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Model
AU-X108
Pages
56
Size
3.92 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
au-x108.pdf
Date
PREV: Sharp AU-X10 (serv.man18) Service Manual / Technical Bulletin

Sharp AU-X108 Service Manual ▷ View online

AH/AU-X108E
AY/AE-X108E
AH/AU-X138E
AY/AE-X138E
33
1
sec..
1
sec
0.6
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
0.6
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
1
sec.
0.6
sec.
0.6
sec.
1
sec.
0.6
sec.
1
sec.
0.6
sec.
100
80
60
40
20
0
-10
0
10
20
30
40
Resistance
Thermistor
Room temperature
Heat exchange
Color
Yellow
Orange
To measure the resistance, first remove 
the soldering as shown at right.
Room temperature 
thermistor TH1
Heat exchange 
thermistor TH2
Tester
Tester
CN4
1
4
1 time
Compressor lock
Overheat of the compressor
2 times
ON
OFF
ON
OFF
Signal
No. 1 to No.  2
No. 3 to No.  4
Figure 1     Temperature properties of  indoor thermistors
500K
400K
300K
200K
100K
0
-20
0
20
60
80
100
120
3.06K
5.78K
4.17K
2.28K
1.72K
1
4
40K
30K
20K
10K
0
-20
0
20
60
40
1
4
Figure 2     Temperature properties of outdoor thermistors
Connector
CN8
Connector
CN8
AU-X138E
AU-X108E 
AU-X138E
AU-X108E 
1
6
AE-X138E
AE-X108E 
TH2, TH3 heat exchange thermistor
TH1 compressor thermistor
TH2
Connector
CN8
Temperature (
°
C)
Temperature (
°
C)
Tester
Tester
Thermistor
To measure the 
resistance, first 
remove the 
connector from the 
board. 
Color
No.
 Connector
Compressor
thermistor
Heat exchanger
pipe thermistor
Outdoor temp.
thermistor
TH1
TH2
TH3
 No. 1 to 2
 No. 3 to 4
White
Orange
 No. 5 to 6
Green
Connector
CN8
1
6
AE-X138E
AE-X108E 
Microcomputer 
terminal
Input
signal
To Outdoor control board
Adaptor
(GND)
(R31)
0        Low input
1        High input
TEST 1)Pin No. 42
TEST 2)Pin No. 43
1
0
K
Heat exchange thermistor 
TH2 (orange)
25
°
C resistance 15 K 
Room temperature 
thermistor TH1 (yellow)
25
°
C resistance 10 K
25
°
C resistance
45 K
Resistance (    )
Resistance (    )
0
°
C resistance
14.5 K
25
°
C resistance
4.428 K
1
4
32
33
6
C23
C20
JP10
OSC1
CN
Cool / 40Hz
R31
R32
JP1
JP9
JP11
C17
JP13
JP14
R21
AE-X138E, AU-X138E
11
64
Cool / 40Hz
(QFS-GA015JBE0)
LED1
JP9
JP10
JP11
C44
IC1
C45
C46
D10
JP20
JP8
Q10
E
C
B
Q9
E
C
B
D11
CN10
R32
R31
R30
R33
AE-X108E, AU-X108E
Cautions when attaching or removing the board
When oper
ating only the outdoor unit (cooling 40 Hz fix
ed mode) 
T
o mak
e 
only the outdoor unit r
un in cooling mode
, shor
t the places mar
k
ed with 
arro
ws belo
w with an adaptor
, and apply a v
oltage of 220 ~ 240 
V A
C to 1 
and N on the ter
minal board.
 
(A
v
oid oper
ating the outdoor unit alone f
or long per
iods of time
.)
AH/AU-X108E
AY/AE-X108E
AH/AU-X138E
AY/AE-X138E
34
REFRIGERANT CYCLE
1
2
Capillary tube
3
Outdoor unit
Condensor
Evaporator
Indoor unit
Compressor
Flare coupling
Flare coupling
Silencer
4
valve
valve
Accumulator
Figure R-1. Refrigeration Cycle for AH-X108E/AH-X138E
1
4
C
2
Accumulator
3
Strainer
Outdoor unit
Condensor
Evaporator
Reverse valve
Comp-
ressor
Valve
Valve
Silencer
Cooling
Heating
Coil
Capillary 
tube A
Capillary 
tube B
Flare coupling
Indoor unit
Flare coupling
s
Figure R-2. Refrigeration Cycle for AY-X108E
Figure R-3. Refrigeration Cycle for AY-X138E
Indoor side 
Standard conditions: 
Dry-bulb Temp. (˚C)
Relative Humidity (%)
27
Cooling
47
Outdoor side 
Dry-bulb Temp. (˚C)
Relative Humidity (%)
35
40
AH-X108E, AH-X138E  
1
4
C
2
Accumulator
3
Strainer
Outdoor unit
Condensor
Evaporator
Reverse valve
Comp-
ressor
Valve
Valve
Silencer
Cooling
Heating
Coil
Capillary 
tube A
Flare coupling
Indoor unit
Flare coupling
s
AH/AU-X108E
AY/AE-X108E
AH/AU-X138E
AY/AE-X138E
35
Temperature at each part and pressure in 3-way valve
Operation 
mode
Cool
(Max.)
Cool
1
2
3
4
3-way valve
pressure
(kg/cm
2
 G)
97˚C
43˚C
14˚C
16˚C
5.2
72˚C
43˚C
15˚C
11˚C
6.1
75
50 settle
AH-X108E
No.
Hz
Operation 
mode
Cool
(Max.)
Cool
1
2
3
4
3-way valve
pressure
(kg/cm
2
 G)
97˚C
43˚C
14˚C
13˚C
4.9
73˚C
42˚C
16˚C
17˚C
6.6
94
50 settle
AH-X138E
No.
Hz
Capillary tube
O.D
I.D.
L
ø2.7
ø1.5
800
AH-X108E
Capillary tube
O.D
I.D.
L
ø2.7
ø1.6
500
AH-X138E
Dimension of Capillary tube
Indoor side 
Standard conditions: 
Dry-bulb Temp. (˚C)
Relative Humidity (%)
27
20
Cooling
Heating
47
Outdoor side 
Dry-bulb Temp. (˚C)
Relative Humidity (%)
35
7
40
87
AY-X108E, AY-X138E
Temperature at each part and pressure in 3-way valve
Operation 
mode
Cool
(Max.)
Heat
(Max.)
Cool
Heat
1
2
3
4
3-way valve
pressure
(kg/cm
2
 G)
98˚C
43˚C
14˚C
16˚C
5.0
96˚C
0˚C
35˚C
2˚C
18.4
72˚C
43˚C
15˚C
11˚C
6.0
59˚C
2˚C
32˚C
 2˚C
13.1
75 
more
 than
95
50 
settle
50 
settle
AY-X108E
No.
Hz
Operation 
mode
Cool
(Max.)
Heat
(Max.)
Cool
Heat
1
2
3
4
3-way valve
pressure
(kg/cm
2
 G)
98˚C
43˚C
14˚C
13˚C
4.6
104˚C
2˚C
35˚C
7˚C
17.6
73˚C
42˚C
16˚C
17˚C
6.5
58˚C
3˚C
31˚C
 3˚C
12.3
94 
more
 than
100
50 
settle
50 
settle
AY-X138E
No.
Hz
Capillary tube
O.D
I.D.
L
ø2.7
ø1.5
800
AY-X108E
Dimension of Capillary tube
Capillary tube A
O.D
I.D.
L
ø2.7
ø1.6
500
Capillary tube B
ø2.7
ø1.7
300
AY-X138E
AH/AU-X108E
AY/AE-X108E
AH/AU-X138E
AY/AE-X138E
36
Figure P-3 At Heating for AY-X108E
Figure P-2 At Cooling for AY-X108E
25
30
35
40
2.4
2.6
2.8
3.0
3.2
12
14
16
700
800
900
1000
(Running frequency: 61Hz)
Cooling capacity(kW)
Outside air temp.(˚C)  
Input(W)
Outlet air temp.(˚C)
-5
0
5
10
2.5
3.0
3.5
4.0
35
30
40
45
800
900
1000
1100
(Running frequency: 76Hz)
Heating capacity(kW)
Outside air temp.(˚C)  
Input(W)
Outlet air temp.(˚C)
PERFORMANCE CURVES
25
30
35
40
2.4
2.6
2.8
3.0
3.2
12
14
16
700
800
900
1000
Cooling capacity(kW)
Outside air temp.(˚C)  
Input(W)
Outlet air temp.(˚C)
1) Indoor fan speed: Hi
2) Vertical adjustment louver "45˚", Horizontal adjustment louver "front" 
3) Indoor air temp. : Cooling 27˚C
NOTE: 
(Running frequency: 61Hz)
Figure P-1. At Cooling for AH-X108E
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