Power Supply Unit; Replacing Failed Redundant Power Supply Unit - NEC Express5800 Series User Manual

Chapter 2 Preparations
1.14

Power Supply Unit

Models N8100-2477F, N8100-2478F and N8100-2279F are hot-plug redundant power supply units.
The redundant power system can be configured with two redundant power units.
In redundant power system, the server can continue operation even one of the power supply unit fails.

1.14.1 Replacing failed redundant power supply unit

Replace the power supply unit only when redundant power supply unit fails.
(1)
Replacing power supply unit
1. Check the failed power supply unit on which AC POWER LED is lit amber or flashing amber.
2. Disconnect the power cord from the failed power supply unit found in Step 1.
3. Push the lever of power supply unit toward inside, and pull the unit while holding the handle.
4. Install the new power supply unit. Make sure that no error is indicated on STATUS LED or POST screen.
If any error messages are displayed, see Chapter 3 (1. POST Error Message) in "Maintenance Guide". If
AC POWER LED is not lit, re-install the power supply unit. If the same error occurs, contact your sales
representative. Be sure to install the module for replacement.
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, see Safety Precautions and Regulatory Notices.

Pay attention to electric hazard.

Do not remove the power supply module that is working normally.
Important

Do not use the server with failed power supply module removed. Power
supply module must be removed only when it is replaced.
If the system is running with two power supply units, the failed power supply unit
Tips
can be replaced with the system power on.
Important
The failed power supply unit must be replaced. The system cannot run with a
single power supply module.
Express5800/T120g User's Guide
1. Installing Internal Optional Devices
CAUTION
99