Cisco Systems 7401ASR Troubleshooting the Cooling Subsystem, System shuts down, use the show

Chapter 5 Troubleshooting

Problem Solving Using a Subsystems Approach

Troubleshooting the Cooling Subsystem

Check the following to help isolate a problem with the cooling subsystem:

Table 5-2 Troubleshooting the Cooling Subsystem

Symptom	Possible Cause	Possible Solution
System displays the following message:	One or more fans are not operating.	Contact a service
Router: 00:03:46:%ENVM-3-BLOWER:Fan 2 may have		representative.
failed
System shuts down, some fans may or may not	• One or more fans are not operating.	Contact a service
continue to rotate, and this error message is	• The fans are operating too slowly.	representative.
displayed:
	• The power supply is not operating.
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor	To determine if the fans are operating, listen
initiated shutdown	for them. In noisy environments, place your
This error message indicates that the system has	hand on the rear of the chassis to feel if air is
	being forced out the vents.
detected an overtemperature condition or
out-of-tolerance power condition inside the chassis.
	Heated exhaust air from other equipment is	Move other
	entering the router’s inlet vents.	equipment or the
		router to ensure
		proper airflow.
System shuts down and this error message	The error message could indicate a faulty	Contact a service
is displayed:	component or temperature sensor. Before the	representative.
Queued messages:	system shuts down, use the show
	environment or show environment table
%ENVM-1-SHUTDOWN: Environmental Monitor
initiated shutdown	command to display the internal chassis
	environment. See Chapter 3, “Starting and
This error message indicates that the system has	Configuring,” the “Reporting Functions”
	section on page 3-5for descriptions of the
detected an overtemperature condition or
	show environment and show environment
out-of-tolerance power condition inside the chassis.
	table commands.
Note The system fans may continue to operate
although the system shuts down.
	If an environmental shutdown results from an	If the system still fails
	out-of-tolerance power condition, the system	to come up when the
	shuts down.	power supply is
		connected to a
		different power
		source with a new
		power cable, the
		power supply is
		probably faulty.
		Contact a service
		representative.

Cisco 7401ASR Installation and Configuration Guide

OL-5419-01 B0 5-5