Sharp AH-A129E User manual

AH-A129E
AU-A129E
1
SHARP CORPORATION
TABLE OF CONTENTS Page
SPECIFICATIONS ............................................................................................................................................ 2
EXTERNAL DIMENSIONS................................................................................................................................ 3
WIRING DIAGRAMS......................................................................................................................................... 4
ELECTRICAL PARTS ....................................................................................................................................... 5
MICROCOMPUTER CONTROL SYSTEM........................................................................................................ 8
FUNCTIONS ..................................................................................................................................................... 9
REFRIGERATION CYCLE.............................................................................................................................. 13
PERFORMANCE CURVE............................................................................................................................... 15
DISASSEMBLING PROCEDURE ................................................................................................................... 16
TROUBLESHOOTING OF THE CONTROL CIRCUIT .................................................................................... 21
REPLACEMENT PARTS LIST ........................................................................................................................ 24
SERVICE MANUAL
S2918AHA129E/
SPLIT SYSTEM
ROOM AIR CONDITIONERS
AU-A129E
Intheinterestsofuser-safety(Requiredbysafetyregulationsinsome
countries) thesetshouldberestoredtoitsoriginalconditionandonly
parts identical to those specified should be used.
OUTDOOR UNIT
INDOOR UNIT
AH-A129E
MODELS

AH-A129E
AU-A129E
2
SPECIFICATIONS
ITEMS INDOOR UNIT OUTDOOR UNIT
AH-A129E AU-A129E
Cooling capacity kW 3.45
Moisture removal Liters/h 1.3
Electrical data
Phase – Single
Rated frequency Hz 50
Rated voltage range V 198 to 264
Rated voltage V 220 - 240
Rated current Cool A 5.3 - 5.1
Rated input Cool W 1150 - 1180
Compressor Type Hermetically sealed rotary type
Model RH207VXET
Oil charge 520cc (DIAMOND MS56))
Refrigerant system Evaporator Louver fin and Grooved tube type(7mm tube)
Condenser Louver fin and Grooved tube type(7mm tube)
Control Capillary tube
Refrigerant volume 940g
Capillary tube size Outer dia. mm – 2.7
Inner dia. mm – 1.6
Lenght mm – 700
Q'ty – 1
Noise level High dB(A) 42 48
Med. dB(A) 40 –
Low dB(A) 36 –
Fan system
Drive Direct drive Direct drive
Air flow quantity High m3/min. 9.3 26
(at cooling) Med. m3/min. 8.4 –
Low m3/min. 7.0 –
Fan Cross flow fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 1/2", 1/4"
Refrigerant pipe sets No. AZ-24T7F; 7m(23ft)
Drain piping mm(Inches) O.D ø 18(45/64)
Others
Safety device Compressor: Overload protector(Internal)
Fan motors: Thermal fuse
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 897 720
Height mm 297 535
Depth mm 186 236
Net weight kg 10 35
Note: The condition of star(
) marked item are 'IEC378'.

AH-A129E
AU-A129E
3
EXTERNAL DIMENSIONS
297
186
897
Length unit (mm)
Remote controller
58 19.5
182
Figure E-1. INDOOR UNIT
430
720
775
143 55
245
535
278
236
228
20˚
58
Figure E-2. OUTDOOR UNIT

AH-A129E
AU-A129E
4
WIRING DIAGRAMS
Figure W-2. Wiring Diagram for AU-A129E
Figure W-1. Wiring Diagram for AH-A129E
THERMISTOR
(PIPE TEMP.)
THERMISTOR
(ROOM TEMP.)
LOUVER
MOTOR
1
2
3
4
5
6CN5
CN3
CN101
CN8
CN1
BCN
CN201
RECEIVER
& LED UNIT
SWITCH
UNIT
THERMAL FUSE
TRANSFORMER
CONTROL 
BOARD UNIT 2
WH WH
RE
RE
FAN MOTOR 
CAPACITOR
430V 2µF
FAN MOTOR
R.P.M
SIGNAL
BL
BK
BL GR
RE
CN6
CN7
CN4 CN2
SSR
(C)
(A)
(B)
NR
VARISTOR
RY
CONTROL BOARD UNIT 1
OUTIN BK
BL
250V
FUSE 
T2.5A
INDOOR UNIT
TERMINAL BOARD 2 OUTDOOR UNIT
TERMINAL
BOARD
EVAPO-
RATOR
INTERNAL 
THERMAL 
FUSE
TERMINAL
BOARD 1
POWER
SUPPLY
CORD
BR
BL
G(Y)
N
L
G(Y)
G(Y)
N1
UNIT TO UNIT CORD
BL
BR
BL BK
BL
BR
GR
G(Y)
RE
WH
: BLACK
: BLUE
: BROWN
: GRAY
: GREEN–YELLOW
: RED
: WHITE
N
5
7
1
2
1
5 3 1
INDOOR UNIT
TERMINAL BOARD2
TERMINAL 
BORAD1
UNIT TOUNIT CORD
OUTDOOR UNIT
TERMINALBOARD
CONDENSER
INTERNAL
THERMALFUSE
FAN
MOTOR
FANMOTOR
CAPACITOR
430V1.5µF
COMPRESSOR
MOTOR
MOTOR
PROTECTOR
RUNNING
CAPACITOR
400V30µF
BK
BK
WH
RE
R
BL
BL
BL
BK
RE
G(Y)
C
S
11
N
N
L
BK
BL
G(Y)
RE
WH
:BLACK
:BLUE
:GREEN-YELLOW
:RED
:WHITE
N

AH-A129E
AU-A129E
5
ELECTRICAL PARTS
DESCRIPTION MODEL REMARKS SITE
Compressor RH207VXET 220/240V, 50Hz, 1000W AU
Indoor fan motor ML-A525 220 - 240V, 50Hz, 220V, 60Hz AH
Outdoor fan motor ML-A593 220/240V, 50Hz, 220V, 60Hz AU
Indoor fan motor capacitor – 430V, 2µF AH
Outdoor fan motor capacitor – 430V, 1.5µF AU
Running capacitor – 400V, 30µF AU
Transformer – Primary; AC 220/240V, 50Hz AH
Secondary; AC14.5/15.9V, 50Hz
Fuse – 250V, 2.5A AH

AH-A129E
AU-A129E
6
Figure L-1. Electronic Control Circuit Diagram
+
–
+
–
+
–
+
–
+
–
+
–
+
–
19
P41 18 P42 17 P43 16 P44 15 P45 14 P46 13
F12
RESET
33 P27 34 P26 35 P25 36 P24 37 P23 38 P22 39 P21 40 P20 41 K1 42 P17 43 P16 44 P15 45 P14 46 P13 47 P12 48 P11 49 P10 50 P07 51 P06
11
CK1
SM8313
IC1
10
CK2 9
AGND 8
P30 7 P31 6 P32 5 P33 4 P50 3 P51 2 P52 1 P53
32
TEST
52 P05
53 P04
54 P03
55 P02
56 P01
57 P00
58 GND
59 VDD
60 VR
61 P57
62 P56
63 P55
64 P54
31
30
OCS
IN
OCS OUT
29
P60 28
P61 27
P62
26
GND 25
P63 24
P64 23
P65 22
P66 21
KH 20
P40
IC3 IC2
IC5
RPM
3 4
3 2 1
3 2 1
3
1 5
1
1 2 3
5 4 3 2 1
1 2 3 4 5
1 2 3 4 5
5 6 1 2
5 6 1 2
1 2 3 4 5 6
L
N N
1
3 5
2
7 7
7
4
C6  100µ 10v
C5  0.1µ 50v
C4  47µ 25v
C3  0.22µ 50v
C16  0.1µ 50v C14 
0.01µ 16v
C18 1000P 50v
C15 0.1µ 50v
C19 1000p 50v
C21 1000P 50v
C7 0.1µ 50v
C23 1000P 50v
C17 1000P 50v
C13 1000P 50v
C8  10µ 10v
(C102) 0.1µ 25v
C101 33µ 10v
C11 10µ 16v
C10 10µ 16v
C22 1000P 50v
C2  2200µ 35v
C1  0.1µ 250vAC NR
R2  22k
R30  10k
R22  1k
R4  6.8k
R7  3.3k
R23 33k
R19 10k
R18 15kF
R17 15kF
R5  2.7k
R24  4.7k
R21  10k R20  10k
10k 10k 10k 10k
R31 R32 R33 R34
R35 10k(F) R36 10k(F) R37 10k(F) R38 10k(F) R39 10k(F)
R25  1.2k
R29 330
R41 10k R40 10k
R28 680
R26 680
NC
NC
NC
NC
NC
NC
NC
R3  22k
R6  470  1/2w
RY1
OUT
5V 12V
OUT 7812
D1 D3 D4
D2
G F
A C
13 11
SSR
S201D01
L
FUSE
2.5A 250V
CNR3
C12 0.01µ250vAC
FAN MOTOR CAPACITOR
THERMAL PROTECTOR
B
IN OUT
RY1
POWER SUPPLY
TERMINAL BOARD 3P GREEN/YELLOW
EARTH LINE NEUTRAL LINE OUTDOOR UNIT
FAN MOTOR
BCN CN8 CN2
CN2
Q3
3
12
CN1
12V
TR
12V
IC4
9
8
12V
12V 12V
SSR
CN101
CN201 CN7
CN6
PHOTO DETECTOR UNIT
AUX.
(TEST RUN)
(YELLOW) LED102
(RED) LED101
2 3
CN3
CN4
CN8 BCN
LOUVER MOTOR
NOTE :
1. : TEST POINT
5V
BCN CN8
D9
5V
5V
5V
5V
5V 5V
5V
5V
5V
5V
12V
TEST
TH1
ROOM TEMP.
15k(25˚C)
TH2
PIPE TEMP.
15k(25˚C)
BZ
5V
5V
10V
NC NC NC
NC NC NC
NC
1 2 3 4
8 7
IC6 6
5
JP14
DE. FAN B
12H/24H
SWEAT
PREHEAT
FAN L FAN M FAN H
MODEL B MODEL A
WIRELESS
RPM PLUSE
DEICE B DEICE A
D. FAN OFF
OFF WIDEH
DE. FAN A FREEZE B FREEZE A
POWER ON
JP13 JP12 JP11
JP9 JP7 JP5 JP4 Q1
OCS
8MHz
3
3
3
2
1
1
1
2
2
JP10
JP6 JP3 JP1 JP2
R10 R9 R8 R12 R11
JP8
CN5
IN IN
THERMAL FUSE
GND GND
2. Not specified is 1/5w
FUNCTION 12H / 24H
IC1 PIN NO. 19
(P41)
SYMBOL JP10
SET X NONE
DEICE
BDEICE
A
15
(P45)
JP5
14
(P46)
JP4
X NONEX NONEX NONE
SWEAT
ON/OFF
8
(P30)
JP6
D. FAN OFF
OFF/ON
17
(P43)
JP9
X NONE
OFF WIDEH
3/5min.
16
(P44)
JP7
X NONE
WIRELESS
CHANG/
NORMAL
5
(P33)
JP2
X NONE
RPM
PLUSE
1/3
7
(P31)
JP3
USE
PREHEAT
OFF/ON
6
(P32)
JP1
2.7k(F) 2.7k
FAN L
4
(P50)
R10
3.9k(F)
FAN M
3
(P51)
R9
FAN H
2
(P52)
R8
1.2k(F)
MODEL
B
1
(P53)
R12
7.32k(F)
MODEL
A
64
(P54)
R11
X NONE
DE. FAN
B
33
(P27)
JP14
X NONE
DE. FAN
A
34
(P26)
JP13
X NONE
FREEZE
B
35
(P25)
JP12
X NONE
FREEZE
A
36
(P24)
JP11
X NONE
POWER ON
ON/OFF
40
(P20)
JP8
USE

AH-A129E
AU-A129E
7
Figure L-2. Printed Wiring Board
DPWBFA JBK0(P)
250V 2.5AT GRAY
BROWNC12
(F)
FUSE
RY1
OUT
R6
SSR
CNR3
2
13
1
7
C4 12V
7
CN8
1
(FAN MOTOR) CN2
CN5
(B)
(E)
CN7
CN6 R5
BCN
JP15
JP17
1
1
1
1
3
3
5
CN1
CNR1
D5
D3
QPWBFB253JBE0(P)
D1
D4
D2
R3
R2
1
(TRANSFORMER)
RY3
RY2
C2
C3
IC2
OUT
IN
GND
7
5
71
CN4
(THER-
MISTOR)
DPWBFA047JBK0
QPWBFA891JBE0
R14 R13
SW102
CN201
CN3
13
AUX
SW101 TEST
RUN
CT D7
BZ
N
(A)
ORANGE
CNR2
(D)
PURPLE
BROWN
BLUE
BLUE
L
(RPM)
JP16
NR (G)
C1
1
5
(C)
F.M. CAP
F.M. CAP
3
2
R10
JP35
R36
R9 R11
JP29
JP30
JP31
R30 JP20
R29
R28
C20
C7
R39
R12
R8
R38
R37
PHOTO DETECTOR UNIT
R33
R32
R31
TIMER
DEICE B
DEICE A
JP4
JP34
JP5
JP9
C15 OSC
JP7
R23 R21
R22
JP12
JP14
JP13
REEZE B
DEF FAN A
DE FAN B
OFF WIDEH
D. FAN OFF
SWEET
R.P.M.
PREH.
WIREL
F.M. M.A.
M.B.
F.H.
REEZE A
POWER ON
JP25
D6
JP24
JP23
JP18
JP21
JP22
GND
12V
5V
R40
R41
R25
DIP
D9
LOUVER
MOTOR
()
JP19
JP36
JP11
JP8
IC6
R20
DPWBFA JBK0(C)
JP10
R34
JP2
JP1
JP3
JP6
QPWBFB253JBE0(C)
JP33
IC5
3
2
1
JP35
JP32
R4
20
19
1
64
52
C8
C23
Q1
3
R26
51
IC1
CN101
RECEIVER
LED102 (YELLOW)
LED101(RED) C101
QPWBFB 126JBE0
32
33
GND
IN
1
3
C9
C10
R17 R19 R18
C11
OUT IC3
C5
6
Q2
C6
C17
1
116
IC4
81
9
JP26 JP27 JP28
C13
C21 C22
R24
C19
R7
C14
C16 C18
Q3
3
1R16
R15
DSGY-A878JBK0
DPWBF A092 JBK0
5 1
DIP
N
L
From Thermistor
From fan motor
From Terminal  board " L "
From Terminal  board " 1 "
To Fan motor capacitor
To Fan motor capacitor
From Transformer
From louver

AH-A129E
AU-A129E
8
Pin Terminal Input
No. Name Output Function
33 P27 IN MODEL 4
34 P26 IN MODEL 3
35 P25 IN MODEL 2
36 P24 IN MODEL 1
37 P23 IN SWITCH AUX.
38 P22 IN SWITCH TEST RUN
39 P21 IN –
40 P20 IN POWER ON
41 KI IN WIRELESS SIGNAL
42 P17 OUT LED OPERATION
43 P16 OUT LED TIMER
44 P15 OUT –
45 P14 OUT –
46 P13 OUT (VALVE COIL)
47 P12 OUT (OUT DOOR FAN)
48 P11 OUT RY1
49 P10 OUT SSR
50 P07 OUT LOUVER MOTOR
51 P06 OUT LOUVER MOTOR
52 P05 OUT LOUVER MOTOR
53 P04 OUT LOUVER MOTOR
54 P03 OUT –
55 P02 OUT –
56 P01 OUT –
57 P00 OUT –
58 GND IN 0V
59 VDD IN 5V
60 VR IN 5V
61 P57 IN (CURRENT LEVEL)
62 P56 IN TH1
63 P55 IN TH2
64 P54 IN MODEL A
Microcomputer (IC1)
The microcomputer is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name Output Function
1 P53 IN MODEL B
2 P52 IN FAN H
3 P51 IN FAN M
4 P50 IN FAN L
5 P33 IN WIRELESS
6 P32 IN PREHEAT
7 P31 IN PRM PLUSE
8 P30 IN SWEAT
9 AGND IN 0V
10 CK2 IN OSILLATION
11 CK1 IN OSILLATION
12 RESET IN RESET
13 F OUT BUZZER
14 R46 IN DEICE A
15 R45 IN DEICE B
16 R44 IN COMP. OFF WIDTH
17 R43 IN DEHUM. FAN OFF
18 R42 IN TEST 1
19 R41 IN –
20 R40 IN –
21 KH IN PRM SIGNAL
22 P66 IN –
23 P65 IN –
24 P64 IN –
25 P63 IN AC CLOCK
26 GND IN 0V
27 P62 IN –
28 P61 OUT EEPROM CLOCK
29 P60 IN EEPROM DATA
30 OSC IN –
31 OSC OUT –
32 TEST IN –
MICROCOMPUTER CONTROL SYSTEM

AH-A129E
AU-A129E
9
1. Temperature control characteristic
1-1 COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C4).
Figure H-3
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 measures 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.
FUNCTIONS
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.
Figure H-1
1-2 DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
Room temperature( C)
Preset temperature(˚C)
18 32
C1
C2
C3
C4
17.5
18.5
19.5
20.5
31.5
32.5
33.5
34.5
Room temperature( C)
Preset temperature(˚C)
18 32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Figure H-2
Figure H-4
Room temperature
Preset temperature
Room 
temperature
transition
C3
C4
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
3
Room temperature
Preset temperature
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

AH-A129E
AU-A129E
10
Table H-1
2-3 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 H-2
7. Timer
7-1 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.
7-2 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.
8. 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 H-3
9. Automatic fan speed
When the automatic fan speed is selected in cool or
heat operation, the fan speed is automatically changed
by the thermostat lines C1 to C3 in cool operation
and H1 to H4 in heat operation.
Figure H-5
4. Anti-sweating
When the operation continues 30 minutes in cooling
zone or dehumidifying zone during dry operation or
in continuous compressor operation during cool
operation, the fan speed of indoor fan motor shifts
up, from “UL” to “L” or from “D” to “UL”.
5. Freeze preventive
When the indoor pipe temperature falls below -1˚C
during cool operation or dry operation, the compressor
is stopped.
6. 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. During cool operation and
heat operation, the compressor is kept on but in dry
operation it is set in the dehumidifying zone. In fan
only mode the indoor fan motor runs continuously.
Compressor
Fan speed
ON "UL"
ON "D"
OFF
Cooling zone
Dehumidifying zone
Circulating zone "D" or OFF
COOL
FAN ONLY
M M
L L
UL
HIGH
FAN Switch
LOW
SOFT UL
Operation 
start Preset  temp.
COOL 26˚C 25˚C
DRY
26˚C to 28˚C
Above 28˚C
Room temp. of 
operation start
24˚C to 26˚C
Below 24˚C 24˚C
Room temp. at 
operation start
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

AH-A129E
AU-A129E
11
10.Power on start
If the connecting wire "POWER ON" is cut on the
PWB ass’y, when the power is supplied by turning
on a circuit breaker, the air conditioner automatically
starts of operation in “AUTO” mode.
(Refer to Figure L-2. Printed Wiring Board.)
11.Auto restart
Power failure occurs during operation, the unit will
restart in the same operation mode as before after
power recovery.
(Refer to Figure L-2. Printed Wiring Board.)
12.Outputs in each operation mode Table H-4
13.Diagnosis procedure
When indoor fan motor is out of order or compressor lock occurs, the compressor, inddor fan motor, outdoor fan
motor, and louver are all stopped and the operation LED(red) turns on or off syncronously with the timimg of the
timer LED.
When the thermistor for room temperature or pipe temperature is open or short state, the operation LED turns on
or off syncronously with the timing of the timer LED by pushing continously for more than three seconds both
"TEST" button and "AUX." button.
Timing chart of Timer LED and Operation LED of DIAGNOSIS PROCEDURE.
When "OI" button the remote controller or "AUX." button in the unit is pushed, the unit is free from DIAGNOSIS
PROCEDURE.
Indoor 
fan motor
Comp.-lock
Thermistor 
short state
Thermistor 
open state
Timer 
LED
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Operation 
LED
Operation 
LED
Operation 
LED
Operation 
LED
1sec. 1sec.
4sec.
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
ON
ON
L/UL
UL/D
D/OFF
OFF OFF ON
Cooling
Dehumidifying
Circulating
DRY
Compressor Outdoor
Fan motor Indoor Fan motor
FAN ONLY
COOL Cooling
Circulating

AH-A129E
AU-A129E
12
14.Test mode
14-1 TEST 1 (For control circuit operation checking)
Make terminals 1 and 2 of connector CN4 short-circuited and supply power.
The timer's periods become shorter i.e. a 3 minute cycle is carried out in 3 seconds, except for ;
The operation LED flicker's period
in Test run
The protector timer not shortened
The defrost timer
14-2 TEST 2 (For output of each operation checking)
Test mode is for checking output of each operation. Keep pushing both the buttons, "AUX." and "TEST
RUN", and supply the power, the system will go to the test 2 mode.
In this mode, the output of operation is switched by the "TEST RUN" button in the unit or the "OI" button in
the remote controller. Use the "AUX." button to back to step 1. Normal outputs are shown in Table H-5.
Table H-5
Step
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Output for outdoor unit Lamps
RED YELLOW Indoor
Fan motor Louver
OFF
(Back to step 1)
OFF OPEN
ON D OFFFlickering
M OFF
L CLOSE
D OFF
UL OFF
H OFF
M OFF
L OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
ON
12
3
1
2
3
: 7˚C Room temp. 42˚C ON 
: 7˚C (Room temp.) or (Room temp.) 42˚C OFF
: –2˚C Pipe temp. 42˚C ON 
: –2˚C (Pipe temp.) or (Pipe temp.) 42˚C OFF
: ON in the case of Power on start
ON
ON
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
ON
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
23 OFF OFFOFFOFF OFF

AH-A129E
AU-A129E
13
Figure R-1. Refrigeration Cycle
REFRIGERATION CYCLE
Figure R-2. Flow of Refrigerant
Indoor unit
Outdoor unit
Flare coupling
Evaporator
Strainer
Condenser
Accumulator
Compressor Capillary
tube
Flare coupling Flare coupling
Flare coupling
1
42
3
S
Service port
S

AH-A129E
AU-A129E
14
Cycle temperature and service port pressure
(ISC Cooling)
ISO Cooling T1 condition
Dimension of Capillary tube
O.D. I.D. L
Capillary tube ø 2.7 ø 1.6 700
Cooling
81˚C
39˚C
13˚C
9˚C
0.53MPa
Service port pressure
NO. Condition
1
2
3
4
Gauge pressure
Indoor side Outdoor side
Cooling Temperature (˚C) Relative humidity (%) Temperature (˚C)
27 47 35 40
Relative humidity (%)

AH-A129E
AU-A129E
15
Figure P-1. At Cooling
PERFORMANCE CURVES
Indoor air temp. : 27˚C
Indoor humidity : 47RH%
Indoor fan speed : Hi
1500
2.5
3.0
3.5
4.0
4.5
(KW)
1000
500
15
14
Input(W)
13
12
11
10
9
8
7
Outside air temp.(˚C)
Outlet air temp.(˚C)
30 31 32 33 34 35 36 37 38 39 40
8500
10200
11900
13600
15300
Cooling capacity (BTU/h)
Power source : 1ø 220V 50Hz

AH-A129E
AU-A129E
16
1. Remove the 3 screw covers in the front panel.
2. Remove 3 fixed screws.
4. Close the open panel softly, and then press B and C
of it securely.
Remove the front panel ass’y as to lift up.
DISASSEMBLING PROCEDURE
INDOOR UNIT
CAUTION: DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING
BB C
5. Loose a cord clamp screw and take it out.
6. Loose 3 screws on the terminal board and take out
the unit-to-unit cord from it.
3. Pull the open panel at A toward you.
Remove a fixed screw.
A A

AH-A129E
AU-A129E
17
7. Take the thermistor holder from evaporator.
8. Take out the thermistor from evaporator.
9. Disconnect fan motor connectors and others.
10.Loose 2 screws for a pipe cover and take it out.
Loose the earth screw.
11.Loose 6 screws fixing control box and take out control
ass’y.
12.Loose 2 screws fixing drain pan ass’y. (Left side)
13.Loose a screw fixing drain hose.
14.When assembling, make sure that O ring is fitted to
the drain hose.
O-ring
O-ring
Drain hose
(Section)

AH-A129E
AU-A129E
18
15.Take out the drain pan ass’y.
16.Loose a screw fixing cross flow fan to motor.
17.Slide the cross fan leftward to depart from the motor
shaft and take out fan motor.
19.Take out the fan bearing ass’y.
18.Loose 2 screws fixing evaporator.
20.Take out the cross flow fan while slightly lifting the
evaporator.

AH-A129E
AU-A129E
19
1Remove the three(3) screws holding the right
side cover and take it out.
2Remove the three(3) screws holding the left side
cover and take it out.
FOR OUTDOOR UNITMODEL AU-A129E
CAUTION:DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING
3Remove the another screws holding the cabinet
and take it out.
NOTE: Number as shown in following figure is the re
moval order.
Figure D-1. OUTDOOR UNIT
Left side cover
Condenser
Right side cover
Cabinet
Fan motor
Propeller fan
Compressor
Fan guard
1
2
Bulkhead
3

AH-A129E
AU-A129E
20
TROUBLESHOOTING OF A CONTROL CIRCUIT
measure the secondary voltage
of transformer.
YES
NO
YES
NO
The machine does not function
at all with remote controller and
switches on the indoor unit.
Using a meter, measure the 
voltage between anodes of D1 
and D2 on the PWB ass'y 1.
Is the measured value 
approx. 20.6 Vac ?
Replace the PWB with a new 
one.
Is the 2.5A fuse 
open circuit ?
Replace the fuse and varistor 
with new ones. Replace the transformer with
a new one.