Midea RSJ-120/ZN1-540V1 User Manual

MCAC-HTSM-201906 Midea R410A Direct Heating Type HPWH 50Hz Technical Manual
26
Table 2-7.1: Main PCB descriptions
Label in
Figure 2-7.1
Code
Content
1
CN31
AC Power input
2
CN32
Transformer input
3
CN13
Compressor contactor control port connection
4
CN7
Fan motor connection and refrigerant pipe E-heating connection
5
CN57
Electric ball valve on
6
CN56
Electric ball valve off
7
CN11
Compressor crank E-heating connection
8
CN17
Solenoid valve connection
9
CN16
4-way valve connection
10
CN41
Circuit water pump and E-heater control
11
CN24
Remote alarm connection
12
CN25
Electronic expansion valve connection
13
CN28
Water flow control valve connection
14
CN38
Transformer output
15
CN36
Wire controller power supply
16
CN2
Remote on/off switch connection
17
CN1
Communication port
18
CN39
PQE communication port
19
CN40
PQE communication port
20
CN15
Low pressure switch connection
21
CN21
High pressure switch connection
22
CN43
T6b Refrigerant heating pipe temperature sensor connection (Reserved)
23
CN35
Water tank temperature sensor connection
24
CN34
Water outlet temperature sensor connection
25
CN30
Refrigerant heating pipe temperature sensor connection
26
CN29
Water inlet temperature sensor connection
27
CN27
Compressor discharge temperature sensor connection
28
CN26
Compressor suction temperature sensor connection
29
Check switch
30
Digital pipe
31
Address dial code
32
Dial switch
33
CN37
Black: Air side heat exchanger temperature sensor connection;
White: Ambient temperature sensor connection;
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Midea RSJ-120/ZN1-540V1 Specifications

General

Brand	Midea
Model	RSJ-120/ZN1-540V1
Category	Heat Pump
Language	English