32808001101
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Specifications subject to change without notice.
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 13 or Table 14, the PCB has an issue and needs to be replaced.
Fig. 34
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Motor Connector
Table 13—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 14—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)
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.
3. Indoor AC Fan Motor
Power on the unit and set the unit in FAN mode at the high fan speed. Run for 15 seconds then measure the voltage of pin1 and pin2. If the
voltage value is less than 100V(208~240V power supply) or 50V(115V power supply), the PCB has an issue and needs to be replaced.
