43
Part 4 - Diagnosis and T
roubleshooting
Table 4-2.1:Outdoor unit main PCB for 30kW and 60kW units
Label in Figure 4-2.1
Code
Content
Voltage
1
CN21 Signal output port for filter board relay
0 or 12V DC
2
CN91 Reserve port
0 or 12V DC
3
CN19 ON/OFF signal input port for system low pressure
0 or 5V DC
4
CN69 Temperature detection port (Tp1/Tp2/Tz/7/Taf1)
0~5V DC
5
CN15 Current inspection port of the inverter compressor A/ compressor B
0~5V DC
6
CN10 Heatsink temp. detection port of inverter module B
0~5V DC
7
CN3 Heatsink temp. detection port of inverter module A
0~5V DC
8
CN31 Temperature detection port (Th/Taf2/Two/Twi/Tw)
0~5V DC
9
CN16 Input port for system high pressure detection
0~5V DC
10
CN1 Temperature detection port (T4/T3A/T3B/T5/T6A/T6B)
0~5V DC
11
CN65 Communication port between Main borad and compressor inverter module 0~5V DC
12
CN28 Connection port of auxiliary board (Reserve)
0~5V DC
13
CN64 Communication port between Main borad and fan inverter module
0~5V DC
14
CN61 Communication port between main board and HMI
0~5V DC
15
CN60 Communication port between outdoor units
0~5V DC
16
CN70 Actuation port of EXV A
0 or 12V DC
17
CN52 Signal output port for filter board relay
0 or 12V DC
18
CN20 ON/OFF signal input port for system discharge temperature
0 or 12V DC
19
CN85 Output port for alarm
0 or 230V AC
20
CN2 Output port for auxiliary heater of pipeline
0 or 230V AC
21
CN83 Output port for compressor state
0 or 230V AC
22
CN83 Output port for pump
0 or 230V AC
23
CN14 Output port for valve SV2
0 or 230V AC
24
CN4
CN11 Output port for electrical heater of water switch
0 or 230V AC
25
CN5
CN13
CN42
CN43
CN6
CN41
CN40
CN47
CN12
CN80
Output port for valve and electrical heater of crankcase and plate exchanger 0 or 230V AC
26
CN32 Input of three-phase four-wire power supply
L1&N: 230V AC
L2&N: 230V AC
L3&N: 230V AC
27
CN100 PE port
0V AC
28
CN74 The power supply port of the HMI .(DC9V)
9V DC
29
ENC2
ENC4
S5
S6
S12
Out setting switch
0 or 5V DC
Table continued on next page……
