Midea Mini C Series Service Manual page 41

Mini C Series VRF 50/60Hz
Figure 5-1.4: 140/160 model outdoor unit Communication switchboard PCB Ports
Table 5-1.4: 140/160 model communication switchboard PCB ports
Label in
Port code
Figure 5-1.4
1 CN502
2 CN501
3 CN4
4 CN20
5 CN21
6 CN18
7 CN5
8 CN24
9 CN12
10 CN27
11 CN22
12 CN13
13 CN7
14 CN10
15 CN11
16 CN50
17 /
18 CN17
19 CN19
20 U
21 V
22 W
40
Content
Power input port
Power input port
Relay control/current sampling input port
Communication port between outdoor unit and indoor
unit
Reserved
Outdoor unit heat exchanger pipe temperature/outdoor
environment temperature detection port
Compressor discharge temperature detection port
Compressor discharge temperature detection port
Signal input port of system low pressure & high pressure
detect switch
Online Programmable Port
EEV driving port
Load output port(4-way valve)
Reserved
Reserved
Load output port(crankcase heating)
Power input port
EEPROM Port
DC fan1 port
DC fan2 port(Reserved)
Compressor's U phase voltage output port
Compressor's V phase voltage output port
Compressor's W phase voltage output port
Port voltage
AC 220V
AC 220V
DC 12V/AC 0-10.4V
DC 2.5~5V
/
DC 0~5V(in dynamic change)
DC 0~5V(in dynamic change)
DC 0~5V(in dynamic change)
DC 0~5V(in dynamic change)
DC 5V
The first pin: DC12V;
The other four pins: in dynamic change
AC 220
/
/
AC 220
AC 220V
DC 5V
DC 380
DC 380
DC 380
DC 380
DC 380