Sharp AU-A24 (serv.man12) Service Manual ▷ View online
9
AH-AP18CS
AH-AP24CS
AU-A18CS
AU-A24CS
AH-AP24CS
AU-A18CS
AU-A24CS
Figure L-3. Electronic Control Circuit Diagram for AH-AP24CS
L2
R37
13K
MODE
HOT
KEEP
SWE-
AT
WIRE
LESS
PWR
ON
DEIC
TEST
NONE
NONE
NONE
NONE
JP13
JP12
JP11
JP10
JP9
JP8
JP7
2
PIPE
1
PIPE
FAN
DRY
E 2
DEIC
E 1
NONE
JP6
COOL
HEAT
FAN1
FAN2
R23
R21
R19
ER
TER
CLUS
FAN
OUT
LOUV
JP19
NONE
15K
15K
JP18
MODE
L
R38
NONE
USE
USE
USE
USE
USE
USE
NONE
NONE
JP1
JP5
JP4
JP3
JP2
I
SYMBOL
DEF.
1/2W
R45
47
TO
OUTDOOR
UNIT
BR
E
A
BOARD
TERMINAL
2
POWER
SUPPLY
SINGLE
PHASE
N
1
TERMINAL
BOARD
N
1
3A
250V
T
WPE1
8
7
6
5
4
3
2
BCN1
1
1
2
3
C26
+
+
R33
R31
1
0.1
µ
25V
C16
SW1 : AUX.(TEST RUN)
C12
R37
C27
13K
3.3K
R17
16V
0.01
µ
16V
0.01
µ
10K
10K
JP18
JP13
JP12
JP11
JP10
10MHz
R11
47K
R12
6.8K
0.01
µ
0.01
µ
0.01
µ
16V
16V
16V
10K
R34
R32
R26
R25
R24
R23
R22
R21
R20
R19
R18
R16
R15
R14
R13
R10
R9
R8
R7
C25
C23
C21
C20
C19
C18
C17
C15
C14
C13
C11
C9
C8
C6
C5
C4
C3
C2
C1
TR1
0.01
µ
16V
25V
0.1
µ
6
7
8
3
2
1
IC8
5
4
3.3K
22.6K(F)
GND
D1?4
C7
+
100
µ
10V
25V
IC3
0.1
µ
7805
47
µ
25V
+
IC2
7812
0.1
µ
50V
1000
µ
35V
+
D7
2.7K(F)
5
3
1
2µ
MOTOR
FAN
1
2
3
4
(F)
10K
(F)
10k
10
µ
16V
16V
10
µ
10K
10K
680
+
1000p
50V
Vss
AVss
AVcc
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
51
50
49
P20
P17
P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
NC
P30
P17
P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
NC
P30
64
63
62
61
60
59
58
57
56
55
54
53
52
P44
P43
P42
P41
P40
P37
P36
P35
P34
P33
P32
P31
P64
P63
P62
P61
P60
P63
P62
P61
P60
AVR
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P47
P46
P45
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P47
P46
P45
19
18
17
16
15
14
13
12
11
10
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
Vcc
20
21
22
23
24
25
26
27
28
29
30
31
32
RST
MOD0
MOD1
X0
X1
P27
P26
P25
P24
P23
P22
P21
FRONT
OSC1
SSR1
0.01
µ
1K
JP4
JP5
16V
0.01
µ
400V
(PATTERN SIDE)
IC1
50V
1
µ
0.1
µ
25V
13K
13K
10K
3
IC6
1
MB89537A
NC
JP1
JP2
JP3
3
2
MOTOR
FAN
IC
HOLE
3
2
1
4
5
1
2
3
LOUVER
MOTOR
3
5
4
2
1
0.1
µ
25V
D6
+
10K(F)
220
µ
16V
Q1
9
8
IC5
470
1/2W
SSR1
RY4
BZ1
1.8K
R28
R29
10K
IC4
8
2
1
1
2
SW101
C24
25V
9
10
5V
12V
3
SSR2
R30
470
9
1/2W
2
R27
R4
22K
R5
1
Q2
20K
R6
22K
16V C10
0.01
µ
2
16V
C22
0.01
µ
2
1
2
3
3
2
1
2
3
D9
D8
13
CLEANING
SWITCH 2
SWITCH 1
CLEANING
10K
R39
R40
3.3K
R35
CLUSTER
1
3
2
1
CN1
CN2
CN3
CN5
CN6
CN7
CN8
INTERNAL
THERMOSTAT
CN9
NR1
1
3
1
3
JP21
Q5
Q6
Q7
Q8
6
7
1
3
5
820(F)
0.1
µ
D12
270
56
1/2W
1/2W
620
620
2
3
4
5
6
7
8
1
3
2
1
620
620
R106
R105
R104
R103
BCN101
IC101
+
10V 33
µ
25V 0.1
µ
C101
C102
1/2W
1/2W
R101
R102
2.7K
3K
LED103
LED104
LED105
LED106
(FAN AUTO)
(FAN H)
(FAN M)
(FAN L)
R107
9
65
2
43
1
(CLUSTER)
LED107
GR
BL
21
1
(OPERATION)
LED101
LED102
(TIMER)
2
3
10
R108
3
CN103
BCN102
CN102
CN10
CN101
275V
275V
0.1
µ
R2
R1
2W
2W
SSR2
6
6
8
C28
275V
0.1
µ
JP9
JP8
JP7
JP19
R38
NC
NC
NC
NC
L1
100
R41
1W
C31
0.033
µ
275V
6.8K
6.8K
NF1
D14
+
C29
47
µ
25V
10K
275V
RY4
R44
0.01
µ
C34
1W
D
NC
NC
47K
5.1K
RE
BL
CT1
BL
BL
BR
TH1 PIPE
TEMP.
10k
Ω
(25˚C)
TH2 PIPE
TEMP.
15k
Ω
(25˚C)
AH-AP18CS
AH-AP24CS
AU-A18CS
AU-A24CS
AH-AP24CS
AU-A18CS
AU-A24CS
10
igure L-4. Printed Wiring Diagram for AH-AP24CS
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL BOARD
TOP
TOP
“N”
TO TERMINAL BOARD
TOP
TOP
“N”
TO TERMINAL BOARD
BOTTOM
BOTTOM
“N”
TO TERMINAL
BOARD TOP
“2”
BOARD TOP
“2”
TO TERMINAL
BOARD TOP
“1”
BOARD TOP
“1”
FROM FAN MOTOR
FROM
FAN MOTOR
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)
11
AH-AP18CS
AH-AP24CS
AU-A18CS
AU-A24CS
AH-AP24CS
AU-A18CS
AU-A24CS
Microcomputer (IC1)
IC1 is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
IC1 is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name
Output
Function
1
P45
IN
–
2
P46
IN
HOOT KEEP
3
P47
IN
SWEAT
4
AN0
IN
ROOM TEMP.
5
AN1
IN
PIPE TEMP.
6
AN2
IN
CT
7
AN3
IN
CLUSTER SENS.
8
AN4
IN
MODEL
9
AN5
IN
LOUVER SET
10 AN6
IN
FAN SET COOL
11 AN7
IN
FAN SET HEAT
12 AVCC
IN
5V
13 AVR
IN
5V
14 AVSS
IN
0V
15 R60
IN
WIRELESS SIGNAL
16 R61
IN
AC CLOCK
17 R62
IN
SW1
18 R63
IN
WIRELESS HEDDER
19 R64
IN
POWER ON
20 RST
IN
RESET SIGNAL
21 MOD0
IN
0V
22 MOD1
IN
0V
23 X0
IN
OSILLATION
24 X1
IN
OSILLATION
25 VSS
IN
0V
26 P27
IN
–
27 P26
OUT
FAN MOTOR CONTROL
28 P25
OUT
OUTDOOR FAN M. CONTROL
29 P24
OUT
VALVE CONTROL
30 P23
OUT
COMPRESSOR CONTROL
31 P22
OUT
BUZZER
32 P21
OUT
CLUSTER GENERATOR CONTROL
Pin Terminal Input
No. Name
Output
Function
33 P20
IN
CLEANING SW1
34 P17
OUT
LOUVER MOTOR
35 P16
OUT
LOUVER MOTOR
36 P15
OUT
LOUVER MOTOR
37 P14
OUT
LOUVER MOTOR
38 P13
NC
–
39 P12
NC
–
40 P11
NC
–
41 P10
NC
–
42 P07
OUT
LED 107 (GREEN)
43 P06
OUT
LED 107 (BLUE)
44 P05
OUT
LED 101
45 P04
OUT
LED 102
46 P03
OUT
LED 103
47 P02
OUT
LED 104
48 P01
OUT
LED 105
49 P00
OUT
LED 106
50 N5
NC
–
51 P30
OUT
CLUSTER POLARITY CONTROL
52 P31
IN
DEICE 2
53 P32
IN
DRY FAN
54 P33
IN
PIPE 1
55 P34
IN
PIPE 2
56 P35
IN
INDOOR FAN MOTOR R.P.M.
57 VCC
IN
5V
58 P36
IN
CLUSTER SET
59 P37
IN
–
60 P40
IN
TEST
61 P41
IN
DEICE 1
62 P42
IN/OUT EEPROM
63 P43
IN/OUT EEPROM
64 P44
IN
OUT FAN
AH-AP18CS
AH-AP24CS
AU-A18CS
AU-A24CS
AH-AP24CS
AU-A18CS
AU-A24CS
12
FUNCTIONS
1. Temperature control characteristic
1-1
COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C5).
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C5).
2. Operation modes
2-1
COOL operation
The compressor turns on or off, at the
thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
The compressor turns on or off, at the
thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
Figure H-1
1-2
DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
Figure H-3
2-2
DRY operation
On the switch on, the compressor always starts
to operate for 2 minutes with fan speed “DL” .
The microcomputer reads the room temperature
2 minutes after this first compressor operation.
This room temperature is set as the preset
temperature automatically.
The preset temperature ranges from 18˚C to
32˚C. When the room temperature is below
18˚C, the preset temperature is set to 18˚C,
and when the room temperature is over 32˚C,
the preset temperature is set to 32˚C.
Dry operation is divided into three zones
(Cooling zone, Dehumidifying zone and
Circulating zone) by thermostat lines (D1 to
D3), and the compressor and the fan motor
are controlled in each zone as shown in Table
H-1.
On the switch on, the compressor always starts
to operate for 2 minutes with fan speed “DL” .
The microcomputer reads the room temperature
2 minutes after this first compressor operation.
This room temperature is set as the preset
temperature automatically.
The preset temperature ranges from 18˚C to
32˚C. When the room temperature is below
18˚C, the preset temperature is set to 18˚C,
and when the room temperature is over 32˚C,
the preset temperature is set to 32˚C.
Dry operation is divided into three zones
(Cooling zone, Dehumidifying zone and
Circulating zone) by thermostat lines (D1 to
D3), and the compressor and the fan motor
are controlled in each zone as shown in Table
H-1.
Figure H-2
Figure H-4
Room temperature(˚C)
Preset temperature (˚C)
18
32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Room temperature
Preset temperature
Room
temperature
transition
temperature
transition
C4
C5
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
State 2 : Compressor OFF
1
2
3
Room temperature
Preset temperature
Room
temperature
transition
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
18
32
C1
C2
C4
C3
C5
17.5
18.5
19.0
19.5
20.5
31.5
32.5
33.5
34.5
Preset temperature (˚C)
Room temperature (˚C)
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