Renfert Vario jet, Faq, Page: 5 / 28

EN - 1 -
FAQ - English
For information on operating elements, see Fig. 1 on page 2 of this document.
Fault Cause Remedy
Unit doesn’t blast,
warning lamp
flashing.
• Glass pane is not closed.
• Magnet (Fig. 42-A) is missing.
• Protective switch is defect.
• Close the pane.
• Replace the magnet (see spare parts list).
• Exchange during service.
Air flow present
but no sand com-
ing through.
• Amount of sand too low.
• Filter on suction point of suc-
tion pipe is blocked.
• Suction pipe defect.
• Fill with more sand.
• Clean the filter.
• Exchange the suction pipe.
No air, no sand. • Nozzle is blocked. • Open the blasting nozzle unit (Fig. 15-A) and
clean the nozzle.
On / Off switch
doesn’t work.
• No power connection.
• Unit fuse (Fig. 13-B) is defect.
• Connect to the power supply.
• Change fuse (Fig. 13-B) - replacement fuse in
set. If it happens again >>> repair.
Basket shakes,
doesn’t move.
• Basket is stuck mechanically. • Release by removing and replacing the basket.
Blasting chamber
gets too dusty.
• Too little suction power.
• Extraction unit blocked.
• Raise suction power on extraction unit.
• Increase suction performance by closing the air
inlet boreholes under the glass holder (Fig. 42-B)
(with the supplied magnetic strip).
• Clean extraction unit.
Consumption of
blasting material
too high.
• Suction power is too high. • Reduce suction power.
Warning:
too little suction power can lead to
dirty blasting material.
Objects fall out of
the basket.
• Too many objects. • Reduce to a maximum of 6 objects.
Blasting time too
long / reduced
blasting effect.
• The blasting cones are shel-
tering the objects.
• Too little working pressure.
• Too great distance from noz-
zle.
• Too little blasting material in
unit.
• Blasting material lead pipe is
blocked / defect.
• Blasting nozzle is split.
• Air power of the compressor
is too low.
• Remove blasting cones before starting.
• Increase working pressure >>> recommended
working pressure: 4 - 5 bar [58 - 72.5 psi].
• Move nozzle further forward.
• Unit should be filled with min. 4 - 5 kg blasting
material.
• Remove sand and check / replace lead pipe.
• Replace nozzles.
• Dehydrate the compressor. Use a more powerful
unit.