Fisher FSKIF-121AE2-EU Service Manual page 138

Troubleshooting
2.4.1.5. Indoor fan speed has been out of control.
Index 1:
1. Indoor 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 below table, the PCB must have
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
134
Signal Voltage
Vs/Vm 200V~380V
--- ---
GND 0V
Vcc 13.5-16.5V
Vsp 0~6.5V
FG 13.5-16.5V
Electrical Control System