34
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.
Fig. 32 – Motor Connector
Table 19—DC motor voltage input and output (voltage: 220−240V~)
NO.
COLOR
SIGNAL
VOLTAGE
1
Red
Vs/Vm
280V~380V
2
---
---
---
3
Black
GND
0V
4
White
Vcc
14-17.5V
5
Yellow
Vsp
0~5.6V
6
Blue
FG
14-17.5V
Table 20—DC motor voltage input and output (voltage : 115V~)
NO.
COLOR
SIGNAL
VOLTAGE
1
Red
Vs/Vm
140V~190V
2
---
---
---
3
Black
GND
0V
4
White
Vcc
14-17.5V
5
Yellow
Vsp
0~5.6V
6
Blue
FG
14-17.5V
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.
