Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 343

6. Schematic diagram and wiring diagram
6.1 Schematic diagram
1 2
IN4007*4
D1 IC1 7812
CN1 1
Vin Vout
D2
4
A
E1
3 C1
D3
2
B
104
1
D4
TRANS
2200uF/25V
D IC10 7812
D16 IN4007*4 1
Vin Vout
C D17
E10 C23
D D18 104
D19
2200uF/25V
+5V
R4 12K
+5V
1
C5
3
RST
104
2
C25
104
IC5 KIA7042 +5V
+12V
JR8
10K
R5
HEAT
1K
JR9
BUZ1
BUZ '
10K
BUZZER1
+5V
C
R38
10K
SW_TEST
R39
C22
JR1
5.1K 104
10K
SW1
SEG1
SEG2
SEG3
SEG4
CN2 +5V
R59 R60
2
10K 10K
D5
1
IN4148
+5V
T1_room
B R10 2K
T1_room
AUTO_SELECT
D6 E4 C6
R8
8.1K/1% IN4148 10uF/16V 104
CN3 +5V
2
D7
1
IN4148
T2_I.pipe
R11 2K
T2_I.pipe
D8 E5 C7
R9 +5V
8.1K/1% IN4148 10uF/16V 104
+5V
D9
1N4148
A
R12 2K R14
Current
1.4K/1% CT1
D10
C8 R13 1N4148 0057h
104 E6 16K R6
10uF/16V 1K/1%
1 2
3
+12V-a IC3 7805 +5V
3 1 3
Vin Vout
E2 C3 E3 C4
104 104
1000uF/16V 470uF/16V
+12V-b
3
E11 C24
104
1000uF/16V
GNDB
C26
IC4
104
1 42 X1
VSS0 X1
2 41 X2
VDD0 X2
FAN_IN 3 40 RST
P25 RESET
FAN_IN
BUZ 4 39
P26 XT1
BUZ
STEP_I1 5 38
P00 XT2
STEP_I1
STEP_I2 6 37
P01 Vpp/IC
STEP_I2
STEP_I3 7 36 SCL
P02 P24
STEP_I3
STEP_I4 8 35 SDA
P03 P23
STEP_I4
9 34
COMP COM1
P04 P22
COMP
10 33
COM2
VSS1 P21
11 32
HEAT
P05 VDD1
12 31
SEG1 COM3
P50 P20
30
SEG2 13 FAN_OUT
P33
P51
14 29
SEG3 FANSP
P52 P32
28
SEG4 15 ZERO
P31
P53
27
16 REC
+5V P30
AVDD
17 26 VALVE
P11
AVREF
T1 18 25 FRESH
AN10 P10
T1_room
T2 19 24
AN11 AVSS
T2_I.pipe
CURRENT 20 23
AN12 AN15
Current
AUTO_SELECT 21 22 SW
AN13 AN14
UPD789166
IC7
1 16
STEP_I1 IN1 OUT1
2 15
STEP_I2 IN2 OUT2
3 14
STEP_I3 IN3 OUT3
4 13
STEP_I4 IN4 OUT4
5 12
FAN_IN IN5 OUT5 FAN_IN '
6 11
IN6 OUT6 BUZ '
BUZ
7 10
COMP IN7 OUT7 COMP '
JR6
8 9
10K
VSS VDD
C19
R23 2K UJN2003
104
AUTO_SELECT
CN6
+12V-a
JR7 C13
1
10K 104
R25 51/1W
2
3
T2
4
C14
1.2uF/450V
5
FAN_IN
2K R24
3
4 5
R18 10K
+5V ZERO
R19 150
+5V
R16 12K
A
Q2
REC
9014
R15 R17
D11 1N4148
C9
C10
D12 1N4148 12K 12K
104
B
102
DIS1
R7 X1
WT4021BG
+5V C2
1M
IC2
4M
R1 R2 104
8 1
RST 10K 10K
VCC A0
7 2
WC A1
6 3
SCL
SCL A2
5 4
SDA
SDA GND
24C04
SCL
IC8
7 13
GND Q7
SDA C24
R44 330
104
14 12
COM1 Vcc Q6
R45 330
11
COM2 Q5
R46 330
9 10
+5V +5V MR Q4
R47 330
8 6
COM3 SEG3 CP Q3
R48 330
C16
5
Q2
FAN_OUT 102
R49 330
2 4
SEG4 Dsb Q1
FANSP_FEEDBACK
R54 330
C17
1 3
102 Dsa Q0
ZERO
R55 330
74HC164
REC +5V
VALVE
FRESH
10K
JR4
IC9
R62
JR5 10K
R61
1K
2K
JR2 10K
Q11
SW_TEST JR3 10K
+12V-a
9014
1
2 CN12
3
4
5
+12V-a
SWING
C15
333
E9
?
470uF/25V
T1
10D471K
L2
Z1 R28 R29
BT131 D15
12V 11K/2W 11K/2W
TR1
IC6 PC817
IN4007
+12V-a
R26
FAN_IN '
1K
4 5
13
6
+5V
REC1
D13
R20 1K
REC +12V-a
IN4148
V
GND R215.1K
C11 FANSP_FEEDBACK
E7
RECEIVER_V
C12
104
103 FAN_BACK
10uF/16V
COM1 COM2 COM3
+5V +5V
+5V
R41 R42 R43
2K 2K 2K
R41 R41 R41
10K 10K 10K
Q8 Q9 Q10
9012 9012 9012
Only For Heat P ump
R27
2K
LED6
LED7
LED8
LED9
R33
HEAT
2K
SW2 CN16
+12V-b 1
2
R63
Q12
5.1K
9014
PC817
+12V-b
GNDB
R34
FAN_OUT
2K
R35
VALVE
2K
L1
CN15
1
C23
ZR1
0.1uF/275VAC
2
t
TRANS_IN
N
PTC
CN14 CN11
82RM
1
1
N N
6
7 8
CN4
3
2
1
CN9
+12V-a
LOAD_HEAT N
1
D21 HEAT_N
RY2
RELAY-SPST
IN4148
N
Q3
9014
+12V-a CN10
LOAD_HEAT L
1
D22
HEAT_L
IN4148 RY3
RELAY-SPST
FUSE2
Q5
9014
10A
+12V-a CN13
LOAD_FAN OUT
1
D23
2
RY4
RELAY-SPST
IN4148
L1
Q6
9014
+12V-a
LOAD_VALVE
C20
D24
333
RY5
RELAY-SPST
IN4148
R36
Q7 51/1W
9014
L1
FUSE1
3.15A/250V
+12V-a LOAD_COMP
C21
RY6 333
COMP
COMP '
R37
51/1W
L(POWER_IN PORT)
7 8
D
C
B
A