York HP Series, Service Manual

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Index 1:
1. Indoor or outdoor DC fan motor (Control Chip is in Fan Motor)
Turn power on and while the unit is on standby, measure the voltage between pin1 and pin3 as well as
between pin4 and pin3 in fan motor connector. If the value of the voltage is not within the range shown
in the following table, the PCB may be experiencing problems and need to be replaced.
DC motor voltage input and output
NO. Color Signal Voltage
1 Red Vs/Vm 200~380V
2 --- --- ---
3 Black GND 0V
4 White Vcc 13.5~16.5V
5 Yellow Vsp 0~6.5V
6 Blue FG 13.5~16.5V
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.