User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
3
. Issue 1.6. Date3/2/99
Page 12 of 22 © Copyright Airspan Communications Corporation 1999
2.1.8. FRU Failed -From RF Combiner PSU
Message: ‘Combiner:PowerSupply(N):FRU Fail’
Source: One of the three PSU at CT Combiner Shelf.
Fault Condition: One of the three PSUs in the combiner shelf is in alarm state. In
cases where only one PSU has been provided there will be a failure
of the shelf connected to that PSU. In this case the fault is
indistinguishable from an exchange supply failure.
If a group of intermittent alarms followed by set alarm for all RF
combiner PSUs fitted (typically 2 or 3 if units not fitted they will be
the state “ISENP”) then it is likely that one of the DC power feeds
to the rack has failed.
Likely Cause: Faulty PSU module.
.
Consequential Effect: A PSU will report failure to the Sitespan .
Repair Actions:
a) Individual ‘Combiner:PowerSupply(N):FRU Fail’ (probably
preceded by an intermittent ‘Combiner:PowerSupply(N):FRU
Fail’ Replace faulty PSU module. Refer to detailed level procedure
DLP-012 in Section 4.
b) A group of ‘Combiner:PowerSupply(N):FRU Fail’ (probably
preceded by an group of intermittent) check the DC supply feeds to
the rack.