LG LSU301CE Svc Manual
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LG LSU301CE Svc Manual

LG LSU301CE Svc Manual

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This Owner's Manual is provided and hosted by Appliance Factory Parts.
LG LSU301CE
Owner's Manual
Shop genuine replacement parts for LG LSU301CE
Find Your LG Air Conditioner Parts - Select From 2328 Models
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Summary of Contents for LG LSU301CE

  • Page 1 This Owner's Manual is provided and hosted by Appliance Factory Parts. LG LSU301CE Owner's Manual Shop genuine replacement parts for LG LSU301CE Find Your LG Air Conditioner Parts - Select From 2328 Models -------- Manual continues below --------...

  • Page 2: Room Air Conditioner

    Internal Use Only http://biz.lgservice.com Room Air Conditioner SVC MANUAL(Exploded View) MODEL : LS301HE LS301CE CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.

  • Page 3: Table Of Contents

    Refrigeration Cycle Diagram ........................50 Pipe length and the elevation ........................51 3-way Valve ..............................52 Cycle Parts...............................57 Electronic Parts ............................58 Exploded View...............................68 - 2 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Safety Precautions

    .Do not modify or extend the power cord. securely. • There is risk of fire of electric shock. • No grounding may cause electric shock. - 3 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 • If the base collapses, the air conditioner could fall product. with it, causing property damage, product failure, and personal injury. - 4 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 • There is risk of fire, failure of the product, or electric • There is risk of fire or failure of product. shock. - 5 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 Use two or more people to lift and transport the air conditioner. • To avoid vibration or water leakage. • Avoid personal injury. 90˚ - 6 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 • There is risk of personal injury and failure of product. • There are sharp and moving parts that could cause personal injury. - 7 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Dimensions

    Indoor Unit Tubing hole cover Tubing hole cover Installation plate Model 30k SERIES Dimension 1,259(49.6) mm(inch) 349(13.7) mm(inch) 205(8.1) mm(inch) - 8 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 10: Outdoor Unit

    25(1.0) mm(in ch) 546(21.5) mm(in ch) 162(6.4) mm(in ch) 162(6.4) mm(in ch) 54(2.1) mm(in ch) 74.5(2.9) mm(in ch) 79(3.1) - 9 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Product Specifications

    Net Weight Indoor kg(lbs) Outdoor kg(lbs) * Design and Specifications subject to change without prior notice for product improvement. - 10 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Cooling & Heating

    Net Weight Indoor kg(lbs) Outdoor kg(lbs) 33(72.8) * Design and Specifications subject to change without prior notice for product improvement. - 11 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Installation

    A minimum pipe run of 7.5meters(25ft) is required to minimise vibration & excessive noise. Oil trap Indoor unit Indoor unit In case more than 5m(16.4ft) - 12 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: How To Fix Installation Plate

    Drilling the hole through the wall for piping con- nections must be done safely. Left rear piping Right rear piping 50mm(2.0") 180mm ø 70mm(2.76") (7.2") - 13 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Flaring Work And Connection Of Piping

    (not possible to put them on after flaring work) = Improper flaring = Flare nut Copper tube Inclined Surface Cracked Uneven damaged thickness Even length all round - 14 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Connection Of Piping-Indoor

    3. Remove the lower panel by the arrow. I Take care not to scratch the wall and mat to drop. Lower panel - 15 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Drain pipe Indoor unit drain hose Vinyl tape(narrow) Three upper Adhesive hooks Indoor unit Installation plate Three lower hooks - 16 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 Wrap with vinyl tape Pipe Vinyl tape(wide) Drain hose - 17 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 Vinyl tape(narrow) Connection pipe Torque wrench Connecting cable Indoor unit tubing Pipe Size[Torque] Capacity (Btu/h) Suction Evaporator 5/8"[6.6kg.m] 3/8"[4.2kg.m] - 18 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 I Refix the front right side panel to the original position with the two screws. - 19 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Connection Of The Drain Hose

    (Btu/h) Suction Evaporator 5/8"[6.6kg.m] 3/8"[4.2kg.m] Outdoor unit Gas side piping (Bigger diameter) Liquid side piping (Smaller diameter) Torque wrench - 20 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Connecting The Cable Between Indoor Unit And Outdoor Unit

    • Must be rated for 30 amps Indoor Outdoor unit unit 61cm max 61cm max (24 in max) (24 in max) - 21 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Connect The Cable To The Outdoor Unit

    9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active(phase) conductors. - 22 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Checking The Drainage And Forming The Pipings

    Left side panel Waving leakage leakage Tip of drain hose Less than dipped in water 50mm gap Water leakage Ditch - 23 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 25: Form The Piping

    Trap Taping Drain hose Pipings Connecting cable Trap is required to prevent water from entering into electrical parts. - 24 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Air Purging

    150 P.S.I.G. Next, test for leaks with liquid soap. Nitrogen gas cylinder(in vertical standing position) - 25 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 This completes air purging with a vacuum pump. The air conditioner is now ready to test run. Vacuum pump - 26 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 28: Test Running

    2. Measure the temperature of the intake and dis- refrigerant gas will have been collected in the outdoor charge of air. unit. - 27 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Operation

    • The louver can be set at the desired position or swing up indoor pipe temperature will be and down automatically. reached at 82°F(28°C). - 28 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Remote Controller

    Airflow Direction Control Fan Operation Mode : Fan Operates without cooling or heating. Horizontal Airflow Direction Control Button(Option) Reset - 29 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 31: The Function Of Main Control

    • Compressor and outdoor fan stop when indoor pipe temperature is below 32°F(0°C) and restart at the pipe temperature is above 45°F(7°C). - 30 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 INTAKE AIR TEMP. SETTING TEMP. +1°F (Compressor OFF) SETTING TEMP. -1°F (Compressor ON) INDOOR FAN SPEED The electronic control operation COMPRESSOR - 31 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 ➲ Setting Temp-1°F Compressor OFF Temp. • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed. - 32 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 • The operation diagram is shown below. INDOOR PIPE 1min TEMP. 82°F 78°F Selecting INDOOR FAN SPEED fan speed COMPRESSOR - 33 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 3 minutes 3 minutes 3 minutes INDOOR FAN SPEED Low or OFF Low or OFF Low or OFF COMPRESSOR - 34 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 36: Forced Operation

    If you do not want to use this operation, move the Slide Switch to the Remote Control position. - 35 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 37: Display Function

    • Outdoor pipe temperature • Outdoor TH assy check thermistor open/short. 3sec 3sec (5times) • Communication line/circuit • Poor communication. check 3sec - 36 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 38: Name And Function-Remote Control (Cooling Models)

    Used to set the desired horizontal airflow direction. CANCEL °C / °F RESET BUTTON Used prior to resetting time or after replacing batteries. - 37 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Name And Function-Remote Control (Heat Pump Models)

    Used to set the desired horizontal airflow direction. CANCEL °C / °F RESET BUTTON Used prior to resetting time or after replacing batteries. - 38 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 40: Disassembly

    I Take care not to scratch the wall and mat to drop. Lower panel ™ Remove the left side pane. (Remove the 2 screws.) Left side panel - 39 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 Conductor holder, Motor, Evaporator and P.C.B. Earth Power Conductor Conductor Sensor Conductor Step Motor Conductor - 40 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. - 41 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 7. To remove the Cross-Flow Fan • Loosen the screw securing the holder bearing. • Lift up the cross-flow fan. Holder bearing Screw - 42 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 44: Schematic Diagram

    Schematic Diagram Schematic Diagram Heat Pump/Cooling Only Series(Indoor Unit) - 43 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Heat Pump Series (Outdoor Unit)

    Schematic Diagram Heat Pump Series (Outdoor Unit) R02F R03F R04F R05F R06F 222*2 330uF 330nF 561*2 - 44 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 46: Indoor Unit P.w.b. Assembly

    OSC01B ASM:6871A20558 C13M IC10 JP25 C01C IC01A C02A C02H C03H C02C C06D C10D C07D C09D C08D IC04D BOTTOM VIEW - 45 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Outdoor Unit P.w.b. Assembly

    C 1 0 J C 0 9 J C 0 1 A I C 0 1 M C08J C 1 0 D - 46 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 48: Display P.w.b. Asm

    Schematic Diagram DISPLAY P.W.B. ASM I Model: LS301CE, LS301HE - 47 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 49: Wiring Diagram

    Schematic Diagram Wiring Diagram (1) Indoor Unit (Cooling Only Models, & Heating Models) - 48 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 Schematic Diagram (2) Outdoor Unit • Cooling Only Models • Heating Models - 49 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 51: Troubleshooting Guide

    HEAT EXCHANGER EXCHANGER (EVAPORATOR) (CONDENSER) Suction Line REVERSING 3-WAY VALVE ACCUMU VALVE LATOR (Heating Model Only) COOLING COMPRESSOR HEATING - 50 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 52: Pipe Length And The Elevation

    * Capicity is based on standard length and maximum allowance length is the basis of reliability. * Oil trap should be installed per 5~7 meters(16.4~23.0ft). - 51 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 53: 3-Way Valve

    – Open the low-pressure valve on the charge set slightly to air purge from the charge hose. (5) Set the liquid side valve to the closed position. - 52 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 54 – Close the valve on the gas cylinder and dis- charge the refrigerant until the gauge indicates 3 to 5 kg/cm - 53 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 55 – Discharge the refrigerant gradually; if it is dis- charged too suddenly, the refrigeration oil will also be discharged. - 54 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 56 (4) Disconnect the charge hose from the vacuum pump. – Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted, replenish as needed. - 55 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Gas Charging

    1 minute and then repeat the procedure (pumping down-pin). - 56 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 58: Cycle Parts

    2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 57 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 59: Electronic Parts

    • Voltage of Outdoor unit Micom No. 8, • Replace faulty parts OSC01B(8MHz) Voltage of Indoor unit Micom No. 43 and soldering (Indoor/Outdoor unit) condition - 58 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 60 ) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ). • Check the connecting circuit between PIN Rø2L(1K) - Cø1L(680PF) - MICOM PIN • Check Receiver Ass'y - 59 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 • Check the electrical wiring diagram of outdoor side. • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor. - 60 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 62: When Indoor Fan Does Not Operate

    Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F. (At that times, Defrost indicator is turned on) - 61 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 • Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver - 62 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied after connecting them. - 63 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 65 • The operation indicator blinks once Short between terminals (on for 0.5 second, off for 3 seconds) ) of PIPE-TH. • Continuous operation - 64 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 66: Outdoor Unit

    • The RED indicator of the Outdoor unit blinks 5 times after 2 minutes with applying the power. - 65 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 67 0~12 0~12 0~12 0~12 0~12 INDOOR DC/DC 34.3 28.8 27.3 24.5 0~12 0~12 0~12 0~12 0~12 OUTDOO R CN- DC/DC 34.7 29.1 24.8 - 66 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 68: Exploded View

    354210 35211B 268711B 352150 146811 147581 263230A 135313 249951 267110 152302 135314 152313 Option Part 135316 135315 152302 268711A - 67 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 69 567480 268711B 559010 W6640A 649950 135500A 447910 W4986A 135500B 552203A 554160A 567502 552203B W4986B 554160B 552117 430410 550140A 550140B - 68 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 H/P Models 552116 552202 W4986A 447910 561410 135500B 552203A 554160A 566000 552203B W4986B 554160B 567502 552117 430410 550140A 550140B - 69 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 September, 2009 P/NO : 3828A20390S...

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