Midea MC-SU30-RN1L

Aqua Tempo Super II
201709 37
Part
4 - Diagnosis and Troubleshooting
Table 4-2.1:Outdoor unit main PCB
Label in
Figure
4-2.1
Code
Content
Voltage
1
CN1
Pump 1 connection
0-220V AC(varying)
2
CN30
Power sequence detection connection
380V
3
S5
DIP switches
-
4
CN72
Power supply to user interface
9V DC
5
ENC1
Unit capacity dial switch
-
6
ENC3
Address dial switch
-
7
DSP1
Digital display
-
8
FUS1
Fuse
220V AC
9
CN43
Power input
220V AC
10
CN12_1,
CN12_2
Solenoid valve(SV4) drive ports
0-220V AC(varying)
11
IC25
Main control chip
-
12
CN64
Debug port
5V DC
13
CN16
Four-way valve drive port
0-220V AC(varying)
14
CN5,
CN5_1
Water side heat exchanger heater connections
0-220V AC(varying)
15
CN4,
CN4_1
Water flow switch heater connection
0-220V AC(varying)
16
CN3
CN3_1
Compressor crankcase heater connections
0-220V AC(varying)
17
CN49
Reserved communication port
2.5-2.7V DC
18
CN52
CN53
Fan inverter module communication ports
2.5-2.7V DC
19
CN50
CN51
Compressor inverter module communication ports
2.5-2.7V DC
20
CN55
EXV drive port
12V DC
21
CN60
CN71
Wired controller communication ports
2.5-2.7 DC
22
CN24
Outdoor ambient temperature sensor and air side heat exchanger refrigerant
outlet temperature sensor connections
0-5V DC (varying)
23
CN69
Water side heat exchanger anti-freezing temperature sensor 1, air side heat
exchanger refrigerant total outlet temperature sensor, discharge temperature
sensor 2 and discharge temperature sensor 1 connections
0-5V DC (varying)
24
CN31
Air suction temperature sensor, water side heat exchanger anti-freezing
temperature sensor 2, water side heat exchanger water outlet temperature
sensor, water side heat exchanger water inlet temperature sensor and combined
water outlet temperature sensor connections
0-5V DC (varying)
25
CN40
Pressure sensor connection
0-5V DC (varying)
26
CN41
CN42
Inverter module temperature sensor 1 and Inverter module temperature sensor 2
connections
0-5V DC (varying)
27
CN62
AC indicator A and AC indicator B connections
0-5V DC (varying)
28
CN65
Low pressure switch connection
0 or 5V DC (varying)
29
CN47
High pressure switch and discharge temperature switch (es) connections
0 or 5V DC (varying)
30
CN58
CN59
AC filter board communication ports
12V DC