Cisco XR 12406 User Manual
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Cisco XR 12406 Router Installation Guide
OL-13831-01
Chapter 4 Troubleshooting the Installation
Troubleshooting the Cooling Subsystem
•
Listen for the blower fans. In noisy environments, place your hand behind the
blower module to feel for air being forced out the exhaust vents. If the blower
module fans are on, the DC voltage from the power modules to the blower
module is correct.
•
If the blower module fans are not on, there could a problem with either the
blower module or the DC power from the power modules.
–
Check the output power LED on each power module (DC LED on an
AC PEM; OUTPUT OK LED on a DC PEM). If the output power LED
on a power module is off, but the input power LED is on, the power
module is probably faulty and should be replaced.
–
If the output power LED on the power module is on (DC output is OK),
but the blower module remains off, make sure that the blower module is
seated properly in the chassis.
Remove the blower module by loosening the four captive screws holding
it to the chassis, pull the blower module away from the chassis, then
firmly push the blower module against the chassis to reseat the blower
module. Tighten the four captive screws.
•
If the blower module remains off, there could be a problem with the blower
module controller card and the blower module should be replaced.
•
The following console monitor message indicates that the system has
detected an overtemperature or out-of-tolerance power condition in the
router:
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor
initiated shutdown
If an environmental shutdown results from an out-of-tolerance power
condition, the output fail LED on the PEM will light before the system shuts
down. Refer to the
“Troubleshooting the Processor Subsystem” section on
.”
•
Although overheating is unlikely at initial startup, be sure that heated exhaust
air from other equipment is not entering the air filter, and that there is
sufficient clearance (at least 6 inches (15.24 cm)) around the front and rear of
the chassis to allow cooling air to enter and hot air to exhaust.
•
Check the condition of the two air filters located in slots on the right side of
the chassis. If the air filters appear dirty, remove the filters and either vacuum
them or replace them.