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Trouble or fault
The machine doesn't
start, the green "ready"
lamp doesn't light.
The machine doesn't
start, green "ready"
lamp and red "fault"
lamp both light.
The machine doesn't
start even though the
green "ready" lamp
lights.
230 V power outlet
doesn't work.
The ground fault circuit
interrupter is tripped.
8 Disposal
8.1 Disposal
Most of the materials from which Hilti tools and appliances are manufactured can
be recycled. The materials must be correctly separated before they can be recycled.
Possible cause
One phase is missing or its
voltage is too low.
The fuse in the control unit
has blown.
The drive power cable or the
control cable is not plugged
into the control unit.
The thermal protective mo-
tor cut-out has switched the
machine off due to overheat-
ing.
The converter overload pro-
tection device has switched
the machine off.
The emergency stop button
is pushed in.
No neutral conductor in the
electric supply (3P + N + PE)
The automatic circuit
breaker has tripped.
Insulation fault
Total leakage current ex-
ceeds the triggering thresh-
old of the ground fault circuit
interrupter.
Action to be taken
▶ Check the three phases
individually.
▶ Check the extension
cable, plug and power
outlet for faults or loose
contacts.
▶ Replace the blown fuse
(spare fuses located in the
control unit).
▶ Connect the cable.
▶ Use more or cleaner
cooling water.
▶ Do not overload the
machine.
▶ Shade the control unit
from the sun.
▶ Check that the control unit
cooling system is working
and replace the filter if
necessary.
▶ Release the emergency
stop button.
▶ Check the electric supply.
▶ Eliminate the fault and
reset the automatic circuit
breaker.
▶ Have the machine and
supply cables checked
by a trained electrical
specialist.
▶ Disconnect other appli-
ances from the electric
supply you are using (es-
pecially appliances with
HF drive).
English
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