DM14-01.01.18en
MIV V5 Heat Recovery DC Inverter R410A
151
Troubleshooting
Outdoor main PCB ports instructions
No. Port
code Content
Port
voltage
1
CN10
Discharge temperature detection port of inverter compressor A DC 0~5V (in dynamic change)
2
CN11
Discharge temperature detection port of inverter compressor B DC 0~5V (in dynamic change)
3
CN4
Inverter module temperature detection port
DC 0~5V (in dynamic change)
4 CN26
Reserved
/
5 CN25
Wiring port for communication between indoor and outdoor
units, indoor unit network, outdoor unit network and network
accounting
DC 2.5~2.7V
6 CN30
Three-phase
detection
port
380V
7 CN80
Reserved
/
8
CN31
Power input of No.1 transformer
220V
9
CN33
Power input of No.2 transformer
220V
10
CN66
Heat output of inverter compressor A electrical heater
220V
11
CN67
Heat output of inverter compressor B electrical heater
220V
12
CN70
Driver port of EXV A
The first pin on left: DC 12V
The other four pins: in dynamic change
13
CN71
Driver port of EXV B
14
CN47-CN49 Four-way valve output port
220V
15
CN41-CN45 One-way valve output port
220V
16
CN54
Power output port
220V
17
CN57-CN59 Null line terminal
0
18
CN32
Power output of No.1 transformer
The voltage between upper tow pins: AC
13.5V; The voltage between under tow
pins: AC 9V
19
CN34
Power output of No.2 transformer
The voltage between upper tow pins: AC
14.5V; The voltage between under tow
pins: AC 14.5V
20
CN39
Activation port of inverter module B
The third pin on the left: DC3.3V
21
CN38
Voltage detection port of inverter module B
DC 540V, +15V, N
22
CN36
Voltage detection port of inverter module A
DC 540V, +15V, N
23
CN37
Activation port of inverter module A
The third pin on the left: DC3.3V
24
CN35
Power supply port of main PCB
GND, +5V, +12V, GND, 12V
25
CN19
ON/OFF signal input port for system low pressure detection
0 or 5V
26
CN18
ON/OFF signal input port for system high pressure detection
0 or 5V
27 CN28
Reserved
/
28 CN16
Reserved
/
29
CN15
Current detection port of inverter compressor A and B
AC 0~7.8V (in dynamic change)
30
CN17
Input port for system high pressure detection
DC 0~5V (in dynamic change)
31
CN2
Right condenser temperature detection port
DC 0~5V (in dynamic change)
32 CN1
Outdoor ambient temperature and left condenser temperature
detection port
DC 0~5V (in dynamic change)
33
CN20
Outdoor units communication port
DC 2.5~2.7V
34
CN65
Control port of DC fan B
The first pin on left: DC 12V
The other four pins: in dynamic change
35
CN64
Control port of DC fan A
