User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
4
. Issue 1.6. Date3/2/99
DLP-012
Page 43 of 44 © Copyright Airspan Communications Corporation 1999
DC INPUT FAIL
Alarm Indications
a) AS8100 (Sitespan) : ‘Shelf Controller:Lost Comms With EM’
Rack: Rack alarms indicated.
Shelf: No shelf alarm indications.
or
b) AS8100 (Sitespan) : ‘Combiner:PowerSupply(N):FRU Fail’
( From all installed PSUs)
Rack: Rack alarms indicated.
Shelf: All combiner shelves PSUs show fail.
Probable Cause
a) Failure of both DC inputs.
b) One of the DC inputs has failed.
Consequences
If only one DC supply is lost all three PSUs will report failure to the management
system but the rack is still in operational state.
If both supplies are missing the Radio Link Terminal (CT) will cease to function.