Troubleshooting – VACUUBRAND RZ 9 User Manual
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Troubleshooting
Fault
Possible cause
Remedy
❑ Pump does not
start.
➨ Electrical power cord
not plugged in, electri-
cal supply failure?
✔ Plug in power cord.
Check fuse.
➨ Supply voltage does
not correspond with
the pump (see rating
plate)?
✔ Connect pump to a suit-
able supply voltage.
➨ Oil temperature below
54°F (12°C)?
✔ Operate the pump in suit-
able ambient conditions.
➨ Pump unit contami-
nated?
✔ Perform maintenance or
clean the pump unit.
➨ Motor thermally over-
loaded?
✔ Allow motor to cool down,
identify and eliminate
cause of failure. Manual
reset is necessary. Switch
off pump or unplug. Pro-
vide sufficient ventilation.
➨ Overpressure in outlet
line?
✔ Remove blockage in line,
open valve.
➨ Oil mist filter clogged
(filter element in con-
tact with oil)?
✔ Drain oil, replace filter
element if necessary.
❑ Pump does not
achieve its ultimate
vacuum or usual
pumping speed.
➨ Centring ring at small
flange connection not
correctly positioned, or
leak in the pipeline or
vacuum system?
✔ Check pump directly -
connect vacuum gauge
directly at pump inlet -
then check connection,
pipeline and vacuum
system if necessary.
➨ Long, narrow vacuum
line?
✔ Use lines with larger di-
ameter, length as short as
possible.
➨ Oil contaminated (also
with solvents)?
✔ Change oil and flush with
oil (see ”Oil change”).
➨ Not enough oil?
✔ Top up oil to correct level.
➨ Measuring procedure
or vacuum gauge not
suitable for the applica-
tion?
✔ Choose a suitable mea-
suring procedure or vacu-
um gauge.
➨ Pump has not yet
reached its operating
temperature?
✔ Allow the pump to reach
its operating temperature.