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VERS.2015.05.19
7
FAULTS: CAUSES AND CURES
7.1
Fault-finding procedures
Should any fault occur during the use of the machine, turn it off, and isolate it from the
electric supply. Works dealing with the electric system or supply of the machine can only be
done by a qualified electrician.
7.2
Trouble-shooting guide
Trouble
Motor is not running
Motor stops during the cutting,
but can be restarted after a
short period
No water on the core bit
Possible source
No electricity
Defective switch
Defective motor
Fault due to P.R.C.D.
Connection cable section
too small
Defective connection cable
Drilling advance too quick
Core bit is blunt
Defective core bit
Core bit is not
corresponding to the
application
Water supply closed
Water supply system is
blocked up
Kit CDR 353 + NBM 351_MAN_EN
Resolution
Check the electrical
supply (fuse for example)
CAUTION : can only be
solved by qualified
electrician
Change motor or contact
motor manufacturer
Check the earth link on
your electrical supply.
Change the P.R.C.D.
Change connection cable
Change connection cable
Cut slowly
Sharpen the core bit in
calcareous stone
Change core bit
Change core bit
Open the water supply
Clean water supply
system
21
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