LG LS-K1820CL Manual Download | Manualshive

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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

• 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).

• Lift up the right side of the cross-flow fan and the

fan motor, separate the fan motor from the
cross-flow fan.

• Remove the left end of the cross-flow fan from

the self-aligning bearing.

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Summary of Contents for LS-K1820CL

Page 1: ...ervice personnel Internal Use Only http biz lgservice com 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 LS K2621 LS K2661CL HL HM LS K2662CL HL HM LS K1863DL LS K1865EL LS K1866EL LS K2422AL ...

Page 2: ...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 43 Disassembly of the parts Indoor Unit 45 2 way 3 way Valve 51 Cycle Troubleshooting Guide 58 Electronic Parts Troubleshooting Guide 59 Electronic Control Device 65 Schematic Diagram 67 Exploded View 69 ...

Page 3: ... med Heating speed The unit will be stopped after 1 2 3 4 5 6 7 hours The fan is switched to intermittent or irregular operation The fan speed is automatically switched from high to low speed The louver can be set at the desired position or swing up and down automatically Indoor Unit Operation ON OFF by Remote controller Sensing the Room Temperature Room temperature control Starting Current Contro...

Page 4: ...ling model only Heating model only TEMPERATURE LOW HIGH Cooling Operation Mode Heating Operation Mode Auto Operation Mode Fan Operation Mode Horizontal Airflow Direction Control Button Option Room Temperature Display Setting the Time or Timer PLASMA Option NEGATIVE ION Option ON OFF SET PLASMA CANCEL Fan Speed Selection Low Med High CHAOS High 39 C Low 11 C OFF ON OFF ON Cancel Sleep Mode Timer ON...

Page 5: ...1 950 8 7 8 7 53 53 9 2 2 86 20 62 1 080 x 314 x 181 870 x 655 x 320 12 59 1 270 YES NO NO NO OPTION YES YES YES YES 24hr ON OFF YES L C D Wireless 1 4 6 35 1 2 12 7 YES YES 1 5 0 75mm2 1 5mm2 18 000 4 536 5 274 2 5 1Ø 220V 60Hz 14 42 40 51 1 900 8 9 52 9 47 21 60 1 080 x 314 x 181 870 x 655 x 320 12 57 870 YES NO NO NO NO NO YES YES 24hr ON OFF YES L C D Wireless 1 4 6 35 5 8 15 88 YES YES 1 5mm2...

Page 6: ... 000 4 536 5 274 19 000 4 788 5 564 2 5 1Ø 220 240V 50Hz 12 42 39 53 1 950 1 950 8 7 8 7 53 53 9 2 2 86 20 62 1 080 x 314 x 181 870 x 655 x 320 12 59 1 270 YES YES YES YES NO YES YES YES YES 24hr ON OFF YES L C D Wireless 1 4 6 35 1 2 12 7 YES YES 1 5 0 75mm2 1 5mm2 18 000 4 536 5 274 19 000 4 788 5 564 2 5 1Ø 220 240V 50Hz 12 42 39 53 1 950 1 950 9 2 9 2 53 53 9 2 2 86 20 62 1 080 x 314 x 181 870...

Page 7: ...mm2 2 5mm2 24 000 6 048 7 032 24 000 6 040 7 032 2 5 1Ø 220 240V 50Hz 16 42 44 54 2 670 2 610 12 2 11 9 53 53 9 0 2 635 35 83 1 080 x 314 x 181 870 x 655 x 320 12 59 1 300 YES NO NO NO OPTION YES YES YES YES 24hr ON OFF YES L C D Wireless 3 8 9 52 5 8 15 88 YES YES 2 5 0 75mm2 2 5mm2 24 000 6 048 7 032 3 5 1Ø 220V 60Hz 15 5 48 42 3 54 3 2 100 9 8 61 10 5 35 78 1 080 x 314 x 181 870 x 655 x 320 12 ...

Page 8: ...YES YES 2 5mm2 2 5mm2 26 000 7 032 24 000 6 040 7 032 2 5 1Ø 220 240V 50Hz 16 42 44 54 2 670 2 610 12 2 11 9 53 53 9 0 2 635 35 83 1 080 x 314 x 181 870 x 655 x 320 12 59 1 300 YES YES YES YES YES YES YES YES 24hr ON OFF YES L C D Wireless 3 8 9 52 5 8 15 88 YES YES 2 5 0 75mm2 2 5mm2 26 000 7 032 3 5 1Ø 220V 60Hz 15 5 48 42 3 54 3 2 100 9 8 61 10 5 35 78 1 080 x 314 x 181 870 x 655 x 320 12 58 1 ...

Page 9: ... 7 YES YES 1 5mm2 1 5mm2 18 000 4 536 5 274 19 000 4 788 5 564 2 5 1Ø 220 240V 50Hz 12 42 39 53 1 950 1 950 8 7 8 7 53 53 9 2 2 86 20 62 1 080 x 314 x 181 870 x 655 x 320 12 59 1 270 YES NO NO YES YES NO YES YES YES YES 24hr ON OFF YES L C D Wireless 1 4 6 35 1 2 12 7 YES YES 1 5 0 75mm2 1 5mm2 24 000 6 048 7 032 2 5 1Ø 220 240V 50Hz 16 42 44 54 2 470 11 3 52 9 7 35 83 1 080 x 314 x 181 870 x 655 ...

Page 10: ... 88 YES YES 2 5mm2 2 5mm2 24 000 6 048 7 032 24 000 6 048 7 032 3 5 1Ø 220V 60Hz 16 48 44 3 55 3 2 525 2 525 12 0 12 0 70 70 9 5 2 78 35 78 1 080 x 314 x 181 870 x 655 x 320 12 65 1 610 YES NO NO YES YES YES YES YES 24hr ON OFF YES L C D Wireless 1 4 6 35 5 8 15 88 YES YES 2 5 0 75mm2 2 5mm2 18 000 4 536 5 274 2 5 1Ø 220V 60Hz 14 42 40 51 1 900 8 9 52 9 47 21 60 1 080 x 314 x 181 870 x 655 x 320 1...

Page 11: ...YES YES 2 5mm2 2 5mm2 26 000 7 032 24 000 6 040 7 032 2 5 1Ø 220 240V 50Hz 16 42 44 54 2 670 2 610 12 2 11 9 53 53 9 0 2 635 35 83 1 080 x 314 x 181 870 x 655 x 320 12 59 1 300 YES YES YES YES YES YES YES YES 24hr ON OFF YES L C D Wireless 3 8 9 52 5 8 15 88 YES YES 2 5 0 75mm2 2 5mm2 26 000 7 032 3 5 1Ø 220V 60Hz 15 5 48 42 3 54 3 2 100 9 8 61 10 5 35 78 1 080 x 314 x 181 870 x 655 x 320 12 58 1 ...

Page 12: ...Inc All right reserved Only for training and service purposes LGE Internal Use Only Tubing hole cover Tubing hole cover Installation plate D W H W H Tubing hole cover Tubing hole cover Installation plate D MODEL ALL MODELS DIMENSION W mm 1 080 H mm 314 D mm 181 ...

Page 13: ...purposes LGE Internal Use Only W L7 L6 L8 L9 D L1 L2 L3 L10 L11 L4 L5 H Gas side 3 way valve Liquid side 2 way valve 2 Outdoor Unit MODEL DIM W mm 870 H mm 655 D mm 320 L1 mm 370 L2 mm 340 L3 mm 25 L4 mm 630 L5 mm 25 L6 mm 546 L7 mm 162 L8 mm 162 L9 mm 54 L10 mm 74 5 L11 mm 79 ALL MODELS ...

Page 14: ...R UNIT OUTDOOR UNIT HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER HEAT EXCHANGE CONDENSER COMPRESSOR COMPRESSOR ACCUMU LATOR GAS SIDE GAS SIDE 3 WAY VALVE LIQUID SIDE LIQUID SIDE 2 WAY VALVE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE Heating Model only COOLING HEATING REVERSING VALVE Heating Model Only 1 Cooling Only Models 2 Cooling Heating Models ...

Page 15: ...purposes LGE Internal Use Only W L7 L6 L8 L9 D L1 L2 L3 L10 L11 L4 L5 H Gas side 3 way valve Liquid side 2 way valve 2 Outdoor Unit MODEL DIM W mm 870 H mm 655 D mm 320 L1 mm 370 L2 mm 340 L3 mm 25 L4 mm 630 L5 mm 25 L6 mm 546 L7 mm 162 L8 mm 162 L9 mm 54 L10 mm 74 5 L11 mm 79 ALL MODELS ...

Page 16: ...s of reliability Oil trap should be installed per 5 7 meters Numerical value in is for Rotary Comp model CAUTION Outdoor unit Indoor unit A B A Oil trap Outdoor unit Indoor unit B In case more than 5m 18K 60Hz 5 8 1 4 5 10 20 20 18K 50Hz 1 2 1 4 5 15 30 30 24K 60Hz 5 8 1 4 5 15 30 30 24K 50Hz 5 8 3 8 5 15 30 30 Pipe Size Capacity Btu h GAS LIQUID Additional Refrigerant g m Max Length A m Max Eleva...

Page 17: ...RATION AUTO RESTART REMOTE CONTROL MOTOR MAIN PCB ASM DISPLAY PCB ASM POWER TO OUTDOOR UNIT PILLAR TERMINAL BR BL GN YL BR BL GN YL 1 L 2 N 3 4 BL CN U D STEP MOTOR CN L R STEP MOTOR WH ION H V B GN GN YL OPTION 3854A90003J INDOOR WIRING DIAGRAM CN DISP1 CN U D FUSE AC250V T2A CN TH1 SSR SH CAPA BR GN YL BL BR YL OR BK CN TAB1 CN TAB2 CN 4WAY RY COMP ZNR RY 4WAY RY FAN CN MOTOR THERMISTOR FORCED O...

Page 18: ...ASM DISPLAY PCB ASM POWER TO OUTDOOR UNIT PILLAR TERMINAL BR BL GN YL BR BL GN YL 1 L 2 N 3 4 BL CN U D STEP MOTOR CN L R STEP MOTOR RD H V B A CL OPTION BK BK BK BK BK BK LIMIT S W 3854A90003V INDOOR WIRING DIAGRAM CN DISP1 CN U D FUSE AC250V T2A CN TH1 SSR SH CAPA BR GN YL BL BR YL OR BK CN TAB1 CN TAB2 CN 4WAY RY COMP ZNR RY 4WAY RY FAN CN MOTOR THERMISTOR FORCED OPERATION AUTO RESTART REMOTE C...

Page 19: ...MINAL BLOCK 3854AR2735F BR OR BR BL BK YL GN YL GN YL GN YL 1 L 2 N 2 Outdoor Unit 1 LS K1820 1860 1861 1862 2420 2422 2460 2462 2621 2622 2661 2662CL CM CN CN LS K1863DL 2 LS K1820 1822 1865 1866 HL HM HN 3854A90003K OUTDOOR WIRING DIAGRAM TO OUTDOOR UNIT TERMINAL BLOCK CAPACITOR PTC BR BL RD BK GN YL GN YL BR BL RD BK GN YL 1 L 2 N 3 4 COMP FAN MOTOR BR H C F R S C RD T B 1 BR OR BK RD YL BK YL ...

Page 20: ...l Use Only 3 LS K1860 1861 1862 2420 2460 2621 2661HL HM HN 3854A90003M OUTDOOR WIRING DIAGRAM TO OUTDOOR UNIT TERMINAL BLOCK CAPACITOR PTC BR BL RD BK GN YL GN YL BR BL RD BK GN YL 1 L 2 N 3 4 COMP FAN MOTOR BR H C F R S C RD RD BR T B 3 T B 4 HEATER RD T B 1 BR OR BK RD BK RD YL BK YL T B 2 REVERSING VALVE ...

Page 21: ...er cancel or appliance operation pause Timer Indicator On while in timer mode on off off when timer mode is completed or canceled Defrost Indicator Off except when hot start during heating mode operation or while in defrost control Cooling Mode Operation When the intake air temperature reaches 0 5 CC below the setting temp the compressor and the outdoor fan stop When it reaches 0 5 C above the set...

Page 22: ...y order while in heating mode operation 1st priority Defrost control is carried out according to the indoor pipe temp 60 min later since heating mode operation started 2nd priority The temp differences between the indoor pipe temp and the intake air temp 25 min later T1 and 60 min later T2 since heating mode operation started are measured then defrost control is carried out according to the differ...

Page 23: ...he compressor is turned on Compressor ON Temp Setting Temp 0 5 C Compressor OFF Temp Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 26 C Intake Air Temp 25 C 24 C Intake Air Temp 26 C Intake Air Temp 1 C 22 C Intake Air Temp 24 C Intake Air Temp 0 5 C 18 C Intake Air Temp 22 C Intake Air Te...

Page 24: ...ng temp the compressor is turned on Compressor ON Temp Setting Temp 0 5 C Compressor OFF Temp Setting Temp 0 5 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the intake air temp at that time 26 C Intake Air Temp 25 C 24 C Intake Air Temp 26 C Intake Air Temp 1 C 22 C Intake Air Temp 24 C Intake Air Temp 0 5 C 18 C Intake Air Temp 22 C Inta...

Page 25: ...ause continues Off Timer On Timer Operation When the set time is reached after the on off time is input by the remote controller the on off timer operation is carried out according to the set time Off Timer Operation Simple LCD Remote Controller When the set time is reached after 1 2 3 4 5 6 7 0 cancel hr is input by the remote controller while in appli ance operation the operation of the applianc...

Page 26: ...g dehumidification ventilation the Jet Cool mode is operated In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority When the Jet Cool key is inpu...

Page 27: ...o the Auto Restarting position or the remote control position the forced operation is canceled and the appliance stops operating The forced operation is carried out in cooling mode with the setting temperature 22 C and the high speed of air flow In the forced operation mode the indoor fan is operated at low speed for around 15 sec and then the operation condition is set according to the intake air...

Page 28: ... sensor or the room temperature sensor is open or is shorted the error is indicated To indicate the error the operation LED or the cooling LED flashed at 3 sec interval When the error is cleared the LED stops flashing the operation or cooling LED is on While in appliance pause the error is not indicated Since the airflow quantity and speed are controlled by the adjustment of the vane angle using t...

Page 29: ...f the operation mode LED 0 5 sec ON 3 sec OFF Protection of the evaporator pipe from frosting If the temperature of the indoor pipe is below 0 C after 7 minutes from starting the compressor the compressor and outdoor fan is stopped and then after 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 Oper...

Page 30: ...place animals and plants in the path of the warm air Take the air conditioner weight into account and select a place where noise and vibration are min imum Select a place so that the warm air and noise from the air conditioner do not disturb neighbors Rooftop Installations If the outdoor unit is installed on a roof structure be sure to level the unit Ensure the roof structure and anchoring method ...

Page 31: ...g a level 2 Measure the wall and mark the centerline It is also important to use caution concerning the location of the installation plate routing of the wiring to power outlets is through the walls typically Drilling the hole through the wall for piping con nections must be done safely 5 7mm 0 2 0 3 Indoor WALL Outdoor Installation Plate Marking off line Thread Weight Type A screw D C Right rear ...

Page 32: ...rrs into the tubing 3 Putting nut on Remove flare nuts attached to indoor and out door unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work Copper pipe 90 Slanted Uneven Rough Bar Copper pipe Clamp handle Red arrow mark Cone Yoke Handle Bar A Pipe Reamer Point down 4 Flaring work Carry out flaring work using flaring tool as shown below Firmly...

Page 33: ...ess the lower left and right sides of the unit against the installation plate until the hooks engage into their slots clicking sound 3 Tape the tubing drain hose and the connecting cable Be sure that the drain hose is located at the lowest side of the bundle Locating at the upper side can cause drain pan to overflow inside the unit 5 Connecting the pipings to the indoor unit and drain hose to drai...

Page 34: ...inyl tape narrow Connection pipe Connecting cable Vinyl tape wide Wrap with vinyl tape Indoor unit pipe Pipe Torque wrench Indoor unit tubing Spanner fixed Connection p Flare nut Vinyl tape narrow Adhesive Drain pipe Indoor unit drain hose When extending the drain hose at the indoor unit install the drain pipe Tighten the flare nut with a wrench 18K 24K 26K 1 2 5 5kg m 1 4 1 8kg m 5 8 6 6kg m 3 8 ...

Page 35: ...he center of the pipings and sufficiently tighten the flare nut by hand Tighten the flare nut with a wrench 7 Wrap the insulation material around the connect ing portion Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material Bind them together with vinyl tape so that there is no gap Plastic bands Insulation material Vinyl tape narrow Connection pipe Connectin...

Page 36: ...et the pipings and the drain hose to the back of the chassis with the tubing holder Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be engaged at the bottom of chassis 10 Indoor unit installation Remove the spacer Ensure that the hooks are properly seated on the installation plate by moving it left and right Drain hose Connecting cable Piping for passage th...

Page 37: ...ACK BLACK G Y RED RED G Y BLUE BROWN The power connecting cable connected to the indoor and outdoor unit should be complied with the following specifications Type H07RN F approved by HAR or SAA The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications Type H07RN F approved by HAR or SAA Cooling model Heat pump model Color of Wires Color of W...

Page 38: ...control cover 2 The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibra tions to which the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it could cause burn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to...

Page 39: ... piping and connecting cable from down to up Secure the taped piping along the exterior wall Form a trap to prevent water entering the room Fix the piping onto the wall by saddle or equiva lent Seal a small opening around the pipings with gum type sealer Trap Trap 1 Checking the drainage 1 To remove the front panel from the indoor unit remove the front panel from the indoor unit cabi net Set the a...

Page 40: ...est Connect the manifold valve with pressure gauges and dry nitrogen gas cylinder to this ser vice port with charge hoses Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P S I G Next test for leaks with liquid soap Lo Hi Indoor unit Outdoor unit Manifold valve Charge hose Nitrogen gas cylinder in vertical stand...

Page 41: ...on the gas side service port and fasten the flare nut secure ly with an adjustable wrench This process is very important to prevent leakage from the sys tem Replace the valve caps at both gas and liquid side service valves and fasten them tight This completes air purging with a vacuum pump The air conditioner is now ready to test run 1 Remove the caps from the 2 way and 3 way valves 2 Remove the s...

Page 42: ... than shown the system is most likely over charged and charge should be removed If the actual pres sure are lower than shown the system is most likely undercharged and charge should be added The air conditioner is now ready for use Bolt Tubing connection Outside ambient TEMP The pressure of the gas side service valve 35 C 95 F 4 5 5 5kg cm2 G 63 9 78 1 P S I G This is performed when the unit is to...

Page 43: ... CANCEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heating turns indoor fan on off ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature PLASMA OPTION Used to start or stop the plasma purification ...

Page 44: ...CEL BUTTONS Used to set the timer when the desired time is obtained and to cancel the Timer operation SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heating turns indoor fan on off ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature PLASMA OPTION Used to start or stop the plasma purification func...

Page 45: ... the up and down air discharge louver to open position horizontally by finger pressure Remove the securing screws To remove the Grille pull the lower left and right side of the grille toward you slightly tilted and lift it straight upward 1 To remove the sensor housing connect earth conductor step motor conductor with sensor holder Motor Evaporator P C B Screw 3EA Power Conductor Step Motor Conduc...

Page 46: ...rews Pull the control box out from the chassis careful ly 3 To remove the Discharge Grille Remove the securing screw Pressing the right side of the discharge grille downward slightly unhook the discharge grille Pull the discharge grille out from the chassis carefully 4 To remove the Evaporator Remove 3 screws securing the evaporator at the left 1EA at the right 2EA ...

Page 47: ... 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 Lift up the right side of the cross flow fan and the fan motor separate the fan motor from the cross flow fan Remove the left end of the cross flow fan from the self aligning bearing ...

Page 48: ...he Chassis LS K1862CL CM HL HM LS K2462CL CM HL HM LS K2464CL CM HL HM Remove the cover control from the grille Separate the black lead wire from the white connector Remove screws secured 3 EA Pull the grille out from the chassis carefully 1 To remove the sensor housing connect earth conductor step motor conductor with sensor holder Motor Evaporator P C B 48 Copyright 2007 LG Electronics Inc All r...

Page 49: ...ressing the right side of the discharge grille downward slightly unhook the discharge grille Pull the discharge grille out from the chassis carefully 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 Only for training and service purposes LGE Internal Use Only ...

Page 50: ...Loosen the screw securing the cross flow fan to the fan motor do not remove Lift up the right side of the cross flow fan and the fan motor separate the fan motor from the cross flow fan Remove the left end of the cross flow fan from the self aligning bearing 50 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 51: ...pen Closed with valve cap with valve cap with cap Pumping down Closed Open Open Transfering clockwise counter clockwise connected manifold gauge Evacuation Open Open Open Servicing with vacuum pump Gas charging Open Open Open Servicing with charging cylinder Pressure check Open Open Open Servicing with charging cylinder Gas releasing Open Open Open Servicing with charging cylinder 1 2 3 4 5 6 Valv...

Page 52: ...stem of the liquid side valve coun terclockwise approximately 90 wait 10 seconds and then set it to closed position Be sure to use a hexagonal wrench to operate the valve stem 3 Check for gas leakage Check the flare connections for gas leakage 4 Purge the air from the system Set the liquid side valve to the open position and remove the cap from the gas side valve s service port Using the hexagonal...

Page 53: ...ge hose to the service port 4 Air purging of the charge hose 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 6 Operates the air conditioner in cooling mode and stop it when the gauge indicates 1kg cm2g 7 Immediately set the 3 way valve to the closed posi tion Do this quickly so that the gauge ends up indic...

Page 54: ...es After purging the air use a torque wrench to tighten the flare nut on liquid side valve 4 Check for gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 3 to 5 kg cm2g 6 Disconnect the charge set and the gas cylinder and set the 2 way and 3 way valves to the open position B...

Page 55: ...he 3 way valve s port Leave the valve on the charge set closed Connect the charge hose to the service port 3 Open the valve Lo side on the charge set and dis charge the refrigerant until the gauge indicates 0 kg cm2G If there is no air in the refrigerant cycle the pres sure when the air conditioner is not running is high er than 1 kg cm2G discharge the refrigerant until the gauge indicates 0 5 to ...

Page 56: ...irm that the gauge needle has moved toward 76cmHg vacuum of 4 mmHg or less 3 Close the valve Lo side on the charge set turn off the vacuum pump and confirm that the gauge nee dle does not move approximately 5 minutes after turning off the 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 Lo Open Open V...

Page 57: ...nt it can be charged with a little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not sufficient wait approxi mately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be dis charged If the system has been char...

Page 58: ...e difference between intake and discharge air depends on room air humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower tem perature difference is larger 2 Check temperature and pressure of refrigeration cycle Notice 1 The suction pressure is usually 4 5 6 0 kg cm2 G Cooling at normal condition 2 The temperature ca...

Page 59: ... Fuse Pattern damage Varistor ZNR01J Check the connection housing for contacting Connector related to CN TAB1 CN TAB2 Connector related to CN MOTOR Connector contacting of Outdoor Fan Compressor Display PWB Ass y Check Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor and contacting condition of related connector PCB Board Operation Check Items Power Transformer Outdoor unit Input...

Page 60: ... Check the contact of CN DISPI connector 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 When operated in the Sleeping Mode the wind speed is set to the low speed by force Check DISP PWB Ass y Voltage between CN DISP1 DC 5V When the detect switch double key inside the remote controller door is fault it is impos...

Page 61: ...ion or are not engaged Compressor Outdoor Fan is stopped Check the related circuit of R02H 12 1K R01H 1 0K R04H 6 2K R03H 1 0K Micom No 3 4 Indoor unit Check the indoor temperature sensor is disconnected or not About 10kΩ at 25 C Turn off Main Power Check the electrical wiring diagram of outdoor side Check the abnormal condition for the component of Compressor Outdoor Fan Motor Check the open or s...

Page 62: ...Fuse AC250V T2A Turn ON Main Power 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 Check the pattern Check the TRIAC TRIAC Open Indoor Fan Motor never operate TRIAC short Indoor Fan Motor always operates in case of ON or OFF 4 When indoor Fan does not operate The voltage of PIN NO 1 blue and 3 yell...

Page 63: ...t 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 Check the soldering condition on PWB of CN U D Connector If there are no problems after above checks Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver 5 When Vertical Louver d...

Page 64: ...of check are as followings Check point Between Micom NO 62 and GND Between IC01M NO 14 and GND Comp ON DC 5V Below DC 1V Comp OFF DC 0V About DC 12V Check point Between Micom NO 54 and GND Between IC02M NO 16 and GND 4 way ON DC 5V Below DC 1V 4 way OFF DC 0V About DC 12V Check point Between Micom NO 53 and GND Between IC02M NO 15 and GND Fan ON DC 5V Below DC 1V Fan OFF DC 0V About DC 12V Comp Re...

Page 65: ...66HL HM HN 6871A10001J 91K 6 8K 3K 15K 10K 20K 11 LS K1865HL HM HN 6871A10055U 91K 91K 3K 3K 1K 3K 12 LS K2420CL CM CN 6871A10001R 6 8K OPEN SHORT 6 8K 6 8K 12K 13 LS K2420HL HM HN 6871A10001S 91K 5 1K 12K 5 1K 6 8K 6 8K 14 LS K2621CL CM CN 6871A10001V 6 8K OPEN SHORT 6 8K 6 8K 12K 15 LS K2621HL HM HN 6871A10001W 91K 5 1K 12K 5 1K 6 8K 6 8K 16 LS K2460CL CM CN 6871A10001K 6 8K OPEN SHORT 6 8K 2K S...

Page 66: ...6 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 Display Ass y No Model P No Remark 1 18K 24K 26K 6871A30009D 2 LS K1863DL 6871A30009R ...

Page 67: ...Schematic Diagram 67 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Cooling Only Series ...

Page 68: ... 68 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Heat Pump Series ...

Page 69: ... purposes LGE Internal Use Only Exploded View 159830 Applied for Plasma model Option 152302 249951 264110 267110 354210 733010 131410 135311 135314 135316 147581A 147581B 152313 359011 263230 266090 268711A 268711B W0CZZA 352150 35211B 346810 342800 Applied for Plasma model 1 Indoor Unit ...

Page 70: ...right reserved Only for training and service purposes LGE Internal Use Only 3 Outdoor Unit 552111 435511 649950 552203B 552203A 554160 550140 447910 561410 435512 559010 437210 435301 430411 546810 W0CZZB 554031 437212 Applied for heating model ...

Page 71: ...P NO 3828A30033D MARCH 2008 ...

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