Replacing a 7x20 Power Supply
Storage controllers are equipped with redundant hot-swappable power supplies. If a power supply fails and you do not have a replacement, leave the failed power supply installed to ensure proper air flow. A faulted power supply is indicated by an amber-colored status LED. Use the following procedure to replace a 7x20 power supply.
- Gain access to the rear of the storage controller where the faulted power supply is located.
-
If a cable management arm (CMA) is installed, press and hold the CMA
release tab and rotate the arm out of the way.
- Disconnect the power cord from the faulted power supply.
-
Shut down the controller using one of the power-off methods described in
Powering Off the Controller.
7120 or 7320: Release the latch, then remove the power supply. Components may differ slightly between the 7120 and 7320, however service procedures for each are identical. The illustration shows the 7320 controller.
7420: Grasp the power supply handle and press the release latch to remove the power supply.
- Align the replacement power supply with the empty power supply chassis bay.
-
Slide the power supply into the bay until it is fully seated. The
following figure shows the 7420 power supply.
- Connect the power cord to the power supply.
- Verify that the green AC Present status indicator is lit.
- Close the CMA, inserting the CMA into the rear left rail bracket.
-
Go to the Maintenance > Hardware screen of the BUI. Click the
right-arrow icon
for the controller and then click PSU to verify that
the online icon 
is green for the newly installed power supply.
- If a fault does not self-clear, see Repairing Active Problems.