Sharp AH-X127E Service Manual

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

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.

SHARP CORPORATION

SPLIT TYPE

INDOOR UNIT

AH-X127E

AY-X127E

OUTDOOR UNIT

AU-X127E

AE-X127E

AH-X127E

AU-X127E

AY-X127E

AE-X127E

S4709AYX127E/

Page

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Summary of Contents for Sharp AH-X127E

Page 1: Table Of Contents
AH-X127E AU-X127E AY-X127E AE-X127E SERVICE MANUAL S4709AYX127E/ SPLIT TYPE ROOM AIR CONDITIONERS INDOOR UNIT AH-X127E MODELS AY-X127E OUTDOOR UNIT AU-X127E AE-X127E 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-X127E AU-X127E AY-X127E AE-X127E SPECIFICATIONS Models INDOOR UNIT OUTDOOR UNIT AH-X127E AU-X127E Cooling capacitor 3.5 (1.4 3.8) Moisture removal Liters/h Electrical data Phase Single Rared frequency Rated voltage range 198 to 264 Rated voltage 220 - 240 Rated current 7.9 - 7.5...
Page 3 AH-X127E AU-X127E AY-X127E AE-X127E Models INDOOR UNIT OUTDOOR UNIT AY-X127E AE-X127E Cooling capacitor 3.5 (1.4 3.8) Heatpump 4.5 (1.4 5.7) Heating capacitor Moisture removal Liters/h Electrical data Phase Single Rared frequency Rated voltage range 198 to 264 Rated voltage 220 - 240...
Page 4: External Dimensions
AH-X127E AU-X127E AY-X127E AE-X127E EXTERNAL DIMENSIONS 19.5 Length unit (mm) Figure E-1. INDOOR UNIT 10.5 Length unit (mm) 59.5 69.5 Figure E-2. OUTDOOR UNIT...
Page 5: Wiring Diagrams
AH-X127E AU-X127E AY-X127E AE-X127E WIRING DIAGRAMS...
Page 6 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 7 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 8: Electrical Parts
AH-X127E AU-X127E AY-X127E AE-X127E ELECTRICAL PARTS For Model AH-X127E and AU-X127E DESCRIPTION MODEL REMARKS SITE Indoor fan motor ML-A486 220 - 240V, 50Hz Indoor fan motor capacitor – 430V, 1.5µF Transformer – Primary; AC 230V, 50Hz Secondary; AC14.6V, 50Hz Fuse –...
Page 9: Block Diagram
AH-X127E AU-X127E AY-X127E AE-X127E BLOCK DIAGRAMS INDOOR UNIT for AH-X127E and AY-X127E 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...
Page 10 AH-X127E AU-X127E AY-X127E AE-X127E OUTDOOR UNIT for AU-X127E and AE-X127E 20 A Power supply Unit-unit protection Smoothing Passive filter Filter circuit (built wiring (AC circuit circuit circuit into IPM) power and serial signals) CPU oscillator circuit protection Outdoor fan relay drive...
Page 11: Microcomputer Control System
AH-X127E AU-X127E AY-X127E AE-X127E MICROCOMPUTER CONTROL SYSTEM...
Page 12 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 13 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 14 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 15 FROM LOUVER MOTOR FROM MOTOR FROM TERMINAL TERMINAL BOARD 4P " 2 " BOARD 4P " 1 " FROM MOTOR TERMINAL BOARD 4P " N " FROM TERMINAL BOARD 3P " L " Figure L-4 Printed Wiring Board for AH-X127E...
Page 16 AH-X127E AU-X127E AY-X127E AE-X127E BLUE GRAY QPWBFB034JBE0-B Figure L-5 Printed Wiring Board for AU-X127E...
Page 17 AH-X127E AU-X127E AY-X127E AE-X127E FB029 FROM LOUVER MOTOR FROM MOTOR FROM TERMINAL TERMINAL BOARD 4P " 2 " BOARD 4P " 1 " FROM MOTOR TERMINAL BOARD 4P " N " FROM TERMINAL BOARD 3P " L " Figure L-6 Printed Wiring Board for AY-X127E...
Page 18 AH-X127E AU-X127E AY-X127E AE-X127E BLUE GRAY QPWBFB033JBE0-B Figure L-7 Printed Wiring Board for AE-X127E...
Page 19 AU-X127E AY-X127E AE-X127E FUNCTIONS b. Initial control AH-X127E is not provided with the heating The initial frequency is determined as shown in the function. tables below based on the difference between the temperature adjustment setting at the beginning of operation and the room temperature.
Page 20 AH-X127E AU-X127E AY-X127E AE-X127E 1-2 Indoor fan control COOLING This control uses the thermistor for the indoor heat Fan speed : High / Med / Low exchanger to control cold air blowing prevention, the indoor fan, and overheating prevention. (˚C)
Page 21 AH-X127E AU-X127E AY-X127E AE-X127E 1-5 ON-timer The ON-timer is set by pressing the ON-timer button. In order to attain the set temperature at the set time, the operation starting time is corrected by neuro and fuzzy computing one hour before the set time.
Page 22 AH-X127E AU-X127E AY-X127E AE-X127E One-hour operation (1) It is ON during operation, and when operation is If this button is pressed when operation is stopped, stopped, goes OFF after a delay of 100 seconds operation will begin and then stop after 1 hour.
Page 23 AH-X127E AU-X127E AY-X127E AE-X127E AU-X127E is not provided with the heating function. 2. OUTDOOR UNIT 2-1 Defrost operation (1) Overview Defrosting begins during heating if the conditions for compressor operation time and the defrosting zone are met. When defrosting begins, the indoor and outdoor fans stop.
Page 24 AH-X127E AU-X127E AY-X127E AE-X127E 2-2 Frequency control (1) AC current peak control This control lowers the compressor frequency if the AC current exceeds the set values. If the current is below the set values, the compressor frequency will not be raised above that frequency, as the maximum frequency, for 1 minute.
Page 25 AH-X127E AU-X127E AY-X127E AE-X127E 2-3 Overcurrent protection (1) Compressor lock detection If the set value (4.25 A) of AC current is exceeded at 17 to 30 Hz when operation begins, operation is stopped. In this case, the compressor outdoor fan does not stop, and 170 seconds after operation is stopped, another try will be made.
Page 26: Function And Operation Of Protective Procedures
AH-X127E AU-X127E AY-X127E AE-X127E 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 27 AH-X127E AU-X127E AY-X127E AE-X127E 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 thermistor (TH1) rises above 105 ~107°C.
Page 28 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 29: Breakdown Diagnosis Procedure
AH-X127E AU-X127E AY-X127E AE-X127E...
Page 30 AH-X127E AU-X127E AY-X127E AE-X127E...
Page 31: Refrigeration Cycle
Indoor unit Evaporator Flare coupling Flare coupling valve valve Strainer Outdoor unit Capillary tube Silencer Compressor Condensor Accumulator Figure R-1. Refrigeration Cycle for AH-X127E Indoor unit Evaporator Flare coupling Flare coupling Valve Valve Silencer Strainer Outdoor unit Capillary Accumulator tube A...
Page 32 AH-X127E AU-X127E AY-X127E AE-X127E Standard conditions: AH-X127E 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 AH-X127E Operation Cool Cool mode (Max.) 50 settle 107˚C...
Page 33 AH-X127E AU-X127E AY-X127E AE-X127E Standard conditions: AY-X127E Indoor side Outdoor side Dry-bulb Temp. (˚C) Relative Humidity (%) Dry-bulb Temp. (˚C) Relative Humidity (%) Cooling Heating Temperature at each part and pressure in 3-way valve AY-X127E Operation Cool Heat Cool Heat mode (Max.)
Page 34: Performance Curves
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-X127E (Running frequency: 99Hz) (Running frequency: 102Hz) 1800 1800 1600 1600 1400...
Page 35: Disassembling Procedure
AY-X127E AE-X127E DISASSEMBLING PROCEDURE FOR INDOOR UNIT MODEL AH-X127E AND AY-X127E 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 36 AH-X127E AU-X127E AY-X127E AE-X127E 6. After closing the open panel, open the horizontal 9. Remove the control box cover. adjustment louver and pull out the bottom of the front Holding its bottom, pull and disengage the upper hook panel toward you.
Page 37 AH-X127E AU-X127E AY-X127E AE-X127E 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 38 AH-X127E AU-X127E AY-X127E AE-X127E 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 39 AH-X127E AU-X127E AY-X127E AE-X127E <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 4 poles terminal metal, take care to prevent injuring the inner surface board.
Page 40 AH-X127E AU-X127E AY-X127E AE-X127E Drain pan and related 4. Remove the terminal board fastening screw of the terminal How to remove the louver motor. board holder. Remove two screws which fasten the louver motor. 5. Remove the thermostat holder from the control box.
Page 41 AH-X127E AU-X127E AY-X127E AE-X127E SERVICING PROCEDURE FOR OUTDOOR UNIT MODEL AU-X127E AND AE-X127E 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 42 AH-X127E AU-X127E AY-X127E AE-X127E 7. Remove five screws which are fixing right side of the rear 10. Remove three screws which are fixing condenser box cabinet. cover. 8. Remove one screw which is fixing left side of the rear 11. Remove two screws which are fixing the control box.
Page 43 AH-X127E AU-X127E AY-X127E AE-X127E 13. Cut the band. 16. Remove two screws which are fixing heat insulator assembly. And take it out. 14. Disconnect five wires from the control box to the reactor 17. Remove two screws which are fixing bulkhead. And take and capacitors.
Page 44 AH-X127E AU-X127E AY-X127E AE-X127E 19. Take out the compressor cover. 23. Remove one screw which is fixing the reactor cover. And take it out. 20. Take out the thermistor from the tube. 24. Remove two screws which are fixing the reactor. And take it out.
Page 45 AH-X127E AU-X127E AY-X127E AE-X127E Applicable air-conditioner models AH-X127 series Type AY-X127 series AZ-F1207 Precautions » The filters are sealed in a plastic bag to keep Air Purifying Filter thier dust collection effect. Do not open the bag until using the filters. (Otherwise the filters’...
Page 46 AH-X127E AU-X127E AY-X127E AE-X127E Applicable air-conditioner models AH-X127 series Type AY-X127 series AZ-F1257 Precautions » The filters are sealed in a plastic bag to keep Air Purifying Filter thier dust collection effect. Do not open the bag until using the filters. (Otherwise the filters’...

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Sharp AH-X127E Service Manual

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