NEC Express5800 140Rd-4 User Manual page 259

Replacing a Failing Power Supply Unit
R eplace only a failing power supply unit.
IMPORTANT:
NOT E:
If two power supply units work normally while the server contains three or four 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 th e 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.
Wh ile pressing down on the locking tab, grasp the handle and ca
sup ply bay.
IMPORTANT:
the unit as you pull it from the power supply bay. Use even, steady force to remove the unit.
4.
If you are not going to install a replacement power supply unit, you must
of installation procedure to vacant slot.
IMPORTANT:
slot of the power supply bay.
5.
Install the new power supply unit taking steps 3 to 6 of "Installation", and con
installed normally.
NOTE:
If one of the three or four 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, th e lamp goes on after the
Do not remove a pow er supply unit operating normally.
To avoid damaging the power supply un
To maintain the cooling effect in the server, install
power is turned on.)
refully pull the power supply unit out of the power
it and/or connector, do not tilt or twist
install a blank cover you removed in step 2
the blank cover in the vacant
firm that the power supply unit is
9-11