Hilti DD 150-U Mode D'emploi page 49

Fault
Drilling speed drops.
The motor cuts out.
en
The handwheel turns but does-
n't engage.
Water escapes at the water
swivel or gear housing.
No water flows.
The diamond core bit cannot be
fitted into the chuck.
Water escapes from the chuck
during operation.
Excessive play in the drilling
system.
10 Disposal
Most of the materials from which Hilti machines or appliances are manufactured can be recycled. The materials must
be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for taking
back old machines and appliances for recycling. Ask Hilti customer service or your Hilti representative for further
information.
For EC countries only
Disposal of electric appliances together with household waste is not permissible.
In observance of the European Directive on waste electrical and electronic equipment and its imple-
mentation in accordance with national law, electrical appliances that have reached the end of their life
must be collected separately and returned to an environmentally compatible recycling facility.
42
Possible cause
The water flow rate is too low.
The machine has stalled.
The machine is too hot. The motor
overheating protection system has
been activated.
The electronics are defective.
The cooling fan is defective.
The retaining pin is broken.
The water pressure is too high.
The shaft seal is defective.
The filter or water flow indicator is
blocked.
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 / chuck
is dirty.
The chuck or connection end seal is
defective.
The core bit is not screwed securely
into the chuck.
The leveling screws or clamping
spindle are not tightened.
Excessive play at the carriage.
The core bit connection end is defect-
ive.
Remedy
Adjust (open) the water flow regulator.
Check the water supply.
Guide the machine straight.
Relieve the load on the machine and
press the switch several times to re-
start.
The machine should be repaired by
Hilti Service.
The machine should be repaired by
Hilti Service.
Fit a new retaining pin.
Reduce the water pressure.
The machine should be repaired by
Hilti Service.
Remove the filter or water flow indic-
ator and flush it through.
Clean the connection end /chuck or
replace if necessary.
Tighten it securely.
Clean the connection end / chuck.
Check the seal and replace it if ne-
cessary.
Tighten it securely.
Tighten the leveling screws or clamp-
ing spindle.
Adjust the play between rail and car-
riage.
See section: 8.6 Adjusting the play
between rail and carriage
Check the connection end and re-
place it if necessary.