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Role of each component when motor is driven.
CN4
CN3
CN2
Indoor/outdoor connecting line
220-240V AC
Indoor power
board. (fan-
control circuit)
Indoor controller
board.
Position
sensor circuit
Fan drive speed instruction
Serial signal
5V DC 300bps
Fan rotational speed data
Abnormal signal
Serial signal
5V DC 300bps
Rotational speed detection
signal (hall element)
5V DC pulse
PWM output
3 phase AC (voltage and
frequency are changeable.)
Fan motor
DC brushless
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