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LG LS-K1820CL Manual

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Room Air Conditioner
SVC MANUAL(Exploded View)
MODEL :
LS-K1820CL/CM/HL/HM
LS-K1822CL/CM/HL
LS-K1860CL/CM/CN/HL/HM/HN
LS-K1861CL/HL/HM
LS-K1862CL/HL/HM
LS-K1865HL/HM/HN
LS-K1866HL
LS-K2460CL/CM/CN/HL/HM/HN
LS-K2462CL/HL
LS-K2420CL/CM/HL/HM
LS-K2422CL/CM/HL
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
LS-K2621
LS-K2661CL/HL/HM
LS-K2662CL/HL/HM
LS-K1863DL
LS-K1865EL
LS-K1866EL
LS-K2422AL

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Summary of Contents for LG LS-K1820CL

  • Page 1 Internal Use Only http://biz.lgservice.com Room Air Conditioner SVC MANUAL(Exploded View) MODEL : LS-K1820CL/CM/HL/HM LS-K2621 LS-K1822CL/CM/HL LS-K2661CL/HL/HM LS-K1860CL/CM/CN/HL/HM/HN LS-K2662CL/HL/HM LS-K1861CL/HL/HM LS-K1863DL LS-K1862CL/HL/HM LS-K1865EL LS-K1865HL/HM/HN LS-K1866EL LS-K1866HL LS-K2422AL LS-K2460CL/CM/CN/HL/HM/HN LS-K2462CL/HL LS-K2420CL/CM/HL/HM LS-K2422CL/CM/HL CAUTION Before Servicing the unit, read the safety precautions in General SVC manual.

  • Page 2: Table Of Contents

    Electronic Parts Troubleshooting Guide ................59 Electronic Control Device ..................... 65 Schematic Diagram ....................... 67 Exploded View ........................69 - 2 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 3: Functions

    • The louver can be set at the desired position or swing reached at 28°C. up and down automatically. - 3 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Remote Controller

    : 1, 2, 3, 4, 5, 6, 7, Off Timer Fan Operation Mode : Fan Operates without cooling or heating. Horizontal Airflow Direction Control Button(Option) Reset - 4 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Product Specifications

    Sleeping Operation Drain Hose Connecting Cable 1.5mm 1.5, 0.75mm 1.5, 0.75mm 1.5mm 1.5mm Power Cord 1.5mm 1.5mm 1.5mm 1.5mm 1.5mm - 5 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 Sleeping Operation Drain Hose Connecting Cable 1.5mm 1.5, 0.75mm 1.5, 0.75mm 1.5, 0.75mm Power Cord 1.5mm 1.5mm 1.5mm 1.5mm - 6 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 5/8"(15.88) Sleeping Operation Drain Hose Connecting Cable 2.5mm 2.5, 0.75mm 2.5mm 2.5, 0.75mm Power Cord 2.5mm 2.5mm 2.5mm 2.5mm - 7 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 5/8"(15.88) Sleeping Operation Drain Hose Connecting Cable 2.5mm 2.5, 0.75mm 2.5mm 2.5, 0.75mm Power Cord 2.5mm 2.5mm 2.5mm 2.5mm - 8 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 9 1/2"(12.7) Sleeping Operation Drain Hose 1.5, 0.75mm 2.5mm 2.5, 0.75mm Connecting Cable 1.5mm 1.5mm 2.5mm 2.5mm Power Cord 1.5mm - 9 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 5/8"(15.88) Sleeping Operation Drain Hose Connecting Cable 2.5mm 2.5, 0.75mm 1.5mm 1.5, 0.75mm Power Cord 2.5mm 2.5mm 1.5mm 1.5mm - 10 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 11 5/8"(15.88) Sleeping Operation Drain Hose Connecting Cable 2.5mm 2.5, 0.75mm 2.5mm 2.5, 0.75mm Power Cord 2.5mm 2.5mm 2.5mm 2.5mm - 11 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Dimensions

    Tubing hole cover Tubing hole cover Tubing hole cover Tubing hole cover Installation plate Installation plate MODEL ALL MODELS DIMENSION 1,080 - 12 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 (2) Outdoor Unit Gas side 3-way valve Liquid side 2-way valve MODEL ALL MODELS 74.5 - 13 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Refrigeration Cycle Diagram

    HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING 3-WAY VALVE ACCUMU VALVE LATOR (Heating Model Only) COOLING COMPRESSOR HEATING - 14 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 (2) Outdoor Unit Gas side 3-way valve Liquid side 2-way valve MODEL ALL MODELS 74.5 - 15 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Pipe Length And The Elevation

    * Oil trap should be installed per 5~7 meters. * Numerical value in "( )" is for Rotary Comp. model. - 16 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 17: Wiring Diagram

    1 ( L ) 2 ( N ) TERMINAL DISPLAY PCB ASM INDOOR WIRING DIAGRAM TO OUTDOOR UNIT 3854A90003J - 17 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 1 ( L ) 2 ( N ) TERMINAL DISPLAY PCB ASM INDOOR WIRING DIAGRAM TO OUTDOOR UNIT 3854A90003V - 18 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 19 T / B 2 TERMINAL 1 ( L ) 2 ( N ) BLOCK TO OUTDOOR UNIT OUTDOOR WIRING DIAGRAM 3854A90003K - 19 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 T / B 1 TERMINAL 1 ( L ) 2 ( N ) BLOCK TO OUTDOOR UNIT OUTDOOR WIRING DIAGRAM 3854A90003M - 20 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: Operation Details

    Intake Air Temp < 18° => 18°C • While in compressor off, the indoor fan repeats low airflow speed and pause. - 21 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 22 ? the present temperature of indoor pipe), according to which, whether to carry out defrost control or not is determined. - 22 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 • If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated. - 23 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 20°C ≤ Intake Air Temp => Intake Air Temp + 0.5°C Intake Air Temp < 20°C => 20°C - 24 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 • When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to the medium. - 25 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 • If no input by the remote controller or no switching of the slide switch within 7 hr after the appliance operates by the Auto Restarting operation, the appliance is forced to stop at the moment of 7-hr elapse. - 26 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 Cool) is input by the remote controller, the test operation is canceled and the appliance is operated according to the setting by the remote controller. - 27 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B) will be operated again. - 28 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 29: Display Function

    3 minutes delay of operating of the compressor, when the tempera- ture of the indoor pipe is over 7°C, the compressor and the outdoor fan is reoperated. - 29 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 30: Installation

    More than 70cm than 60cm • Oil trap should be installed every 5~7 meters. - 30 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 Drilling the hole through the wall for piping con- nections must be done safely. Left rear piping Right rear piping "D" "C" Hole center ø70mm - 31 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 32: 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 - 32 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 Do not connect the cable to the indoor unit. Make a small loop with the cable for easy con- nection later. Indoor unit tubing Flare nut Pipings - 33 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 34 Plastic bands Insulation material 2. Insert the piping, drain hose and the connecting cable into the piping hole. Connecting cable Drain pipe - 34 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 Tighten the flare nut with a wrench. Pipe Spanner (fixed) Vinyl tape(narrow) Flare nut Connecting cable Connection pipe Torque wrench Indoor unit tubing - 35 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 36: Outdoor Unit

    Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound). - 36 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 37: Connecting The Cable Between Indoor Unit And Outdoor Unit

    Main power source Conditioner Circuit Breaker Use a circuit break- er or time delay fuse. - 37 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 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. - 38 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Checking The Drainage And Forming The Pipings

    Tip of drain hose Less than dipped in water 50mm gap Trap Water Water Water Waving leakage leakage leakage Ditch - 39 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 40: Air Purging

    Usually, the cylinder is used in a vertical standing position. - 40 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 This completes air purging with a vacuum pump. The air conditioner is now ready to test run. Vacuum pump - 41 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 2. Measure the temperature of the intake and dis- unit. charge of air. - 42 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Operation

    Used to set the desired horizontal airflow direction. RESET BUTTON Used prior to resetting time or after replacing batteries. - 43 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 Used to set the desired horizontal airflow direction. RESET BUTTON Used prior to resetting time or after replacing batteries. - 44 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Disassembly Of The Parts (Indoor Unit)

    & step motor conductor with sensor holder, Motor, Evaporator & P.C.B. Motor Conductor Power Conductor Sensor Conductor Earth Conductor Step Motor Conductor - 45 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 4. To remove the Evaporator. • Remove 3 screws securing the evaporator(at the left 1EA, at the right 2EA). - 46 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 • Remove the left end of the cross-flow fan from the self-aligning bearing. - 47 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 48 & step motor conductor with sensor Power holder, Motor, Evaporator & P.C.B. Conductor Sensor Conductor Earth Conductor Step Motor Conductor - 48 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 4. To remove the Evaporator. • Remove 3 screws securing the evaporator(at the left 1EA, at the right 2EA). - 49 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 • Remove the left end of the cross-flow fan from the self-aligning bearing. - 50 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 51: 2-Way, 3-Way Valve

    Pressure check Open Open Open (Servicing) (with charging cylinder) Gas releasing Open Open Open (Servicing) (with charging cylinder) - 51 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 (5) Use torque wrench to tighten the service port nut and then recharge with the specified amount of to a torque of 1.8kg.cm. - 52 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 53: Pumping Down

    - Open the low-pressure valve on the charge set slightily to air purge from the charge hose. (5) Set the liquid side valve to the closed position. - 53 - Copyright ©2007 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 discharge the refrigerant until the gauge indicates 3 to 5 kg/cm - 54 - Copyright ©2007 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. - 55 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 56: Vacuum Pump

    (4) Disconnect the charge hose from the vacuum pump. - Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted, replenish as needed. - 56 - Copyright ©2007 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). - 57 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 58: Cycle Troubleshooting Guide

    2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 58 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 59: Electronic Parts Troubleshooting Guide

    • IC01A(KIA7036, Reset IC) • Voltage of Micom No. 2, • Replace faulty parts X01(8MHz) (DC +4.5V over) and Soldering condition. - 59 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 60: The Product Is Not Operate With The Remote Controller

    ) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ). • Check the connecting circuit between PIN Rø1L(1K) - Cø1L(680PF) - MICOM PIN • Check Receiver Ass'y - 60 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 61 • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor. • Check the "open" or "short" of conmecting wires between indoor and outdoor. - 61 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 62 The voltage of PIN NO 1(blue) and 3(yellow) of CN-MOTOR. About AC 180V over About AC 50V over TRIAC is not damaged TRIAC Check - 62 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 2°C at least. In heating Mode, the indoor fan operates in case the pipe temperature is higher than 28°C. - 63 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 64 • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor, 4 way. • Check the "open" or "short" of connecting wires between indoor and outdoor. - 64 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 65: Electronic Control Device

    6.8K SHORT LS-K2462CL/CM/CN 6871A10001P SHORT SHORT 6.8K SHORT LS-K2462HL/HM/HN 6871A10001Q 6.8K OPEN SHORT 6.8K SHORT LS-K1863DL 6871A10020E 6.8K OPEN - 65 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 66 (2) Display Ass'y Model P/No Remark 18K, 24K, 26K 6871A30009D LS-K1863DL 6871A30009R - 66 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 67: Schematic Diagram

    Schematic Diagram Cooling Only Series - 67 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 68 Heat Pump Series - 68 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 69: Exploded View

    Exploded View 1. Indoor Unit - 69 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 70 552111 546810 W0CZZB 435511 559010 649950 447910 Applied for heating model 561410 552203A 437210 554160 550140 552203B 435301 430411 - 70 - Copyright ©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 71 MARCH, 2008 P/NO : 3828A30033D...

This manual is also suitable for:

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