Trane TVR Pro CO Series Service Manual page 44

Table 5-2.1: Main PCB ports
Label Port code
1 CN18
2 CN19
3 CN4
4 CN5
5 CN3
6 CN13
7 CN17
8 CN15
9 CN16
10 CN8
11 CN1
12 CN6
13 CN22-CN23
14 CN26
15 CN27
16 CN9
17 CN28
18 CN71
19 CN70
20 CN72
21 CN82
CN41, CN43,
22
CN46
23 CN30
24 CN66-CN67
Content
Reserved
Low pressure switch connection
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
Reserved
Reserved
Reserved
Outdoor ambient temperature sensor and outdoor heat
exchanger temperature sensor connections
Reserved
Communication port to outdoor units
Communication port to compressor drive board
Communication port to fan drive board
Communication USB port
Reserved
Reserved
EXVA drive port
Reserved
Control port of relay for AC filter board
Solenoid valve drive ports
Power input of main board
Power supply to compressor crankcase heater
/
0V or 5V DC
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
/
/
/
0-5V 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 220V AC
220V AC between A/B/C and N;
380V AC between A,B and C
220V AC
43
Port voltage