12 Malfunctions
12.1 General
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.
No automatic restart following a power failure or error state
After restoring the power supply, the vacuum pump remains in the "Switched Off" state.
● Switch the vacuum pump on actively.
Vacuum pump and electronic drive unit malfunctions always result in a warning or error message. In
both cases, you will receive an error code that you can read out via the interfaces of the electronic drive
unit. Generally, the LEDs on the control panel display the operating messages. If an error occurs, switch
off the vacuum pump and connected devices.
12.2 Troubleshooting
Should malfunctions occur, you can find information about potential causes and how to fix them here:
Problem
Possible causes
Remedy
The vacuum pump does not start up, no
LED lights up on the operator panel of the
electronic drive unit
● No mains voltage or op-
erating voltage incorrect
● Check the mains voltage.
● Check the mains fuse.
● Electronic drive unit de-
fective
● Contact Pfeiffer Vacuum Service.
● Suction chamber dirty
● Switch off the vacuum pump immediate-
ly.
● Clean suction chamber.
● If necessary, contact Pfeiffer Vacuum
Service.
Vacuum pump switches off after a while
after being started
● Thermal protection
switch of the motor or the
vacuum pump has trig-
gered
● Determine the cause and eliminate the
fault.
● Allow the vacuum pump or the motor to
cool as necessary.
Vacuum pump/pumping station does not
reach ultimate pressure
● Backing pump faulty
● Check the backing pump.
● Leak in system
● Examine the system for leaks and, if
necessary, carry out a leak test.
● Eliminate leaks.
Malfunctions
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