Hilti DD 150-U Mode D'emploi page 62

Malfunction
Overheating
Remaining running time un-
til the carbon brushes are
changed.
Running in after carbon
brushes are changed.
Unable to activate
hole-starting mode
Undervoltage - diamond core
drilling machine does not
develop full power.
Multifunction display indi-
cates "0" at the gear dis-
play and the diamond core
bit doesn't rotate.
Connection has been inter-
rupted
54 English
Possible cause
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.
Supply network fault – undervolt-
age occurred.
The gear selector isn't engaged.
Existing Bluetooth connection has
been separated.
Action to be taken
▶ 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
indicator goes out and the
diamond core drilling machine
switches to 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.
▶ Check whether other power
consumers are disrupting the
power supply from the network
or generator.
▶ Check the length of the exten-
sion cord used.
▶ Operate the gear selector until
it engages.
▶ Make sure there is a clear line of
sight between the product and
the accessory. Local conditions
such as reinforced concrete
walls, for example, can affect
the quality of the connection.
▶ Connect the accessories to the
diamond core drilling machine
again.
2204400
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