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9-3-6. Only the Indoor Fan does not Operate
< Check procedure >
YES
NO
Replace the
PC board.
Shut off the power
supply once.
Does the fan
stop in no operating
status?
Control PC board is defective.
Replace the PC board.
Start the operation
with low fan setting
in cool operation.
Does the fan rotate?
Change the setting of
cooling to high fan.
Does the fan speed
become higher?
Operation
stops
Normal
Is the voltage
measured DC35V
between
1 (red lead wire, +)
and
2 (black lead wire, –)
of the motor connector
(CN10) ?
Shut off the power supply.
Does the cross
flow fan rotate
normally?
Repair the
bearing of
the drain fan.
Turn on the power supply.
Is the rotation signal
(DC+5V-0V) output between
4
(blue lead wire) and
2 (black
lead wire) of the motor connector
(CN10) when rotating the cross
flow fan by hand in no operating
status ? (2 pulses/one turn)
Replace the control
PC board.
Shut off the power supply,
and turn it on after
disconnecting the motor
connector (CN10)
*
from
the PC board.
Is the voltage of
DC35V measured
between 1 (red lead wire, +)
and 2 (black lead wire, –) of
the motor connector
(CN10) ?
Replace the
fan motor.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Turn the power supply.
*
Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of
damage of the motor.