Sharp AH-S22AW2 User manual

1
AH-S22AW2
AH-S25AW2
SY994AHS25AW2
SERVICE MANUAL
SHARP CORPORATION
AU-S22AW2
AU-S25AW2
OUTDOOR UNIT
Page
SPECIFICATIONS ............................................................................................................................................ 2
EXTERNAL DIMENSIONS................................................................................................................................. 3
WIRING DIAGRAMS......................................................................................................................................... 5
ELECTRICAL PARTS ........................................................................................................................................ 7
BLOCK DIAGRAM ............................................................................................................................................. 8
MICROCOMPUTER CONTROL SYSTEM....................................................................................................... 10
FUNCTIONS .................................................................................................................................................... 14
FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES ............................................................... 19
BREAKDOWN DIAGNOSIS PROCEDURE .................................................................................................... 21
REFRIGERATION CYCLE............................................................................................................................. 23
PERFORMANCE CURVES ............................................................................................................................ 24
DISASSEMBLING PROCEDURE ................................................................................................................... 25
PUMP DOWN....................................................................................................................................................34
REPLACEMENT PARTS LIST......................................................................................................................... 35
TABLE OF CONTENTS
SPLITTYPE
ROOM AIR CONDITIONERS
INDOOR UNIT
MODELS AH-S22AW2
AH-S25AW2
Intheinterestsofuser-safety(Requiredbysafetyregulationsinsome
countries) thesetshouldberestoredtoitsoriginalconditionandonly
parts identical to those specified should be used.

2
AH-S22AW2
AH-S25AW2
SPECIFICATIONS
ITEMS INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR
UNIT AH-S22AW2 AU-S22AW2 AH-S25AW2 AU-S25AW2
Cooling capacity kcal/h 1700(600 - 2300) 1750(600 - 2500)
Moisture removal Liters/h 1.1 1.1
Electrical data
Phase – Single
Rated frequency Hz 60
Rated voltage range V 198 to 242
Rated voltage V 220
Rated current Cool A 3.7(1.5 - 5.6) 3.9(1.5 - 6.1)
Rated input Cool W 720(270 - 1100) 750(270 - 1200)
Power factor Cool % 88 87
Compressor Type Hermetically sealed rotary type
Model 2RD110N5BA03
Oil charge 350cc (SUNISO 4GDID)
Refrigerant system Evaporator Bare tube type Grooved tube type
Condenser Louver Fin and Grooved tube type
Control Capillary tube
Refrigerant volume 630g 660g
Noise level High dB(A) 35 43 36 43
(at cooling) Med. dB(A) 31 – 32 –
Low dB(A) 26 – 27 –
Fan system
Drive Direct drive
Air flow quantity High m3/min. 7.0 23.1 7.2 23.1
(at cooling) Med. m3/min. 6.1 – 6.2 –
Low m3/min. 4.7 – 4.9 –
Fan Cross flow fan Propeller 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: Thermal protector Compressor: Thermal protector
Fan motors: Thermal fuse
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 750 698 750 698
Height mm 270 530 270 530
Depth mm 183 250 183 250
Net weight kg 8 28 8 28
Note: The condition of star (
) marked item are ‘CNS3615’.

3
AH-S22AW2
AH-S25AW2
EXTERNAL DIMENSIONS
Figure E-1. INDOOR UNIT
Figure E-2. OUTDOOR UNIT
AU-F22SEY
250
280
304
470
10.5
38
58
5hole
185 35
85
135
515
530
15
698
129 Length (mm)
AY-F22SE
750
270
183
1500
Length unit (mm)
19.5
58
CRMC-A442JBE0
R03(AAA) 2PCS.
FULL
POWER
SHARP CORPORATION
INVERTER AIR CONDITIONER
182

4
AH-S22AW2
AH-S25AW2
(3) Installation dimensions
The front position of auxiliary pipe is
stamped on the installation plate. 
It is used as a position mark when the 
piping is connected.
A
A
At a distance equal to the scale 
stamped on the installation plate 
you will find the center of rear piping 
hole. Engage the measure with the 
front holder of scale, and measure the 
distance.
B
For ø65, shift the center down by 3 
mm, and makle a hole.
C
C
The triangular dents (2 places) in the
center are for center positioning. which 
are usable for installing.
D
The hole in the center upper part has
-shape. After tentatively tightening
the screw, it is possible to ergage the 
installation plate here.
E
Unit: mm
Installation dimension range 395 to 550 (when the installation angle is used)
50 mm or more
2945
45 3038
270
C
Center of left
piping hole
Profile of indoor unit
750
590 80
Edge
80 400
75 60 135
265 100
75 90
450
ø70 piping hole
E
B
D
Center of rear piping hole
Lintel
Stamp mark

5
AH-S22AW2
AH-S25AW2
WIRING DIAGRAMS
Figure W-1. Wiring Diagram for AH-S22AW2 and AH-S25AW2

6
AH-S22AW2
AH-S25AW2
Figure W-2. Wiring Diagram for AU-S22AW2 and AU-S25AW2

7
AH-S22AW2
AH-S25AW2
For Model AH-S22AW2, AH-S25AW2, AU-S22AW2 and AU-S25AW2
DESCRIPTION MODEL REMARKS SITE
Indoor fan motor MLA486 220 - 240V, 50Hz 220V, 60Hz AH
Indoor fan motor capacitor – 430V, 1.5µF AH
Transformer – Primary; AC 230V, 50Hz AH
Secondary; AC14.6V, 50Hz
Fuse – 250V, 2.5A AH
Compressor 2RD110N5BA03 3-PHASE Induction motor AU
Outdoor fan motor MLA485 220 - 240V, 50/60Hz AU
Outdoor fan motor capacitor – 430V, 1.5µF AU
WPE1 – QFS-AA047JBE0(13A, 250V) AU
WPE2 – QFS-GA015JBE0(10A, 250V) AU
WPE3 – QFS-GA008JBE0(3A, 250V) AU
ELECTRICAL PARTS

8
AH-S22AW2
AH-S25AW2
BLOCK DIAGRAMS
INDOOR UNIT for AH-S22AW2 and AH-S25AW2
DC power supply circuit
Fan motor phase control circuit
Rotation pulse input circuit
AC clock circuit
Louvre motor drive circuit
Remote controller signal
reception circuit
Buzzer drive circuit
CPU reset circuit
CPU oscillator circuit
Room temp. detect circuit
Heat exchanger pipe thermo circuit
Compensation circuit/
select circuit
Compensation circuit
Switchover circuit
Serial I/O circuit
Compressor relay drive circuit
LED drive circuit
Auto restart circuit
Test run circuit
Power on circuit
Flow direction control
(louvre motor)
Wireless remote control
operation
Audible operation confirmation
Room fan motor
Fan motor pulse detect
Room temp. thermistor
Heat exchanger pipe thermistor
Blower temperature,
fan speed, model select
Outdoor ratings
Wireless, preheat
Indoor/outdoor control signal I/O
Outdoor unit power supply
on/off control
LED display
Test run (forced operation)
Self diagnostics,
fault diagnosis
AC power
Unit-unit
wiring (AC
power and
serial
signals)
CPU
Auxiliary mode Auxiliary mode button ON/OFF
2.5 A
FUSE

9
AH-S22AW2
AH-S25AW2
OUTDOOR UNIT for AU-S22AW2 and AU-S25AW2
CPU
Test mode circuit
Model select swith circuit 
(Dip switch)
LED drive circuit
Winter kit circuit (option)
Heat exchanger pipe 
thermo circuit
Compressor thermo circuit
CPU reset circuit
Serial I/O circuit
Power transistor module 
drive circuit
Outdoor fan relay drive
circuit
Power supply
circuit (built
into IPM)
CPU oscillator circuit
AC overcurrent detection
circuit
DC overcurrent detection
circuit
LED
Heat exchanger pipe
thermistor
Compressor thermistor
Current transformer
Compressor
Power 
transistor module
Outdoor fan
Smoothing
circuit
Filter
circuit Unit-unit
wiring (AC
power and
serial
signals)
13 A
protection
Outdoor temp. thermo. 
circuit Outdoor temperature  thermistor
10 A 
protection
3 A
protection
Heat exchanger pipe
thermistor(option)
Outdoor temperature
thermistor(option)

10
AH-S22AW2
AH-S25AW2
MICROCOMPUTER CONTROL SYSTEM
Figure L-1. Electronic Control Circuit Diagram for AH-S22AW2 and AH-S25AW2
+
–
+
–
+
–
+
–
+
–
+
–
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
IC5
5 4 3 2 1
1 2 3 4 5
1 2 3 4 5
2 1 4 3
1
3
2
5 1 6
C6  100µ 10v
C5 47µ 25v
C3 0.1µ 25v
C4 1000µ 25v
C80  0.1µ 25v
C8 0.01µ 16v C7
1000P 50v
C11 10µ 16v
C12 10µ 16v
C10 0.1µ 25v
C9 1000P 50v
C17  100µ 10v
C102 0.1µ 25v
C101 33µ 10v
C2 0.22µ 250v AC
R4 33k
R3 2W 270
R9 10k
R81 1k
R80 6.8k
R6 3.3k
R7 20k
R14 10.0kF R15 10.0kF
R20 33k
C16 0.01µ 16v
R21 3.3k
R33
R35
R39
R13 10k
R38 R36
R34
JP12 R32
R37
R22 1.2k
R10 680
R12 12k
SW1
R11 330
JP11
NC
NC
NC
NC
NC
NC
NC
R5  33k
R1  470  1/2w
R16  1.8k
RY1
5V
+
–
12V
D1 D3 D4
D2
(JP10)
NR1
13 11
SSR1
S201D01
NF1
FUSE
RY1
IN
OUT
TERMINAL  BOARD
OUTDOOR UNIT THERMAL  FUSE 103˚C
EVAPORATOR
SIRIAL  SIGNAL
2.5A 250v T
CNR1
C1 1.5µ 430v
C21 0.01µ250vAC
POWER SUPPLY SINGLE PHASE
Q1
3
12CN7
CN701
D6
TR TRANSFORMER
12V
IC2
9
8
12V
BZ
12V 12V 12V
SSR1
CN101 CN1
PHOTO DETECTOR UNIT
AUX.
(TEST RUN)
(YELLOW) LED102
(RED) LED101
IC101
2 3
CN3
2 3 4 5
CN301
CN4
LOUVER MOTOR
FUNCTION
MODEL 1 fmin UP ON/OFF
MODEL 2 THERMO SHIFT ON/OFF
MODEL 3 AH/AY MODEL 4
fmax DOWN ON/OFF
MODEL 5 OUT T. THERMO ON/OFF
MODEL 6 07/09 MODEL 7
HOT KEEP ON/OFF
WIRELESS CHANGE ON/OFF
PREHEAT OFF/ON RATE
COOL RATE
HEAT FAN L
SPEED FAN M
SPEED FAN H 
SPEED
IC1 PIN NO. 36(P24)
SYMBOL
MODEL
AH-S22AW2
JP1
SET
AH-S25AW2
X NONE
33(P27)
JP4
X NONE
20(P40)
JP5
19(P41)
JP6
35(P25)
JP2
X NONE
34(P26)
JP3
USE
16(P44)
JP9
X NONEX NONE
NOTE :
1. : TEST POINT
5V
D5
5V
5V
JP99
POWER ON
5V
5V 5V
5V
5V
5V
5V
5V
R18 2.7k
R19 4.7k
12V
5V
TH2
PIPE TEMP.
15k(25˚C)
TH1
ROOM TEMP.
10k(25˚C)
5V
5V
NC NC NC
NC NC NC
1 2 3 4
8 7
IC80
6 5
JP4
RATING COOL RATING HEAT
FAN L FAN M FAN H
WIRELESS
PREHEAT
MODEL 6 MODEL 5
MODEL 7
MODEL 1 MODEL 2 MODEL 3 MODEL 4
JP3 JP2 JP1
JP6 JP7 JP8 JP9
OCS
8MHz
3
3
2
1
1
2
JP5
CN8
INOUT
GND
ZD1 HZ5C-1
7812
2. Not specified is 1/5w
X NONE
18(P42)
JP7
USEUSE
17(P43)
JP8
8(P30)
R30, R31
7(P31)
R32, R33
4(P50)
R34, R35
3(P51)
R36, R37
R38: JP R39: NONE
R36: JP R37: NONE
R34: 68k R35: 13k
R32: JP R33: NONE
R30: 5.1k R31: 13k
SET X NONE X NONEX NONE USE X NONEX NONEX NONEX NONE USE R38: JP
R39: NONE
R36: JP R37: NONE
R34: 68k R35: 13k
R32: JP R33: NONE
R30: 5.1k R31: 13k
2(P52)
R38, R39
1
IC3
1
CN9
2
1 3 5
1 2 3
3 4 2
FAN 
MOTOR
HOLE IC
R41 R40 R43
R23 100k
R24 22k
1
23
4
C19 0.047µ 50v
C18 100µ 35v
ZD2 HZ24-2
R44 2W 680 x 5
D7
R42
A S
+
–
C14 1µ 10v
C15 0.01µ 16v
R26 2W 11k R27 2W 11k
C20 0.01µ 250v
5V
R25 4.7k 4
3
PC1 PC2
2
1
R31
R30