LG LRTLS2403S / 00 Service Manual

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REFRIGERATOR

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic

means), publication, modification, 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.

MODELS:

LRTLS2403S / 00

CONFIDENTIAL

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Questions and answers

Daniel Gay

February 20, 2025

Model LRTLS2403S not staying on the coldest setting. We have the fridge in a clinical setting and need tight temperature control. When I hold the temperature adjust button and then click it to the coldest setting, it will later revert back to having only the last 3 lights green and first 2-3 off. This is too warm and is setting off our alarms.

1 comments:

Mr. Anderson

February 20, 2025

The LG LRTLS2403S refrigerator may not be maintaining the coldest temperature setting due to several possible reasons:

1. Blocked Air Vents – If the air vents are blocked, cold air cannot circulate properly.
2. Frequent Door Openings – Opening the doors often allows warm ambient air inside, affecting the temperature.
3. Improper Door Closure – If the doors are not closing properly, cold air escapes, preventing the refrigerator from maintaining the set temperature.
4. Incorrect Control Settings – If the temperature settings are too high, the refrigerator will not stay as cold as desired.
5. Sensor Issues – A faulty temperature sensor or loose connection in CON8 could affect temperature regulation.

Solutions include ensuring air vents are clear, minimizing door openings, checking door seals, adjusting temperature settings incrementally, and verifying sensor connections.

This answer is automatically generated

Summary of Contents for LG LRTLS2403S / 00

Page 1 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.
Page 2: Table Of Contents
This may cause frost bite. must be performed by a CFC certified technician. 6. Prevent water from spiling on to electric elements or the machine parts. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 3: Specifications
Ice Tray & Bank Cover, T/V Humidity Control Lamp LED (1) Shelf Glass (2) Tray meat Tray egg Basket, Quantity Plastic (2) Lamp Shelf Glass (1) Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 4: Parts Identification
Freezer Shelf Freezer Door Bins Freezer Temperature Control Dairy Bin Refrigerator Temperature Control Refrigerador Door Bins Shelves Refrigerator Light (LED) *On Some Models Crispers Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 5: Disassembly
Fig. 6 Carefully lift up the freezer door. Place the door on a non- scratching surface. Middle Hinge Bracket Hinge Pin Fig. 3 Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 6 Top Hinge refrigerator. Use the three bolts to replace the hinge. Fig. 13 Fig. 10 Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 7 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. Fig. 17 Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 8 Hinge Pin Bracket to the door. remove the Bottom Hinge from right side of the housing. Fig. 24 Hinge Pin Bracket Hinge Pin Insert Fig. 28 Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 9 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. Decorative Screw Fig. 32 Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 10 Leveling Screws clockwise. It may take several more turns, and you should turn both Leveling Screws the same times. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 11: Compressor Activation Defect
If COMP & FAN are not operated at the same time, check the operation after forcing the operation in TEST MODE in MAIN PCB, and perform power RESET after checking the voltage on COMP side. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 12 (Check C) Heavy repair Leakage? Replace Comp. Check again Is Comp in Replace PCB operation? Check Comp. (Check C) Heavy repair Leakage? Check again Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 17: Another Electric Components
EVAPORATOR. components. Def. Sensor FUSE-M Check current flowing Replace each of the following component. components. Heater plate Heater cord Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 18: Service Diagnosis Chart
Check if dew forms Defrosting is components of in the freezer. poor. defrosting circuit. Check refrigerator The cycle is Repair the cycle. Cycle. faulty. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 19: Compressor
2. If the resistance is not correctly measured, you may have wrong judgment. (The resistance value may have differences of several ) 14Ω ±10% BMG1110NHMV Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 20 Put all Joint Pipe in a clean box and PIPE cover tightly with the lid so that dust or humidity is not inserted. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 21: Circuit Diagram
SMART BUZZER/ EARTH DIAGNOSTICO PART/ INTELIGENTE TIERRA CON1 CON11 /FUSIBLE - M /INTERRUPTOR DE ENCENDIDO F-ROOM LED MODULE R-LED Module MODULO LED - F Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 22: Compressor And Electric Components
OK (Compressor attempting with ±10%. to re-start after being off Replace the for 5 minutes). compressor Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 23: Ptc And Olp
Open of OLP with a T ester. Replace OLP . (Figure 2) Figure 2 Figure 1 Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 24: Other Electric Components
Check current flow in Open. indicated component. the following EVAPORATOR. components: Sensor Fuse-M Check current flow in Replace Open. the Defrost Heater. Defrost Heater. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 25: Service Diagnosis Chart
Not defrosting 1. Freezer has too much frost 2. Check sensor 2. Defrost sensor not operating correctly 3. Check drain 3. Defrost drain clogged Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 26 Repair it. (check correct quantity) Frost formed Frost formed Moisture restriction. No frost normally Replace normally intermittent problem. normally Compressor Finished OK Restriction Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 27 HALL IC/MOTOR/ park position over 18 minutes after malfunction HEATER/RELAY harvest mode starts. ERROR indicators in table can be checked only in TEST mode. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 28 COMP, COMP, 0.5 Sec 0.5 Sec F-FAN F-FAN ( ON : / OFF : Temp Medium/ Medium/ Medium High Control Mode High TEMP(°C) Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 29 (NOTE) All of the errors except room temperature sensor error are displayed only after 3 hours after sensing the error. To check if an error has occurred before 3 hours have passed, press and hold down TEMP AJUST button. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 30 OFF. 4. If the power OFF the data will be save in the memory (Power saving mode). Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 31 Note: If door is opened within the first 5 minutes from power on the demonstration mode, it will be released and set at middle level automatically. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 32 1) Temperature compensation 2) TEST MODE and Removing TPA 3) TEMPERATURE CHART - REF AND DEFROST SENSOR 4) TEMPERATURE CHART - RT SENSOR Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 33 - CON 10,CON 202 : Programming Port - CON102: OLP - CON101 : Reactor Optional Connectors - CON 7 : Touch Display PCB - CON 9: Ice Maker twisting Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 34 1-1. MAIN PCB Part Name Picture P/N: EBR807574** PCB PJT QT 20/24 CU (100-127V) P/N: EAD61445253 Power Cord PJT Plug A2 (127V, 115V) Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 35 P/N: EBR59400502 Basic Models Tact and Inner Display P/N: EBR59400503 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.
Page 36 68°F (+20°C) 13.03 2.829 V 77°F (+25°C) 10.74 2.589 V 86°F (+30°C) 8.89 2.354 V 95°F (+35°C) 7.40 2.128V 104°F (+40°C) 6.20 1.914 V Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 37 23°F °C 32°F °C 41°F °C 50°F °C 19.5 59°F °C The sensor is determined by the temperature. For example, 30 indicates 32°F. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 38 1.- Unplug evaporator heater connector . The sensor is determined by 2.- Check resistance in wires Orange to the temperature. Orange. For example, 30 indicates 32°F. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 39 Push the button 1 times. (normal) Check voltage in wires Brown to White in connector CN1 Result SVC Action Nomal 115VAC ± 10VAC Replace Main PCB Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 40 If there is continuity, go to step 4. NOTE: For detecting continuity, the magnet and switch magnetic must be aligned. Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 41 Check voltage in Refrigerator LED Connector Status Result SVC Action 12 V Change Freezer LED Open Other Change the PCB Normal Closed Other Change the PCB Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 42 It feel sticky, change the motor. (cause of ice or rust inside of motor) Motor Release Check section Cooling BLDC Fan Motor Error Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 43 Input Test 2 Mode and Status SVC Action Check the air flow. (push the button 1 time) Windy Change the PCB No windy It ’s normal Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 44 Check the FAN Motor Voltage in wires Brown to Blue. SVC Action Status 8~15 Vdc Normal Below 1V or 16V Change the PCB Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 45 Red to Black. SVC Action 8~15 Vdc Normal Below 1V or 16V Change the PCB Status SVC Action 1~4 Vdc Normal Other Change the PCB Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 46 Poor cooling compensation JCR4 * 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.
Page 47 2. How to remove Terminal Position Assurance (TPA) <AC TPA> <DC TPA> * 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.
Page 48 3.- Check resistance in switch Go to the 5 Normal Other Change the dispenser switch Infinity Go to the 5 Push Other Change the dispenser switch Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 49 It’s normal 330\ ~ 390 \ (3) to (4) Replace Other Water Valve Dispenser Ice Maker <Pilot Valve> <Water Valve> Machine Room In door Copyright © 2021 LG Electronics Inc. Todos los derechos reservados. Solo para propósitos de entrenamiento y servicio.
Page 50 #EV# CAUTION: Use the part number to order part, not the position number 103B 401A 301A 281A 281B 103B 501F 282E 611A 418A 311A 411A 282B 501A 304A 406B 282H 120A 158C 120E 410A 279A 501B 120B 105A 317A 318A 503G 314A 327A...
Page 51 #EV# FREEZER PARTS CAUTION: Use the part number to order part, not the position number 405F 332A 330B 405C 319E 404A 110D 332B 329A 404Z 282X 284A 284B 284E 149F...
Page 52 #EV# REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number 143A 143A 167B 154A 151C 151D 155B 151A 151A...
Page 53 #EV# DOOR PARTS CAUTION: Use the part number to order part, not the position number 200A 201A 203A 212G 205A 286A 205A 210B 210A 230A 241A 233A 231A 281E 241C 241C 286A 210C 243B...
Page 54 #EV# ICE MAKER PARTS CAUTION: Use the part number to order part, not the position number 611B 615A 627E 616D 619D 120F 617B 402C 616G 621D 280F 611A 279B 625A 623C 619A...
Page 55 PN: MFL71772732 JULY 2021...

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