Midea ATOM B Series - Page 39

Atom B Series VRF 50/60Hz
38
Midea
Atom B
Series Service Manual
Figure 5-2.4: 60 model outdoor unit main board ports
Table 5-2.4: 60 model outdoor unit main board ports
Label in
Figure 5-1
Port code
Content
Port voltage
1
CN502
Power input port
AC 220V
2
CN501
Power input port
AC 220 V
3
CN4
Relay control port
DC 12V
4
CN20
Communication port between outdoor
unit and indoor unit
DC 2.5~5V
5
CN18
Outdoor unit heat exchanger pipe
temperature/outdoor environment
temperature detection port
DC 0~5V
6
CN5
Compressor discharge temperature
detection port
DC 0~5V(in dynamic change)
7
CN24
Compressor discharge temperature
detection port
DC 0~5V(in dynamic change)
8
CN9
Signal input port of system high pressure
detect switch
DC 0~5V(in dynamic change)
9
CN12
Signal input port of system low pressure
detect switch
DC 0~5V(in dynamic change)
10
CN27
Online Programmable Port
DC 5V
11
CN22
EEV driving port
The first pin: DC12V;
The other four pins: in dynamic change
12
CN13
Load output port(4-way valve)
AC 220
13
CN50
Power input port
AC 220V
14
CN1
Port
DC 380
15
CN19
DC fan port
DC 380
16
U
Compressor’s U phase voltage output port
DC 0-300 (in dynamic change)
17
V
Compressor’s V phase voltage output port
DC 0-300 (in dynamic change)
18
W
Compressor’s W phase voltage output port
DC 0-300 (in dynamic change)