Troubleshooting the Fan Module in the Cisco cBR
Problem |
Possible Cause |
Solution |
---|---|---|
The STATUS LED of a fan is not illuminated when the Cisco cBR-8 chassis is powered on. Less than 10 seconds have elapsed since the chassis has been powered ON. |
Fan module starts up 10 seconds after the chassis is powered on. |
The corresponding LED illuminates 10 seconds after the chassis is started up. |
The STATUS LED of a fan is not illuminated when the Cisco cBR-8 chassis is powered on. More than 10 seconds have elapsed since the chassis has been powered ON. |
There could be a failure of a Fan Module component. |
Check the status of the LED labeled RPLC. If it is also illuminated then replace the fan module. |
The STATUS LED of a fan is illuminated with Amber light and the Fan Module shows no acoustic indication of failure. Alternatively all fans are acoustically elevated with Amber illumination of one LED on a fan. |
There could be a failure of a Fan Module hardware component. It could also be a minor alarm. |
Replace the Fan Module. |
The RPLC LED of a fan is illuminated with Amber light and the all the Fan Module are acoustically elevated with Amber illumination of one LED on a fan. |
There could be a failure of a Fan Module hardware component. It could also be a minor alarm. |
Replace the Fan Module. |
The RPLC LED of a fan is illuminated with White light. Any minor fan failure occurs. Any sensor or any controller or PCB fails. |
The RPM of any fan is outside the set RPM limit setpoints by less than 300RPM or greater than 1000RPM. Temperature or barometric sensor failure is sensed by the Supervisor. The Supervisor could also set the RPLC LED to White due to the failure of a Fan Module hardware component. It could also be a minor alarm. |
Replace the Fan Module. |
The chip level thermal shutdown alarms could be tripped. The cards are powered off for thermal protection shut down. |
This scenario, considered a double fault condition, occurs when there is a fan failure during elevated temperature conditions without all the fans functioning properly. The cards do not remain cool under such conditions. |
Replace the faulty Fan Module. |
Cisco cBR's Supervisor Cards are prevented from powering up. |
One or more of the Fan Modules have a serious failure such that the error prevents both fans from operating. This could prevent the Cisco cBR's Supervisor Cards from powering up. |
Replace the faulty Fan Module. |
The chassis does not have one or more Fan Modules. |
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The sliding door of the fan bay does not close when the Fan Module is removed. |
The sliding door is stuck. |
Push front flap open and manually slide the door back and forth to ensure free movement of the door. If that doesn't work, pull the door closed to stop air bypass until a fan module is installed. |
The output of the show platform command shows the Fan Module (P10 to P14) in failed state. |
The Fan Module is not inserted. |
Insert the Fan Module. |
The output of the show platform command shows the Fan Module (P10 to P14) in failed state. |
The Fan Module has entered an abnormal state. |
Replace the Fan Module. |