-4 Trouble locating and clearing procedures
297-8021-544 Standard 15.01 March 2003
Repairing and replacing NT3X90AF cooling units
(continued)
Summary of Repairing and replacing NT3X90AF cooling units
This flowchart summarizes the
procedure.
Use the instructions that follow
this flowchart to perform the
procedure.
Start
Repair harness
or connections
Harness
has
faults?
End
Contact next
level of support
N
Y
Y
Fan has
faults?
Replace
cooling unit
Replace fan
N
N
Blown
fuse?
Y
Replace fuse
FAN FAIL
lamp out?
Repair
unit?
N
N
FAN FAIL
lamp out?
Y
N
Y
Y