Sharp AH-S327W2 User manual

1
AH-S327W2
AU-S327W2
SHARP CORPORATION
SPLITTYPE
ROOM AIR CONDITIONERS
SERVICE MANUAL
Page
SPECIFICATIONS ................................................................................................................................................. 2
EXTERNAL DIMENSIONS..................................................................................................................................... 3
WIRING DIAGRAMS............................................................................................................................................. 4
ELECTRICAL PARTS ............................................................................................................................................ 6
BLOCK DIAGRAM ..................................................................................................................................................7
MICROCOMPUTER CONTROL SYSTEM............................................................................................................ 9
FUNCTIONS ........................................................................................................................................................ 13
FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES ................................................................... 17
BREAKDOWN DIAGNOSIS PROCEDURE ........................................................................................................ 19
REFRIGERATION CYCLE................................................................................................................................. 21
PERFORMANCE CURVES ................................................................................................................................ 22
DISASSEMBLING PROCEDURE ....................................................................................................................... 23
REPLACEMENT PARTS LIST............................................................................................................................. 33
TABLE OF CONTENTS
MODELS
S5712AHS327W2
INDOOR UNIT
AH-S327W2
AU-S327W2
OUTDOOR UNIT
Intheinterestsofuser-safety(Requiredbysafetyregulationsinsome
countries) thesetshouldberestoredtoitsoriginalconditionandonly
parts identical to those specified should be used.

2
AH-S327W2
AU-S327W2 SPECIFICATIONS
Models INDOOR UNIT OUTDOOR UNIT
AH-S327W2 AU-S327W2
Cooling capacitor kcal/hr. 3000(1200 ~ 3300) at 33 ~ 110Hz, 2200 at 60Hz
Moisture removal Liters/h 1.3
Electrical data
Phase - Single
Rared frequency Hz 60
Rated voltage range V 198 to 242
Rated voltage V 220
Rated current A 8.6(2.9 ~ 9.9) at 33 ~ 110Hz, 5.1 at 60Hz
Rated input W 1720(500 ~ 1980) at 33 ~ 110Hz, 970 at 60Hz
Power factor % 91
Compressor Type Hermetically sealed rotary type
Model KHV127FEM
Oil charge 270cc(SUNISO 4GSD)
Refrigerant Evaporator Grooved tube type
system Condenser Corrugate Fin and Grooved tube type
Control Capillary tube
Refrigerant volume 690g
Noise level High dB(A) 41 49
(at cooling) Med. dB(A) 37 -
Low dB(A) 33 -
Fan system
Drive Direct drive
Air flow High m3/min. 9.8 28.3
quantity Med. m3/min. 8.5 -
(at cooling) Low m3/min. 7.0 -
Fan Close flow fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 1/2", 1/4"
Refrigerant pipe sets No. AZ-24H5E; 5m (16.4 ft), AZ-24H7E; 7m (23ft)
Drain pipng mm (Inches) O.D ø 18 (45/64)
Others
Safety device Compressor: Thermal protector
Fan motors: Thermal fuse
Fuse, Micro computer control
Air filter Polypropylene net (Washable)
Net Width mm 790 (31-3/32) 728 (28-21/32)
dimensions Height mm 270 (10-5/8) 530 (20-7/8)
Depth mm 188 (7-13/32) 250 (9-27/32)
Net weight kg 8 31
Note: The condition of star(
) marked item are CNS.

3
AH-S327W2
AU-S327W2
EXTERNAL DIMENSIONS
Figure E-1. INDOOR UNIT
Figure E-2. OUTDOOR UNIT
250
280
304
525
10.5
38
58
5
76.5
141.5
515
530
15
728
98 60
59.5
69.5
790 188
270
1800
58 18
19.5
182
Length unit (mm)

4
AH-S327W2
AU-S327W2 WIRING DIAGRAMS
Figure W-1. Wiring Diagram for AH-S327W2

5
AH-S327W2
AU-S327W2
Figure W-2. Wiring Diagram for AU-S327W2

6
AH-S327W2
AU-S327W2
ELECTRICAL PARTS
For Model AH-S327W2 and AU-S327W2
DESCRIPTION MODEL REMARKS SITE
Indoor fan motor ML-A486 220 - 240V, 50/60Hz 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 KHV127FEM 3-PHASE Induction motor AU
Outdoor fan motor ML-A584 220 - 240V, 50/60Hz AU
Outdoor fan motor capacitor – 430V, 2.0µF AU
WPE1 – QFS-GA014JBE0(20A, 250V) AU
WPE2 – QFS-GA019JBE0(20A, 250V) AU
WPE3 – QFS-GA008JBE0(3A, 250V) AU

7
AH-S327W2
AU-S327W2
BLOCK DIAGRAMS
INDOOR UNIT for AH-S327W2
DC power supply circuit
Fan motor phase control circuit
Rotation pulse input circuit
AC clock circuit
Louver 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
(louver 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
FUSE
Auxiliary mode Auxiliary mode button ON/OFF
2.5 A

8
AH-S327W2
AU-S327W2
OUTDOOR UNIT for AU-S327W2
CPU
Test mode circuit
LED drive circuit
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)
20 A
protection
20 A protection
3 A
protection

9
AH-S327W2
AU-S327W2
MICROCOMPUTER CONTROL SYSTEM
Figure L-1. Electronic Control Circuit Diagram for AH-S327W2
1 2 3 4 5
C101
C102 0.1µ25v
C80 25v 0.1µC8
16v 0.01µ
C10 25v0.1µ
C17 10v 100µ
NC
JP8
JP4 JP3 JP2
JP1
5v
5v SW1
5v
5v
5v
5v
5v
5v
5v
5v
5v
MODEL 8
MODEL 4 MODEL 3 MODEL 2 MODEL 1
RATING 1 RATING 2 CHAMB.T. FAN L FAN M FAN H
POWER ON
AUX.
(TEST RUN)
CN1 CN2
CN3CN301
CN201
CN101
RED
GRAY
GRAY GRAY GRAY
WHITE
11
1 1
33
3 3
2
CN8 CN701
CN9
CN7
1 2 3
22
2
JP 99
60 61
(RED)LED101
(YELLOW)LED102
+
–
R9 10k
R12 10k
R29 680
R31 R33 R46 R35 R37 R39
R30 R32 R45 R34 R36 R38
PHOTO DETECTOR UNIT
R10 680 R11 330
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
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
P41 P42 P43 P44 P45 P46 F RESET CK1 CK2 AGND P30 P31 P32 P33 P50 P51 P52 P53
19 18 17 16 15 14 13 12 11 10
9 8 7 6 5 4 3 2 1
TEST
OSC out
OSC in
P60
P61
P62
GND
P63
P64
P65
P66
KH
P40
32
31
30
29
28
27
26
25
24
23
22
21
20
NC NC NC NC
NC NC NC NC
NC
NC
NC
NC
NC
NC
8
IC2
12v
12v
12v
12v
12v
12v
12v
5 4 3 2 1
9
8
31
32
33
34
35
RED
ORANGE
YELLOW
PEACH
BLUE
LOUVER MOTOR
RY1
R16
1.8k
2
SSR1
30
+
–
39
40
17
8 7 6 5
1 2 3 4
C9
50v
1000P
R1 470 1/2W
IC80 R80
6.8k
R81 1k
R4 33k
R3 2W 270
R5 33k
3
BZ
C6
10v
100µZD1
ZD2
5C-1
C5 25v 47µ
+
–
+
–
+
–
C18
35v
100µ
+
–
41 43 OUT IN
7812
IC3
GND C4
25v 0.1µ
C2 AC 250v 0.1µ
C14 25v 0.1µ
C3 25v 1000µ
44
5v
5v
R7 20k
R6 3.3k
3
12
Q1
C7 50v 1000P
45
14 15
9
7
5
4
3
2
1
13 12 11
JP5 JP6 JP7 JP9
JP10
SIGNAL IN SIGNAL OUT
MODEL 5 MODEL 6 MODEL 7 WIRELESS PREHEAT
1 2
3
OSC
8MHz
6
5v
5v
1
2
3Q2
C16 16v 0.01µ
C15 16v 0.01µ
16 D5
R22 1.2k
R21 3.3k
R18 2.7k
R20 33k
R19 4.7k
IC1
TRANSFORMER
46
D1 D2 D3 D4
47
TR C21
250VAC 0.01µ
C1
430VAC
1.5µ
NR1
55
50
48
49
67 66 68
56 54
NF1
FU1
2.5A 250v T
CNR1
13 11
S201D01 SSR1
YELLOW
RED BLACK BLUE
BROWN GRAY
1
3
5
1
5
6
3 4 2
FAN MOTOR
57
51
38 37
10
D6
R26 2W 11k R23
100k R24
22k
R25 4.7k
R44 2W 680 X 5 R43 R42 R41 R40
R27 2W 11k C19
50v 0.047µ
C20
50v
0.01µ
24-2
C12
16v
10µ
+
–
R15 10.0kF
C11
16v
10µ
+
R14 10.0kF R13 10k TEST
36
62
63
CN4
2
1
5v TH2
TH1
PIPE TEMP. 15k (25°C) ROOM TEMP. 10k (25°C)
IN OUT
BLUE RED
BLACK
POWER SUPPLY
1 2 3
OUTDOOR UNIT THERMAL  FUSE  103˚C
TERMINAL BOARD 4P
A S
52
D7
SERIAL SIGNAL
1 23
4
PC2
4 3
1 2PC1
5v
S M 8 3 1 3
FUNC-
TION
IC1 PIN
No. 16(P44) 17(P43) 36(P24) 35(P25) 34(P26) 33(P27) 20(P40) 19(P41) 18(P42) 29(P60) 8(P30) 7(P31) 5(P33) 4(P50) 3(P51) 2(P52)
JP10SYMBOL JP9 JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 R30, R31 R32, R33 R45, R46 R34, R35 R36, R37 R38, R39
NONESET USE R30: 15K
R31: 13K R32: JP
R33:
NONE
R45: JP R46:
NONE
R34: JP R35:
NONE
R36: JP R37:
NONE
R38: JP R39:
NONE
PREHEAT
NONE/ON
WIRE-
LESS
NORMAL/
CHANGE
MODEL1
fmin UP
ON/
NORMAL
MODEL2
PANEL/
GRILL
MODEL3
AH/AY
MODEL4
HOT K.
NORMAL/
ON
MODEL5
RPM: 1/3
MODEL6
OUT T.
TH.
NONE/ON
MODEL7
ABILITY
1
MODEL8
ABILITY
2
RATED f
COOL RATED f
HEAT CHAMBER
TEMP.
CONTROL
FAN L
SPEED
1~5
FAN M
SPEED
6~10
FAN H
SPEED
11~12
NONE NONE USE NONE NONENONE USE USE
NOTE: 1. : TEST POINT 2. Not specified R is 1/5W.
RPM
RY1
10v 33µ
69
20
21
22
27
26
23 24
1 2

10
AH-S327W2
AU-S327W2
Figure L-2. Electronic Control Circuit Diagram for AU-S327W2
+
1
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
5 3 1
5
4 2
3 1
1
2
1
2
T2
T1 T4 CN3 T3
RY1
CNR1
R15 R14 R13 R12
250v~
0.1µ
250v~
0.1µ
250v~
4700p
250v~
4700p
250v
0.1µ
3.3k
250v~
4700p 250v~
1µ
L3 CT1
L4
R1
3 4
3 4
1 2
1 2
C11
C2
C3
C4
SA1
NR1
C24
C12
NR2
430v 2.0µ
(Fan Motor 
Capactor)
510k
510k R2
C1
WH
WH
L1
20A 250v
3A 250v
WPE3
D1
2W 680
(Control Circuit Board Ass'y)
2W 680 2W
680 2W
680
R11
56k R5
4.7k
R43
10k
R7
IC1 MB89855
(RH-IXA390JBE0)
C14
50v
1000p
C13
R4
2W
680
3
4
2
2
3
1
1
4
5v 5v
R16 10k R17 10k
PC817X7
PC1
PC2
PC853H
LED1
R6
2.7k
C16
5v
5v 5v
2.2k
R3
NC NC
NC
NC NC NC NC NC NC NC NC NC NC NC
NC NC
NC NC NC
0.1µ 25v
R38 (10k) 5v
5v
IC3
2
31PST993D
5v
OSC1
1µ
50v
C23
R10
6.49kF
C15
10v
220µ
5v
D3
D2 1.00kF
R9 +
JP1
1.80kF
R8
BCN12
DTD113ZS
Q3 JP4
KRC106M Q1
D5
RY1
D6
13v
T5
T6
BK
DB1
OR
BCN13
BL PTC1 GR
MRY1
BL
(PTC Thermistor)
BR
CMP
1/2W
270k
1/2W
270k R40
C29
0.33µ630v
R39
T9
T10
T8 WPE2
20A 250v
T7
FC1
YL BL
PM1 (IPM)
+
U RE
WH BK
V
W
(Compressor)
+
50v
1000p
+
TH2
(Thermistor for Condenser)
TH1
(Thermistor for Compressor)
OR WH
WH WH WH WH WH WH WH WH WH RE
5v BCN11
R33U 330 R32X 330 R31V 330 R30Y 330 R29W 330 R28 R34
Z 330
5v
5v
13v13v
ARM
CN8
JP2
R35
C18
1k
C21 C22
R20 R21
6.80kF 6.80kF
16v
10µ
16v
10µ
R37
R36 330k
5v
R27 13k
R26
R25 R23
R24 33k
R22
10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1
4 3 2
4 3 2 1
4 3 2 1
10
9 8 7 6 5
FREQ
NOTE: BK BL BR GN GR G/Y OR RE  WH  YL
(Black) (Blue) (Brown) (Green) (Gray) (Green/Yellow) (Orange) (Red) (White) (Yellow)
WH
L1
(Reactor)
C8
400v
1300µ
400v
1300µ
DB2
BR
RE YL
BR
RE
RE
BL
BR
200v 90µ
C5
BL
+
C9
+
1 2CN9
123
(Terminal Board)
TB
RE
BL
BR
(Thermo. fuse)
G/Y
(Control Box)
FM
(Fan Motor)
1
2