Service Manual: Split System Room Air Conditioners
Service Manual: Split System Room Air Conditioners
Service Manual: Split System Room Air Conditioners
AU-A129E
SERVICE MANUAL
S2918AHA129E/
SPLIT SYSTEM
ROOM AIR CONDITIONERS
INDOOR UNIT
MODELS AH-A129E
OUTDOOR UNIT
AU-A129E
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.
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
SHARP CORPORATION
1
AH-A129E
AU-A129E
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'.
2
AH-A129E
AU-A129E
EXTERNAL DIMENSIONS
897 186
297
58 19.5
182
Remote controller
58 245
236
228
535
20˚
3
AH-A129E
AU-A129E
WIRING DIAGRAMS
TRANSFORMER
SWITCH CN201 BCN NR G(Y) TERMINAL
UNIT CN7 VARISTOR SSR G(Y) BOARD
RECEIVER TERMINAL
4
AH-A129E
AU-A129E
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
5
CN2
FUSE
5V 12V G F
THERMAL FUSE 1 5
7812 C1
AU-A129E
AH-A129E
2.5A 250V L
OUT IN OUT IN 0.1µ
IC3 3 3 IC2 250vAC POWER
D1 D2 SUPPLY
NOTE : C2 NR N
C6 + GND C5 + C4 GND +
C3 2200µ
1. : TEST POINT 100µ 0.1µ 47µ D3 D4 TR
0.22µ 35v
2. Not specified is 1/5w 10v – 50v – 25v 50v –
B
4 4 2 7 TERMINAL
10V R2 R3 C12 0.01µ 250vAC THERMAL
5V BOARD 3P
BCN CN8 22k 22k PROTECTOR
CN2 S201D01 GREEN/YELLOW
JP14 SSR
DE. FAN B
7 CN8 1
JP13 5V 13 11
DE. FAN A L EARTH LINE
JP12 5V
FREEZE B 7 BCN R7 CNR3 N NEUTRAL LINE
3.3k 3
JP11 NC 1 8 Q3 IN OUT
FREEZE A 3
C16 A C 1 OUTDOOR UNIT
JP8 NC 2 7 NC FAN MOTOR RY1
R4 0.1µ C14 2 5
POWER ON IC6 C18 CAPACITOR FAN MOTOR
3 6 6.8k 50v 0.01µ 1 1000P
5V NC 12V
16v 50v CN1
CN201 CN7 4 5
5V
3 3 1
R22
R40 10k 1k D9
5V 2
AUX. 2 2 R24
4.7k
R41 10k
(TEST RUN) 1 1 3
C19 R23 R25
C13 C17 5V RPM 1000p
1000P 1000P 33k 1.2k CN5
29
28
27
26
25
24
23 NC
22 NC
21
20
50v
50v 50v
JP10
KH
12V
P60
P61
P62
P63
P64
P65
P66
P40
12H/24H
GND
TEST 32
OCS IN 30
PHOTO DETECTOR UNIT 5V 5V
OCSOUT 31 NC
JP9
D. FAN OFF
JP7
33 P27 P41 19 OFF WIDEH
R30 JP5 BZ
+ C101 CN101 CN6 10k 34 P26 P42 18 DEICE B
33µ JP4 R5
– 10v 35 P25 P43 17 DEICE A 2.7k
1 1 Q1
(C102) 36 P24 P44 16 3
0.1µ R26 C23
680 1000P 2 5V
25v 37 P23 P45 15 1
2 2 50v 3 IC5 1
38 P22 P46 14
2
3 3 39 P21 F 13 1 C15
3 0.1µ
40 P20 RESET 12 50v
(YELLOW) LED102 4 4 OCS
R29 330 41 K1 SM8313 CK1 11
(RED) LED101 5 5 42 P17 CK2 10 2 8MHz 5V
R28 680 43 P16
12V 12V AGND 9 JP6 5V
IC1 10k R31
6
CN8 BCN NC 44 P15 P30 8
2 SWEAT
NC 45 P14 P31 7 JP3 1
SSR 5 5 10k R32 TEST
NC 46 P13 P32 6 RPM PLUSE
3 2
6 6 47 P12 P33 5 JP1 R19
RY1 10k R33 TH1 15k(25˚C)
R6 48 P11 P50 4 10k 3
PREHEAT R21
470 1 1 49 P10 P51 3 10k
1/2w 10k R34 JP2 ROOM TEMP.
50 P07 P52 2 + 4
2 2 WIRELESS C21 R18 C11
51 P06 P53 1 1000P 15kF 10µ TH2 15k(25˚C)
R35 10k(F) R10 50v R20 – 16v 5
FAN L 10k
PIPE TEMP.
12V + 6
VR
C22
P05
P04
P03
P02
P01
P00
P57
P56
P55
P54
12V R36 10k(F) R9 R17 C10
VDD
GND
FAN M 1000P 15kF 10µ
50v – 16v CN4
9
52
53
58
59
60
61
62
63
64
5 R37 10k(F) R8
FAN H
NC 54
NC 55
NC 56
NC 57
4 5V
R38 10k(F) R12
MODEL B
3 +
C8 C7
10µ 0.1µ R39 10k(F) R11
2 IC4 10v – 50v MODEL A
1
LOUVER MOTOR 8
CN3
D. FAN OFF OFF WIDEH SWEAT RPM PREHEAT WIRELESS FAN L FAN M FAN H MODEL MODEL DE. FAN DE. FAN FREEZE FREEZE POWER ON
DEICE DEICE
FUNCTION 12H / 24H PLUSE CHANG/ B A B A B A
B A
OFF/ON 3/5min. ON/OFF 1/3 OFF/ON NORMAL ON/OFF
19 17 16 15 14 8 7 6 5 4 3 2 1 64 33 34 35 36 40
IC1 PIN NO. (P41) (P43) (P44) (P45) (P46) (P30) (P31) (P32) (P33) (P50) (P51) (P52) (P53) (P54) (P27) (P26) (P25) (P24) (P20)
SYMBOL JP10 JP9 JP7 JP5 JP4 JP6 JP3 JP1 JP2 R10 R9 R8 R12 R11 JP14 JP13 JP12 JP11 JP8
SET X NONE X NONE X NONE X NONE X NONE X NONE USE USE X NONE 2.7k(F) 3.9k(F) 2.7k 1.2k(F) 7.32k(F) X NONE X NONE X NONE X NONE X NONE
R10
JP4
JP5
5
JP10
JP33
JP3
R32
R33
JP6
JP2
JP1
R9
R34
JP35
R36
JP34
R31
1
DEICE A
DEICE B
TIMER
F.M.
C15
R.P.M.
PREH.
JP35
SWEET
WIREL
DPWBF 1 2
A092 CN101 C21
JP7
3 IC5
R8
C22
R12
R11
JBK0 R24
OSC
R38
R23
OFF WIDEH
R20
R37
M.A.
C19
LED102 R4
F.H.
M.B.
20
(YELLOW) RECEIVER 64 JP32
JP29
C20
R21
JP31
R39 JP30
IC6
DPWBFA
R22
C7
QPWBFB253JBE0(P)
32 C18
C16
R30
OUT LED101(RED) C101 52
D3
D1
D4
D2
IN C8 33
R7 C14
IC2 QPWBFB 51 3
GND 126JBE0
JP8
C23 Q3
DE FAN B
JP11
JP12
REEZE A
REEZE B
DEF FAN A
POWER ON
R26 Q1 JP28 1 R16
3 JP27 C13
JP26
JP14
JP13
1 1 C17
JBK0(C)
8 R15
C6 C9
RY3 (TRANSFORMER) GND
From RY2
Q2 IN
JP25
1
JP24
JP23
JP20
OUT C10
Transformer C2
R29
R28
3 IC3
D5
1
9 IC4 16 R17
1 C5
R2
R3
12V
JBK0(P)
R19
JP21
D6
C3 CN1 R18
R40
JP19
JP18
JP17
JP36
7
6 C11
JP22 R41
GND
CT D7
5V
5 JP15
CNR1
7 R5
7
2 CN6 BCN
PURPLE (D) 1 1
R14 (THER-
CNR2
JP16
2
R13 MISTOR) From
7 C4 3
DPWBFA
ORANGE
12V CN4 Thermistor
3 (E)
13
To 1
CN8
D9
R6 F.M. NR QPWBFA891JBE0
Fan motor CN7 BZ
SSR
CAP
R25
CNR3
(G) 1 3 1 5
1
capacitor DPWBFA047JBK0
7
RY1 BLUE
(RPM)
MOTOR
( LOUVER )
1 N BROWN SW101
L (B) CN5 SW102
L CN3
OUT
N TEST
AUX RUN
DIP
From CN201
5 C1
DIP
Microcomputer (IC1)
The microcomputer is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
8
AH-A129E
AU-A129E
FUNCTIONS
1. Temperature control characteristic 2. Operation modes
1-1 COOL operation 2-1 COOL operation
In the “COOL” mode, the thermostat circuit is The compressor turns on or off, at the
controlled by four thermostat lines (C1 thru C4). thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
34.5 C1
C2 States 1 & 3 : Compressor ON
33.5 State 2 : Compressor OFF
32.5 C3
C3
Room temperature
Room temperature( C)
31.5 C4
C4
3
1
20.5
19.5 Room
temperature
18.5 transition
17.5 2
18 32
Preset temperature(˚C) Preset temperature
31.5 D3
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
19.5 Dry operation is divided into three zones
18.5 (Cooling zone, Dehumidifying zone and
Circulating zone) by thermostat lines (D1 to
17.5
D3), and the compressor and the fan motor
are controlled in each zone as shown in Table
18 32
Preset temperature(˚C) H-1.
States 1 & 5 : Cooling zone
Figure H-2 States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
D1
D2
Room temperature
5
1 D3
4
2
Room
temperature
3 transition
Preset temperature
Figure H-4
9
AH-A129E
AU-A129E
C2
5
C3
1
4
2
Room
temperature
3 transition
Preset temperature
Figure H-5
10
AH-A129E
AU-A129E
Outdoor Indoor
Compressor Fan motor Fan motor
Cooling ON ON ON
COOL
Circulating OFF OFF ON
Cooling ON ON L/UL
DRY Dehumidifying ON ON UL/D
Circulating OFF OFF D/OFF
FAN ONLY OFF OFF ON
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.
1sec. 1sec.
ON
Timer 4sec.
LED
OFF
Indoor Operation ON
fan motor LED
OFF
ON
Comp.-lock Operation
LED
OFF
Thermistor Operation ON
short state LED
OFF
Thermistor Operation ON
open state LED
OFF
11
AH-A129E
AU-A129E
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 ;
Table H-5
12
AH-A129E
AU-A129E
REFRIGERATION CYCLE
3
Flare coupling Flare coupling
Service port
Compressor Capillary
tube
1
Accumulator
4 Condenser 2
S
Strainer
13
AH-A129E
AU-A129E
O.D. I.D. L
Capillary tube ø 2.7 ø 1.6 700
14
AH-A129E
AU-A129E
PERFORMANCE CURVES
13600 4.0
(KW)
11900 3.5
10200 3.0
8500 2.5
1500
Input(W)
1000
500
15
14
Outlet air temp.(˚C)
13
12
11
10
8
7
30 31 32 33 34 35 36 37 38 39 40
Outside air temp.(˚C)
15
AH-A129E
AU-A129E
DISASSEMBLING PROCEDURE
INDOOR UNIT
CAUTION: DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING
1. Remove the 3 screw covers in the front panel. 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.
B B
C
16
AH-A129E
AU-A129E
7. Take the thermistor holder from evaporator. 11.Loose 6 screws fixing control box and take out control
ass’y.
8. Take out the thermistor from evaporator. 12.Loose 2 screws fixing drain pan ass’y. (Left side)
9. Disconnect fan motor connectors and others. 13.Loose a screw fixing drain hose.
10.Loose 2 screws for a pipe cover and take it out. 14.When assembling, make sure that O ring is fitted to
Loose the earth screw. the drain hose.
O-ring
Drain hose
O-ring
(Section)
17
AH-A129E
AU-A129E
15.Take out the drain pan ass’y. 19.Take out the fan bearing ass’y.
16.Loose a screw fixing cross flow fan to motor. 20.Take out the cross flow fan while slightly lifting the
evaporator.
18
AH-A129E
AU-A129E
CAUTION:DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING
1 Remove the three(3) screws holding the right 3 Remove the another screws holding the cabinet
side cover and take it out. and take it out.
2 Remove the three(3) screws holding the left side
cover and take it out. NOTE: Number as shown in following figure is the re
moval order.
2
Left side cover
Condenser
Compressor
Bulkhead
Fan motor
3
Fan guard
Figure D-1. OUTDOOR UNIT
19
AH-A129E
AU-A129E
YES
YES
20
AH-A129E
AU-A129E
Is transmitting NO NO
Are batteries of the
indicator of the remote wireless remote controller
controller active ? good ?
NO
YES
Connect the Replace the
connector PWB with a
properly. new one.
Using a tester,
measure the voltage When the signal is NO
between terminals received, does the voltage
of resistor R30 change ?
on the PWB ass'y.
Replace the display unit
YES with a new one.
21
AH-A129E
AU-A129E
180
The room is not cooled.
The compressor does not operate. 160
140
120
Push the button "TEST" on the
indoor unit, and wait 3 minutes. 100
80
10˚C
60 30K
Using a meter, measure voltage at
the terminals on the terminal board. 40
20
0
-10 0 10 20 30 40˚C
Fig. 1
Is there a voltage
between terminal "N" and NO
"1" of the terminal board the
power supply voltage ?
22
AH-A129E
AU-A129E
23
AH-A129E
AU-A129E
To have your order filled prompty and correctly, please furnish the following information.
24
AH-A129E
AU-A129E
1 2 3 4 5 6
INDOOR UNIT
A A
1-35
4-2
4-5
4-4
1-41 4-3
4-10
1-15
2-13
2-2 2-17
2-10 2-12
C 3-2 1-19 2-14 2-7 C
3-1
2-9 2-18
2-7
2-11 1-38 1-32
2-8
2-10 6-1 1-46
2-15
2-16
D D
1-39
1-33 2-4
1-36 1-11
2-1
1-3
2-5 2-3
2-19
1-10
1-16
1-14 1-5
1-6
1-2
E E
4-9
1-12 1-4
1-42 1-9
1-7 1-8
1-12
1-1
1-17 1-18
1-30
1-23 1-13
F 1-21 1-43 F
6-3
1-31
1-26
1-29
1-25
1-48
G G
6-2 1-45
1-27 1-20 1-28
1-44
1-34
1-24 1-37
1-47
4-6 1-22
H H
1 2 3 4 5 6
25
AH-A129E
AU-A129E
To have your order filled prompty and correctly, please furnish the following information.
26
AH-A129E
AU-A129E
1 2 3 4 5 6
OUTDOOR UNIT
A A
1-5
3-2 1-14
1-17
B B
3-16
3-18
3-15
3-17
3-11
6-2
C C
3-19
3-20
1-19
1-15 1-16
3-14 3-3 3-4
1-10 3-6
1-3
6-1
3-8
3-13 3-1 3-10
D 1-16 D
1-2 3-7 3-5
1-4 3-9 6-1 6-1
6-1 3-12
3-21 1-11
6-7
1-1
E E
6-3
1-8
1-7
2-8
6-5 2-4
F 6-4 F
2-5
2-1
2-9
1-21 2-6
2-7
G 6-6 G
1-9 1-6
1-13 6-4 6-6
1-12
2-2
H H
1 2 3 4 5 6
27
AH-A129E
AU-A129E