LG LRTLS2403S Service Manual Download Page 45

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10) Cooling BLDC FAN Motor Error

Checking flow

Result & SVC Action

airflow

No airflow

Go to the 4
Go to the 3

Status

SVC Action

8~15 Vdc

Below 1V or 16V

Normal

Change the PCB

SVC Action

1~4 Vdc

Other

Normal

Change the PCB

Status

SVC Action

Push the TEST Mode Check the

loose connection
Input Test 1 Mode.

(push the button 1 times)

It feel stuck or locked up, change the

motor.

Check the Fan motor rotate in machine

room. (While an error code is displayed,

the fan is not working)

Check the FAN Motor Voltage in wires

Red to Black.

COLDEST

COLD

reservados. Solo para propósitos de entrenamiento y servicio.

Summary of Contents for LRTLS2403S

Page 1: ...cation copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes without limitation any text graphics or logos in this Service Manual Copyright 2021 LG Electronics Inc All rights reserved Only training and service ...

Page 2: ...he sharp evaporator fins 9 Service on the refrigerator should be performed by a qualified technician Sealed system repair must be performed by a CFC certified technician WARNINGS AND SAFETY PRECAUTIONS 1 SPECIFICATIONS 2 PARTS IDENTIFICATION 3 DISASSEMBLY 4 TROUBLE SHOOTHING 4 1 Compressor activation defect 4 2 Another electric components 4 3 Service Diagnosis Chart 5 COMPRESSOR 6 CIRCUIT DIAGRAM ...

Page 3: ...Spiral or Wire Condenser Lubricanting Oil 115V 60Hz Drier MOLECULAR SIEVE XH 9 Capillary Tube ID Ø 0 75 First Defrost 4 Hours Defrost Cycle 7 40 Hours Defrosting Device Heater Sheath Anti freezing Heater Water Tank Heater Case Material Embo Normal Door Material Stainless Handle Type Pocket Handle Basket Quantity 2 full 1 Dairy Ice Tray Bank No Cover T V Humidity Control Lamp LED 1 Shelf Glass 2 Tr...

Page 4: ...listed below The locations of the features shown below may not match your model Freezer Shelf Freezer Temperature Control Refrigerator Temperature Control Shelves Refrigerator Light LED Crispers Freezer Door Bins Dairy Bin Refrigerador Door Bins On Some Models A A G H I B C D E F B C D E F G H I Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y...

Page 5: ...r hinge Remove the top hinge cover by gently prying it with a flat head screwdriver the three bolts and lift off the top hinge Set parts aside Electrical Shock Hazard before installing Failure to do so could result in serious injury or death injured or receive an electrical shock REMOVING THE REFRIGERATOR DOOR Loosen and remove the two bolts using a phillips head screwdriver Remove the middle hing...

Page 6: ...nd door to the refrigerator housing Set the freezer door onto the Middle Hinge pin Place the upper hinge pin in the top of the freezer door and line up the upper hinge with the holes on top of the refrigerator Use the three bolts to replace the hinge Carefully force fit the top hinge cover back into place over the hinge Remove food and any Adjustable Shelves or Door Bins from doors Failure to do s...

Page 7: ...t side of the bracket Reverse the Door Closer Stop by flipping it over Place it on top of the Hinge Pin Insert Bracket and tighten both down with the screw Pry off the cover on the top left side of the refrigerator to uncover the screw holes Set the freezer door and top hinge parts to the side and remove the refrigerator door REVERSING THE REFRIGERATOR DOOR Using a 1 4 in socket wrench loosen and ...

Page 8: ...using Fig 21 Remove the Decorative Caps on the bottom of the refrigera tor housing You will need these holes for the Bottom Hinge Move the Bottom Hinge to the left side of the housing keeping the same orientation and reattach with the two bolts and one screw The flat screw must be placed on the exterior side of the hinge Move the Decorative Bolt to the hole on the lower right side of the housing T...

Page 9: ...ge Pin stays in the same orientation with its hexagonal end facing upward Insert the Decorative Screw into the outer hole on the right side of the housing Attach cover on the right side Cover is force fitted Fig 29 Fig 30 Middle Hinge Bracket Flange Fig 31 Decorative Screw Fig 32 Fig 33 Fig 34 Fig 35 Cover on top of refrigerator Fig 36 REATTACHING THE DOORS Place the freezer door down over the Hin...

Page 10: ...e inclination you would like NOTE Having someone push against the top of the refrigerator takes some weight off the leveling screws This will make it easier to adjust the screws 3 Open both doors again and check to make sure that they close easily If not tilt the refrigerator slightly more to the rear by turning both Leveling Screws clockwise It may take several more turns and you should turn both...

Page 11: ...r RESET after checking the voltage on COMP side 3 4 2 Open back cover 2 Check wheter C Fan 3 operates 1 CHECK COMP and Discharge PIPE temperature Check the number of LED blinking Refer to the next chapter for actions for each number of LED blinking If COMP is normal it will not blink Test mode bu on Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamien...

Page 12: ...operation Check Comp Check C Compressor SVC Manual 1 Check LED Trip 1 Separate PCB COVER and check number of LED blinking 2 Verify the actions for each number of blinking Check when it is not RESET Before turning off the power of the refrigerator 3 Write the service information according to the number of LED blinking 4 Write SVC information and check again after power reset Refer to the actions fo...

Page 17: ...wing components Def Sensor FUSE M Check current flowing of the following components Heater plate Heater cord Fan motor doesn t run Much frost are sticked to the EVAPORATOR Replace each component Replace each component Replace each component Cooling ability is poor Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 16 ...

Page 18: ... the chamber of the set set SERVICE ACTION POINTS TO CHECK COMPLAINT Check if the set is placed close to stove gas cooker and direct rays Is the ambient temperature high or the room door closed Check if putting in hot foods foods Did you open the door of the set too often or check if the door is closed up Check if the Control is set in the 1st LED Check if ambient temperature and humidity of surro...

Page 19: ... Compressor connector and check the locking status of the terminal at D point in the figure If it is normal check the contact status of O L P fixed inside Cover PTC The problem in O L P may be judged by the resistance values at both ends of O L P If both ends of O L P are measured and the resistance value shows 5 or less it is normal If the resistance value is big it may be judged as O L P disconn...

Page 20: ...must be more than 12 16Kg cm2 2 Temperature must be more than 20 70 C 3 Keep the pressure to 12 6Kg cm2 also when substituting dry air for Nitrogen Gas 1 Check if gas leaks with soapy water 2 Replace Quick Coupler in case of leakage Put all Joint Pipe in a clean box and cover tightly with the lid so that dust or humidity is not inserted Recommend H34 containing 34 Ag in the Service Center Make amo...

Page 21: ...FUSIBLE M DEF HEATER RESISTENCIA DE DESHIELO ICE VALVE VALVULA DE HIELO A C D B EARTH PART TIERRA CON5 CON6 M F FAN MOTOR M C FAN MOTOR CON11 PWB ASSEMBLY SMART BUZZER CON1 DIAGNOSTICO INTELIGENTE DISPENSER S W INTERRUPTOR DE DISPENSADOR CON8 RT SNR SENSOR RT R SNR SENSOR R D SNR SENSOR D R DOOR S W F DOOR S W R LED F LED E F G H INTERRUPTOR PUERTA R INTERRUPTOR PUERTA F ENSAMBLE PCB DISPLAY ICE M...

Page 22: ...measure voltage between T erminal C of compressor and terminal 5 or 6 of PTC Check resistance of two terminals in OLP Check the power supply under load Compressor attempting to re start after being off for 5 minutes Check OLP Check starting state Check resistance of motor compressor Check the resistance between M C S C and M S in motor compressor Replace compressor Check resistance of motor compre...

Page 23: ...poor Separate OLP from Compressor and check resistance value between two terminals of OLP with a T ester Figure 2 Check another electric component Replace OLP Figure 1 Figure 2 Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 22 ...

Page 24: ...ise customer that the Power supply needs to be checked by an electrician Replace indicated component Cause Check voltage at starting devices Check current flowing in sub coil of Compressor Check rating of OLP Fan motor doesn t run Heavy frost buildup on EVAPORATOR Wire is open or shorted Coil is shorted or open Open Open Replace Defrost Heater Replace indicated component Replace indicated componen...

Page 25: ...2 Condenser coils blocked 2 Check air flow across condenser 3 Evaporator fan motor not operating 3 Check evaporator fan motor and wiring circuit 4 Internal air flow blocked 4 Check air ducts 5 Sensor not operating properly 5 Check refrigerator and freezer sensors 6 Door not sealing 6 Check for proper door seal 7 Evaporator frosted up 7 Check defrost circuit components 8 Sealed system related probl...

Page 26: ... frost forms in inlet only temperature refrigerant level NO COMP No compressing RESSION operation is not heard and there is temperature pressure part of the no frost compressor CAUSE TEMPERATURE OF THE COMPRESSOR REMARKS STATE OF THE UNIT STATE OF THE EVAPORATOR LEAKAGE RESTRICTEDBYDUST DEFECTIVE COMPRESSION Check sealed system for leak Check if compressor runs If don t wait a while until it start...

Page 27: ... ERROR indicators in table can be checked only in TEST mode 1 2 3 4 5 6 HEATER MOTOR HALL IC TRAY SOLENOID VALVE HALL IC LEVER Reset Five seconds after heater starts heater will go off if temperature recorded by sensor is 10 C or lever is in up position Five seconds after heater starts you can confirm that motor is moving You can confirm Hall IC detection of position Two seconds after detection of...

Page 28: ... the 50 F 10 C in 1 hour the defrost mode is malfunctioning Refer to the defect diagnosis function Defrosting won t function if the sensor if defective wires are cut or short circuited 9 1 3 Electrical Parts Operation in Sequence Electrical parts such as COMP defrost heater freezer FAN etc Operate in the following order to prevent noise and parts damage Several parts are started at the same time a...

Page 29: ... hours the defrost mode is malfunctioning 4 Defrosting won t function if its sensor is defective wires are cut or short circuited The electric components such as the comp defrosting heater and cooling fan start sequentially to avoid the noise and damage to the part which may result from the simultaneous start of various components on turning the power on or after the completion of a test OPERATING...

Page 30: ...uld be locked If there s no motor signal motor could be locked 9 1 10 Lock Function 1 On initially operation the Lock Function is OFF 2 If you wish lock the Water Dispenser push on the WATER LOCK button after this the WATER LOCK LED on the Display will be turned ON 3 If you wish unlock the Water Dispenser press the WATER LOCK button Then the WATER LOCK LED on the Display will Be turned OFF 1 11 Fi...

Page 31: ... the error code is displayed 6 While an error is detected the test mode will not be activated even if the test button is pushed 1 Comp OFF 2 Freezer fan OFF 3 Defrosting heater ON 4 Temperature display part show as bellows Reset if the temp of the defrosting sensor is 10 C or above LED Check Mode When the ADJUST TEMP button is pushed and held together for 1 sec or longer every LED on the display t...

Page 32: ...rk 7 Refrigerator Room LED Module doesn t work 8 Poor cooling in Refrigerator room 9 Over cooling in Refrigerator room 10 Freezer BLDC FAN Motor Error 11 Cooling BLDC FAN Motor Error 1 Temperature compensation 2 TEST MODE and Removing TPA 3 TEMPERATURE CHART REF AND DEFROST SENSOR 4 TEMPERATURE CHART RT SENSOR CONTENTS Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propó...

Page 33: ...isplay PCB CON 8 Sensors LED Lightning and door switch CON 10 CON 202 Programming Port CON 7 Touch Display PCB CON 9 Ice Maker twisting CON8 CON11 CN1 CON6 CON5 CON201 CON1 CON102 CON8 CON11 CON6 CON5 CN1 CON 102 CON 101 CON1 CON201 CON202 CON10 CON102 OLP CON101 Reactor l Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 32 ...

Page 34: ... PCB Picture PCB PJT QT 20 24 CU 100 127V Power Cord PJT Plug A2 127V 115V P N EBR807574 P N EAD61445253 Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 33 ...

Page 35: ...PLAY PCB LED Lighting Basic Models Tact and Inner Display Dispenser Models Tact and Inner Display P N EAV61573112 R Room Right Lefth LED Module Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 34 ...

Page 36: ...129 3 99 30 76 96 60 13 47 34 37 55 30 24 13 19 53 15 91 13 03 10 74 8 89 7 40 6 20 VOLTAGE 4 48 V 4 33 V 4 641 V 4 54 V 4 425 V 4 287 V 4 128 V 3 948 V 3 75 V 3 535 V 3 307 V 3 070V 2 829 V 2 589 V 2 354 V 2 128V 1 914 V Check for loose connection in CON8 2 1 Unplug connector from CON8 2 Check resistance in wires Brown to Brown 3 Plug in CON8 check voltage in wires Brown to Brown and check voltag...

Page 37: ... they are open between the main PCB and connector it will be necessary to replace the refrigerator Check the Temp and resistance Table 1 Result SVC Action Check for loose connection in CON8 2 1 Unplug connector from CON8 2 Check resistance in wires White to White Firmly plugged Loose Go to step 2 Plug firmly then check again Problem persist YES Go to step 2 NO Explain to customer Result SVC Action...

Page 38: ...e Temp and resistance Table 2 Result SVC Action 1 Check for loose connection in CON8 No Checking flow Result SVC Action 2 1 Unplug connector from CON8 2 Check resistance in wires Orange to Orange 3 Check for loose connection in evaporator heater connector 4 1 Unplug evaporator heater connector 2 Check resistance in wires Orange to Orange Firmly plugged Loose Go to step 2 Plug firmly then check aga...

Page 39: ... PCB 1 Check th No Checking flow Result SVC Action e Door Gasket 2 Check the Defrost control part Fuse M Defrost Heater 3 Input Test 2 Mode Push the button 2 times 4 Check voltage in wires Brown to White in connector CN1 5 Release the test mode Push the button 1 times normal 6 COLDEST COLD 52 58 44 50 Check voltage in wires Brown to White in connector CN1 69 78 Ω Copyright 2021 LG Electronics Inc ...

Page 40: ... If there is not continuity go to step 3 Door Magnetic Switch Status Result SVC Action Status Result SVC Action Normal Infinity Resistence Place the magnet near to the magnetic switch 0 Disconnect the magnetic switch and confirm if continuity between the terminals exists or not Is there continuity when you close magnetic switch with the magnet placed on the door NOTE For detecting continuity the m...

Page 41: ...ormal Change the PCB Status Result SVC Action 4 No Checking flow Result SVC Action 1 Unplug connector from CON8 2 Check resistance in wires Gray to Gray 5 Plug in CON8 check voltage in wires Gray to Gray 6 Check voltage in wires from CON8 Red to Black 7 Check voltage in Refrigerator LED Connector Open Closed 12 V Other 0 V Other Change Freezer LED Change the PCB Normal Change the PCB Status Result...

Page 42: ...ction Go to the 4 Check the Fan motor Next page Status Cold Not cold SVC Action Normal Check the Compressor And sealed system 4 Check the air temperature Cold or not 1 1 Unplug connector from CON8 2 Check resistance in wires White to White Release Motor Point Result SVC Action 5 Check the Fan motor Rotate fan using your hand It feel sticky change the motor cause of ice or rust inside of motor Chec...

Page 43: ... Action Temperature 23 F C 32 F C 41 F C 50 F C 59 F C Result 38 30 24 19 5 16 Status Windy No windy SVC Action Go to the 4 Check the PCB Status Windy No windy SVC Action Change the PCB It s normal 4 Input Test 2 Mode and Check the air flow push the button 1 time 1 1 Unplug connector from CON8 2 Check resistance in wires White to White Copyright 2021 LG Electronics Inc Todos los derechos reservado...

Page 44: ...n Input Test 1 Mode push the button 1 times 2 Open the freezer door and Check the Air 3 Check the Fan Motor Rotate the fan using your hands flow While an error code is displayed the fan is not working It feel stuck or locked up change the motor 4 Check the FAN Motor Voltage in wires Brown to Blue Status COLDEST COLD Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósit...

Page 45: ...s SVC Action 1 Push the TEST Mode Check the loose connection Input Test 1 Mode push the button 1 times It feel stuck or locked up change the motor 2 Check the Fan motor rotate in machine room While an error code is displayed the fan is not working 4 Check the FAN Motor Voltage in wires Red to Black COLDEST COLD Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de...

Page 46: ...ire on the Main PCB CUT OPTION Temperature compensation Over cooling compensation Poor cooling compensation JCR1 JCR2 JCR3 JCR4 Refrigerator Room 3 Reference JCR1 cuts 1 JCR2 cuts 1 JCR3 cuts 1 JCR4 cuts 1 Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 45 ...

Page 47: ...time Comp ON F fan ON Defrost Heater OFF Display ALL ON 2 times Comp OFF F fan OFF Defrost Heater ON 2 displayed Main PCB AC TPA DC TPA 2 TEST MODE and Removing TPA All LED turn on TEST MODE 2 After measure the values you should put in the TPA again Copyright 2021 LG Electronics Inc Todos los derechos reservados Solo para propósitos de entrenamiento y servicio 46 ...

Page 48: ...er Infinity Other Go to the 5 Go to the 4 Go to the 5 Go to the 4 Status Result SVC Action Normal Push S W 0 Other Infinity Other Go to the 5 Go to the 5 Change the dispenser switch Status Result SVC Action Change the dispenser switch Firmly plugged Loose Go to step 2 Plug firmly then check again Problem persist YES Go to step 2 NO Explain to customer Result SVC Action Pressing Not pressing Go to ...

Page 49: ...l Replace Water Valve It s normal Replace Water Valve Point Result SVC Action 1 2 3 4 Ice Maker Dispenser 7 Check the resistence value Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 6 Change PCB Go to the 6 Change PCB Lever s w Result SVC Action Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 7 Change PCB Go to the 7 Change PCB Lever s w Result SVC Action Copyright 2021 LG Ele...

Page 50: ...8A 282E 501F 411A S01 304A 282B S13 282H 283B 105A 318A 323B 420A 405G 405D 329C 319D 319F 106A 305B 305C 315A 305C 305B 317A 120A 158C 120E B01 S38 501A 311A 611A 406B 410A 279A 501B 120B 503G CAUTION Use the part number to order part not the position number EV ...

Page 51: ...FREEZER PARTS CAUTION Use the part number to order part not the position number 405C 404A 319E 330B S01 332A 329A 110D 284A EV 405F 149F S16 332B 404Z 284B 282X 284E ...

Page 52: ...REFRIGERATOR PARTS CAUTION Use the part number to order part not the position number 143A EV 143A 167B 151A 151A 154A 151D 151C 155B ...

Page 53: ...DOOR PARTS CAUTION Use the part number to order part not the position number 241A 230A 231A 233A 281E 241C 241C EV 286A 205A 205A 200A 201A 203A 212G 286A 210B 210C 210A 243B ...

Page 54: ...ICE MAKER PARTS CAUTION Use the part number to order part not the position number EV 279B 615A 616D 616G 617B S25 S12 S12 621D 280F 402C 611B 619D 627E S18 120F 625A 623C 619A S01 611A ...

Page 55: ...PN MFL71772732 JULY 2021 ...

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