9 Maintenance
9.1 Maintenance safety instructions
The electronic drive unit installed on the magnetically levitated pump is used in the presence of pumped
gases. As a result, the security measures against risks related to this type of application must be ob-
served. Refer to the magnetically levitated pump operating instructions.
WARNING
Risk of cutting injuries due to contact with sharp edges via the high vacuum flange
Sharp components can be accessed via the inlet flange. Rotor and stator blades on turbomolecular
pumps have very sharp edges.
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Before starting any work on the product, wait for the pump to come to a complete standstill.
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Always keep the splinter shield in the inlet housing, as it limits the risk of injury.
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Always wear protective gloves in accordance with standard EN 420.
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Never disconnect the high vacuum flange before the rotor is completely immobilized.
WARNING
Danger of electrocution by contact during maintenance or overhaul
There is an electric shock hazard in case of contact with a product powered on and not electrically
isolated.
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Before carrying out any work, set the main switch to O.
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Disconnect the power cable from the mains.
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Secure the installation correctly by tagging and locking (LO/TO) the system to prevent uninten-
tional re-engagement.
WARNING
Risk of burns in case of contact with hot surfaces
Component temperature remains high, even after the pump has stopped. There is a risk of burns
through contact with hot surfaces, especially at the pump exhaust.
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Wait for the product to fully cool down before working on it.
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Protective gloves must be worn in accordance with standard EN420.
NOTICE
Risk of damaging the pump by generating an electric arc
The pump and its electronic drive unit must not be disconnected from the electrical network before
the rotor completely stops rotating and the unit is isolated from the electrical network: an electric arc
is created when the circuit is interrupted, which damages internal components.
1. Stop the pump from rotating by sending an order to ‘Stop’ on the control interface.
2. Wait for the rotor to completely stop rotating (several minutes).
3. Switch off customer power supply from the equipment.
4. Unplug the mains cable.
General maintenance recommendations
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Ensure that the maintenance technician is trained in the safety regulations that cover the pumped
gases.
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Disconnect the power cable from all sources of power before working on the product.
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Wait 5 minutes after powering off before working on the electrical components.
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Wait for the product to cool down completely before working on it.
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Pressurized circuits – nitrogen and water – pose potential energy risks: always lock out these cir-
cuits using the LO/TO (Lock Out/Tag Out) procedure before working on the product.
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Route and secure cables, hoses and pipework to guard against falls.
Maintenance
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