Owner manual

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.: 999223 / 08/07/2009
page 22 of 34
6 Troubleshooting
Fault Possible cause Remedy
❑
Pump does not start or
stops immediately.
➨
Supply voltage too low or
powersupplyfailure?
✔
Check supply voltage. Check
fuse.
➨
Control signal for motor speed
ismissing?
✔
Check control signal.
➨
Pressure in outlet pipeline too
high?
✔
Remove blockade 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 mains.
❑
Pump does not achieve
its ultimate vacuum or
usual pumping speed.
➨
Leak in the pipeline or vacu-
umsystem?
✔
Check pump directly - con-
nect vacuum gauge directly
at pump inlet - then check
connection, pipeline and
vacuum system if necessary.
➨
Long,narrowline?
✔
Use lines with larger dia-
meter, 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 dam-
aged?
✔
Replace diaphragms and/or
valves.
➨
Outgassing substances or va-
porgeneratedintheprocess?
✔
Check process parameters.
➨
Pump temperature too high
(motorspeedreduced)?
✔
Ensuresufcientcoolingof
the pump or reduce inlet pres-
sure.
❑
Pump too noisy.
➨
Loudexhaustnoise?
✔
Connect hose or silencer to
pump outlet.
➨
Diaphragm crack or dia-
phragmclampingdiscloose?
✔
Perform maintenance.
➨
Other than above mentioned
causes?
✔
Contact local distributor.
❑
Pump seized.
✔
Contact local distributor.