Comment To Fault Codes - Nortel DCT1900 Technical Product Manual

Technical Product Manual - DCT1900
Maintenance, Service Messages

4.3.1 Comment to Fault Codes

Fault 17 ... 26, 28, 29, 41
Fault 35, 36, 37
Fault 52
4-4
CPU faults. Replacement of the CPU requires saving of its data
to PC first by "System Manager-Save/Restore". If not possible
any more, restore the new CPU with the most recent save file
on disk (EEPROM.SAV and SPU_S.SAV).
These faults may disappear automatically. The DTU sends a
message to T&M and T&M clears the fault status: L1 = AVE
and L2 = AVE. However, the service error message remains
and the general alarm as well. They must be cleared by "Clear
Service."
Maintenance personnel must verify if the subject is operational
or not. It may occur that a subject is given "AVE," but not
working any more. If not working, reset the subject and wait for
new fault message. If operational then simply wait to see if the
fault reappears.
Maint-DCT1900/R8/mw
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