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5 Faults
NOTICE
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:
Remedy:
● Compressed drilling dust in dry drilling without dust extraction.
● Switch off the drive unit. Protector 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 a dust extractor or drill wet with
ROLLER’S Centro S1, ROLLER’S Centro S3, ROLLER’S Centro S2/3.5 and
ROLLER’S Centro SR.
5.2 Fault: Diamond core drilling crown jams or has diffi culty cutting.
Cause:
Remedy:
● Loose material or steel chips have jammed.
● Brake drilling core and remove loose parts.
● Drilling tube out of round or damaged.
● Change diamond core drilling crown.
5.3 Fault: Diamond core drilling crown has diffi culty cutting.
Cause:
Remedy:
● Wrong speed (ROLLER’S Centro S3, ROLLER’S Centro S2/3,5, ROLLER’S
Centro SR).
● Set the speed accordingly, see 2.2.
● Polished diamond segments.
● Sharpen diamond segments. Drill 10 to 15 mm deep in sandstone, asphalt or a
grinding stone ((55) accessory art. no. 079012) to do this.
● Worn diamond segments.
● Change diamond core drilling crown.
● Water pressure on the water supply device (15) not set correctly.
● Set water pressure accordingly, see 3.2 or 3.5.
5.4 Fault: Diamond core drilling crown does not start drilling, slips to the side.
Cause:
Remedy:
● Diamond core drilling crown applied too abruptly when starting drilling.
● Start drilling with low feed.
● Drive unit not fi xed suffi ciently in the clamping bracket (10).
● Tighten cylinder head screws (8).
● Damaged and untrue running diamond core drilling crown.
● Change diamond core drilling crown.
● Drill stand not fi xed securely.
● Fix the drill stand as described under 3.3.
● Hand-held start drilling without start drilling aid (49).
● Use start drilling aid.
● Vibrations due to switched-on micro-pulse technology
(ROLLER’S Centro DP).
● Switch off the micro-pulse technology for tapping.
5.5 Fault: Drilling core stuck in the diamond core drilling crown.
Cause:
Remedy:
● Compressed drilling dust, parts of the drilling core jammed in the drilling
tube.
● Unscrew the diamond core drilling crown from the drive unit, knock out the
drilling core with a rod, do not damage the connecting thread. Never hit the
jacket of the drilling tube with metal parts (e.g. hammer, wrench). This will dent
the drilling tube inwards and aggravate the risk of the drilling core jamming in
future. The diamond core drilling crown could then be rendered useless. Use a
dust extractor for drilling, see 2.4.2 or wet drill with ROLLER’S Centro S1,
ROLLER’S Centro S3, ROLLER’S Centro S2/3.5 and ROLLER’S Centro SR,
see 2.5.
5.6 Fault: Diamond core drilling crown is diffi cult to release from the drive spindle.
Cause:
Remedy:
● Dirt, corrosion.
● Clean the thread of the drive spindle and the diamond core drilling crown and
oil lightly.
5.7 Fault: Diamond core drilling crown does not work.
Cause:
Remedy:
● PRCD fault current circuit breaker (19) is not switched on.
● Switch on PRCD fault current circuit breaker as described in 2.1.
● Worn carbon brushes.
● Have the carbon brushes changed by qualifi ed personnel or an authorised
ROLLER customer service workshop.
● Mains lead/PRCD defective.
● Have the mains lead/PRCD replaced by qualifi ed personnel or an authorised
ROLLER customer service workshop.
● Diamond core drilling machine defective.
● Have the diamond core drilling machine checked/repaired by an authorised
ROLLER customer service workshop.
5.8 Fault: The micro-pulse technology of ROLLER’S Centro DP switches off during drilling.
Cause:
Remedy:
● The feed rate during drilling is too low.
● Increase the thrust pressure; use a drill stand if necessary.
eng eng
