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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.
1.
Check the power supply unit whose LED indication (AC POWER LED) is off.
2.
Power off the server.
3.
Disconnect the AC power cord from the failing power supply unit.
4.
Push the lever of the failing power supply unit toward inside, and pull the power supply unit while holding
the handle.
5.
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.
6.
Install the new power supply unit taking steps 3 to 6 of "Installation", and confirm that the power supply unit
is installed normally.
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CAUTION
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-1M User's Guide
1. Installing Internal Optional Devices
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