Main Pcb Port - Midea VRF Series Service Manual

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