Removing and replacing a power supply

Edit online

You can remove either of the redundant power supply units in a 5U expansion enclosure. Redundant power supplies operate in parallel; one continues to provide power to the enclosure if the other fails.

Before you begin

Important: You can remove a PSU without powering off the expansion enclosure. However, to maintain operating temperature, ensure that you perform the following tasks.
  • Do not remove a faulty PSU until its replacement is ready to be installed.
  • Do not remove a PSU from an operational enclosure for more than approximately 10 minutes. The reduction in airflow through the enclosure might cause the enclosure or its components to shut down to protect from overheating.

About this task

Each PSU provides cooling to the lower part of the enclosure. Ensure that the second PSU in the enclosure is powered on and operating correctly. For example, in Figure 1, PSU 1 is operating while PSU 2 is being removed.

Review and follow the procedures for handling static-sensitive devices before you remove the power supply unit (PSU).

Procedure

  1. Read all safety information.
  2. Remove the 1U fascia that covers the PSUs on the front of the expansion enclosure, as described in Removing and replacing the fascia.
  3. Press on the handle lock to release the handles on the PSU.
  4. Rotate the handles outward, as shown in Figure 1.
    Figure 1. Releasing the power supply handles
    Releasing the power supply handles
  5. Carefully pull the PSU out of the expansion enclosure chassis and place it in a safe location, as shown in Figure 2.
    Figure 2. Removed power supply
    Removed power supply
  6. If you are instructed to return the power supply, follow all packaging instructions. Use any packaging materials for shipping that are supplied to you.

Replace the power supply

  1. Read all safety information.
  2. Rotate the handles on the PSU outward, as shown in Figure 3.
    Figure 3. 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 4.
    Figure 4. 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 5.
    Figure 5. Power supply indicators
    Power supply indicators

    For more information about the power supply indicators, see High density expansion enclosure LEDs and indicators.