Sharp AE-X26FR-N Service Manual
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Sharp AE-X26FR-N Service Manual

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CHAPTER 1. SPECIFICATION
[1]
SPECIFICATION.................................... . ....... 1-1
[2]
EXTERNAL DIMENSION....................... . ....... 1-2
[3]
WIRING DIAGRAM ................................ . ....... 1-3
[4]
ELECTRICAL PARTS ............................ . ....... 1-3
ERATION
[1]
BLOCK DIAGRAMS............................... . ....... 2-1
[2]
[3]
FUNCTION............................................. . ....... 2-8
[1]
OPERATIONS........................................ . ....... 3-1
[2]
THERMISTOR ERROR ......................... . ....... 3-3
[3]
ACTERISTICS ....................................... . ....... 3-5
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.
SERVICE MANUAL
SPLIT TYPE
ROOM AIR CONDITIONER
MODELS
CONTENTS
INDOOR UNIT
AY-XP26FR-N
OUTDOOR UNIT
AE-X26FR-N
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.
[4]
UNIT INDEPENDENTLY ...............................3-6
[5]
[6]
OD .................................................................3-8
[7]
[8]
TROUBLESHOOTING GUIDE ....................3-13
[1]
FLOW FOR REFRIGERANT .........................4-1
[2]
STANDARD CONDITIONS............................4-1
[3]
PERFORMANCE CURVES...........................4-2
[1]
INDOOR UNIT...............................................5-1
[2]
OUTDOOR UNIT...........................................5-5
REOLACEMENT PARTS LIST
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
AYXP26FRN
........3-6

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  • Page 1: Table Of Contents

    ROOM AIR CONDITIONER INDOOR UNIT MODELS AY-XP26FR-N OUTDOOR UNIT AE-X26FR-N 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. CONTENTS CHAPTER 1.

  • Page 2: Specification

    AYXP26FRN CHAPTER 1. AYXP26FRN SPECIFICATION Service Manual [1] SPECIFICATION 1. AY-XP26FR-N / AE-X26FR-N MODEL INDOOR UNIT OUTDOOR UNIT ITEMS AY-XP26FR-N AE-X26FR-N Cooling capacity(Min. ~ Max.) 2.6 (0.9 - 3.0) Heating capacity(Min. ~ Max.) 3.6 (0.9 - 5.0) Moisture removal(at cooling)

  • Page 3: External Dimension

    AYXP26FRN [2] EXTERNAL DIMENSION 1. INDOOR UNIT 18.5 INVERTER AIR CONDITIONER CRMC-A442JBE0 R03(AAA) 2PCS. SHARP CORPORATION 22.0 2. OUTDOOR UNIT 37.5 167.5 1 – 2...

  • Page 4: Wiring Diagram

    AYXP26FRN [3] WIRING DIAGRAM 1. INDOOR UNIT WIRING DIAGRAM LED INDICATION FOR SELF-DIAGNOSIS <CB878> OUTDOOR UNIT INDOOR UNIT Temperature TERMINAL BOARD1 TERMINAL BOARD 2 TERMINAL BOARD GREEN-YELLOW Indicator Abnormal contents Blinking No. POWER SUPPLY BLACK BLUE Short circuit of the Thermistor SINGLE CONTROL BOARD UNIT Overheat error (compressor and cycle)

  • Page 5: Chapter 2. Explamation Of Circuit And Op

    AYXP26FRN CHAPTER 2. AYXP26FRN EXPLAMATION OF CIRCUIT AND OPERATION Service Manual [1] BLOCK DIAGRAMS 1. Indoor unit DC power supply circuit Rectification circuit AC power 3.15A Fuse Fuse Fan motor PWM control circuit Indoor fan motor Rotation pulse input circuit Fan motor pulse detect AC clock circuit Remote controller signal reception circuit...
  • Page 6 AYXP26FRN 2. Outdoor unit protection Unit-unit wiring (AC power Power supply circuit Smoothing Power factor Filter circuit converter circuit circuit and serial signals) CPU oscillator circuit 3.15A DC overvoltage detection circuit protection Outdoor fan Outdoor fan drive circuit 4-way valve relay drive circuit 4-way valve protection Power transistor module drive circuit...

  • Page 7: Microcomputer Control System

    AYXP26FRN [2] MICROCOMPUTER CONTROL SYSTEM 1. Indoor unit 1.1. Electronic control circuit diagram 2 – 3...
  • Page 8 AYXP26FRN 1.2. Display circuit diagram 2 – 4...
  • Page 9 AYXP26FRN 1.3. Printed wiring board 2 – 5...
  • Page 10 AYXP26FRN 2. Outdoor unit 2.1. Electronic control circuit diagram 2 – 6...
  • Page 11 AYXP26FRN 2.2. Printed wiring board 2 – 7...

  • Page 12: Function

    AYXP26FRN [3] FUNCTION 1. Functions 1.1. Startup control 1.7. Indoor unit overheat prevention control The main relay remains off during the first 45 seconds (first safety During heating operation, if the temperature of the indoor unit heat time) immediately after the power cord is plugged into an AC outlet in exchanger exceeds the indoor unit heat exchanger overheat preven- order to disable outdoor unit operation and protect outdoor unit electric tion temperature (about 45 to 54°C) which is determined by the operat-...
  • Page 13 AYXP26FRN 1.11. Peak control 1.16. Power ON start If the current flowing in the air conditioner exceeds the peak control If a jumper cable is inserted in the location marked with HAJP on the current (see the table below), the operation frequency is decreased indoor unit control printed circuit board (control PCB), connecting the until the current value drops below the peak control current regardless power cord to an AC outlet starts the air conditioner in either cooling or...
  • Page 14 AYXP26FRN 1.19. Airflow control 2) With the remote control pointed away from the main unit to disallow signals from reaching the main unit, press the Stop button. The airflow control holds the two upper and lower louvers at special 3) When the Airflow Up/Down button is held down for more than 5 positions during operation to prevent discharged air from directly blow- ing onto people in the room.
  • Page 15 AYXP26FRN 1.22. Dehumidifying operation control 2) If the room temperature remains in the hot keep zone, the com- pressor is turned OFF and ON in 3-minute intervals. If the room temperature is 26°C or higher when dehumidifying opera- 3) The indoor unit fan turns OFF and ON with a delay of 30 seconds tion starts, the dehumidifying operation provides a low cooling effect in from the compressor OFF/ON.
  • Page 16 AYXP26FRN 2. Explanation of cluster circuit The cluster unit generates cluster ions, which are circulated throughout the room by the air flow created by the blower fan (indoor unit fan motor) in the air conditioner unit. 1) When microcomputer output 1 turns "H," the IC6-1 output changes to "Lo," turning ON the SSR and applying 230 V to the cluster unit for the gen- eration of cluster ions (positive and negative ions).
  • Page 17 AYXP26FRN As such, by varying the ON/OFF duty of the IGBT, the output voltage is varied. Reactor Stored energy IGBT ON IGBT OFF IGBT 3.2. High power factor control circuit This circuit brings the operating current waveform closer to the waveform of commercial power supply voltage to maintain a high power factor. Because of the capacitor input, when the PAM circuit is OFF, the phase of the current waveform deviates from the voltage waveform as shown below.
  • Page 18 AYXP26FRN 3.2.3 IGBT ON start time (delay time B) • Based on the zero-cross of the AC voltage, the IGBT turns ON after a delay time set according to the power source frequency. 3.2.4 IGBT ON time (C) • After the above delay time, the IGBT turns ON to supply a current to the reactor. •...
  • Page 19 AYXP26FRN In addition to conventional error-generating reasons, there is a possibility that the PAM IGBT does not turn ON even if the compressor is operating. In that case, the DC voltage does not rise even though the compressor is operating, and lowers to the 180-VDC level. –...
  • Page 20 AYXP26FRN 4.1.2 DC overcurrent detection circuit When a current of about 25 A or higher flows through the shunt resistance (R49) on the control printed circuit board (PCB), the voltage at this resis- tance is input to IPM CIN pin (16). Then, the gate voltage of the lower-phase IGBT (LU, LV, LW) inside the IPM turns OFF to cut off the overcurrent. At the same time, an L output of about 1.8 ms is generated from IPM Fo pin (18), and this results in an L input to overcurrent detection input pin (15) of the microcomputer (IC1) and turns OFF the PWM signal output (IC1 pins (9) through (14)) to the IGBT gate.
  • Page 21 AYXP26FRN 5. Compressor digital position detection 5.1. 120° energizing control (digital position detection control) This control system detects the digital position detection signal and adjusts the rate of acceleration/deceleration accordingly. The motor's induced voltage waveform is input to the comparator in the form of PWM-switched pulse waveform, and a position detection signal is generated as a reference voltage equaling 1/2 of 320 VDC.

  • Page 22: Chapter 3. Function And Operation Of Pro- Tective Procedures Protection Device Functions And Operations

    AYXP26FRN CHAPTER 3. AYXP26FRN FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES Service Manual [1] PROTECTION DEVICE FUNCTIONS AND OPERATIONS Function Operation Self-diagnosis result display Description Detection period Reset condition Indoor Indoor Outdoor unit unit unit error display Operation OFF or ON ✩2 Indoor unit fan lock Operation stops if there is no When indoor unit fan...
  • Page 23 AYXP26FRN Function Operation Self-diagnosis result display Description Detection period Reset condition Indoor Indoor Outdoor unit unit unit error display Operation OFF or ON Yes ✩1 AC overcurrent Operating frequency lowers if When compressor is error compressor AC current exceeds in operation peak control current value.

  • Page 24: Air Conditioner Operation In Thermistor Error

    AYXP26FRN Function Operation Self-diagnosis result display Description Detection period Reset condition Indoor Indoor Outdoor unit unit unit error display Operation OFF or ON Yes ✩3 25 Compressor star- Compressor stops if compressor At compressor star- tup error fails to start up. Operation OFF or ON Yes ✩3 26 Compressor rota- Compressor stops if there is no...
  • Page 25 AYXP26FRN 2. Outdoor unit Item Mode Control opera- When resis- Short-circuit When resis- Open-circuit tion tance is low tance is high (temperature (temperature judged higher judged lower than actual) than actual) Compressor Cooling Expansion valve Compressor Compressor high Layer short-cir- Outdoor unit ther- chamber ther- Dehumidifying...

  • Page 26: Thermistor Temperature Characteristics

    AYXP26FRN [3] THERMISTOR TEMPERATURE CHARACTERISTICS 1. Indoor unit thermistor temperature characteristics Resistance (K ) Tester Tester Heat exchanger thermistor TH2 (orange) Resistance at 25 : 15 k Room temperature thermistor TH1 (yellow) Resistance at 25 : 10 k Temperature( TH1 Room temperature thermistor TH2 Heat exchanger thermistor Thermistor Symbol...

  • Page 27: How To Operate The Outdoor Unit Independently

    AYXP26FRN [4] HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY 1. Cooling in 40 Hz fixed mode To operate the outdoor unit independently, short-circuit the sections indicated by arrows in the diagram below with an adapter, and apply 230 VAC between (1) and (N) on the terminal board of the outdoor unit. This allows the outdoor unit to be operated in cooling mode independently. (Do not operate the outdoor unit in this condition for an extended period of time.) Short-circuit negative terminal of (L2)
  • Page 28 AYXP26FRN Main cause Inspection method Normal value/condition Remedy Open-circuit or short-circuit in wir- Check if wires of light receiving Wires of light receiving section Replace wires of light receiving ing of light receiving section. section are caught. should not have any damage section.

  • Page 29: Malfunction (Parts) Check Meth

    AYXP26FRN [6] MALFUNCTION (PARTS) CHECK METHOD 1. Procedure for determining defective outdoor unit IPM/compressor The following flow chart shows a procedure for locating the cause of a malfunction when the compressor does not start up and a DC overcurrent indi- cation error occurs.
  • Page 30 AYXP26FRN 2. Procedure for determining defective expansion valve Measure resistance in expansion valve coil. Normal resistance between red terminal of expansion valve lead wire and each terminal: about 46 (at 20 (red) Checker Insert checker shown at left into connector (CN12) on control PWB, and operate air conditioner.

  • Page 31: Outdoor Unit Check Method

    AYXP26FRN 5. IPM check method Turn off the power, let the large capacity electrolytic capacitor (C10) discharge completely, and dismount the IPM. Then, using a tester, check leak current between C and E. When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed. Needle-type tester Normal resistance value Needle-type tester...
  • Page 32 AYXP26FRN Item Check method Normal value/condition Remedy Compressor check Measure compressor coil resistance Resistance value at 20°C --- 0.65Ω Correct connections at compres- (for each phase of U, V and W). sor terminals. Use multi-meter or digital tester capa- Replace compressor. ble of displaying two digits right of the decimal point (0.01Ω).
  • Page 33 AYXP26FRN 3. Caution in checking printed circuit boards (PWB) 3.1. Non-insulated control circuit The GND terminals of the low-voltage circuits (control circuits for microcomputer and thermistors and drive circuits for expansion valve and relays) on the control printed circuit board (PWB) are connected to the compressor drive power supply (320-VDC negative terminal). Therefore, exercise utmost caution to prevent electric shock.

  • Page 34: Troubleshooting Guide

    AYXP26FRN [8] TROUBLESHOOTING GUIDE 1. Self-Diagnosis Function and Display Mode To call out the content of the self-diagnosis memory, hold down the emergency operation button for more than 5 seconds when the indoor unit is not operating. • The number of indications displayed by the LEDs on the outdoor unit differs from that for the 2001 cooling unit models (for detailed display of mal- function information).
  • Page 35 AYXP26FRN Status of Indication Malfunction Content of diagnosis Inspection location/method Remedy indoor/ by LED1 on No. dis- outdoor outdoor played on units unit *2 main unit display sec- tion *1 Main Sub- Main category Sub-category cate- cate- gory gory Indoor/ 2 times Cycle tempera- Compressor high-...
  • Page 36 AYXP26FRN Status of Indication Malfunction Content of diagnosis Inspection location/method Remedy indoor/ by LED1 on No. dis- outdoor outdoor played on units unit *2 main unit display sec- tion *1 Main Sub- Main category Sub-category cate- cate- gory gory Indoor/ 6 times Outdoor unit DC overcurrent error (1)
  • Page 37 AYXP26FRN Status of Indication Malfunction Content of diagnosis Inspection location/method Remedy indoor/ by LED1 on No. dis- outdoor outdoor played on units unit *2 main unit display sec- tion *1 Main Sub- Main category Sub-category cate- cate- gory gory Indoor/ Outdoor unit DC Outdoor unit DC fan Check connector CN3 of...
  • Page 38 AYXP26FRN Status of Indication Malfunction Content of diagnosis Inspection location/method Remedy indoor/ by LED1 on No. dis- outdoor outdoor played on units unit *2 main unit display sec- tion *1 Main Sub- Main category Sub-category cate- cate- gory gory Indoor Wires between Serial open-circuit Check the wires between...
  • Page 39 AYXP26FRN Malfunction indications due to erroneous wiring during air conditioner installation Inter-unit wiring error mode Symptom Indoor unit relay Turns On momentarily, then turns Off. Malfunction diagnosis display "18-1" Indoor Outdoor unit unit Indoor unit relay Relays turns Off after about 30 minutes. Malfunction diagnosis display None (Displays "18-0"...

  • Page 40: Chapter 4. Refrigeration Cycle

    AYXP26FRN CHAPTER 4. AYXP26FRN REFRIGERATION CYCLE Service Manual [1] FLOW FOR REFRIGERANT Indoor unit Evaporator Flare coupling Flare coupling 3-way 2-way valve valve Heating Cooling Silencer Strainer Outdoor unit Accumulator Expansion Capillary valve tube B Comp- ressor Coil Condenser Reverse valve [2] STANDARD CONDITIONS Indoor side Outdoor side...

  • Page 41: Performance Curves

    AYXP26FRN [3] PERFORMANCE CURVES NOTE: 1) Indoor fan speed: Hi 2) Vertical adjustment louver "45°, Horizontal adjustment louver "front" 3) Indoor air temp. : Cooling 27°C, Heating 20°C 4) Power source : 230V, 50Hz 1. AY-XP26FR-N 1.1. At Cooling 1.2. At Heating Outside air temp.(°C) Outside air temp.(°C) 4 –...

  • Page 42: Chapter 5. Disassembling Procedure

    AYXP26FRN CHAPTER 5. AYXP26FRN DISASSEMBLING PROCEDURE Service Manual Be sure to disconnect the power cord from the AC power outlet before starting the disassembly procedure. When reassembling the unit after repair- ing, be sure to install screws to their original positions. The screws used are not the same in specifications such as corrosion-resistant treatment, tip shape and length.
  • Page 43 AYXP26FRN 7) Remove the air filters. 11)Remove the control box cover retaining screw (1), and remove the control box. 8) Remove the front panel retaining screws (3). 12)Remove the light receiving unit retaining screw (1). 9) Disengage the hook on the back side (indicated with "O" in the dia- gram below), and dismount the front panel.
  • Page 44 AYXP26FRN 15)Remove the Display PWB. 20)Remove the dew cover. 16)Remove the control box retaining screw. 21)Remove the side panel L and drain pan retaining screws (3). 17)Disconnect the connectors ([fan motor / cluster / louver motor] x 2, 22)Remove the screw cover of the drain pan. rimit switch).
  • Page 45 AYXP26FRN 25)Remove the cluster holder. 29)Remove the heat exchanger retaining screws (2). 26)Dismount the cluster (2 tabs). 30)Disengage the heat exchanger. 31)Remove the motor cover retaining screws (3). 27)Dismount the drain pan. 28)Then, disengage the left side. 32)Disengage the horizontal louver cover (hinge). Move the cover to the position shown in the diagram, then pull it to detach.

  • Page 46: Outdoor Unit

    AYXP26FRN [2] OUTDOOR UNIT 5) The screw on the right-hand side of front panel is removed 1) The fixed screw of control box cover is removed and control box cover is removed. 6) The screw on the right-hand side of front panel is removed 2) The 2 screws on the right-hand side of top plate ass'y is removed.
  • Page 47 AYXP26FRN 9) The 2 screws on the right-hand side of side cover L is removed. 13)A bulkhead plate fixed 2 screws is removed. 10)The 5 screws of the side cover L and side cover R back is removed. 14)The conp cover top is removed. 11)The connectors in the control box BOX and eractor is removed.
  • Page 48 AYXP26FRN 16)A lead wire, a thermistor, and a cover gasket are removed. 19)An outdoor fan is removed. 20)The fixed 2 screws of a motor angle is removed. 17)A comp cover is removed. 18)A thermistor is removed. (1 place) 5 – 7...
  • Page 49 AYXP26FRN – Disassembly of Heater(CHET-A025JBKZ) Unit 1) Cut the band fixing the bi-metal thermostat. 2) Powercord for bi-metal thermostat. 3) Cut the band which holds together the thermistor cords and power cord for bi-metal thermostat. 4) Remove screw NK-8K 5) Purr out the heater wire from beneath the heat exchanger 5 –...
  • Page 50 AYXP26FRN — MEMO — 5 – 9...
  • Page 51 AYXP26FRN REPLACEMENT PARTS LIST SPLIT TYPE ROOM AIR CONDITIONER INDOOR UNIT MODELS AY-XP26FR-N OUTDOOR UNIT AE-X26FR-N CONTENTS INDOOR UNIT PARTS OUTDOOR UNIT PARTS PACKING PARTS (INDOOR UNIT) OTHER PARTS (OUTDOOR UNIT) OTHER PARTS (INDOOR UNIT) INDEX “HOW TO ORDER REPLACEMENT PARTS”...
  • Page 52 AYXP26FRN [1] INDOOR UNIT PARTS 4-7 4-8 2-29 2-25 2-10 4-10 2-23 2-8-2 2-8-3 2-26 1-11 2-8-1 2-16 2-19 2-20 2-20-17 2-20-8 2-18 2-20-2 2-20-10 2-20-11 2-17 2-20-3 2-13 2-20-11 2-12 2-20-12 2-27 2-20-10 2-20-14 2-24 2-20-13 2-20-5 2-20-1 2-20-16 2-11-2 2-14 2-20-9...
  • Page 53 AYXP26FRN PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] INDOOR UNIT PARTS CMOT-A433JBKZ Fan motor sub ass'y DSGY-B830JBKZ Control board unit QACC-A318JBZZ Power supply cord QTANZA001JBZZ Terminal board QTANZA018JBZZ Terminal board RH-HXA014JBZZ Thermister ass'y RTHM-A292JBE0 Thermistor QW-VZE403JBZZ Lead wire RMOT-A110JBZZ Louver motor 1-10...
  • Page 54 AYXP26FRN [2] PACKING PARTS (INDOOR UNIT) 90-2 90-1 90-3 PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [2] PACKING PARTS (INDOOR UNIT) 90-1 CPADBA059JBKZ Packing pad ass'y 90-2 SPADBA189JBEZ 90-3 SPAKCC046JBEZ Packing case [3] OTHER PARTS (INDOOR UNIT) 1-2-1 QFS-GA051JBZZ Fuse 1-2-2 QFS-GA052JBZZ...
  • Page 55 AYXP26FRN [4] OUTDOOR UNIT PARTS 2-17 2-34 2-26 2-7-1 2-7-2 2-31 2-37 2-33 2-25 2-20 1-2-6 2-19 1-2-7 3-12 2-18 1-10 2-10 2-39 2-21 2-38 2-13 2-14 2-11 1-11 2-12 2-35 2-36 2-27 3-16 3-18 3-21 3-17 3-20 3-19 2-28 3-22 2-32 3-15...
  • Page 56 AYXP26FRN PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] OUTDOOR UNIT PARTS CMOTLB078JBEZ Fan moter DSGY-B834JBKZ Control board unit 1-2-6 RH-IXA790JBZZ 1-2-7 VHDRBV2506+-F Diode bridge QW-VZF151JBZZ Lead wire RCILZA009JBZZ Reactor RTHM-A022JBE0 Thermistor QTANZA001JBZZ Terminal board FW-VZA056JBKZ Lead wire 1-10 RFIL-A064JBE0 Ferrite core 1-11...
  • Page 57 AYXP26FRN INDEX PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK [ C ] [ M ] CCAB-A409JBKZ 4-2-2 MHNG-A031JBFA 1-2-8-2 CCHS-A898JBKZ 4-3-1 MJNTPA095JBFA 1-2-20-10 CCIL-A129JBKZ 4-3-8 MLOV-A346JBFA 1-2-20-11 CCOV-A093JBKZ 1-2-8 MLOV-A347JBFA 1-2-20-12 CFIL-A088JBKZ 1-4-1 MLOV-A385JBFA 1-2-11-1 CFTA-A268JBKZ...
  • Page 58 AYXP26FRN PRICE PART PARTS CODE RANK MARK RANK RMOT-A110JBZZ 1-1-9 RTHM-A022JBE0 4-1-5 RTHM-A292JBE0 1-1-7 [ S ] SPADBA189JBEZ 2-90-2 SPAKCC045JBEZ 5-90-3 SPAKCC046JBEZ 2-90-3 SSAKHA149YDE0 3-4-6 [ T ] TINS-A983JBRZ 1-4-7 TINSEA449JBRZ 1-4-9 TLAB-C511JBRA 4-2-31 TLAB-C927JBEZ 1-4-8 TLABCB878JBRZ 1-2-22-2 TLABCC170JBRZ 4-2-3 TLABMA356JBRA 4-2-32 TSPC-F319JBRZ...
  • Page 59 MEMO...
  • Page 60 AYXP26FRN SHARP CORPORATION Appliance Systems Group Quality Assurance Department...

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