Cisco Systems CISCO7201 manual Troubleshooting the Cooling Subsystem, Chassis

Chapter 5 Troubleshooting Initial Startup Problems

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		This error message indicates that the system	Contact a service
continue to rotate, and the following error message is		has detected an overtemperature condition or	representative.
displayed:		out-of-tolerance power condition inside the
Queued messages:		chassis.
%ENVM-1-SHUTDOWN: Environmental Monitor		• One or more fans are not operating.
initiated shutdown		• The fans are operating too slowly.
		• The power supply is not operating.
		To determine if the fans are operating, listen
		for them. In noisy environments, place your
		hand on the rear of the chassis to feel if air is
		being forced out the vents.
		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 the following 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 Router,” the “Reporting
		Functions” section on page 3-6for
detected an overtemperature condition or
		descriptions of the show environment and
out-of-tolerance power condition inside the chassis.
		show environment 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 7201 Installation and Configuration Guide
5-6			OL-11364-04