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20
10. Electronic Circuit Diagram
10.1 Indoor Unit
3
2
1
TERMINAL
BOARD
GROUNDING TERMINAL
TO
OUTDOOR
UNIT
TEMP. FUSE
102ºC (3A)
Y/G
EVAPORATOR
GROUNDING TERMINAL
M
FAN MOTOR
1
4
7
BL
R
W
B
Y
Y/G
R
G301
(GRN)
AC3
(RED)
AC2
(WHT)
AC1
(BLK)
COMMUNICATION
CIRCUIT
NOISE FILTER
CIRCUIT
F
U
SE 1
01
T
3.
15A
L250V
ELECTRONIC CONTROLLER
(SUB)
CN-STM9
Green
CN-STM8
Yellow
CN-SUB
Yellow
CN-SUB
White
CN-STM7
Black
CN-TH2
Green
CN-TH1
Yellow
RECTIFICATION
CIRCUIT
M
UP & DOWN
(UP LEFT)
UP & DOWN
(DOWN LEFT)
UP & DOWN
(UP RIGHT)
AIR TEMP SENSOR
(15k 3950)
PIPE TEMP SENSOR 2
(20k 3950)
PIPE TEMP SENSOR 1
(20k 3950)
BR
R
O
Y
P
M
BR
R
O
Y
P
M
1
2
3
4
5
6
7
BR
R
O
Y
P
W
W
W
W
W
W
W
W
W
W
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
M
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
5
1
2
3
4
BR
R
O
Y
P
M
BR
R
O
Y
P
(LEFT & RIGHT)
(UP & DOWN)
(DOWN RIGHT)
1
2
3
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
1
2
W
W
W
W
W
W
W
W
W
W
W
W
W
CN-CNT
5V
CN
-F
M
(W
H
T
)
CN-STM2
Red
CN-STM1
Green
VA1
U
G
BL
W
CN-DISP2
Red
CN-SW2
CN-SW1
CN-DISP1
White
ELECTRONIC CONTROLLER
(DISPLAY)
ELECTRONIC CONTROLLER
(EMERGENCY SWITCH)
EMERGENCY OPERATION
BUTTON
SW401
ELECTRONIC CONTROLLER
(MAIN)
t°
t°
t°
1
5V
L351
L350
14V
F350
32V
R350
10k
R353
10k
C351
1000p
50V
C350
1000p
50V
C352
C353
5V
R28
15k
1%
*C11
*C12
*C406
R29
20k
1%
R404
20k
1%
14V
14
V
1 IC6
2 IC6
3 IC6
4 IC6
4 IC5
5 IC5
6 IC5
7 IC5
10
11
12
13
16
15
14
13
*C8
R49
10k
5V
5V
SW401
5V
R248
10
1/4W
C24
0.01u
50V
14V
5V
R116
270
*C67
IC5
16
C407
1000p
50V
R265
R264
270
1/8W
360 1/8W
*R236
*R212
R211
1.5k 1/4W
*R204
A
K
R203
LED201
Green
LED204
Green
LED202
Orange
*R215
75k
*LED205
*R214
R213
0
G5
R210 1k
1 2
14V_2
5V_2
14V_2
5V
14V_2
A
K
A
K
A
K
A
K
5V
5V_2
14V_2
5V
*SEN201
C
E
*R205
*R201
R271 1k
R272 1k
5V
14V
R22 10k
R180
510
3
4
5
6
2
1
1
2
2
3
3
4
4
5
5
1
2
3
4
5
C505
1000p
50V
C504
1000p
50V
C507
1000p
50V
C506
0.01u
50V
G3
5V 14V
14V
G3
C
B 4.7k
10k
E
C501
0.1u
25V
ON
OFF
SET
TIMER
CANCEL
TEMP
AIR SWING
OFF/ON
MODE
FAN SPEED
AIR CONDITIONER
IC502
IC504
*Q502
1
2
3
4
1
LED203
Blue
0
10
20
30
40
50
60
70
Temperature(°C)
R
e
sist
a
n
c
e
(
k
Ω)
Sensor (Thermistor)
Characteristics
Pipe temp. Sensor
Intake Air Temp. Sensor
-10
10
20
30
40
50
0
REMOTE CONTROLLER