LG L2-C243AL1 Svc Manual Download Page 54 | Manualshive

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

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Summary of Contents for L2-C243AL1

Page 1: ... View 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 MODEL LM 1830C2L M N LM 1830H2L M N LM 2430C2L M N LM 2430H2L M L2 C243AL1 ...

Page 2: ...ions 9 Refrigeration Cycle Diagram 11 Wiring Diagram 12 Operation Details 13 Display Function 20 Self diagnosis Function 20 Installation 21 Operation 35 Disassembly of the parts Indoor Unit 37 2 way 3 way Valve 39 Cycle Troubleshooting Guide 43 Electronic Parts Troubleshooting Guide 45 Electronic Control Device 52 Schematic Diagram 55 Exploded View 57 Contents ...

Page 3: ...itched from high to low speed The louver can be set at the desired position or swing up and down automatically Functions Indoor Unit Operation ON OFF by Remote controller Sensing the Room Temperature Room temperature control Starting Current Control Time Delay Safety Control Indoor Fan Speed Control Operation indication Lamps LED OUT DOOR Health Dehumidification Operation Both the indoor and outdo...

Page 4: ...ation C To F Swtiching Button Room Temperature Display Setting the Time or Timer Airflow Direction Control Operation ON OFF Temperature Setting TEMPERATURE LOW HIGH Timer Selection ON OFF C F Timer Setting SET Timer Cancel CANCEL Fan Operation Mode Reset Fan Speed Selection Low Med High CHAOS Down to 18 C 64 F Up to 30 C 86 F Cooling Cancel Sleep Mode Timer ON or Timer OFF 1 2 3 4 5 6 7 Off Timer ...

Page 5: ... 5 Indoor 802 x 262 x 165 Outdoor 870 x 655 x 320 Indoor 7 Outdoor 61 Liquid 6 35 1 4 Gas 9 52 3 8 780 780 at 7 5m O L C D Wireless O O Operation A Unit Only B Unit Only A Unit B Unit Remarks Unit Item Cooling Capacity Heating Capacity Moisture Removal h Power Source ø V Hz Air Circulation min Noise Level dB A Input W A E E R Btu h w C O P Dimensions W x H x D mm Net Weight kg Service Valve mm Inc...

Page 6: ... 5 4 0 10 1 10 6 9 1 9 5 9 1 9 5 2 97 3 10 2 68 2 78 2 68 2 78 Indoor 802 x 262 x 165 Outdoor 870 x 655 x 320 Indoor 7 Outdoor 63 Liquid 6 35 1 4 Gas 9 52 3 8 780 780 at 7 5m O L C D Wireless O O Operation A Unit Only B Unit Only A Unit B Unit Remarks Unit Item Cooling Capacity Heating Capacity Moisture Removal h Power Source ø V Hz Air Circulation min Noise Level dB A Input W A E E R Btu h w C O ...

Page 7: ...door 888 x 287 x 170 Outdoor 870 x 655 x 320 Indoor 7 Outdoor 61 Liquid 6 35 1 4 Gas 12 7 1 2 880 880 at 7 5m O L C D Wireless O O Operation A Unit Only B Unit Only A Unit B Unit Remarks Unit Item Cooling Capacity Heating Capacity Moisture Removal h Power Source ø V Hz Air Circulation min Noise Level dB A Input W A E E R Btu h w C O P Dimensions W x H x D mm Net Weight kg Service Valve mm Inch Ref...

Page 8: ... 10 0 6 2 5 7 6 2 5 7 9 8 10 0 9 1 9 2 9 1 9 2 2 89 2 93 2 66 2 70 2 66 2 70 Indoor 888 x 287 x 170 Outdoor 870 x 655 x 320 Indoor 7 Outdoor 63 Liquid 6 35 1 4 Gas 12 7 1 2 880 880 at 7 5m O L C D Wireless O O Operation A Unit Only B Unit Only A Unit B Unit Remarks Unit Item Cooling Capacity Heating Capacity Moisture Removal h Power Source ø V Hz Air Circulation min Noise Level dB A Input W A E E ...

Page 9: ...Left rear piping ø70mm ø70mm 50mm 20mm 20mm 80mm A A ø70mm Center Center ø70mm Left rear piping Right rear piping A A D H W Tubing hole cover W mm 802 888 H mm 262 287 D mm 165 170 LM 1830C2L M LM 1830H2L M LM 2430C2L M LM 2430H2L M MODEL DIM LM 1830C2L M LM 1830H2L M LM 2430C2L M LM 2430H2L M 1 Indoor Unit Pipe Hole Fix Hole Hanger Hole H W D Capacity W H D SP1 Ch 9K 12K 570 568 137 ...

Page 10: ...Use Only W D L1 L2 L9 L4 L3 H L10 L10L10 L8 Gas side 3 Way valve Liquid side 2 Way valve L7 L5 L6 2 Outdoor Unit W mm 870 H mm 655 D mm 320 L1 mm 370 L2 mm 25 L3 mm 630 L4 mm 25 L5 mm 546 L6 mm 160 L7 mm 160 L8 mm 64 L9 mm 76 5 L10 mm 50 LM 1830C2L M LM 1830H2L M LM 2430C2L M LM 2430H2L M L2 C243AL1 MODEL DIM ...

Page 11: ...VALVE B UNIT A UNIT 3 WAY VALVE 4 WAY VALVE Indoor Unit Outdoor Unit Pipe Size Diameter inch Max piping length m Max piping elevation m Gas Btu h Liquid 1 2 1 4 15 8 3 8 24K 18K 1 4 15 8 ex Capillary Cooling Deice A UNIT B UNIT CAPILLARY TUBE LIQUID SIDE 2 WAY VALVE GAS SIDE 3 WAY VALVE HEAT EXCHANGER EVAPORATOR HEAT EXCHANGER CONDENSER COMPRESSOR B COMPRESSOR A 1 LM 1830C2L M LM 2430C2L M L2 C243...

Page 12: ...R OR BR YL MOTOR BK T B1 BK BK YL RD BK BK BR BL OR RD C G V S C G V S C G V S C G V S BK BR BL RD BK BR BL BK BK BR BL WH BL BL GN YL L2 L1 MAIN POWER FUS250V 2 5A FUS250V 2 5A FUS250V 2 5A FUS250V 2 5A OUTDOOR WIRING DIAGRAM 3854A20075K BK CAPACITOR TRANS FORMER CN SV CN POWER CN COMP1 CN COMP2 FUSE T3 15A CN TRANAS RY COMP A RY COMP B RY FAN1 MAIN DC PCB ASSY MAIN AC PCB ASSY PILLAR TERMINAL TO...

Page 13: ...eep timer 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 C below the setting temp the compressor and the outdoor fan stop When it reaches 0 5 C above t...

Page 14: ...e indoor pipe temp is below 33 C when above 35 C it operates with the low airflow speed If overloaded while in heating mode operation in order to prevent the compressor from OLP operation the outdoor fan is turned on off according to the indoor pipe temp While in defrost control both of the indoor and outdoor fans are turned off Defrost Control H P model Defrost operation is controlled by timer an...

Page 15: ... outdoor fan and the 4 way valve are off and only the indoor fan is operated for 15 seconds Then an operation mode is selected according to the intake air temp at that moment as follows 24 C Inatake Air Temp Fuzzy Operation for Cooling 21 C Inatake Air Temp 24 C Fuzzy Operation for Dehumidification Inatake Air Temp 21 C Fuzzy Operation for Heating If any of the operation modes among cooling dehumi...

Page 16: ... for Heating According to the setting temperature selected by Fuzzy rule when the intake air temp is 3 C or more above the setting temp the compressor is turned off When below the setting temp the compressor is turned on Compressor ON Temp Setting Temp Compressor OFF Temp Setting Temp 3 C At the beginning of Fuzzy mode operation the setting temperature is automatically selected according to the in...

Page 17: ...ction While in Chaos Swing mode the angles of cooling and heating cycle operations are different Chaos Natural Wind Mode When the Chaos Natural Wind mode is selected and then operated the high medium or low speed of the air flow mode is operated for 2 15 sec randomly by the Chaos Simulation Jet Cool Mode Operation C O Model If the Jet Cool key is input at any operation mode while in appliance oper...

Page 18: ... the appliance stops operating The forced operation is carried out in cooling mode with the setting temperature 22 C and the high speed of airflow While in forced operation the key input by the remote control has no effect and the buzzer sounds 10 times to indicate the forced operation Forced Operation H P Model To operate the appliance by force in case that the remote control is lost the forced o...

Page 19: ...are turned off in order to protect the indoor evaporator pipe from frosting When the indoor pipe temp is 7 C or higher after 3 min pause of the compressor the compressor and the outdoor fan is turned on according to the condition of the room temperature Buzzer Sounding Operation When the appliance operation key is input by the remote control the short beep beep sounds When the appliance pause key ...

Page 20: ...error code is different from Model 1 3times 3sec 3sec 5times 3sec twice 3sec 3sec once 3sec 3sec 3sec 2 3 5 8 Error Code Error LED Indoor body operation LED Error contents SVC check point Indoor suction temperature thermistor open short Indoor pipe temperature thermistor open short Indoor TH ass y check Outdoor TH ass y check Resetting of remocon operating mode Communication line circuit check Out...

Page 21: ...om will be good A place where drainage can be easily obtained A place where noise prevention is taken into consideration Do not install the unit near the door way Ensure the spaces indicated by arrows from the wall ceiling fence or other obstacles 2 Outdoor unit If an awning is built over the unit to prevent direct sunlight or rain exposure be careful that heat radiation from the condenser is not ...

Page 22: ... of the thread and a level 2 Drill the piping hole with 70mm dia holecore drill Line according to the arrows marked on lower the left and the rght side of the Installation Plate The meeting point of the extended line is the center of the hole Drill the piping hole at either the right or the left and the hole should be slightly slant to the out door side Installation Plate marking off line Thread W...

Page 23: ...ion ports of both indoor and outdoor unit onto the copper pipes Some refrgerant gas may leak when the flare nuts are removed from the indoor unit as some gas is charged to prevent the inside of the pipe from rusting Fit the copper pipe end into the Bar of flare tool about 0 0 5mm higher See illustration Flare the pipe ends 4 Tape the flaring portion to protect it from the dust or damages 90 Slante...

Page 24: ...ting cable into the indoor unit through the piping hole Do not connect the cable to the indoor unit Make a small loop with the cable for easy con nection later 5 Tape the tubing drain hose and the connecting cable Be sure that drain hose locates at the lowest side of the bundle Locating at the upper side can be a reason that drain water overflows drain pan inside the unit Installation plate Pull P...

Page 25: ...the hooks are properly seated on the installation plate by moving it in left and right 7 Connecting the pipings to the indoor unit Align the center of the pipings and sufficiently tighten the flare nut with fingers Finally tighten the flare nut with torque wrench until the wrench clicks Wrench tightening the flare nut with forque wrench ensure the direction for tightening fol lows the arrows on th...

Page 26: ...bottom of chassis 10 Indoor unit installation Hook the indoor unit onto the upper portion of installation plate Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate Ensure the hooks are properly seated on the installation plate by moving it in left and right Drain hose Tubing holder Taping Piping Push 2 Hook 1 Connecting cable Drain hose Press the l...

Page 27: ...B UNIT Torque wrench 1 Connecting the pipings to the Outdoor unit 1 Align the center of the pipings and sufficiently tighten the flare nut with fingers 2 Finally tighten the flare nut with torque wrench until the wrench clicks When tightening the flare nut with torque wrench ensure the direction for tightening follows the arrow on the wrench Pipe Size Torque Liquid Side 1 4 1 8kg m Gas Side 3 8 4 ...

Page 28: ...ol board with the holder clamper 6 Ground the unit in accordance with local codes 7 Refix the cover control to the original position with the screw 8 Use lock nuts to secure the conduit tubes 1 Separately wire the high and low voltage line 2 Use heat proof electrical wiring capable of withstanding temperature up to 167 F 3 Use outdoor and waterproof connection cable rated more than 300V for the co...

Page 29: ...ting pli ers then strip the insulation to expose the solid wire about 25mm 15 16 2 Using a screwdriver remove the terminal screw s on the terminal plate 3 Using pliers bend the solid wire to from a loop suit able for the terminal screw 4 Shape the loop wire properly place it on the terminal plater and tighten securely with the terminal screw using a screwdriver For strand wiring 1 Cut the wire end...

Page 30: ...d engage four tabs on the top inside edge of the chassis Press the Grille toward the chassis until it will be back into place CAUTION CAUTION Air Conditioner Circuit Breaker Use a circuit breaker or time delay fuse Connecting cable Main power source If a power plug is not to be used provide a circuit breaker between power source and the unit as shown below Model 18K 1ø 230 208V 15A 24K 1ø 230 208V...

Page 31: ...s If you want to connect an additional drain hose the end of the drain outlet should be routed above the ground Secure the drain hose appropriately 2 In cases where the outdoor unit is installed below the indoor unit perform the following Tape the piping drain hose and connecting cable from down to up Secure the tapped piping along the exterior wall using saddle or equivalent 3 In cases where the ...

Page 32: ... gas leakage with gas leak detector 3 Remove the service port nut and connect the gauge manifold and the vacuum pump to the service port by the charge hose 4 Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below 76cmHg 5 Disconnect the charge hose and fit the nut to the service port Tightening torque 1 8kg m 6 Remove the valve stem nuts and fully open the stems...

Page 33: ...harge INDOOR UNIT INDOOR UNIT OUTDOOR UNIT B Length D Length A Height C Height Model STANDARD CONNECTION TYPE Charge am t g LENGTH m A B C D per 1m LM 1830C2L M 7 5 7 15 7 15 20 LM 1830H2L M LM 2430C2L M 7 5 7 15 7 15 20 LM 2430H2L M A B mean indoor unit higher located than outdoor unit C D mean outdoor unit higher located than indoor unit Charge amount per 1m ...

Page 34: ... with an anti vibration rubber 2 Evaluation of the performance 1 Measure the temperature of the intake and discharge air 2 Ensure the difference between the intake temperature and the discharge one is more than 8 C 1 Connection of power supply 1 Connect the power supply cord to the inde pendent power supply 2 Prepare the remote control Insert two batteries provided Remove the battery cover from th...

Page 35: ...TON Operation starts when this button is pressed and stops when the button is pressed again OPERATION MODE SELECTION BUTTON Used to select the operation mode ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature INDOOR FAN SPEED SELECTOR Used to select fan speed in four steps low medium high or CHAOS JET COOL Used to start or stop the speed cooling Speed cooling operates super high ...

Page 36: ...UTTONS Used to set the time of starting and stopping operation TIME SETTING BUTTONS Used to adjust the time TIMER SET 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 TEMPER...

Page 37: ...witch 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 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 step motor conductor with sensor holder Motor Evaporator P C ...

Page 38: ...To remove the Evaporator Remove screws securing the evaporator and the holder eva Unhook the tab on the right inside of the chas sis at the same time slightly pull the evapora tor 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 sepa...

Page 39: ...e cap with valve cap with cap Pumping down Closed Open Open Transfering clockwise counter clockwise connected manifold gauge Evacuation Open Open Open Servicing with charging cylinder 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 2 way 3 way Valve 3 2 1 4 5 6 ...

Page 40: ...en the Low handle valve on the gauge slightly to air purge from the hose 5 Set the liquid side valve to the closed position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm2 g 7 Immediately set the gas side valve to the closed position Do this quickly so that the gauge ends up indi cating 1kg g 8 Disconnect the charge set and mount the liquid side and ...

Page 41: ...e has moved toward 76 cmHg vacuum of 4 mmHg or less 5 Close the Low handle of the gauge turn off the vacuum pump and confirm that the gauge nee dle does not move approximately 5 minutes after turning off the vacuum pump 6 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or deplet ed replenish as needed 7 Mount the valve caps and the service port ...

Page 42: ...onditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the gas side valve s service port Stopping partway will allow the gas to be dis charged If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner bef...

Page 43: ...efrigeration cycle Notice 1 The suction pressure is usually 4 5 6 0 kg cm2 G at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty Cycle Troubleshooting Guide Temp difference approx 0 C Current less than 80 of rated current Temp difference approx 8 C Current less than 80 of rated current Temp difference less than 8 C Cu...

Page 44: ... error code in indoor unit Max capacity Step Step 1 Step 2 Step 3 Outdoor Operation Mode COMP 40 B only COMP 60 A only COMP 100 A B together 18k Max 19k Cooling Qs 7k Qs 12k 12k Qs Heating Qs 9k 12k Qs 21k Max 23k Cooling Qs 9k Qs 12k 12k Qs Heating Qs 9k 12k Qs 30k Max 33k Cooling Qs 12k Qs 19k 19k Qs Heating Qs 12k Qs 19k 19k Qs Outdoor Max capacity 14k 14k combination 18k 19kcombination 21k 23k...

Page 45: ...onnecting cable Check Fuse Outdoor PCB Ass y Check Varistor ZNRØ1J Outdoor PCB Ass y Check the connection housing for contacting Connector related to CN DC AC Display PWB Ass y Check Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor etc and contacting condition of related connector PCB Board Operation Check Items Power Transformer Outdoor unit Input Voltage Output Voltage IC01D 78...

Page 46: ...or 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 impossible to operate temperature regulating and wind speed sel...

Page 47: ... Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger EVA When the sensor circuit for indoor temperature and connector are in bad connection 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 Indoor unit Check the indoor temperature sensor is disconnected or not Ab...

Page 48: ...plied with Wiring Diagram Check the line fuse in the outdoor unit Check the connection of CN MOTOR check the operation of blower by manual Correct connection line 4 When indoor Fan does not operate or ON OFF led of display blinks 8 times Check POLY S W in indoor PCB Ass y If it is opened If it is shorted Exchange Indoor PCB Ass y Check the outdoor PCB Ass y Bad connection Good connection ...

Page 49: ...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 does not operate Check the operating circuit of the Vertical Louver Confi...

Page 50: ... fan operates in case the pipe temperature is higher than 28 C 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 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 Turn ON Main Power Check if connection line Indoor Outdoor...

Page 51: ...oor unit does not operate at all 8 Communication error The control data can be transmitted or received between indoor and outdoor unit with one signal cable If the data be disturbed by any noise level and misconnection the unit will be operated incorrectly In this case the indoor unit blinks the operation and operation LED on display and indoor fan outdoor fan COMP are not operated The unit can be...

Page 52: ...Electronic Control Device 52 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 Indoor MAIN P C B ASM ...

Page 53: ... 53 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 Outdoor MAIN P C B ASM ...

Page 54: ... 54 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 Display Ass y ...

Page 55: ... 55 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Schematic Diagram 1 Indoor ...

Page 56: ... 56 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 Outdoor ...

Page 57: ...ses LGE Internal Use Only Exploded View and Replacement Parts List 1 Indoor Unit LM 1830C2M LM 1830H2L M 135316 135314 268711A 267110 135311 354210 159830 Applied for Plasma Model 249951 152302 135511 147581 342800 131410 733010 346812 263230A 268711B 352150 146811 35211B 359011 152313 Option ...

Page 58: ...raining and service purposes LGE Internal Use Only 2 Indoor Unit LM 1830C2L 135316 3531A20003L 268711A 267110 135311 354210 159830 Applied for Plasma Model 249951 152302 135511 147581 342800 131410 733010 346812 263230A 268711B 352150 146811 35211B 359011 152313 Option ...

Page 59: ...ervice purposes LGE Internal Use Only 3 Indoor Unit LM 2430C2L M LM 2430H2L M 135316 135314 268711A 267110 135311 354210 249951 152302 135511 147581A 147581B 342800 131410 733010 346812 263230A 268711B 352150 146811 35211B 359011 W6640 159830 Applied for Plasma Model 152313 Option ...

Page 60: ...5515 267110 135500 3 349600 135500 2 135311 1 146811 147581 330870 135311 3 146811 346810 135500 1 146811 135311 2 131410 352380 352150 35211B 263230 2 263230 1 147581 152302 135314 268712 268717 135316 354210 144710 2 146811 146811 144710 1 147581 352116 352115 249951 249941 266090 268715 159830 268716 4 Indoor Unit L2 C243AL1 ...

Page 61: ...and service purposes LGE Internal Use Only 5 Outdoor Unit LM 1830C2L M LM 2430C2L M L2 C243AL1 435512 554031 137213 435301 349480 437211 W0CZZA 261704 W0CZZB 263230B 268711C 447910 435511 649950 268711D 552111B 552111A 430411 349610 554160 552203A 552203B 552203C 546810 559010 ...

Page 62: ...LGE Internal Use Only 6 Outdoor Unit LM 1830H2L M LM 2430H2L M 435512 554031 435300 137213A 137213B 435301 437211 349480 447910 435511 561410A 430411 550140 349610 554160 552202 552203A 552203B 552203C W0CZZA 261704 W0CZZB 263230B 268711C 649950 552111B 552111A 268711D 552116 561410B 546810 559010 ...

Page 63: ...P NO 3828A20097A September 2008 ...

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