Carrier 42HVM109303 Service Manual page 49

Index 1:
1.Indoor or Outdoor DC Fan Motor(control chip is in fan motor)
Measure the resistance value of each winding by using the tester. If any resistance value is zero, the
fan motor must has problems and need to be replaced.
Index2:
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
Signal Voltage
Vs/Vm 280V~380V
---
GND
Vcc 14-17.5V
Vsp 0~5.6V
FG 14-17.5V
---
0V
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