Operating Instruction DX 9-ENP

*2194400*
2194400 English 15
Trouble or fault Possible cause Action to be taken
The tool doesn’t fire. The tool is clogged with dirt. ▶ Clean the tool.
The cartridges are unsuitable. ▶ Contact Hilti Service.
▶ Do not attempt to forcibly
remove cartridges or the
cartridge strip.
The tool is damaged. ▶ Contact Hilti Service.
Fastener stand-off is too low. The fastener missed the beam. ▶ Mark the position of the beam
and drive another fastener.
Driving power is too high. ▶ Reduce the driving power
(adjust the power regulation) or
use less powerful cartridges – if
available.
The piston is worn. ▶ Change the piston and piston
stopper together (as a set).
The wrong piston has been fitted. ▶ Check that the right piston /
fastener combination is used.
Fastener stand-off is too high. The fastener is too close to the
edge of the beam.
▶ Mark the position of the beam
and drive another fastener.
Driving power is too low. ▶ Increase the driving power
(adjust the power regulation) or
use more powerful cartridges –
if available.
The tool is clogged with dirt. ▶ Clean the tool.
The piston is broken. ▶ Change the piston and piston
stopper together (as a set).
The tool is damaged. ▶ Contact Hilti Service.
Shear breakages of fasteners The fastener was driven into the rib
of the beam.
▶ Mark the position of the rib of
the beam and then drive another
fastener alongside.
The supporting material is thicker
and/or of higher strength
▶ 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.
The tool remains compressed
(does not extend when pres-
sure is released).
The piston jams in the piston stop-
per.
▶ Turn the rotating sleeve and
change the piston and piston
stopper together (as a set).
→ page 11
The tool is clogged with dirt. ▶ Clean the tool.
The piston guide is clogged with
dirt.
▶ If necessary, turn the rotating
sleeve, disassemble the base
plate → page 11 and clean the
piston guide → page 12.
No fastener is driven. The piston wasn’t fitted. ▶ Fit the piston in the tool.
The piston is broken. ▶ Change the piston and piston
stopper together (as a set).
The fastener guide is clogged with
dirt.
▶ Clean the base plate and
the parts attached to it using
the brushes intended for this
purpose.