Cisco 12410 Installation And Configuration Manual page 265

Chapter 5 Troubleshooting the Installation
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Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
OL-11496-01
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.
Troubleshooting the Cooling Subsystem
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