Malfunction Possible cause Corrective action
TURBOVAC does not
start.
Motor connection cable not attached, is
loose or is defective.
Pump has seized.
Check the motor connection cable and connect correctly;
replace if necessary.
Replace the pump.
TURBOVAC generates
loud running noises and
vibrations.
Rotor is out of balance.
Bearing is defective.
Pump running within the natural frequency
range of the system, causing resonance.
Balance the rotor (only by the Leybold Service
Department).
Bearings will have to be replaced (only by the Leybold
Service Department).
Change the masses of the system or install vibration
damper to isolate oscillations.
The TURBOVAC does
not achieve ultimate
pressure.
Measurement device is defective.
Measurement gauges are soiled.
Leak at the system, lines or pump.
Minor grime collection at the pump.
The pump is oily.
Forevacuum pump with insufficient pum-
ping speed or ultimate pressure which is
too high.
Leak at the power cord passage port.
TURBOVAC is rotating in the wrong direc-
tion.
Check the measurement device.
Clean or replace the measurement gauges.
Locate the leaks.
Bake out the pump; see Section 4.6.
Have the pump cleaned (only by the Leybold Service
Department).
Check ultimate pressure of the forevacuum pump or
install a more powerful forevacuum pump.
Locate and repair leaks (only by the Leybold Service
Department).
Check the connector lines; interchange poles if
necessary.
TURBOVAC overheats
(malfunction indication at
the TURBOTRONIK).
Forevacuum pressure too high.
Gas volume too great / leak in the system.
Ventilation unit blocked.
Ambient temperature is too high.
Cooling water is lacking or insufficient.
Bearings are defective.
Check the forevacuum pump; install a more powerful
forevacuum pump if necessary.
Seal leak; install a more powerful forevacuum pump if
necessary.
Ensure sufficient supply of cooling air.
Route cooler air to the fan or employ water
cooling option.
Ensure sufficient supply of cooling water.
Have the pump repaired (only by the Leybold Service
Department).
The TURBOVAC or the
vacuum chamber is con-
taminated with oil.
Anti-suckback valve at the forevacuum
pump is defective.
The TURBOVAC was not vented or impro-
perly vented when shut down.
System configured incorrectly: oil vapor
streams back during forepump operation.
Sorption trap is saturated.
Repair or replace the forevacuum pump.
Check the venting valve and replace if indicated. Vent
the TURBOVAC correctly; see Section 4.5.
Install a roughing line or pre-pump for a shorter period of
time or install a sorption trap.
Regenerate or replace the sorption trap.
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