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LG LMXS28626 Series User Manual

LG LMXS28626 Series
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CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LMXS28626*
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 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 © 2016-2017 LG Electronics Inc. All rights reserved. Only training and service purposes

Table of Contents

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LG LMXS28626 Series Specifications

General IconGeneral
TypeFrench Door
Ice MakerYes
Water DispenserYes
Energy Star CertifiedYes
SmartDiagnosisYes
Display TypeLED
Ice DispenserYes
Door in DoorYes
Linear CoolingYes
Smart CoolingYes
Dimensions (W x H x D)35 3/4" x 70 1/4" x 36 1/4"
ColorStainless Steel
Height70 1/4"

Summary

Safety Precautions

Specifications

LMXS28626* Specifications

Detailed specifications for the LMXS28626* model, including dimensions and features.

Refrigerator Dimensions

Visual representation and measurements of the refrigerator's external dimensions.

Disassembly Procedures

Removing Refrigerator Doors

Instructions for safely removing and reinstalling the refrigerator doors.

Door Components and Replacement

Procedures for removing and replacing door components like the mullion and gasket.

Sub PCB for Dispenser

Steps for removing and replacing the sub PCB related to the dispenser function.

Door Alignment Adjustment

Guide on how to adjust the refrigerator doors for proper alignment.

Evaporator Fan Motor Replacement

Procedure for disassembling and replacing the evaporator fan and its motor.

Defrost Control Assembly

Information about the defrost control assembly and its components.

Lamp Replacement

Instructions for replacing interior lamps in the refrigerator.

Cap Decor LED Lamp Replacement

Procedure for replacing the LED lamp in the bottom cap decor.

Multi Duct Disassembly

Steps to remove and service the multi-duct component.

Main PCB Replacement

Steps for removing and replacing the main Printed Circuit Board (PCB).

Display PCB Replacement

Procedure for disassembling and replacing the display PCB.

Ice Corner Door Replacement

Steps to replace the ice corner door component.

Icemaker Replacement

Detailed procedure for replacing the icemaker unit.

Cap Duct Motor Replacement

Steps for replacing the motor associated with the cap duct.

Removing the Ice Bin

Instructions for removing the ice bin from the refrigerator.

Inserting the Ice Bin

Instructions for properly inserting the ice bin back into the refrigerator.

Pullout Drawer Removal and Reinstallation

Step-by-step guide for removing and reinstalling the refrigerator's pullout drawer.

Water Valve Disassembly

Procedure for disassembling the water valve assembly.

Fan Motor Assembly Disassembly

Steps for disassembling the fan motor assembly.

Drawer Removal

Instructions for removing the refrigerator drawers.

Vegetable Box Disassembly and Assembly

Adjustments

Compressor Information

Details about the compressor's role, usage notes, and removal of its cover.

Compressor Protection Logic

Explanation of the protection mechanisms and logic for the compressor.

Circuit Diagram

Troubleshooting Guide

Error Code Summary

List of error codes, their detection categories, display, generation factors, and remarks.

PCB Component Identification

Sub PCB Identification

Visual identification of the sub printed circuit board (PCB) and its connectors.

Freezer Sensor Error (FS E) Troubleshooting

Refrigerator Sensor Error (rS E) Troubleshooting

Icing Sensor Error (IS E) Troubleshooting

Defrost Sensor Error (dS F) Troubleshooting

Ice Maker Motor Error (It E) Troubleshooting

Defrost Heater Error (dH F) Troubleshooting

Freezer Fan Error (FF E) Troubleshooting

Icing Fan Error (IF E) Troubleshooting

Condenser Fan Error (CF E) Troubleshooting

Communication Error (CO E) Troubleshooting

Cube Mode Not Working Troubleshooting

Crush Mode Not Working Troubleshooting

Water Mode Not Working Troubleshooting

Refrigerator Lamp Not Working Troubleshooting

Freezer Lamp Not Working Troubleshooting

Poor Cooling in Fresh Food Section Troubleshooting

Poor Cooling in Freezer Compartment Troubleshooting

Over Cooling in Freezer Compartment Troubleshooting

Home Bar Heater Not Working Troubleshooting

Hygiene Fan Not Working Troubleshooting

Wi-Fi Modem Not Working Troubleshooting

Reference Materials

Test Mode and TPA Procedures

Instructions for entering test modes and removing Terminal Position Assurance (TPA).

Temperature Chart: Freezer and Icing Sensor

Table correlating temperatures with resistance and voltage for freezer and icing sensors.

Temperature Chart: Refrigerator and Defrost Sensor

Table correlating temperatures with resistance and voltage for refrigerator and defrost sensors.

Fan Error Checking Procedure

Method for checking and diagnosing fan errors based on signal feedback.

Component Testing Information

Defrost Controller Assembly Testing

Information on testing the defrost controller assembly, including fuse and sensor.

Sheath Heater Testing

Procedure for checking the resistance of the sheath heater for proper function.

Door Heater Assembly Testing

Information on testing the door heater assembly, designed to prevent door condensation.

Dispenser DC Motor Testing

Procedure for testing the dispenser DC motor and its resistance.

AC Motor Assembly Testing

Steps for testing the AC motor assembly, likely related to ice dispensing.

Damper Testing

Procedure for testing the damper's resistance and electrical current.

Flow Sensor Testing

Procedure for testing the flow sensor's resistance.

Compressor Troubleshooting

Simplified PCB Check

A simplified overview of checking the PCB related to compressor operation.

Compressor Check A: Voltage and IPM Output

Steps for checking voltage and IPM output for compressor operation.

Compressor Troubleshooting: LED Blink Analysis (Check B)

Diagnosing compressor issues based on LED blink patterns and protection logic.

Locked Piston Error Troubleshooting

Steps to troubleshoot compressor issues indicated by five LED blinks (Locked Piston).

Current Trip Error Troubleshooting

Steps to troubleshoot compressor issues indicated by six LED blinks (Current Trip).

IPM Fault Error Troubleshooting

Steps to troubleshoot compressor issues indicated by seven LED blinks (IPM Fault).

Compressor Check C: Harness and Capacitor

Procedures for checking harness connections, capacitor specifications, and compressor terminals.

Compressor Check D: Protection Logic and Sealed System

Analysis of protection logic and diagnosis of sealed system issues affecting the compressor.

Service Diagnosis Chart

Refrigeration Cycle Troubleshooting

Sealed System Diagnosis

A flowchart for diagnosing problems within the sealed system of the refrigerator.

Icemaker Operation and Troubleshooting

Icemaker Basic Operation

Step-by-step explanation of the icemaker's basic operating functions.

Icemaker Functions

Detailed explanation of icemaker modes: Icemaking, Harvest, and Fill/Park.

Ice & Water System Troubleshooting

Troubleshooting guide for issues related to the ice and water system.

Icemaker Not Making Ice Troubleshooting

Diagnosing reasons why the icemaker is not producing ice or producing insufficient ice.

Icemaker Unit & Sensor Diagnosis

Procedure to diagnose the icemaker unit and its ice-detecting sensor.

Icemaker Other Suspected Issues

Addresses other potential causes for icemaker malfunction, such as cap duct sealing.

Ice Dispensing Issues Troubleshooting

Diagnosing and resolving problems related to dispensing ice.

Function and MICOM Circuit Description

Refrigerator Functions Overview

General overview of the refrigerator's operational functions and modes.

Filter Status Display Function

Explanation of how the filter replacement indicator functions.

Ice Plus Selection Function

Description of the Ice Plus function for quick freezing and its operation.

Dispenser Use Selection

How to select water or ice type from the dispenser.

Hygiene Fresh Filter Operation

Instructions on how to operate the Hygiene fresh filter system.

Auto Mode Operation

Description of the automatic fan operation mode for air circulation.

Power Mode Operation

Description of the power fan operation mode for air circulation.

Ice Plus Function Details

Detailed explanation of the Ice Plus function's purpose, activation, and operation.

Display Mode Setting and Cancellation

Instructions on how to change and cancel the refrigerator's display mode.

Freezer Fan Motor Control

Explanation of the freezer fan motor's speed control and operation.

Defrosting Process Description

Explanation of how and when the defrosting process starts and stops.

Defect Diagnosis Function

Information on the refrigerator's automatic diagnosis system for detecting defects.

Auto Pantry Temperature Control

Description of the Auto Pantry temperature control settings.

Exploded View and Parts List

Case Parts Identification

Identification of major external case parts with their corresponding numbers.

Freezer Compartment Parts

Identification of parts specific to the freezer compartment.

Refrigerator Compartment Parts

Identification of parts specific to the refrigerator compartment.

Door Components Identification

Identification of various parts that make up the refrigerator doors.

Dispenser Component Identification

Identification of parts related to the refrigerator's ice and water dispenser.

Valve and Water Tube Parts Identification

Identification of parts related to the water inlet valve and tubing system.

Icemaker and Ice Bin Parts Identification

Identification of parts related to the icemaker unit and ice bin.

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