NEC R120d-1E N8100-1955F User Manual page 124

Chapter 2 Preparations
1.19.3 Replacing a Failing Power Supply Unit
Replace only when the power supply unit fails. To remove a power supply unit , reverse the installation
procedure above.
1. Locate the failing power supply unit by the AC POWER LED on the rear of each power supply unit. (The
LED of the failing power supply unit is lit amber or blinking amber.)
2. Shutdown the system, and press the POWER switch on the server to turn off the power.
3. Disconnect the AC power cord from the failed 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.Remove the power supply unit from the chassis.
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.
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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 in Precautions for Use.
•
Pay attention to electric hazard.
•
Important
Do not remove a power supply unit operating normally.
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..
Express5800/R120d-1E User's Guide
CAUTION
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1. Installing Internal Optional Devices