Troubleshooting - Hilti DD 110-D Manual De Instrucciones

steam pressure cleaning equipment or running water for
cleaning. This may negatively affect the electrical safety
of the machine.
8.3 Maintenance
WARNING
Repairs to the electrical section of the machine may
be carried out only by trained electrical specialists.
Check all external parts of the power tool for damage
at regular intervals and check that all controls operate
faultlessly. Do not operate the power tool if parts are
damaged or when the controls do not function faultlessly.
If necessary, the power tool should be repaired by Hilti
Service.
8.4 Replacing the carbon brushes 7
NOTE
The indicator lamp with the wrench symbol lights up
when the carbon brushes need to be replaced.
DANGER
The machine may be operated, serviced and repaired
only by trained, authorized personnel. This personnel
must be specially informed of any possible hazards.

9 Troubleshooting

Fault
The machine doesn't start.
The machine doesn't start and
the service indicator lights.
The machine doesn't start,
carbon brushes have been
changed, service indicator
lights.
The service indicator lights.
Failure to observe the following instructions may result in
contact with dangerous electric voltage.
1.
2.
3.
4.
5.
8.5 Checking the power tool after care and
After carrying out care and maintenance, check that all
protective and safety devices are fitted and that they
function faultlessly.
Possible cause
Interruption in the electric supply.
Carbon brush automatic cut-out acti-
vated.
On/off switch defective.
Interruption in the electric supply.
The electronics are defective.
The carbon brushes are worn.
A fault has occurred in the power tool.
The carbon brushes are worn; the
machine will continue to run for a few
hours.
Disconnect the machine from the electric supply.
Open the carbon brush covers on the left-hand and
right-hand side of the motor.
Take note of how the carbon brushes are fitted and
how the conductors are positioned. Remove the
worn carbon brushes from the machine.
Fit the new carbon brushes just as the old ones were
fitted (spare part numbers: carbon brushes AO ML
100‑127 V: 39577).
NOTE Take care to avoid damaging the insulation
on the indicator lead as you insert the brushes.
Close the carbon brush covers on the left-hand and
right-hand side of the motor and tighten the retaining
screws.
NOTE Once the carbon brushes have been re-
placed, the indicator lamp no longer lights when
the machine is reconnected to the electric supply.
maintenance
Remedy
Plug in another electric appliance
and check whether it works. Check
the plug connections, cables and the
electric supply.
Replace the carbon brushes.
See section: 8.4 Replacing the carbon
brushes 7
The machine should be repaired by
Hilti Service.
Check the supply cord and vacuum
cleaner (if applicable), the extension
cord and supply cord plug, and have
them replaced by a qualified electri-
cian if necessary.
The machine should be repaired by
Hilti Service.
Replace the carbon brushes.
See section: 8.4 Replacing the carbon
brushes 7
If necessary, the power tool should be
repaired by Hilti Service.
The carbon brushes should be
changed.
See section: 8.4 Replacing the carbon
brushes 7
en
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