Cisco Systems 7200 VXR Troubleshooting the Cooling Subsystem, Fiber-Optic Cleaning Information

Chapter 5 Troubleshooting the Installation

Troubleshooting the Cooling Subsystem

–If the ENABLED LED on an individual adapter is off, suspect that the adapter has pulled away from the midplane. Reseat the adapter in its slot (you do not have to turn off the system power when removing or replacing port and service adapters). After the system reinitializes the interfaces, the ENABLED LED on the adapter should go on.

–If the ENABLED LED remains off, the system detected a processor hardware failure. (This LED should be on in normal operation.) Contact a service representative for instructions.

Troubleshooting the Cooling Subsystem

Check the following to help isolate a problem with the cooling system:

•When you start up the system, do the fans start operating?

To determine if the fans are operating, listen for them. In noisy environments, place your hand on the left side of the chassis (when viewing the chassis from the front) to feel for air being forced out the vents.

–If yes, the power to the fan tray is good.

–If no, there is a problem with the fan tray or power. See the “Troubleshooting the Power Subsystem” section on page 5-6.

•The following message, if displayed, indicates that the system has detected an overtemperature condition or out-of-tolerance power condition inside the chassis.

Queued messages:

%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown

If an environmental shutdown results from an out-of-tolerance power condition, the PWR OK LED goes off, and the system shuts down. (See the “Troubleshooting the Power Subsystem” section on page 5-6.) Although an overtemperature condition is unlikely at initial startup, ensure that heated exhaust air from other equipment is not entering the router’s inlet vent, and that there is sufficient clearance around the sides of the chassis to allow cooling air to flow. See Chapter 2, “Preparing for Installation,” the “Site Requirement Guidelines” section on page 2-3for preventive site configurations.

The above message could also indicate a faulty component or temperature sensor. Before the system shuts down, use the show environment or show environment table command to display the internal chassis environment. (See Chapter 1, “Cisco 7200 VXR Product Overview,” the “Functional Overview” section on page 1-53, for descriptions of the show environment and show environment table commands.)

If you experience trouble with the startup that is not resolved with these procedures, contact a service representative for assistance and further instructions.

Fiber-Optic Cleaning Information

We strongly recommend cleaning all optical connections before reconnecting any optical cables to equipment. For information about cleaning optical connectors, see the Inspection and Cleaning Procedures for Fiber-Optic Connections document and the Compressed Air Cleaning Issues for Fiber-Optic Connections document.

Cisco 7200 VXR Installation and Configuration Guide

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