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Removing a power supply unit
Before removing the power supply unit (PSU), disconnect the power from the PSU by either the mains switch (where present)
or by physically removing the power source in order to ensure your system has warning of imminent power shutdown. Make sure
that you correctly identify the faulty PSU before beginning the procedure.
CAUTION:
Removing a power supply unit significantly disrupts the enclosure's airflow. Do not remove the PSU
until you have received the replacement module. It is important that all slots in the enclosure are filled while it is
in operation.
1. Stop all I/O from hosts to the enclosure.
NOTE:
This step is not required for hot-swapping. However, it is required when replacing both PSUs at once.
2. Use management software to shut down any other system components necessary.
NOTE:
This step is not required for hot-swapping. However, it is required when replacing both PSUs at once.
3. Verify the Power OK LED is lit, then switch off the faulty PSU, and disconnect the power supply cable.
4. If replacing a single PSU via hot-swap, proceed to step 6.
5. If replacing both PSUs, verify that the enclosure was shut down using management interfaces, and that the enclosure is
powered off.
6. Verify that the power cable is disconnected.
7. Push the release latch to the right and hold it in place.
8. With your other hand, grasp the handle and pull the PSU outward.
Figure 63. Removing a PSU
9. While supporting the PSU with both hands, remove it from the enclosure.
10. If replacing both PSUs, repeat steps 5 through 9.
NOTE:
The PSU slot must not be empty for more than 2 minutes while the enclosure is powered.
Installing a power supply unit
If replacing both (power supply units) PSUs, the enclosure must be powered off via an orderly shutdown using the management
interfaces.
1. Make sure power switch on the PSU is in the Off position.
2. Orient the PSU for insertion into the target slot on the enclosure rear panel.
Module removal and replacement
67
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Troubleshooting
