MRV Communications MR2228-S2C User Manual download pdf (Page 31)

Appendix A: Troubleshooting

Diagnosing Switch Indicators

Table A-1. Troubleshooting Chart

Symptom Action

PWR LED is Off •Check connections between the switch, the power cord and

the wall outlet.

•Contact your dealer for assistance.

PWR LED is

Amber

Internal power supply has failed. Contact your local dealer for

assistance.

Diag LED is

Amber

•Power cycle the switch to try and clear the condition.

•If the condition does not clear, contact your dealer for

assistance.

Stack LED is

Flashing Amber

• The stack has not completed its initial configuration. Wait a

few minutes for the process to complete.

• If flashing continues, check that the Master Select button is

pressed in on only one switch.

• Check that all stacking cables are properly connected.

Link LED is Off • Verify that the switch and attached device are powered on.

• Be sure the cable is plugged into both the switch and

corresponding device.

• If the switch is installed in a rack, check the connections to

the punch-down block and patch panel.

• 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.

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. If you still cannot isolate

the problem, the internal power supply may be defective.

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MRV Communications MR2228-S2C User Manual Page 31