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1. Follow the appropriate steps to prepare for a service action included in
2. Identify the PM requiring replacement. Make note of the following:
3. Unplug the power cord from the PSU jack on the rear of the enclosure—
Figure 8.19 PSU jacks
4. Press the PM release tab toward the finger handle while simultaneously
| 108 |
ESD-SENSITIVE DEVICE. Only install the device on a properly grounded electrostatic
discharge (ESD) protection surface to avoid damage to the components. Always utilize
a properly grounded ESD wrist strap or mat during operation or installation of the
device, or when connecting the cables.
WARNING: While some factory-approved maintenance on FRUs (e.g. hot-swapping a
power supply, fan, NVMe drive, or server module) does not require the user to
disconnect power to the system, performing other types of maintenance on systems
connected to an electrical power supply may result in serious injury or death. Only
individuals with knowledge and training in working with devices containing live circuits
should operate the system. Take precautions when performing all other types of
maintenance. Disconnect 2 power supply cords before servicing.
NOTE: The maximum current draw is listed on each PSU label. For example, if the
maximum input for one 1600W PSU is 200–240V ~15A max, this rating is for one PM
and there are two PMs per enclosure sharing the load.
the section "Releasing the CMA" on page 98.
a. If both PMs require replacement and the second PM is operational,
follow steps 3 through 10 to replace the first PM, and then repeat
these steps to replace the second PM. Shutdown is not required.
b. If both PMs have faulted, follow proper shutdown procedures (if
possible) prior to commencing with PM replacement.
Refer to Chapter 7 titled "Monitoring the VSS2249RQ Storage Server" that begins
on page 77 for information on identifying the PM requiring replacement.
two power cords if replacing both PSUs simultaneously. Refer to Figure
8.19 for the location of the jacks.
pulling the finger handle outward to disengage the PM cam. Figure 8.20
on page 109 identifies the release tab and finger handle. Do NOT push
the PSU tab.
Chapter 8: System Maintenance
CTC-DOC-002293, Rev A.2
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