Model LRA2900A RAS Getting Started Guide | 5 • Troubleshooting and maintenance |
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Fault analysis
The following procedures outline steps you should follow when troubleshooting a RAS malfunction.
1.If possible, talk to the person who filed the trouble complaint and determine the operational symptoms. Record the symptoms on the appropriate trouble report form (include the front panel LED indications).
2.Refer to table 5 for LED definitions and compare the recorded results from the trouble report against those in the table, then refer to the section recommended in the table for the maintenance procedure that will repair the malfunction.
Table 5. LED definitions
LED | Location | Color | Status | Meaning |
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POWER | Front panel | Green | On solid | Power is being applied. No action recom- |
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| mended. |
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| Flashing | A power supply has failed. One of the power supplies |
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| has malfunctioned. The RAS will function normally indefi- |
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| nitely with one power supply, so you can wait until a low |
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| traffic time, then refer to “Replacing the RAS” on |
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| page 58 to replace the RAS. |
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| Off | No input power is being applied. Verify that |
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| power is being supplied to the RAS. |
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CPU FAIL | Front panel | Red | On solid | The CPU has failed. As soon as possible, unplug both |
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| power cables from the RAS, wait 30 seconds, then plug |
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| the cables back into the RAS to see if the problem disap- |
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| pears. If the CPU FAIL LED is still lit after the RAS com- |
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| pletes the |
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| on page 58 to replace the RAS. |
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| Off | The CPU is operating normally. No action recom- |
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| mended. |
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ALARM | Front panel | Red | On solid | A minor alarm condition has been detected. |
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| Flashing | A major alarm condition has been detected. |
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| Off | The RAS is operating normally. No action rec- |
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| ommended. |
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SYSTEM | Front panel | Green | Flashing | The RAS is operating normally. No action rec- |
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| ommended. |
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| Off | The RAS has malfunctioned. The RAS is not functioning |
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| properly. As soon as possible, unplug both power cables |
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| from the RAS, wait 30 seconds, then plug the cables |
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| back into the RAS to see if the problem disappears. If the |
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| SYSTEM LED is still lit after the RAS completes the power- |
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| up cycle, refer to “Replacing the RAS” on page 58 to |
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| replace the RAS. |
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Fault analysis | 56 |
