11 Malfunctions
CAUTION
Danger of injury from moving parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. There
is a risk of injury to fingers and hands if they enter the operating range of rotating parts.
► Safely disconnect motor from the mains.
► Secure the motor against reactivation.
► Dismantle the vacuum pump for inspection, away from the system if necessary.
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.
► We recommend taking advantage of our service training offering.
► When ordering spare parts, specify the information on the nameplate.
The vacuum pump indicates errors in two ways:
● LED A1 lights up red
● No ready for operation signal is given at the control input with existing connection
The electronic drive unit makes 6 attempts at 20-second intervals to automatically reset the error.
Reset error
1. Determine the potential cause of the error.
2. Eliminate the error.
3. Interrupt the current supply for at least 30 seconds.
– This resets the error.
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 volt-
age does not correspond
to the drive data
● Check the mains voltage and
mains fuse
● No start signal
● Check the control input.
● Internal fuse is faulty
● Check the fuse in the drive (10
A TT) and replace if necessary.
● Pump temperature too
low
● Heat the vacuum pump to
> 12 °C.
● Drive coupling is defec-
tive
● Replace the coupling parts.
● Pumping system conta-
minated
● Clean the vacuum pump.
● Contact
.
● Pumping system dam-
aged
● Clean and maintain the vacuum
pump.
● Contact
.
● Motor or drive defective
● Contact
.
Malfunctions
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