Manufacturer's Warranty - Roller Centro S 1 Instructions D'emploi

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3.6. Removal of the drilling core
Important: When carrying out vertical drilling, e.g. in a ceiling, note that
the drilling core normally drops out as soon as the hole is complete! Take
appropriate steps to ensure that personal injury or material damage does
not result.
If the drilling core remains hanging in the diamond core drilling crown
after the core-drilling operation is complete, the bit must be unscrewed
from the drive unit and the drilling core knocked out with a rod.
Important: NEVER hit the casing of the drilling core with a metal item
such as a hammer or wrench in order to loosen the drilling core. This
will cause the casing pipe to become dented, which will make blocking
of the drilling core even more likely on future occasions. The diamond
core drilling crown may then be rendered unusable.
If the core-drilling operation does not penetrate fully, the drilling core can
be broken up, down to a depth of 1.5 x Ø, by inserting a tool such as a
chisel into the drilling gap. If the drilling core cannot be secured, use a
tool such as a hammer drill to make an angled hole into the drilling core,
and insert a rod to extract it.
3.7. Extending the diamond core drilling crown
If the stroke distance of the drill upright, or the useful drilling depth of the
diamond core drilling crown, is insufficient, an annular-bit extension (avai-
lable as an accessory) should be used. Start by drilling in as far as pos-
sible in the normal way.
If the stroke distance of the drill upright, and boring depth within the
usable boring depth of the diamond core drilling crown, are insufficient,
proceed as follows:
Unplug from the mains power supply. Do not pull the diamond core dril-
ling crown out of the core-drilling hole. Detach the diamond core drilling
crown from the drive unit (see 2.3.2.). Turn back the drive unit without
the diamond core drilling crown. Fit the annular-bit extension (50) bet-
ween the diamond core drilling crown and drive unit.
If the usable drilling depth of the diamond-tipped annular core is insuf-
ficient, proceed as follows:
Unplug from the mains power supply. Detach the diamond core drilling
crown from the drive unit (see 2.3.2.). Turn back the drive unit without
the diamond core drilling crown. Pull the diamond core drilling crown out
of the core-drilling hole. Break up the drilling core (see 3.6.), and remove
it from the core-drilling hole. Reinsert the diamond core drilling crown
into the hole. Fit the annular-bit extension (50) between the diamond
core drilling crown and drive unit.
4. Maintenance
Always disconnect at the mains plug before carrying out servicing or
repair work.
4.1. Maintenance
Carry out regular checks of the PRCD fault-current safety switch (see
3.). Keep the drive unit and handles clean. When the drilling operation
is complete, clean the drill upright and annular bit with water. Blow out
the ventilation opening of the motor from time to time with a compres-
sed-air hose. Keep the crown connection thread on the drive unit and
the connection thread on the diamond core drilling crown clean and
apply oil from time to time.
4.2. Inspection/Maintenance
Always unplug the unit from the mains supply before carrying out main-
tenance work. These tasks must be carried out by properly qualified or
suitably trained persons.
The motors of the ROLLER'S Centro S1, ROLLER'S Centro S3 and
ROLLER'S Centro S2/3,5 are fitted with carbon brushes. These are sub-
ject to wear, and must be checked at regular intervals and replaced as
required. We recommend having the drive units inspected and main-
tained after every 250 operating hours, or at least once a year, by an
authorised ROLLER customer service provider.
This is independent of any local rules that may apply with respect to the
operation of electrical equipment on construction sites.
5. Troubleshooting
Important: DO NOT switch the drive unit on and off in an attempt to
free a blocked diamond core drilling crown.
5.1. Fault: diamond core drilling crown jams.
Cause: Possibly caused by compressed drilling dust resulting from
dry-boring without a dust extraction system.
Remedy: Switch off drive unit. Use an SW 41 wrench to turn the dia-
mond core drilling crown back and forth in order to free it.
Carefully continue the drilling operation. Use a dust extrac-
tion system, or wet-boring.
5.2. Fault: diamond core drilling crown jams or cuts only with difficulty.
Cause: Loose material or metal debris have jammed up the mecha-
nism.
Remedy: Break up the drilling core and remove loose items.
Cause: Casing pipe is out-of-true or damaged.
Remedy: Use a new diamond core drilling crown.
5.3. Fault: diamond core drilling crown cuts with difficulty.
Cause: Incorrect turning speed (ROLLER'S Centro S3,
ROLLER'S Centro S2/3,5).
Polished diamond-tipped segments.
Remedy: Increase feed pressure.
Sharpen the diamond-tipped segments. This is done by dril-
ling into sandstone, asphalt or a sharpening stone (available
as an accessory) to a depth of 10 mm to 15 mm.
Cause: Worn diamond-tipped segments.
Remedy: Use a new diamond core drilling crown.
5.4. Fault: diamond core drilling crown does not tap a hole, or slips to
one side.
Cause: Excess pressure on the diamond core drilling crown during
tapping.
Remedy: Operate at a reduced feed rate.
Cause: The drive unit is incorrectly secured to the clamping angle
Remedy: Check the drill collar to ensure that it is correctly attached to
the drive unit.
Cause: Damaged or out-of-true diamond core drilling crown.
Remedy: Use a new diamond core drilling crown.
Cause: Drill upright not properly secured.
Remedy: Tighten fixing screw and adjustment screws.
5.5. Fault: Drilling core remains hanging in diamond core drilling crown.
Cause: Compressed drilling dust in casing pipe jams parts of the
drilling core.
Remedy: DO NOT knock the casing pipe with metal objects of any kind
(e.g. hammer, wrench). This will cause the casing pipe to be-
come dented, which will make blocking of the drilling core
even more likely on future occasions. The diamond core dril-
ling crown may then be rendered unusable.
Unscrew the diamond core drilling crown from the drive unit,
eject the drilling core with a rod, taking care not to damage
the connection thread.
5.6. Fault: diamond core drilling crown is detached from drive spindle
with difficulty.
Cause: Dirt, corrosion.
Remedy: Clean and slightly oil the thread of the drive spindle and the
diamond core drilling crown.
5.7. Fault: Drive unit will not run.
Cause: Fault-current safety switch PRCD (19) not actuated.
Remedy: Check PRCD (see 3.).
Contact an electrician.

6. Manufacturer's Warranty

The warranty period shall be 12 months from delivery of the new product
to the first user but shall be a maximum of 24 months after delivery to the
Dealer. The date of delivery shall be documented by the submission of
the original purchase documents, which must include the date of purchase
and the designation of the product. All functional defects occurring within
the warranty period, which clearly the consequence of defects in produc-
tion or materials, will be remedied free of charge. The remedy of defects
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