Maintenance - Berner BHD 5-1 Bedienungsanleitung/Sicherheitshinweise

E N G L I S H
Proper hand position requires one hand on the side
handle (c), with the other hand on the main handle (d).
Switching On and Off (fi g. 1)
To turn the tool on, depress the trigger switch (a).
To stop the tool, release the trigger switch.
The lock-on slider (b) allows the trigger switch (a) to be
locked on in chiselling mode only. If the lock-on button
is activated in drilling mode, as a feature the tool will
switch off automatically.
To turn the tool on, press the trigger switch (a).
To stop the tool, release the switch.
For continuous operation, press and hold down the
switch (a), slide the lock-on button (b) upwards and
release the switch.
To stop the tool in continuous operation, press the
switch briefl y and release it. Always switch off the tool
when work is fi nished and before unplugging.
Hammerdrilling
To turn the tool on, press the on/off switch (a).
To stop the tool, release the switch.
Drilling with a Solid bit (fi g. 1)
1. Insert the appropriate drill bit.
2. Set the mode selector switch (f) to the
hammerdrilling position.
3. Set the electronic speed and impact control dial
(g).
4. Fit and adjust the side handle (c).
5. Mark the spot where the hole is to be drilled.
6. Place the drill bit on the spot and switch on the
tool.
7. Always switch off the tool when work is fi nished
and before unplugging.
Drilling with a Core Bit (fi g. 1)
1. Insert the appropriate core bit.
2. Assemble the centerdrill into the core bit.
3. Set the mode selector switch (f) to the
hammerdrilling position.
4. Turn the electronic speed and impact control dial
(g) to a medium or high speed setting.
5. Fit and adjust the side handle (c).
6. Place the centerdrill on the spot and switch on the
tool. Drill until the core penetrates into the concrete
approx. 1 cm.
7. Stop the tool and remove the centerdrill. Place the
core bit back into the hole and continue drilling.
8. When drilling through a structure thicker than
the depth of the core bit, break away the round
cylinder of concrete or core inside the bit at regular
intervals.
To avoid unwanted breaking away of concrete
around the hole, fi rst drill a hole the diameter of the
centerdrill completely through the structure. Then
drill the cored hole halfway from each side.
9. Always turn the tool off when work is fi nished and
before unplugging.
Chipping and Chiselling (fi g. 1)
1. Insert the appropriate chisel and rotate it by hand
to lock it into one of 18 positions.
2. Set the mode selector switch (f) to the hammering
only position.
3. Set the electronic speed and impact control dial
(g).
4. Fit and adjust the side handle (c).
5. Turn the tool on and start working.
6. Always turn the tool off when work is fi nished and
before unplugging.

MAINTENANCE

Your Berner power tool has been designed to
operate over a long period of time with a minimum
of maintenance. Continuous satisfactory operation
depends upon proper tool care and regular cleaning.
WARNING: To reduce the risk of injury,
turn unit off and disconnect machine
from power source before installing and
removing accessories, before adjusting or
changing setups or when making repairs.
Be sure the trigger switch is in the OFF
position. An accidental start-up can cause
injury.
This machine is not user-serviceable. Take the tool to
an authorised Berner repair agent after approximately
150 hours of use. If problems occur before this time
contact an authorised Berner repair agent.
Brushes (fi g. 3)
The carbon brushes are not user-serviceable. Take the
tool to an authorized Berner repair agent.
The yellow brushwear indicator LED (r) lights up when
the carbon brushes are nearly worn out. After a further
8 hours of use or after the brushes have completely
worn out the motor will automatically be shut off.
Tool maintenance needs to be carried out as soon as
the service indicator (s) lights up.
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