Replacing A Failing Power Supply Unit - NEC Express5800/R120g-2M User Manual

Chapter 2 Preparations
1.27.3

Replacing a failing power supply unit

Replace only when the power supply unit fails.
1. Locate the failing power supply unit by the AC POWER LED on the power supply unit. (The LED of the
failing power supply unit is lit amber or blinking amber.)
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.
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.
 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.
Important
To maintain the cooling effect in the server, be sure to install the blank cover in the
vacant slot.
Express5800/R120g-2M User's Guide
1. Installing Internal Optional Devices
CAUTION
1
2
119