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Chapter 4
Power Supply
Troubleshooting
Troubleshooting
This chapter includes troubleshooting and replacement procedures for the
VSU-7500 power supply modules, cooling fans, and dual-port Ethernet modules.
The VSU-7500 includes redundant power supply modules. If one fails, the
second power supply instantly takes over, without disrupting the operation of the
unit.
Each of the two power supply modules are hot-swappable and can be replaced
without powering down the VSU-7500.
NOTE: The VSU-7500 is provisioned with one two different power supply
module types. Replacement procedures for both types are provided in this
section.
Fault Indication
If one of the power supply modules fails, an audible alarm will sound, the green
LED status indicator on the power supply subsystem extinguishes, and an error
message is sent to the console port. In addition, SNMP trap and syslog error
messages are sent to the management station.
The VSU-7500 should continue to operate correctly with a single functional
power supply. The audible alarm automatically silences after a preset time.
Contact your customer service representative to obtain a replacement for the
defective power supply module.
WARNING: To ensure that the power supply ventilation system continues to
work correctly, do not remove the defective power supply module until you
have a replacement unit available.
4-1
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