Cisco XR 12410 - Manual (Page 170)

Chapter 4 Troubleshooting the Installation
Troubleshooting the Cooling Subsystem
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Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
OL-17441-01
Isolating Cooling Subsystem Problems
Use the following procedure to isolate a problem with the chassis cooling system
if you have an overtemperature condition.
Step 1 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.
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.
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.