User guide

page 48 of 61
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 ashing warning triangle have to be conrmed (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ange
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.