Midea VRF Series

V6R VRF 50/60Hz
61
Part 5
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Electrical Components and Wiring Diagrams
Table 5-2.1: Main PCB port
Label in Figure
5-2.1
Port code
Content
Port voltage
1
CN70
EXVA drive port
0V or 12V DC
2
CN72
EXVC drive port
0V or 12V DC
3
CN2
Reserved
12V DC
4
CN82
Control port of relay for AC filter board
0V or 12V DC
5
CN7
Heat exchanger gas temperature sensor(T8) connection,
Heat exchanger liquid temperature sensor(TL) connection
0-5V DC (varying)
6
CN18
High pressure switch and discharge temperature switch(es)
connections
0V or 5V DC
7
CN12
Liquid pipe temperature sensor(T5) connection
0-5V DC (varying)
8
CN10
Suction temperature sensor(T7) connection
0-5V DC (varying)
9
CN14
Heat sink temperature sensor(T9) connection
0-5V DC (varying)
10
CN4
Compressor Discharge temperature sensor(T7C1)
connection
0-5V DC (varying)
11
CN16
Low pressure sensor connection
0-5V DC (varying)
12
CN17
High pressure sensor connection
0-5V DC (varying)
13
CN6
Subcooling gas temperature sensor(T6B) connection
0-5V DC (varying)
14
CN8
Injection liquid temperature sensor(T6A) connection
0-5V DC (varying)
15
CN26
Communication port to compressor drive board
2.5-2.7V DC
16
CN1
Outdoor ambient temperature sensor and outdoor heat
exchanger temperature sensor connections
0-5V DC (varying)
17
CN27
Communication port to fan drive board
2.5-2.7V DC
18
CN31
Reserved
0-5V DC
19
CN21
Reserved
24V AC
20
CN28
Communication port to Network converter assembly
0-12V DC
21
CN11
Reserved
5V DC
22
CN22/CN23
Communication port
2.5-2.7V DC
23
CN91/CN92
Emergency stop port
0V or Open
24
CN42-CN44
CN46/CN49
Solenoid valve drive ports
220V AC
25
CN66/CN66-1
Power supply to compressor crankcase heater
220V AC
26
CN47
Four-way valve drive ports
220V AC
27
CN40/CN47/CN48
/CN80/CN83
Solenoid valve drive ports
220V AC
28
CN30
Power input of main board
220V AC between L1/L3 and N
380V AC between L1 and L3