Hilti DD 110-W Mode D'emploi page 17

Fault
The machine doesn't start.
The machine doesn't start and
en
the service indicator lights.
The machine doesn't start,
carbon brushes have been
changed, service indicator
lights.
The service indicator lights.
The service indicator blinks.
The machine doesn't start, theft
protection indicator blinks yel-
low.
The motor runs. The diamond
core bit doesn't rotate.
The rate of drilling progress de-
creases.
The diamond core bit cannot be
fitted into the chuck.
Excessive play in the drilling
system.
Water escapes at the water
swivel or gear housing.
Water escapes from the chuck
during operation.
14
Possible cause
Water in the machine.
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.
Motor speed error.
The power tool has not been un-
locked (tools with optional theft pro-
tection system).
The gear selector doesn't engage.
The gearing is defective.
The diamond core bit is polished.
The diamond core bit is polished.
The core is stuck in the core bit.
Maximum drilling depth is reached.
The diamond core bit is damaged.
The slip clutch is disengaging prema-
turely or slipping.
Drilling progress is prevented by an
accumulation of dust.
Water pressure / flow rate too high.
The water flow rate is too low.
The core bit connection end or chuck
is dirty or damaged.
The core bit is not screwed securely
into the chuck.
The core bit connection end is defec-
tive.
The water pressure is too high.
The shaft seal is defective.
The core bit is not screwed securely
into the chuck.
The core bit connection end / chuck
is dirty.
The chuck or connection end seal is
defective.
Remedy
Dry the machine.
The machine should be repaired by
Hilti Service.
Replacing the carbon brushes
See section: 8.4 Replacing the carbon
brushes 8
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 8
Have the appliance repaired by Hilti
Service.
Use the TPS key to unlock the power
tool.
Move the gear selector until felt to
engage.
The machine should be repaired by
Hilti Service.
Sharpen the core bit by drilling into a
sharpening plate.
The wrong type of core bit has been
used. Seek advice from Hilti.
Remove the core.
Remove the core and use a core bit
extension.
Check the diamond core bit for dam-
age and replace it if necessary.
The machine should be repaired by
Hilti Service.
Use a suitable vacuum cleaner.
Reduce the water flow rate by adjust-
ing the flow regulator.
Adjust (open) the water flow regulator.
Check the water supply.
Clean the connection end /chuck or
replace if necessary.
Tighten it securely.
Check the connection end and re-
place it if necessary.
Reduce the water pressure.
The machine should be repaired by
Hilti Service.
Tighten it securely.
Clean the connection end / chuck.
Check the seal and replace it if nec-
essary.