Samsung AQT24A5RE/B Service Manual
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Samsung AQT24A5RE/B Service Manual

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SERVICE
AIR CONDITIONER

ROOM AIR CONDITIONER

INDOOR
AQT24A(B)5(6)RE/B
AQT18A(B)9(0)RE/B
AQ18A(B)9(0)RE
SH24AT(B)5
SH18ZA(B)9
AQT24A(B)5(6)RED
AQ18A(B)9(0)RE(B)D
SH24TA(B)6D
SH18ZA(B)0D
AQT24C5(6)RE/B
AQT18C9(0)RE/B
AQ24A(B)5(6)RBD
AQT18C9(0)REF
Manual
1. Precautions
2. Product Specifications
3. Operating lnstructions and
Installation
4. Disassembly and Reassembly
5. Troubleshooting
6. Exploded Views and Parts List
7. Block Diagrams
8. PCB Diagrams
9. Wiring Diagrams
10. Schematic Diagrams
OUTDOOR
UQT24A(B)5(6)RE/B
UQT18A(B)9(0)RE/B
UQ18A(B)9(0)RE
SH24TA(B)5X
SH18ZA(B)9X
UQT24A(B)5(6)RED
UQ18A(B)9(0)RE(B)D
SH24TA(B)6DX
SH18ZA(B)0DX
UQT24C5(6)RE/B
UQT18C9(0)RE/B
UQ24A(B)5(6)RBD
UQT18C9(0)REF
CONTENTS

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Summary of Contents for Samsung AQT24A5RE/B

  • Page 1: Room Air Conditioner

    ROOM AIR CONDITIONER INDOOR OUTDOOR AQT24A(B)5(6)RE/B UQT24A(B)5(6)RE/B AQT18A(B)9(0)RE/B UQT18A(B)9(0)RE/B AQ18A(B)9(0)RE UQ18A(B)9(0)RE SH24AT(B)5 SH24TA(B)5X SH18ZA(B)9 SH18ZA(B)9X AQT24A(B)5(6)RED UQT24A(B)5(6)RED AQ18A(B)9(0)RE(B)D UQ18A(B)9(0)RE(B)D SH24TA(B)6D SH24TA(B)6DX SH18ZA(B)0D SH18ZA(B)0DX AQT24C5(6)RE/B UQT24C5(6)RE/B AQT18C9(0)RE/B UQT18C9(0)RE/B AQ24A(B)5(6)RBD UQ24A(B)5(6)RBD AQT18C9(0)REF UQT18C9(0)REF Manual SERVICE AIR CONDITIONER CONTENTS 1. Precautions 2. Product Specifications 3.

  • Page 2: Precautions

    Relocate the unit if necessary. 9. Keep children away from the unit while it is being repaired. Fig. 1-3 No Kids Nearby! 10. Be sure to clean the unit and its surround- ing area. Fig. 1-4 Clean the Unit Samsung Electronics...
  • Page 3 MEMO Samsung Electronics...

  • Page 4: Product Specifications

    Package dimensions Height Weight Width 1151 1023 1151 1023 Depth Weight Shipping Remarks : Rating Conditions are : Indoor air temperature ISO(50Hz) : 27˚C DB/19.0˚C WB, ISO(60Hz) : 27.0˚C DB/19.5˚C WB Outdoor air temperature ISO : 35.0˚C DB/24.0˚C WB Samsung Electronics...
  • Page 5 Airflow direction (indoor) Horizontal Manual Manual Manual Auto Auto Auto Vertical Comperssor Rotary(SAMSUNG) Reciprocating(Tecumseh) Rotary(SAMSUNG ) Refrigerant/Amount charged at rating R22 / 1,650g R22 / 1,500g R22 / 1,500g Features Capillary tube Capillary tube Capillary tube Refrigerant control Operation sound Indoor Hi/Mi/Lo...
  • Page 6 45 / 43 / 41 Flare type Flare type Flare type 6.35(1/4") 6.35(1/4") 6.35(1/4") 12.70(1/2") 12.70(1/2") 15.88(5/8") Optional / Hanger-plate Optional / Hanger-plate Optional / Hanger-plate Indoor unit Outdoor Indoor unit Outdoor Indoor unit Outdoor 1080 1080 1080 1511 1151 1151 1023 Samsung Electronics...
  • Page 7 & Package dimensions Height Weight Width 1151 1151 Depth Weight Shipping Remarks : Rating Conditions are : Indoor air temperature ISO(50Hz) : 27˚C DB/19.0˚C WB, ISO(60Hz) : 27.0˚C DB/19.5˚C WB Outdoor air temperature ISO : 35.0˚C DB/24.0˚C WB Samsung Electronics...

  • Page 8: Major Component Specifications

    ˚C Run capacitor µF x VAC 4µF x 450VAC 4µF x 450VAC Coil AL-FIN / Copper tube AL-FIN / Copper tube Rows x Steps 2 x 24 2 x 24 Heat Exch. Fin pitch Face area 0.5376 0.5376 Samsung Electronics...
  • Page 9 2.5µF x 450VAC 3.0µF x 450VAC Coil AL-FIN / Copper tube AL-FIN / Copper tube AL-FIN / Copper tube Rows x Steps 2 x 24 2 x 24 2 x 24 Heat Exch. Fin pitch Face area 0.5376 0.504 0.504 Samsung Electronics...
  • Page 10 17AM037A5 17AM037A5 135±5˚C 135±5˚C 135±5˚C 2.5µF x 450VAC 2.5µF x 450VAC 2.5µF x 450VAC AL-FIN / Copper tube AL-FIN / Copper tube AL-FIN / Copper tube 2 x 24 2 x 24 2 x 28 0.504 0.504 0.534 Samsung Electronics...
  • Page 11 ˚C Run capacitor µF x VAC 4µF x 450VAC 2.5µF x 450VAC Coil AL-FIN / Copper tube AL-FIN / Copper tube Rows x Steps 2 x 28 2 x 28 Heat Exch. Fin pitch Face area 0.543 0.504 Samsung Electronics...
  • Page 12 2-3 Dimensions 2-3-1 Indoor Unit (Remote control) (Front view) 1080 (Rear view) The feature is subject to be varied as a model. 2-3-2 Outdoor Unit 2-3-2(a) 24K BTU (Front view) (Rear view) Samsung Electronics...
  • Page 13 Product Specifications 2-3-3(b) 18K BTU (Front view) (Rear view) 2-10 Samsung Electronics...

  • Page 14: Pressure Graph

    2-4 Pressure Graph 24K BTU Outdoor inlet air D.B.temp.(˚C) 18 BTU Outdoor inlet air D.B.temp.(˚C) Samsung Electronics 2-11...
  • Page 15 MEMO 2-12 Samsung Electronics...

  • Page 16: Operating Instructions

    To select the 5 way function with the remote control, press the 5 way button one or more times until the desired mode is selected. Each time you press the 5 way button Each 5 way indicator on the indoor unit comes on in order. Samsung Electronics...
  • Page 17 De-ice end by sensing of the processing 7. FAN SPEED : Manual (3 step), Auto (4 step) time by de-ice Condition. Fan speed automatically varies depending on both the difference between setting and the room temperature. Samsung Electronics...
  • Page 18 "beep". 10. 24-Hour ON/OFF Real Setting Timer. : The air conditioner is turned ON at a specified time using Samsung Electronics...

  • Page 19: Installation

    It is harmful to the air conditioner if it is used in the following environments: greasy areas (including areas near machines), salty areas such as coast areas, areas where sulfuric gas is present such as hot spring areas. Contact your dealer for advice. Samsung Electronics...

  • Page 20: Disassembly And Reassembly

    7) Pull the upper left, right and Center of discharge softly for the outside cover to be pulled out. 8) Pull softly the lower part of discharge and push it up. Caution; Assemble the front panel and fix the hooks of left, right and Center. Samsung Electronics...
  • Page 21 4) Separate the bush body at the upper side and holder at the rearside. 5) Loosen the two fixing screws of left side. 6) Lifting the heat exchanger up a little to push the up side for separation from the indoor unit. Samsung Electronics...
  • Page 22 2) Loosen the fixing three screws and separate the motor holder. 3) Loosen the fixing screw of fan motor. (By use of M3 wrench) 4) Separate the fan motor from the fan. 5) Separate the fan from the left holder bearing. Samsung Electronics...

  • Page 23: Outdoor Unit

    Fan Motor 1) Do Procedure 1 above. & 2) Remove the nut flange. Propeller Fan (Turn to the right to remove as it is a left turned screw) 3) Disassemble the propeller fan. Samsung Electronics...

  • Page 24: Troubleshooting

    Indoor unit heat exchanger temperature sensor Error (open or short) Indoor fan malfunctioning (for speed is Below 450rpm) NATURE LED blinking (1Hz) STD, NATURE and TIMER LED blinking(1HZ) EEPROM Error AII LED blinking (1Hz) Option Error (Option wasn’t setup or option data error) Samsung Electronics...

  • Page 25: Fault Diagnosis By Symptom

    Check PCB pattern. Refer to Replace ICO2 10ms Replace nidule PCB. Is voltage output terminal of D101~D105(IN4007) normal? Are voltage at #18 and #19 of the micom normal? Replace resonator (X501) 100ms Replace IN4007 Is operation normal? Replace micom Samsung Electronics...
  • Page 26 Test rod location Normal voltage PCB CN73 Condition Fan operate = AC 180V Pin 3, Pin 5 MF-C is out of order Replace MFC Fan motor Fan motor should be replaced. is out of order. Samsung Electronics...
  • Page 27 Is the rating voltage ±10% range applied relay between out of order replaced. CN78 ! and # . Outdoor unit is out of order. Is the room sensor normal register? (25°C 10KΩ) 10°C 20°C 30°C 17.96k Ω 12.09kΩ 8.3kΩ Samsung Electronics...
  • Page 28 Is the voltage between CN71 #5 and CN78 #1 the rating voltage ±10% range? Abnormal RY73 Abnormal 4way valve of Outdoor Unit. or connecting Cable Refer to replace PCB module 4 way valve should be replaced or connecting Cable Check. Samsung Electronics...
  • Page 29 Voltage at PIN #30 of Remocon Micom change? Voltage at collecter of Q601 or Q602 change? Q601(C4375Y) or Q602(C1623Y) is faulty. IR LED(CL-1L5EU) is faulty. Voltage at pin #26 of micom (IC04) change (INDOOR UNIT)? Receiver module is faulty. Micom (IC04) is faulty. Samsung Electronics...

  • Page 30: Replace Pcb Module

    5-3 Replace PCB module 5-3-1 Replace PCB module Remove power cord Replace the PCB module Check the connection and plug in Replace another PCB module Does all display lamp blink or STD lamp blink? Refer to set up the Model option(5-3-2) Samsung Electronics...

  • Page 31: Set Up The Model Option

    $ When pressing the button appear on the display, select one of them. % When pressing the button appear on the display, select one of them. ^ When pressing the button appear on the display, select one of them. Samsung Electronics...
  • Page 32 If all lamps of indoor unit are flickering, Plug out and plug in again and pressing ON/OFF key to retry. If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the correct option code is set up for it’s model. Samsung Electronics...
  • Page 33 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 MODEL AQT24A(B)5RE SH24TA(B)5 AQT24A(B)6RE AQT24A(B)6RB AQT18A(B)9RE AQT18A(B)0RE AQT18A(B)0RB AQ18A(B)9RE SH18ZA(B)9 AQ18A(B)0RE AQT24A(B)5RED AQT24A(B)6RED AQ18A(B)9RED AQ18A(B)0RED SH24TA6D SH18ZA0D AQT24C6RB AQT24C6RE AQT18C0RB AQT18C0RE AQT18C0REF AQ18A9RBD AQ18A0RBD AQ24A5RBD AQ24A6RBD 5-10 Samsung Electronics...

  • Page 34: Pcb Inspection

    5-4-2 Procedure The parts should be replaced in the following procedure. Check for any faulty part. Detach the faulty part. Replace it with a new part. Check the operation of the new part. The repair is completed. Samsung Electronics 5-11...

  • Page 35: Detailed Procedure

    1. check voltage of IC06 IC06 is faulty (pin#13, pin#8) Compressor Operating check : relay on 0.7[v] -Set the TURBO mode : relay off 12[v] 2. Voltage at terminal block RY71 is faulty ((N1) -1) rating voltage 5-12 Samsung Electronics...

  • Page 36: Exploded Views And Parts List

    6. Exploded Views and Parts List 6-1 Indoor Unit 18L or 18R 17L or 17R 10-1 You can search for the updated part code number through the ITSELF. URL : http://itself.sec.samsung.co.kr Samsung Electronics...
  • Page 37 ASSY THERMISTER ASSY DB61-10163A CASE-CONTROL ABS(V0) DB94-20037H ASSY BACK BODY ASSY DRAIN: LEFT SIDE DB94-00107A ASSY BACK BODY ASSY DRAIN: RIGHT SIDE DB90-00163A HOLER PIPE DRAIN: LEFT SIDE DB90-00434A HOLER PIPE DRAIN: RIGHT SIDE DB70-10663A PLATE HANGER SGCC-M Samsung Electronics...
  • Page 38 ASSY THERMISTER ASSY DB61-10163A CASE-CONTROL ABS(V0) DB94-20037H ASSY BACK BODY ASSY DRAIN: LEFT SIDE DB94-00107A ASSY BACK BODY ASSY DRAIN: RIGHT SIDE DB90-00163A HOLER PIPE DRAIN: LEFT SIDE DB90-00434A HOLER PIPE DRAIN: RIGHT SIDE DB70-10663A PLATE HANGER SGCC-M Samsung Electronics...
  • Page 39 6-2 Outdoor Unit 6-2-1 18K BTU 12-4 12-3 12-2 12-1 15-2 15-1 15-3 15-6 15-5 15-4 13-1 17-1 17-3 17-4 17-2 17-7 17-6 17-5 Samsung Electronics...
  • Page 40 CONNECT WIRE-POWER 3G, 2.5mm 17-2 DB39-00171A CONNECTOR WIRE 7G,1.00mm OPTION DB39-00171B CONNECT WIRE-ASSY 7G, 1.00mm 17-3 DB67-20011A DRAIN PLUG OUT 17-4 DB63-10355C CAP DRAIN 17-5 DB60-30010A NUT FRARE 1/4” C3771BD 17-6 DB60-30010C NUT FRARE 1/2” C3771BD 17-7 DB73-20134A RUBBER-LEG Samsung Electronics...
  • Page 41 Exploded Views and Parts List 6-2-2 24K BTU 13-1 12-2 13-1 13-1 12-1 13-1 13-1 13-1 13-1 18-1 18-3 18-2 18-6 18-5 18-4 Samsung Electronics...
  • Page 42 OPTION DB39-20546B CONNECT WIRE-POWER 3G, 2.5mm OPTION 18-2 DB39-00171A CONNECTOR WIRE 7G, 1.0mm DB39-00171B CONNECT WIRE-ASSY 7G, 1.0mm 18-3 DB67-20011A DRAIN PLUG OUT 18-4 DB60-30010A NUT FLANGE 1/4” C3771BD 18-5 DB60-30010D NUT FLANGE 5/8” C3771BD 18-6 DB73-20134A RUBBER-LEG Samsung Electronics...

  • Page 43: Remote Control

    6-3 Remote Control & PCB Box 6-3-1 Remote Control Parts List Description Specification Q’TY Remark ASS’Y PCB REMOCON DB93-00251L BATTERY COVER ASS’Y PCB REMOCON DB93-00861L Samsung Electronics...
  • Page 44 Parts List Specification CODE NO Description Remark Q’TY PD-SH30ZC-00 ASS'Y MAIN PCB PD-SH30ZC-00 PD-SH30ZC-02 ASS'Y MAIN PCB PD-SH30ZC-02 DB32-00027B ASS'Y THERMISTOR 103AT 240/240 DB93-00311C ASS’Y PCB DISPLAY ASS’Y DB39-00172A CONNECTOR WIRE DISPLAY AWG#26 DB63-00115A COVER DISPLAY UP ABS, BLK Samsung Electronics...
  • Page 45 MEMO 6-10 Samsung Electronics...

  • Page 46: Refrigerating Cycle Block Diagram

    7-1 Refrigerating Cycle Block Diagram INDOOR UNIT OUTDOOR UNIT Capillary tube Check valve 2-way valve Liquid side Capillary tube Heat Heat exchanger exchanger (Evaporator) (Condenser) Gas side 3-way valve 4-way valve Accumulator Cooling Heating Compressor Gas leak check point Samsung Electronics...

  • Page 47: Pcb Diagrams

    8. PCB Diagrams 8-1 Main PCB 8-1-1 Indoor Unit (PD-SH30ZC-00/PD-SH30ZC-02) Samsung Electronics...
  • Page 48 1WALL,3P/5P,1R,3.96mm,S CN71 CONNECTOR-HEADER 1WALL,3P/5P,1R,3.96mm,S CN73 CONNECTOR-HEADER 1WALL,3P/5P,1R,3.96mm,S CN91 CONNECTOR-HEADER BOX,10P,1R,2.5mm,STRAIG CN43 CONNECTOR-HEADER BOX,3P,1R,2.5mm,STRAIGH CN41 CONNECTOR-HEADER BOX,4P,1R,2.5mm,STRAIGH CN61 CONNECTOR-HEADER BOX,6P,1R,2.5mm,STRAIGH IC07 IC-MASK ROM 93LC56B,8BIT,-,DIP,8P,-,-,- IC03 IC-RESET KA7533,DIP,-,-,-,-,- IC06 IC-DRIVE KID65003AP,DIP,16P,STICK,TR-AR L101 COIL CHOKE 5.0mH,-,8.0*11.0,-,-,PE-M10 WIRE-SO COPPER PI0.6,SN,T,52MM,TAPING_WI PCB-MAIN PD-SH30ZC-00,FR-1,-,-,T1.6,W197 Samsung Electronics...
  • Page 49 PCB-DISPLAY FR-1 T1.6 LED-LAMP SY5511(YEL) LED-LAMP S05511(ORG) MODULE REMCOON FRB-4021H6 C-CERAMIC CA 0A 50V 102Z C-CERAMIC CA 0A 50V 104Z R-CARBON RD 1/4 TP 471-J DIODE SWITCHING 1N4148 JUMP-WIRE 10mm CONNECTOR WAFER SMAW200-10P COVER DISPLAY UP ABS BLK Samsung Electronics...
  • Page 50 PCB-DISPLAY FR-1 T1.6 MODULE REMCOON FRB-4021H6 TACT SWITCH KPT-1105A C-CERAMIC CA 0A 50V 102Z C-CERAMIC CA 0A 50V 104Z DIODE SWITCHING 1N4148 R-CARBON 1/4W, TP, 471-J JUMP-WIRE 10mm CONNECTOR WAFER SMAW200-5P(WHT) CONNECTOR WAFER SMAW200-10P(WHT) •ASS’Y CENTER DISPLALY: DB93-00860A Samsung Electronics...
  • Page 51 MEMO Samsung Electronics...

  • Page 52: Wiring Diagrams

    9. Wiring Diagrams 9-1 Indoor Unit ALL MODEL EXCEPT Samsung Electronics...
  • Page 53 Wiring Diagrams Samsung Electronics...
  • Page 54 TERMINAL BLOCK SOLENOID COIL CRANK CASE HEATER CAPACITOR FAN MOTOR FUSE(2A, 250V~) SPARK KILLER UQ18A(B)9(0)RE, SH18ZA(B)9X UQ18A(B)9(0)RED, SH18ZA(B)0DX, UQ18A(B)9(0)RBD MARK NAME MARK NAME POWER-RELAY TB 1, 2 TERMINAL BLOCK SOLENOID COIL FAN MOTOR CAPACITOR SPARK KILLER FUSE(2A, 250V~) Samsung Electronics...
  • Page 55 Wiring Diagrams UQ24A(B)5(6)RBD MARK NAME MARK NAME MAGNETIC CONTACTOR TB 1, 2 TERMINAL BLOCK SOLENOID COIL FAN MOTOR CAPACITOR SPARK KILLER FUSE(2A, 250V~) INTERNAL TYPE Samsung Electronics...
  • Page 56 MEMO Samsung Electronics...

  • Page 57: Schematic Diagrams

    10. Schematic Diagrams 10-1 Indoor Unit 10-1 Samsung Electronics Samsung Electronics 10-2...
  • Page 58 MEMO 10-3 Samsung Electronics...
  • Page 59 Itself Solution Integrated technology supporting electronic library http://itself.sec.samsung.co.kr Copyright © 2002 By Samsung Electronics Co., Ltd. All rights reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic or machine readable from without prior written permission of Samsung Electronics Co., Ltd.
  • Page 60 ELECTRONICS © Samsung Electronics Co., Ltd. Nov. 2002. Printed in Korea. Code No. DB81-00114A(5)

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