Operation Display Via Led; Switching Off And Venting; Switching Off; Venting - Pfeiffer Vacuum HIPACE 800 Operating Instructions Manual

6.4.2

Operation display via LED

6.5

Switching off and venting

6.5.1

Switching off

6.5.2

Venting

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 opera-
tion with DCU or HPU.
LED Symbol LED status
Green Off
On, flashing
On, invers flashing
On, constantly
On, blinking
Yellow Off
On, constantly
Red Off
On, constantly
Fig. 12: Behaviour and meaning of LEDs on the electronic drive unit
After the turbopump is switched off, it must be vented to avoid contamination due to par-
ticles streaming back from the fore-vacuum area.
 Close the fore-vacuum: Switch off the backing pump or close a fore-vacuum valve.
 Switch off the turbopump on the control unit or via remote control.
 Venting (possibilities see below)
 For water cooling: Shut off the water supply.
Manually venting
 Open the venting screw (included) in the venting connection of the turbopump about
one turn.
Venting with Pfeiffer Vacuum Venting Valve
 Enable venting via the functions of the electronic drive unit.
 Settings are possible via interface RS-485 by using DCU, HPU or PC.
Venting rotation speed
50 % of the nominal rotation
speed
1)
When mains power is restored the venting procedure is aborted.
Basic information for the rapid venting
Venting of the vacuum chamber in two steps. Ask for details on individual solutions from
Pfeiffer Vacuum.
 Vent for 20 seconds at a rate of pressure rise of max. 15 hPa/s.
– The valve cross section for the venting rate of 15 hPa/s must be adapted to the size
of the vacuum chamber.
– For small vacuum chambers, use the Pfeiffer Vacuum venting valve.
 Then vent with an additional venting valve of any desired size.
Display Meaning
currentless
"Pumping Station OFF", rotation speed ≤ 60 min
"Pumping Station ON", set rotation speed not at-
tained
"Pumping Station ON", set rotation speed attained
"Pumping Station OFF", rotation speed > 60 min
no warning
Warning
no malfunction
Malfunction
Switch off the pumping station
Venting valve opens for 3600 s (1 h,
works setting)
Operation
-1
-1
1)
Mains power failure
Venting valve opens for
3600 s (1 h, works setting)
29