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PPENDIX
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ROUBLESHOOTING

Diagnosing Switch Indicators

Power and Cooling Problems

If the power indicator does not turn on when the power cord is plug ged 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 th e power
Troubleshooting Chart
Symptom Action
Power LED is Off • Internal power supply is disconnected.
• Check connections between the switch, the power
cord, and the wall outlet.
• Contact SMC Technical Support.
Power LED is Red • Internal power supply has failed. Contact your local
dealer for assistance.
Link LED is Off • Verify that the switch and attached device is 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.