Malfunctions
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12 Malfunctions
12.1 General
Turbopump and electronic drive unit malfunctions always result in a warning or error
message. In both cases, the electronic drive unit outputs an error code. Operating mes-
sages are generally displayed via the LEDs on the electronic drive unit. If an error occurs,
the turbopump and connected devices will be switched off. The selected venting mode
will be triggered after the preset delay.
12.2 Operation display via LED
The red LED (error status) and green LED (operating status) on the front panel of the
DCU show the following states:
The monochromatic operation display on the front panel of the TCP 1200 shows the op-
eration status of the electronic drive unit.
WARNING
Automatic start-up after power failure or malfunction acknowledgement
The function "pumping station" of the electronic drive unit remains active after power
failure or errors that lead to shut down the pump or the system. The turbopump runs up
automatically after power ist restored or malfunction acknowledgement.
Switch off the function "pumping station" if necessary.
Provide safety measures against interference in the high vacuum flange while the tur-
bopump is running.
LED
Symbol LED status
Display
Meaning
Green
Off
currentless
On, flashing
"Pumping Station OFF", rotation speed
≤
60 min
-1
On, invers flashing
"Pumping Station ON", set rotation speed not at-
tained
On, constantly
"Pumping Station ON", set rotation speed at-
tained
On, blinking
"Pumping Station OFF", rotation speed > 60 min
-1
Red
Off
no malfunction, no warning
On, flashing
Warning
On, constantly
Malfunction
Display
Activity
Meaning
Off
none
– no adequate power supply
Rapid flashing
10 % active, 1 Hz
– no malfunction
– Pumping station "OFF"
– Pump stands still
Flashing
50 % active, 1 Hz
– no malfunction
– Pumping station "ON"
– Pump rotates
Invers rapid flashing
90 % active, 1 Hz
– no malfunction
– Pumping station "ON"
– Set speed not attained
Permanent on
100 % active
– no malfunction
– Pumping station "ON"
– Set speed attained
Flickering
50 % active, 10 Hz
– Malfunction
