LG LS-K1820CL Service Manual
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LG LS-K1820CL Service Manual

Room air conditioner
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Room Air Conditioner

SERVICE MANUAL

MODEL : LS-K1820CL/CM/CN/HL/HM/HN
LS-K1822CL/CM/CN/HL/HM/HN
LS-K1860CL/CM/CN/HL/HM/HN
LS-K1861CL/CM/CN/HL/HM/HN
LS-K1862CL/CM/CN/HL/HM/HN
LS-K1865CL/CM/CN/HL/HM/HN
LS-K1866CL/CM/CN/HL/HM/HN
LS-K2460CL/CM/CN/HL/HM/HN
LS-K2462CL/CM/CN/HL/HM/HN
LS-K2420CL/CM/CN/HL/HM/HN
LS-K2422CL/CM/CN/HL/HM/HN
LS-K2621CL/CM/CN/HL/HM/HN
LS-K2661CL/CM/CN/HL/HM/HN
LS-K2662CL/CM/CN/HL/HM/HN
LS-K1863DL

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Summary of Contents for LG LS-K1820CL

  • Page 1: Room Air Conditioner

    Room Air Conditioner SERVICE MANUAL MODEL : LS-K1820CL/CM/CN/HL/HM/HN LS-K1822CL/CM/CN/HL/HM/HN LS-K1860CL/CM/CN/HL/HM/HN LS-K1861CL/CM/CN/HL/HM/HN LS-K1862CL/CM/CN/HL/HM/HN LS-K1865CL/CM/CN/HL/HM/HN LS-K1866CL/CM/CN/HL/HM/HN LS-K2460CL/CM/CN/HL/HM/HN LS-K2462CL/CM/CN/HL/HM/HN LS-K2420CL/CM/CN/HL/HM/HN LS-K2422CL/CM/CN/HL/HM/HN LS-K2621CL/CM/CN/HL/HM/HN LS-K2661CL/CM/CN/HL/HM/HN LS-K2662CL/CM/CN/HL/HM/HN LS-K1863DL...

  • Page 2: Table Of Contents

    Contents Functions ..........................3 Product Specifications ......................5 Dimensions ..........................12 Refrigeration Cycle Diagram ....................14 Pipe Length and the Elevation .....................16 Wiring Diagram ........................17 Operation Details ........................21 Display Function ........................29 Self-diagnosis Function ......................29 Installation ..........................30 Operation ..........................

  • Page 3: Functions

    Functions Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control • Indoor fan is delayed for 5 sec at the starting. Time Delay Safety Control •...

  • Page 4: Remote Controller

    Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode.( Auto Operation Mode.( (Cooling (Heating Healthy Dehumidification Operation Mode.( Heating Operation Mode.( model only) model only) Fan Speed Selection (Low) (Med) (High) (CHAOS) Room, Temperature Display : (High:39°C Low:11°C) Temperature Setting HIGH TEMPERATURE Down to 18°C...

  • Page 5: Product Specifications

    Product Specifications Model Name LS-K1863DL K1860CL/CM/CN K1860HL/HM/HN K1820CL/CM/CN K1820HL/HM/HN Unit Item BTU/h(kcal/h) 18,000(4,536) 18,000(4,536) 18,000(4,536) 18,000(4,536) 18,000(4,536) Cooling Capacity 5,274 5,274 5,274 5,274 5,274 BTU/h(kcal/h) 19,000(4,788) 19,000(4,788) Heating Capacity 5,564 5,564 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz...
  • Page 6 Model Name Unit Item K1861CL/CM/CN K1861HL/HM/HN K1865HL/HM/HN K1866HL/HM/HN BTU/h(kcal/h) 18,000(4,536) 18,000(4,536) 18,000(4,536) 18,000(4,536) Cooling Capacity 5,274 5,274 5,274 5,274 BTU/h(kcal/h) 19,000(4,788) 19,000(4,788) 19,000(4,788) Heating Capacity 5,564 5,564 5,564 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz Indoor...
  • Page 7 Model Name K2460CL/CM/CN K2460HL/HM/HN K2420CL/CM/CN K2420HL/HM/HN Unit Item BTU/h(kcal/h) 24,000(6,048) 24,000(6,048) 24,000(6,048) 24,000(6,048) Cooling Capacity 7,032 7,032 7,032 7,032 BTU/h(kcal/h) 24,000(6,040) 24,000(6,048) Heating Capacity 7,032 7,032 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz Indoor 15.5...
  • Page 8 Model Name K2661CL/CM/CN K2661HL/HM/HN K2621CL/CM/CN K2621HL/HM/HN Unit Item BTU/h(kcal/h) 26,000 26,000 26,000 26,000 Cooling Capacity 7,032 7,032 7,032 7,032 BTU/h(kcal/h) 24,000(6,040) 24,000(6,048) Heating Capacity 7,032 7,032 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz Indoor 15.5...
  • Page 9 Model Name K1862CL/CM/CN K1862HL/HM/HN K2462CL/CM/CN K2462HL/HM/CN Unit Item Cooling Capacity BTU/h(kcal/h) 18,000(4,536) 24,000(6,048) 24,000(6,048) 18,000(4,536) 5,274 7,032 7,032 5,274 19,000(4,788) 24,000(6,048) Heating Capacity BTU/h(kcal/h) 5,564 7,032 Moisture Removal 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz Indoor Air Circulation...
  • Page 10 Model Name K2422CL/CM/CN K2422HL/HM/HN K1822CL/CM/CN K1822HL/HM/HN Unit Item BTU/h(kcal/h) 24,000(6,048) 24,000(6,048) 18,000(4,536) 18,000(4,536) Cooling Capacity 7,032 7,032 5,274 5,274 BTU/h(kcal/h) 24,000(6,048) 19,000(4,788) Heating Capacity 7,032 5,564 Moisture Removal Power Source Ø, V, Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz Indoor 15.5...
  • Page 11 Model Name K2662CL/CM/CN K2662HL/HM/HN K2622CL/CM/CN K2622HL/HM/HN Unit Item BTU/h(kcal/h) 26,000 26,000 26,000 26,000 Cooling Capacity 7,032 7,032 7,032 7,032 BTU/h(kcal/h) 24,000(6,040) 24,000(6,048) Heating Capacity 7,032 7,032 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz 1Ø, 220V, 60Hz 1Ø, 220V, 60Hz Indoor 15.5...

  • Page 12: Dimensions

    Dimensions (1) Indoor Unit Tubing hole cover Tubing hole cover Tubing hole cover Tubing hole cover Installation plate Installation plate MODEL ALL MODELS DIMENSION 1,080 - 12 -...
  • Page 13 (2) Outdoor Unit Gas side 3-way valve Liquid side 2-way valve MODEL ALL MODELS 74.5 - 13 -...

  • Page 14: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram (1) Cooling Only Models INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR (2) Cooling & Heating Models INDOOR UNIT OUTDOOR UNIT CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILLARY TUBE HEAT...
  • Page 15 (2) Outdoor Unit Gas side 3-way valve Liquid side 2-way valve MODEL ALL MODELS 74.5 - 15 -...

  • Page 16: Pipe Length And The Elevation

    Pipe length and the elevation Pipe Size Standard Max. Max. Additional Capacity Length Elevation Length Refrigerant (Btu/h) LIQUID B (m) A (m) (g/m) 18K(60Hz) 5/8" 1/4" 18K(50Hz) 1/2" 1/4" 24K(60Hz) 5/8" 1/4" 24K(50Hz) 5/8" 3/8" Outdoor unit Outdoor unit Oil trap Indoor unit Indoor unit In case more than 5m...

  • Page 17: Wiring Diagram

    Wiring Diagram (1) Indoor Unit 1. LS-K1820/1860/1861/2420/2460/2621/2661CL/CM/CN, LS-K1863DL POWER FORCED MAIN PCB OPERATION AUTO RESTART REMOTE CONTROL MOTOR THERMISTOR STEP SH-CAPA. MOTOR STEP MOTOR H.V.B (GN/YL) OPTION RY-COMP. FUSE AC250V/T2A CN-DISP1 PILLAR 1 ( L ) 2 ( N ) TERMINAL DISPLAY PCB ASM INDOOR WIRING DIAGRAM...
  • Page 18 3. LS-K1822/1862/2422/2462/2662CL/CM/CN POWER FORCED MAIN PCB OPERATION AUTO RESTART REMOTE CONTROL MOTOR THERMISTOR STEP SH-CAPA. MOTOR STEP MOTOR H.V.B A/CL BK BK RY-COMP. FUSE AC250V/T2A LIMIT CN-DISP1 OPTION PILLAR 1 ( L ) 2 ( N ) TERMINAL DISPLAY PCB ASM INDOOR WIRING DIAGRAM TO OUTDOOR UNIT 3854A90003U...
  • Page 19 (2) Outdoor Unit 1. LS-K1820/1860/1861/1862/2420/2422/2460/2462/2621/2622/2661/2662CL/CM/CN/CN LS-K1863DL OPTION BR(OR) COMP. CAPACITOR TERMINAL 1(L) 2(N) BLOCK MOTOR BR BL TO INDOOR UNIT OUTDOOR WIRING DIAGRAM 3854AR2735F 2. LS-K1820/1822/1865/1866/HL/HM/HN GN/YL COMP. MOTOR CAPACITOR BR(OR) T / B 1 (RD) REVERSING VALVE T / B 2 TERMINAL 1 ( L ) 2 ( N ) BLOCK...

  • Page 20: Outdoor Wiring Diagram

    3. LS-K1860/1861/1862/2420/2460/2621/2661HL/HM/HN GN/YL COMP. MOTOR CAPACITOR BR(OR) BK(RD) T/B 3 HEATER REVERSING VALVE BK(RD) T/B 4 T / B 2 T / B 1 TERMINAL 1 ( L ) 2 ( N ) BLOCK TO OUTDOOR UNIT OUTDOOR WIRING DIAGRAM 3854A90003M - 20 -...

  • Page 21: Operation Details

    Operation Details 1. MAIN UNIT FUNCTION • DISPLAY 1) C/O Model (high quality LCD remote controller supplied) Operation Indicator • On while in appliance operation, off while in appliance pause • Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on) Sleep Timer Indicator •...
  • Page 22 • While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat Compressor ON Temp. => Setting Temp+0.5°C Compressor OFF Temp. => Setting Temp-0.5°C • In 10-min dehumidification operation, the indoor fan operates with the low airflow speed. Heating Mode Operation •...
  • Page 23 2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that moment, the defrost control time is determined. 3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry- ing out defrost control.
  • Page 24 1) Fuzzy Operation for Cooling • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
  • Page 25 • When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule. •...
  • Page 26 Chaos Swing Mode • By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are fixed to the desired direction. • While in Chaos Swing mode, the angles of cooling and heating cycle operations are different. Chaos Natural Wind Mode •...
  • Page 27 Forced Operation ( C/O Model) • To operate the appliance by force in case that the remote controller is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions. •...
  • Page 28 Remote Control Operation Mode • When the remote control is selected by the slide switch on the main unit, the appliance operates according to the input by the remote controller. Protection of the evaporator pipe from frosting • If the indoor pipe temp is below 0°C in 7 min after the compressor operates without any pause while in cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evapora- tor pipe from frosting.

  • Page 29: Display Function

    Display Function 1. Heating Model 2. Cooling Model Operation Indicator Operation Indicator • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan Sleep Timer Indicator Sleep Timer Indicator • Sleep Mode • Sleep Mode Timer Indicator Timer Indicator • Timer Mode •...

  • Page 30: Installation

    Installation Read completely, then follow step by step. 1. Installation of Indoor, Outdoor unit Rooftop Installations: 1) Select the best location If the outdoor unit is installed on a roof structure, 1. Indoor unit be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit Do not have any heat or steam near the unit.
  • Page 31 3) How to fix installation plate 4) Drill a hole in the wall The wall you select should be strong and solid enough to prevent Drill the piping hole with a ø70mm hole core drill. vibration Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.

  • Page 32: Flaring Work And Connection Of Piping

    2. Flaring Work and Connection of Piping 1) Flaring work 4. Flaring work Carry out flaring work using flaring tool as shown Main cause for gas leakage is due to defect in flar- below. ing work. Carry out correct flaring work in the follow- ing procedure.
  • Page 33 2) Connection of piping-Indoor 3. Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at the Preparing the indoor unit's piping and drain hose lowest side of the bundle. Locating at the upper for installation through the wall.
  • Page 34 Tighten the flare nut with a wrench. Wrap the area which accommodates the rear piping housing section with vinyl tape. Spanner (fixed) Indoor Connection unit pipe pipe Vinyl tape Wrap with vinyl tape Flare nut (wide) Connection p Torque wrench Connecting cable Indoor unit tubing Pipe...
  • Page 35 3. Insert the connecting cable into the indoor unit. Pipe Size[Torque] Capacity Don't connect the cable to the indoor unit. (Btu/h) LIQUID Make a small loop with the cable for easy con- 1/2"[5.5kg . m] 1/4"[1.8kg . m] nection later. 18K, 24K, 26K 5/8"[6.6kg .

  • Page 36: Outdoor Unit

    Bundle the piping and drain hose together by 3) Connection of the pipes-Outdoor wrapping them with cloth tape over the range 1. Align the center of the pipings and sufficiently within which they fit into the rear piping housing tighten the flare nut by hand. section.

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

    3. Connecting the Cable Between Indoor Unit and Outdoor Unit 1) Connect the cable to the Indoor unit. CAUTION Connect the cable to the indoor unit by connect- The power cord connected to the indoor unit should ing the wires to the terminals on the control be complied with the following specifications board individually according to the outdoor unit (Type H05VV-F approved by HAR or SAA).
  • Page 38 2) Connect the cable to the outdoor unit Outdoor Unit 1. Remove the control cover from the unit by loosening the screw. Connect the wires to the terminals on the Terminal block control board individually. Over 5mm 2. Secure the cable onto the control board with the cord clamp.

  • Page 39: Checking The Drainage And Forming The Pipings

    4. Checking the Drainage and Forming the Pipings 1) Checking the drainage 2) Form the piping 1. To remove the front panel from the indoor unit, 1. Form the piping by wrapping the connecting por- remove the front panel from the indoor unit cabi- tion of the indoor unit with insulation material and net.
  • Page 40 5. Air Purging 1) Air purging Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side Air and moisture remaining in the refrigerant system service valves. have undesirable effects as indicated below. Bubbles indicate a leak.
  • Page 41 Soap water method Gas side (1) Remove the caps from the 2-way and 3-way valves. (2) Remove the service-port cap from the 3-way valve. (3) To open the 2-way valve turn the valve stem counter- clockwise approximately 90°, wait for about 2~3 sec, and close it.
  • Page 42 1. Check that all tubing and wiring have been prop- 3. Ensure the difference between the intake temper- erly connected. ature and the discharge is more than 8°C 2. Check that the gas and liquid side service valves (Cooling) or reversely (Heating). are fully open.

  • Page 43: Operation

    Operation (1) Name and Function-Remote Control (Cooling Models) Remote Controller ON/OFF TIMER BUTTONS Signal transmitter. Used to set the time of starting and stopping operation. Transmits the signals to the room air conditioner. TIME SETTING BUTTONS Used to adjust the time. Signal transmitter TIMER SET/CANCEL BUTTONS Used to set the timer when the desired time is obtained...
  • Page 44 (2) Name and Function-Remote Control (Heat Pump Models) Remote Controller ON/OFF TIMER BUTTONS Signal transmitter. Used to set the time of starting and stopping operation. Transmits the signals to the room air conditioner. TIME SETTING BUTTONS Used to adjust the time. Signal transmitter TIMER SET/CANCEL BUTTONS Used to set the timer when the desired time is obtained...

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

    Disassembly of the parts (Indoor unit) LS-K1820/1860/1861/1865/2420/2460/2661CL/CM/CN/HL/HM/HN Warning : Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure.
  • Page 46 2. To remove the Control Box. • Remove 2 securing screws. • Pull the control box out from the chassis careful- 3. To remove the Discharge Grille. • Remove the securing screw. • Pressing the right side of the discharge grille downward slightly, unhook the discharge grille.
  • Page 47 • 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. 5. To remove the Cross-Flow Fan • Loosen the screw securing the cross-flow fan to the fan motor (do not remove).
  • Page 48 LS-K1822/1862/1866/2422/2462/2662CL/CM/CN/HL/HM/HN Warning : Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”. To remove the Grille from the Chassis(LS-K2463CL/CM/HL/HM) • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure. •...
  • Page 49 2. To remove the Control Box. • Remove 2 securing screws. • Pull the control box out from the chassis carefully. 3. To remove the Discharge Grille. • Remove the securing screw. • Pressing the right side of the discharge grille downward slightly, unhook the discharge grille.
  • Page 50 • 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. 5. To remove the Cross-Flow Fan • Loosen the screw securing the cross-flow fan to the fan motor (do not remove).

  • Page 51: 2-Way, 3-Way Valve

    2-way, 3-way Valve 2-way Valve (Liguid Side) 3-way Valve (Gas Side) Valve cap Hexagonal wrench (4mm) Open position Flare nut Flare nut Closed position Open position Closed position piping piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works Shaft position...
  • Page 52 1. Air purging The air in the indoor unit and in the piping must be Required tools: Hexagonal wrench, adjustable purged. If air remains in the refrigeration pipes, it will wrench, torque wrenches, wrench to affect the compressor, reduce to cooling capacity, hold the joints, and gas leak detector.

  • Page 53: Pumping Down

    2. Pumping down Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operates the air conditioner in cooling mode and (1) Confirm that both liquid side and gas side valves stop it when the gauge indicates 1kg/cm are set to the open position.
  • Page 54 1) Re-air purging (Re-installation) Liquid side Indoor unit Closed Outdoor unit 2-Way valve Gas side Closed 3-Way valve Gas cylinder OPEN CLOSE • Procedure (6) Disconnect the charge set and the gas cylinder, (1) Confirm that both the liquid side valve and the gas and set the 2-way and 3-way valves to the open side valve are set to the closed position.
  • Page 55 2) Balance refrigerant of the 2-way, 3-way valves (Gas leakage) Liquid side Indoor unit Outdoor unit 2-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (1) Confirm that both the liquid side and gas side (3) Open the valve (Lo side) on the charge set and dis- valves are set to the back seat.
  • Page 56 3. Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 2-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (1) Connect the vacuum pump to the center hose of (3) Close the valve (Lo side) on the charge set, turn off charge set center hose the vacuum pump, and confirm that the gauge nee- dle does not move (approximately 5 minutes after...

  • Page 57: Gas Charging

    4. Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 2-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure (1) Connect the charge hose to the charging cylinder. This is different from previous procedures. - Connect the charge hose which you disconnected Because you are charging with liquid refriger- from the vacuum pump to the valve at the bottom...

  • Page 58: Cycle Troubleshooting Guide

    Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference : approx. 0°C • All amount of refrigerant leaked Current : less than 80% of out. Check refrigeration cycle. rated current Temp.

  • Page 59: Electronic Parts Troubleshooting Guide

    Electronic Parts Troubleshooting Guide 1. Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 10 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK.
  • Page 60 2. The product is not operate with the remote controller. Turn on Main Power While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller.
  • Page 61 3. Compressor/Outdoor Fan are unable to drive. Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C at least. When in Air Circulation Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

  • Page 62: When Indoor Fan Does Not Operate

    4. When indoor Fan does not operate. Turn off Main power Check the connection of CN-MOTOR Check the Fan Motor Check the Fuse(AC250V/T2A) Check the related circuit of indoor Fan Motor. • The pin NO 63 of Micom, and the part for driving TRIAC(the input and output signal of IC01M, PIN NO 2, 15) •...
  • Page 63 5. When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D Connector •...
  • Page 64 Check the connector of intake and pipe sensor(thermistors) • Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K), R03H(1.0K), Micom(No. 3, 4). • Check the indoor room temperature is disconnected or not (about 10KΩ/at 25°C). • Check the indoor pipe temperature is disconnected or not (about 5KΩ/at 25°C).

  • Page 65: Electronic Control Device

    Electronic Control Device (1) MAIN P.W.B ASM P.W.B ASS'Y SVC PART LIST OPTIONAL FUNCTION MODEL P/NO OR1H OR2H OR3H OR4H OR5H OR6H LS-K1820CL/CM/CN 6871A10001T 6.8K OPEN LS-K1820HL/HM/HN 6871A10001U 5.1K LS-K1822CL/CM/CN 6871A10001X 6.8K OPEN LS-K1822HL/HM/HN 6871A10001Y 5.1K LS-K1860CL/CM/CN 6871A10001D 6.8K OPEN...
  • Page 66 (2) Display Ass'y Model P/No Remark 18K, 24K, 26K 6871A30009D LS-K1863DL 6871A30009R - 66 -...

  • Page 67: Schematic Diagram

    Schematic Diagram Cooling Only Series - 67 -...
  • Page 68 Heat Pump Series - 68 -...

  • Page 69: Exploded View & Replacement Parts List

    Exploded View & Replacement Parts List 1. Indoor Unit - 69 -...
  • Page 70 Parts List(Indoor) PART NO. LOCATION PARTS NAME LS-K1820 LS-K1860 LS-K1861 LS-K2420 LS-K2460 LS-K2661 CL/CM/CN CL/CM/CN CL/CM/CN CL/CM/CN CL/CM/CN CL/CM/CN 131410 CHASSIS ASSY 3141A20002B 3141A20002D 3141A20002A 3141A20002B 3141A20002D 3141A20002A 135311 GRILLE ASSY, DISCHARGE 3531A10008C 3531A10008C 3531A10008A 3531A10008C 3531A10008C 3531A10008A 135312 GRILLE ASSY, FRONT 3531A10007D 3531A10007D 3531A10007D...
  • Page 71 Parts List(Indoor) PART NO. LOCATION PARTS NAME LS-K1820 LS-K1860/1865 LS-K1861 LS-K2420 LS-K2460 LS-K2661 LS-1865EL HL/HM/HN HL/HM/HN HL/HM/HN HL/HM/HN HL/HM/HN HL/HM/HN 131410 CHASSIS ASSY 3141A20002B 3141A20002D 3141A20002D 3141A20002A 3141A20002B 3141A20002A 3141A20002A 135311 GRILLE ASSY, DISCHARGE 3531A10008E 3531A10008C 3531A10008C 3531A10008A 3531A10008E 3531A10008C 3531A10008A 135312 GRILLE ASSY, FRONT 3531A10007Q 3531A20045D 3531A20045D 3531A10007C 3531A10007R 3531A10007C 3531A10007C 135314 GRILLE ASSY, INLET SUB...
  • Page 72 Parts List(Indoor) PART NO. LOCATION PARTS NAME LS-K1822 LS-K1862 LS-K2422 LS-K2462 LS-K2662 LS-K1863DL CL/CM/CN CL/CM/CN CL/CM/CN CL/CM/CN CL/CM/CN 131410 CHASSIS ASSY 3141A20002F 3141A20002F 3141A20002F 3141A20002F 3141A20002F 3141A20002F 135311 GRILLE ASSY, DISCHARGE 3531A10008L 3531A10008J 3531A10008L 3531A10008H 3531A10008J 3531A10008H 135312 GRILLE ASSY, FRONT 3531A20045M 3531A20045M 3531A20045M...
  • Page 73 Parts List(Indoor) PART NO. LOCATION PARTS NAME LS-K1822 LS-K1862 LS-K2422 LS-K2462 LS-K2662 LS-K1866EL HL/HM/HN HL/HM/HN HL/HM/HN HL/HM/HN HL/HM/HN 131410 CHASSIS ASSY 3141A20002F 3141A20002H 3141A20002H 3141A20002F 3141A20002H 3141A20002F 135311 GRILLE ASSY, DISCHARGE 3531A10008L 3531A10008H 3531A10008H 3531A10008L 3531A10008H 3531A10008J 135312 GRILLE ASSY, FRONT 3531A20045L 3531A20045F 3531A20045F...
  • Page 74 3. Outdoor Unit 554031 437212 435512 552102-1 552201 552111 552102-2 546810 W0CZZ-2 435511 559010 649950 447910 552202 561410 552116 552203-2 552560 437210 554160 550140 552203-1 430411 - 74 -...
  • Page 75 Parts List(Outdoor) PART NO. LOCATION PARTS NAME LS-K1820CL/CM/CN LS-K1860CL/CM/CN LS-K2420CL/CM/CN LS-K2460CL/CM/CN LS-K2661CL/CM/CN LS-K1861CL/CM/CN LS-K2422AL LS-K1822CL/CM/CN LS-K1862CL/CM/CN LS-K2422CL/CM/CN LS-K2462CL/CM/CN LS-K2662CL/CM/CN 430410 BASE ASSY, WELD(OUTDOOR) 3041A20022E 3041A20022E 3041A20022E 3041A20022E 3041A20022E 3041A20022E 3041A20022E 435511 COVER ASSY, CONTROL(OUTDOOR) 3551A30007G 3551A30007G 3551A30007G 3551A30007G 3551A30007G 3551A30007G 3551A30007G...
  • Page 76 Parts List(Outdoor) PART NO. LOCATION PARTS NAME LS-K1820CL/CM/CN LS-K1860CL/CM/CN LS-K2420CL/CM/CN LS-K2460CL/CM/CN LS-K2661CL/CM/CN LS-K1861CL/CM/CN LS-K2422AL LS-K1822CL/CM/CN LS-K1862CL/CM/CN LS-K2462CL/CM/CN LS-K2462CL/CM/CN LS-K2662CL/CM/CN 430411 BASE ASSY WELD(OUTDOOR) 3041A30003F 3041A30003K 3041A30003K 3041A30003K 3041A30003K 3041A30003U 3041A30003U 435511 COVER ASSY, CONTROL(OUTDOOR) 3551A30007N 3551A30007S 3551A30007S 3551A30007S 3551A30007S 3551A30007N 3551A30007N...
  • Page 77 Parts List(Outdoor) PART NO. LOCATION REMARKS PARTS NAME LS-K1863DL 430411 BASE ASSEMBLY,WELD[OUTDOOR] 3041A20022E 435511 COVER ASSY,CONTROL(OUTDOOR) 3551A30007G 435512 COVER ASSEMBLY,TOP(OUTDOOR) 3H03266K 437210 PANEL ASSEMBLY,FRONT(OUTDOOR) 3721A20005H 437212 PANEL ASSY,REAR 3720AP0003D 447910 BARRIER ASSEMBLY,OUTDOOR 2H02110M 546810 MOTOR ASSEMBLY,OUTDOOR 4681A20013A 550140 ISOLATOR,COMP 4H00637A 552102 TUBE,CAPILLARY BEND 5210A30216H...
  • Page 78 Memo - 78 -...
  • Page 79 March, 2003 P/NO.: 3828A30033D Printed in Korea...

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