5-5
Cisco 7401ASR Installation and Configuration Guide
OL-5419-01 B0
Chapter5 Troubleshooting Problem Solving Using a Subsystems Approach
Troubleshooting the Cooling Subsystem
Check the following to help isolate a problem with the cooling subsystem:
Table5-2 Troubleshooting the Cooling Subsystem
Symptom Possible Cause Possible Solution
System displays the following message:
Router: 00:03:46:%ENVM-3-BLOWER:Fan 2 may have
failed
One or more fans are not operating. Contact a service
representative.
System shuts down, some fans may or may not
continue to rotate, and this error message is
displayed:
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor
initiated shutdown
This error message indicates that the system has
detected an overtemperature condition or
out-of-tolerance power condition inside the chassis.
•One or more fans are not operating.
•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.
Contact a service
representative.
Heated exhaust air from other equipment is
entering the router’s inlet vents. Move other
equipment or the
router to ensure
proper airflow.
System shuts down and this error message
is displayed:
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor
initiated shutdown
This error message indicates that the system has
detected an overtemperature condition or
out-of-tolerance power condition inside the chassis.
Note The system fans may continue to operate
although the system shuts down.
The error message could indicate a faulty
component or temperature sensor. Before the
system shuts down, use the show
environment or show environment table
command to display the internal chassis
environment. See Chapter3, “Starting an d
Configuring,” the “Reporting Functions”
section on page 3-5 for descriptions of the
show environment and show environment
table commands.
Contact a service
representative.
If an environmental shutdown results from an
out-of-tolerance power condition, the system
shuts down.
If the system still fails
to come up when the
power supply is
connected to a
different power
source with a new
power cable, the
power supply is
probably faulty.
Contact a service
representative.