7.4 Replace electronic drive unit
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).
NOTICE
Property damage from electrostatic discharge
Neglecting the electrostatic hazard for electronic components results in their damage or destruction
► Implement ESD safety measures at the workstation.
► Observe EN 61340 "Protection of electronic devices from electrostatic phenomena".
Backing up settings made by the customer
The factory operating parameters are always preset in replacement units. All settings made
by the customer to the original electronic drive unit are lost when it is replaced. To preserve
your custom settings, you have the following options:
1. Back up all your settings as a parameter set in a HPU.
2. Load a backup parameter set by means of a HPU into the new electronic drive unit.
3. Program the individual settings into the new electronic drive unit by hand.
4. Observe the operating instructions of the electronic drive unit and the HPU.
The electronic drive unit of the turbopump cannot be repaired. In the event of a defect, replace the en-
tire electronic drive unit with a replacement part.
Prerequisites
● Turbopump off
● Vacuum system vented to atmospheric pressure
● Electrical supply disconnected
● All cables disconnected
● All openings sealed with the original protective covers and any plugs
Required tools
● Torx screwdriver TX 10
● Calibrated torque wrench (tightening factor ≤ 1.6)
Maintenance
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