Cisco Systems XR 12410 manual Isolating Cooling Subsystem Problems

Chapter 4 Troubleshooting the Installation

Troubleshooting the Cooling Subsystem

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.

	Cisco XR 12410 Router Installation Guide
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