User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 7-13
Diagnostics & Troubleshooting
Self-Tests
Figure 7-3 DS3 Card Self-Test
FFO Test and Monitoring
Fan Faceplate Option (FFO) operation is automatically tested 30 seconds after installation. Also,
the FFO can be manually tested with the test fan [a|b|all] command. The FFO test applies power to
the fans for 30 seconds (there is a five-second delay after power is applied to the first fan until power
is applied to the second fan). During the 30-second test the rotation speed of each fan is monitored.
If either fan does not rotate at the correct speed, an error is logged, a Fan A and/or Fan B failure
alarm is enabled, and the Controller Status LED blinks red. Once a fan failure is detected, the
malfunctioning fan remains disabled until a new faceplate is installed.
If the speed of the fans is sufficient to cool the Wide Bank, they pass the self-test and they remain
enabled. Each Controller continually monitors the speed of its fan. If either fan is too slow for 30
consecutive seconds, the malfunctioning fan is disabled and a major alarm (Fan A, Fan B, or all
Failure) is generated. The alarm remains active until the malfunctioning FFO faceplate is removed.
If the configuration for ffo present is on when the faceplate is removed, and power is on, another
major alarm (Fan Faceplate Not Installed) becomes active. Alarms will clear when the faceplate is
re-installed.
To prevent the Fan Faceplate Not Installed alarm, issue the ffo present off command in the command
line interface before removing the faceplate.
NOTE: The test all command includes the fan test for both fans, only if the Controller is
a version that supports the Fan Faceplate Option and only if the FFO is installed. If the
Controller is an older version, or if the fans are not present, the fan tests are omitted.
Perform
Self-Test
Send AIS
Relays
Trans-
ceiver
Selector
M13
Framer
Trans-
ceiver
Relays
LS Card HS Card
Toward DS3
DS1/E1 DS3
Send AIS
Toward DS1/E1