page 84 of 105
Fault
Possible cause
Remedy
❑
Pump does not
achieve its ultimate
vacuum or usual
pumping speed.
➨
Pressure below ”Mini-
mum” in Auto mode?
✔
Change switch off pres-
sure (”Minimum”) if neces-
sary.
➨
Pump too hot?
✔
Allow pump to cool down.
Determine and eliminate
the cause of overheating.
❑
Pump too noisy.
➨
Atmospheric or high
pressure at the pump
inlet?
✔
Connect hose or silencer
to pump outlet. Be careful
not to cause outlet over-
pressure, especially with
condensable vapors.
➨
Diaphragm crack or
diaphragm clamping
disc loose?
✔
Perform maintenance.
➨
Other than above men-
tioned causes?
✔
Contact local distributor.
❑
Pump seized.
✔
Contact local distributor.
➨
A service manual with exploded view drawings, spare parts list and
directions for repair is available on request.
+
The service manual is intended for trained service people only.
* only if ”
Sound
” ”On” is selected
** VMS: Vacuum management system to switch non-VARIO pumps
