Fan Alarms Testing Opm - Nortel DMS-100 Series Maintenance Manual

Summary of fan alarms testing in an OPM
Contact your
N
maintenance
support group
Contact your
N
maintenance
support group
Contact your
N
maintenance
support group
Remove power
from one ECU
Is alarm
generated?
Y
Clean fan blades
and repower ECU
Do fans run
smoothly?
Y
Check MAP display
Does alarm
Y
clear at MAP
display?
DMS-100 Family OPM Maintenance Manual XPM14 and up
OPM routine maintenance procedures
This flowchart summarizes the
procedure.
Use the instructions that follow
this flowchart to perform the
procedure.
Have both
N N
ECU units
been tested?
Check MAP display
Y
Does alarm
clear at MAP
display?
Replace BFU fuse
Y
Does removed
BFU fuse cause
an alarm?
Remove fuse
from BF
13-43
Fan alarms testing
OPM
(continued)
Y
End of
procedure
Contact your
N
maintenance
support group
Contact your
N
maintenance
support group