Sharp AH-X127E User manual

AH-X127E
AU-X127E
AY-X127E
AE-X127E
1
SHARP CORPORATION
S4709AYX127E/
SPLITTYPE
ROOM AIR CONDITIONERS
Intheinterestsofuser-safety(Requiredbysafetyregulationsinsome
countries) thesetshouldberestoredtoitsoriginalconditionandonly
parts identical to those specified should be used.
SERVICE MANUAL
Page
SPECIFICATIONS ................................................................................................................................................. 2
EXTERNAL DIMENSIONS..................................................................................................................................... 4
WIRING DIAGRAMS............................................................................................................................................. 5
ELECTRICAL PARTS ............................................................................................................................................ 8
BLOCK DIAGRAM ..................................................................................................................................................9
MICROCOMPUTER CONTROL SYSTEM.......................................................................................................... 11
FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES ................................................................... 26
BREAKDOWN DIAGNOSIS PROCEDURE ........................................................................................................ 29
REFRIGERATION CYCLE................................................................................................................................. 31
PERFORMANCE CURVES ................................................................................................................................ 34
DISASSEMBLING PROCEDURE ....................................................................................................................... 35
OPTION ............................................................................................................................................................... 45
REPLACEMENT PARTS LIST............................................................................................................................. 47
TABLE OF CONTENTS
MODELS
INDOOR UNIT
AH-X127E
AY-X127E
AU-X127E
AE-X127E
OUTDOOR UNIT

AH-X127E
AU-X127E
AY-X127E
AE-X127E
2
SPECIFICATIONS
Models INDOOR UNIT OUTDOOR UNIT
AH-X127E AU-X127E
Cooling capacitor kW 3.5 (1.4 3.8)
Moisture removal Liters/h 1.3
Electrical data
Phase - Single
Rared frequency Hz 50
Rated voltage range V 198 to 264
Rated voltage V 220 - 240
Rated current A 7.9 - 7.5
Rated input W 1650
Power factor % 95 - 92
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 720g
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 33
Note: The condition of star(
) marked item are 'IEC 378'.

AH-X127E
AU-X127E
AY-X127E
AE-X127E
3
Models INDOOR UNIT OUTDOOR UNIT
AY-X127E AE-X127E
Cooling capacitor kW 3.5 (1.4 3.8)
Heatpump kW 4.5 (1.4 5.7)
Heating capacitor
Moisture removal Liters/h 1.3
Electrical data
Phase - Single
Rared frequency Hz 50
Rated voltage range V 198 to 264
Rated voltage V 220 - 240
Rated current Cool A 7.9 - 7.5
Heat A 7.9 - 7.5
Rated input Cool W 1650
Heat W 1650
Power factor Cool % 95 - 92
Heat % 95 - 92
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 790g
De-Ice system Micro computer controled reverse system
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 34
Note: The condition of star(
) marked item are 'IEC 378'.

AH-X127E
AU-X127E
AY-X127E
AE-X127E
4
EXTERNAL DIMENSIONS
Figure E-1. INDOOR UNIT
Figure E-2. OUTDOOR UNIT
790 188
270
800
58 18
19.5
182
Length unit (mm)
250
280
304
525
10.5
38
58
5
76.5
141.5
515
530
15
728
98 60
59.5
69.5
Length unit (mm)

AH-X127E
AU-X127E
AY-X127E
AE-X127E
5
WIRING DIAGRAMS
Figure W-1. Wiring Diagram for AH-X127E and AY-X127E
TERMINAL BOARD
GREEN-YELLOW
POWER SUPPLY
LOUVER MOTOR
ROOM TEMP THERMISTOR PIPE TEMP THERMISTOR FAN MOTOR
CAPACITOR 430V 1.5µF
RECEIVER BOARD UNIT DISPLAY BOARD UNIT
ORANGE
YELLOW
TH1 CN4
CN7 CN8
CN1 A CN2 BLUE
BLUE BLUE
FAN MOTOR
CN3 NR1
TH2 TH2-1
TH2-2
1 2
BLACK MA
C1
TR
5 3 1 RED
RED
C
S
R.P.M. SIGNAL
CONTROL BOARD UNIT
FUSE 250V 2.5A T
OutIn
SSR1
BROWN RY1
INDOOR UNIT
BLACK
TERMINAL BOARDTERMINAL BOARD OUTDOOR UNIT
FAN MOTOR
COMPRESSOR
UNIT TO UNIT CORD
CONTROL BOARD UNIT
1 1
2 2
N N
L
N
SERIAL SIGNAL CIRCUIT
LED INDICATION FOR SELF-DIAGNOSIS
Abnormal conditions
Short circuit of the outdoor thermistor Overheat of the compressor Abnormal AC current Compressor lock Open circuit of the outdoor thermistor DC overcurrent or over heat of the IPM AC overcurrent Open circuit of serial signal line Short circuit of serial signal line Abnormal fan motor of indoor unit
<Indication of the abnormal condition> LED yellow and LED red indicate automatically, if the set is in abnormal condition.
: LED no blink: LED blink
<LED yellow bliking> LED yellow blinks 5 times in 10 seconds.
Blink steps
<LED red blinking> Abnormal condition is indicated by the blink- ing pattern of LED red.

AH-X127E
AU-X127E
AY-X127E
AE-X127E
6
Figure W-2. Wiring Diagram for AU-X127E
1
N
N
L
2
1
N
2
1 3 5 4
3 2 1
INDOOR UNIT TERMINAL
BOARD OUTDOOR UNIT
TERMINAL BOARD
CONTROL  BOARD UNIT
TERMINAL BOARD
UNIT TO UNIT CORD
CAUTION
The voltage is high at C8,C9 (electronic capacitors) on outdoor unit. For mentenance dischage at C8,C9 to prevent electric shock. In case that WPE2 (protecter) has been fused, the voltage is kept high at C8,C9.
G(Y)
G(Y)
T1 WPE1 SA1 NR1
T4
T5
C3
C4
L3
C11
20A 250V
BR
BL T2
T11
T3
RE
CN3
AM
CRE
BK BL
CN8
FAN MOTOR CAPACITOR 2µF 430V
FAN MOTOR
CONTROL BOARD UNIT
BCN12 MRY1
GR
GR
BL
BL
T6
PTC1
CT1
C1
BK
REACTOR
L4
WPE3 3A 250V
NR2
RY1
CNR1 C24
C2
LED INDICATION OF SELF-DIAGNOSIS ON OUTDOOR UNIT
LED BLINKING
LED turns on Slow flashing (1 time for 2 seconds) Quick flashing (3 times for 2 seconds)
Example: NO.2 Compressor lock
on off 1.0sec 1.0sec 1.0sec0.6sec 0.6sec 0.6sec 1.0sec 1.0sec0.6sec 0.6sec 0.6sec0.6sec
NO.3 Overheat of the compressor
NO.
1 2 3 4
Normal Abnomal signal line Compressor lock  Overheat of the compressor DC overcurrent or overheat of the IPM
Short circuit of the thermistor Open circuit of the thermistor AC abnormal current AC overcurrent
LED indication pattern Mulfunction part or abnormal condition NO.
5 6 7 8
LED indication pattern Mulfunction part or abnormal condition
FAN MOTOR
BK BL BR GR
BLACK BLUE BROWN GRAY
: : : :
RE WH OR G(Y)
RED WHITE ORANGE
: : :
YE YELLOW
:
:GREEN-YELLOW
DIODE BRIDGE DIODE BRIDGE
DB1 DB2
OR
~~ ~~
REACTOR L2
50µF 200V
WH WH
1 4 RE YE
BL
RE C5
C10 GR
BK
C6
C8
BL BL
BL
150µF 400V 150µF 400V GRC9 BR
GR
YE
YE
C7
4700µF 63V T9 T7
WPE2 20A 250V
YE
YE
BL
BL
T10
T8
2000µF 400V 2000µF 400V
FC1
C29
POWER  TRANSISTOR MODULE (PM1)
U V W
BCN11
RE WH BK
COMPRESSORU(R)
V(S) W(C)
THERMISTOR COMPRESSOR TEMP.
THERMISTOR PIPE. TEMP.
TH1
TH2OR
WH
L1

AH-X127E
AU-X127E
AY-X127E
AE-X127E
7
Figure W-3. Wiring Diagram for AE-X127E
1
N
N
L
2
1
N
2
3 1 1 3 5
6 5 4 3 2 1
INDOOR UNIT TERMINAL
BOARD OUTDOOR UNIT
TERMINAL BOARD
CONTROL  BOARD UNIT
TERMINAL BOARD
UNIT TO UNIT CORD
CAUTION The voltage is high at C8,C9 (electronic capacitors) on outdoor unit.
For mentenance dischage at C8,C9 to prevent electric shock. In case that WPE2 (protecter) has been fused, the voltage is kept high at C8,C9.
G(Y)
G(Y)
T1 WPE1 SA1 NR1
T4
T5
C3
C4
L3
C11
20A 250V
BR
BL T2
T11
T3
RE
RY2
CNR2
CN4 CN3
4 WAY VALVE COIL FAN
MOTOR
AM
CRE
BK BL
CN8
FAN MOTOR CAPACITOR 2µF 430V
CONTROL BOARD UNIT
BCN12 MRY1
GR
GR
BL
BL
T6
PTC1
CT1
C1
BK
REACTOR
L4
WPE3 3A 250V
NR2
RY1
CNR1 C24
C2
LED INDICATION OF SELF-DIAGNOSIS ON OUTDOOR UNIT
LED BLINKING
LED turns on Slow flashing (1 time for 2 seconds) Quick flashing (3 times for 2 seconds)
Example: NO.2 Compressor lock
on off 1.0sec 1.0sec 1.0sec0.6sec 0.6sec 0.6sec 1.0sec 1.0sec0.6sec 0.6sec 0.6sec0.6sec
NO.3 Overheat of the compressor
NO.
1 2 3 4
Normal Abnomal signal line Compressor lock  Overheat of the compressor DC overcurrent or overheat of the IPM
Short circuit of the thermistor Open circuit of the thermistor AC abnormal current AC overcurrent
LED indication pattern Mulfunction part or abnormal condition NO.
5 6 7 8
LED indication pattern Mulfunction part or abnormal condition
FAN MOTOR
BK BL BR GR
BLACK BLUE BROWN GRAY
: : : :
RE WH OR G(Y)
RED WHITE ORANGE
: : :
YE GN YELLOW
GREEN
: :
:GREEN-YELLOW
DIODE BRIDGE DIODE BRIDGE
DB1 DB2
OR ~~ ~~
REACTOR L2
50µF 200V
WH WH
1 4 RE YE
BL
RE C5
C10 GR
BK
C6
C8
BL BL
BL
150µF 400V 150µF 400V GRC9 BR
GR
YE
YE
C7
4700µF 63V T9 T7
WPE2 20A 250V
YE
YE
BL
BL
T10
T8
2000µF 400V 2000µF 400V
FC1
C29
POWER  TRANSISTOR MODULE (PM1)
U V W
BCN11
RE WH BK
COMPRESSORU(R)
V(S) W(C)
THERMISTOR COMPRESSOR TEMP.
THERMISTOR AIR. TEMP. THERMISTOR PIPE. TEMP.
TH3
TH1
TH2
GN OR
WH
L1

AH-X127E
AU-X127E
AY-X127E
AE-X127E
8
ELECTRICAL PARTS
For Model AH-X127E and AU-X127E
DESCRIPTION MODEL REMARKS SITE
Indoor fan motor ML-A486 220 - 240V, 50Hz 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, 50Hz 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
For Model AY-X127E and AE-X127E
DESCRIPTION MODEL REMARKS SITE
Indoor fan motor ML-A486 220 - 240V, 50Hz AY
Indoor fan motor capacitor – 430V, 1.5µF AY
Transformer – Primary; AC 230V, 50Hz AY
Secondary; AC14.6V, 50Hz
Fuse – 250V, 2.5A AY
Compressor KHV127FEM 3-PHASE Induction motor AE
Outdoor fan motor ML-A584 220 - 240V, 50Hz AE
Outdoor fan motor capacitor – 430V, 2.0µF AE
WPE1 – QFS-GA014JBE0(20A, 250V) AE
WPE2 – QFS-GA019JBE0(20A, 250V) AE
WPE3 – QFS-GA008JBE0(3A, 250V) AE

AH-X127E
AU-X127E
AY-X127E
AE-X127E
9
BLOCK DIAGRAMS
INDOOR UNIT for AH-X127E and AY-X127E
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

AH-X127E
AU-X127E
AY-X127E
AE-X127E
10
OUTDOOR UNIT for AU-X127E and AE-X127E
CPU
Test mode circuit
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
4-way valve relay 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
Outdoor temperature
thermo circuit Outdoor temperature thermistor
Compressor
Power 
transistor module
4-way valve (except for
the AU-X127E)
Outdoor fan
Smoothing
circuit Passive filter circuit
Filter
circuit Unit-unit
wiring (AC
power and
serial
signals)
20 A
protection
20 A protection
3 A
protection
Heat exchanger pipe
thermistor(option)
Outdoor temperature
thermistor(option)