Hilti DX 9-ENP Original Operating Instructions page 39

Trouble or fault
The tool doesn't fire.
Fastener stand-off is too low.
Fastener stand-off is too high. The fastener is too close to the
Shear breakages of fasteners
The tool remains compressed
(does not extend when pres-
sure is released).
No fastener is driven.
*2241307*
Possible cause
The tool is clogged with dirt.
The cartridges are unsuitable.
The tool is damaged.
The fastener missed the beam.
Driving power is too high.
The piston is worn.
The wrong piston has been fitted.
edge of the beam.
Driving power is too low.
The tool is clogged with dirt.
The piston is broken.
The tool is damaged.
The fastener was driven into the rib
of the beam.
The supporting material is thicker
and/or of higher strength
The piston jams in the piston stop-
per.
The tool is clogged with dirt.
The piston guide is clogged with
dirt.
The piston wasn't fitted.
The piston is broken.
The fastener guide is clogged with
dirt.
2241307
Action to be taken
▶ Clean the tool.
▶ Contact Hilti Service.
▶ Do not attempt to forcibly
remove cartridges or the
cartridge strip.
▶ Contact Hilti Service.
▶ Mark the position of the beam
and drive another fastener.
▶ Reduce the driving power
(adjust the power regulation) or
use less powerful cartridges – if
available.
▶ Change the piston and piston
stopper together (as a set).
▶ Check that the right piston /
fastener combination is used.
▶ Mark the position of the beam
and drive another fastener.
▶ Increase the driving power
(adjust the power regulation) or
use more powerful cartridges –
if available.
▶ Clean the tool.
▶ Change the piston and piston
stopper together (as a set).
▶ Contact Hilti Service.
▶ Mark the position of the rib of
the beam and then drive another
fastener alongside.
▶ Increase the driving power
(adjust the power regulation) or
use more powerful cartridges –
if available.
▶ If the fastener cannot be driven
correctly even with the tool set
to the highest power setting,
the application is unsuitable.
Contact Hilti Service.
▶ Turn the rotating sleeve and
change the piston and piston
stopper together (as a set).
→ page 27
▶ Clean the tool.
▶ If necessary, turn the rotating
sleeve, disassemble the base
plate → page 27 and clean the
piston guide → page 28.
▶ Fit the piston in the tool.
▶ Change the piston and piston
stopper together (as a set).
▶ Clean the base plate and
the parts attached to it using
the brushes intended for this
purpose.
English 31