Samsung AQ24A1QE Service Manual

Room air conditioner
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SERVICE
AIR CONDITIONER
ROOM AIR CONDITIONER
INDOOR
AQ24A1QE
AQ24B1QE
AQ18A1QE
AQ18B1QE
Manual
I n s t a l l a t i o n
OUTDOOR
UQ24A1QE
UQ24B1QE
UQ18A1QE
UQ18B1QE
CONTENTS

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Summary of Contents for Samsung AQ24A1QE

  • Page 1: Table Of Contents

    ROOM AIR CONDITIONER INDOOR OUTDOOR AQ24A1QE UQ24A1QE AQ24B1QE UQ24B1QE AQ18A1QE UQ18A1QE AQ18B1QE UQ18B1QE SERVICE Manual AIR CONDITIONER CONTENTS 1. Pre c a u t i o n s 2. Product Specifications 3. Operating Instructions and I n s t a l l a t i o n 4.
  • Page 2 © Samsung Electronics Co., Ltd. SEP. 1998. Printed in Korea. Code No. DB81-10168A(2)
  • Page 3: Precautions

    9 . Keep children away from the unit while it is being re p a i re d . Fig. 1-3 No Kids Nearby! 1 0 . Be sure to clean the unit and its surro u n d- ing are a . Fig. 1-4 Clean the Unit Samsung Electronics...
  • Page 4 M E M O Samsung Electronics...
  • Page 5: Product Specifications

    D i m e n s i o n s & Package dimensions Height Weight Width 1153 1153 1023 Depth Weight 63.0 46.0 Shipping 67.0 50.0 Remarks : Rating Conditions are : Indoor air temperature 27˚C DB/19˚C WB Outdoor air temperature 35˚C DB/24˚C WB Samsung Electronics...
  • Page 6: Major Component Specifications

    17AM037A5 Operating temp. Open ˚C 135±5˚C 150±5˚C Close ˚C Run capacitor µF x VAC 3µF X 450VAC 2.5µF X 450VAC Coil AL-FIN/Copper tube AL-FIN/Copper tube Heat Rows x Steps 2 X 24 2 X 24 Exch. Fin pitch Samsung Electronics...
  • Page 7 2-3 Dimensions 2-3-1 Indoor Unit (Remote control) (Front view) 1080 (Rear view) 2-3-2 Outdoor Unit 2-3-2(a) UQ24A1QE, UQ24B1QE (Front view) (Rear view) Samsung Electronics...
  • Page 8 Product Specifications 2-3-3(b) UQ18A1QE, UQ18B1QE (Front view) (Rear view) Samsung Electronics...
  • Page 9: Pressure Graph

    U Q 2 4 B 1 Q E Indoor Unit : A Q 1 8 A 1 Q E Outdoor Unit : UQ18A1QE A Q 1 8 B 1 Q E U Q 1 8 B 1 Q E Samsung Electronics...
  • Page 10 M E M O Samsung Electronics...
  • Page 11 Without regard to ON/OFF condition in remote controller, use this button to set current time. TIME Adjust the current time using button. (Data can be transmitted after setting up the time) Samsung Electronics...
  • Page 12 7. FAN SPEED : Manual / Auto De-ice end by sensing of the pro c e s s i n g Fan speed automatically varies depending time by de-ice Condition. on both the diff e rence between setting and the room temperature . Samsung Electronics...
  • Page 13 The LCD also displays the time re m a i n i n g . 1 3 . BUZZER SOUND : Whenever the ON/OFF button is pressed or whenever change occurs to the condition which is set up or select, the compulsory operation mode, buzzer is sounded "beep" Samsung Electronics...
  • Page 14 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 15: Installation Diagram Of Indoor Unit And Outdoor Unit

    125mm or more Cut the piping hole sloped slightly Remote control Remote control holder Piping (Liquid) 1/4" Clamper tube 18K BTU Piping(Gas) 1/2” Installation plate 24K BTU Piping(Gas) 5/8” Installation tube Pipe-connection Vinyl tape Screw Putty Drain hose Samsung Electronics...
  • Page 16 Result : All inert gas escapes from the indoor unit. • To prevent dirt or foreign objects from getting into the pipes during installation, do NOT remove the caps completely until you are ready to connect the piping. Samsung Electronics...
  • Page 17: Operating Instructions And

    4. Pass the drain hose through the hole in the wall, making sure that it is sloping downwards, as shown in the illustrations above. The hose will be fixed permanently into position once Shield the whole installation has been tested for gas leaks; refer to page 16 for further details. Drain hose Extension drain hose Samsung Electronics...
  • Page 18: Samsung Electronics

    In heating and deice operation, condensed water may be generated. Hole Install drain line as following pro c e d u re . Drain plug Base 1. Insert the drain plug into base hole 2. And then connect drain hose to drain plug. Drain Hose Samsung Electronics...
  • Page 19 Caution : Burrs not removed may result in leakage of gas. Pipe Reamer Oblique Raughness Burr 3 ) Insert a flare nut into the pipe and modifty flare . Outer diameter A(mm) ø6.35mm ø9.52mm ø12.7mm ø15.8mm * Unproper flaring Inclined Surface Cracked Uneven damaged thickness Samsung Electronics...
  • Page 20 Liquid pipe side Gas pipe side 6. Open the 2-way valve and 3-way valve completely 2-way valve 3-way valve Outdoor Unit 7. Close the cap of each valve. 8. Check each valve for leakage. 3-10 Samsung Electronics...
  • Page 21 7. Stop operation of the air conditioner. 8. Close the 3-way valve, disconnect the pressure gauge, and open the 3-way valve again. 9. Close the cap of each valve. 3-11 Samsung Electronics...
  • Page 22 Add “A” of refrigerant refrigerant cylinder. Add “A” of refrigerant 5~10m (R-22) for every 1m. (R-22) for every 1m. MODEL “A” AQ24A1QE AQ24B1QE AQ18A1QE AQ18B1QE 3-2-2(j) Flare unt fixing torque Torque (kg-cm) Outter diameter Fixing Torque Final Torque ø...
  • Page 23 At this time, cover the pipe of the indoor 8. Remove the mounting plate for the indoor unit and the other pipe using a cap or vinyl unit and move it to a new location. plug to avoid foreign material entering. 3-13 Samsung Electronics...
  • Page 24: Disassembly And Reassembly

    7) Pull the upper left and right 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 and right. Samsung Electronics...
  • Page 25 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 26 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 27: Outdoor Unit

    Fan Motor & 1) Do Procedure 1 above. Propeller Fan 2) Remove the nut flange. (Turn to the right to remove as it is a left turned screw) 3) Disassemble the propeller fan. Samsung Electronics...
  • Page 28: Troubleshooting

    Indoor unit Room sensor Error (open or short) 3 O P E R ATING and TIMER LED blinking (1Hz) Indoor unit heat exchanger temperature sensor Error (open or short) 4 FAN LEA blinking (1Hz) Indoor fan malfunctioning (for spead is Below 38Orpm) Samsung Electronics...
  • Page 29: Fault Diagnosis By Symptom

    Check PCB pattern . Replace ICO2 10ms Replace main PCB. Is voltage output terminal of D101~D105(IN4007) normal? Are voltage at #30 and #31 of the micom normal? Replace resonator (X501) 100ns Replace IN4007 Is operation normal? Replace micom Samsung Electronics...
  • Page 30 Is the supply voltage of the fan out of order. replaced. motor sufficient? Test rod location Normal voltage PCB CN73 Condition Fan operate AC 180V MF-C is out of order Replace MFC Fan motor Fan motor should be replaced. is out of order. Samsung Electronics...
  • Page 31 Is AC 198 - 264V applied relay between Terminal Tap(TB71) and RY out of order replaced. 71 terminal No. 3 Outdoor unit is out of order. 1 NO 2 NO Is the room sensor normal register? 10°C 20°C 30°C 17.96k Ω 12.09k Ω 8.3k Ω YES 3 Samsung Electronics...
  • Page 32: Tro U B L E S H O O T I N H

    Is the munber #12 of IC07 (KID65003) LOW? Abnormal IC07 Is the voltage between CN71 #1 and RY71 NO AC198~264? Abnormal RY73 Abnormal 4way valve of Outdoor Unit. or connecting Cable PCB should be replaced. 4 way valve should be replaced or connecting Cable Check. Samsung Electronics...
  • Page 33: If Operation By Remote Control Unit Is Impossible. (Initial Diagnosis)

    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 34: Pcb Inspection

    The parts should be replaced in the following pro c e d u re . 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...
  • Page 35 CN73 : RMC switch pushed. above 180V~ 1. [FAN] mode 2. Poor connection of indoor fan motor 2. Fan speed [Hi] 2. Indoor unit fan motor does not operate. 3. Continuously operation and connector of RPM sensing (CN43) Samsung Electronics...
  • Page 36: Fault Diagnosis Of Major Parts

    Black, Red ∞, O Ω … open or short Abnormal Measure resistance between red wire and each terminal. Stepping Motor Normal Approx. 380Ω at ambient temperature (20°C ~30°C) (UP/DOWN swing motor) ∞, O Ω … open or short Abnormal Samsung Electronics...
  • Page 37: Exploded Views And Parts List

    6. Exploded Views and Parts List 6-1 Indoor Unit Samsung Electronics...
  • Page 38 HOLDER BEARING 14-3 DB94-40007A BEARING DB93-10545A ASS´Y MAIN PCB AQ24B1QE/B DB93-10555A ASS´Y MAIN PCB AQ18B1QE/B DB32-10008E ASS´Y-TERMISTOR 103AT DB61-10163A CASE CONTROL ABS(VO) DB94-20037A ASS´Y BACK BODY HIPS DB61-40246A HOLDER PIPE DB70-10663A PLATE HANGER SGCC-M DB26-10065B TRANSFORMER AC230V / DC17V Samsung Electronics...
  • Page 39 6-2 Outdoor Unit 6-2-1 UQ18A1QE/UQ18B1QE 13-2 14-3 14-1 15-4 14-2 15-1 15-5 13-1 15-3 15-2 18-1 18-4 18-5 18-2, 18-3 18-7 18-6 Samsung Electronics...
  • Page 40 4G,1.00mm2 18-2 DB39-10058A CONNECTOR WIRE 18-3 DB39-20235A CONNECTOR WIRE 2G,0.75mm2 18-4 DB67-20011A DRAIN PLUG OUT 18-5 DB63-10355C CAP DRAIN 18-6 DB60-30010A NUT FLANGE 1/4” C3771BD C3771BD 18-7 DB60-30010C NUT FLANGE 1/2” DB63-30130C SCREEN-GUARD PHF 100Y SC-90073T DB63-30025D GUARD-COND Samsung Electronics...
  • Page 41 6-2-2 UQ24A1QE/UQ24B1QE 13-2 14-3 14-1 14-2 15-4 15-1 15-5 13-1 15-3 15-2 18-1 18-4 18-2, 18-3 18-7 18-6 Samsung Electronics...
  • Page 42 CLOTH SOUND COMP DB72-50614A CLOTH SOUND UP 3G,2.5mm 18-1 DB39-20546A CONNECTOR POWER 18-2 DB39-10058A CONNECTOR WIRE 4G,1.0mm 18-3 DB39-20235A CONNECTOR WIRE 2G,0.75mm 18-4 DB67-20011A DRAIN PLUG OUT C3771BD 18-5 DB60-30010A NUT FLANGE 1/4” C3771BD 18-6 DB60-30010D NUT FLANGE 5/8” Samsung Electronics...
  • Page 43 LABEL DOOR ART 90 PH-M2 SCREW TAP PH-M2 DB67-60061A SPRING BATTERY SUS 304 DB67-60062A SPRING BATTERY SUS 304 DB67-60063A SPRING BATTERY SUS 304 90 X 250 PE BAG 90 X 250 DB93-40179C ASS’Y PCB REMOCON DB61-40243A HOLDER REMOCON Samsung Electronics...
  • Page 44 Exploded Views and Parts List 6-3-2 PCB Box Parts List Q’TY Specification CODE NO Description Remark AQ24A1QE AQ18A1QE AQ24B1QE AQ18B1QE DB61-10151A CASE-CONTROL DB93-10545A ASS'Y MAIN PCB AQ24B1QE/B DB93-10555A ASS'Y MAIN PCB AQ18B1QE/B DB32-10008E ASS'Y THERMISTOR 103AT 240/240 DB93-10600A ASS’Y PCB DISPLAY...
  • Page 45 M E M O Samsung Electronics...
  • Page 46: Block Diagrams

    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(DB93-10545B) : 24K BTU (DB93-10555B) : 18K BTU Samsung Electronics...
  • Page 48 WIRE SO COPER PI0.6 SN T 52MM OPJ1, OPJ2, OPJ3 CN72 CONNECTOR WAFER YW396-03AV WHT CN11 ” SMW250-03 RED F101 DB47-90053A FUSE FST 250V~2A IC08 EEORIM 93C5L R903 R-CARBON RD 1/2T(S) 471-J C701 2305-001027 C-FILM, MPEF 224K C702 ” 104K Samsung Electronics...
  • Page 49 C/W DIS & MODULE UL1007 AWG#26/9 DB61-10192A (R) CASE-CENTER PCB UP PC(BLU) DB61-10193A (R) CASE-CENTER PCB LOW ABS(BLK) DB72-10240A SEAL C/T PCB UP (L) 30FOAM-PE, T=3 DB72-10240B SEAL C/T PCB UP (R) 30FOAM-PE, T=3 DB72-10239A SEAL C/T PCB LOW 30FOAM-PE, T=3 Samsung Electronics...
  • Page 50: Wiring Diagrams

    9. Wiring Diagrams 9-1 Indoor Unit Samsung Electronics...
  • Page 51 U Q 1 8 A 1 Q E / U Q 1 8 B 1 Q E MARK NAME MARK NAME MAGNETIC CONTACTOR TB 1, 2 TERMINAL BLOCK SOLENOID COIL FAN MOTOR FUSE(2A, 250V~) SPARK KILLER CAPACITOR 3.0/40MF X 450VAC Samsung Electronics...
  • Page 52 And if you need more information, please see the service bulletin Copyright Tr a d e m a r k s Samsung is a registered trademark and ®œ 1995 by Samsung Electronics Co., Ltd. SyncMaster 17GLi/CMG7387L and MacMaster All rights reserved. Cable Adapter are trademark of Samsung This manual may not, in whole or in part, be Electronics Co., Ltd.
  • Page 53: Schematic Diagrams

    10. Schematic Diagrams 10-1 Indoor Unit 10-1 Samsung Electronics...

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