Midea SMK-D140HHN1-3

High Temperature Hydro Module
202003 7
Service
Manual
5.1 Main PCB
NO.
Port code
Port
code
Content
Port voltage
1
X1X2
CN15
Port for communication with wired controller
0 or 18VDC
2
N1N2
Port for signal of free electricity
0 or 12VDC
3
M1M2
Port for signal of valley electricity
0 or 12VDC
4
PQ
CN17
Port for communication with outdoor unit
2.5-2.7VDC
5
D1D2E
Port for communication with KNX gateway or port for
communication with slave hydro box (group control)
2.5-2.7VDC
6
Y1Y2
CN20
Reserved
\
7
C-PUMP N
Port for circulating pump
220V AC
8
DHW-PUMP
N
Port for DHW pump
220V AC
9
SV3
CN21
Port for three way valve(NC. N for normal close valve,
NO. N for normal open valve)
220V AC
10
N MLSP1
CN22
Port for multiple set point 1
220V AC
11
N MLSP2
Port for multiple set point 2
220V AC
12
AL. N
Reserved
\
13
ST
CN23
Reserved
\