Notice – VACUUBRAND PC 301 User Manual
Page 28
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999147 / 17/06/2014
page 28 of 40
A
service manual with exploded view drawings, spare part lists and directions for
repair is available on request (only in German or English).
☞
The service manual is for trained service people.
NOTICE
Fault
Possible cause
Remedy
❑ Pump does not achieve
its ultimate vacuum or
usual pumping speed.
➨ Leak in the pipeline or vacu-
um system?
✔ Check pump directly with
DVR 2 for ultimate vacuum
- close inlet of pumping unit
to do so - then check con-
nection, pipeline and vacuum
system if necessary
➨ Long, narrow line?
✔ Use lines with larger dia-
meter, length as short as
possible.
➨ Pump has been exposed to
condensate?
✔ Allow pump to run for some
minutes with atmospheric
pressure at the inlet.
➨ Deposits have been formed
inside the pump?
✔ Clean and inspect the pump
heads.
➨ Diaphragms or valves dam-
aged?
✔ Replace diaphragms and/or
valves.
➨ Outgassing substances or
vapour generated in the pro-
cess?
✔ Check process parameters.
❑ Pump too noisy.
➨ Atmospheric or high pressure
at the pump inlet?
✔ Connect hose or silencer to
pump outlet.
➨ Diaphragm crack or dia-
phragm clamping disc loose?
✔ Perform maintenance.
➨ Other than above mentioned
causes?
✔ Contact local distributor.
❑ Pump seized.
✔ Contact local distributor.