35
Index
1:
Indoor or outdoor DC fan motor (control chip is in fan motor) Measure the resistance value of each winding by using the tester . If any
resistance value is zero, the fan motor must have problems and needs to be replaced.
Fig. 37 – Fan motor
Index
2:
1 Indoor or Outdoor DC Fan Motor (control chip is in the fan motor). Power on and when the unit is in standby, measure the voltage of
pin- 1 - pin3, pin4- pin3 in the fan motor connector. If the value of the voltage is not in the range showing in the table below, the PCB
has an issue and needs to be replaced.
Fig. 38 – Control chip
DC motor voltage input and
output
No.
Color Signal Voltage
1 Red Vs/Vm 280V- 380V
2 --- --- ---
3 Black GND OV
4 White Vcc 14- 14.5V
5 Yellow Vsp 0~5.6V
6 Blue FG 14- 17.5V
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