page 83 of 105
Fault
Possible cause
Remedy
❑
Controller does
not respond when
operating any keys.
No change after
switching off/on.
✔
Contact local distributor.
❑
Pump does not
start or stops im-
mediately. Warning
triangle and pump
symbol are flash
-
ing.
➨
Pump has been ex-
posed to condensate?
✔
Allow pump to run for
some minutes at maxi-
mum speed with atmo-
spheric pressure at the
inlet.
➨
Overpressure in outlet
line?
✔
Remove blockage in line,
open valve.
➨
Motor overloaded?
✔
Allow motor to cool down,
identify and eliminate
cause of failure. Manual
reset is necessary. Switch
off pump or unplug.
❑
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 VSK 3000 di-
rectly at pump inlet - then
check connection, pipe-
line and vacuum system if
necessary.
➨
Wrong setting at con-
troller?
✔
Select function ”Pump
down” with speed set to
”HI” and check again.
➨
Long, narrow vacuum
line?
✔
Use lines with larger di-
ameter, length as short as
possible.
➨
Pump has been ex-
posed to condensate?
✔
Allow pump to run for
some minutes with atmo-
spheric pressure at the
inlet to purge.
➨
Deposits have been
formed inside the
pump?
✔
Clean and inspect the
pump heads.
➨
Diaphragms or valves
damaged?
✔
Replace diaphragms and/
or valves.
➨
Outgassing substances
or vapor generated in
the process?
✔
Check process parame-
ters.
