LG LMXS28596 Series User Manual

CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
REFRIGERATOR
SERVICE MANUAL
CONFIDENTIAL
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,
modification, copying or transmission of this Service Manual is STRICT Y 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 prohi-
bition includes, without limitation, any text, graphics or logos in this Service Manual.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
MODEL : LMXS28596*
COLOR : BLACK STAINLESS(D)
STAINLESS(S)

LG LMXS28596 Series Specifications

General

Brand	LG
Model	LMXS28596 Series
Category	Refrigerator
Language	English

Summary

SAFETY PRECAUTIONS

SPECIFICATIONS

DIMENSIONS

Physical dimensions of the refrigerator.

PARTS IDENTIFICATION

Refrigerator Interior

Illustration of interior components.

DISASSEMBLY PROCEDURES

Removing Refrigerator Door

Step-by-step guide to remove the refrigerator door.

DOOR PROCEDURES

Mullion Removal

Steps to remove the door mullion.

Door Gasket Replacement

Steps to replace the door gasket.

SUB PCB REPLACEMENT

Sub, PCB Removal

Steps to remove the sub PCB.

COMPONENT REPLACEMENT

FAN AND FAN MOTOR (EVAPORATOR)

Steps to replace the evaporator fan and motor.

DEFROST CONTROL ASSEMBLY

Procedures for the defrost control assembly.

LAMP REPLACEMENT

Refrigerator Compartment Lamp

How to replace the refrigerator compartment lamp.

Cap Decor LED LAMP (Bottom)

How to replace the cap decor LED lamp.

PCB REPLACEMENT

MAIN PWB

Procedures for the main PCB replacement.

DISPLAY PCB

Procedures for the display PCB replacement.

ICEMAKER REPLACEMENT

CAP DUCT MOTOR REPLACEMENT

ICE BIN HANDLING

HOW TO REMOVE A ICE BIN

Steps to remove the ice bin.

PULLOUT DRAWER HANDLING

REMOVE AND REINSTALL THE PULLOUT DRAWER

Procedures for removing and reinstalling the pullout drawer.

WATER VALVE & FAN MOTOR PROCEDURES

WATER VALVE DISASSEMBLY METHOD

Method to disassemble the water valve.

DRAWER REMOVAL

VEGETABLE BOX HANDLING

ADJUSTMENT PROCEDURES

COMPRESSOR PROTECTION LOGIC

Explanation of the compressor protection logic.

CIRCUIT DIAGRAM

TROUBLESHOOTING

ERROR CODE SUMMARY

Summary of error codes and their meanings.

PCB IDENTIFICATION

Main PCB

Picture and identification of the Main PCB.

Display PCB

Picture and identification of the Display PCB.

PCB IDENTIFICATION

Sub PCB

Picture and identification of the Sub PCB.

SENSOR ERROR TROUBLESHOOTING

Freezer Sensor Error (FS E)

Troubleshooting steps for Freezer Sensor Error.

Refrigerator Sensor Error (rS E)

Icing Sensor Error (IS E)

Defrost Sensor Error (dS F)

Ice Maker Motor Error (It E)

Defrost Heater Error (dH F)

Freezer Fan Error (FF E)

Icing Fan Error (IF E)

Condenser Fan Error (CF E)

Communication Error (CO E)

MODE MALFUNCTION TROUBLESHOOTING

Cube Mode Malfunction

Troubleshooting steps for Cube mode not working.

Crush Mode Malfunction

Water Mode Malfunction

LAMP MALFUNCTION TROUBLESHOOTING

Refrigerator Room Lamp Malfunction

Troubleshooting steps for refrigerator room lamp not working.

Freezer Room Upper Lamp Malfunction

COOLING PERFORMANCE ISSUES

Poor Cooling in Fresh Food Section

Troubleshooting steps for poor cooling in the fresh food section.

Poor Cooling in Freezer Compartment

Over Cooling in Freezer Compartment

HEATER MALFUNCTION TROUBLESHOOTING

Home Bar Heater Malfunction

Troubleshooting steps for Home Bar heater not working.

GID Heater Malfunction

FAN MALFUNCTION TROUBLESHOOTING

Hygiene Fan Malfunction

Troubleshooting steps for Hygiene fan not working.

WI-FI MODEM MALFUNCTION

Wi-Fi Modem Malfunction

Troubleshooting steps for Wi-Fi modem not working.

REFERENCE INFORMATION

TEST MODE AND TPA

How to enter TEST MODE and remove TPA.

TEMPERATURE SENSOR CHARTS

FRZ AND ICING SENSOR CHART

Temperature and resistance chart for sensors.

REF AND DEF SENSOR CHART

FAN ERROR CHECK

COMPONENT TESTING INFORMATION

Defrost Controller Assembly Testing

Testing the defrost controller assembly.

Sheath Heater Testing

Door Heater Assembly Testing

Dispenser DC Motor Testing

Damper Testing

Flow Sensor Testing

COMP OPERATION ERROR LED CHECK

TROUBLESHOOTING FLOW CHARTS

SIMPLE CHECK FLOW CHART

Simple flow chart for checking LED error codes.

LED BLINKING AND TRIP PROTECTION LOGIC

FCT0 TRIP AND LED BLINKING 1 TIME

Steps for FCT0 trip and LED blinking 1 time.

LED BLINKING AND TRIP PROTECTION LOGIC

STROKE TRIP AND LED BLINKING 2 TIMES

Steps for stroke trip and LED blinking 2 times.

LED BLINKING AND TRIP PROTECTION LOGIC

NO CONNECTION TRIP AND LED BLINKING 3 TIMES

Steps for no connection trip and LED blinking 3 times.

LED BLINKING AND TRIP PROTECTION LOGIC

OVER VOLTAGE TRIP AND LED BLINKING 4 TIMES

Steps for over voltage trip and LED blinking 4 times.

LED BLINKING AND TRIP PROTECTION LOGIC

LOCK PISTON TRIP AND LED BLINKING 5 TIMES

Steps for lock piston trip and LED blinking 5 times.

LED BLINKING AND TRIP PROTECTION LOGIC

CURRENT TRIP AND LED BLINKING 6 TIMES

Steps for current trip and LED blinking 6 times.

LED BLINKING AND TRIP PROTECTION LOGIC

IPM FAULT TRIP AND LED BLINKING 7 TIMES

Steps for IPM fault trip and LED blinking 7 times.

LED BLINKING AND TRIP PROTECTION LOGIC

COMMUNICATION ERROR AND LED BLINKING 8 TIMES

Steps for communication error and LED blinking 8 times.

CHECK PCB OUTPUT

CHECK COMPRESSOR AND HARNESS

CHECK COMPRESSOR AND HARNESS

SERVICE DIAGNOSIS CHART

REFRIGERATION CYCLE TROUBLESHOOTING

SEALED SYSTEM DIAGNOSIS

ICEMAKER OPERATION AND TROUBLESHOOTING

Basic Operating Method

Basic operating method of the icemaker.

ICEMAKER FUNCTIONS

Icemaking Mode

Description of the icemaking mode.

Harvest Mode

Description of the harvest mode.

Ice & Water System Troubleshooting

Troubleshooting issues with ice and water systems.

ICEMAKER DIAGNOSIS

Icemaker Unit Diagnosis

First step in diagnosing the icemaker unit.

ICEMAKER MALFUNCTIONS

Not Dispensing Ice

Troubleshooting for the ice dispenser not working.

MICOM FUNCTION AND CIRCUITRY

REFRIGERATOR FUNCTIONS

Overview of refrigerator functions.

Toggle Display (°F & °C)

How to switch display between Fahrenheit and Celsius.

Lock Function

How to use the lock function for dispenser and display.

FILTER AND DISPENSER FUNCTIONS

Filter Condition Display

Function of the filter condition display.

Ice Plus Selection

How to select Ice Plus feature.

Dispenser Use Selection

How to select water or ice from the dispenser.

SPECIAL FEATURE OPERATION

Hygiene Fresh Filter Operation

How to operate the Hygiene fresh filter.

AUTO Mode Operation

Description of the AUTO Mode operation.

POWER Mode Operation

Description of the POWER Mode operation.

COMPONENT CONTROL AND OPERATION

Freezer Fan Motor Control

Control of the freezer fan motor.

Cooling Fan Motor Operation

Operation of the cooling fan motor.

Ice Compartment Fan Operation

Operation of the ice compartment fan.

Ice PLUS Feature

Explanation of the Ice PLUS feature.

Display Mode Settings

How to set display mode and cancel it.

DEFROSTING AND DIAGNOSIS

Defrosting Process

Explanation of the defrosting process.

Defect Diagnosis Function

Function for diagnosing defects.

Auto Pantry Feature

Explanation of the Auto pantry feature.

EXPLODED VIEW AND PARTS LIST

CASE PARTS

List of case parts with exploded view.

FREEZER PARTS

REFRIGERATOR PARTS

DOOR PARTS

DISPENSER PARTS

VALVE & WATER TUBE PARTS

ICE MAKER & ICE BIN PARTS