Dd 250: The Diamond Core Drilling Machine Is Not In Working Order - Hilti DD 250 Manual De Usuario

Malfunction
The drilling system has too
much play.

8.3 DD 250: The diamond core drilling machine is not in working order

Malfunction
The multifunction display is
not showing anything.
Service required.
Restart interlock.
Overheating.
26
Possible cause
The carriage has too much play.
Screws / bolts on the drill stand are
loose.
The drill stand is inadequately fas-
tened.
Possible cause
The PRCD isn't switched on.
Interruption in the electric supply.
Water in the motor.
The carbon brushes are worn out.
Water in the motor.
The motor has overheated. The
cooling down process is complete.
Supply network fault – the power
supply has been interrupted.
Maximum running time with hole-
starting mode activated exceeded.
Water in the motor.
The diamond core drilling machine
has been overloaded.
The motor has overheated.
Action to be taken
▶ Adjust the play between the rail
and carriage.
▶ Check the security of screws
/ bolts on the drill stand and
tighten them if necessary.
▶ Fasten the drill stand more
securely.
Action to be taken
▶ Check that the PRCD is
functioning and switch it on.
▶ 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.
▶ Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
▶ Replace the carbon brushes.
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▶ Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Check whether other power
consumers are disrupting the
power supply from the network
or generator.
▶ Check the length of the exten-
sion cord used.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Allow the diamond core drilling
machine to dry out completely
in a warm, dry place.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Wait a few minutes until the
motor has cooled down or
allow the diamond core drilling
machine to run under no load in
order to speed up the cooling
process. Switch the diamond
core drilling machine off and
then on again.