Cisco 8540 - Catalyst Campus Switch Router Modular Expansion Base Installation Manual page 37

Chapter 2 Installing the Chassis
Table 2-1 describes the LEDs.
Table 2-1
LED
Input OK
Fan OK
Output Fail
78-6134-03
LED Descriptions
State Description
Green Power supply is on and receiving source power.
Off Failure.
Green Fan assembly is operating properly.
Off Failure.
Red Output voltage is outside of proper range,
+3.3, +5, +12, and +42 VDC.
Off Output voltage is in proper range.
Connecting Power to the Chassis
Catalyst 8540 Chassis Installation Guide
2-13