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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.: 999248 / 28/04/2011
Attention: All error messages including a flashing warning triangle have to be confirmed (de
-
leted) by pressing key START/STOP.
Fault
Possible cause
Remedy
❑
Pump does not achieve
ultimate vacuum or nor-
mal pumping speed.
➨
Wrong settings at controller?
✔
Select function ”Pump down”
with speed set to ”HI” and
check again.
➨
Centring ring at a small flange
connection not correctly posi-
tioned or leak in the pipeline
or vacuum system?
✔
Check pump directly - con
-
nect controller directly at
pump inlet - then check con
-
nection, pipeline and vacuum
system if necessary.
➨
Long, narrow vacuum line?
✔
Use lines with larger di-
ameter, 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 defec-
tive?
✔
Replace diaphragms and/or
valves.
➨
Outgassing substances or
vapour generated in the proc-
ess?
✔
Check process parameters.
➨
Pump too hot?
✔
Allow pump to cool down.
Determine and eliminate the
cause of overheating.
➨
Pressure for automatic
switching off reached?
✔
Adapt pressure for automatic
switching off, if necessary.
