Removing Electronic Drive Unit; Installing Electronic Drive Unit; Fig. 22: Removal Of Electronic Drive Unit Tc 400 - Pfeiffer Vacuum HiPace 800 Operating Instructions Manual

Maintenance
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 spare part.
Prerequisites
● Turbopump off
● Turbopump cooled
● Vacuum system vented to atmospheric pressure
● Electrical supply disconnected
● All cables disconnected from the electronic drive unit
● All openings sealed with the original protective covers, and any screw plugs.
7.4.1 Removing electronic drive unit
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 spare part.
Required tools
● Allen key, WAF 3
● Calibrated torque wrench (tightening factor ≤ 1.6)
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Fig. 22:
1 Hexagon socket screw
2 Electronic drive unit
3 Adapter plate
Procedure
1. Install the turbopump upright if required.
2. Unscrew all 3 Allen head screws from the electronic drive unit.
3. Pull the old electronic drive unit off the turbopump, taking care to keep it straight.
7.4.2 Installing electronic drive unit
Required tools
● Allen key, WAF 3
● Calibrated torque wrench (tightening factor ≤ 1.6)
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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 an HPU.
2. Load a backup parameter set by means of HPU into the new electronic drive unit.
3. Program the individual settings into the new electronic drive unit by hand.
4. See the operating instructions of the electronic drive unit and the HPU.
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Removal of electronic drive unit TC 400
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High vacuum connection protective cover
Fore-vacuum connection protective cover