Removing a PSU module

Edit online

About this task

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 CRU slots are filled when the enclosure is in operation.

Before removing the PSU, disconnect the power from the PSU by physically removing the power source in order to ensure your system has warning of imminent power shutdown. A faulty PSU must be replaced by a fully operational PSU as soon as possible. Ensure that you correctly identify the faulty PSU before beginning the step procedure.

Procedure

  1. Stop all I/O from hosts to the enclosure. See also the Stopping I/O section.
    Tip: This step is not required for hot-swapping. However, it is required when replacing both PSUs at once.
  2. Disconnect the power cable from the PSU power connector to power off the faulty PSU (it has no power switch).
    Note:

    Power cables are typically routed to the PSU from the cable management arm (CMA). Verify that the 180º power cable bends lie flat in the CMA baskets. Ensure that the cable lays flat on the CMA shelf and through the cable clip assembly. See also Figure 1 and Step 3 of Routing cables using the CMA.

  3. If replacing a single PSU via hot-swap, proceed to Step 5.
  4. If replacing both PSUs, verify that the enclosure was shut down using management interfaces, and that the enclosure is powered off.
  5. Verify that the power cord is disconnected.
  6. Grasp the PSU handle latch between the thumb and forefinger and press the latch tab down to unlock the handle. Revolve the handle out and downward to lever the PSU out of the enclosure as shown in the figure below.
    Figure 1. Removing a PSU (1 of 2)
    Remove PSU fig 1 of 2
  7. Grip the handle and withdraw the PSU, taking care to support the base of the module with both hands as you remove it from the enclosure as shown in the figure below.
    Figure 2. Removing a PSU (2 of 2)
    Remove PSU fig 2 of 2
    Note: The remove PSU illustrations show a module with a single power connection. The procedure applies equally to single cord and dual cord PSU modules used in 4U enclosures.
  8. If replacing two PSUs, repeat Step 5 through Step 8, being mindful of the Enclosure rear panel illustrations TIP.