Cisco Cisco 5760 Wireless LAN Controller 安装指南

 describes the power supply modules status LEDs. 

Observe these guidelines when removing or installing a power supply or fan module:

Do not force the power supply or fan module into the slot. This can damage the pins on the controller 
if they are not aligned with the module.

A power supply that is only partially connected to the controller can disrupt the system operation.

Remove power from the power-supply module before removing or installing the module.

Do not operate the controller with one power-supply module slot empty. For proper chassis cooling, both 
module slots must be populated, with either a power supply or a blank module.

Blank faceplates and cover panels serve three important functions: they prevent exposure to 
hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) 
that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not 
operate the system unless all cards, faceplates, front covers, and rear covers are in place. 
Statement 1029

Release handles

Retainer clips

253564

Off
(AC LED is 
off)

No AC input power.

Off

Output is disabled, or input is 
outside operating range.

Green

AC input power present.

Green

Power output to the controller.

Red

Output has failed.