MAP
5340: Redundant ac power verification helps you verify that
a redundant ac-power switch is
functioning correctly.
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.
For each of the
powered-on nodes connected to this
redundant ac-power switch,
perform the following steps:
- Use the graphical user interface
(GUI) or the command-line interface (CLI)
to confirm that the other node in the same I/O group as this node
is online.
- Use the GUI or the CLI to confirm that all virtual
disks connected to
this I/O group are online.
- 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 SAN Volume Controller 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:
- 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.
- (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.
- (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.
- (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.
- (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.
- (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.
- (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.
- (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.