User's Guide

1. Installing Internal Optional Devices
Express5800/R120d-1E User’s Guide
104
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.
CAUTION
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.
 To maintain the cooling effect in the server, install the blank cover in the vacant
slot.
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..