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Chapter 2 Preparations
Replacing a failing power supply unit
Replace only when the power supply unit fails.
.
Be sure to observe the following precautions to use the server safely. Failure to observe the
precautions may cause burns, injury, and property damage. For details, refer to Safety Precautions
and Regulatory Notices.
Check the power supply unit where the LED (AC power LED) is off.
Power off the server.
Disconnect the AC power cord from the failing power supply unit.
Push the lever of the failing power supply unit toward inside, and pull the power supply unit while
holding the handle.
If operating the server with a single power supply unit without installing a new one, install the blank
cover you removed in step 2 of installation procedure.
Install the new power supply unit taking steps 3 to 6 of "Installation", and confirm that the power
supply unit is installed normally.
196
Pay attention to electric hazard.
Do not remove a power supply unit operating normally.
Important
The blank cover installation is essential for maintaining the cooling effect.
Tips
In the redundant power configuration (with two power supply units) and if either
one of power supply units fails, the failing power supply unit can be replaced with
the system power on.
Important
To maintain the cooling effect in the server, be sure to install the blank
cover in the vacant slot.
Express5800/R120h-2M (3rd-Gen) User's Guide
CAUTION
1. Installing Internal Optional Devices
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