38MBR: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Index 1
Indoor or Outdoor DC Fan Motor (control chip is in the fan motor). Power on and when the unit is in standby, measure the voltage of pin-1 - pin3, pin4
-pin3 in the fan motor connector. If the value of the voltage is not in the range showing in the table below, the PCB has an issue and needs to be
replaced.
Fig. 21 — Control Chip
Table 17 — DC motor voltage input and output
NO.
COLOR
SIGNAL
VOLTAGE
1
Red
Vs/Vm
200~380V
2
---
---
---
3
Black
GND
OV
4
White
Vcc
13.5~16.5V
5
Yellow
Vsp
0~6.5V
6
Blue
FG
13.5~16.5V
