
3 TROUBLESHOOTING
When a fault occurs with the system, the red alarm LED on the PDU and the PDU
1.Check that power is present at the PDU. The PDU will not operate if DC is not present, polarity is incorrect, or the DC presented is out of specifications
2.Each MHU output has a status LED. Status LED for each MHU that is in use should be
GREEN.
3.Disable or disconnect any unused MHU ports to prevent false alarm conditions.
4.Verify that DC voltage is present at the MHU port on the PDU. Disconnect the MHU
5.Verify that DC voltage is present at the antenna side of the
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© 2006, ADC Telecommunications, Inc.