Problem
Possible causes
Remedy
Vacuum pump does not
reach the specified final
pressure
● Measurement result dis-
torted
● Check the measurement instru-
ment.
● Check the final pressure without
system connected.
● Vacuum pump or con-
nected accessory conta-
minated
● Clean the vacuum pump.
● Check the components for con-
tamination.
● Operating fluid contami-
nated
● Operate the vacuum pump with
the gas ballast valve open over a
longer period.
● Change the operating fluid.
● Operating fluid level too
low
● Top up the operating fluid.
● Leak in system
● Locate and eliminate the leak.
● Vacuum pump is dam-
aged
● Contact
Pumping speed of vacuum
pump too low
● The intake line is not suit-
ably dimensioned
● Make sure that connections are
short and cross sections ade-
quately dimensioned.
● Exhaust pressure too high
● Check exhaust line outlet open-
ings and exhaust side accesso-
ries.
Loss of operating fluid
● Operating fluid separator
leaking
● Check for leaks.
● Replace the seal as required.
● Radial shaft seal rings
(RSSR) leaking
● Contact
● Exhaust filter saturated or
contaminated
● Change the exhaust filter.
● Exhaust filter and seals
incorrectly assembled
● Check that the exhaust filter and
seals are fitted correctly.
● Operational loss of oper-
ating fluid
● Check the oil return in the oper-
ating fluid separator.
Unusual noises during oper-
ation
● Pumping system is conta-
minated or damaged
● Contact
● Coupling worn
● Contact
● Motor bearing faulty
● Change the motor.
● Contact
Tbl. 11:
Troubleshooting for rotary vane pumps
Malfunctions
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