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7.
Schematic diagram and Wiring diagram
7.1.
Schematic diagram
7.1.1 Display board
1
D
CN1
8LED
C
7
6
CLK
5
DATA
4
DIGI
FROM INDOOR PCB
3
+5V
2
REMOTE
1
GND
47u/16V
R1 102
B
R2 102
A
1
7.1..2 Indoor main PCB
1
2
CN1
1
R2 51/1W
C2
2
T1
3
L1
4
C25
1.2(1.5)uF/450V
5
D
FAN_IN
R1
2K
IN4007*4
14.5VAC 350mA
A
D1
CN5
D2
4
C3
3
104
D3
E1
2
B
1
D4
2200uF/25V
TRANS_OUT
D6
IN4007*4
14.5VAC 200mA
D7
E5
C8
D8
104
C
D9
1000uF/25V
POWER CIRCUIT
1
IC6
PC817
R18
C14
5.1K
C16
D10
2
102
471/250V
IN4007
4
IC10 PC851
R17
2K/2W
3
R20
R21
11K/2W
11K/2W
B
DZ1
C13
R19
IN4749
24V
100K
473
N
1
E9
2
100uF/35V
CN8
1
COMMUNICATE CIRCUIT
S
+5V
+5V
R33
R31
10K
10K
SELECT1
J1
J2
A
1
2
9
2
IC1
1
Dsa
2
Dsb
3
Q0
4
Q1
5
Q2
6
Q3
7
GND
74HC164
+5
+5
E2
C3
C6
R6
221
104
102
Q1
9012
R5
102
Q2
9013
R4 221
dig.1
+5
d dp e
R3 221
Q3
9012
2
3
333/250VAC
L
E2
T2
470uF/25V
C5
R4
R5
TR1
D5
DZ2
333/250VAC
11K/2W
11K/2W
N
BT131
12V
R11
C12
IN4007
100K
104
PTC1
4
1
82RM
+5V
R3
INDOORFAN'
560
IC1
PC817
3
2
IC2
7812
+12V
IC3
7805
1
3
1
3
Vin
Vout
Vin
Vout
C4
E3
E4
104
1000uF/25V
470uF/16V
IC7
7812
ISO+12V
C1
P-1
1
3
Vin
Vout
1
472
GND
E6
C9
104
470uF/25V
ISOGND
+5V
R43
4
RXD
1K
R23
+5V
3
5.1K
C15
102
R24
1
680
R22
12K
2
Q2 9013
R26
TXD
2K
CN10
D11
L
CN9
1
R25
2
IN4007
5.1K
+5V
R32
10K
SELECT3
SELECT2
FAN_BACK
J3
3
Service manual
3
4
R7
221
R8
+5
102
104
C1
14
Vcc
13
Q7
12
Q6
DISP2
11
Q5
10
Q4
9
MR
8
CP
+5
R10
151
REC1
g
a
b
f
DISP1
E4
C5
c
10u/16V
dig.2
104
3
4
4
5
CN10
FUSE1
1
L
3.15A/250V
2
ZR1
CN9
14D681K
1
N
2
1
CN2
2
TRANS_IN
+5V
CORTROL CIRCUIT
C11
104
IC8
17
TXD
P21
18
RXD
P22
19
CLK
P23
20
LED_C
P24
21
VP P
22
RST
RESET
X1
23
X2
R10
1M
2.5M
24
X1
25
+5V
VDD
26
C10
INDOORFAN
P25
E7
104
100uF/16V
27
BUZZ
P26
28
STEP1
P00
29
STEP2
P01
30
STEP3
P02
31
STEP4
P03
32
DIGI_C
P04
uPD789189(32P)
R38
A
12K R39
D14 1N4007
12K
D13 1N4007
R37
B
12K
+5V
+5V
D15
IN4148
R35
CN13
10K
3
R34
2
SW_KEY
1
5.1K
C20
103
C21
FAN_BACK
SW1
104
+12V
4
5
5
+5
Q4
9012
LED1
LED2
LED3
DEF R
TIME Y
AUTO G
Size
FCSM No.
DWG No.
B
Scale
5
6
7
IC4
CN8
1
16
STEP1
IN1
OUT1
1
2
2
15
STEP2
IN2
OUT2
3
4
3
14
STEP3
IN3
OUT3
5
4
13
STEP4
IN4
OUT4
5
12
BUZZ
IN5
OUT5
R8
6
11
INDOORFAN
IN6
OUT6
INDOORFAN'
1K
7
10
CHUCHEN
IN7
OUT7
8
9
VSS
VDD
4
IC5
C7
R7
IC/ULN2003
104
1K
R6
1
+12V
2K
16
P20
CHUCHEN
15
P33
FAN_BACK
14
RST
P32
ZERO
C26
13
104
P31
DATA
12
P30
REMOTE
11
P11
SDA
10
P10
SCL
9
VSS
8
ANI3
7
ANI2
6
ANI1
T2_pipe
5
ANI0
T1_room
4
CLK
P53
SW_KEY
3
DIGI_C
P52
SELECT3
2
REMOTE
P51
SELECT2
1
P50
SELECT1
CN4
+5V
R40 5.1K
ZERO
Q3
9013
C23
223
C22
SCL
223
SDA
CN11
+5V
CN14
2
1
T2_pipe
R27 2K
T1_room
T2_pipe
E12
C17
R36
R41
47uF/16V
223
8.06K
8.06K
6
7
6
D
C
B
A
Rev
Sheet
0 of 0
6
8
ISO+12V
1
+12V
D
2
CN12
B1
1
2
CN6
1
PC817
R9
Q1
5.1K
9013
2
ISO+12V
ISOGND
IC9 7042
2
3
1
+5V
R13
E8
10K
C
47uF/16V
+5V
R14
R15
R16
10K
10K
10K
CN7
LED_C
7
6
DATA
5
4
+5V
3
2
R30 100
1
C18
3
102
DISPLAY
2
1
B
E10 100uF/16V
+5V
C19
104
IC11 24C04
R28
R29
8
1
10K
10K
VCC
A0
7
2
WC
A1
6
3
SCL
A2
5
4
SDA
GND
+5V
2
1
R42
T1_room
2K
C24
E11
47uF/16V
223
A
8
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