Maintenance 63
Fans
Replacing the power module cooling fans
WARNING! Obey the safety instructions on page 9. If you ignore the
instructions, physical injury or death, or damage to the equipment can
occur.
1. Before you start, stop the inverter and do the steps in Performing electrical work on
page 12.
2. Open the cover plates of the ISU cabinet.
3. Remove the screws that hold the cover plate of the fan unit.
4. Lift the cover plate slightly to release it.
5. Disconnect the fan wiring.
6. Remove the power supply unit below the fan unit.
7. Remove the screws from the fan unit.
8. Pull out the fan unit.
9. Install a new fan unit in reverse order.
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