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Troubleshooting
Fault
Possible cause
Remedy
❑
Pump does not
start.
➨
Electrical power cord
not plugged in, electri-
cal supply failure?
✔
Plug in power cord.
Check fuse.
➨
Supply voltage does
not correspond with
the pump (see rating
plate)?
✔
Connect pump to a suit-
able supply voltage.
➨
Start-up control defec-
tive?
✔
Contact local distributor.
➨
Oil temperature below
54°F (12°C)?
✔
Operate the pump in suit-
able ambient conditions.
➨
Pump unit of rotary
vane pump contami-
nated?
✔
Perform maintenance or
clean the pump unit.
➨
Motor thermally over-
loaded?
✔
Allow motor to cool down
(< 50°C (122°F)), iden-
tify and eliminate cause
of failure. Manual reset
is necessary. Switch off
pump or unplug. Provide
sufficient ventilation.
➨
Overpressure in outlet
line?
✔
Remove blockage in line,
open valve.
➨
Oil mist filter clogged
(filter element in con
-
tact with oil) or over-
filled?
✔
Drain oil, replace filter
element if necessary.
➨
Pump seized?
✔
See below.
❑
Pump does not
achieve its ultimate
vacuum or usual
pumping speed.
➨
Measuring procedure
or vacuum gauge not
suitable for the applica-
tion?
✔
Choose a suitable mea-
suring procedure or vacu-
um gauge.
➨
Inlet blocked?
✔
Open inlet. Ensure that
the inlet line does not be-
come blocked.
➨
Centring ring at small
flange connection not
correctly positioned?
✔
Check small flange con
-
nections.
➨
Long, narrow vacuum
line?
✔
Use lines with larger di-
ameter, length as short as
possible.
