a next 4 presentation

LG Electronics Training Center, LGEAI, U.S.A.

A Next 4 Series RefrigeratorLMXS307*6S w/ CustomChill Drawer

2LG Electronics Training Center, LGEAI, U.S.A.

Information

Web-Based Training Website http://www.lglearnservice.com

Global Service Front System (GSFS) Website - including Service Content System http://gsfs-america.lge.com

Product Information Website http://www.lg.com


Overview

These are the topics that will be covered today: Warranty Installation A next 4 Specifications Feature Changes on the A Next 4 Platform Disassembly Procedures and Hands on Teardown Electrical Circuits and Electrical Circuit Troubleshooting with

Hands on Breakdown of Error Codes Linear Compressor Troubleshooting The Signature Refresh Overview Review of Current Service Bulletins Final Question and Answers.


Warranty of the A Next 4


Warranty

From the Owners Manual


Warranty



Warranty


Warranty Limitations


Installation Procedures


Installation



Installation Freezer and Refrigerator Doors



Installation Removing the Left and Right Doors



Installation Leveling and Door Adjustment



Information Given to the Customer at Point of Sale


Air Flow Configuration at the Bottom of the Refrigerator

Note the Rubber Strip on the bottom of the Refrigerator is now positioned front to back instead of left to right on newer refrigerators.

Refrigerator Machine Compartment Cover in the back


A NEXT 4 Series Specifications


Glide out Shelf

Description `14 (A NEXT 4)

Image

Energy `14 E/StarCapacity 29.7 cu. ft.Cabinet 31 in. Depth

Dispenser Tall DispenserIce System Slim Indoor(Gen2)

Ref.

Lighting Top + Side LEDAir Filter YesCrisper 3-in-1W/Filter Compact in Door

Frz.Light LED

Handle Ez OpenLayout 3 Layer

FeatureGlide-out Shelf

DIDDoor Switch Reed Type

Door Reed Switch

Specification

Middle Door

Filter


Specification Dimension

Signature 1 - 4D (S1) A NEXT4(N4)

36.3

8.9

22.214.3

10.6

41.9

5.7


Filtered Water and Ice Dispenser Dispenses purified water and ice.

LED Display Displays the refrigerator and freezerTemperature, the water filter condition and the dispenser status.

Control Panel Sets the refrigerator and freezerTemperatures, the water filter conditionand the dispenser mode.

EZ Handle Easily opens the freezer door.

Handle Opens and closes the door.

Button

LED LightLED lights up when the Custom ChillDrawer is opened.

Custom Chill Drawer

Freezer Preserves frozen food.

Refrigerator Preserves food.

LED Light LED lights up when the freezer dooris opened.

Specification Exterior


LED interior lamps The interior lamps light upthe inside of the refrigerator.

Indoor Ice Bin Ice cubes areautomatically produced.

Crisper Helps vegetables andFruit to stay crisper.

Adjustable Refrigerator Shelf The shelves in your refrigerator areAdjustable to meet your individual storage needs.

Door In Door Case The convenience of a soft coolStorage area and easy access to Items stored in this area.

Cheese & Butter Bin Cheese & Butter and Condimentbins are specially designed for foodthat can be stored at a warmertemperature. This makes spreadingbutter and slicing cheese easier.

Easy Reach You can store small items, or defrost an item.

Specification Interior


Feature Changes on the A Next 4 Platform


Fresh Air Filter

Pure air

Air purifying system

1 Step Total care Filtration

1st Deodorization filter Odor

Module type(with fan)

Deodor


Feature Changes Glide N Access A NEXT 4


Feature Changes Door Switches A NEXT 4

Reed Switch

Magnet


Feature Changes Drawer Switches A NEXT 4

Reed Switch


Feature Changes Ice Bin A NEXT 4

New Parts


Feature Changes Water Filter A NEXT 4

Previous Location of filter on Signature models.

PreviousDesign


Feature Changes CUSTOMCHILL Drawer A NEXT 4


Feature Changes Freezer Drawers A NEXT 4


Feature Changes Easy Reach A NEXT 4

The Easy Reach areas are located at the bottom of the Fresh Food Compartment. They allow small items to be stored with easy access.

The temperature inside the Easy Reach is slightly lower than in the shelf or door bin area. This provides an accessible location to defrost or thaw items.


Disassembly Procedures and Hands on Teardown


Caution

To reduce the risk of electrical shock, the appliance should be unplugged when ever disassembling or reassembling components with electrical connections.


Custom Chill Drawer

Selectable temperatures (M-Room Display 12vdc circuit) 29 33 37 42

Separate Thermistor (M-Room Sensor) Damper (M-Room Stepping Motor) from Fresh Food Compartment to control

cold air flow Separate Heater (M-Htr) to allow for higher temperature setting than Fresh

Food Compartment Separate Door Switch (M/FU-Door Switch) and Light (M/FU LED Lamp)

Single Button Control


Custom Chill Drawer


Removal of the Custom Chill Drawer Display

Tools needed

1. Screw (Length 12mm~, pointed)

2. Screwdriver3. Slip Joint Pliers

1. Put a screw in the center of display. 2. Drive a screw by using driver. 3. Put the screw up by using a pliers.

4. Disassemble Housing. 5. Assemble housing to New display. 6. Put display down and Press Displayuntil assemble thoroughly.


Custom Chill Drawer RemovalTM

1. Pull the drawer open to full extension. 2. Separate housing. Disconnect electrical Cable.

3. Pull out door.


Custom Chill Drawer (Cover & Door S/W)TM

1. Remove screw. 2. Remove screw. 3. Unhook cover

4. Disassemble housing.

5. Disassemble housing from cover.

6. Remove screw.

7. Disassemble sensor from connector rail.


Water Valve

WaterTank

ConnectorIce Maker

BucketCity Water

CityWater

Valve Filter WaterTank

I/MDisp

Valve

A-NEXT4

WaterLine Filter

Connectors 9 EA(Filter/Tank/Valve Connecting Point Delete)

WaterFlow

Module Design

Connector

Water Filter & Water Line


Filter Module Replacement

1. Remove the bin 2. Remove screw 3. Disconnect the Valve housing

4. First Disconnect the Blue Tube, and then Disconnect the Orange tube.And finally the White Tube Reinstall tubing in this order : Orange Blue white

5. Replace the new Module Filter


Module filter Part Replacement

1. Remove these 3 screw 2. Holding the Connector, turn 90 to disconnect from the Filter headTurn the Water Tank 90 to disconnect the Filter head

4. Module Filter part are now separated3. Remove Snap Ring


Removing the Multi Duct Assembly

Multi Duct Assembly



Remove these Covers

Screws behind covers

Remove Screws (3)

No Screw Present



Disconnect


Refrigerator Evaporator



Removing the Custom Chill Door

Remove this bin


Removing the Custom Chill Door

Disconnect this Connection


Removing the Freezer Door

Open Freezer Door to full open position. Remove Freezer Bins. Remove the two screws on the Left and Right Rails.Lift off door.


Removing the Freezer Evaporator Cover

Freezer Evaporator Cover


Remove Screws




3 on the Bottom of the Cover



Remove these electrical connectors



Cover Removed



Back of Cover


Removing Freezer Switch

Electrical connect to Lower Freezer Magnetic Switch


Accessing Dispenser Board (Sub PCB)

Remove this Screw


Removing the Display Panel

Lock the display and remove the Drip Pan

Carefully pull forward as you disengage the clips holding the assembly

Display PCB Cap Duct Motor Cap Duct Door


Electrical Circuits and Electrical Circuit Troubleshooting with Hands on


Caution

When doing live electrical checks the risk of fatal electrical shock are always present. These checks should only be done by qualified personal. Extreme caution should always be observed.


Freezer Heater Circuit

COMMUNICATION CIRCUIT

LOAD CIRCUIT

MAIN PCB

Thermal Fuse

Freezer Defrost Sensor

Freezer Defrost Heater


13 F 46 F

Defrost Cycle


Refrigerator Heater Circuit

LOAD CIRCUIT COMMUNICATION CIRCUIT

Thermal Fuse

RefrigeratorDefrost Sensor


MAIN PCB

MAIN PCB

User Interface

Main PCB

Cooling Process


User Interface Main PCB

MAIN PCB

Refrigerator Sensor

FreezerSensor

Cooling Process

CON 7


Cooling Process

Main PCB


MAIN PCB

Cooling Process

3 Way Valve


Cooling Process

Condenser fan

Freezer fan

Fresh food fan


The Flex Tray Icemaker on the A Next 4 model unlike the Flex Tray on the previous Signature Models is now controlled by the CON 402 connector at the Main PCB.

Flex Tray Ice Maker


Test Button

Ice Maker on/off Switch

Ice Level Sensors

Flex Tray Ice Maker


Icemaker is now Controlled by the Main PCB


Testing the Icemaker

Step 1: Press the Test Button for 3 seconds. If the ice make runs the harvest and water cycle correctly the icemakers mechanism is preforming correctly. Proceed to Step 2.

Test Button


Testing the Icemaker


The Pilot Valve is located in the Machine Compartment.

The Ice Valve is located in a compartment in the left side Refrigerator door.

Water to the Icemaker


Ice Room Fan

The Flow Sensor is incorporated into the Pilot Valve.

Other Components used in Ice Production Process

Pilot Valve


Home Bar Heater

The Home Bar Heater


Speaker

Humidity Sensor

Smart Buzzer PCB

Room Temperature Sensor

Components located in the Right Door Hinge Cap

Smart Buzzer PCB and Humidity Sensor


Sub PCB (Dispenser PCB)

To Access PCB, remove screw. Sub PCB or Dispenser PCB

The Sub PCB or also referred to as the Dispenser PCB is located at the top of the Left Fresh Food Door


Relay 4 (Pilot Valve Water)

Relay 3 (Water Dispenser Valve)

Relay 2 (CRUSH)

Relay 1 (CUBE)

Sub PCB


Dispenser PCB (sub PCB)

The Dispenser PCB or Sub PCB receives commands from the Display PCB activates these components.

Auger Motor (crushed and cubed) Pillar Heater (center Fresh Food Mullion

Heater) Pilot Valve for Dispensed Water Secondary Valve for Dispensed Water Cap Duct Motor


5Vdc to Dispenser PCB

WIRE COLOR GREEN: Neutral CircuitBLUE: Run Winding CircuitRED: Start Winding Circuit

Crushed Ice



WIRE COLOR GREEN: Neutral CircuitBLUE: Run Winding CircuitRED: Start Winding Circuit

Cubed Ice


Dispensing Water from the Dispenser


Pilot Valve

Water Secondary Valve


Cap Duct Door Motor

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Smart Diagnosis Instructions


Getting in and out of the Demo Mode

With the refrigerator door in the open position, press and hold the Refrigerator Adjust & Ice Plus buttons until O/FF is displayed.


Breakdown of Error Codes


Error Codes

From the Service Manual


Sensor Errors

ERrS

ERFS

ERFS

FdS

rdS

ERHS

ERIS

ERSS

Refrigerator Sensor Error

Ice RoomSensor Error

Pantry Sensor Error

Freezer Sensor Error

Freezer Defrost Sensor Error

Refrigerator Defrost Sensor Error

Humidity Sensor Error

Sensor Errors are generated when the MAIN PCB sees the sensor as either open or shorted.

From the applicable connector at the Main PCB check for dc voltage to the sensor (0 or 5 Vdc would indicate a shorted or open Sensor) or disconnect power to the refrigerator and check resistance (0 or ohms indicate a shorted or an opened sensor). If sensor failed, check the exposed Sensor wire connections outside of liner to determine if the wiring in the cabinet is the issue.

With the exception of the Pantry, Room and Humidity Sensors, all sensor errors will be displayed after the 3 Hour hold window. To bring up the errors sooner then the 3 hour window or to display the error exceptions, Press and hold the Freezer and Ice Plus buttons together.

ERrT

Room Sensor Error

Test Points at Main PCB (ref. sensor)


Temperature Resistance Voltage

-40 -40 225.1 K 4.48 Vdc

-35 -31 169.8 K 4.33 Vdc

-30 -22 129.3 K 4.16 Vdc

-25 -13 99.30 K 3.95 Vdc

-20 -4 76.96 K 3.73 Vdc

-15 5 60.13 K 3.49 Vdc

-10 14 47.34 K 3.22 Vdc

-5 23 37.55 K 2.95 Vdc

0 32 30 K 2.67 Vdc

5 41 24.13 K 2.40 Vdc

10 50 19.53 K 2.14 Vdc

15 59 15.91 K 1.89 Vdc

20 68 13.03 K 1.64 Vdc

25 77 10.74 K 1.45 Vdc

30 86 8.89 K 1.27 Vdc

35 95 7.40 K 1.10 Vdc

40 104 6.20 K 0.96 Vdc

Refrigerator and Defrost SensorsTemperature Resistance Voltage

-40 -40 73.29 K 4.09 Vdc

-35 -31 53.63 K 3.84 Vdc

-30 -22 39.66 K 3.55 Vdc

-25 -13 29.62 K 3.23 Vdc

-20 -4 22.33 K 2.89 Vdc

-15 5 16.99 K 2.56 Vdc

-10 14 13.05 K 2.23 Vdc

-5 23 10.10 K 1.92 Vdc

0 32 7.88 K 1.63 Vdc

5 41 6.19 K 1.38 Vdc

10 50 4.91 K 1.16 Vdc

15 59 3.91 K 0.97 Vdc

20 68 3.14 K 0.81 Vdc

25 77 2.54 K 0.67 Vdc

30 86 2.07 K 0.56 Vdc

35 95 1.69 K 0.47 Vdc

40 104 1.39 K 0.39 Vdc

Freezer and Ice Room Sensors

Fresh Food and Freezer Sensor Charts


Fan Errors

ERIF

ERrF

ERCF

ERFF

Ice Room Fan Error

Freezer Fan Error

Refrigerator Fan Error

Condenser Fan Error

Fan Errors are generated when the Main PCB does not see a feed back signal from the fan.

Most Fans have 3 wires (voltage, ground and feedback). If the Main PCB does not see the correct feedback signal from the fan to verify it is running correctly (the signal voltage should correspond to the voltage supplied by the Main PCB) an error will be generated in approximately 60 seconds. Typical feedback voltage is 2 to 4 Vdc.

The feedback circuit can be measured at the G and F connector of the fan in question at the Main PCB.

If the fan is running and an error code is displayed, the fan motors feedback circuit is defective and the motor needs replacing. The Feedback signal at the main board will most likely be less then 2 or greater than 5.

Lower than 9 Vdc output indicates a bad Main PCB.

Remember the error will occur after 3 failed attempts (see Chart) and takes up to 3 hours before it is displayed.

Feedback voltage normally 2 to 4 Vdc

Normal voltage to fan motor 9 to 15 Vdc


FdH

rdh

Freezer Defrost Error

Refrigerator Defrost Error

Defrosting Errors

Defrosting errors occur because an hour has elapsed in the defrost Cycle and the defrost sensor has not reached the termination point of 46 F.

Check the Heater Thermal Fuse, Heater, Wiring, Sensor and Main PCB.

If the error is displayed and the power to the refrigerator is disconnected the error will be erased and will not return until after the next defrost cycle.

MAIN PCB

FreezerFresh Food


Icemaker Errors

ERIT

ERgf

Harvest Error

Flow Meter Error

The ER iT Error occurred because the icemaker Hall Sensor did not detect Icemaker tray movement.

Check the Icemaker Motor, Hall Sensor, Wiring. This error usually requires the Icemaker Kit to be replaced.

This Error can only be brought up manually. It will not automatically display this error.

The ER gF Error occurred because there was no input from the Flow Meter.

Check the Flow Meter, Inlet Valves, Wiring, and Main PCB.

This Error can only be brought up manually. It will not automatically display this error.

An ER iT Error most likely will be a failure of the Icemaker Kit

For a ER gF Error check the water valves and the flow meter on the pilot valve.


ERCO

Communication Errors

Communication Error

Communication Errors occur when the Main PCB can not communicate with the display PCB.

Check the wire harness at the top of the Left Door, check for 5Vdc at CON 5 pin 6, check for a communication signal at Display PCB CON 101 pins 1 & 2, and check the wiring in the Left Door.

Check the signal at either Main PCB, Display PCB or harness at top of Left door a good signal will be a pulsing 5Vdc.

CON5 on the Main PCB

CON 101 on Display PCB Connector at the Left Door Hinge.


Checking for Error Codes

Press and hold theFreezer Adjust & Ice Plus buttons.


Linear Compressor Troubleshooting


AB

C

Reference

Reference to Point A=2.2 to 2.8VdcReference to Point B=2.2 to 2.8VdcReference to Point C=2.2 to 2.8VdcWith compressor off

Reason for the Fault: Detecting Motor Current and Voltage Errors.

Points to Check: Reference to A = 2.2 to 2.8VdcReference to B= 2.2 to 2.8VdcReference to C =2.2 to 2.8VdcWhile compressor is off.

Device should not be dead shorted. when you check C.

1. Reset Power2. Replace PCB if out of

specification.

Inverter LED Blinking Codes



Reason for the Fault: Preventing abnormallyLong Piston Strokes.

Causes:1. If compressor works intermittently and the

Led Blinks. Check the harness to the compressor2. If compressor works intermittently and blinks.

a. Make sure condenser fan and Freezer is running.b. Check for Sealed System issues, such as leak or

restriction .

Logic: Compressor is forced off and tries to start after 1 minute.


Reason for the Fault: Prevent Over voltage and Current Detecting when starting.

Cause: Starting Error of the PCB and Compressor, Capacitor Harness or Capacitor, Open Compressor Winding.

Logic: Compressor is forced off and tries to restart within 40 seconds.




Reason for the Fault: Detects Locked Piston.

Cause: Cylinder, Cylinder Piston damaged. or restricted discharge. This can be caused by foreign material inside the compressor

Logic: Compressor is forced off and tries to restart within 2.5 seconds.


Reason for the Fault: Prevents Over-Current (overload protection).

Cause: Ambient temperature is high (over 43 C ) and or the refrigerators air movement is restricted, Condenser Fan Stopped, Restricted Discharge line, Compressor Damage, or IPM is defective.

Logic: Compressor is forced off and tries to restart after 6 minutes.




Reason for the Fault: To prevent high current due to IPM Short.

Cause: Dead Short at the IPM. Test for a dead at Point A with a VOM.

Logic: Compressor is Forced off and tries to restart in 20 seconds.

With refrigerator unplugged check for a dead short at CON201 pins 1 & 3.



Reason for the Fault: Detects Set Control MICON and Communication Errors.

Cause: Communication Error.

Logic: LED Blink (Compressor runs reference value before occurring Communication Error.

Check the temperature and pressure of the compressor

Make sure the condenser fan is running.


Measuring the Resistance on the Linear Compressor


Quick Inverter Check


Main PCB Schematic


Schematic of Display and Sub PCB (Dispenser PCB


The Signature Refresh Overview


Signature RefreshIn the later portion of 2014, LG updated their French-Door Refrigerator product line.

Another designs that has evolved from the previous Signature Series (31 cu. Ft. series), the Signature Refresh .

The Signature Refresh Series, models LFXS29**** and larger, are the new updated version of the previous LFX29**** and larger models.

Quick look at the Signature Refresh


Feature Changes Glide N Access Signature Refresh

Signature(S)


Feature Changes Ice Bin Signature Refresh

Signature(S)

New Parts


Feature Changes Smart Grid Signature Refresh

Signature (S) Signature Refresh

Smart Grid

Ice On/Off


Smart Grid Signature Refresh

Utility

LG ThinQServer

Gateway

UtilityCloud Service

Click REF Manager Click Smart Saving Turn Demand Response functionality on

If refrigerator is receiving signals from utility,Refrigerator will lower energy usage during Event Time.


Smart Amp Signature Refresh

Click REF Manager Sync .Adjust Temperature or Turn Ice Plus On

Send Adjustment to Refrigerator


Smart Amp Signature Refresh


Glide out Shelf

Ice Maker (Gen3)

Door Reed Switch

SR Specification

Description `13 (Signature 2 DID) `14 (Signature Refresh DID)

Image

Energy `13 E/Star `14 E/StarCapacity 31 cu.ft 30 cu.ft

Dispenser Tall Dispenser Tall DispenserIce System Slim Indoor(Gen2) Slim Indoor(Gen3)

Ref.

Lighting Top + Side LED Top + Side LEDAir Filter Yes YesCrisper 3-in-1 3-in-1W/Filter Compact Compact

Frz.Light LED LED

Handle Ez Open Ez OpenLayout 3 Layer 3 Layer

Feature- Glide-out Shelf

DID DIDDoor Switch Push Button Type Reed Type


With the new models of LG Refrigerators, there is a new design Door Switch being used. This new Door Switch employs an internal reed switch and magnets in the door to operate. Therefore, there is nothing protruding, as seen in the previous design. We have seen multiple cases where the Door Switches are not reconnected after the Door was removed for installation. We feel that since there is no aspect of the Door Switch seen externally, it may be easy to neglect. Please make sure that the Door Switches are reconnected at the time of installation.of a range of Freezer or Fresh Food temperatures.

Feature Changes Door Switches Signature Refresh

Previous Models

New Models

Push Switch

Reed Switch

Magnet


Door Hinge Covers

Previous Models New Models

LFXS327**LFXS307**LFXS296**LFXC247**LMXS307**

LFX329**LFX319**LFX299**LFX259**


Feature Changes Drawer Switches Signature Refresh

Push Switch Reed Switch

Previous Models

New Models

Note that on the Freezer Drawer Switches, LG is now using the same type od Switches that are now used on the doors.

Once again, there are no physical protrusions.

Please use caution when handling the corresponding Drawers and make sure to not damage the magnet housing.


Feature Changes Ice Maker Signature Refresh

Signature Refresh only

Twist-N-sever icemaker

On / Off Switch

On / Off Switch(at Display)

Previous Models

The Signature Refresh models (LFXS) feature a new design Ice Maker. On these models, the Ice Maker is turned On or Off by holding the Ice Plus | Ice In/Off button on the Display Panel for 3 seconds.


Freezer Interior Lights Signature Refresh

Left Door

Right Door

Left Door

Right Door

3 LEDs 4 LEDs

The Signature models used LEDs (3 in each side) in the bottom of each Fresh Food Door to light the interior of the Freezer Compartment.The Signature Refresh models use 4 LEDs under the Right Door only, to light the Freezer Compartment.The Signature Refresh Left Door still has a provision in the molding for LEDs, however, it is not used.

Previous Models New Models


Sub-PCB Change Signature Refresh

Signature(S) Signature Refresh (SR)

In the Signature models, the Sub-PCB (Dispenser/Relay Board) was located behind the Dispenser. In the Signature Refresh model, the Sub-PCB is located in the top of the Left Door.


Sub-PCB Change Signature Refresh

Sub,PCB Removal1.Remove 1 Screw.

2. Carefully lift the cover

3.Reverse the cover.

4.Disconnect capacitor housing.

5.Disconnect wire harness.

Sub,PCB Replacement1.Reverse the Sub,PCB cover.

2.Connect wire harness.

3.Connect the capacitor housing.

4.Insert the cover, left edge first..

5.Assemble 1 screw.


Heaters Signature Refresh

Pillar Heater

Water Pipe Heater

Ice Maker Heater

Beta-Duct Heater

Ice-Room Fan Heater

DID Heater

R-Evap. Heater

Drain Heater

F-Evap. Heater 1

F-Evap. Heater 2


Additional Heaters Signature Refresh

R Eva

F Eva

R - Eva

F - Eva


Additional Heaters Signature Refresh

Ice Room Fan

Heater

Drain Heater


Review of Current Service Bulletins


Current Service Bulletins SB-1406-002


Current Service Bulletins SB-1406-002 (continued)


Current Service Bulletins SB1409001


Current Service Bulletins SB1409001 (continued)


Current Service Bulletins SB1409001


Current Service Bulletins CREF20141610 (continued)


Current Service Bulletins


Current Service Bulletins (continued)


Final Question and Answers


QUIZ ELECTICAL TS

1.What temperature does the defrost sensor reach for termination of the defrost cycle?

a. 32 degrees Fb.36 degrees Fc.42 degrees Fd. 46 degrees F

2. TRUE or FALSE: The Inverter PCB can vary the voltage and frequency to the Linear Compressor.

3. What is the status of the refrigerator and freezer fans when the doors are in the opened position?

a. Onb. Offc. Standbyd. Intermittent

4. TRUE or FALSE: The Ice Room Fan turns on during defrost and when the doors are open.


5. What is the Icemaker motor voltage for the A next 4 refrigerator?a.9Vdcb. 3.5Vdcc.12Vdcd. 5Vdc

6. On the A next 4 refrigerator, where has the Sub PCB or Dispenser PCB been moved to?

a. Top of the Left Doorb. Bottom of the Left Doorc. A different position on the Control Paneld. It has not been moved

7.Once the ice has been dispensed, how long will the cap duct door remain open?

a. It immediately closesb. 1 secondc. 3 secondsd.5 seconds


8. TRUE or FALSE: Refrigerators manufactured after 2010 will immediately display Error Codes.

9. What causes the ER gF Error?a. No input from the Flow Meterb. Hall Sensor did not detect Icemaker Tray movementc. Main PCB not communicating with the display PCBd. The Thermal Fuse is bad

10.What is generated when the Main PCB registers 0 or 5Vdc at the sensor connection?

a. Fan errorsb. Sensor Errorsc. Defrost Errorsd. Communication Errors


QUIZ ELECTICAL TS

1.What temperature does the defrost sensor reach for termination of the defrost cycle?

a. 32 degrees Fb.36 degrees Fc. 42 degrees Fd. 46 degrees F

2. TRUE or FALSE: The Inverter PCB can vary the voltage and frequency to the Linear Compressor.

3. What is the status of the refrigerator and freezer fans when the doors are in the opened position?

a. Onb. Offc. Standbyd. Intermittent

4. TRUE or FALSE: The Ice Room Fan turns on during defrost and when the doors are open.


5. What is the Icemaker motor voltage for the A next 4 refrigerator?a.9Vdcb. 3.5Vdcc.12Vdcd. 5Vdc

6. On the A next 4 refrigerator, where has the Sub PCB or Dispenser PCB been moved to?

a. Top of the Left Doorb. Bottom of the Left Doorc. A different position on the Control Paneld. It has not been moved

7.Once the ice has been dispensed, how long will the cap duct door remain open?

a. It immediately closesb. 1 secondc. 3 secondsd. 5 seconds


8. TRUE or FALSE: Refrigerators manufactured after 2010 will immediately display Error Codes.

9. What causes the ER gF Error?a. No input from the Flow Meterb. Hall Sensor did not detect Icemaker Tray movementc. Main PCB not communicating with the display PCBd. The Thermal Fuse is bad

10.What is generated when the Main PCB registers 0 or 5Vdc at the sensor connection?

a. Fan errorsb. Sensor Errorsc. Defrost Errorsd. Communication Errors


Today we covered these topics: Warranty Installation A next 4 Specifications Feature Changes on the A Next 4 Platform Disassembly Procedures and Hands on Teardown Electrical Circuits and Electrical Circuit Troubleshooting

with Hands on Breakdown of Error Codes Linear Compressor Troubleshooting The Signature Refresh Overview Review of Current Service Bulletins Final Question and Answers.

Review


Extras


Hard to Find Part Numbers - REF

UV Dye Driers

Inlet Dia. P/no Type Detail

ID 2.2mmADH73150202

1 EvaStandard

ADH73150207 w/ Charge Port

ID 4.2mmADH73150201

2 EvaStandard

ADH73150206 w/ Charge Port

Varied ADH73150208 Either w/ Extension


6500JB2001B White Leads Refrigerator, Room Temperature & Defrost Sensors

6500JB2002B Navy Blue Leads (sub to 6500JB2002T)Freezer, Icing Room & IM Tray Sensors

6500JB2001B 6500JB2002B

Universal Replacement Refrigerator Sensors / Splice using solder & heat shrink tubing!


Suggested Tools All Appliances

Fluke 8845A-EFPT Test Lead Adapters

Fluke TP920 Test Lead Service Kit

VOM Test Lead Adapters Fluke 8845A-EFPT Test Lead Adapter

/ 3 amp 300VDC Fluke TP920 Service Kit These items are available through your

local supplier or an internet supplier. These are not available through LG. Other mfgs. offer similar test lead

adapters. See your local supplier or visit the internet.


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