Appendix B Troubleshooting Initial Startup Problems
General Troubleshooting Tips
Table | Troubleshooting the Power System (continued) | ||
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Symptom |
| Possible Cause | Possible Solution |
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System powers off, | Power supply failure. | If the system is operating with only one | |
no STATUS LED, |
| power supply, it powers off after five | |
and no operating |
| minutes. If this occurs, you must remove | |
fans. |
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| all power cables from the power supply |
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| for at least 30 seconds before the power |
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| supply can be powered back up.** |
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| Contact a service representative. |
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**Two power supplies must be installed in the chassis at all times to ensure sufficient cooling. The system fans are inside the power supply units and must spin for cooling. Because all the system fans can be powered by one power supply, the second power supply unit does not have to be powered on, but it must be installed.
Caution If you remove a power supply, the system can run for a maximum of five minutes before the system shuts down. The fans and power elements are independent within the power supply. Therefore, it is not required that the replacement power supply be energized within five minutes. The only requirement is that the power supply be installed in the chassis, which energizes the fans and maintains proper system cooling.
Troubleshooting the Cooling Subsystem
Check the following to help isolate a problem with the cooling subsystem:
Table | Troubleshooting the Cooling Subsystem |
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Symptom |
| Possible Cause | Possible Solution | |
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System shuts down, some fans may or may | • One or more fans are not | Contact a service | ||
not continue to rotate, and this error | operating. | representative. | ||
message is displayed: | • The fans are operating too |
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Queued messages: | slowly. |
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• The power supply is not |
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Monitor initiated shutdown |
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| operating. |
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This error message indicates that the system | To determine if the fans are |
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has detected an overtemperature condition | operating, listen for them. In noisy |
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or |
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environments, place your hand on the |
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the chassis. |
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| rear of the chassis to feel if air is |
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| being forced out the vents. |
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Multiple fan failure | Fan speed dropped below its fan fail | • | Identify and | |
Red indicates failed fan status | speed |
| log the failed | |
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| fan PEM | ||
Amber indicates the Cisco ASR 1000 Series |
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| location. | ||
Route Processor 1 status |
| • | Recommend | |
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| immediate |
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| replacement |
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| of PEM. |
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| Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation and Initial Configuration Guide |
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