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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter 2 Alarm Troubleshooting
Alarm Procedures
Procedure: Clear the FAN Alarm
Step 1 Verify whether the air filter needs replacement. Complete the “Inspect, Clean, and Replace the Reusable
Air Filter” procedure on page 3-3.
Step 2 If the filter is clean, complete the “Remove and Reinsert Fan-Tray Assembly” procedure on page 2-130.
Note The fan-tray assembly should run immediately when correctly inserted.
Step 3 If the fan does not run or the alarm persists, complete the “Replace the Fan-Tray Assembly” procedure
on page 3-1.
Step 4 If the replacement fan-tray assembly does not operate correctly, log onto http://www.cisco.com/tac for
more information or call TAC to report a service-affecting problem (1-800-553-2447).
2.6.63 FANDEGRADE
• Major (MJ), Non-Service Affecting (NSA)
The Partial Fan Failure Speed Control Degradation (FANDEGRADE) alarm occurs if fan speed for one
of the fans in the fan-tray assembly falls under 500 RPM when read by a tachometry counter.
Procedure: Clear the FANDEGRADE Alarm
Step 1 Complete the “Clear the FAN Alarm” procedure on page 2-60.
Step 2 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
2.6.64 FE-AIS
• Not Alarmed (NA), Non-Service Affecting (NSA)
The Far-End AIS condition occurs when an AIS has occurred at the far-end node. FE-AIS usually occurs
in conjunction with an LOS (OC-N) alarm (see page 2-84) downstream.
Procedure: Clear the FE-AIS Condition
Step 1 Complete the “Clear the AIS Condition” procedure on page 2-16.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).