Sharp AE-X3M18JR Service Manual
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Sharp AE-X3M18JR Service Manual

Muliti split type room air conditioners
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CHAPTER 1. SPECIFICATIONS
[1]
SPECIFICATION.................................... . ....... 1-1
[2]
EXTERNAL DIMENSION....................... . ....... 1-2
[3]
CAPACITY TABLE ................................. . ....... 1-3
[4]
ELECTRICAL PARTS ............................ . ....... 1-3
[5]
WIRING DIAGRAMS.............................. . ....... 1-4
CHAPTER 2. EXPLANATION OF CIRCUIT AND OP-
ERATION
[1]
BLOCK DIAGARM ................................. . ....... 2-1
[2]
FUNCTIONS .......................................... . ....... 2-2
[3]
ACTIVE FILTER CIRCUIT ..................... . ....... 2-4
[4]
[1]
TIONS .................................................... . ....... 3-1
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

MULITI SPLIT TYPE
ROOM AIR CONDITIONERS
MODEL
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
[2]
TROUBLESHOOTING GUIDE ......................3-2
[1]
REFRIGERATION SYCLE.............................4-1
[2]
WORKS .........................................................4-2
[1]
OUTDOOR UNIT...........................................5-1
S1804AEX3M18J
(OUTDOOR UNIT)
AE-X3M18JR
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
AE3XM18JR

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Summary of Contents for Sharp AE-X3M18JR

  • Page 1: Table Of Contents

    S1804AEX3M18J MULITI SPLIT TYPE ROOM AIR CONDITIONERS (OUTDOOR UNIT) AE-X3M18JR MODEL 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: Specification

    AEX3M18JR CHAPTER 1. AEX3M18JR SPECIFICATIONS [1] SPECIFICATION ITEMS INDOOR UNIT OUTDOOR UNIT AY-XPM7FR/9FR/12FR AE-X3M18JR Cooling capacity 3-INDOOR OPERATION 7K & 7K & 7K 5.2 (2.2 – 7.2)* Heating capacity 3-INDOOR OPERATION 7K & 7K & 7K 6.8 (2.2 – 8.4)*...

  • Page 3: External Dimension

    AEX3M18JR [2] EXTERNAL DIMENSION 1 – 2...

  • Page 4: Capacity Table

    AEX3M18JR [3] CAPACITY TABLE Recommended Combination Outdoor Units Indoor Units AY-XPM7/9/12FR, GS-XPM9/12, GS-XPM7/9/12FR AE-X3M18JR COOLING CAPACITY TABLE Operating Combination of Indoor Cooling Capacity (kW) Running Current (A) Power Consumption (W) Status Units RATING (Min. - Max.) RATING (Min. - Max.) RATING (Min.

  • Page 5: Wiring Diagrams

    AEX3M18JR [5] WIRING DIAGRAMS from ELECTROLYTIC CAPACITOR C10(+) from CONTROL PWB CN14 from ELECTROLYTIC CAPACITOR C10(-) from COMPRESSOR TERMINAL W "ORANGE" from COMPRESSOR TERMINAL from COMPRESSOR TERMINAL U "RED" V "WHITE" from CONTROL PWB BCN1 IPM P.W.B. 1 – 4...
  • Page 6 AEX3M18JR RELAY P.W.B and POWER SUPPLY P.W.B. 1 – 5...
  • Page 7 AEX3M18JR CONTROL P.W.B and DISPLAY P.W.B 1 – 6...
  • Page 8 AEX3M18JR 1 – 7...

  • Page 9: Block Diagarm

    AEX3M18JR CHAPTER 2. AEX3M18JR EXPLANATION OF CIRCUIT AND OPERATION [1] BLOCK DIAGARM 20 A Fuse Fuse Power supply circuit Smoothing circuit Active filter circuit Filter circuit AC power CPU oscillator circuit DC power supply circuit DC over voltage detection circuit Expansion valve A drive circuit Expansion valve A Expansion valve B drive circuit...

  • Page 10: Functions

    AEX3M18JR [2] FUNCTIONS 1. FREQUENCY CONTROL 2. OVER CURRENT PROTECTION 1) AC current peak control DC over current detection, AC over current detection. To protect against over current due to sudden change in load, the compressor is Cooling mode Heating mode stopped if 24A DC is exceeded in the DC section.
  • Page 11 AEX3M18JR 9. PUMP DOWN SWITCH When the PUMP DOWN SWITCH (SW1) is pressed for 5 seconds or More than More than More than more, the total A/C system will start its TEST RUN automatically and 20 min. 20 min. 20 min. the compressor frequency will be 48.3 Hz.

  • Page 12: Active Filter Circuit

    AEX3M18JR [3] ACTIVE FILTER CIRCUIT This circuit uses Active Filter Module and IPM as the figure below for the high efficiency operation of compressor. Active Filter Choke coil Rectification circuit Noise filter Compressor circuit Positional detection Voltage raise signal Sine wave current ON/OFF Compressor Control...
  • Page 13 AEX3M18JR Control Control IGBT IGBT PFC control PFC control BCN13 BCN13 Active Filter Circuit Active Filter Circuit 3. Active Filter Driving Electronics Circuit At the operation of compressor, the microcomputer (IC1), as the 50th pin gets “H”, will turn the transistor Q4 ON through the transistor Q3. By this, 18V is supplied to the 3rd pin of connector BCN13 of the Active Filter and the Active Filter will be turned ON.

  • Page 14: Explanation Of Ipm Drive Circuit

    AEX3M18JR [4] EXPLANATION OF IPM DRIVE CIRCUIT The power supply for the IPM drive, and the shunt resistor for over current detection, etc., are provided out of the IPM (in control PWB). 1. IPM drive power supply circuit The power supply for driving the upper-phase IGBT (HU, HV, HW) drive employs a Bootstrap system. The 15-V power supply for the lower-phase IC is provided by the control printed circuit board (PWB).
  • Page 15 AEX3M18JR 3. 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, and a position detection signal is generated as a reference voltage which is equal to 1/2 of 370 VDC.

  • Page 16: Chapter 3. Function And Operation Of Pro- Tective Procedures Protective Functions And Opera- Tions

    CHAPTER 3. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES [1] PROTECTIVE FUNCTIONS AND OPERATIONS Function Operation Description Detection time Restart condition Restart time door door Compressor is stopped if a current approxi- Automatically restarts During compres- DC over current mately 24A or more flows in the power tran- after safety time (180 4 times sor operation...

  • Page 17: Troubleshooting Guide

    Function Operation Description Detection time Restart condition Restart time door door When power source frequency cannot be Power factor mod- At compressor Compressor continues determined (at startup) or when power ule (Active Filter) start up, when in operation without stop- None source clock can not be detected for 1 con- clock error...
  • Page 18 3 – 3...
  • Page 19 3 – 4...
  • Page 20 CHECK METHOD CAUTION: CHECKING PRINTED CIRCUIT BOARDS (PWB) Non-insulated control circuit The GND terminals of the low-voltage circuits (control circuits for Do not touch the cabinet or bring metal microcomputer and thermistors and drive circuits for expansion valve parts into contact with and relays) on the control printed circuit board (PWB) are connected the cabinet.
  • Page 21 To measure the resistance, first remove the connector from the board. Thermistor Connector Color Connector pin Compressor thermistor CN8A No. 1 to 2 Heat exchanger pipe thermistor CN8A Orange No. 3 to 4 Outdoor temp. thermistor CN8A Green No. 5 to 6 Suction thermistor CN8A Black...
  • Page 22 3 – 7...
  • Page 23 2. When one room is not cooled (other rooms are cooled) Is the timer lamp of the indoor unit in the room not cooled flashing ? Press the OPERATION button to start operating the air-conditioner. (Set the cooling mode to 18ºC.) Check the failure symptom with the failure Is the timer lamp of the...

  • Page 24: Chapter 4. Refrigeration Cycle

    AEX3M18JR CHAPTER 4. AEX3M18JR REFRIGERATION CYCLE [1] REFRIGERATION SYCLE UNIT C STOP valve (Liquid) Expansion valve C Heat exchanger UNIT B Expansion valve B Heat exchanger UNIT A Expansion valve A Heat exchanger STOP valve (Gas) OUTDOOR UNIT INDOOR UNIT Refrigeration Cycle UNIT C UNIT B...

  • Page 25: Refrigerant Pipe Installation Works

    1200 1400 1000 1200 1000 Outside air temp. (ºC) At Heating for AY-XPM7FR (for AE-X3M18JR) Outside air temp. (ºC) At Cooling for AY-XPM7FR (for AE-X3M18JR) [2] REFRIGERANT PIPE INSTALLATION WORKS 1. Piping 2. Air-removing Use an adapter for preventing vacuum pump oil from flowing back to INDOOR UNIT Max.

  • Page 26: Pump Down

    AEX3M18JR 8) Fully open the stop valve (gas side) with hexagon socket screw CAUTION: Execute the pump down operation using with PUMP key. Turn all the way up to contact. DOWN SWITCH. The compressor might stop on the way if pump down is operated while cooling operation mode with- 9) Disconnect the gauge manifold hose from the service port.

  • Page 27: Chapter 5. Disassembling Procedure

    AEX3M18JR CHAPTER 5. AEX3M18JR DISASSEMBLING PROCEDURE [1] OUTDOOR UNIT CAUTION: DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE ANY SERVICING. 1. PROCEDURE 4. Remove the 4 screws fixing the fan guard then remove it and remove the 7 screws fixing the cabinet then remove it. 1.
  • Page 28 AEX3M18JR 7. Disconnect the 9 connectors. 10.Unfasten the nut fixing the propeller fan then remove it. Expansion valve (CN12A, CN12B, CN12C): 3pcs. Remove the 5 screws fixing the control box then remove it. Thermistor (CN8A, CN8B, CN8C): 3pcs. 1 screw is at the right. Fan motor (CN3): 1pc.
  • Page 29 AEX3M18JR 13.Remove the 3 screws fixing the coil for PFC then remove it How to disassemble the control box assembly NOTE: When the coil re-install, silicone grease must be paste to the 16.Cut the 3 wire fixing bands. back face of the coil. Disconnect the 7 connectors.
  • Page 30 AEX3M18JR 18.Disconnect the 5 terminals (T1, 2, 4, 6, MRY1) and 3 connectors 21.Remove the 2 screws fixing the heat sink cover then remove it. (CN14, CN2, CN13 (Active Filter)). 22.Cut a wire fixing board. 19.Remove the 3 screws fixing the power supply board unit (PWB). 23.Remove the each of 4 screws fixing the heat sink.
  • Page 31 AEX3M18JR Active filter Power transistor module(IPM) 25.Disconnect the 6 terminals (P, Io, +, -, L1, L2) and 1 connector (CN13) on the active filter. And Remove the 2 screws fixing the power module and remove it. CAUTION: Fix the connector of the power module securely. NOTE: When the active filter re-install, silicone grease must be paste to the back face of the Active Filter.
  • Page 32 AEX3M18JR MEMO 5 – 6...

  • Page 33: Outdoor Unit

    AEX3M18JR PartsGuide PARTS LIST MULITI SPLIT TYPE ROOM AIR CONDITIONERS (OUTDOOR UNIT) AE-3XM18JR MODEL CONTENTS OUTDOOR UNIT PACKING PARTS CONTROL BOARD UNIT PARTS INDEX IPM30A BOARD PARTS HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information.
  • Page 34 AEX3M18JR [1] OUTDOOR UNIT 2-21 2-20 1-30 2-14 6-11 2-17 2-11 2-23 1-36 2-99 2-16 2-15 6-12 1-18 1-51 2-85 2-65 2-13 2-10 2-84 2-83 2-12 2-46 6-11 2-18 2-93 6-13 2-62 2-22 1-34 2-63 2-27 1-44 2-26 2-19 6-10 1-43 2-98 1-37...
  • Page 35 AEX3M18JR PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] OUTDOOR UNIT CABINET AND UNIT PARTS Base pan assembly CCHS-A789JBTB Fan motor CMOTLB051JBEZ Rear cabinet assembly DCAB-A126JBTB Coil cover assembly FCOV-A330JBWZ Cabinet GCAB-A366JBTA Control box cover GFTA-A455JBTB Fan guard GGADFA042JBFA Side cover R GPLTMA059JBTB LANGKA236JBPZ...
  • Page 36 AEX3M18JR PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] OUTDOOR UNIT 2-12 Insulator PSEL-C376JBEZ 2-13 Haet sink PRDAFA215JBEZ 2-14 Heat sink PRDAFA216JBEZ 2-15 Insulator PSEL-C037JBEZ 2-16 Insulator PSEL-C074JBEZ 2-17 PSEL-C374JBEZ Seal 2-18 Angle sheet PSHE-A195JBEZ 2-19 Cord holder sheet PSHE-A196JBEZ 2-20 Spacer...
  • Page 37 AEX3M18JR PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [2] CONTROL BOARD UNIT PARTS Control board unit DSGY-C346JBKZ 2-2-1 Fuse (FUSE1,101) QFS-GA065JBZZ 2-2-2 Fuse (FUSE3, 4) QFS-GA062JBZZ 2-2-3 Fuse (FUSE5) QFS-GA063JBZZ 2-2-4 Fuse (FUSE6) QFS-GA064JBZZ RTRN-A256JBE0 Transformer (CT1) D1 D38 Diode (D1,38) VHD1SS133//-1 Diode (D14)
  • Page 38 AEX3M18JR INDEX PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK PGUM-A115JBEZ 1-1-21 [ C ] PGUM-A119JBEZ 1-1-22 CCHS-A789JBTB 1-1-1 PGUM-A120JBEZ 1-1-23 CCIL-A133JBEZ 1-3-1 PGUM-A121JBEZ 1-1-24 CFTA-A282JBKZ 1-1-71 PGUM-A141JBEZ 1-1-72 CMOTLB051JBEZ 1-1-2 PGUMSA068JBE0 1-1-26 CPADBA131JBKZ 4-5-2 PGUMSA319JBEZ 1-1-27...
  • Page 39 AEX3M18JR PRICE PART PARTS CODE RANK MARK RANK RIC--A025BDE0 2-IC3 IC12 RMOTSA031JBZZ 1-3-20 RRLYDA008JBZZ 2-RY1 RRLYDA012JBZZ 2-MRY1 RR-WZA028JBE0 3-R100 RTHM-A022JBE0 1-2-80 RTRN-A256JBE0 2-CT1 RTRN-A294JBZZ 1-1-55 RTRNWA034JBZZ 2-TR1 [ S ] SPAKCC415JBEZ 4-5-1 [ T ] TINS-B119JBRZ 1-4-3 TINS-B120JBRZ 1-4-4 TINS-B121JBRZ 1-4-6 TLAB-B709JBRA 1-1-57...
  • Page 40 EndPage COPYRIGHT © 2008 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in anyform or by any means, electronic, mechanical, photocopying, re- cording, or other wise, without prior written permission of the publisher.

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