Tbl. 15: Troubleshooting Turbopumps - Pfeiffer Vacuum HiPace 800 Operating Instructions Manual

Turbopump will not start up;
green LED on the electronic
drive unit is flashing
Turbopump fails to reach the
nominal rotation speed within
the set run-up time
Turbopump not achieving the ul-
timate pressure
Unusual noises during operation
Red LED on the electronic drive
unit illuminates
Tbl. 15:
● For operation without
control unit: Pins 1-3
and 1-14 on the "re-
mote" connection are
not connected
● For operation via
RS-485: The bridge be-
tween pins 1 and 14 in-
hibits control commands
● For operation via
RS-485: Parameters not
set in the electronic
drive unit
● Voltage drop in the ca-
ble is too high
● Fore-vacuum pressure
too high
● Leakage on the turbo-
pump
● Gas throughput too high
● Rotor not running
smoothly, defective
bearing
● Run-up time setpoint ad-
justed too low
Thermal load due to:
● lack of ventilation
● water flow too low
● Fore-vacuum pressure
too high
● ambient temperature too
high
● Turbopump is polluted
● Vacuum chamber, pipes
or turbopump leaking
● Rotor bearing damaged
● Rotor damaged
● Splinter shield or protec-
tive screen loose
● Group error
Troubleshooting turbopumps
● Connect the connections according to the electron-
ic drive unit connection diagram.
● Check the bridges on the connection cable.
● Remove the bridge at the "remote" connection.
● Check the connection cable.
● Set the parameters [P: 010] and [P: 023] via the in-
terface RS-485 to 1 = "ON".
● Check the connection cable.
● Use a suitable connection cable.
● Check backup pump compatibility (see technical
data).
● Check that the backup pump is working.
● Carry out leak detection.
● Check seals and flange connections.
● Eliminate leaks.
● Reduce the process gas load.
● Check the turbopump for noise development
● Contact Pfeiffer Vacuum Service.
● Use a control unit to extend the set value run-up
time [P:700].
● Reduce the thermal load.
─ Ensure adequate air supply.
─ Adjust the cooling water flow.
─ Reduce the fore-vacuum pressure.
─ Adapt the ambient conditions.
● Heat the turbopump if required.
● Have it cleaned.
● Contact Pfeiffer Vacuum Service.
● Carry out leak detection starting from the vacuum
chamber.
● Check seals and flange connections.
● Eliminate leaks in the vacuum system.
● Contact Pfeiffer Vacuum Service.
● Contact Pfeiffer Vacuum Service.
● Check and correct the seat of the splinter shield or
protective screen in the high vacuum flange.
● Follow the installation instructions.
● Reset the malfunction by switching the current sup-
ply off and on.
● Reset the malfunction with V+ on pin 13 on the "re-
mote" connection.
● Set the parameter [P: 009] via the RS-485 interface
to 1 = malfunction acknowledgment.
● Set the parameter [P: 010] via the RS-485 interface
to 0 = off and then 1 = on and malfunction acknowl-
edgment.
● Carry out a differentiated malfunction analysis with
a control unit.
● Contact Pfeiffer Vacuum Service.
Malfunctions
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