Index; Indoor Or Outdoor Dc Fan Motor; Outdoor Dc Fan Motor; Motor Connector - Carrier 38MAQB12-1 Service Manual

DIAGNOSIS AND SOLUTION (CONT)

Index 1

1 Indoor or Outdoor DC Fan Motor (control chip is in fan motor)
S
Power on and when the unit is in standby, measure the voltage of pin1−pin3, pin4−pin3 in fan motor connector. If the voltage value
is not in the range shown in Table 19 or Table 20, the PCB has an issue and needs to be replaced.
NO.
1
2
3
4
5
6
NO. COLOR
1
2
3
4
5
6
2 .Outdoor DC Fan Motor (control chip is in the outdoor PCB)
S
Power on the unit and check if the fan runs normally. If the fan runs normally, the PCB has an issue and needs to be replaced. If the
fan does not run normally, measure the resistance of each two pins. If the resistance is not equal to each other, the fan motor has an
issue and needs to be replaced, otherwise the PCB has an issue and needs to be replaced.
Fig. 32 – Motor Connector
Table 19—DC motor voltage input and output (voltage: 220−240V~)
COLOR SIGNAL
Red Vs/Vm
--- ---
Black GND
White Vcc
Yellow Vsp
Blue FG
Table 20—DC motor voltage input and output (voltage : 115V~)
SIGNAL
Red Vs/Vm
--- ---
Black GND
White Vcc
Yellow Vsp
Blue FG
VOLTAGE
280V~380V
---
0V
14-17.5V
0~5.6V
14-17.5V
VOLTAGE
140V~190V
---
0V
14-17.5V
0~5.6V
14-17.5V
34