell and Bluetooth® Low Energy
Module GCY 42.
– Close the cover (10) to prevent dirt from getting in.
Setting the drilling depth (see figure H)
You can use the depth stop (14) to set the required drilling
depth X.
– Press the button for depth stop adjustment (13) and in-
sert the depth stop into the auxiliary handle (15).
The fluting on the depth stop (14) must face downwards.
– Insert the SDS-plus application tool into the SDS-plus tool
holder (2) to the stop. Otherwise, the movability of the
SDS-plus drilling tool can lead to incorrect adjustment of
the drilling depth.
– Pull the depth stop far enough out that the distance
between the drill bit tip and the edge of the depth stop
corresponds to the required drilling depth X.
Changing the chiselling position (Vario-Lock)
You can lock the chisel in 44 different positions, so you can
select the optimum working position for each task.
– Insert the chisel into the tool holder.
– Turn the impact/mode selector switch (12) to the "Vario-
Lock" position.
– Turn the application tool to the required chisel position.
Bosch Power Tools