Midea V5 X VRF Series - Page 133

MCAC-VTSM-2015-10 R410A All DC Inverter V5 X Series 50Hz
Troubleshooting 131
Outdoor main PCB ports instructions
No.
Content
Port voltage
1
Discharge temperature detection port of inverter compressor A
DC 0~5V (in dynamic change)
2
Discharge temperature detection port of inverter compressor A or B
DC 0~5V (in dynamic change)
3
Temperature detection port of inverter module
DC 0~5V (in dynamic change)
4
Reserved
/
5
Wiring port for communication between indoor and outdoor units, indoor unit
network, outdoor unit network and network accounting
DC 2.5~2.7V
6
Three-phase detection port
380V
7
Reserved
/
8
Power input of No.1 transformer
220V
9
Power input of No.2 transformer
220V
10
Heat output of inverter compressor A electrical heater
220V
11
Heat output of inverter compressor B electrical heater
220V
12
Drive port of EXV A
The first pin on left: DC 12V
The other four pins: in dynamic change
13
Drive port of EXV B
14
Four-way valve output port
220V
15
One-way valve output port
220V
16
Power output port
220V
17
Null line terminal
0
18
Power output of No.1 transformer
The voltage between upper tow pins: AC
13.5V; The voltage between under tow
pins: AC 9V
19
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
Activation port of inverter module B
The third pin on the left: DC3.3V
21
Voltage detection port of inverter module B
DC 540V, +15V, N
22
Voltage detection port of inverter module A
DC 540V, +15V, N
23
Activation port of inverter module A
The third pin on the left: DC3.3V
24
Power supply port of main PCB
GND, +5V, +12V, GND, 12V
25
ON/OFF signal input port for system low pressure detection
0 or 5V
26
ON/OFF signal input port for system high pressure detection
0 or 5V
27
Reserved
/
28
Reserved
/
29
Current detection port of inverter compressor A and B
AC 0~7.8V (in dynamic change)
30
Input port for system high pressure detection
DC 0~5V (in dynamic change)
31
Reserved
/
32
Outdoor ambient temperature and condenser temperature detection port
DC 0~5V (in dynamic change)
33
Outdoor units communication port
DC 2.5~2.7V
34
Control port of DC fan B
The first pin on left: DC 12V
The other four pins: in dynamic change
35
Control port of DC fan A