Trane TVR Pro CO Series Service Manual page 43

Table 5-2.1: Main PCB ports
Label in Figure 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
23
24
25
26
Port code
CN70 EEVA drive port
CN72 EEVC drive port
CN71 EEVB drive port
CN82 Control port of relay for AC filter board
High pressure switch and discharge temperature
CN18
switch(es) connections
CN19 Low pressure switch connection
CN13 Inverter module temperature sensor B connection
CN3 Inverter module temperature sensor A connection
CN15 Inverter compressor A and B current sensor connections
Compressor top temperature sensor (single compressor
CN4 units) or compressor A compressor top temperature
sensor (dual compressor units) connection
Discharge pipe temperature sensor (single compressor
CN5 units) or compressor B compressor top temperature
sensor (dual compressor units) connection
CN17 High pressure sensor connection
CN16 Reserved
CN8 Plate heat exchanger inlet temperature sensor connection
Plate
CN6
connection
Outdoor ambient temperature sensor and outdoor heat
CN1
exchanger temperature sensor connections
CN26 Communication port to compressor drive board
CN27 Communication port to fan drive board
CN28 Reserved
Communication port
CN22、CN23
CN9 USB UPGRADE
Solenoid valve drive ports
CN41、CN43、CN46
CN66-CN67 Power supply to compressor crankcase heater
CN47 Four-way valve drive ports
CN80 Alarm signal output port (reserved)
CN30 Power input of main board
Content
heat exchanger outlet
42
0V or 12V DC
0V or 12V DC
0V or 12V DC
0V or 12V DC
0V or 5V DC
0V or 5V DC
0-5V DC (varying)
0-5V DC (varying)
0-7.8V
(varying)
0-5V DC (varying)
0-5V DC (varying)
0-5V DC (varying)
/
0-5V DC (varying)
temperature sensor
0-5V DC (varying)
0-5V DC (varying)
2.5-2.7V DC
2.5-2.7V DC
/
2.5-2.7V DC
220V AC
220V AC
220V AC
220V AC
220V AC between
L1/L2/L3
Port voltage
AC