Sharp AY-M09AE User manual

1
AY-M09AE
AE-M18AE
SHARP CORPORATION
MULTI SPLIT SYSTEM
ROOM AIR CONDITIONERS
INDOOR UNIT
AY-M09AE
MODEL
TABLE OF CONTENTS
Page
SPECIAFICATIONS ............................................................................................................................................................. 2
EXTERNAL DIMENSIONS................................................................................................................................................... 3
WIRING DIAGRAMS............................................................................................................................................................ 5
ELECTRICAL PARTS .......................................................................................................................................................... 6
MICROCOMPUTER CONTROL SYSTEM .......................................................................................................................... 7
PRINTED WIRING BOARD ................................................................................................................................................. 9
FUNCTIONS ...................................................................................................................................................................... 13
TROUBLESHOOTING OF THE CONTROL CIRCUIT...................................................................................................... 21
REFRIGERATON CYCLE.................................................................................................................................................. 24
PERFORMANCE CURVES ............................................................................................................................................... 26
REFRIGERANT PIPE INSTALLATION WORKS ............................................................................................................... 27
DISASSEMBLING PROCEDURE ...................................................................................................................................... 28
PUMP DOWN..................................................................................................................................................................... 33
REPLACEMENT PARTS LIST........................................................................................................................................... 34
AE-M18AE
OUTDOOR UNIT
Intheinterestsofuser-safety(Requiredbysafetyregulationsinsome
countries) thesetshouldberestoredtoitsoriginalconditionand only
parts identical to those specified should be used.
(2 UNITS)
SERVICE MANUALS2004AYM09AE/

2
AY-M09AE
AE-M18AE
ITEMS INDOOR UNIT OUTDOOR UNIT
AY-M09AE AE-M18AE
Cooling capacity kW [1 unit] 2.7 [2 units] 2.5 x 2
Heatpump kW [1 unit] 3.3 [2 units] 3.2 x 2
Heating capacity
Moisture removal Liters/h 1.1 x 2
Electrical data
Phase - Single
Rated frequency Hz 50
Rated voltage range V 198 to 264
Rated voltage V 220 - 240
Rated current Cool A [1 unit] 4.8 - 5.1 [2 units] 9.6 - 9.8
Heat A [1 unit] 5.2 - 5.5 [2 units] 9.2 - 9.5
Rated input Cool W [1 unit] 1000 - 1080 [2 units] 2000 - 2100
Heat W [1 unit] 1080 - 1170 [2 units] 1920 - 2060
Power factor Cool % [1 unit] 95 - 88 [2 units] 95 - 89
Heat % [1 unit] 94 - 89 [2 units] 95 - 90
Compressor Type Hermetically sealed rotary type
Model 2PS192D3AA02
Oil charge 350cc (SUNISO 4GDID)
Refrigerant Evaporator Louver fin and Grooved tube type(7mm tube)
system Condenser Corrugate Fin and Grooved tube type
Control Capillary tube
Refrigerant volume 680 g x 2
De-ice system Micro computer controlled reverse system
NOise level High dB(A) 38 50
(at cooling) Med. dB(A) 31 -
Low dB(A) 28 -
Fan system
Drive Direct drive Direct drive
Air flow quantity High m3/min. 6.5 36
(at cooling) Med. m3/min. 5.2 -
Low m3/min. 4.5 -
Fan Cross flow fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 3/8", 1/4"
Refrigerant pipe sets No. AZ-24H5E; 5m, AZ-24H7E; 7m
Drain piping mm O.D ø 18
Others
Safety device Compressor: Overload protector(MRA98533)
Fan motors: Thermal fuse Thermal Protector
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 790 890
Height mm 270 637
Depth mm 155 297
Net weight kg 7 61
Note: The condition of (
) marked item are ‘ISO 5151 : 1994(E), Condition T1'
SPECIFICATIONS

3
AY-M09AE
AE-M18AE
EXTERNAL DIMENSIONS
Figure E-1. INDOOR UNIT
Figure E-2. OUTDOOR UNIT
Remote control
58 19.5
182
Length unit (mm)
270
790 155
27
275
617
20
70
135
210
275
637
945 297
890 260
55
590 150

4
AY-M09AE
AE-M18AE
PART NAMES
INDOOR UNIT 1Inlet (Air)
2Open Panel
3Operation panel
4Air Filters
5Indicator Panel
6Vertical Adjustment
Louvres
7Horizontal Adjustment
Louvres
8Outlet (Air)
9Remote Control
To open the open panel, hold the bot-
tom corners of the open panel and
gently pull the panel outwards.
0TEST RUN Button
qAUX. Button
wRECEIVER Window
eOPERATION Lamp (Red
)
rTIMER Lamp (Yellow )
tBUSY Lamp (red )
Blinks when the unit can not
operate due to the other unit
operating in different mode.
OUTDOOR UNIT
yInlet (Air)
uRefrigerant Tube and
Interconnecting Cord
iDrainage Hose
oOutlet (Air)











TEST
RUN AUX.










TEST
RUN AUX.
0
q
w
e
r
t
y
u
i
o
1
2
3
4
5
6
7
8
9

5
AY-M09AE
AE-M18AE
Figure W-2. Wiring Diagram for AE-M18AE
Figure W-1. Wiring Diagram for AY-M09AE
WIRING DIAGRAMS
N
LN
L
SS
OUTDOOR
UNIT
INDOOR UNIT
TERMINAL 
BOARD
G(Y)
UNIT TO UNIT CORD
TERMINAL BOARD
BR
BL
RE
G(Y)
EVAPORATOR
BK
BL
BR
GR
G(Y)
RE
WH
OR
: BLACK
: BLUE
: BROWN
: GRAY
: GREEN YELLOW
: RED
: WHITE
: ORANGE
3A 250V
WPE
CONTROL BOARD UNIT 1
TRIAC
SERIAL
SIGNAL
CIRCUIT
CN1
NR
VARISTOR
(A) (B) RE
FAN MOTOR
BK
R.P.M
SIGNAL
BL
BL
GR
BL
FAN MOTOR
CAPACITOR
400V 1µF
CONTROL 
BOARD 
UNIT 2
CN3
CN5
CN4CN6
CN7
BCN 2
CN 201
CN101
THERMISTOR
(ROOM TEMP.)
THERMISTOR
(PIPE TEMP.)
TH1
TH2
RECEIVER
& LED UNIT
SWITCH
UNIT
5
7
1
2
CN2
RE
RE
BCN1
THERMAL FUSE
TRANSFORMER
WH
WH
1
2
3
4
5
6
LOUVER
MOTOR
531
THERMAL
FUSE
(E)
(F)
TRANFORMER
THERMAL 
FUSE
CN2 RY3 CN1 CN3 CN4
RY4
FAN MOTOR 
CAPACITOR
440V 2µF
BL RE
BK RE RE RERE
A1 A2
NR1
VARISTOR
WH
WH
FAN
MOTOR
RE
SIGNAL
CIRCUIT
CONTROL BOARD UNIT
CN6
CN5
OR Y
MOTOR
PROTECTOR
CT1
BK
C
R
RE
OR 370V
25µF
370V
25µF
WH
RUNNING 
CAPACITOR
RUNNING 
CAPACITOR
COMPRESSOR
MOTOR A1
BK RY1 BK
MOTOR
PROTECTOR
C
R
RE
COMP-
RESSOR MOTOR
A2 BL
CT2
AC RY2 COMP
GR
OUTDOOR UNIT GR
WH
OR
G(Y)
: GRAY
: WHITE
: ORANGE
: GREEN-
YELLOW
RE
BL
BK
Y
: RED
: BLUE
: BLACK
: YELLOW
UNIT TO UNIT CORD
INDOOR 
UNIT A2
INDOOR 
UNIT A1
BL
BL
OR
RE
G(Y) Y
250V 3A T1
WPE
TERMINAL 
BOARD
RE
G(Y)
SURGE ABSORBER
NR2 VARISTOR
RE RE
2 1 7 5 2 3 4
THERMAL
PROTECTOR
VALVE COIL
THERMISTOR 
A1 THERMISTOR
A2
(PIPE TEMP.)(PIPE TEMP.)
TH1 TH2
OR
Y
RE
BK WH BK
S
L
N
S
L
S
N
L
N
L
N
S
L
N
S
1 3 5 1 1 33
1 2
1
S

6
AY-M09AE
AE-M18AE
ELECTRICAL PARTS
For Model AY-M09AE and AE-M18AE
DESCRIPTION MODEL REMARKS SITE
Compressor 2PS192D3AA02 220 - 240V, 50Hz, 900W AE
Indoor fan motor ML-A411 220 - 240V, 50Hz AY
Outdoor fan motor ML-A868 220 - 240V, 50Hz AE
Indoor fan motor capacitor - 400V, 1µF AY
Outdoor fan motor capacitor - 440V, 2µF AE
Running capacitor - 370V, 25µF AE
Transformer - Primary; AC 220V, 50Hz AY
Secondary; AC14.8V, 50Hz
Fuse - 250V, 3A AY, AE
Reverse valve coil - 220 - 240V, 50/60Hz AE
MICROCOMPUTER
CONTROL SYSTEM

7
AY-M09AE
AE-M18AE
Figure L-1. Electronic Control Circuit Diagram for AY-M09AE
MICROCOMPUTER
CONTROL SYSTEM
33
1 3 2 6 5 4
1 3 2 6 5 4
3 2 1
6 5 4 3 2 1
1 2 3 4 5
3 2 1
3 2 1
2 2
6 BCN2
BCN1
R35 100k
R37 3.3k
C13 250V 0.01µ0.047µ
D7 TC 1A 115˚C
R50 1W  2.7k
(C6)
Y/G
F
E
BROWN
RED
BL
CN2
THERMAL  FUSE
C14 C15
ZD1
100µ
50V50V
PC2 PC1
4
5
2
1
5
4
2
1
R36 56k
6
1 3
15
2
7
1 3
L
N
S
135
1 2 3 4
8 7 6 5
IC6
5 5 7 7
88
FAN MOTOR
RPM SIGNAL
50Hz 220-240V
TERMINAL
BOARD 1
WPE 3A 250V
5V
1/2W 5.1k x 12
R45
R3 22k
R47
TRANS- FORMER
R49 D6
CN2
R44R46R48
R43R41R39
R42R40R38
(PREHEAT) WIRELESS RPM (DEICE A) (DEICE B)
(DEICE B) (FILTER) (DEICE A)
SWEAT OFF WIDTH POWER MEMORY
(JP1) ON (JP2) NORMAL JP3 1 PLUSE (JP5) (JP4) (JP6) OFF (JP7) 3 min. JP8 OFF (JP9) ON
R32 10k
R4 3.3k
C17 25V 0.1µ
IN OUT
GND
IN OUT
C6
BL
B
A
C5
C4C3
50V 0.1µ
BCN1
D1
DV
SS
D4
R2 22k
C1 250VAC 0.1µ
L6
G
D3
D2 (A170)
C2 2200µ 36V
BCN2 47µ
25V 0.1µ
50V 100µ
10V
GND
5V
5V
CN1
12V
IC2 IC3
NR
R1
1W 390Ω
TRIAC
T2 T1 FAN MOTOR
THERMAL FUSE
FAN  MOTOR CAPACITOR 400V 1µ
NC NC NC
NC NC
NC NC NC NC
AUX
TEST RUN
LOUVER  MOTOR
SW201 CN201 CN7
CN3
BCN1
BCN1
R6
1
2
R5 2.7k
PT
470Ω1/2W
BCN2
BCN2
SW202
5V
5V
12V 12V
1
1
2 3 4 5 5 4 3 2
1
9
6 5 4 3 2
7
9Q1
12
3
C8 16V 0.01µ
R7 10k
16
BZ
IC4
11 12 13 14 15 10
5V
RCM 10kΩ 10kΩ: 1000pF x 2
RA1 10kΩx 4
R34
C12 1000p 50V
R33 4.7k
470ΩOUT IN
JP10
(FILTER)
DRY ON
1000p x 4 R51 680Ω
680Ω
330Ω
R13 R14
LED 102 (YELLOW) TIMER LED
RECEIVER UNIT
LED 101 (RED) OPERATION LED LED 103 (RED) BUSY LED
CN6 CN101
CN5
D5
PST591D
C9 0.1µ 50V
C101 33µ 10V
1.2k R25
R27 4.7k
R15 10k
R26 R23 33k R24 680Ω
4.7k
12V
5V
5V
5V
5V
5V
5V
15.0k(F)R8 32.4k(F)
107k(F)
78.7k(F)
R9
R11
JP15
R10
RA2 22k(F) x 6
2 3
FAN H
C7 0.1µ 50V
FAN M FAN L MODEL A MODEL B
4 5 61
1001 0110 0011 (11111)
R16 10k
R20 240k
R20 10k
10k 10k
CA1
CA2
3
2
1
45
R21 R22
1000p x 4
8.0M OSC
3
2
1
4 5
C10 10µ 16V
R17 15k (F)
C11 10µ 16V
R18 15k (F)
R19 10k CN4
PIPE TEMP. TH2 15k (25˚C) ROOM TEMP. TH2 15k (25˚C)
TEST
5V
IC5
4 4
5V
1 64P20 AV 2 63P21 AV 3 62P22 AN17 4 61P23 AN16 5 60P24 AN15 6 59P25 AN14 7 58P26 AN13 8 57P27 AN12 9 56P30 AN11
10 55P31 AN10 11 54P32 AV 12 53P33 P04 13 52P34 XT2 14 51P35 IC 15 50BUZ X1 16 49P37
µPD78012
X2
17 48V 18 47P40 P03 19 46P41 INTP2 20 45P42 INTP1 21 44P43 INTP0 22 43P44 /RESET 23 42P45 P67 24 41P46 P66 25 40P47 P65 26 39P50 P64 27 38P51 P63 28 37P52 P62 29 36P53 P61 30 35P54 P60 31 34P55 P57
SS
VSS
P56
REF DD SS
DD
32
+
V

8
AY-M09AE
AE-M18AE
Figure L-2. Electronic Control Circuit Diagram for AE-M18AE
1 64
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33P56VSS
P55 P54 P53 IC1 P52 P51 P50 P47 P46 P45 P44 P43 P42 P41 P40 VSS P37 P36 P35 P34 P33 P32 P31 P27 P30 P26 P25 P24 P23 P22 P21 P20
P57 P60 P61 P62 P63 P64 P65 P66 P67
RESET P01 P00 P02 P03 P04 VDD X2 X1 IC XT2 AN10 AVSS AN11 AN12 AN13 AN14 AN15 AN17 AN16 AVDD AVREF
2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 25 27 28 29 30 31 32
µP078011
10Ry1
Ry2 Ry3 Ry4
7
11 6 12 5 13 4 14 3 15 2 16 1
IC2
8 9
12V 12V
VALVE COIL
FAN MOTOR
COIL A2 COIL A1
NC NC NC NC NC NC NC
NC NC NC
NC NC NC NC NC NC NC NC NC NC NC
NC NC NC NC NC NC NC
5V
C28
0.1µ 25V 10V
100µ
C22
+
_
18k
10k 8.87kF
8.87kF
R14
R7 R8
5V
BLUE RED
ORANGE
BLUE BLUE RED RED
L
YELLOW
GREEN/ YELLOW GREEN/ YELLOW
GREEN/ YELLOW
TERNINAL
BOARD
N N N
L
S S
L
CN5
2 1
VALVE COIL A1 VALVE COIL A2
1 3 1 3
RED
CN1
CN3 CN4
BLACK BLUE
FAN  MOTOR
CNR2
Ry3
Ry4
THERMAL PROTECTOR
NR1
C2
0.01µ
250V
TRANSFORMER
THERMAL
FUSE
5V 12V
INOUT GND INOUT GND
C6
C7 C5 C4 C3
CN2
25V 47µ
10V 47µ25V
0.1µ0.22µ
50V
2200µ 35V
+ _
+ _
+ _
D1 D2 D4 D3
IC4 IC3 5V
R30
1.0kF
10V 220µ
C21
R29
6.49kF
CT2
A2 A1
D8
R27
10V 220µ
D7
C20
R26
5V
ORANGE YELLOW
TC 115˚C 1Ω
TH1
PIPE TEMP. A1
TH2
PIPE TEMP. A2
4 3 2 1
CN6
C17 C18 10µ 16V 10µ 16V
R23
R22
R24
R25
6.8kF
10k
6.8kF
10k
C16
1000P
50V
C18
1000P
50V
C15 10V 100µ
C14
25V
0.1µ
5V
OSC 8MHz
2
31
R12
4.7k
5 4
2 1
1
23.3k
4 5PC2
PC1 0.01µ
16V 0.01µ 16V
D5 R5
C9 C12R17
R9
1W 2.7k 1W 2.7k
CNR4
UNIT TO UNIT SIGNAL A1 UNIT TO UNIT SIGNAL A2
CN5
CNR5
R6D6 2
1
5
5
42
2
1
1
4
PC4 PC3
5V
56k
R18
25V 0.1µ
1 3 2
IC5
Reset PST 993D
C13
5V
D11
C12 1µ 50V
C10
50V
1000P
R19
470Ω
470Ω
R11
R20 4.7k R10
56k 5V
C25
1000P
50V
C24 1000P 50V
R16 10k R15 10k
5V CT1
R28
R31
1.8kF 1.8kF
1
FAN MOTOR CAPACITOR 440V 2µF
C7
CNR1
SA1CN2 NR2
2 1
3A 250V
WPE
RED
T1
AC 220/240V 50Hz
UNIT A1 UNIT A2
RED
370V
25µ
WHITE S
C
R
COMPRESSOR MOTOR A1
BLACK
BLACK
RY1
MOTOR PROTECTOR A1
CT1
YELLOW
370V
25µ
WHITE S
C
R
COMPRESSOR MOTOR A2
PURPLE
BLUE
RY2
MOTOR PROTECTOR A2
CT2
5V
R4
10k
5V
R34 10k
5V
LED3 LED2 LED1
(RED)
SIGNAL A2 (RED) SIGNAL A1 (RED)
R3 1k R2 1k R1 1k
+
_
+
_
+
_
5
7
+ _ + _
3 5
6.49kF
C8
50V
1000P
1.0kF
D9 D10
R13
3.3k

9
AY-M09AE
AE-M18AE
Figure L-2. Printed Wiring Board for AY-M09AE
GND
D4
D3 D1 D2
R36
R37 D7
34
4
C2
3
115˚C
R1
L
R50
RED
S (F)
TC
R47 (C16)
R46R40
C15
R42 R43 R44 R45 R48 R49
D6
NR
C1
1
GT1
T2
TRIAC
3
PC1
6
BROWN
(E)
3A 250V
WPE
4
1
PT
3
BCN1
R2
R6
1 8
R3
PC2
C13
FAN MOTORCN1
5
C14
FAN MOTOR
CAPACITOR
FAN MOTOR
CAPACITOR
(B)GRAY
BLUE (A)
R38
R35
1 2
CN2
5
TRANSFORMER
7
ZD1 R39 R41
QPWBFB339JBZZ(C) 0
DPWBFA187JBKZ
(P)
YM09
FROM  FAN MOTOR
FROM  TRANSFORMER
TO  FAN MOTOR CAPACITOR
TO  FAN MOTOR CAPACITOR TO  TERMINAL  BOARD " L " TO  TERMINAL  BOARD " S "
R10
R8
C17
JP11
(JP1)
(JP2)
(JP4)
(JP5)
(JP6)
(JP7)
C12 C7 R7
JP10 Q1 3
1
JP12
JP18 OUT IN
IC3
IC5
R51
R14
R13
R27
R5
C8
R34
R26
R23
R24
JP20
C9
33
JP17 BZ
OUT
JP21
IN
IC2
CN5
RPM SIGNAL
THERMISTOR
CN4
13
D5
R15
BCN2
CN7
31
CN6
1
R25
6 1
6
C5 8
JP22
C6
1
8 9
1 165
LOUVER MOTOR
1CN3
IC4
354045
CA2
5055
OSC
CA1
RA2
JP13
JP14
6064
323025
RA1 IC1
JP8
(JP9) RCM
201510
5
15
8
31
R33
JP16
JP3
R4
132
R17
C3
JP19
C4
R28
R20
R21
R16
R22
JP15
R11
C11 C10
R18
R19
R9
YM09
FAN M
POWER ON QPWBFB339JBZZ(C) 0
FAN M
FAN M
GND 5V
12V
FROM  LOUVER  MOTOR
FROM  RECEIVER & LED UNIT FROM  SWITCH UNIT
FROM  FAN MOTOR
FROM  THERMISTOR

10
AY-M09AE
AE-M18AE
Figure L-3. Printed Wiring Board for AE-M18AE
12V
5V
GND
DIP
AEM18AE
C1
CNR1
CNR2
CN2 (TRANSFORMER)
IC4
IC3
O G I
O
GI
NR1
71
CN1 (FAN MOTOR)
1 5
A2
RY2
A1
RY1
COMP
COMP AC
AC
JP3
1
C23
C22
C25 C14
D11
JP2
JP1
C12
PC4 PC3
C13
D6
TC1
115˚C
PC2
PC1
61
3
4
6 1
1 6
3
4
6
1
33
111 111 111 111
D5
3
4
CNR4
CNR5
JP7
IC5
1
13
3
OSC
C15
C24
C17
C19
R8
R44
R31
D10
JP11
D9
R13
R7
JP9
D7
R27
CT2
CT1
A2
A1
(BLUE)
(BLACK)
R29
C16
R22
R25 R24
C18
CN5
UNIT TO UNIT SIGNAL
A1 A2
112
R15
41 R16
R23
R26
PEAK IN A2
PEAK IN A1
CN6(THERMISTOR)
R30
R28
C21
C20
D8
IC1 8 9
1 16
JP10
R4
R34 RY4
LED2 LED3
R1 R2 R3
LED1
A2 A1
IC2
RY3
510 15
60 55 50
20
JP4 JP5
TEST
25 30
D3
D4
C7
C6
C5
C8
R12
R20
R19
C10
JP8
R18
R6
R5
D2
C3
C4
JP6
R9
R14
R10
R11
C11
C9
D1
45 40 36
DPWBFA174JBKZ
QPWBFB3374JBZZ 0
H.S.
A1 A2
WPE
3A 250V
CN4
1 3
C2
CN3
1 3
(VALVE COIL)
(RED) T1
(GREEN/ YELLOW)
SA1
NR2
5V
FROM
TERMINAL "S"
FROM
THERMISTOR
THROUGH CT1
TO COMP. 
PROTECTOR A1
THROUGH CT2
TO 
COMP. 
PROTECTOR A2 TO
CONTROL 
BOARD
FROM
TERMINAL
UNIT A1 " L "
FROM
TRANSFORMER
FROM
VALVE 
COIL A2
FROM
VALVE 
COIL A1
FROM
FAN 
MOTOR
FROM
TERMINAL
UNIT A1 " N "

11
AY-M09AE
AE-M18AE
Pin Terminal Input
No. Name Output Function
33 P56 OUT Serial signal Output
34 P57 OUT Serial signal Input
35 P60 IN Dry ON select
36 P61 OUT LED(Busy)
37 P62 OUT LED(Timer)
38 P63 OUT LED(Operation)
39 P64 OUT –
40 P65 OUT –
41 P66 OUT –
42 P67 OUT –
43 RESET IN Microcomputer reset input
44 INTP0 IN R.P.M signal input
45 INTP1 IN AC clock input
46 INTP2 IN Remote control signal
47 P03 OUT –
48 VDD – Power supply(5V)
49 X2 – Internal oscillation of the
microcomputer
50 X1 – Internal oscillation of the
microcomputer
51 IC – GND
52 XT2 – –
53 P04 IN Test mode
54 AVSS – GND
55 ANI0 IN Room temp. thermistor signal
56 ANI1 IN Pipe temp. thermistor signal
57 ANI2 IN –
58 ANI3 IN Model B select
59 ANI4 IN Model A select
60 ANI5 IN FAN L select
61 ANI6 IN FAN M select
62 ANI7 IN FAN H select
63 AVSS – 5V
64 AVREF – 5V
Microcomputer (IC1) for INDOOR UNIT
The microcomputer is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name Output Function
1 P20 IN 5V
2 P21 OUT –
3 P22 OUT E2PROM(IC6) clock Output
4 P23 IN/OUT Date transmition signal
5 P24 OUT –
6 P25 OUT –
7 P26 OUT –
8 P27 IN Preheat select
9 P30 IN Wireless select
10 P31 IN RPM select
11 P32 IN –
12 P33 IN –
13 P34 IN Sweat select
14 P35 IN –
15 BUZ OUT Buzzer signal
16 P37 OUT –
17 VSS – Power supply(0V)
18 P40 IN Power on start
19 P41 IN Auto restart
20 P42 IN –
21 P43 IN –
22 P44 IN Key in signal(AUX.)
23 P45 IN Key in signal(TEST RUN)
24 P46 IN GND
25 P47 IN GND
26 P50 OUT Louver motor control
27 P51 OUT Louver motor control
28 P52 OUT Louver motor control
29 P53 OUT Louver motor control
30 P54 OUT Indoor fan motor control
31 P55 OUT –
32 VSS – Power supply(0V)

12
AY-M09AE
AE-M18AE
Pin Terminal Input
No. Name Output Function
33 P56 OUT –
34 P57 OUT –
35 P60 IN Serial signal input(A1)
36 P61 OUT Serial signal output(A1)
37 P62 IN Serial signal input(A2)
38 P63 OUT Serial signal output(A2)
39 P64 OUT –
40 P65 OUT –
41 P66 OUT –
42 P67 OUT –
43 RESET – Microcomputer reset input
44 P00 IN GND
45 P01 OUT –
46 P02 OUT –
47 P03 OUT –
48 VDD – Power supply(5V)
49 X2 – Internal oscillation
50 X1 – Internal oscillation
51 IC – GND
52 XT2 – –
53 P04 IN GND
54 AVSS – GND
55 ANI0 IN Pipe temp. thermistor(A1)
56 ANI1 IN Pipe temp. thermistor(A2)
57 ANI2 IN GND
58 ANI3 IN Current(A1)
59 ANI4 IN Current(A2)
60 ANI5 IN Revised resistance(A1)
61 ANI6 IN Revised resistance(A2)
62 ANI7 IN GND
63 AVSS – 5V
64 AVREF – 5V
Microcomputer (IC1) for OUTDOOR UNIT
The microcomputer is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name Output Function
1 P20 OUT Compressor relay (A1)
2 P21 OUT Compressor relay (A2)
3 P22 OUT Outdoor motor fan relay
4 P23 OUT –
5 P24 OUT –
6 P25 OUT Valve coil
7 P26 OUT –
8 P27 OUT –
9 P30 OUT –
10 P31 OUT –
11 P32 OUT –
12 P33 IN –
13 P34 IN Test1 input
14 P35 OUT –
15 BUZ OUT –
16 P37 OUT –
17 VSS – Power supply(0V)
18 P40 OUT –
19 P41 OUT –
20 P42 OUT –
21 P43 OUT –
22 P44 OUT –
23 P45 OUT –
24 P46 OUT –
25 P47 OUT –
26 P50 OUT –
27 P51 OUT –
28 P52 OUT –
29 P53 OUT LED(error)
30 P54 OUT LED(serial A2)
31 P55 OUT LED(serial A1)
32 VSS – Power supply(0V)

13
AY-M09AE
AE-M18AE
FUNCTIONS
1. Temperature control characteristic
1-1 COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C4).
1-3 HEAT operation
In the “HEAT” mode, the thermostat circuit
is controlled by six thermostat lines (H01 thru
H4).
Figure Y-1
1-2 DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
Figure Y-3
2. Operation modes
The indoor fan motor is controlled in the indoor unit,
and the outdoor fan motor, compressor, and reverse
valve are controlled in the outdoor fan motor.
The operation mode of the outdoor unit is basically
decided by the indoor operation mode.
Whentheoutdoor unitoperationmodeisheat,andthe
indoorunitoperationmodeiscoolordry,ortheoutdoor
unitoperation isheat, theBusy -LEDintheindoorunit
flikers. When the operation mode of the indoor
unit(called"A1", "A2")changes, theopeartion modeof
the outdoor unit changes in Table Y-1.
Figure Y-2
18 32
C1
C2
C3
C4
17.5
18.5
19.5
20.5
31.5
32.5
33.5
34.5
Preset temperature (˚C)
Room temperature (˚C)
Room temperature(˚C)
Preset temperature (˚C)
18 32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Preset temperature (˚C)
H4
H3
H2
H1
H02
H01
17
19
21
22
24
26
31
33
35
36
38
40
18 32
Room temperature(˚C)

14
AY-M09AE
AE-M18AE
2-2 DRY operation
On the switch on, the compressor always starts
to operate for 2 minutes with fan speed “D”
(slower than “UL”).
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 Y-2.
Table Y-1
Room temperature (˚C)
Preset temperature (˚C)
Room 
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
Figure Y-5
Table Y-2
Figure Y-6
Room temperature (˚C)
Preset temperature (˚C)
Room
temperature
transition
States 1 & 3 : Compressor ON
States 2 : Compressor OFF
H1
H2
3
1
2
2-3 Heat operation
The compressor turns on or off, at State 2 ,
turns on continuously at State 1 & 3 .
Compressor Fan speed
Cooling zone ON "UL"
Dehumidifying
zone ON "D"
Circulating
zone OFF "D" or "OFF"
Present mode
Indoor unit
A1 A2 A1 A2
OFFOFF OFF OFF HEAT HEAT
COOL COOL
DRY DRY
FAN
ONLY FAN ONLY
HEAT
or 
OFF
HEAT HEAT HEAT HEAT HEAT
COOL
DRY
FAN
ONLY
COOL
or
OFF
COOL COOL COOL HEAT COOL
COOL
DRY
FAN
ONLY
DRY
or 
OFF
DRY DRY DRY HEAT DRY
COOL
DRY
FAN
ONLY
FAN
ONLY
or 
OFF
FAN
ONLY FAN ONLY FAN ONLY HEAT HEAT
COOL COOL
DRY DRY
FAN
ONLY FAN ONLY
Indoor unit Outdoor 
unit
Outdoor 
unit
New mode
The busy : LED of the indoor unit flickers.
2-1 COOL operation
Thecompressor turnsonor off,at thethermostatlines
C3 and C4. The outdoor fan motor is also controlled
with the compressor.
Figure Y-4
Room temperature (˚C)
Preset temperature (˚C)
Room 
temperature
transition
C3
C4
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
3

15
AY-M09AE
AE-M18AE
2-4 Fan only operation
The indoor fan motor always turns on.
3. Fan speed
Fan speeds are given by the indoor fan motor,
"H", “M”, “L” and “UL” which are available in the
following operation mode.
Table Y-3
HEAT COOL
HIGH
FAN Switch H M
LOW
SOFT M LL UL
FAN ONLY
M
L
UL
4. Hot-Keep
Thisfunctionautomaticallycontrolstheon-offoperation
of the indoor fan motor in accordance with the on-off
operation of the compressor during the heating
operation, thereby preventing the air conditioner from
delivering a cold air when the compressor is off.
When the room temperature exceeds the thermostat
line “H1”, the compressor is turned off, and the indoor
fan motor is turned off after rotating at “UL” for 30
seconds.
3 minutes after turning off the compressor, the
compressor is turned on for 3 minutes. (below
thermostat line H01). While over H01, the compressor
is off.
At 10 seconds after turning on the compressor, the
indoor fan motor is turned on.
ThenextcompressorOFFtimeisfor3,8or15minutes
accordingtotheroomtemperature(thetimeincreases
with a rise of room temperature) when 3 minutes
elapseafterturningonthecompessor(thecompressor
is off when compressor OFF time is 15 minutes).
5. Preheat air flow
Figure Y-7
Thisfunctionis intended topreventcold air frombeing
discharged when the heating operation starts or when
defrosting.
Whentheindoorpipetemperatureisbelow29˚Catthe
begining of the heat operation or after defrosting, the
indoor fan motor stays.
When the indoor pipe temperature gets higher than
29˚C, the fan motor is turned on at speed “UL” after
compensation of starting.
When the indoor pipe temperature exceeds 35˚C, the
specified fan speed is restored. When the indoor pipe
temperature falls below 30˚C, the fan speed shifts
down to “UL”. And, when the indoor pipe temperature
falls below 24˚C, the fan motor turns off. Then, over
29˚C , it turns on again at speed “UL”.
Pipe temperature(˚C)
24
29
30
35
OFF UL UL UL
OFFPreset
Fan speed
Figure Y-8
6. Overheating protection system
Whenoverloadingoccursduringtheheatingoperation,
thissystemcontrolstheoutdoorfanmotoraccordingto
theindoorpipetemperaturetopreventtheoverloading
ofthecompressorandrestraintheriseinhighpressure.
When the indoor pipe temperature exceeds 53˚C, the
outdoor fan motor is turned off, and when the indoor
pipe temperature falls 48˚C, the outdoor fan motor
turns on.
If 3 minutes elapse after turning off outdoor fan motor,
the outdoor fan motor is turned on, when the indoor
pipe falls 53˚C.
OFF OFF
ON
ON
53˚C
48˚C
53˚C
48˚C
In the case of turn off
time is within 3 minutes In the case of turn off time is over 3 minutes
Figure Y-8
Compressor ON
OFF
Indoor
fan motor 30sec.
time
UL
ON
OFF
3 min.
(Notes)
3 min.
10sec.
UL
30sec.
10sec.
Thermo off
3 or 8 or 15min.
(Notes)
Notes: Compressor is off when compressor OFF time is 15 minutes.

16
AY-M09AE
AE-M18AE
7. Current control
This system, in order to prevent overcurrent during
heating operation, controls the outdoor fan motor and
changes the indoor fan motor speed by detecting total
current.
When the current exceeds P1, the compressor is
automatically stopped. (during heat or cool or dry
operation)
WhenthecurrentexceedsP2,theoutdoorfanmotoris
automatically turned off, and when the current falls
below P4, the outdoor fan motor is turned on.
WhenthecurrentexceedsP3andtheindoorfanspeed
shiftsdownbecauseofcoldair(5.Preheatairflow),the
changes in the indoor fan speed shifts up as follows,
from "D" to "UL", or from "UL" to "L". And when the
current falls bellow P5, the indoor fan speed shift up is
canceled.
Figure Y-10
8. Freeze preventive
When the indoor pipe temperature falls below -1˚C
duringcooloperationordryoperation,thecompressor
is turned off.
9. Defrost
The defrost timer (integrating the operation time of
compressor) counts time with microcomputer during
heat operation.
40 minutes later after starting to operation, or 30
minutes later after defrost, when the outdoor pipe
temperature falls -5˚C, the defrosting is started, and
whenthe outdoorpipetemperatureexceeds11˚C, the
defrosting is ended.
In the defrost operation, first the compressor is turned
off, the san speed is set yo "UL" and the outdoor fan
motor is turned off.
30 seconds later the inddor fan motor is turned off, 50
seconds later the reverse valve is turned off, and 60
seconds later the compressor is turned on.
In the end of defrosting the compressor is turned off,
theoutdoorfanmotoristurnedon,50secondslaterthe
reverse valve is turned on, 60 seconds lateer the
compressor is turned on, starting heat operation.
Atthistime,theindoorfanmotoristurnedofforthefan
spedd is set to "UL" if preheat air flow function is
effective.
Outdoor
Fan motor 
OFF
Indoor
Fan motor
Shift UP
Compressor
OFF
Time
Input current
Current transition
P1 6.3A
P2 5.7A
P3 5.0A
P4 4.3A
P5 4.0A
Figure Y-12
10. Delayed operation of the reverse valve
Whenthe heatoperationis shutdown ortheoperating
modeisswitchedfromheattocoolordry,orviceversa,
the reverse valve is switched after 3 minutes.
11. Test run
If the “TEST RUN” button in the unit is pushed during
suspension of operation, cool test operation starts. At
this time, the fan speed is set to “AUTO”.
If this button is pushed during operation, the test
operation starts in current operation mode. The
operation LED (red) flickers during test run.
In cool and heat mode continuous compressor on
operationisperformed. In drymodethe operation isin
dehumidifying zone. In fan only mode the indoor fan
motor runs continusly.
12.Timer
12-1 24-HOUR PROGRAMMABLE ON/OFF TIMER
ON-TIMER or OFF-TIMER can be
independently programmed. When the unit
operates during one hour after the OFF-time is
set, thermostat setting is automatically shifted
(+1˚C in cool operation and dry operation, -3˚C
in heat operation, but, 16˚C set temperature at
the lowest).
When the ON-timer is set in heat operation
and cool operation, operation starts before 0 to
30 minutes(depends on the room temperature)
so that preset temperature is obtaind at set
time.
12-2 ONE-HOUR TIMER
When ONE-HOUR timer is set, the unit turns
off automatically after one hour. The one hour
timer operation has priority over other time
operation, such as the TIMER ON and TIMER
OFF. If the ONE-HOUR TIMER button is
pressed again during operation, the unit will
operate additionally for another one hour.
Defrost start
Compressor
Reverse
Valve
Outdoor
Fan Motor
Indoor
Fan Motor
Preheat Air
Flow Control
30sec.
MAX. 9min.
50sec. 10sec.
60sec.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
50sec. 10sec.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
UL
Switch ON
Heating Heating Heating
Min. 
40min. Max. 11min. Min.
30min. Max.
11min.
Defrost
Defrost
Figure Y-11

17
AY-M09AE
AE-M18AE
16. Power on start
Iftheconnectingwire"POWERON"(JP8)iscutonthe
PWB ass'y, when the power is supplied by turning on
a circuit breaker, the air conditioner automatically
starts of operation in "AUTO".(Refer to Figure L-1.
Electronics Control Circuit Diagram.)
17. AUTO RESTART
Power failure occurs during operation, the unit will
retart in the same operation mode as before after
power recovery.
18.Test mode
18-1 Indoor unit
Make terminals 1 and 2 of connector CN4 short-
circuited and supply the power.
Hereby the timer's period becomes shortened.
In this test mode, the control times are shortend
as follows.
The operation LED flicker's period not
in Test run shortened
The protector timer
The defrost timernot
Other controls; 1/60 (ex.; 3 min. to 3 sec.)
18-2 Outdoor unit
Make terminals and of connector short circuited
and supply the power. Hereby the timer's period
becomes shorted. In this test mode, the control
times are shorted 1/10
19. Trouble suspension
When indoor fan motor is out of order or compressor
lock occurs, the compressor, indoor fan motor,
outdoor fan motor, and louver are all stopped and
the operation LED(red) turned off and the timer
LED(yellow) turns on or off as follows.
15. Outputs in each operation mode
Table Y-5
13. Automatic air conditioning
When automatic air conditioning is selected, the
operation mode and preset temperature are set
automatically according to the room temperature on
starting operation.
Table Y-4
14. Automatic fan speed
When the automatic fan speed is selected in cool or
heatoperation,thefanspeedisautomaticallychanged
bythe thermostat linesC1 toC3in cooloperation, and
H1 to H4 in heat operation.
a.COOL operation
Room temperature
Preset temperature
Room
temperature
transition
C3
C2
C1
States 1 & 5 :"M"
States 2 & 4 : "L"
States 3 : "UL"
3
4
5
1
2
Figure Y-13
b. HEAT operation
Figure Y-14
Room temperature (˚C)
Preset temperature (˚C)
Room
temperature
transition
States 1 & 7 : "H" 
States 2 & 6 : "M" 
States 3 & 5 : "L" 
States 4 : "UL"/OFF 
H1
H2
1
H4
H3
6
5
4
7
2
3
ON
OFF
ON
OFF
ON
ON
ON
OFF
OFF
ON ON OFF
OFF ON OFF
ON ON ON
OFF
ON/UL/OFF ON
ON UL/OFF ON
OFF OFF OFF
ON L/UL
UL/D
OFF D/OFF
OFF ON
OFF
OFF
OFF
OFF
Mode
Compressor Outdoor
Fan Motor
Cooling
Circulating
Normal
Preheat
Air Flow
Control
ON Defrost
FAN ONLY
Indoor
Fan Motor Valve Coil
C
O
O
L
H
E
A
T
D
R
Y
Cooling
Circulating
Dehumidiflying
Timer LED ON
(yellow) OFF
1 sec.
1 sec.
In this case, when "ON/OFF" button in the remote
control or "AUX" button in the unit is pushed, the unit
is out of "Trouble suspension".
Room temperature
at operation start Operation Mode Preset Temperature
Above 28˚C
Below 21˚C
26˚C
26˚C 28˚C
24˚C 26˚C
21˚C 24˚C
25˚C
24˚C
Room temperature 
at operation start
23˚C
COOL
DRY
HEAT

18
AY-M09AE
AE-M18AE
TROUBLE SHOOTING GUIDE
Trouble diagnosis
This unit has a fuction to diagnose major troubles by itself.
Six kinds of troubles can be detected and informed.
Before repair, first call up the trouble information with the self-disgnosis function, and check it.
1. Self-diagnosis function
(1) In case of some troubles(error No. 1 thru 3), the operation will be stopped if any trouble occurs.
LED on the indoor unit will ficker to automatically inform the trouble occurrence.
The timer LED fickers as shown in Fig. T-1.(The operation LED is turns off.)
Fig. T-1
(2) Call up of trouble information(For details, refer to the self-diagnosis table in Page 20.)
When the operation is stopped, continuously press both AUX button and TEST RUN button for 5 seconds,
the error information display mode will be selected to ficker the timer LED and operation LED in order to
display the error information.
Even through the buttons are released, it will be continously displayed to erase the error display, press the
"OI" Button in the remote control or AUX button.
Example : Wiring connector between the units is improper.
Note : If the power plug is disconnected, the memory of the error information will be erased.
Fig. T-2
1 second 4 second
1 second
ON
Timer LED
OFF
ON 12345
Timer LED
OFF
ON
Operation LED
OFF
If the timer LED fickers 5 times, it will be regarded as 
one block information will be displayed depending on
the state of the operation LED.

19
AY-M09AE
AE-M18AE
2. For the other errors which are not displayed by the self-diagnosis, refer to the troubleshooting flow
chart in Page 21.
Method to repair the control circuit which does not work due to improper wiring between the units
Since a part in the control circuit may be broken, replace the following parts.
Using the tester, check the thermal fuse for continuity(after turning off the power supply and disconnecting
CN5 of the outdoor unit.)
(1) Control circuit of indoor unit
1) Thermal fuse TC 115˚C
2) Photo coupler PC1 PC111L
(2) Control circuit of outdoor unit
1) Thermal fuse TC 115˚C
2) Photo coupler PC2 PC111L (Room A1)
PC4 PC111L (Room A2)
(3) Procedure to install the thermal fuses in the control circuits of the indoor and outdoor units.
RESISTOR
FUSE
INDOOR SIDE
FUSE
RESISTOR
OUTDOOR SIDE
Fig. T-3
(Caution)
(1) Closely install the fuse on the resistor.
(The mass production type is bonded with silicon rubber.)
(2) Solder the fuse for the shortest possible time.
If it is done for a long time, the fuse may be off.
The fuse of the outdoor unit is commonly used in both the rooms A1 and A2.

20
AY-M09AE
AE-M18AE
Self-diagnosis table (error information call-up)
: Turns ON.
Display with operation LED of  indoor unit It is ON at the same time  when timer LED is ON.
Outdoor unit display LED
LED 1 Room  A1 Serial SIGNAL
LED 2 Room  A2 Serial SIGNAL
LED 3 Error display
Diagnosis content
Content Relevant
unit
Indoor
Outdoor Indoor Outdoor Outdoor
No current flows in  the compressor.
Indoor or  outdoor
Check item Remedy
: Turns OFF. : Flickering at 2 seconds intervals. : Flickering at 0.2 seconds intervals.
Error No.
1 2 3 4 5 6
x
1 2 3 4 4 sec.
OFF
5
x x x
Outdoor thermistor is  defective. Open circuit Outdoor thermistor is  defective. Short circuit (0Ω) Indoor thermistor is defective.  Short circuit (0Ω) Indoor thermistor is defective.  Open circuit Wiring connection  between the unit is improper. Compressor is locked. Indoor fan motor rotates  poorly. No diagnosis information.
(1) Does indoor fan rotate ? (2) Check the running capacitor. (3)
Check the wiring and correction of the power supply to the compressor.
(2) Replace the running capacitor. (3) Connect the wiring connection. (4) Replace the compressor. (2)
Unless LED flickers or lights, the outdoor control 
circuit does not operate. 
Refer to trouble shooting flow chart in Page 21 ~ 23.
(1)
Check the voltage of the power supply for 198 to 264V. 
Check that the voltage drops when the compressor is started.
(1) Correct the wiring between the unit. (2) Is LED 1 or LED 2 ON on the outdoor unit ? (1) Check the connection of the  thermistor connector CN4. (2) Check the resistance of the  thermistor. (1) Check the connector of the  thermistor connector CN5. (2) Check the resistance of the  thermistor. (1) Is RY1(room A1) or RY2(room A2) on ? (For check try to TEST RUN the indoor unit.) (2)
Check the connection of compressor from RY1 and RY2.
(3) Check compressor motor protector for activation. (2) Check the connected and soldered state of CN5. (3) Is rotation pulse input to the terminals No. 2 and 3  of CN5. ?
(1) Fan or fan motor locked Replace (1) Improve the power supply. (1)
Since the parts of the control circuit may be 
broken, replace the control circuit in the indoor  and outdoor units. For the circuit repairing method, refer to Page 19.
(1) Improve connection state. (2) Replace the thermistor. (1) Improve connection state. (2) Replace the thermistor. (1) Replace the outdoor control board unit. (2) Connect the wiring connection. (3) Connect the cause of the overloaded  operation. (2) Correct the connecting solder or replace the  control board unit.
CHARACTERISTIC OF TH1 & TH2
0
-10 0 10 20 30 40˚C
20 40 60 80
100 120
kΩ
25˚C
15kΩ