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Appendix A: Troubleshooting
Diagnosing Switch Indicators
Symptom
Power LED is Off
Power LED is Amber
Power LED Flasing Amber
Diag LED is Flashing Amber
PoE Status LED is Flashing or
On Amber
Link LED is Off
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you may
have a problem with the power outlet, power cord, or internal power supply.
However, if the unit powers off after running for a while, check for loose power
connections, power losses or surges at the power outlet, and verify that the fans on
the unit are unobstructed and running prior to shutdown. If you still cannot isolate the
problem, then the internal power supply may be defective.
Table A-1 Troubleshooting Chart
Action
• Check connections between the switch, the power cord, and the wall
outlet.
• Contact your dealer for assistance.
• Internal power supply or RPU has failed. System is being powered by
connected RPU. Contact your local dealer for assistance.
• RPU has failed.
• Power cycle the switch to try and clear the condition.
• If the condition does not clear, contact your local dealer for assistance.
• Flashing amber indicates a high temperature warning. On amber
indicates a thermal shutdown for the whole system. Power off the unit
and allow time for it to cool.
• Check that cooling fans on the unit are operating properly. If
necessary, replace the unit.
• Verify that the switch and attached device are powered on.
• Be sure the cable is plugged into both the switch and corresponding
device.
• Verify that the proper cable type is used and its length does not exceed
specified limits.
• Check the adapter on the attached device and cable connections for
possible defects. Replace the defective adapter or cable if necessary.
A-1
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