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Troubleshooting
43
GA 05.136/2.02 - 10/98
Malfunction
Converter dead, LED
„mains“ does not light up
after switching on.
Display malfunction, confu-
sing messages. No reaction
when pressing keys.
Vacuum chamber pressure
rises above normal backing
pressure while the pump is
stopped.
Base pressure not reached.
Display blurred.
Measures
Check the line voltage.
Contact Leybold service.
Switch the converter off and on again. If the
converter still malfunctions contact Leybold
service.
Check and replace valve if required.
Leave the pump system run for 3 to 5 hours
to reach a pressure below 10
-5
mbar.
Operate the converter according to the spe-
cifications.
Possible Cause
No power supply.
Fuse F1 blown or converter failure.
Converter failure.
Purge gas or venting valve open or malfunc-
tioning.
Degassing surfaces of rotor and stator. If the
pump was stored in a humid environment or
was exposed to humid ambient air all surfa-
ces will be covered with condensation.
Ambient temperature too high or too low.
6.3 Malfunctions