Nortel North American DMS-100 Instruction Manual page 63

Repairing an NTBX63AA cooling unit on the bench top
Summary of Repairing an NTBX63AA cooling unit on the bench top
This flowchart summarizes the
procedure.
Use the instructions that follow
this flowchart to perform the
procedure.
Contact next
level of support
DMS-100 Family NA100 Trouble Locating and Clearing Procedures Volume 2 of 2 LET0015 and up
Trouble locating and clearing procedures (continued)
Start
Y
Defective
harness?
N
Y
Defective
fan?
N
Defective
Y
air flow
sensor?
N
No de-
fect
Y
found?
N
End
(continued)
Repair wiring
harness
Replace fans
Remove
Turn power off
cooling unit
Replace air
flow sensor
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