VACUUBRAND MV 10 NT VARIO - Manual (Page 88)

page 88 of 126
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.