Main Pcb Ports - Midea V6-i Series Service Manual

Table 5-2.1: Main PCB ports
Label in
Port code
Figure 5-2.1
1 CN18
2 CN19
3 CN4
4 CN5
5 CN3
6 CN3_1
7 CN17
8 CN15
9 CN16
10 CN8
11 CN1
12 CN8_1
13 CN20
14 CN26
15 CN27
16 CN25
17 CN28
18 CN71
19 CN70
20 CN72
21 CN82
22 CN66-CN67
23 CN47
CN41-CN46;
24
CN83-CN85
25 CN30
Content
Low pressure switch connection
High pressure switch and discharge temperature switch(es)
connections
Compressor top temperature sensor (single compressor
units) or compressor A compressor top temperature sensor
(dual compressor units) connection
Discharge pipe temperature sensor (single compressor units)
or compressor B compressor top temperature sensor (dual
compressor units) connection
Inverter module temperature sensor A connection
Inverter module temperature sensor B connection
High pressure sensor connection
Inverter compressor A and B current sensor connections
Reserved
Plate heat exchanger inlet temperature sensor connection
Outdoor ambient temperature sensor and outdoor heat
exchanger temperature sensor connections
Plate heat exchanger outlet temperature sensor connection
Communication port to outdoor unit
Communication port to compressor drive board
Communication port to fan drive board
Communication port
Reserved
EEVB drive port
EEVA drive port
EEVC drive port
Control port of relay for AC filter board
Power supply to compressor crankcase heater
Four-way valve drive ports
Solenoid valve drive ports
Power input of main board
V6-i VRF 50/60Hz
Port voltage
0V or 5V DC
0V or 5V DC
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
0-7.8V AC (varying)
/
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
2.5-2.7V DC
2.5-2.7V DC
2.5-2.7V DC
2.5-2.7V DC
/
0V or 12V DC
0V or 12V DC
0V or 12V DC
0V or 12V DC
220V AC
220V AC
220V AC
220V AC between A/B/C and N;
380V AC between A,B and C
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