14
Operation
6.5 Monitoring of the operation conditions
Operating mode dis-
play via LED
LEDs in the front panel of the electronic drive unit show basic operating conditions
of the turbopump. A differentiated malfunction and warning display is possible
only for operation with DCU or HPU.
Temperature monito-
ring
The drive power is reduced in case of impermissible motor temperature or imper-
missibly high housing temperature. This can cause falling below the rotation
speed switchpoint and so result in turning off the turbopump.
6.6 Switching off and venting
Switching off
After the turbopump is switched off, it must be vented to avoid contamination due
to particles streaming back from the fore-vacuum area.
Switching off without the DCU
Switch off the pumping station at the master switch.
Venting (possibilities, see below)
For water cooling: Shut off the water supply.
Switching off with the DCU
Switch off the pumping station via the "ON/OFF" button on the DCU.
Switch off the pumping station at the master switch.
Venting (possibilities, see below)
For water cooling: Shut off the water supply.
LED
Symbol Steady OFF
Flashing
(1/12 s active)
Blinking
(1/2 s active)
Steady ON
Green
insufficient
power supply
Pumping station
"OFF"
Rotation speed
≤
1Hz
Pumping station
"OFF"
Rotation speed > 1 Hz
Pumping sta-
tion "ON"
Yellow
no warning
Warning
Red
no malfunc-
tion
Malfunction
WARNING
Risk of electric shock
The pumping station is only free of voltages when the mains plug has been disconnec-
ted.
Switch off the master switch and disconnect the mains plug before all work.
