NEC Express5800/120Rg-2, User Manual, Page: 254 / 338

9-14 Upgrading Your Server
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 lamp on the rear of each power
supply unit. (The lamp 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.
2
1
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 lamp of the new power supply unit
goes on. (If it is replaced while the power is off, the lamp flashes. The
lamp goes on when the power is turned on.)