10 Malfunctions
DANGER
Danger to life from electric shock
Touching exposed and voltage-bearing elements causes an electric shock. Improper connection of
the mains supply leads to the risk of touchable live housing parts. There is a risk to life.
► Before the installation, check that the connection leads are voltage-free.
► Make sure that electrical installations are only carried out by qualified electricians.
► Provide adequate grounding for the device.
► After connection work, carry out an earthed conductor check.
WARNING
Danger to life from electric shock in the event of a fault
In the event of a fault, devices connected to the mains may be live. There is a danger to life from
electric shock when making contact with live components.
► Always keep the mains connection freely accessible so you can disconnect it at any time.
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
Danger of property damage from improper maintenance
Unprofessional work on the vacuum pump will lead to damage for which Pfeiffer Vacuum accepts no
liability.
► When ordering spare parts, specify the information on the nameplate.
Problem
Possible causes
Remedy
Vacuum pump will not
start
● No mains voltage or oper-
ating voltage incorrect
● Check the mains voltage.
● Check the mains fuse.
● Check the motor switch.
● Thermal protection switch
has tripped
● Determine the cause and eliminate
the fault.
● Allow the vacuum pump to cool if
needed.
● Suction chamber contami-
nated
● Clean suction chamber.
● Contact Pfeiffer Vacuum Service.
● Motor faulty
● Change the motor.
Vacuum pump
switches off after a
while after being start-
ed
● Thermal protection switch
of the motor has triggered
● Determine the cause of the overheat-
ing and eliminate the fault.
● Allow the motor to cool as necessary.
Malfunctions
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