Hilti DD 150-U Manual De Instrucciones Y Operación página 33

10.2 Diamond core drilling machine is running
Malfunction
Restart interlock
Overheating
Remaining running time un-
til the carbon brushes are
changed.
Running in after carbon
brushes are changed.
Unable to activate
hole-starting mode
*2204401*
Possible cause
The motor has overheated. The
cooling down process is complete.
Supply network fault – the power
supply has been interrupted.
Water in the motor.
Maximum running time with hole-
starting mode activated exceeded.
The diamond core drilling machine
has been overloaded
The motor has overheated. The
diamond core drilling machine is
running in cooling mode.
The carbon brush wear limit has
almost been reached. The diamond
core drilling machine will continue
to run for a few hours until it shuts
down automatically.
The carbon brushes have been
changed and must be run in.
Diamond core drilling machine is
drilling.
The motor has overheated. The
diamond core drilling machine is
running in cooling mode.
2204401
Action to be taken
▶ 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.
▶ 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.
▶ Switch the diamond core drilling
machine off and then on again.
▶ Do not overload the diamond
core drilling machine (e.g. by
repeated disengagement of the
slip clutch).
▶ 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. When normal
temperature is reached the
indication in the display goes
out and the diamond core
drilling machine activates the
restart interlock. Switch the
diamond core drilling machine
off and then on again.
▶ Have the carbon brushes
replaced at the next opportunity.
▶ Run in the carbon brushes by
letting the machine run under
no load for at least 1 minute
without interruption.
▶ Turn the hand wheel until the
core bit is no longer in contact
with the base material.
▶ Complete the cooling process.
English 25