Table of Contents
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WEBSITE http://biz.LGservice.com
E-MAIL
Room Air Conditioner
SERVICE MANUAL
CAUTION
-BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
-ONLY FOR AUTHORIZED SERVICE PERSONNEL.
MODEL : LS-K1863PL/RR
LS-K2462PL
LS-K1864PL
LS-K2463PL
(Applied to new Refrigerant R-410A)
http://www.LGEservice.com/techsup.html
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Table of Contents
Troubleshooting
Related Manuals for LG LS-K1863RR
Summary of Contents for LG LS-K1863RR
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Page 1: Room Air Conditioner
WEBSITE http://biz.LGservice.com E-MAIL http://www.LGEservice.com/techsup.html Room Air Conditioner SERVICE MANUAL CAUTION -BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. -ONLY FOR AUTHORIZED SERVICE PERSONNEL. MODEL : LS-K1863PL/RR LS-K2462PL LS-K1864PL LS-K2463PL (Applied to new Refrigerant R-410A) -
Page 2: Table Of Contents
Contents Functions ..........................3 Product Specifications ......................5 Dimensions ..........................6 Refrigeration Cycle Diagram ....................8 Wiring Diagram........................9 Operation Details ......................... 10 Display Function ........................17 Self-diagnosis Function....................... 17 Installation ..........................18 Operation ..........................31 Disassembly of the parts (Indoor Unit) ................32 2-way, 3-way Valve........................ -
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 References SPEC. AT 230V Model Name LS-K186_Series LS-K246_Series Item Unit Cooling Capacity Btu/h 18000 24000 Heating Capacity 19000 24000 Moisture Removal Power Source Ø, V, Hz 1Ø, 220-240V, 50Hz 1Ø, 220-240V, 50Hz Indoor Air Circulation /min Outdoor Indoor Noise Level dB (A)±3 Outdoor Cooling... -
Page 6: Dimensions
Dimensions (1) Indoor Unit Installation plate Tubing hole cover MODEL ALL MODELS Unit 1,080... - Page 7 (2) Outdoor Unit Gas side Liquid side MODEL ALL MODELS 74.5...
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Page 8: 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) VALVE CAPILLARY TUBE HEAT... -
Page 9: Wiring Diagram
Wiring Diagram (1) Indoor Unit AC PWB ASM DC PWB ASM THERMISTOR STEP TRIAC MOTOR MOTOR STEP CN-MOTOR MOTOR CN-TAB1 SH-CAPA RD AIR FUSE H.V. CLEAN 250V T2A PLASMA RY-COMP SAFETY S/W1 SAFETY S/W2 RY-4WAY CN-DISP RY-FAN SW(FORCE) T/BLOCK DISPLAY PWB ASM TO OUTDOOR UNIT INDOOR WIRING DIAGRAM 3854A20142A... -
Page 10: Operation Details
Operation Details 1. MAIN UNIT FUNCTION • DISPLAY 1) C/O Model 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 11 • While in compressor off, the indoor fan repeats low airflow speed and pause. • While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidifica- tion operation and 4-min compressor off repeat. Compressor ON Temp. Setting Temp+0.5°C Compressor OFF Temp.
- Page 12 Fuzzy Operation (C/O Model) • According to the temperature set 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. Compressor ON Temp Setting Temp + 0.5°C Compressor OFF Temp...
- Page 13 2) Fuzzy Operation for Dehumidification • 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 14 Off-Timer Operation • When the set time is reached after the time is input by the remote control, the appliance stops operating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. •...
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Page 15: Forced Operation
Jet Cool Mode Operation (C/O Model) • If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates. • In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation. •... - Page 16 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 control. 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 cool- ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting.
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Page 17: 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 18: Installation
Installation 1. Installation of indoor, Outdoor unit 1) Selection of the best location • Select a place so that the warm air and noise from the air conditioner do not disturb neighbors. 1. Indoor unit • Do not have any heat or steam near the unit. More than 60cm •... - Page 19 3) How to fix installation plate 4) Drill a hole in the wall The wall you select should be strong and solid enough • Drill the piping hole with a ø70mm hole core drill. Drill to prevent vibration the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.
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Page 20: Flaring Work And Connection Of Piping
2. Flaring Work and Connection of Piping 1) Flaring work 4. Flaring work • Firmly hold copper pipe in a die in the dimension Main cause for refrigerant leakage is due to defect in shown in the table above. the flaring work. Carry out correct flaring work using the following procedure. - Page 21 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 for lowest side of the bundle. Locating at the upper installation through the wall.
- Page 22 • Tighten the flare nut with a wrench. • Wrap the area which accommodates the rear piping housing section with vinyl tape. Open-end wrench (fixed) Indoor Connection unit pipe pipe Flare nut Vinyl tape Wrap with vinyl tape (wide) Connection pipe Wrench Connecting cable Indoor unit tubing...
- Page 23 3. Insert the connecting cable into the indoor unit. Outside diameter Torque • Don't connect the cable to the indoor unit. kg . m inch • Make a small loop with the cable for easy connection Ø6.35 later. Ø9.52 Ø12.7 4.
- Page 24 • Bundle the piping and drain hose together by wrap- Press the lower left and right sides of the unit against ping them with cloth tape over the range within which the installation plate until the hooks engage into their they fit into the rear piping housing section.
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Page 25: 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. • Connect the cable to the indoor unit by connecting the wires to the terminals on the control board in dividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. - Page 26 2) Connect the cable to the outdoor unit Outdoor Unit 1. Remove the control cover from the unit by loos- Terminal block ening the screw. Connect the wires to the terminals on the control Over 5mm board individually. 2. Secure the cable onto the control board with the Connecting cable cord clamp.
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Page 27: 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- • Set the air direction louvers up-and-down to the posi- tion of the indoor unit with insulation material and tion(horizontally) by hand. -
Page 28: Air Purging
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 service Air and moisture remaining in the refrigerant system valves. have undesirable effects as indicated below. Bubbles indicate a leak. - Page 29 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 coun- Liquid side terclockwise approximately 90°, wait for about 2~3 3-way valve sec, and close it.
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Page 30: Test Running
6. Test Running 1. Check that all tubing and wiring have been properly connected. Intake temperature 2. Check that the gas and liquid side service valves are fully open. Discharge air 1. Prepare remote control 1. Remove the battery cover by pulling it according to the Discharge arrow direction. -
Page 31: Operation
Operation Name and Function-Remote Control The remote control transmits the signals to the system. START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. Remote Control OPERATION MODE SELECTION BUTTON Used to select the operation mode. Signal transmitter ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature. -
Page 32: Disassembly Of The Parts (Indoor Unit)
Disassembly of the parts (Indoor unit) 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 33 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis careful- 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the dis- charge grille out from the chassis carefully. 4.
- Page 34 • 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 Motor Cover • Remove 2 securing screw. •...
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Page 35: 2-Way, 3-Way Valve
2-way, 3-way Valve 2-way Valve (Liquid 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 36 1. Air purging Required tools : hexagonal wrench, adjustable The air in the indoor unit and in the piping must be wrench, torque wrenches, wrench to purged. If air remains in the refrigeration pipes, it will hold the joints, and gas leak affect the compressor, reduce to cooling capacity, and detector.
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Page 37: 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) Operate the air conditioner at the cooling (1) Confirm that both the 2-way and 3-way valves cycle and stop it when the gauge indicates are set to the open position. - Page 38 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 (1) Confirm that both the 2-way valve and the 3- cylinder, and set the 2-way and 3-way valves way valve are set to the closed position.
- Page 39 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 (3) Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge (1) Confirm that both the 2-way and 3-way valves indicates 0 kg/cm are set to the back seat.
- Page 40 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 (4) Disconnect the charge hose from the vacuum pump. (1) Connect the vacuum pump to the charge set’s –...
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Page 41: 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 This is different from previous procedures. cylinder. - Page 42 5. Additional gas charging (Gas leakage) • When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suction pressure. • Use the graph or the equation below to get operating suction pressure according to indoor and outdoor temperature.
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Page 43: 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 44: 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 45 2. The product is not operate with the remote control. 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 46 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 47 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 48 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 49 6. When Heating does not operate Turn ON Main Power Operate “Heating Mode( )” by setting the desired temperature of the remote control is higher than one of the indoor temperature by 2°C at least. In heating Mode, the indoor fan operates in case the pipe temperature is higher than 28°C.
- Page 50 Turn off Main Power • Check the electrical wiring diagram of outdoor side. • 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. -50-...
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Page 51: Electronic Control Device
Electronic Control Device (1) MAIN P.W.B ASSEMBLY (AC PART) • TOP VIEW (1) MAIN P.W.B ASM (AC) • BOTTOM VIEW -51-... - Page 52 (2) MAIN P.W.B ASSEMBLY (DC PART) • TOP VIEW (2) MAIN P.W.B ASM (DC) • BOTTOM VIEW -52-...
- Page 53 (3) DISPLAY ASSEMBLY – 6871A20194 • TOP VIEW • BOTTOM VIEW – 6871A30009 • TOP VIEW • BOTTOM VIEW -53-...
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Page 54: Schematic Diagram
Schematic Diagram -54-... -
Page 55: Exploded View And Replacement Parts List
Exploded View and Replacement Parts List 1. Indoor Unit 135312 152313 135314 152302 733010 131410 359011 342800 159830 159901-1 159901-2 346810 268712 35211B 135516 354212 352150 263230 135311 146811-2 268714-1 146811-1 264110 266090 268714-2 267110 W0CZZ 249951 -55-... - Page 56 Parts List(indoor) PART No. LOCATION DESCRIPTION REMARKS LS-K1863PL LS-K2462PL LS-K1863RR LS-K1864PL LS-K2463PL 131410 CHASSIS ASSEMBLY 3141A20002H 3141A20002H 3141A20002H 3141A20002H 3141A20002H 135311 GRILLE ASSEMBLY,DISCHARGE(INDOOR) 3531A10124F 3531A10124F 3531A10076G 3531A10124F 3531A10124F 135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A20065X 3531A20065X 3531A10088M 3531A10104Q 3531A10104Q 135314 GRILLE ASSEMBLY, INLET SUB...
- Page 57 2. Outdoor unit 552102-1 552201 552111 552102-2 261704 552202 561410 552116 552560 552203-2 552203-1 553000 -57-...
- Page 58 Parts List(outdoor) PART No. LOCATION DESCRIPTION REMARKS LS-K1863PL LS-K2462PL LS-K1863RR LS-K1864PL LS-K2463PL 430411 BASE ASSEMBLY, WELD[OUTDOOR] 3041A30003F 3041A30003K 3041A30003F 3041A30003F 3041A20022E 435511 COVER ASSEMBLY, CONTROL(OUTDOOR) 3551A30018N 3551A10003Q 3551A30018N 3551A30061G 3551A10003Q 435512 COVER ASSEMBLY, TOP(OUTDOOR) 3H03266K 3H03266K 3H03266K 3H03266K 3H03266K 437210...
- Page 59 February , 2003 P/No.: 3828A20135E Printed in Korea...