Midea M-thermal Split MHA-V4W/D2N8 Installation And Owner's Manual page 24

Coding Assembly unit
1 Compressor connection port U
2 Compressor connection port V
3 Compressor connection port W
4 Output port for +12V/5V(CN20)
5 Port for fan(CN19)
2) PCB B, Main control board
1
27
26 25
Coding Assembly unit
1 Output port N to PCB A(CN27)
2 Reserved(CN3)
3 Port for ground wire(CN31)
4 Port for IC programming(CN32)
5 Port for ground wire(CN37)
6 Input port for neutral wire(CN10)
7 Input port for live wire(CN11)
8 DIP switch(SW3)
9 Input port for +12V/5V(CN24)
Port for low pressure switch and high pressure
10
switch(CN13)
11 Port for discharge temp.sensor(CN8)
Port for outdoor ambient temp. sensor and
12
condenser temp.sensor(CN9)
13 Port for sunction temp.sensor(CN1)
14 Port for TF temp.sensor(CN14)
Coding
6
7
8
9
/
2 3
24 23 22 21
Coding
15
16
17
18
19
20
21
22
23
24
25
26
27
20
Assembly unit
Reserved(CN302)
Port for communication with PCB B(CN32)
Input port L for rectifier bridge(CN501)
Input port N for rectifier bridge(CN502)
/
4 5 6
20 19 18 17 16
Assembly unit
Port for pressure sensor(CN4)
Reserved(CN2)
Port for communication with hydro-box control board
(CN29)
Reserved(CN30)
Port for communication with PCB A(CN17)
Port for electrical expansion value(CN33)
Digital display(DSP1)
Port for chassis electrical heating tape(CN16)(optional)
Port for SV6 value(CN5)
Port for 4-way value(CN6)
Port for compressor eletric heating tape 1(CN7)
Port for compressor eletric heating tape 2(CN8)
Ourput port L to PCB A(CN28)
7
8
9
10
11
12
13
14
15