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LG LFX28968D User Manual

LG LFX28968D
104 pages
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CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LFX28968**
COLOR : STAINLESS(ST)
SMOOTH BLACK(SB)
SUPER WHITE(SW)
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

Questions and Answers:

LG LFX28968D Specifications

General IconGeneral
Typefreestanding
Stylefrench door
Colorblack stainless steel
Refrigerator Capacity26.8 cubic feet
Freezer Capacity8.9 cubic feet
Humidity Controlled Crispersyes
Defrost Systemmanual
Quick Freezeyes
Temperature Controlelectronic
Interior Lightled
Ice Makeryes
Water Filteryes
Door Alarmyes
Smart Homeno
Annual Energy Consumption715 kilowatt hours
Weight and Dimensions IconWeight and Dimensions
Depth35.4 inches
Height69.7 inches
Width35.75 inches
Net Weight341.7 pounds

Summary

Safety Precautions

Specifications

Model Specifications

Detailed technical specifications for the LFX28968 model, including dimensions and weight.

Dimensional Data

Provides physical dimensions of the refrigerator unit with labels A through I.

Parts Identification

Refrigerator Compartment Parts

Identifies major parts within the refrigerator compartment, such as shelving and bins.

Disassembly Procedures

Removing Refrigerator Door

Step-by-step instructions for safely removing the refrigerator's left and right doors.

Refrigerator Door Hinge Removal

Details on how to handle hinge levers and pins during door removal.

Door Components Service

Mullion Removal and Replacement

Procedures for removing and replacing the mullion part of the refrigerator.

Door Gasket Removal and Replacement

Steps for detaching and reattaching the door gasket for maintenance or replacement.

Fan and Defrost Control Service

Evaporator Fan Motor Replacement

Instructions for replacing the evaporator fan motor assembly.

Defrost Control Assembly Replacement

Steps for replacing the defrost control assembly, including sensor and fuse.

Lamp and Duct Service

Refrigerator Compartment Lamp Service

Instructions for removing and replacing the LED lamp in the refrigerator compartment.

Multi Duct Removal

Procedure for removing the multi duct assembly.

Main PWB and Dispenser Service

Main PWB Replacement

Steps for removing and replacing the main Printed Wiring Board (PWB).

Dispenser Assembly Removal

Instructions for disassembling and removing the dispenser unit.

Icemaker and Water Components

Icemaker Assembly Replacement

Step-by-step instructions for replacing the icemaker unit.

Dispenser and Duct Motor Service

Sub PWB Replacement

Steps for replacing the sub PWB for the dispenser.

Cap Duct Motor Replacement

Procedure for replacing the cap duct motor.

Ice Bin Handling

Ice Bin Removal Procedure

Instructions on how to grip, tilt, and remove the ice bin.

Ice Bin Insertion Procedure

Steps for correctly inserting the ice bin into the compartment.

Pullout Drawer Service

Pullout Drawer Removal Steps

Detailed steps for removing the pullout drawer from the freezer.

Pullout Drawer Reinstallation

Pullout Drawer Reinstallation Steps

Detailed steps for reinstalling the pullout drawer into the freezer.

Freezer Handle Service

Freezer Handle Removal Procedure

Step-by-step guide to remove the freezer door handle.

Freezer Handle Reinstallation

Freezer Handle Reinstallation Procedure

Step-by-step guide to reinstall the freezer door handle.

Valve and Fan Motor Service

Water Valve Removal

Procedure for disassembling and removing the water valve.

Fan and Fan Motor Disassembly

Steps for disassembling and removing the fan and fan motor.

Drawer Removal and Installation

Drawer Removal and Installation

Instructions for removing and installing drawers.

Adjustment and Compressor Logic

Compressor Role and Notes

Explains the compressor's function and important usage precautions.

Compressor Protection Logic

Details the protection mechanisms for the compressor, motor, and PCB.

PTC Cover Removal

Steps for removing the PTC cover from the compressor.

Circuit Diagram

Troubleshooting Overview

Error Code Summary

Lists error codes, detection categories, generation factors, and remarks for troubleshooting.

PCB Identification

Main PCB Identification

Shows the main Printed Wiring Board (PWB) with connector labels.

Display PCB Identification

Identifies the display Printed Circuit Board (PCB) and its connectors.

Sub PCB Identification

Sub PCB Identification

Identifies the sub Printed Circuit Board (PCB).

Sensor Error Troubleshooting

Freezer Sensor Error (E FS) Troubleshooting

Diagnoses and provides solutions for the freezer sensor error.

Refrigerator Sensor Error Troubleshooting

Refrigerator Sensor Error Diagnosis

Guide for diagnosing and resolving the refrigerator sensor error.

Icing Sensor Error Troubleshooting

Icing Sensor Error Diagnosis

Procedure for diagnosing and resolving icing sensor errors.

Defrost Sensor Error Troubleshooting

Defrost Sensor Error Diagnosis

Steps to diagnose and fix defrost sensor errors.

Ice Maker Motor Error Troubleshooting

Ice Maker Motor Error Diagnosis

Troubleshooting steps for ice maker motor errors.

Defrost Heater Error Troubleshooting

Defrost Heater Error Diagnosis

Steps for diagnosing and resolving defrost heater errors.

Fan Error Troubleshooting

Freezer Fan Error Diagnosis

Troubleshooting procedure for freezer fan errors.

Icing Fan Error Troubleshooting

Icing Fan Error Diagnosis

Steps for diagnosing and resolving icing fan errors.

Condenser Fan Error Troubleshooting

Condenser Fan Error Diagnosis

Troubleshooting procedure for condenser fan errors.

Communication Error Troubleshooting

Communication Error Diagnosis

Steps to diagnose and resolve communication errors.

Ice Dispensing Mode Troubleshooting

Cube Mode Malfunction Diagnosis

Troubleshooting steps when the cube mode is not working.

Crush Mode Troubleshooting

Crush Mode Malfunction Diagnosis

Troubleshooting steps for when the crush mode is not functioning.

Water Mode Troubleshooting

Water Mode Malfunction Diagnosis

Troubleshooting steps for when the water mode is not functioning.

Lamp Malfunction Troubleshooting

Refrigerator Lamp Malfunction Diagnosis

Steps to diagnose why the refrigerator room lamp is not working.

Freezer Lamp Malfunction Troubleshooting

Freezer Lamp Malfunction Diagnosis

Troubleshooting steps for a non-working freezer room lamp.

Cooling Performance Troubleshooting

Fresh Food Section Cooling Diagnosis

Troubleshooting poor cooling in the fresh food section.

Freezer Cooling Performance

Freezer Compartment Cooling Diagnosis

Troubleshooting poor cooling in the freezer compartment.

Freezer Over Cooling Troubleshooting

Freezer Compartment Over Cooling Diagnosis

Troubleshooting steps for overcooling in the freezer compartment.

Hygiene Fan Troubleshooting

Hygiene Fan Malfunction Diagnosis

Troubleshooting for the hygiene fan not working.

Hygiene LED Troubleshooting

Hygiene LED Malfunction Diagnosis

Troubleshooting steps for a non-working hygiene LED.

Reference Information

Test Mode and TPA Procedure

Guide to entering test mode and removing Terminal Position Assurance (TPA).

Temperature Sensor Charts

Temperature Chart for Freezer/Icing Sensor

Table showing resistance and voltage values for freezer and icing sensors at various temperatures.

Temperature Chart for Refrigerator/Defrost Sensor

Table showing resistance and voltage values for refrigerator and defrost sensors at various temperatures.

Fan Error Checking Method

Fan-Error Detection Logic

Explanation of the MICOM's process for detecting fan motor errors.

Component Function and Measurement

Door Switch Function and Measurement

Describes the door switch's function and how to measure its resistance.

Dispenser DC Motor Function and Measurement

Explains the dispenser DC motor's function and resistance measurement.

AC Motor Assembly Function and Measurement

Describes the AC motor's function and how to measure its resistance.

Damper Function and Measurement

Explains the damper's function and how to check its electrical current.

Flow Sensor Function and Measurement

Describes the flow sensor's function and how to measure its resistance.

Compressor Troubleshooting Steps

PCB Check Simplified Flow

Simplified troubleshooting flowchart for PCB checks related to compressor issues.

Compressor Troubleshooting Test Mode

Details the test modes for compressor troubleshooting.

Compressor Fault Checks

IPM Output Voltage Check

Procedure for checking the IPM output voltage for compressor operation.

LED Error Code Analysis

LED Blinking Pattern Analysis (FCT0 Fault)

Analyzes LED blinking patterns for FCT0 faults and related checks.

LED Blinking Pattern Analysis (Stroke Trip)

Analyzes LED blinking patterns for Stroke Trip faults and related checks.

Specific Compressor Fault Diagnosis

Locked Piston Fault Diagnosis

Troubleshooting steps for locked piston faults indicated by LED blinks.

Current Trip Fault Diagnosis

Troubleshooting steps for current trip faults indicated by LED blinks.

IPM Fault Diagnosis

IPM Fault Diagnosis

Troubleshooting steps for IPM faults indicated by LED blinks.

Harness and Capacitor Checks

Harness Connection and Capacitor Checks

Steps to check harness connections and capacitor specifications.

Protection Logic and Sealed System

Activate Protection Logic Checks

Procedures to activate and check protection logic for fans and compressor.

Sealed System Diagnosis

Diagnostic steps for the refrigerator's sealed system.

Compressor PWB and LED Check

PWB Cover Removal and LED Check

Steps for accessing the PWB and checking LED blinking patterns.

Service Diagnosis Chart

Troubleshooting Common Cooling Issues

Common complaints and their troubleshooting steps and remedies.

Refrigeration Cycle Analysis

Refrigeration Cycle Troubleshooting Chart

Chart detailing causes, states, and remedies for refrigeration cycle issues.

Sealed System Diagnosis for Cooling

Sealed System Diagnosis for "Not Cooling"

Diagnostic flowchart for "Not Cooling" complaints related to the sealed system.

Icemaker Operation and Troubleshooting

Icemaker Basic Operating Method

Explains the step-by-step operation of the icemaker unit.

Icemaker Functions and Issues

Icemaker Not Making Ice Diagnosis

Troubleshooting guide for icemaker not making ice or not enough ice.

Refrigerator Functions and Features

Refrigerator Control Functions

Explains basic functions like temperature adjustment and power save mode.

Control Panel Lock Function

Details on how to lock and unlock the control panel buttons.

Filter and Ice Plus Features

Ice Plus Function Operation

Describes the purpose and operation of the Ice Plus quick freeze function.

Ice Plus Function Details

Ice Plus Function Details and Timing

Provides detailed information on the Ice Plus function's operation and timing.

Defect Diagnosis and Defrosting

Defect Diagnosis Function

Describes the automatic diagnosis system for defects and error codes.

Defrost Cycle Operation

Explains when and how the defrosting cycle operates.

Exploded View and Parts Lists

Case Parts Identification

Exploded view and part numbers for the refrigerator's case components.

Freezer Parts Diagram

Freezer Compartment Parts Diagram

Exploded view and part numbers for freezer compartment components.

Refrigerator Parts Diagram

Refrigerator Compartment Parts Diagram

Exploded view and part numbers for refrigerator compartment components.

Door Parts Diagram

Refrigerator Door Parts Diagram

Exploded view and part numbers for refrigerator door components.

Dispenser Parts Diagram

Dispenser Assembly Parts Diagram

Exploded view and part numbers for the dispenser assembly.

Water System Parts Diagram

Water Valve and Tube Parts Diagram

Exploded view and part numbers for water valve and tube components.

Icemaker and Ice Bin Parts Diagram

Icemaker and Ice Bin Parts Diagram

Exploded view and part numbers for icemaker and ice bin components.

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