Troubleshooting
Index:
1. Outdoor DC Fan Motor (control chip is in outdoor PCB)
Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the
fan motor must has problems and need to be replaced. otherwise the PCB must has problems and need to be replaced.
2. Outdoor DC Fan Motor (DC motor that control chip on the PCB)
1)Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the
fan motor must has problems and need to be replaced. Otherwise, go to step 2).
2)Power on and when the unit is in standby, measure the voltage of pin4-5 in feedback signal connector. If the value is
not 5V, change the PCB. Otherwise, go to step 3).
3)Rotate the fan by hand, measure the voltage of pin1-5, pin 2-5 and pin 3-5 in feedback signal connector. If any voltage
is not positive voltage fluctuation, the fan motor must has problems and need to be replaced.
NO. 1 2 3 4 5
Color Orange Grey White Pink Black
Signal Hu Hv Hw Vcc GND
Color Red Blue Yellow
Signal W V U
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