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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
SERVICE MANUAL
ROOM AIR CONDITIONERS
MODELS
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.
TABLE OF CONTENTS
SHARP CORPORATION
1
SPLIT TYPE
INDOOR UNIT
AH-S327W2
OUTDOOR UNIT
AU-S327W2
AH-S327W2
AU-S327W2
S5712AHS327W2
Page
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Summary of Contents for Sharp AH-S327W2
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Page 1: Table Of Contents
AH-S327W2 AU-S327W2 SERVICE MANUAL S5712AHS327W2 SPLIT TYPE ROOM AIR CONDITIONERS INDOOR UNIT AH-S327W2 MODELS OUTDOOR UNIT AU-S327W2 In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. -
Page 2: Specifications
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 Electrical data Phase Single Rared frequency Rated voltage range 198 to 242 Rated voltage Rated current 8.6(2.9 ~ 9.9) at 33 ~ 110Hz, 5.1 at 60Hz... -
Page 3: External Dimensions
AH-S327W2 AU-S327W2 EXTERNAL DIMENSIONS 19.5 Length unit (mm) Figure E-1. INDOOR UNIT 10.5 59.5 69.5 Figure E-2. OUTDOOR UNIT... -
Page 4: Wiring Diagrams
AH-S327W2 AU-S327W2 WIRING DIAGRAMS... - Page 5 AH-S327W2 AU-S327W2...
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Page 6: Electrical Parts
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 Indoor fan motor capacitor – 430V, 1.5µF Transformer – Primary; AC 230V, 50Hz Secondary; AC14.6V, 50Hz Fuse – 250V, 2.5A... -
Page 7: Block Diagram
AH-S327W2 AU-S327W2 BLOCK DIAGRAMS INDOOR UNIT for AH-S327W2 2.5 A DC power supply circuit AC power FUSE Fan motor phase control circuit Room fan motor Rotation pulse input circuit Fan motor pulse detect AC clock circuit Flow direction control Louver motor drive circuit... - Page 8 AH-S327W2 AU-S327W2 OUTDOOR UNIT for AU-S327W2 20 A Power supply Unit-unit protection Smoothing Filter circuit (built wiring (AC circuit circuit into IPM) power and serial signals) CPU oscillator circuit protection Outdoor fan relay drive Outdoor fan circuit Power transistor module...
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Page 9: Microcomputer Control System
AH-S327W2 AU-S327W2 MICROCOMPUTER CONTROL SYSTEM... - Page 10 AH-S327W2 AU-S327W2...
- Page 11 AH-S327W2 AU-S327W2 FB031 FROM LOUVER MOTOR FROM MOTOR FROM TERMINAL TERMINAL BOARD " 3 " BOARD " 1 " FROM MOTOR TERMINAL BOARD " 2 " FROM POWER SUPPLY CORD " BLACK " Figure L-4 Printed Wiring Board for AH-S327W2...
- Page 12 AH-S327W2 AU-S327W2 BLUE GRAY QPWBFB059JBE0-B Figure L-5 Printed Wiring Board for AU-S327W2...
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Page 13: Functions
AH-S327W2 AU-S327W2 FUNCTIONS (1) Cooling 1. INDOOR UNIT If the room temperature is in the c zone when 1-1 Temperature Adjustment operation begins,proportional/integral control is not a. Normal control performed, and the machine runs at frequency code 9 power until the h zone is reached. When the... - Page 14 AH-S327W2 AU-S327W2 Set temperature Cooling By fuzzy computing Set the shift up time Final (Cooling setting + 1°C) Same as above (Final setting + 1°C) *During Cooling / Dry e, f zone Timer set time g zone h zone i zone...
- Page 15 AH-S327W2 AU-S327W2 1-11 Compressor relay RY1 (1) It is ON during operation, and when operation is stopped, goes OFF after a delay of 100 seconds (not immediately). (2) The minimum OFF time of the relay is 80 seconds. It will not go ON again before 80 seconds elapses.
- Page 16 AH-S327W2 AU-S327W2 2. OUTDOOR UNIT 2-1 Frequency control 2-2 Overcurrent protection (1) Compressor lock detection (1) AC current peak control If the set value (4.25 A) of AC current is exceeded at 17 This control lowers the compressor frequency if the AC to 30 Hz when operation begins, operation is stopped.
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Page 17: Function And Operation Of Protective Procedures
AH-S327W2 AU-S327W2 FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES Operation Self diagnostic display Function Description Detection Restart Restart Indoor Outdoor time condition times Indoor fan Stops operation if no revolution pulse When indoor Operation OFF No limit lock signal is input from the indoor fan motor for fan is revolving one minute. - Page 18 AH-S327W2 AU-S327W2 Operation Self diagnostic display Function Description Detection Restart Restart Indoor Outdoor time condition times Compressor Lowers the operating frequency if the During Automatically No limit overheating temperature of the compressor chamber compressor restarts after safety control thermistor (TH1) rises above 105 ~ 107°C.
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Page 19: Breakdown Diagnosis Procedure
AH-S327W2 AU-S327W2... - Page 20 AH-S327W2 AU-S327W2...
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Page 21: Refrigeration Cycle
Strainer Outdoor unit Capillary tube Silencer Compressor Condensor Accumulator Figure R-1. Refrigeration Cycle for AH-S327W2 Standard conditions: AH-S327W2 Indoor side Outdoor side Dry-bulb Temp. (˚C) Relative Humidity (%) Dry-bulb Temp. (˚C) Relative Humidity (%) Cooling Temperature at each part and pressure in 3-way valve... -
Page 22: Performance Curves
PERFORMANCE CURVES NOTE: 1) Indoor fan speed: Hi 2) Vertical adjustment louver "45˚", Horizontal adjustment louver "front" 3) Indoor air temp. : Colling 27˚C (Running frequency: 99HZ) 1800 1600 1400 1200 Outside air temp.(˚C) Figure P-1. At Cooling for AH-S327W2... -
Page 23: Disassembling Procedure
AH-S327W2 AU-S327W2 DISASSEMBLING PROCEDURE FOR INDOOR UNIT MODEL AH-S327W2 CAUTION: DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING 1. Using the narrow slotted screwdriver or similar, remove 3. Open the open panel, and remove the two air filters. - Page 24 AH-S327W2 AU-S327W2 9. Remove the control box cover. 6. After closing the open panel, open the horizontal adjustment louver and pull out the bottom of the front Holding its bottom, pull and disengage the upper hook panel toward you. toward the bottom.
- Page 25 AH-S327W2 AU-S327W2 12. Remove the thermostat of the evaporator. 15. Remove the indicator assembly. (Pull it out after peeling off the thermoseal.) (Push up the lower hook, and the indicator will be ready for removal.) 13. Cut the tie band of the lead wire.
- Page 26 AH-S327W2 AU-S327W2 18. Turn the cap area of the drain hose counterclockwise, 21. Move the evaporator to the up, and release it from one and remove it from the drain pan. projection of cabinet. Free the evaporator, and pull down the cross-flow fan and motor toward you.
- Page 27 AH-S327W2 AU-S327W2 <Cautionary points for assembling the fan> How to remove the electric control box. a. When inserting the shaft of the cross-flow fan into the 1. Remove the fastening screw of the terminal board. metal, take care to prevent injuring the inner surface of the metal.
- Page 28 AH-S327W2 AU-S327W2 Drain pan and related 3. Remove the thermostat holder from the control box. How to remove the louver motor. Remove two screws which fasten the louver motor. 4. Remove the fastening screw of the board. How to remove the horizontal adjustment louver Slightly fall down the hinge area, deflect the louver, and remove it at one place.
- Page 29 AH-S327W2 AU-S327W2 SERVICING PROCEDURE FOR OUTDOOR UNIT MODEL AU-S327W2 CAUTION: DISCONNECT THE UNIT FROM THE POWER SUPPLY BEFORE ANY SERVICING 1. Remove one screw which is fixing the control box cover. 4. Remove two screws which are fixing left side of the front panel.
- Page 30 AH-S327W2 AU-S327W2 7. Remove five screws which are fixing right side of the rear cabinet. 10. Remove two screws which are fixing the control box. 8. Remove one screw which is fixing left side of the rear 11. Disconnect following connectors.
- Page 31 AH-S327W2 AU-S327W2 12. Cut the band. 15. Remove two screws which are fixing heat insulator assembly. And take it out. 13. Disconnect five wires from the control box to the reactor 16. Remove two screws which are fixing bulkhead. And take and capacitors.
- Page 32 AH-S327W2 AU-S327W2 18. Take out the compressor cover. 19. Take out the thermistor from the tube. [Fan motor angle] 20. Remove two screws which are fixing the fan motor. And take it out.
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Page 33: Replacement Parts List
AH-S327W2 AU-S327W2 REPLACEMENT PARTS LIST(AH-S327W2) REF. NO. PART NO. DESCRIPTION Q'TY CODE CABINET AND UNIT PARTS CMOT-A263JBK0 Fan motor sub assembly PGUMMA071JBE0 Motor cushion CHLD-A050JBK0 Bearing assembly DCHS-A271JBK0 Cabinet assembly NFANCA066JBE0 Closs flow fan CSRA-A424JBK0 Drain pan assembly QW-VZC597JBE0 Louver motor wire... - Page 34 AH-S327W2 AU-S327W2 REF. NO. PART NO. DESCRIPTION Q'TY CODE ACCESSORY PARTS CRMC-A450JBE0 Remote controller FCOV-A032JBFC Screw cover LX-NZ0247JBE0 Special nut XTTSF40P20000 Tapping screw GLEGGA008JBE0 Anti-vibration rubber PPLTNA041JBP0 Mounting plate XTTSD45P30000 Long screw TINS-A471JBR0 Installation manual 4-10 TINSCA014JBR0 Operation manual 4-11...
- Page 35 AH-S327W2 AU-S327W2 INDOOR UNIT AH-S327W2 4-10 1-34 1-33 1-41 3-10 1-37 1-35 1-36 1-32 1-38 1-42 2-10 1-39 1-26 1-11 1-31 1-12 1-32 1-10 1-29 1-24 1-30 1-23 1-22 1-20 1-13 1-28 1-19 4-11 1-15 1-17 1-25 1-16 1-18 1-14...
- Page 36 AH-S327W2 AU-S327W2 REPLACEMENT PARTS LIST(AU-S327W2) REF. NO. PART NO. DESCRIPTION Q'TY CODE CABINET AND UNIT PARTS CMOTLA584JBE0 Fan motor PSEL-A936JBE0 Motor insulator LANGKA059JBP0 Fan motor angle PSEL-A978JBE0 Gcon insulator PSEL-A979JBE0 Gcon insulator LANG-A265JBP0 Heat insulator CBND-A005JBY0 Capacitor clamp assembly RC-AZA066JBE0 Electrolytic cap.
- Page 37 AH-S327W2 AU-S327W2 REF. NO. PART NO. DESCRIPTION Q'TY CODE 3-16 LX-NZA081JBE0 Bonnet 3-17 LX-NZA037JBE0 Special nut SCREWS AND NUTS LX-BZA072JBE0 Special screw LX-NZA026JBE0 Special nut LX-BZA075JBE0 Special screw LX-BZA175JBE0 Special screw LX-NZA135JBE0 Special nut XTSSF40P12000 Tapping screw HOW TO ORDER REPLACEMENT PARTS To have your order filled prompty and correctly, please furnish the following information.
- Page 38 1-38 1-31 1-39 1-35 1-30 1-29 1-33 1-34 1-28 3-17 1-27 3-10 3-16 1-26 3-15 3-13 1-14 1-12 1-11 1-25 1-15 3-12 3-14 3-11 1-13 1-18 1-16 1-17 1-40 1-19 OUTDOOR UNIT AU-S327W2 '97 SHARP CORP. (5U0.11E) Printed in Japan...