Troubleshooting The Cooling Subsystem - Cisco ASR 1000 Series Installation And Configuration Manual

Appendix B Troubleshooting Initial Startup Problems
Table B-2
Symptom
System powers off,
no STATUS LED,
and no operating
fans.
** Two power supplies must be installed in the chassis at all times to ensure sufficient cooling. The system fans are inside the
Caution

Troubleshooting the Cooling Subsystem

Check the following to help isolate a problem with the cooling subsystem:
Table B-3
Symptom
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.
Multiple fan failure
Red indicates failed fan status
Amber indicates the Cisco ASR 1000 Series
Route Processor 1 status
OL-13208-03
Troubleshooting the Power System (continued)
Possible Cause
Power supply failure.
power supply units and must spin for cooling. Because all the system fans can be powered by one power supply, the second
power supply unit does not have to be powered on, but it must be installed.
If you remove a power supply, the system can run for a maximum of five minutes before the
system shuts down. The fans and power elements are independent within the power supply.
Therefore, it is not required that the replacement power supply be energized within five
minutes. The only requirement is that the power supply be installed in the chassis, which
energizes the fans and maintains proper system cooling.
Troubleshooting the Cooling Subsystem
Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation and Initial Configuration Guide
Possible Solution
If the system is operating with only one
power supply, it powers off after five
minutes. If this occurs, you must remove
all power cables from the power supply
for at least 30 seconds before the power
supply can be powered back up.**
Contact a service representative.
Possible Cause
• 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.
Fan speed dropped below its fan fail
speed
General Troubleshooting Tips
Possible Solution
Contact a service
representative.
Identify and
•
log the failed
fan PEM
location.
Recommend
•
immediate
replacement
of PEM.
B-17