Removing and replacing a power supply unit (IBM SSR task)

You can remove and replace either of the two hot-swap redundant power supply units (PSUs) in the enclosure. These redundant power supplies operate in parallel, one continuing to power the enclosure if the other fails.

About this task

Notes:
  • Do not insert a PSU if the PSU slot does not contain a power interposer.
  • Do not operate an enclosure without a power interposer and PSU in a PSU slot for longer than 5 minutes. Operating for longer than this period might cause the enclosure to shut down due to overheating.
  • Remove the replacement PSU from its packaging and have it available before carrying out this procedure.
  • No tools are required to complete this task. Do not remove or loosen any screws.
  • Although many components are hot-swappable, their intended use is only when your system is not active (no I/O operations). If your system is powered on and processing I/O operations, go to the management GUI and follow the fix procedures. Initiating the replacement actions without the assistance of the fix procedures can result in loss of data or loss of access to data.
  • Be careful when you are replacing the hardware components that are located in the back of the system. Do not inadvertently disturb or remove any cables that you are not instructed to remove.
  • Electrostatic discharge precaution symbol When you replace this part, you must follow recommended procedures for handling electrostatic discharge (ESD)-sensitive devices.

Procedure

  1. Identify the location of the control enclosure that requires service. The Event Log contains the enclosure MTM and serial number.
    The power supplies are shown in Locate Power Supply Units
    Figure 1. Locate Power Supply Units
    Locate Power Supply Units
    This figure shows the location of the Power Supply Unit 1  1  and Power Supply Unit 2  2 .
  2. Identify the PSU that requires service; the Event Log contains the ID of the PSU that failed.

Removing the PSU

  1. Release the cable retention clip and disconnect the power cord from the power supply unit that you are replacing.
    This figure shows the location of the cable retention clip  1 , LED indicator  2 , PSU 1 release tab  3 , PSU handle  4 , and the power interposer release tab  5 .
    Figure 2. Features of a power supply unit
    Features of a power supply unit
  2. Fold out the handle so that it extends perpendicular to the PSU.
  3. Hold the PSU handle, and press and hold the PSU release tab. Then, steadily pull the handle horizontally to slide the PSU from the enclosure, as shown in this figure.
    Support the PSU with your other hand as it is released from the enclosure.
    Figure 3. Removing the power supply unit
    Removing the power supply unit
    Important: Insert the replacement PSU within 5 minutes; otherwise, the system may overheat and shut down.

Replacing the PSU

  1. Fold out the handle so that it extends perpendicular to the PSU.
  2. While keeping the PSU handle extended and supporting the PSU slide the power supply into the enclosure until the release tab engages with a click.
  3. Connect the power cord to the power supply and to a properly grounded electrical outlet. Secure the cable with the cable retention clip on the rear of the power supply unit.
    Note: After the power cord is connected to the electrical outlet, make sure that the PSU LED indicator  2  shown in Figure 2, is lit.