Power Failure; Fan Failure Problem Fails To Be Detected By Led Or Aac; Related Documents - Cisco VCO/4K Mechanical Assemblies

RELATED DOCUMENTS

6.2 Power Failure

If a fan unit fails to operate, be sure that power is being provided to the system. Check that the
power supply LED is illuminated.
If the power LED is illuminated and the fan unit's front panel LED is extinguished, suspect
that no power is being supplied to the fan unit. Remove the fan unit and check that the power
plug on the back, left side of the fan unit is plugged in.
If the fan unit still does not operate, contact and report your findings to Cisco Systems
Technical Support and request further assistance.

6.3 Fan Failure Problem Fails to be Detected by LED or AAC

If a fan fails to operate and the LED does not illuminate, or an alarm is not sent to the AAC,
check the following.
The troubleshooting procedures below require that the fan unit be removed from the VCO/4K.
Refer to Section 5.0 for removal procedures.
If the LED does not illuminate, check that:
• the internal connectors have not become disconnected between the three fan control
cards.
• the plug to the LED has not become disconnected.
If an alarm is not sent to the AAC, check that:
• the internal connectors have not become disconnected.
7.0 RELATED DOCUMENTS
For additional information about fan units, refer to the following technical publications:
• Cisco VCO/4K Hardware Planning Guide
• CiscoVCO/4K Hardware Installation Manual
• CiscoVCO/4K System Maintenance Manual
• Cisco VCO/4K Mechanical Assemblies: VCO/4K Power Subsystem
• Cisco VCO/4K Mechanical Assemblies: VCO/4K System Enclosure
1-8 Cisco VCO/4K Mechanical Assemblies