Owner's manual

Chapter 3

Troubleshooting

Follow the guidelines below to test and troubleshoot the installation of the

AT-MCR12 chassis in the event that a problem occurs.

Verify that the PWR A main power supply and PWR B optional power

supply LEDs are green. If one of the LEDs is OFF, do the following:

 Check to be sure that the power supply is securely connected to the

power outlet.

 Check to be sure that the power supply is securely seated in the

chassis.

 For a DC unit, check to be sure that the wires are connected to the

correct terminals.

If AT-MCR12 chassis is not operating correctly after testing and

troubleshooting the installation, refer to “Contacting Allied Telesis” on

page 14 or visit our web site at www.alliedtelesis.com for support

information.