Fisher FSAIF-Pro-95AE2 Service Manual page 41

Index1:
1:Indoor or Outdoor DC Fan Motor(control chip is in 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 has
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
2. Outdoor DC Fan Motor (control chip is in outdoor PCB)
Power on ,and check if the fan can run normally, if the fan can run normally, the PCB must has
problems and need to be replaced, If the fan can't run normally, measure the resistance of each two
pins. If the resistance is not equal to each other, the fan motor must have problems and need to be
replaced, otherwise the PCB must has problems and need to be replaced.
Signal Voltage
Vs/Vm 280V~380V
---
GND
Vcc 14-17.5V
Vsp 0~5.6V
FG 14-17.5V
---
0V
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