Replace a Power Supply Unit

About this task

The appliance ships with two pre-installed Power Supply Units (PSUs), which you can replace as needed.

Note

Note

The appliance requires one PSU to operate normally. Remove and replace only one power supply at a time in a system that is powered On.
With two Power Supply Units installed, the power load is distributed across both PSUs to maximize efficiency. When you remove one unit with the system powered On, then the remaining unit picks up the power load.
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Redundant Power Supply Units
The power supply unit and the redundant unit are at the rear of the controller. From left to right: 1. AC power supply unit; 2.Handle. 3. Redundant power supply unit.
Table 1. Power Supply Unit Hardware
CalloutDescription
1Handle
2AC power supply unit
3

Latching tab

Procedure

  1. Detach the power supply cord from the PSU.
  2. Grasp the PSU handle and pull.
  3. As you pull the PSU, push the latching tab outward to disengage the PSU.
  4. Insert the new PSU unit into the PSU bay.
  5. Push the new PSU until it locks in place.
    The PSU slides easily into the opening, but there is some resistance about the last 1/2 inch.
  6. Re-connect the power supply cord.
  7. Confirm that the power supply unit LED is green.
    For more information, see Power Supply Unit LED
9038123-00  Rev AA