Midea MSG-12HRIN2 User Manual

Service manual
14
7. Schematic diagram and Wiring diagram
7.1. Schematic diagram
7.1.1 Display board(MSH-18HRIN1,MSC-18HRIN1)
1 2 3 4 56
A
B
C
D
6
54321
D
C
B
A
Scale Sheet
Size FCSM No. DWG No. Rev
0 of 0
B
LED2
FROM INDOOR PCB
1
2
3
4
5
6
7
CN1
+5
LED3LED1
+5
Q1
9012
TIME Y
DEF R
AUTO G
R1 102
R11 391 R12 391 R13 391 R14 391
R15 221
104
C1
C3
104
Q2
9013
R5
102
R6
221
R4 221
R2 102
R3 221
R9 22 1
R8
102
Q4
9012
Q3
9012
R16 391
R17 221
C5
104
10u/16V
E4
REC1
R10
151
47u/16V
E2
R7
221
CLK
DATA
REMOTE
+5V
GND
DIGI
8LED
Dsa
1
Dsb
2
Q0
3
Q1
4
Q2
5
Q3
6
GND
7
CP
8
MR
9
Q4
10
Q5
11
Q6
12
Q7
13
Vcc
14
IC 1
74HC164
+5
+5
+5
+5
ddpe
f
g
dig.2
dig.1
c
b
a
C6
102
DISP 1
DISP2
7.1..2 Indoor main PCB(MSH-18HRIN1,MSC-18HRIN1)
1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
IC6
PC 817
3
4
DZ 1
24V
C13
473
IC1 0 PC 851
N
L
1
2
CN 10
1
2
CN 9
X1
2.5 M
R10
1M
RST
C26
104
+5V
R13
10K
1
2
3
IC9
704 2
RST
LE D_C DA TA
TX D
CL K
DIG I_C
BU ZZ
ZE RO
RX D
RE MOT E
SD A
SCL
A0
1
A1
2
A2
3
GN D
4
SD A
5
SCL
6
WC
7
VCC
8
IC11 24C04
+5V
C19 104
R29
10K
R28
10K
SD A
SCL
E11
47u F/16V
R41
8.06K
C24
223
R42
2K
+5V
1
2
CN 1 4
T1_ room
T1_ room
E12
47u F/16V
R36
8.0 6K
C17
223
R27 2 K
+5V
1
2
CN 11
T2_ pipe
T2_ pipe
E10 100 uF/16V
T2_ pipe
T1_ room
SW _K EY
STE P 1
STE P 2
STE P 3
STE P 4
FA N _BA CK
IND OORFAN
+5V
E7
100 uF/16 V
C10
104
Q3
901 3
R37
12K
C22
223
D1 4 1N 4007
D1 3 1N 4007
R38
12K
R39
12K
R40 5 .1 K
+5V
ZERO
B
A
C23
223
E8
47u F/16V
C25
1.2 (1.5)u F/450V
T1 T2
G
TR1
BT131
L1
C2 333 /250VAC
R1
2K
+5V
R3
560
E2
470 uF/25 V
R4
11K /2W
DZ2
12V
D5
IN4007
R5
11K /2W
L
N
R2 51/ 1W
IND OORFAN'
1
2
CN 9
N
ZR1
14D 681K
C5
333 /250VAC
1
2
CN 2
TRANS_ IN
t
PTC1
82RM
1
2
3
4
5
CN 1
FA N_ I N
IC1 PC817
FU SE 1
3.1 5A/250V
14. 5VAC 350m A
C3
104
E1
220 0uF/2 5V
D4
D3
D2
D1
Vin
1
GN D
2
Vo ut
3
IC2 781 2
+12V
E3
100 0uF/2 5V
C4
104
IN4 007*4
Vin
1
GN D
2
Vo ut
3
IC3 780 5
+5V
E4
470 uF/16 V
C11
104
CHUCHE N
SEL E CT2
TX D
RX D
R26
2K
R25
5.1 K
R24
680
R19
100 K
R20
11K /2W
R21
11K /2W
R22
12K
R23
5.1 K
R18
5.1 K
R17
2K /2W
C15
102
C16
471 /250V
C14
102
D10
D1 1
E9
100 uF/35 V
POWER CIRCUIT
COMMUNICATE CIRCUIT
CORTROL CIRCUIT
R32
10K
+5V
+5V
SEL E CT3
+5V
Q2
901 3
SEL E CT3
R34
5.1 K
D1 5
IN4 148
C20
103
+5V
1
2
3
CN 1 3
FA N _BA CK
+12V
FA N_ BA CK
A
B
1
2
CN 10
L
IN4 007
1
CN 8
S
IN4007
J3
SEL E CT1P50
1
P51
2
P52
3
P53
4
AN I0
5
AN I1
6
AN I2
7
AN I3
8
VSS
9
P10
10
P11
11
P30
12
P31
13
P32
14
P33
15
P20
16
P21
17
P22
18
P23
19
P24
20
VP P
21
RE SE T
22
X2
23
X1
24
VD D
25
P25
26
P26
27
P00
28
P01
29
P02
30
P03
31
P04
32
IC8
uPD 7891 89(32 P)
R43
1K
IN4 749
1
23
4
2
1
1
2
4
3
C8
104
E5
100 0uF/2 5V
ISO GND
D9
D8
D7
D6
Vin
1
GN D
2
Vo ut
3
IC7 781 2
ISO +12V
E6
470 uF/25 V
C9
104
IN4 007*4
1
2
3
4
CN 5
TRANS_ OUT
R31
10K
+5V
SEL ECT 2
J2
R33
10K
+5V
SEL E CT1
J1
DISPLAY
C18
102
+5V
RE MO TE
R30 100
R14
10K
R15
10K
R16
10K
+5V
1
2
3
4
5
6
7
CN 7
DIG I_C
DA TA
CL K
LE D_C
1
2
3
CN 4
IN1
1
IN2
2
IN3
3
IN4
4
IN5
5
IN6
6
IN7
7
VSS
8
VDD
9
OU T7
10
OU T6
11
OU T5
12
OU T4
13
OU T3
14
OU T2
15
OU T1
16
IC4
IC/ ULN2003
C7
104
+12V
1
2
3
4
5
CN 8
STE P 1
STE P 2
STE P 3
STE P 4
BU ZZ
INDOORFAN
B1
R8
1K
+12V
IC5
PC817
R7
1K
R6
2K
Q1
901 3
R9
5.1 K
ISO +12V ISO GND
CHUCHE N
IND OORFAN'
1
2 CN 12
ISO +12V
1
2 CN 6
SW 1
C21
104
R35
10K
+5V
SW _K EY
1
2
4
1
14. 5VAC 200m A
C1
472
1
P-1
GND
R11
100 K
C12
104

Midea MSG-12HRIN2 Specifications

General

Brand	Midea
Model	MSG-12HRIN2
Category	Air Conditioner
Language	English