Midea MCA3U-09HRFN1-M(C)

213
showing in below tables, the outdoor main PCB must has problems and need to be
replaced.
Port
Description
Parameter
Remark
CON1
Power input for the PCB
192-380V/DC
CN1
Communication with main PCB
DC
CN2
Test port
5V/DC
For debugging board
FAN1
UVW output for DC fan motor
FAN2
UVW output for DC fan motor
CN1 Communication with main PCB
NO.
Signal
Voltage
1
Vcc
+15V
2
GND
3
TXD
0~6V
4
RXD
0~15V
5
--
--