Cisco XR 12410 Installation Manual page 171

Chapter 4 Troubleshooting the Installation
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If the Temp and Fault indicators are on, an overtemperature condition exists.
Verify that the power supply fan is operating properly.
–
– If the fan is not operating, replace the power supply.
Contact your Cisco representative if replacing the power supply does not
fix the problem.
Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
Troubleshooting the Cooling Subsystem
4-41