Hilti DG 150 Mode D'emploi page 25

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▶ Never operate the grinder with the air vents blocked. Clean the air vents carefully using a dry brush. Do
not permit foreign matter to penetrate inside the product.
▶ Clean the outside of the device at regular intervals with a slightly damp cloth. Do not use a sprayer,
steam pressure cleaning equipment or running water for cleaning.
6.1 Removing the guard lamellar seal
1. Remove the diamond cup wheel. → page 20
2. Use a screwdriver to ease the three clamping tongues of the retaining ring over the edge of the guard.
3. Remove the large lamellar seal from the retaining ring.
4. Push the tip of a screwdriver into the two slots in the outside of the guard and disengage the small
lamellar seal.
6.2 Installing the guard lamellar seal
1. Remove coarse dust from the retaining grooves.
2. Press the small lamellar seal into the guide in the guard until it engages.
3. Position the large lamellar seal in the groove of the retaining ring.
4. Push the retaining ring complete with lamellar seal over the edge of the guard until it engages.
7 Troubleshooting
7.1 DG 150
Trouble or fault
The tool can't be switched
on.
The tool doesn't achieve full
power.
The LED blinks red.
A lot of dust escapes from the
guard.
Printed: 28.11.2017 | Doc-Nr: PUB / 5069653 / 000 / 04
Possible cause
Interruption in the electric supply.
Supply voltage is too low.
The power tool has overheated.
No vacuum cleaner is connected.
The lamellar seal is not flush with
the working surface, allowing dust
to escape between the guard and
the working surface.
The lamellar seal is worn.
Suction performance of the vac-
uum cleaner is too low as the filter
is clogged with dirt or dust.
Action to be taken
▶ Slide the on / off switch to the
"off" (0) position and then back
to the "on" position (I).
▶ Use a compatible electric
supply.
▶ Switch the power tool off and
allow it to cool down until the
red LED goes out.
▶ Connect a vacuum cleaner.
▶ Adjust the position of the guard
relative to the working surface.
▶ Replace the lamellar seal.
▶ If the automatic filter cleaning
system is deactivated, activate
it and allow the vacuum cleaner
to run for 30 seconds.
▶ Close the end of the hose with
your hand and allow the vacuum
cleaner to run for 30 seconds.
▶ Use a water hose to rinse the
V 20/40 universal filter and the
VC 20/40 performance filter.
Never beat out the filter against
a wall or floor as this may result
in microholes that allow dust to
pass through.
▶ Change the filter.
English 21