9 Malfunctions
9.1 General
WARNING
Danger to life from the turbopump breaking away in the event of a fault
Sudden blocking of the rotor generates high destructive torques in accordance with ISO 27892. If the
turbopump is
not
properly secured, it will tear off. The energy released in this way can propel the en-
tire turbopump or shattered pieces from its interior through the surrounding area. Potentially danger-
ous gases may escape. There is a risk of serious injury, potentially even fatal, and significant equip-
ment damage.
► Follow the installation instructions for this turbopump.
► Observe the requirements regarding stability and design of the counter flange.
► Use only original accessories or fixing material approved by Pfeiffer Vacuum for the installation.
WARNING
Risk of injury caused by the turbopump breaking away with the vibration compensator in the
event of a malfunction
Sudden jamming of the rotor generates high destructive torques in accordance with ISO 27892.
When using a vibration compensator, this will probably lead to the turbopump being sheared off in
use. The energy that this would release could throw the entire turbopump or shattered pieces from its
interior through the surrounding space. Potentially dangerous gases can escape. There is a risk of
very serious injuries, including death, and extensive property damage.
► Take suitable safety precautions on-site for the compensation of the occurring torques.
► Before installing a vibration compensator, you must first of all contact Pfeiffer Vacuum.
Malfunctions on the pumping station are usually caused by faults on individual components. LEDs on
the turbopump and backing pump indicate the operation statuses for the respective device.
● The DCU display and control unit indicates basic pumping station operating statuses
ter “Operating mode display via LED”, page 35)
● The DCU indicates system malfunctions by outputting an error code to the display.
9.2 Troubleshooting
Problem
Possible causes
Remedy
Pumping station will not
start up. None of the
LEDs on the DCU illumi-
nate.
● Current supply
interrupted
1. Check supply lines to pumping station.
2. Check the 24 V DC output voltage at the “DC
out” connection of the built-in power supply
pack.
3. Check the plug contacts on the power supply
pack.
4. Check connection cable between power sup-
ply pack, backing pump, and turbopump.
● Incorrect oper-
ating voltage
1. Note rating plate specifications.
2. Supply the correct operating voltage.
● No operating
voltage present
1. Connect operating voltage
● Electronic drive
unit defective
1. Replace electronic drive unit according to tur-
bopump operating instructions.
2. Contact Pfeiffer Vacuum Service.
Malfunctions
42/60
