– 75 –
Turn off power
supply once, and
turn it on again.
Start to operate
indoor unit in cooling
operation at airflow
level “LOW”.
YES
(3) Only the indoor motor fan does not operate
<Primary check>
1. Is it possible to detect the power supply voltage (AC220–240V) between
Q
and
R
on the terminal block?
2. Does the indoor fan motor operate in cooling operation?
(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned
on, to prevent a cold air from blowing in.)
Control P.C. board failure
Change airflow level
to “HIGH”.
When rotating the
cross-flow fan by hand
at the operation stop
condition, is the rotation signal
(DC+12V 0V) detected between
2 (Purple lead) and 3
(Blue lead) of the motor
connector (CN33)
(1 pulse / 1 revolutio).
Dose AC120V or
ligher voltage apply to
between red and black lead
of the motor?
Is it possible to
change airflow level
to “HIGH”?
Stop the operation
Does fan motor
continue to operate?
Does indoor
fan operate?
Fan motor
operates normally.
Replace main
P.C. board.
Replace
YES
YES
YES
Motor circuit (D301, IC31, Q301
12V power circuit (T101) failure.
Replace the fan motor.
YES
NO
NO
Replace the P.C. board.
NO
NO
NO
Turn OFF the power
Change airflow level
to “HIGH”.
Change airflow level
to “HIGH”.
Is it possible to
YES
rotate cross-flow fan by
hand properly?
NO
Turn OFF the power
bearing.
(42NQV025H, 42NQV035H, 42NQV035M)
FILE NO. SVM-07013