Cisco XR 12406 - Manual (Page 164)

Chapter 4 Troubleshooting the Installation
Troubleshooting the Cooling Subsystem
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Cisco XR 12406 Router Installation Guide
OL-13831-01
• The preceding message could also indicate a faulty component or temperature
sensor. Before the system shuts down, use the show environment all or show
environment table command to display the internal system environment,
including voltages and temperatures measured at each card.
If you are still unable to resolve the problem, contact a service representative for
assistance.