Isolating Cooling Subsystem Problems - Cisco XR 12410 Installation Manual

Troubleshooting the Cooling Subsystem

Isolating Cooling Subsystem Problems

Step 1
Step 2
Step 3
Cisco XR 12410 Router Installation Guide
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Use the following procedure to isolate a problem with the chassis cooling system
if you have an overtemperature condition.
Make sure the blower module is operating properly when you power on the
system.
To determine if a blower module is operating, check the two LED indicators
•
on the blower module front panel:
OK (green)—The blower module is functioning properly and receiving
–
–48 VDC power, indicating that the cables from the chassis backplane to
the blower module are good.
Fail (red)—A fault is detected in the blower module. Replace the blower
–
module.
If neither indicator is on and the blower is not operating, there may be a
–
problem with either the blower module or the –48 VDC power supplied
to the blower module. Go to Step 2.
Eject and reseat the blower module making sure the captive screws are securely
tightened.
If the blower module still does not function, go to Step 3.
Check for –48 VDC power by looking at the LED indicators on each power
supply:
If the Pwr OK indicator is on and the Fault indicator is off on each power
•
supply, it indicates that the blower is receiving –48 VDC.
If the blower module is still not functioning, there could be a problem
–
with the blower module controller card or an undetected problem in the
blower module cable. Replace the blower module.
If the new blower module does not function, contact a Cisco customer
–
service representative for assistance.
If the Fault indicator is on, the power supply is faulty. Replace the power
•
supply.
Chapter 4 Troubleshooting the Installation
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