Sharp AF-T908X User manual

1
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
AIR CONDITIONER
S6830AFR128X/
SERVICE MANUAL
Page
SPECIFICATIONS ................................................................................................................................................ 2
WIRING DIAGRAM ............................................................................................................................................... 3
EXTERNAL DIMENSIONS................................................................................................................................... 4
OPERATION INSTRUCTIONS ............................................................................................................................ 4
INSTALLATION INSTRUCTIONS ........................................................................................................................ 7
DISASSEMBLING PROCEDURE ...................................................................................................................... 10
HOW TO REPAIR REFRIGERATION................................................................................................................ 14
ELECTRICAL COMPONENT TEST.................................................................................................................... 16
MICROCOMPUTER CONTROL SYSTEM.......................................................................................................... 17
TROUBLESHOOTING GUIDE............................................................................................................................ 24
RUNNING CONDITION ...................................................................................................................................... 28
PACKING AND ACCESSORIES......................................................................................................................... 29
REPLACEMENT PARTS LIST............................................................................................................................ 30
TABLE OF CONTENTS
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
MODELS
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
In the interest of user-safety the air conditioner should be restored to
itsoriginalconditionandonlypartsidenticaltothosespecifiedshould
be used.

2
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X SPECIFICATIONS
Models AF-T908X, AF-R908X AF-R1108X AF-R1208X
Cooling capacity BTU/h 8500 10500 12000
Moisture removal Pints/h 2.1 3.0 3.8
ELECTRICAL DATA
Phase Single
Rated frequency Hz 60
Rated voltage Volts 115
Rated current Amps 8.0 10.2 11.9
Rated input Watts 850 1100 1300
Power factor % 92 94 95
EER BTU/Wh 10.0 9.5 9.2
COMPRESSOR
Type (Hermetically sealed rotary type)
Model, Remarks QB125CL22 A, 700W QK164CN22A, 890W QK189CN22A, 1050W
REFRIGERANT SYSTEM
Evaporator Louver fin, Grooved tube, 7mm, Hair pin
Condenser Louver fin, Bare tube, 7mm Hair pin Louver fin, Grooved tube, 7mm Hair pin
Control O.D. x I.D. x Length x Q'ty(mm) Capillary tube 2.7 x 1.4 x 650 x 1 Capillary tube 2.7 x 1.6 x 800 x 1 Capillary tube 2.7 x 1.2 x 650 x 2
Refrigerant volume R-22(OZ) 15.2(Factory charged) 14.6(Factory charged) 18.5(Factory charged)
NET DIMENSIONS
Width Height Depth inches(mm) 22-1/16(560) x 14-3/4(375) x 24-5/16(617)
Net Weight lbs 84 84 88
GROSS DIMENSIONS
Width Height Depth inches(mm) 22-25/32(655) x 18-29/32(480) x 27-7/8(708)
Gross Weight lbs 95 95 99
FAN SYSTEM
Indoor side(Evaporator) Centrifugal fan
Outdoor side(Condenser) Propeller fan
Air flow rate(indoor side) CFM (High/Med/Low) 275 / 223 / 198 (High/Med/Low) 293 / 265 / 237 (High/Med/Low) 286 / 258 / 230
OTHERS
Safety devices Compressor: Overload relay
Fan motor: Internal thermal fuse
Air filter Polypropylene net
Power cord length ft 4.3
Power plug type 125V, 15A

3
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
ELECTRICAL PARTS
Models AF-T908X,AF-R908X AF-R1108X AF-R1208X
Running capacitor 370V-35µF 370V-40µF 370V-60µF
Fan capacitor(indoor/outdoor) 250V-3µF/250V-6µF 250V-6µF/250V-6µF 250V-6µF/250V-6µF
Thermistor 15kΩat 78˚F
Fan motor RMLA046/RMLA045 RMLA044/RMLA043 RMLA044/RMLA043
Overload relay MRA12061-9201 MRA98965-9200 MRA12053-9200
Figure W-1 .
WIRING DIAGRAM
POWER SUPPLY CORD CONTROL BOARD UNIT
DISPLAY
BOARD 
UNIT
115V
60HZ
RIBBED
COMPRESSOR
NON
RIBBED 4A
125V
OVERLOAD
RELAY
GR
BK
BK
C1
1
2
3
4
3 5 7
R
RE WH
RUNNING
CAPACITOR
INDOOR
FAN MOTOR
FAN MOTOR
CAPACITOR
(INDOOR)
THERMAL
PROTECTOR
S
T1
RE OR WH
MRY OUT FU1 NR
BCN1
WIRE COLOR
BK : BLACK
BL : BLUE
RE : RED
WH : WHITE
GR : GREEN
GY : GRAY
OR : ORANGE
YELLOW
ORANGE
THERMISTOR
(ROOM TEMP.)
THERMISTOR
(PIPE TEMP.)
C1 TR
CN1 CN2 CN3
CN4
BCN2
BCN3
IN
GY
GR BK BL
A.C
HML
M.C
CNR1 CNR2 CNR3 CNR4 CNR5
RY1 RY2 RY3 RY4 RY5
GY
GY
135
OUTOOR
FAN MOTOR
FAN MOTOR
CAPACITOR
(OUTDOOR)
THERMAL
PROTECTOR
RE WH
GR BK BL
A.C
HL
M.C
GY
MEGGER TESTING
Check the resistance between connector terminal and motor shaft.
Reading must be more than 10MΩat DC 500V.
(2) Connect RED and GRAY wires to proper source and
make run test by rotating the motor shaft by hand.
MODEL
Indoor fan motor
MAIN COIL
SUB COIL
CON1
CON2
AF-R908X, AF-T908X
approx. 58.95 Ωapprox. 102.16 Ω
approx. 87.89 Ωapprox. 77.26 Ω
approx. 34.75 Ωapprox. 18.16 Ω
approx. 11.89 Ωapprox. 12.30 Ω
AF-T1108X, AF-T1208X
MODEL
Outdoor fan motor
MAIN COIL
SUB COIL
CON1
AF-R908X, AF-T908X
approx. 51.40 Ωapprox. 38.06 Ω
approx. 29.30 Ωapprox. 37.32 Ω
approx. 21.10 Ωapprox. 25.22 Ω
AF-T1108X, AF-T1208X
FAN MOTOR
(1) Using a volt-ohm-meter set on resistance range, check the resistance between the motor windings.
THERMAL 
PROTECTOR 
OFF 125˚C
BLACK
GRY
GRY
CAP
BLUE
Indoor fan motor
MAIN CON1
LOW
WHITE
HI
RED
115V, 60Hz
THERMAL 
PROTECTOR 
OFF 125˚C
BLACK
SUB
CAP
BLUE
Outdoor fan motor
MAIN
SUB
CON1 CON2
LOW
WHITE
MID
ORANGE
HI
RED
115V, 60Hz

4
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X EXTERNAL DIMENSIONS
24-5/16"
5-3/16"
14-3/4"
19/32" 1-3/8"
16-23/32"
22-1/16"
38-19/32"
27-5/32"
OPERATION INSTRUCTIONS
PARTS NAMES
UNIT
1
Front panel
2Air inlet (Indoor side)
3Louvers
4Air outlet (Indoor side)
5Exhaust lever
6Control panel
7Cabinet
8Air outlet (Outdoor side)
9Air inlet (Outdoor side)
0Filter (Pull the filter handle to the right to remove.)
qFilter handle
wPower cord
8
12
1
2
3
456
7
9
10
11

5
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
F
hr
HIGH COOL
MED COOL
LOW COOL
FAN ONLY
SELECTOR
ENERGY
SAVER
POWER
ON/OFF
TIMER
ON/OFF
TEMP.
3
5
6
7
8
9
10
11
12
12
4
13
CONTROL PANEL
11
11
1Display
22
22
2SELECTOR indicator
33
33
3SELECTOR pad
44
44
4POWER indicator
55
55
5POWER ON/OFF pad
66
66
6TEMPERATURE and TIMER setting pad
""
""
" ••••Temp. lower or time reverse
''
''
' ••••Temp. raise or time advance
77
77
7TEMPERATURE indicator
88
88
8TEMPERATURE pad
99
99
9TIMER indicator
00
00
0TIMER ON/OFF pad
qq
qq
qENERGY SAVER indicator
ww
ww
wENERGY SAVER pad
ee
ee
eReceiver window for remote control signal
(Models AF-R908X, AF-R1108X and
AF-R1208X only)
COOLING OPERATION
PROCEDURE PAD DISPLAY / INDICATOR
1. Touch POWER ON/OFF pad.
•The unit is preset at 74 °F and HIGH COOL.
This will show in display when first turned
on.
2. Touch POWER ON/OFF pad again.
• The unit will stop operating.
•POWER indicator, SELECTOR indicator
(HIGH COOL) and TEMPERATURE
indicator will light.
• POWER indicator, SELECTOR indicator
andTEMPERATURE indicatorwillgo off.
F
hr
POWER
ON/OFF
POWER
ON/OFF
TO CHANGE TEMPERATURE SETTING
PROCEDURE PAD DISPLAY / INDICATOR
•Display will change as you touch the
pad.
• TEMPERATURE indicator will light.
F
hr
F
hr
During cooling operation
1. Touch TEMPERATURE pad.
2. TouchTEMPERATUREandTIMERsettingpad
to adjust temperature setting.
•It can be set within the range of 64°F to 86°F.
TEMP.
'•••Lower temp.
setting.
"•••Raise temp.
setting.
The latest temperature setting will be memorized and will appear on the display the next time it's turned on.
NOTE: In cases of power outages or when unit is disconnected; when the power is restored or unit is plugged in, the unit
and display will return to the preset conditions of 74 °F and HIGH COOL.
However the unit will not automatically turn back on.

6
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
NOTES ON FAN SPEED
Fan and cooling at maximum performance.
Unit is preset at factory to HIGH COOL.
Fan operates at medium speed; cooling power at medium.
Cooling for sleeping comfort with low fan speed.
FAN ONLY OPERATION
This setting can be used to circulate air whenever cooling is not desired.
The fan will operate at medium speed.
PROCEDURE PAD DISPLAY / INDICATOR
TO CHANGE FAN SPEED
SELECTOR
During operation
Touch SELECTOR pad and select the desired fan
speed.
•SELECTOR indicator will light in order
as you touch.
HIGH COOL
MED COOL
LOW COOL
FAN ONLY
HIGH COOL
MED COOL
LOW COOL
PROCEDURE PAD DISPLAY / INDICATOR
•SELECTOR indicator FAN ONLY will
light. After 10 seconds, the compressor
will stop and the unit will operate in FAN
ONLY mode.
During operation
Touch SELECTOR pad and select FAN ONLY.
SELECTOR
The fan speed setting or FAN ONLY setting of the latest speed will be memorized and will light the next time unit is turned
on.
ENERGY SAVER
During normal operation, the thermostat automatically controls cooling and the fan runs continuously whenever the air
conditioner is in operation. When the ENERGY SAVER is set, the thermostat automatically controls cooling and the fan
automatically stops when the compressor is not operating. (Fan will stop in 30 seconds after the compressor stops.)
PROCEDURE PAD DISPLAY / INDICATOR
ENERGY
SAVER
• ENERGY SAVER indicator will light.
• ENERGY SAVER indicator will go off.
ENERGY
SAVER
During cooling operation
1. Touch ENERGY SAVER pad.
2. To cancel, touch
ENERGY SAVER pad again.
NOTE : ENERGY SAVER cannot be set during FAN ONLY mode operation.

7
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
CHANGING AIR FLOW DIRECTION
Adjustthelouverstochangethedirectionofairflow
for uniform and efficient cooling of the room.
EXHAUST
If air in your room is stale, set the EXHAUST
lever to the OPEN position. This will exhaust
stale air to the outside. The EXHAUST lever
shouldnormallybekeptintheCLOSEDposition
during cooling for maximum efficiency.
ITEMS PACKED WITH THIS UNIT
No. Accessories Q'ty
1Right closure assembly 1
2Left closure assembly 1
3Window sash foam seal 1
4Window sash foam seal
(adhesive type) 1
5Bottom gasket 1
6Screws L=1", (25.4mm) 8
7Screws L=13/32", (10mm) 6
8only for models Remote control 1
9AF-R908X Battery 2
0AF-R1108X Remote control hook 1
AF-R1208X
qFront panel assembly 1
1
2
x 8
6
8
3
45
x 6
7
9
x 2
10
11
SUGGESTED TOOLS
1. Screw driver (medium size Phillips) 2. Tape measure or ruler 3. Knife or scissors
INSTALLATION
NOTE:Thesemodelscanalsobeinstalledthroughthewallwiththeoptionalthroughthewallmountingkit,modelAZ-80WK.
To order this kit either contact your dealer or call 1-800-BE-SHARP. The wall opening dimensions for through the
wall installation are: 25" (635mm) (W) x 17 1/4 " (438mm) to 17 3/4" (451mm) (H) x 4" (102mm) minimum (D).
Complete instructions are included with the wall mounting kit.
WARNING: Make sure the unit is turned off and unplugged
before working.
1-1. Cut the window sash foam seal (adhesive type) to the proper length and
attach it to the underside of the window sash.
1-2. Attach the bottom gasket to the outer side of the window sill.
bottom gasket
window sash foam seal
(adhesive type)
CLOSED OPEN
EXHAUST Lever
Vertical louvers
Adjusts LEFT/RIGHT air flow
Horizontal louvers
Adjusts UP/DOWN air flow
INSTALLATION INSTRUCTIONS

8
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
Front panel
Screws
Remove the pad.
Closure assembly
3-1. Unscrew the 6 stopper screws of the cabinet. Keep the 4
screws from the top and front , as they will be used later.
3-2. Slide the chassis out from the cabinet by pulling on the hand
hold located at the bottom center of the chassis.
3-3. Remove the pad in side of the compressor.
CAUTION: Do not remove any material (ex. styrofoam, etc.) from
inside the unit.
4. Insert the right closure assembly and the left closure assembly
into the top angle and the bottom channels.
Secure the right and left closure to the cabinet with 6 of the
provided screws. (L= 13/32", 10 mm)
5. Open the window sash and place the cabinet on the sill. The
cabinet should be inclined backward by approx. 3/8 inch (9.5
mm).
Close the window sash securely behind the top angle.
6. Insert the closure assemblies on both sides into the rails of
the jamb.
About
3/8inch(9.5mm)
Indoor
side
Jamb
(Left)
Sill
1/2 inch (13mm)
Closure assembly
(Left)
Stool
Closure assembly
(Left)
2. Open the box of the front panel assembly and take out the front
panel and 2 screws.

9
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
INSTALLATION INSTRUCTIONS
Top angle
7-1. Secure the cabinet to the window stool with 3 screws (L=1", 25.4 mm),
working from the inside of the cabinet.
7-2. Securethe topangleandthe closureassembliestothe windowsashwith
3 screws (L=1", 25.4 mm).
7-3. Secure the closure assemblies to the sill with 2 screws (L=1", 25.4 mm).
8-1. Slide the chassis back into the cabinet.
8-2. Replace the 4 screws removed in step 3 to the top and side of the
cabinet.
10.Cut the window sash foam seal to the proper length and seal the
opening be- tween the top of the inside window sash and the outside
window sash. Window sash foam seal
9-1. Replace the front panel. Slip the exhaust lever through the opening
betweenhorizontal louver and frontpanel,andthenhook the cabinet top.
CAUTION: Take care not to damage the exhaust lever with the front
panel.
9-2. Screw the front cabinet on at the bottom corners with 2 screws removed
in step 2.
Exhaust Lever
Front
Panel
Horizontal
Louver

10
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X DISASSEMBLING PROCEDURE
CAUTION: DISCONNECT THE ROOM AIR CONDITIONER FROM THE POWER SUPPLY BEFORE ANY SERVICE
1. Unscrewthetwoscrewsholdingthe front panel on each
side.
2. Remove the front panel by pulling it at the lower corner
toward you about 1 inch and next lift up and pull it
toward you.
3. Unscrew the four screws holding the cabinet.
Two screws are on top side.
Two screws are on each side.
4. Slide the chassis away from the cabinet by pulling on
each corner of the base pan.
5. Unscrew the four screws holding the control unit.
Two screws are on front side.
Two screws are on right side.
6. Unscrew the one screw holding the power supply cord.
7. Pull out thermistor holder.
8. Unscrew the one screw holding earth wire code.