Samsung AS18WJWB Service Manual
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Samsung AS18WJWB Service Manual

Samsung AS18WJWB Service Manual

Room air conditioner
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SERVICE
AIR CONDITIONER

ROOM AIR CONDITIONER

INDOOR UNIT
AS18WJWB
AS18WJWD
AS18WJWE
AST18WJWB
AST18WJWE
AS24W6WB
AS24W6WE
AST24W6WB
AST24W6WE
SC18ZWJ
SC24ZW6
Manual
CONTENTS
OUTDOOR UNIT
US18WJWB
US18WJWD
US18WJWE
UST18WJWB
UST18WJWE
US24W6WB
US24W6WE
UST24W6WB
UST24W6WE
SC18ZWJX
SC24ZW6X

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  • Page 1: Table Of Contents

    ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT AS18WJWB US18WJWB AS18WJWD US18WJWD AS18WJWE US18WJWE AST18WJWB UST18WJWB AST18WJWE UST18WJWE AS24W6WB US24W6WB AS24W6WE US24W6WE AST24W6WB UST24W6WB AST24W6WE UST24W6WE SC18ZWJ SC18ZWJX SC24ZW6 SC24ZW6X Manual SERVICE AIR CONDITIONER CONTENTS 1. Product Specifications 2. Operating Instructions & Installation 3.

  • Page 2: Product Specifications

    1. Product Specifications 1-1 Table AS18WJWB AS24W6WB Model AST18WJWB AST24W6WB Item Indoor unit Outdoor unit Indoor unit Outdoor unit Type Wall-mounted Wall-mounted kcal/h 4,000 5,050 Cooling BTU/h 18,000 24,000 Dehumidifying Air Volume Cooling /min 13.5 14.4 Perfor- mance Noise Cooling...
  • Page 3 CAPILLARY TUBE Freezer Oil Capacity Refrigerant to Change(R22) 1,200 Protection Device(OLP) Internal NDOOR UNIT : DB27˚C WB19˚C OUTDOOR UNIT : DB35˚C WB24˚C Cooling Test Condition NDOOR UNIT : DB32˚C WB23˚C OUTDOOR UNIT : DB54˚C WB24˚C Maximum Operation Condition Samsung Electronics...
  • Page 4 Freezer Oil Capacity Refrigerant to Change(R22) 1,100 1,450 Protection Device(OLP) Internal Internal Cooling Test Condition NDOOR UNIT : DB27˚C WB19˚C OUTDOOR UNIT : DB35˚C WB24˚C NDOOR UNIT : DB32˚C WB23˚C OUTDOOR UNIT : DB54˚C WB24˚C Maximum Operation Condition Samsung Electronics...

  • Page 5: Pressure Graph

    25.0 35.0 45.0 55.0 Outdoor Temp.(DB C) 24K BTU Low Pressure Distribution(Cooling mode) Indoor Temp.( C) DB32.4 / WB24.0 DB30.6 / WB22.5 DB27.0 / WB19.0 DB24.0 / WB17.0 DB21.0 / WB15.0 25.0 35.0 45.0 55.0 Outdoor Temp.(DB C) Samsung Electronics...

  • Page 6: Operating Instructions & Installation

    The On Timer enables you to switch on the air conditioner automatically after a given period of time that is from 1 hour to 24 hours. To set the operating time, press the button one or more times until the required time display. Samsung Electronics...

  • Page 7: Samsung Electronics

    On Timer or Off Timer set. Battery life indicator. If you want to check the battery life, press the button. The longer will remain the battery life. If one battery life indicator remains, replace new batteries. Samsung Electronics...
  • Page 8 SLEEP MODE : Sleep mode is available only in COOL mode. The operation will stop after 6 hours. *In COOL mode : The setting temperature is automatical- ly raised by 1°C each 1hour When the temperature has been raised by total of 2°C, that temperature is maintained. Samsung Electronics...

  • Page 9: Before Installation

    Electric and earth work shall meet the "Electric Facility Technology Standard" and the "Internal Wire Regulation" of the Electric Business Laws. I Inspection & Trial Run Upon completion of the tests, you shall make a trial run while you explain the main functions of the air conditioner to finish the installation. Samsung Electronics...

  • Page 10: Installation Diagram Of Indoor Unit And Outdoor Unit

    3-Way valve. And mount the service port cap to 3-Way valve. (gas) 7) Check for gas leakage. - At this time, especially check for gas leakage from the 3-Way valve’s stem nuts, (liquid) and from the service port cap. Valve stem Stem cap Samsung Electronics...
  • Page 11 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. Samsung Electronics...

  • Page 12: Pump Down" Procedure

    • Make sure you do not bend the connection pipes in the middle and store together with the cables. • Move the indoor and outdoor units to a new location. • Remove the mounting plate for the indoor unit and move it to a new location. Samsung Electronics...

  • Page 13: Disassembly And Reassembly

    2) Open the Front Grille by pulling right and left sides of the hook. 3) Loosen 1 of the right screw and detach the Terminal Cover. 4) Detach the thermistor from the Front Grille. 5) Loosen 3 fixing screws of Front Grille. Samsung Electronics...
  • Page 14 1) Take all the connector of PCB upper side (Main PCB) out. (Inclusion Power Cord) 2) Detach the outdoor unit connection wire from the Terminal Block. 3) Loosen 4 fixing screws of Ass'y Control-In. Tray Drain 1) Pull Tray Drain out from the Back Body. Samsung Electronics...
  • Page 15 5) Lifting the Heat Exchanger up a little to push the up side for separation from the indoor unit. Fan Motor 1) Loosen the fixing screw. & 2) Detach the Fan Motor from the Fan. Cross Fan 3) Detach the Fan From the left Holder Bearing. Samsung Electronics...
  • Page 16 Cabinet-Side edge and a fixing screw on the Cabinet-Front lower to detach the Cabinet-Front. 3) Loosen the fixing screws of the Ass'y-Control Out. 4) Loosen the fixing screws of the Cabinet-Side RH. 5) Loosen the fixing screws of the Cabinet-Side LF. Samsung Electronics...
  • Page 17 1) Loosen the Terminal Cover nut to open the Compressor Terminal Cover. 2) Disassemble the cloth sound felt. 3) Disassemble the pipe in both inlet and outlet of the Compressor with welding torch. 4) Loosen the 3 bolts at the bottom. 5) Detach the Compressor. Samsung Electronics...
  • Page 18 1) Loosen the fixing screw of the Cover Control. 2) Loosen the fixing screws of the Cabinet-Upper. 3) Loosen the fixing screws of the Cabinet-Side RH. 4) Loosen the fixing screws of the Cabinet-Side LF. 5) Loosen the fixing screws of the Ass'y Control Out. Samsung Electronics...
  • Page 19 1) Loosen the Terminal Cover to open the Terminal Cover. 2) Disassemble the Cloth Sound Felt. 3) Disassemble the pipe in both inlet and outlet of the Compressor with welding torch. 4) Loosen 3 bolts at the bottom. 5) Detach the Compressor. Samsung Electronics...

  • Page 20: Refrigerating Cycle Diagram

    4. Refrigerating Cycle Diagram Indoor Unit Outdoor Unit Capillary tube 2-Way valve Liquid side Heat Heat Exchanger Exchanger (Evaporator) (Condenser) Gas side 3-Way valve Cooling Compressor Gas leak check point Samsung Electronics...
  • Page 21 45.0 55.0 Outdoor Temp.(DB C) 24K BTU Cooling Capacity Distribution 30,000 20,000 Indoor Temp.( C) DB32.4 / WB24.0 DB30.6 / WB22.5 DB27.0 / WB19.0 DB24.0 / WB17.0 DB21.0 / WB15.0 10,000 25.0 35.0 45.0 55.0 Outdoor Temp.(DB C) Samsung Electronics...
  • Page 22 24K BTU Power consumption Distribution(Cooling mode) 4,000 3,500 3,000 2,500 Indoor Temp.( C) 2,000 DB32.4 / WB24.0 DB30.6 / WB22.5 DB27.0 / WB19.0 DB24.0 / WB17.0 1,500 DB21.0 / WB15.0 1,000 25.0 35.0 45.0 55.0 Outdoor Temp.(DB C) Samsung Electronics...

  • Page 23: Set Up The Model Option

    Every time you push the button, the display panel reads . . . repeatedly. Setting Option SEG4. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
  • Page 24 Every time you push the button, the display panel reads . . . repeatedly. Setting Option SEG10. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
  • Page 25 If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press 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 its model. Samsung Electronics...
  • Page 26 5-2 Table of the option Code Option Code Model SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 AS18WJWB AS18WJWE AST18WJWB AST18WJWE SC18ZWJ AS18WJWD AS24W6WB AS24W6WE AST24W6WB AST24W6WE SC24ZW6 Samsung Electronics...

  • Page 27: Troubleshooting

    The compressor stops intermittently or the fan speed of the The compressor stops intermittently in a COOL mode or indoor unit decreases to prevent inside/outside air frozen DRY mode, and fan speed of the indoor unit decreases. depending on the inside/outside air temperature. Samsung Electronics...
  • Page 28 Problem with the outdoor unit or PCB outdoor unit remote control. • In 3 minutes, check the voltage No power source Problem with the relay (RY71) or PCB between the indoor unit terminal displayed. block N1 and 1. Samsung Electronics...
  • Page 29 Check whether the fuse Replace fuse on the control board is normal. F701: 3.15[A]/250[V] Check the output of SMPS on the control board. Input power: AC230±15%[V] Replace the control board IC02 Input: DC12[V] IC02 output: DC5[V] N Check the setting temperature Samsung Electronics...

  • Page 30: When The Indoor Unit Fan Does Not Operate. (Initial Diagnosis)

    Test rod location Normal Voltage PCB CN72 Condition About AC pin #3 and #5 Fan operate 180V Replace Motor Motor Fan-Capacitor is out of order Fan-Capacitor Fan motor Fan motor is out of order. should be replaced. Samsung Electronics...

  • Page 31: When The Outdoor Unit Does Not Operate. (Initial Diagnosis)

    Is rating voltage ±10% range applied relay between Power relay is Power relay should be Terminal block No. N1 and No. 1 out of order replaced. Outdoor unit is out of order. Is the room sensor normal register? 10°C 20°C 30°C 17.96kΩ 12.09kΩ 8.3kΩ Samsung Electronics...
  • Page 32 Voltage at pin #57~#60 Micom (IC04) is faulty. of micom (IC04) change? (Squarewave) Voltage at pin #13 ~ #16 of Driver IC06/08 (ULN2003A) is faulty. IC06(ULN2003A) change? (Squarewave) UP/DOWN louver motor is faulty. Samsung Electronics...
  • Page 33 Is the voltage between Abnormal IC05 CN71 #1 and CN71 #5 rating voltage ±10% range Abnormal 4-Way valve of Outdoor Unit. Abnormal RY73 or connecting Cable PCB should be replaced. 4-Way valve should be replaced or connecting Cable Check. Samsung Electronics...

  • Page 34: Room Temperature Sensor Failure

    SENSOR Resistance Value : 40˚C-5.83kΩ Connect the sensor to CN43, supply power, and measure the voltage of #1 and #2 of the CN43 connector. Poor ASS'Y PCB Replace Below 0.5V? Poor ASS'Y PCB Replace Over 4.9V? MICOM Error or Connector(CN43) check Samsung Electronics...
  • Page 35 When the voltage descends below 3V, the assembly module PCB is normal and the main PCB is poor. Then replace the main PCB. 3. Replace the assembly display PCB because the module PCB is poor if the voltage between No. 2~3 of CN91 maintains 5V after the remote control starts operation. Samsung Electronics...

  • Page 36: Pcb Inspection Method

    2) The fan motor of the indoor unit doesn't run. • Fan Motor Connector(CN72) is faulty 3) The power voltage between terminal #3 and #5 • ASS'Y Main PCB is faulty • Connection is faulty of the connector(CN72) is 0V. Samsung Electronics...
  • Page 37 32.430 3.537 6.941 14.680 33.890 3.652 7.192 15.280 35.430 3.772 7.455 15.900 37.050 3.897 7.729 16.550 38.760 4.026 8.015 17.240 40.560 4.161 8.313 17.960 Temperature Sensor Characteristic Curve Temperature (˚C) At the temperature of 25˚C(10KΩ) Resistance Value (Kohm) Samsung Electronics...

  • Page 38: Main Part Inspection Method

    ∞, 0Ω . . . Open or Short Abnormal Stepping Motor Measure the resistance between the red wire and each terminal wire with a tester. Normal About 300Ω at the normal temperature (20˚C ~ 30˚C) ∞, 0Ω . . . Open or Short Abnormal Samsung Electronics...

  • Page 39: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Indoor Unit You can search for the updated part code number through the ITSELF. URL : http://itself.sec.samsung.co.kr Samsung Electronics...
  • Page 40 Exploded Views and Parts List Parts List Q'TY Code No. Description Specification AS18WJWB AS18WJWD AST18WJW✳ SC18ZWJ AS18WJWE DB94-00615A ASS'Y BACK BODY ASS'Y DB61-01974A BODY BACK HIPS DB69-01039A CUSHION-BACK BODY FO-PS DB96-03913A ASS'Y CYCLE IN ASS'Y DB63-01065A COVER-BEARING DB60-00192A SPACER-EVAP LOW...
  • Page 41 ASSY REMOCON ASS'Y DB96-03817A ASS'Y EVAP-SUPPORT ASS'Y DB31-00267A MOTOR FAN YFK 40 4C DB94-00456B ASS'Y-CROSS FAN ASS'Y DB97-02075A ASS'Y-BOLT SPECIAL M5xL6 DB73-00181A RUBBER-BEARING RUBBER DB94-40007A ASS'Y BEARING-MOTOR ASS'Y DB61-01977A BRACKET-EVAP SGCC-M DB93-01638D POWER CORD 250V,20A DB93-01638E POWER CORD 250V,20A Samsung Electronics...
  • Page 42 MEMO Samsung Electronics...
  • Page 43 7-2 Outdoor Unit 18K BTU 14-2 14-3 14-1 Samsung Electronics...
  • Page 44 48D190IT1EH-SS ROTARY COMPRESSOR ASS'Y 48B180MT3EH-SS ROTARY COMPRESSOR ASS'Y DB96-03964A ASS'Y COND ASS'Y DB62-03032A INSULATION-SOUND FELT DB96-04356B ASS'Y TUBE CAPILLARY ASS'Y DB96-04350A ASS'Y TUBE DISCHARGE ASS'Y DB96-04350B ASS'Y TUBE DISCHARGE ASS'Y DB96-04349A ASS'Y TUBE SUCTION ASS'Y DB71-00093A BAR-STEEL HSWR Samsung Electronics...
  • Page 45 C-OIL 50uF/450VAC 14-3 DB65-00167A TERMINAL BLOCK DB65-00164C TERMINAL BLOCK 48B200JT1EH-SS ROTARY COMPRESSOR ASS'Y DB96-03964A ASS'Y COND ASS'Y DB62-03032A INSULATION-SOUND FELT DB96-04356A ASS'Y TUBE CAPILLARY ASS'Y DB96-04350A ASS'Y TUBE DISCHARGE ASS'Y DB96-04349A ASS'Y TUBE SUCTION ASS'Y DB71-00093A BAR-STEEL HSWR Samsung Electronics...
  • Page 46 MEMO Samsung Electronics...
  • Page 47 Exploded Views and Parts List 24K BTU 16-4 16-1 16-3 16-2 Samsung Electronics...
  • Page 48 ASS'Y CONTROL OUT ASS'Y DB93-03238D ASS'Y CONTROL OUT ASS'Y 16-1 3501-000305 RELAY EL200/240A1-F 16-2 2501-001239 C-OIL 45uF/450VAC 2501-001240 C-OIL 50uF/450VAC 16-3 DB65-00164B TERMINAL BLOCK 16-4 2301-001379 C-FILM 4uF/450VAC DB72-00630C INSULATION-SOUND FELT DB90-01351A ASS'Y CABINET-LF ASS'Y DB71-00088A BAR-STEEL MSWR Samsung Electronics...
  • Page 49 DB93-02793A ASS'Y-S/W & DISPLAY PCB ASS'Y DB70-00507A PLATE-TERMINAL LOW SGCC-M, T1.2 DB61-01980A HOLDER-WIRE CLAMP 6001-000929 SCREW-MACHINE PH M3xL22 6001-001054 SCREW-MACHINE TH M4xL10 DB39-00147A C/W STEP MOTOR UP/DOWN ASS'Y DB32-00020D ASS'Y-THERMISTOR 4P(103AT) DB63-00851A COVER LAMP ABS(V0) DB73-00242B RUBBER-BAND RUBBER Samsung Electronics...

  • Page 50: Block Diagram

    STEPPING MOTOR • 4-WAY VALVE DRIVE(*) : BLADE UP/DOWN ON, OFF TIMER SELECT TEMPERATURE DC5V SELECT VOLTAGE REGULATOR SLEEP SELECT DC12V ENERGY SAVING SMPS POWER BLOCK BATTERY CHECK AC INPUT ✳ (*)marks : In case of heat pump model. Samsung Electronics...

  • Page 51: Wiring Diagram

    9. Wiring Diagram 9-1 Indoor Unit AST18WJWB / AST18WJWE Code No : DB98-20816A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 52 Indoor Unit(cont.) AS18WJW✳ / SC18ZWJ Code No : DB98-20815A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 53 Wiring Diagram 24K BTU Code No : DB98-20813A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 54 9-2 Outdoor Unit UST18WJWB / UST18WJWE MARK NAME FAN MOTOR Code No : DB98-20936A US18WJW✳ / SC18ZWJX MARK NAME FAN MOTOR Code No : DB98-21316A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 55 Wiring Diagram 24K BTU MARK NAME FAN MOTOR Code No : DB98-20929A This Document can not be used without Samsung's authorization. Samsung Electronics...
  • Page 56 MEMO Samsung Electronics...
  • Page 57 MEMO Samsung Electronics...
  • Page 58 ELECTRONICS © Samsung Electronics Co., Ltd. Jan. 2005. This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable Printed in Korea. International and/or domestic law. Code No. DB98-21180A(1)

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