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reduces the motor current – and thus the turning speed of the drive unit – to a
minimum. The drive unit does not shut down how ever. As the feed pressure is
reduced, the turning speed of the drive unit is increased once more. This
procedure, even if it is repeated several times in succession, prevents damage
to the drive unit. If the motor remains stopped despite the reduction in feed
pressure, the drive unit must be shut down and the diamond core drilling crown
freed manually (see 5.).
WARNING
Pull out the mains plug!
3.6. Removal of the drilling core
NOTICE
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.
NOTICE
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 (available as an
accessory) should be used. Start by drilling in as far as possible in the normal
way.
If the stroke distance of the drill upright, and boring depth within the usa ble
boring depth of the diamond core drilling crown, are insufficient, proceed as
follows:
WARNING
Unplug from the mains power supply! Do not pull the diamond core drilling
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 exten sion (50) between the diamond core
drilling crown and drive unit.
If the usable drilling depth of the diamond-tipped annular core is insufficient,
proceed as follows:
5. Faults
NOTICE
Do not switch the drive unit on and off to loosen a jammed diamond core drilling crown!
5.1. Fault: Diamond core drilling crown jammed.
Cause:
● Compressed drilling dust in dry drilling without dust extraction.
5.2. Fault: Diamond core drilling crown jams or has difficulty cutting.
Cause:
● Loose material or steel chips have jammed.
● Drilling tube out of round or damaged.
5.3. Fault: Diamond core drilling crown has difficulty cutting.
Cause:
● Wrong speed (REMS Picus S3, REMS Picus S2/3,5, REMS Picus SR).
● Polished diamond segments.
● Worn diamond segments.
● Water pressure on the water supply device not set correctly.
5.4. Fault: Diamond core drilling crown does not start drilling, slips to the side.
Cause:
● Diamond core drilling crown applied too abruptly when starting drilling.
● Drive unit not fixed sufficiently in the clamping bracket.
● Damaged and untrue running diamond core drilling crown.
● Drill stand not fixed securely.
WARNING
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
Pull out the mains plug before maintenance and repair work! This work
may only be performed by qualified personnel.
4.1. Maintenance
WARNING
Pull out the mains plug before maintenance work!
Check the function of the PRCD fault current circuit breaker regularly (see 2.1.).
Keep the drive unit and handles clean. Clean the drill stand and diamond core
drilling crown with water after finishing the drilling work. Blow out the air vents
on the motor from time to time. Keep the drilling crown connecting thread on
the drive unit and the connecting thread of the diamond core drilling crown
clean and oil from time to time. Clean plastic parts (e.g. housing) only with
REMS CleanM machine cleaner (Art. No. 140119) or a mild soap and a damp
cloth. Do not use household cleaners. These often contain chemicals which
can damage the plastic parts. Never use petrol, turpentine, thinner or similar
products for cleaning.
Make sure that liquids never get onto or inside the electric diamond core drilling
machine. Never immerse the electric diamond core drilling machine in liquid.
4.2. Inspection/Maintenance
WARNING
Pull out the mains plug before maintenance and repair work! This work
may only be performed by qualified personnel.
The gear runs in a life-long grease filling and therefore needs no lubrication.
The motors of REMS Picus S1, REMS Picus S3, REMS Picus S2/3,5 and
REMS Picus SR have carbon brushes. These are subject to wear and must
therefore by checked and changed by qualified specialists or an authorised
REMS customer service workshop from time to time. It is recommended to
send in the drive units to an authorised REMS customer service workshop for
inspection/repair after about 250 operating hours or at least once a year.
WARNING
This is independent of any local rules that may apply with respect to the
operation of electrical equipment on construction sites.
Remedy:
● Switch off the drive unit. Pull out the mains plug. Move the diamond core
drilling crown to and fro with a size 41 open-ended wrench until it is freed
again. Continue drilling carefully. Use dust extraction or wet drilling.
Remedy:
● Brake drilling core and remove loose parts.
● Change diamond core drilling crown.
Remedy:
● Set the speed accordingly, see 2.2.
● Sharpen diamond segments. Drill 10 to 15 mm deep in sandstone, asphalt or a
grinding stone (55) (accessory, Art. No. 079012) to do this.
● Change diamond core drilling crown.
● Set water pressure accordingly, see 3.2. or 3.5.
Remedy:
● Start drilling with low feed.
● Tighten cylinder head screws (8).
● Change diamond core drilling crown.
● Fix the drill stand as described under 3.3.
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