Removing and replacing a power interposer: 2145-SV2 and 2145-SA2

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A faulty power interposer can be removed and replaced with an identical or equivalent replacement part.

About this task

A power interposer forms part of each power supply unit (PSU) slot and fills the space between the PSU and the midplane. It can only be removed after its PSU is removed from the rear of the enclosure. Before you remove or replace a power interposer, review the following guidelines for this procedure:

  • Ensure that you identify the correct PSU and power interposer for removal. If a PSU or a power interposer has a fault that prevents it from powering the node and the functional power supply is removed, the node canisters in the node will shut down.
  • See Procedure: Understanding the system status from the LEDs: 2145-SV2 and 2145-SA2 to determine when it is safe to remove the PSU and power interposer.
  • Do not insert a PSU into the slot while the power interposer is removed.
    Warning: Do not operate the node without a power interposer and PSU in a PSU slot for longer than 5 minutes. Operating for longer than this period might cause the node to shut down due to overheating.
  • No tools are required to complete this task. Do not remove or loosen any screws.

Procedure

  1. Remove the power supply unit, as described in Removing and replacing a power supply unit: 2145-SV2 and 2145-SA2.

Removing the power interposer

  1. Remove the power interposer by  1  pulling on the blue handle that is located beneath the PSU slot, and then  2  sliding the power interposer out until it is clear of the node.
    Figure 1. Removing the power interposer
    Removing a power interposer

Replacing the power interposer

  1. Identify the correct empty power slot where the power interposer is to be installed.
  2. Hold the power interposer so that the connectors are aligned with the PSU slot, as shown in Figure 2 ( 1 ).
  3. Slide the power interposer into the PSU slot until the handle is the only part that is exposed at the rear of the node,  2 ).
    Figure 2. Replacing the power interposer
    Replacing a power interposer
  4. Replace the PSU that was removed in step 1. Follow the procedure that is described in Removing and replacing a power supply unit: 2145-SV2 and 2145-SA2.
  5. Reconnect all cables.