10 Malfunctions
CAUTION
Danger of burns on hot surfaces
In the event of a fault, the surface temperature of the vacuum pump can increase to above 105 °C.
► Allow the vacuum pump to cool down before carrying out any work.
► Wear personal protective equipment if necessary.
NOTICE
Damage from incorrect maintenance work
Unprofessional work on the vacuum pump will lead to damage for which Pfeiffer Vacuum accepts no
liability.
► Ensure that only the following categories of persons are authorized to perform servicing tasks:
– Pfeiffer Vacuum employees with corresponding qualifications.
– Persons who have undergone training from Pfeiffer Vacuum and have subsequently taken
part in refresher courses at intervals of no more than every two years.
– Persons who have been awarded official certification in accordance with Article 14 (6) Betr-
SichV (Ordinance on Industrial Safety and Health).
► We recommend taking advantage of our service training offering.
Should malfunctions occur, you can find information about potential causes and how to fix them here:
Problem
Possible causes
Remedy
Vacuum pump will not start
up
● No mains voltage or
voltage does not corre-
spond to the motor data
● Check the mains voltage and
mains fuse.
● If necessary, check the motor
switch.
● Pump temperature too
low
● Check the mains voltage and
mains fuse.
● If necessary, check the motor
switch.
● Thermal protection
switch has triggered
● Determine and eliminate the cause.
● Allow the vacuum pump to cool
down as required.
● Pumping system conta-
minated
● Clean the vacuum pump.
● If necessary, contact Pfeiffer Vac-
uum Service.
● Pumping system dam-
aged
● Clean and maintain the vacuum
pump.
● If necessary, contact Pfeiffer Vac-
uum Service.
● Motor faulty
● Replace the motor.
Vacuum pump switches off
after a while after being
started
● Thermal protection
switch of the motor has
triggered
● Determine and eliminate the cause
of overheating.
● Allow the motor to cool down as re-
quired.
● Mains fuse triggered
due to overload (e.g.
cold start)
● Bring vacuum pump to permissible
ambient temperature range.
● Exhaust pressure too
high
● Ensure unobstructed outlet opening
of exhaust line and exhaust side
accessories.
Malfunctions
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