Carrier 42NQV050M Service Manual page 69

A
NO
Is it possible to
change airflow level
to "HIGH"?
YES
Fan motor
operates normally.
rotate cross-flow fan by
fan by hand when the
At this time, is it possible to
detect DC 1V or more
between
Does check display
on remote show high?
Change the new PC
board. Does fan speed
B
NO
Is it possible to
hand properly?
YES
Turn off indoor unit
and rotate cross-flow
NO
unit is on standby.
+ and –
3
5
of motor connector
(CN31).
YES
NO
YES
NO
change?
YES
Does check cross-flow
fan bearing normal
condition?
YES
– 68 –
FILE NO. SVM-10052
Replace
remote
Replace
motor
NO
Replace bearing
of cross-flow fan.
Replace indoor
fan motor.
Peplace main
P.C. board.