Cisco Systems 7500 Series manual Cisco 7513, Cisco 7513-MX, and Cisco 7576 Power Supply LEDs

Chapter 8 Troubleshooting a Cisco 7500 Series Router

Using Cisco 7500 Series System LEDs

R E V I E W D R A F T — C I S CO CO N F I D E N T I A L

In systems with a single DC-input power supply, and in systems with redundant power, when both power supplies are shutting down, the out fail LED goes on momentarily as the system ramps down, but goes out when the power supply has completely shut down. In systems with redundant power where one power supply is still active, the out fail LED on the failed power supply will remain on (powered by the active supply).

The AC-input and DC-input power supplies are self-monitoring. Each supply monitors its own temperature and internal voltages. (For detailed descriptions of the show commands that display temperature and voltage information, see the “Cisco 7507 and Cisco 7507-MX Environmental show Command Examples” section on page 2-29.)

Cisco 7513, Cisco 7513-MX, and Cisco 7576 Power Supply LEDs

There are two types of power supplies for the Cisco 7513, Cisco 7513-MX, and Cisco 7576: AC-input

and DC-input. Each power supply contains the following LEDs: AC (or DC) OK, fan OK, and output fail. Figure 8-11shows the AC-input power LEDs, and Figure 8-12shows the DC-input power LEDs.

Figure 8-11 AC-Input Power Supply LEDs (Cisco 7513, Cisco 7513-MX, and Cisco 7576)

AC	FAN
OK
	OK

OUTPUT

FAIL

LEDs

AC	FAN
OK		OUTPUT
	OK
		FAIL

AC power receptacle

Power supply front panel

Power switch

I

0

H5264

Captive installation screw

The green AC (or DC) OK LED indicates that the power supply is turned on and is receiving input power. The red output fail LED is normally off but goes on if the power supply shuts down for any of the following reasons:

•Power supply DC-output section failure, which could be caused by loss of AC power (input line failure or operator turned off system power) or an actual failure in the power supply

•Power supply shutdown initiated by the power supply because it detected an out-of-tolerance temperature or voltage condition in the power supply

The green fan OK LED is on to indicate the fan in the power supply is operating properly. This LED is useful in noisy environments when you are troubleshooting a potential power supply problem and it is difficult to differentiate the sound of one power supply’s fan from another.

	Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0		8-25