Troubleshooting Guide - Renfert Vario jet Original Bedienungsanleitung

14. Troubleshooting Guide

Fault
Unit doesn't blast,
• Glass pane is not closed.
warning lamp • Magnet (Fig. 42-A) is missing.
flashing. • Protective switch is defect.
Air flow present • Amount of sand too low.
but no sand com- • Filter on suction point of suc-
ing through.
• Suction pipe defect.
No air, no sand. • Nozzle is blocked.
On/Off switch • No power connection.
doesn't work. • Unit fuse (Fig. 13-B) is defect.
Basket shakes, • Basket is stuck mechanically.
doesn't move.
Blasting chamber • Too little suction power.
gets too dusty.
• Extraction unit blocked.
Consumption of • Suction power is too high.
blasting material
too high.
Objects fall out of
• Too many objects.
the basket.
Blasting time too
• The blasting cones are shel-
long / reduced
blasting effect. • Too little working pressure.
• Too great distance from noz-
• Too little blasting material in
• Blasting material lead pipe is
• Blasting nozzle is split.
• Air power of the compressor
Extraction unit
• A certain run-on time is nor-
still runs even
when blasting has
been interrupted.
• The switch for the external ex-
Heavy dust build- • No extraction unit connected.
up during blast- • Extraction power too weak.
ing.
Switch for ex- • Extraction unit is not con-
ternal extraction
does not work.
Foot switch • Unit is in automatic mode.
doesn't work.
EN
Cause
tion pipe is blocked.
tering the objects.
zle.
unit.
blocked / defect.
is too low.
mal in order to remove any
dust still present in the cham-
ber.
traction unit (Fig. 18-F) was
reactivated.
trolled by blasting unit.
• Close the pane.
• Replace the magnet (see spare parts list).
• Exchange during service.
• Fill with more sand.
• Clean the filter.
• Exchange the suction pipe.
• Open the blasting nozzle unit (Fig. 15-A) and
clean the nozzle.
• Connect to the power supply.
• Change fuse (Fig. 13-B) - replacement fuse in
set. If it happens again >>> repair.
• Release by removing and replacing the basket.
• 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.
• Reduce suction power.
Warning: too little suction power can lead to
dirty blasting material.
• Reduce to a maximum of 6 objects.
• 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.
• Regulate the run-on time between 5 and 30
seconds via the control on the back of the unit
(Fig. 21).
• Switch off the external extraction unit.
• Connect an extraction unit.
• Close the air holes (Fig. 42-B).
• Increase extraction power.
• Connect the extraction unit power cable to the
blasting unit.
• Interrupt automatic mode using HOLD button
(Fig. 18-I).
• Switch to manual (Fig. 18-E).
- 6 -
Remedy