1. Properly ground yourself.
2. Unpack the new power supply and set it on a level surface near the shelf.
Save all packing materials for use when returning the failed power supply.
3. Physically identify the failed power supply from the system console warning message and the illuminated
attention (amber) LED on the power supply.
4. Turn off the failed power supply and disconnect the power cable:
a. Turn off the power switch on the power supply.
b. Open the power cord retainer and unplug the power cord from the power supply.
c. Unplug the power cord from the power source.
5. Press the orange latch on the power supply cam handle until it releases, and then open the cam handle to
fully release the power supply from the mid plane.
The following illustration is for a power supply used in a DS224C or DS212C disk shelf; however, the latch
operates the same way for power supplies used in DS460C disk shelves.
6. Use the cam handle to slide the power supply out of the disk shelf.
If you have a DS224C or DS212C disk shelf, as you remove the power supply, a flap swings into place to
block the empty bay, helping to maintain air flow and cooling.
When handling a power supply, always use two hands to support its weight.
7. Make sure that the on/off switch of the new power supply is in the Off position.
8. Using two hands, with the cam handle of the new power supply in the open position, support and align the
edges of the new power supply with the opening in the disk shelf, and then firmly push the new power
supply until it meets the mid plane.
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