Upgrading Your Server 9-15

Replacing a Failing Power Supply Unit

Replace only a failing power supply unit.

IMPORTANT: Do not remove a power supply unit operating normally.

NOTE: If one power supply unit fails while the server contains two power supply units in a redundant configuration, the failing power supply unit can be replaced with the system operating (power-on state). (Skip step 2.)

1.Locate the failing power supply unit by the AC POWER LED on the rear of each power supply unit. (The LED of the failing power supply unit is amber.)

2.Shutdown the system, and press the POWER switch to turn off the power.

3.Disconnect the power cord from the failed power supply.

4.Hold the handle of the failing power supply.

5.While pressing the lever, pull the power supply to remove if from the chassis.

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6.If operating the server with a single power supply unit without installing a new one, install the cover you removed in step 3 of installation procedure.

IMPORTANT: To maintain the cooling effect in the server, install the blank cover in the vacant slot.

7.Install the new power supply unit taking steps 4 to 8 of "Installation", and confirm that the power supply unit is installed normally.

NOTE: If one of the two power supply units of the server is replaced while the power is on, the POWER LED of the new power supply unit goes on. (If it is replaced while the power is off, the LED flashes. The LED goes on when the power is turned on.)