LG LP-E5020CL Service Manual Download Page 6

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1.4 Functions

Indoor Unit

Power Switch ON/OFF

Operation Mode Control

Sensing the room temperature

Controlling the room temperature

Starting Current Control

Sensing Heat Exchanger Temperature

Timer Delay Safety Control

Indoor Fan Speed Control

Operation Indication lamps

Temperature Setting

Airflow Direction Control

Room temperature Display

Timer Control

Sensing Discharge Air Temperature

• Cooling, Soft Dry, Auto, Fan

¢¡

Cooling Model

• Cooling, Heating, Soft Dry, Fan

¢¡

Heat Pump Model

• Room temperature sensor (Thermistor)

• Maintains the room temperature in accordance with the setting temperature.

• Indoor fan is delayed for 3 sec at the starting.

• Heat exchanger temperature sensor (Thermistor)

• Restarting is inhibited for approx. 3 minutes.

• High, Med, Low

• Up : up to 30°C
• Down : down to 16°C

• Airflow direction Automatic and Manual control

• Low, 10° ~ 35°C, Hi

• Off Timer (1, 2, 3....7 hour)

• Discharge temperature sensor <Thermistor>
• Apply Heat Pump Model Only.

Summary of Contents for LP-E5020CL

Page 1: ...Package Air Conditioner SERVICE MANUAL MODEL LP E5020CL LP E5022CL CA HL HA LP E5082CL CA HL HA ZL ZA LP E5092CL CA HL HA LP E50B0CL CA HL HA ...

Page 2: ...ycle Diagram 9 4 Wiring Diagram 10 5 Operation Details 18 6 Installation 24 7 Operating 40 8 3 Way Valve 43 9 Troubleshootig Guide 51 10 Electronic Control Device 66 11 Schematic Diagram 68 12 Exploded View Replacement Parts List 70 2 CONTENTS ...

Page 3: ...TCH to OFF and remove the POWER SUPPLY cables Ł Observe the original lead dress If a short circuit is found replace all parts which have been overheated or damaged by the short circuit Ø After servicing the unit make an insulation resistance test to protect the customer from being exposed to shock hazards 1 2 Features Design for cooling and heating ŁSuper energy efficiency ØMicom Control ŒWhisper ...

Page 4: ...000 14069 14 069 3 000 3 500 4900 3 000 5 5 24 13 5 Tecumseh Tecumseh Copeland Copeland Recipro Recipro Recipro Recipro AVB5558EXG AVB5558EXG CR42K6 PFV CRMQ 0400 PFV 4 340 4 340 3 860 5 370 6 9 6 9 17 8 25 2 11 620 11 620 10 559 12 928 53 53 53 53 58 58 58 58 35 35 35 35 104 104 104 104 2 8 3 2 3 5 3 9 3 28 17 3 28 17 3 28 17 3 28 17 2 44 16 2 44 18 2 44 16 2 44 17 SIROCO SIROCO SIROCO SIROCO PRO...

Page 5: ... 2 8 2 48 000 48 000 14 069 14 069 5 000 4 500 9 8 Copeland Copeland Copeland Copeland Recipro Recipro Recipro Recipro CRNQ 0501 ES8 CRNQ 0501 ES8 CRNQ 0501 ES8 CRNQ 0501 ES8 6 210 6 210 6 210 6 210 19 0 11 0 19 0 11 0 19 0 11 0 19 0 11 0 61 500 61 500 61 500 61 500 53 53 53 53 58 58 58 58 35 35 35 35 104 104 104 104 3 5 3 9 4 4 2 3 28 17 3 28 17 3 28 17 3 28 17 2 44 16 2 44 18 2 44 16 2 44 18 SIR...

Page 6: ...ensing Discharge Air Temperature Cooling Soft Dry Auto Fan Cooling Model Cooling Heating Soft Dry Fan Heat Pump Model Room temperature sensor Thermistor Maintains the room temperature in accordance with the setting temperature Indoor fan is delayed for 3 sec at the starting Heat exchanger temperature sensor Thermistor Restarting is inhibited for approx 3 minutes High Med Low Up up to 30 C Down dow...

Page 7: ...eat Pump Model Fan Speed Selection Setting the temperature Timer Control Airflow Direction Control High Medium Low Up or Down Off Timer 1 2 3 7 hour Airflow direction Auto Swing and Manual control Outdoor Unit Deice Control Outdoor Fan Speed Control Sensing Heat Exchanger Temperature De ice PCB One speed Heat exchanger temperature sensor Thermistor ...

Page 8: ...243 548 899 370 125 210 290 1220 460 460 505 90 130 640 900 1 Indoor Unit 2 Outdoor Unit 8 2 DIMENSIONS Air Outlet Vent ŁAir Inlet Vent ØWindow display ŒEarth Screw Air Outlet Vent ŁLiquid Side SVC Valve ØGas Side SVC Valve ŒControl Box ºEarth Screw ...

Page 9: ...MUFFLER COMPRESSOR HEAT EXCHANGER CAPILLARY TUBE HEAT EXCHANGER HEAT EXCHANGER 3 WAY VALVE GAS SIDE 3 WAY VALVE LIQUID SIDE CHECK VALVE CAPILLARY TUBE 4 WAY VALVE MUFFLER COMPRESSOR COOLING HEATLNG DE ICE ACCUMULATOR 3 WAY VALVE GAS SIDE 3 WAY VALVE OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT 3 2 CoolingandHeatingCycle ...

Page 10: ...BLUE BLACK BROWN ORANGE RED WHITE YELLOW GREEN YELLOW TERMINAL BLCOCK BR BK BK BK BK RD RD BK BK BK BK OR OR BK OR BK FAN MOTOR FAN MOTOR COMP T1 T2 T3 OR BK YL YL WH CAPACITOR CAPACITOR TERMINAL BLOCK TO INDOOR UNIT 1 2 3 4 WH WH RD WH FUSE 250V 5A FUSE 250V 5A 1 2 3 4 5 6 31 32 B A POWER SUPPLY R S T N OUTDOOR ELECTRIC CIRCUIT ...

Page 11: ...eice PCB C TH TNS NO NC WH OR BK POWER RELAY 1 2 3 4 5 6 31 T B1 T B2 32 B A FAN MOTOR FAN MOTOR YL BK OR BK T3 T2 T1 RD WH COMP 1 2 3 4 5 6 7 8 YL BK OR BK BK BL BL BK WH CAPACITOR CAPACITOR REVERSING VALVE BR BL BR BL GN YL GN YL TERMINAL BLOCK To the indoor unit 1 2 3 4 5 6 BK WH WH YL BK RD Fuse 250V 5A Fuse 250V 5A OUTDOOR UNIT WIRING DIAGRAM ...

Page 12: ... 12 3 LP E5020CL LP E5022CL CA WIRING DIAGRAM ...

Page 13: ... 13 4 LP E5022HL HA ...

Page 14: ...RD WH RD OR BK BK Co WH BK RD RDRDRD GN YL WH U V Z W X Y L1 L2 2 4 6 32 1 3 5 31 B A Tb Ta Tc BL Co Outdoor Motor YL BR ORBK YL BRORBK Outdoor Motor RD FUSE 250V 5A FUSE 250V 5A BL RD BL BK BK BK To Indoor Unit WH RD GN YL Tmo 1 2 3 4 RD WH CH R S T N RUN CAPACITOR FOR MOTOR MAGNETIC CONTACTOR EOCR TERMINAL BLOCK Outdoor Unit MAIN TERMINAL BLOCK CRANKCASE HEATER 3ø 220V 60Hz CURRENT A 30 TIME sec...

Page 15: ... CH 20SV 52C TM 52F1 51C CM Co FMo F1 DP TMo HIGH PRESSURE SWITCH FOR HEATING THERMISTOR FOR PIPE TEMP INTERNAL T P FOR FMo CRANKCASE HEATER REVERSING COIL MAGNETIC CONTACTOR MAIN TERMINAL BLOCK RELAY FOR FMO E O C R COMPRESSOR RUN CAPACITOR FOR FMo OUTDOOR FAN MOTOR FUSE 250V 10A DEICER PCB TERMINAL BLOCK Caution 1 Basic wiring is 3ø 3 wires 220V 2 For setting E O C R current POWER SUPPLY 3ø 220V...

Page 16: ...D WH RD OR BK BK Co WH BK RD RDRDRD GN YL WH U V Z W X Y L1 L2 2 4 6 32 1 3 5 31 B A Tb Ta Tc BL Co Outdoor Motor YL BR ORBK YL BRORBK Outdoor Motor RD FUSE 250V 5A FUSE 250V 5A BL RD BL BK BK BK To Indoor Unit WH RD GN YL Tmo 1 2 3 4 RD WH CH R S T N RUN CAPACITOR FOR MOTOR MAGNETIC CONTACTOR EOCR TERMINAL BLOCK Outdoor Unit MAIN TERMINAL BLOCK CRANKCASE HEATER 3ø 380V 60Hz CURRENT A 17 5 TIME se...

Page 17: ...Co Co RD BK D P C TH TNS NO NC WH WH WH YL WH BK BK OR RD WH WH 52C CH 63H2 52F1 51C F1 b 3ø 4 wires 380V R S T N 1 2 3 4 5 6 3ø 4 wires 380V 3ø 3 wires 220V V U W Y X Z V U W Y X Z 3 For setting E O C R current POWER SUPPLY 3ø 220V 60HZ 3ø 380V 60HZ CURRENT A 30 0 17 5 TIME sec 5 5 63H2 C TH 63H1 CH 20SV 52C TM 52F1 51C CM Co FMo F1 DP TMo HIGH PRESSURE SWITCH FOR HEATING THERMISTOR FOR PIPE TEMP...

Page 18: ...ly and to set it at the desired position The procedure is as the following 1st Press the ON OFF Button to operate the product 2nd Press the Airflow Direction Control Button to swing the louver left and right automatically Remote controller 3rd Repress the Airflow Direction Control Button to set the louver as the desired position Remote controller 3 Cooling Mode Operation When selecting the Cooling...

Page 19: ...dition Intake air Temperature Setting temperature Fan speed Over 26 C 25 C Over 24 C below 25 5 C Intake air 1 0 C Over 22 C below 23 5 C Intake air 0 5 C below 21 5 C Intake air Temperature 18 C MAX When Switch to Auto Operation Controlled by Fuzzy logic Intake Air Temp Indoor Fan Speed Compressor ON OFF Fuzzy Speed ON OFF Setting Temp 1 C Compressor ON Setting Temp 1 C Compressor OFF 3 minutes 3...

Page 20: ...ature to be less then 35 C or Discharge air Temperature to be less than 29 C The indoor fan operates for minimum 10sec even if the indoor pipe temperature falls lower than35 C or the discharge air Temperature falls lower than 29 C Low V Stop VI 39 C Discharge Air Temp Indoor Pipe Temp 34 C 28 C 26 C Selecting Fan Speed IV Low II Stop I Hot Start Operating Heating Start Hot Start Release Point Sele...

Page 21: ...frost ends after 10 minutes pass from starting of defrost operation or when the outdoor pipe temperature rises over 12 C even if before 10 minutes The second defrost starts only when the outdoor pipe temperature falls below 6 C after 45 minutes pass from ending of the first defrost and more than 21 INDOOR PIPE TEMP INDOOR FAN SPEED Selecting fan speed OFF OFF LOW 1min Maximum COMPRESSOR ON 28 C 26...

Page 22: ...mpres sor OFF temperature is the setting temperature minus 1 C When the room temperature rises over the compressor ON temperature the operation mode is switched to the Cooling mode When the room temperature falls between the compressor ON temperature and OFF temperature the opera tion mode is switched to the Soft Dry Operation The operation diagram is shown below Intake Air Temp Indoor Fan Speed L...

Page 23: ...peration shall be stopped and the set shall start When test operation operating the display of 8 88 8 8 88 8 shall be shifted to tESt 4 way valve is always off when test operation Fan speed is high air purifying system and auto air flow operations are off when test operation Regardless of outside temperature the set operates when test operation All but start stop and air purifying system buttons c...

Page 24: ...icated by arrows from the wall ceiling fence or the obstacles MOutdoor unit If an awning is built over the unit to prevent direct sunlight or rain exposure be careful that heat radia tion from the condenser is not restricted There should not be any animals or plants which could be affected by discharged hot air Ensure the space indicated by arrows from the wall ceiling fence or other obstacles NPi...

Page 25: ...nd nuts MIf there is any vibration transmitted to the building mount the rubber underneath the outdoor unit 4 Refrigerant amount Before shipment this air conditioner is filled with the rated amount of refrigerant including additional amount required for air purging subject to 5m piping length The rated amount of refrigerant is indicated on the name plate But when the piping length exceeds 5 meters...

Page 26: ...r unit 8 Check the gas leakage of the connecting part of the pipings 9 Air purging of the piping and indoor unit The air which contains moisture and which remains in the refrigeration cycle may cause malfunction on the compressor 10 Open the 3 way liquid side and 3 way gas side valves 11 Form the pipings To prevent heat loss and sweat 12 Checking the drainage indoor unit To ensure if water flows d...

Page 27: ...panner To tighten the connecting parts of the pipings 13 Monkey spanner 14 Driver 15 Benchi 150mm Cutting the wires 16 Tapeline To measure the length 17 Core drill To make holes through the concrete to wall and blocks 18 Voltmeter Amperemeter Clampmeter To measure the current and voltage 19 Insulation resistance tester To measure the insulation resistance 20 Glass thermometer To measure the intake...

Page 28: ...se gas leakage ØFlaring the pipes Insert the flare nuts mounted on the connection ports of both indoor and outdoor unit onto the copper pipes Some refrigerant 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 illustaration Flare the pipe ...

Page 29: ...e wrench until the wrench clicks When tightening the flare nut with troque wrench ensure the direction for tightening follows the arrow on the wrench 3 Pre cautions in bending If it is necessary to bend or stretch the tubing use the Spring which is attached to the tubing instead of pipe bender Please make a careful notice to make a smooth line Hold the tubing with your two hands closely and then b...

Page 30: ...d after opening the inlet grille Open the inlet grille manually ŁOpen the control cover with Driver ØConnect the wire to the housing on the control board ŒSecure the cable onto the control board with clamp ºSecure the control cover to the original position with the screw Close the inlet grille 30 ...

Page 31: ...rque wrench ensure the direction for tightening follows the arrow on the wrench 2 Connecting the cables to the outdoor unit 31 Gas side piping Liquid side piping Torque wrench Outdoor unit Pipe Size Torque 3 8 4 2 Kg m 3 4 6 5 Kg m Open the control board cover from the outdoor unit by removing the screws ØSecure the cable onto the control board with clamp ŒSecure the control board cover to the ori...

Page 32: ...e to burn out of the wires ŒSpecification of power source ºConfirm that electrical capacity is sufficient See to that the starting voltaged is maintained at more than 90 percent of the rated voltage marked on the name plate Confirm that the cable thickness is as specified in the power sources specification Particularly note the relation between cable length and thickness Never fail to equip a leak...

Page 33: ...one minute Repeat this three times Re tighten the connecting portion with torque wrenches locate a repair leak Result 5 6 6 7Air Purging of the Piping and Indoor Unit 1 Air purging The air which contains moisture and remains in the Refrigeration cycle may cause a malfunction on the compressor Remove the caps from the 3 way liquid side and 3 way gas side valves Ł Remove the service port cap from th...

Page 34: ...Checking the gas leakage for the left piping Connect the manifold gauge to the service port of 3 way gas side valve Measure the pressure Keep it for 5 10 minutes Ensure if the pressure indicated on the gauge is as same as that measured at first time 34 CLOSED CLOSED Closed Closed Indoor unit Outdoor unit Liquid side Gas side ...

Page 35: ...ng 1 Checking the Drainage Remove the inlet grille with your hands as shown right and left and pull in the direction indicated by the arrow ŁCheck the drainage Pour a glass of water into the Drain pan Ensure if water flows drain hose of indoor unit ...

Page 36: ...piping from a trap Ø Fix the piping onto the wall with saddle or bracket When using the drain elbow hose use a mount of 3cm of higher ŁIn the cold district 0 c continued for 2 3 days the drain water is frozen and the fan fails to function do not use the drain elbow 36 In case the outdoor unit is installed below position of the indoor unit In case the outdoor unit is installed upper position of the...

Page 37: ...are the running test as follows Connect compound gauges to the check joints at discharge and suction sides of the compressor ŁTurn all switches OFF ØTurn the main switch ON Running test should be accomplished as follows Set operation switch at FAN and the fan will start Check to ensure that the fan sounds normal Ł Next set it at COOL and the compressor will start Check to ensure that the compresso...

Page 38: ...em adequate Wire Size Tightened Connection Switch Size Operation Control Devices Fuse Size Safety Devices Voltage Hz 3 Does the refrigerant piping work adequately Pipe Size Leakage Insulation Refrigerant Charge Vibration Trap 4 Does the duct work adequately Pipe Size Sound proof Insulation Vibration Proof Vibration 5 Are the condensate drain lines properly arranged Trap Drain Ditch 6 Are the servi...

Page 39: ... C 8 Check outdoor temperatures Inlet DB __________ C Outlet DB __________ C 9 Check pressures Discharge pressure ________kg cm2 Suction pressure ____kg cm2 10 Check voltage Rated voltage ________ V Operating voltage R S __________ V S T _____ V T R ______V Starting voltage _____ V 0 85 x Rated Voltage Phase unbalance 1 V V mean ______ 0 03 Imbalance 0 03 11 Check running current packaged air cond...

Page 40: ...ON OPTION Used to purify the Room air FAN OPERATION LAMP COOLING OPERATION LAMP SOFT DRY OPERATION LAMP HEATING OPERATION LAMP DEFROST OPERATION LAMP æAUTO OPERATION LAMP OFF TIMER OPERATION LAMP OFF TIMER OPERATION LAMP HORIZONTAL AIR FLOW AIR CLEANER OPERATION LAMP OPTION ıELECTRIC HEATER OPERATION LAMP OUT DOOR UNIT OPERATION LAMP æELECTRIC HEATER OPERATION BUTTON OPTION MODE A CL A CL OUT DOOR...

Page 41: ...The horizontal louvers can be adjusted manually Auto Mode Operation Button Cooling Model Only Plasma Air purifying Button Option æ Indoor Fan Operation Button Heating Button Heat Pump Model Electric Heater ON OFF Button Option Soft Dry Operation Button Wireless Remote Control Puts all functions at your fin gertips Handling the remote control Aim at the signal receptor on the package air con dition...

Page 42: ...ver into back position 1 How to mount onto a wall Use the screws to secure the holder to the wall or attach the holder side of indoor unit 2 To insert the remote control to the holder Do not use rechargeable batteries such batteries as different from standard dry cells in shape dimensions and performance Change the batteries with new ones if the remote controller does not work properly after using...

Page 43: ...h valve cap with valve cap 1 Air purging Open Closed Open Installation counter clockwise clockwise push pin Operation Open Open Closed with valve cap with valve cap 2 Pumping down Open Open Open transferring clockwise counter connected clockwise manifold gauge 3 Evacuation Open Open Open Servicing with charging cylinder 4 Gas charging Open Open Open Servicing with charging cylinder 5 Pressure chec...

Page 44: ...e to the open posi tion and remove the cap from the 3 way gas side valve s service port Using the hexagonal wrench to press the valve core pin discharge for three seconds and then wait for one minute Repeat this three times ºUse torque wrench to tighten the service port nut Set the 3 way gas side valve to the back seat Mount the valve stem nuts to the 3 way liquid side valve and 3 way gas side val...

Page 45: ... charge hose Open the low pressure valve on the charge equipment slightly to purge air from the charge hose ºSet the 3 way liquid side valve to the closed position Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1 kg cm2g Immediately set the 3 way gas side valve to the closed position Do this quickly so that the gauge ends up indicating 3 to 5kg cm2g Disconnec...

Page 46: ...rench to tighten the flare nut on liquid side valve ŒCheck gas leakage Check the flare connections for gas leakage ºDischarge the refrigerant Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 3 to 5kg cm2g Disconnect the charge set and the gas cylinder and set the 3 way liquid side and 3 way gas side valves to the open position Be sure to use a hexagonal w...

Page 47: ...e set closed Connect the charge hose with the push pin to the service port Ø Open the valve Lo side on the charge set and discharge the refrigerant until the gauge indicates 0 kg cm2g If there is no air in the refrigerant cycle the pressure when the air conditioner is not running is higher than 1 kg cm2g discharge the refrigerant until the gauge indicates 0 5 to 1 kg cm2g In case of this it will n...

Page 48: ...t ŁEvacuation for approximately one hour Confirm that the gauge needle has moved toward 76cmHg vacuum of 4 mmHg or less ØClose the valve Lo side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump ŒDisconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil gets dirty or depl...

Page 49: ... refrigerant If the system can not be charged with the specified amount of refrigerant 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 ŒImmediately disconnect the charge hose from the 3 way gas side valve s se...

Page 50: ...gerant If the system can not be charged with the specified amount of refrigerant 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 ŒImmediately disconnect the charge hose from the 3 way valve s service port Stop...

Page 51: ...lacement of unit if the unit is beyond repair Satisfactory operation with temperature difference of inlet outlet air COOLING 7 10 C HEATING 15 17 C Check heat load rise at cooling operation Unexpected residue Added electrical utensil Check inside gas pressure Adjust refrigerant charge Malfunction of compressor Replacement of compressor Check of cold warm air cir culation for smooth flow Dirty indo...

Page 52: ...r Improper electric heater Replacement of electric heater Regular but fails to start Replacement of compressor Electric heater is not energized Loose terminal connection Improper wiring Irregular motor resistance Ω Irregular motor insulation Ω Replacement of compressor Drop of power voltage Capacitor check Replacement Compressor only fails to start Defect of compressor capacitor Check power source...

Page 53: ...ouble Measure it with a tester in case that the same power source is supplied to other equipment than the unit what and where trouble can be discov ered by checking the operation of other equip ment Measure it with a tester Make short circuit then measure it with a tester Check it with the eyes or tester Check it with the eyes or tester Repair a switch box and is relative instrument Replacement of...

Page 54: ...for compressor motor Compressor motor Compressor High pressure switch Electric circuit Defective contact magnetic coil troubled Troubled over heated layer short Troubled or over heated lock Troubled or defective contact or operating Defective connection or disconnection of the circuit for compressor Check it with the eyes on with a tester Check how it is insulated Groaned noise of motor Check it w...

Page 55: ...an Obstacle Air short circuit 1 Checking Checking In the event that difference between the saturating temperature corresponding to high pressure and the temperature of air discharged from the outdoor coil is more than 15 C incondensable gas may be blended Check it with a pressure gauge Confirm the wind blowing out Check it with eyes Open it properly Wash it by means of something like chemical wash...

Page 56: ... Correct it Correct it Replenish it Repair the leakage spot Correct or clear the foreign bodies Cleaning 9 4 All the functions are performed normally but very noisily and much vibratively WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Compressor Blower Screws Checking Checking Checking Checking Remove the shipping bracket Replace the compressor Repair or replace it Clear the other material Repair Li...

Page 57: ... or excessive air flow through the evaporator coil Refrigerant over charge Faulty discharge valve or suction valve of the compressor Discharge pressure is higher than standard Intake air extremely cold or insufficient air flow through the evaporator coil Refrigerant short charge or leakage Restricted liquid in the suction line 1 Check the operation of the outdoor motor 2 Check discharge and suctio...

Page 58: ...ne and the contactor Check the voltage and phase unbalance Add refrigerant repair leakage if any Check thermistor operation or any other cause for frequent stop and start operation See High Discharge Pressure or High Suction Pressure Check the voltage and phase unbalance Check the power supply line and the contact Check electric resistance among the compressor terminals and from the ter minals to ...

Page 59: ...outunit Pin 1 and Pin 3 of Main P C B ON OFF S W ON Is the unit operating Istheinputpower AC220V AC240V atCOMP Magnetic coil Check the magnetic contactor of outdoor unit Is it Cooling mode Room temp Set temp Is the DC5V at 14 pin of MICOM Replacement IC02M RY COMP Replacement MICOM Room temp set temp setting Select the cooling operation mode Check the wiring diagram ...

Page 60: ...DC12V at each terminal RY Mid Coil Is the DC12V at each terminal RY S High Coil Is the AC220V 240V between C and S High of P C B Is the AC220V 240V between C and High of P C B Is the AC220V 240V between C and Mid of P C B Replacement ICO3M Replacement S High Check the motor winding Replacement High Replacement RY Mid Is the DC12V at each terminal RY High Coil Replacement MICOM and check the EVA Th...

Page 61: ...W ON Is the DC5V at 16 terminal MICOM Is the DC12V at each terminal RY Sync COIL Check the synchronous motor winding Replacement RY Sync Check synchronous connector contact point Is the AC220V 240V at each terminal SYN MOTOR CONNECTOR Replacement ICO2M Replacement MICOM The power ON OFF S W ON Press the Auto Swing S W ...

Page 62: ...e battery of remote controller normal Check the connector CN Disp1 Is the CN Disp1 connector normal Does the operation of remote controller properly Is the Pre amp of display normal Replacement MICOM Replacement preamp assy Replacement remote controller Replacement battery ...

Page 63: ...at Trans input terminal Is the AC12 18V at Trans 2nd Is the connector of Main Display correct Is the DC5V between PIN64 and PIN 32 of MICOM Replacement Main PCB ASM 1 Replacement ICO3D 2 Replacement Main PCB ASM Check the connector of Main Display Replacement Trans 1 Check the electric connections 2 Check the fuse of Main PCB ASM ...

Page 64: ... the DC5V at 18 pin of Micom terminal Is the DC12V at each terminal RY 4way COIL Isthe AC220V AC240V betweenconnec tor 4WAY andCN outunitPin1ofMain P C B Is the DC12V at each terminal Replacement RY 4way Replacement ICO2M Replacement RY Comp IstheAC220V AC240V betweenconnector CN outunit Pin1andPin3ofMain P C B Check the wiring diagram Replacement MICOM Replacement ICO2M Room temp Set temp Setting...

Page 65: ...g Is the Heat S W of Main PCB ON Heat S W ON Replacement MICOM Replacement ICO2M Replacement RY Heater Is the DC 5V at 15 pin of MICOM Is the DC 12V at eack terminal RY Heater COIL Isthe AC220V AC240V between connector HEATER andCN outunitPin1 ofMainP C B Check the heater wiring Select the heating operation mode Compressor ON ...

Page 66: ... 66 10 ELECTRONIC CONTROL DEVICE 10 1 MAIN P C B ASM ...

Page 67: ...67 10 2 DISPLAY P C B ASM CN 2 CN 1 C2 C1 G PRE AMP O V3 J1 J3 J4 J7 J8 J9 J2 A CL PWB 6870AQ2228A ASM 6871AQ3142 LED MODULE ON OFF J5 J6 C4 D3 D1 D2 D4 D6 D5 MODE LOW HIGH SPEED R1 C3 D7 10 3 DE ICE PCB ...

Page 68: ... 68 11 1 Circuit and Troubleshooting 11 SCHEMATIC DIAGRAM ...

Page 69: ... 69 96 99 97 9D 81 89 8F 8C 95 86 91 90 9F CUSTOM CODE 8656 HEX 1000011001010110 BINARY 11 2 Remote Controller FUNCTION DATA CODE HEX FUNCTION DATA CODE HEX ...

Page 70: ...12 1 Indoor Unit 1 Exploded View 70 12 EXPLODED VIEW AND REPLACEMENT PARTS LIST 55 54 53 26 28 30 31 39 36 35 22 16 40 1 40 25 24 52 23 34 32 33 38 37 27 29 17 15 15 20 1 19 13 41 21 20 16 17 20 1 20 18 ...

Page 71: ... 71 6 51 49 47 44 50 14 11 11 1 12 10 10 1 8 9 9 1 9 2 46 42 40 48 5 6 7 49 45 55 43 1 ...

Page 72: ...A 2H01102A 2H01102A 2H01102A 1 32 CONTROLLER ASSY 3545A20004F 3545A20004E 3545A20004H 3545A20004G 3545A20004K 1 33 BODY DISPLAY 3071AP2292K 3071AP2292K 3071AP2292K 3071AP2292K 3071AP2292K 1 34 WINDOW DISPLAY 3790AP3936N 3790AP3936P 3790AP3936N 3790AP3936P 3790AP7356B 1 35 KNOB 4940A30006A 4940A30006A 4940A30006A 4940A30006A 4940A30006A 1 35 1 KNOB 4940A30006B 4940A30006B 4940A30006B 4940A30006B 49...

Page 73: ...01102A 2H01102A 2H01102A 1 32 CONTROLLER ASSY 3545A20004J 3545A20004F 3545A20004E 3545A20004H 3545A20004G 1 33 BODY DISPLAY 3071AP2292K 3071AP2292K 3071AP2292K 3071AP2292K 3071AP2292K 1 34 WINDOW DISPLAY 3790AP7327S 3790AP3936N 3790AP3936P 3790AP3936N 3790AP3936P 1 35 KNOB 4940A30006A 4940A30006A 4940A30006A 4940A30006A 4940A30006A 1 35 1 KNOB 4940A30006B 4940A30006B 4940A30006B 4940A30006B 4940A3...

Page 74: ...1 SYN MOTOR 2H01102A 2H01102A 2H01102A 2H01102A 2H01102A 1 32 CONTROLLER ASSY 3545A20004F 3545A20004E 3545A20004H 3545A20004G 3545A20004F 1 33 BODY DISPLAY 3071AP2292K 3071AP2292K 3071AP2292K 3071AP2292K 3071AP2292K 1 34 WINDOW DISPLAY 3790AP3936N 3790AP3936P 3790AP3936N 3790AP3936P 3790AP3936N 1 35 KNOB 4940A30006A 4940A30006A 4940A30006A 4940A30006A 4940A30006A 1 35 1 KNOB 4940A30006B 4940A30006...

Page 75: ...1947A 3A01947A 3A01947A 1 31 SYN MOTOR 2H01102A 2H01102A 2H01102A 1 32 CONTROLLER ASSY 3545A20004E 3545A20004H 3545A20004G 1 33 BODY DISPLAY 3071AP2292K 3071AP2292K 3071AP2292K 1 34 WINDOW DISPLAY 3790AP3936P 3790AP3936N 3790AP3936P 1 35 KNOB 4940A30006A 4940A30006A 4940A30006A 1 35 1 KNOB 4940A30006B 4940A30006B 4940A30006B 1 35 2 KNOB 4940A30006C 4940A30006C 4940A30006C 1 35 3 KNOB 4940A30006D 4...

Page 76: ... 76 12 2 Outdoor Unit 1 Exploded View 29 24 12 9 11 23 22 32 1 6 26 7 25 28 27 30 5 18 13 16 19 8 17 15 2 3 4 31 39 10 36 38 39 37 35 34 33 14 21 20 40 ...

Page 77: ...9A20001C 4849A20001C 4849A20001C 4849A20001C 1 20 VALVE CORE ASSY 3A01902A 3A01902A 3A01902A 3A01902A 1 21 H P SWITCH 3A01100A 3A01100A 3A01100A 1 22 BAFFLE 4760AP1216A 4760AP1216A 4760AP1216A 4760AP1216A 1 23 MOUNT 4960AP1214A 4960AP1214A 4960AP1214A 4960AP1214A 1 24 MOTOR ASSY 4680AP2135M 4680AP2135M 4681AP2666B 4681AP2666B 2 25 EXTRA FAN 1A00195B 1A00195B 1A00195B 1A00195B 2 26 PANEL REAR 3720A...

Page 78: ...4849A20001C 4849A20001C 4849A20001C 4849A20001C 1 20 VALVE CORE ASSY 3A01902A 3A01902A 3A01902A 3A01902A 1 21 H P SWITCH 3A01100A 3A01100A 1 22 BAFFLE 4760AP1216A 4760AP1216A 4760AP1216A 4760AP1216A 1 23 MOUNT 4960AP1214A 4960AP1214A 4960AP1214A 4960AP1214A 1 24 MOTOR ASSY 4681AP2666B 4681AP2666B 4681AP2666B 4681AP2666B 2 25 EXTRA FAN 1A00195B 1A00195B 1A00195B 1A00195B 2 26 PANEL REAR 3720AP1202C...

Page 79: ...P NO 3828A30074N Printed in Korea ...

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LG LP-E5020CL, Service Manual

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