Installing or replacing a power supply

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Use the following procedures to replace either of the redundant power supplies in the 5U expansion enclosure. The redundant power supplies operate in parallel; one continues to provide power to the enclosure if the other fails.

Before you begin

Important: You can replace a PSU without powering off the expansion enclosure. However, to maintain operating temperature, replace the PSU within 10 minutes of its removal. When a PSU is removed, the reduction in airflow through the enclosure might cause the enclosure or its components to shut down to protect from overheating.

About this task

This task assumes that the following conditions are met:
  • You removed the PSU, following the procedure described in Removing a power supply.
  • You removed the fascia that covers the PSU from the front of the expansion enclosure, as described in Removing the fascia.
  • You are aware of the procedures for handling static-sensitive devices.

Procedure

  1. Read all safety information.
  2. Rotate the handles on the PSU outward, as shown in Figure 1.
    Figure 1. Preparing to install the power supply
    Preparing to install the power supply
  3. Slide the PSU forward into the chassis until it clicks in to place, as shown in Figure 2.
    Figure 2. Install the power supply
    Install the power supply
  4. Close the handles on the PSU and ensure the handle lock clicks in to place.
  5. Verify that the AC input and the DC power indicators are lit on the front of the PSU, as shown in Figure 3.
    Figure 3. Power supply indicators
    Power supply indicators

    For more information about the power supply indicators, see 5U expansion enclosure LEDs and indicators.