VACUUBRAND RZ 9 - Manual (Page 40)

page 40 of 49
Fault Possible cause Remedy
❑ Pump does not
achieve its ultimate
vacuum or usual
pumping speed.
➨ Outgassing substances
or vapor generated in
the process?
✔ Check process parame-
ters.
➨ Inlet blocked? ✔ Open inlet. Ensure that
the inlet line does not be-
come blocked.
➨ None of the above
mentioned causes?
✔ Contact local distributor.
❑ Pump too noisy or
strange noise.
➨ Too much oil? ✔ Lower oil level to mark
”max.”.
➨ Loud exhaust noise? ✔ Connect a hose or as-
semble an oil mist filter at
the outlet.
➨ None of the above
mentioned causes?
✔ Contact local distributor.
❑ Oil in the inlet line. ➨ Back diffusion (small
amount of oil, oil film)?
✔ Install a sorption trap or a
separator, if necessary.
➨ Back streaming (large
amount of oil)?
✔ Contact local distributor.
❑ Oil leakage. ➨ Oil spilled? ✔ Absorb the oil and dis-
pose of according to reg-
ulations.
➨ Other cause? ✔ Contact local distributor.
❑ High oil consump-
tion.
➨ High inlet pressure? ✔ Normal. Top up oil when-
ever necessary. Install oil
mist filter at outlet.
➨ Operation with gas bal-
last?
✔ Top up oil whenever nec-
essary. Install oil mist filter
at outlet.
➨ Oil level too high? ✔ Lower oil level to mark
”max.”.
❑ Fast aging of the
oil.
➨ Pumping aggressive
gases?
✔ Use suitable oil.
➨ Condensation in the
pump?
✔ Use separator or cold
trap.
➨
A service manual with exploded view drawings, spare parts list and
directions for repair is available on request.
+
The service manual is intended for trained service people only.