Carrier 40QSM009DS Service Manual page 99

Index 1:
1. Indoor 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
1 Red
2 ---
3 Black
4 White
5 Yellow
6 Blue
Signal Voltage
Vs/Vm 200~380V
--- ---
GND 0V
Vcc 13.5~16.5V
Vsp 0~6.5V
FG 13.5~16.5V
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