Index 1:
1. Outdoor DC fan motor(control chip is inside fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor
connector. If the value of the voltage is not in the range showing in below table, the PCB must have
problems and need to be replaced.
DC motor voltage input and output
NO. Color Signal Voltage
1 Red Vs/Vm 140V~380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 13.5-16.5V
5 Yellow Vsp 0~6.5V
6 Blue FG 15V
2. Indoor or outdoor DC Fan Motor (control chip is in PCB)
Release the UVW connector. Measure the resistance of U-V, U-W, and V-W. If the resistances are not equal
to each other, the fan motor may be experiencing problems and need to be replaced. Otherwise, the PCB
must has problems and need to be replaced.
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