LED
Symbol LED status
Display
Meaning
Red
Off
No error, no warning
On, constant
Error, malfunction
Tbl. 9:
Behavior and meaning of the LEDs on the electronic drive unit
6.4.2 Temperature monitoring
If threshold values are exceeded, output signals from temperature sensors bring the turbopump to a
safe condition. Depending on the type, temperature thresholds for warning and error messages are im-
mutably stored in the electronic drive unit. For information purposes, various status requests are set up
in the parameter set.
● In order to avoid switching off the turbopump, the electronic drive unit already reduces the power
consumption in case of exceeding the warning threshold for excess temperature.
─ Examples are an impermissible motor temperature, or impermissibly high housing tempera-
ture.
● Further reduction of drive power and thus decreasing speed can potentially lead to underrun the
rotation speed switchpoint. The turbopump switches off.
● Exceeding the temperature threshold for error messages switches off the turbopump immediately.
6.5 Switching off and venting
We recommend
Vent the turbopump after shutdown. By doing so, you prevent particles flowing back into
the vacuum system from the fore-vacuum area.
6.5.1 Switching off
NOTICE
Damage to the turbopump and electronic drive unit due to improper disconnection of compo-
nents
Even after the mains power is switched off, the turbopump continues to deliver electrical energy dur-
ing its run-down period. If the turbopump and electronic drive unit are disconnected prematurely,
there is the risk of a short-circuit to ground and consequently the destruction of electronic compo-
nents.
► Never disconnect the turbopump and electronic drive unit from each other if power is still con-
nected or if the rotor is running.
► Monitor the turbopump's rotation speed via the parameters available in the electronic drive unit
(e.g.
[P:398]
).
► Wait until the turbopump comes to a standstill (rotation speed f = 0).
Notes for switching off the turbopump
1. Shut down the turbopump via the control unit or remote control.
2. Close the fore-vacuum line.
3. Switch off the backing pump, if necessary.
4. Vent the turbopump (options see below).
5. Wait until the turbopump comes to a complete standstill.
6. Disconnect the power supply according to the operating instructions for the power supply pack.
Disconnecting from the mains
► Disconnect the power supply pack from the mains to disconnect the current supply completely.
Unplugging the mains plug
Unplugging the mains plug during running operation immediately de-energizes the power
supply pack and the devices that are connected to it.
Operation
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