Upgrading Your Server 9-13

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 three 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.Check the POWER lamp on the power supply unit and determine which unit needs to be replaced.

The lamp of the failing power supply unit is off.

2.Shutdown the system, and turn off the server.

3.Loosen the captive screw that retains the power supply unit.

4.While pressing down on the locking tab, grasp the handle and carefully pull the power supply unit out of the power supply bay.

IMPORTANT: To avoid damaging the power supply unit, do not tilt or twist the unit as you pull it from the power supply bay. The module disengaging from its connector causes the initial resistance you will feel. Use even, steady force to remove the unit.

Locking tab

Handle

Screw

POWER lamp

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NEC 140Rc-4 manual Replacing a Failing Power Supply Unit