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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.
Required tools
● Torx screwdriver TX 10
● Calibrated torque wrench (tightening factor ≤ 1.6)
1
Fig. 12:
1 Torx screw
2 Electronic drive unit
3 Adapter plate
Required tools
● Torx screwdriver TX 10
● Calibrated torque wrench (tightening factor ≤ 1.6)
Procedure
1. Install the turbopump upright if required.
2. Unscrew all 4 Torx screws from the electronic drive unit.
3. Pull the old electronic drive unit off the turbopump, taking care to keep it straight.
4. Place a new electronic drive unit straight onto the adapter plate connection of the turbopump.
5. Screw the electronic drive unit to the turbopump with all 4 Torx screws.
7.5 Confirming speed specification
The typical nominal rotation speed of a turbopump is preset ex factory in the electronic drive unit. If the
electronic drive unit is replaced or a different pump type is used, the set value settings of the nominal
rotation speed is cleared. The manual confirmation of the nominal rotation speed is part of a redundant
safety system as a measure for preventing excess rotation speed.
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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.
2
Installing and removing the electronic drive unit TC 110
– Tightening torque: 0.8 Nm
3
4
Original protective cover and screw plug
5
Rubber-metal bumper
4
5
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