Operating Instruction DD 350-CA (01)

Table Of Contents
18 English
Malfunction Possible cause Action to be taken
Water escapes from the
chuck during operation.
The diamond core bit isn’t securely
tightened in the chuck.
Tighten the diamond core bit
securely.
Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
The core bit connection end /
chuck is dirty.
Clean and grease the connec-
tion end and/or the chuck.
The chuck seal or connection end
is defective.
Check the seal and replace it if
necessary.
The drilling system has too
much play.
The diamond core bit isn’t securely
tightened in the chuck.
Tighten the diamond core bit
securely.
Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
The core bit connection end /
chuck is defective.
Check the connection end and
chuck and replace them if
necessary.
The connection between the dia-
mond core drilling machine and the
carriage or spacers is loose.
Check the connection and,
if necessary, refasten the
diamond core drilling machine.
The carriage has too much play. Adjust the play between the rail
and carriage. page 16
Screws / bolts on the drill stand are
loose.
Check the security of screws
/ bolts on the drill stand and
tighten them if necessary.
The drill stand is inadequately fas-
tened.
Fasten the drill stand more
securely.
8.2 The diamond core drilling machine is not in working order
Malfunction Possible cause Action to be taken
The service indicator shows
nothing.
The PRCD isn’t switched on. Check that the PRCD is
functioning and switch it on.
Interruption in the electric supply. Plug in another electric tool or
appliance and check whether it
works.
Check the plug connections,
supply cord, power supply line
and main supply fuse.
Temperature, overvoltage or
undervoltage indicator is lit.
The motor has overheated. Switch the diamond core drilling
machine off (press off-switch in
the middle) and back on again.
Check the water supply. After
cooling down, the diamond core
drilling machine is ready for use
again.
Temperature, overvoltage
or undervoltage indicator is
flashing.
Fault in the power supply. Switch the diamond core drilling
machine off (press off-switch
in the middle) and back on
again. Check the power supply
(especially during operation by
generator or transformer).
Printed: 18.10.2017 | Doc-Nr: PUB / 5236054 / 000 / 02