Dc Fan Motor (Control Chip Is Inside Fan Motor); Test The Voltage - Carrier 38MGR Series Service Manual

DIAGNOSIS AND SOLUTION (CONT)
Index 1:

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 the table below, the PCB needs to be replaced.
Vs
Vsp
38MGR-04SM
Fig. 60 — DC Fan Motor
NO. COLOR
1 Red
2 ---
3 Black
4 White
5 Yellow
6 Blue
Fig. 61 —Test the Voltage
Specifications subject to change without notice.
SIGNAL VOLTAGE
Vs/Vm 200~380V
--- ---
GND 0V
Vcc 13.5~16.5V
Vsp 0~6.5V
FG 13.5~16.5V
Vcc
FG
51