MAP 5340: Redundant AC power verification

MAP 5340: Redundant AC power verification helps you verify that a redundant AC-power switch is functioning correctly.

Before you begin

If you are not familiar with these maintenance analysis procedures (MAPs), first read Using the maintenance analysis procedures.

You might have been sent here because you have replaced a redundant AC-power switch or corrected the cabling of a redundant AC-power switch. You can also use this MAP if you think a redundant AC-power switch might not be working correctly, because it is connected to nodes that have lost power when only one ac power circuit lost power.

In this MAP, you will be asked to confirm that power is available at the redundant AC-power switch output sockets 1 and 2. If the redundant AC-power switch is connected to nodes that are not powered on, use a voltage meter to confirm that power is available.

If the redundant AC-power switch is powering nodes that are powered on (so the nodes are operational), take some precautions before continuing with these tests. Although you do not have to power off the nodes to conduct the test, the nodes will power off if the redundant AC-power switch is not functioning correctly.

About this task

For each of the powered-on nodes connected to this redundant AC-power switch, perform the following steps:
  1. Use the management GUI or the command-line interface (CLI) to confirm that the other node in the same I/O group as this node is online.
  2. Use the management GUI or the CLI to confirm that all virtual disks connected to this I/O group are online.
  3. Check the redundant AC-power switch output cables to confirm that the redundant AC-power switch is not connected to two nodes in the same I/O group.
If any of these tests fail, correct any failures before continuing with this MAP. If you are performing the verification using powered-on nodes, understand that power is no longer available if the following is true:
  • The on-battery indicator on the 2145 UPS-1U that connects the redundant AC-power switch to the node lights for more than five seconds.
  • The IBM Spectrum Virtualize node display shows Power Failure.

When the instructions say "remove power," you can switch the power off if the sitepower distribution unit has outputs that are individually switched; otherwise, remove the specified redundant AC-power switch power cable from the site power distribution unit's outlet.

Perform the following steps:

Procedure

  1. Are the two site power distribution units providing power to this redundant AC-power switch connected to different power circuits?
    NO
    Correct the problem and then return to this MAP.
    YES
    Go to step 2.
  2. (from step 1)

    Are both of the site power distribution units providing power to this redundant AC-power switch powered?

    NO
    Correct the problem and then return to the start of this MAP.
    YES
    Go to step 3.
  3. (from step 2)

    Are the two cables that are connecting the site power distribution units to the redundant AC-power switch connected?

    NO
    Correct the problem and then return to the start of this MAP.
    YES
    Go to step 4.
  4. (from step 3)

    Is there power at the redundant AC-power switch output socket 2?

    NO
    Go to step 8.
    YES
    Go to step 5.
  5. (from step 4)

    Is there power at the redundant AC-power switch output socket 1?

    NO
    Go to step 8.
    YES
    Go to step 6.
  6. (from step 5)

    Remove power from the Main power cable to the redundant AC-power switch.

    Is there power at the redundant AC-power switch output socket 1?
    NO
    Go to step 8.
    YES
    Go to step 7.
  7. (from step 6)

    Reconnect the Main power cable. Remove power from the Backup power cable to the redundant AC-power switch.

    Is there power at the redundant AC-power switch output socket 1?
    NO
    Go to step 8.
    YES
    Reconnect the Backup power cable. The redundant ac power verification has been successfully completed. Continue with MAP 5700: Repair verification.
  8. (from steps 4, 5, 6, and 7)

    The redundant AC-power switch has not functioned as expected. Replace the redundant AC-power switch assembly. Return to the start of this MAP.

Results