LG LRSES2706V /01 Service Manual Download Page 21

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Micom Circuit description

Temperature compensation from cut

JCF3

JCF4

-1

-2

Undercool compensation

CUT

Freezer temperature

compensation

(Factory default)

-1

-2

Remarks

2. Freezer undercool compensation circuit

2-1. Communication circuit and connecting L/wire between main PCB and display PCB

L/Wire FD/H( 4 wires)

Display PCB

Main PCB

DC 12V

GND

Receive (NO TCH condition)

Send (Error condition)

Main MICOM

MICOM exclusively

for LCD

reserved. Only training and service purposes.

Summary of Contents for LRSES2706V /01

Page 1: ... 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 2020 LG Electronics Inc All rights reserved O...

Page 2: ...S 6 COMPRESSOR 7 TROUBLESHOOTING 1 FREEZER SENSOR ERRROR 2 REFRIGERATOR SENSOR ERROR 3 TEMPERATURE SENSOR ERROR 4 ICING SENSOR ERROR 5 DEFROST SENSOR ERROR 6 DEFROST HEATER ERROR 7 FREEZER FAN ERROR 8 CONDENSER FAN ERROR 9 COMMUNICATION ERROR 10 ICEMAKER MOTOR ERROR 9 HOW TO DISASSEMBLE AND ASSEMBLE 1 HANDLE REMOVAL 2 DISPENSER 3 FAN AND MOTOR DISASSEMBLY METHOD 4 ICE MAKER 5 HOW TO ADJUST THE REF...

Page 3: ...n temperature 494 C 1 4 Characteristics of R600a refrigerant It has about 60 of the amount of refrigerant in refrigerators that use R134a In the suction pressure low compression it has a high degree of vacuum 1 bar or less The volume of the refrigerator compressor using R600a is 1 7 times larger than the compressor volume of the refrigerator that uses R134a The label as in 1 5 Place of repair and ...

Page 4: ... electric shock Control board PWB Main and Sub uses power supply of about 120 VAC Do not allow consumers to directly repair disassemble or modify the refrigerator Harm electric shock r Be sure the plug and cord are not pressed by the rear side of the refrigerator Damage to power plugs electric shock Plug the refrigerator into a dedicated circuit Plugging in too many appliances the operation of you...

Page 5: ...ing of the refrigerator remove the doors to eliminate the possibility of children playing in it Children may become entrapped in the refrigerator Unplug the refrigerator for cleaning or repair Be sure your hands are dry when handling the power cord or plug Electric shock or harm may occur Be sure the plug and socket are clean and the connection is tight Dust or incomplete connection may Grounding ...

Page 6: ...nplug the refrigerator Open the doors for ventilation There is danger of burning due to explosion and sparking Do not clean the refrigerator by spraying water inside or outside It may result in product damage shock This refrigerator is designed for use as a consumer home appliance only It is not a precision device for storing medication or valuables Do not install the refrigerator in a vehicle air...

Page 7: ...lacement parts should look parts and have the same electric rating Do not let moisture drop onto electrical parts If there is a problem in this area replace the parts or tape the wires to prevent contamination and degradation Note The images are for reference If you unplug the refrigerator or before plugging it back in or turning the power on Rapid cycling of the compressor could cause failure cup...

Page 8: ... Using these handles will ensure safety and reduce the possibility of injury Do not touch foods containers or the inside of the freezer compartment with wet hands Your hands may stick to the cold items It could cause frost bite Be careful to avoid pinching hands or feet when opening the doors under the bottom of the refrigerator Watch out for sharp edges Do not put live animals in the refrigerator...

Page 9: ... Door switch F Room R Room F Room fan motor Overload protective device Evaporator Conderser 4 2 3 Cyclo Pentane Forced method E ective inner capacity R Room Freezing cycle Parts related with dewing prevention Type of heat shield Eva oration F Room Product weight Kg Outer dimension W X D X H Method F Room F Room Cooling method F Room LRSES2706 MICOM Outside MICOM Outside Indirect cooling F Control ...

Page 11: ...t Door Depth Total with Door Open 90 Front Clearance 33 9 10 861 mm 35 9 10 912 mm 68 9 10 1750 mm 70 3 10 1785 mm 2 50 mm 28 7 10 730 mm 50 3 5 1285 mm 24 610 mm A B C D E F G H Model 27 cu ft B C D F G A E E E 11 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 13: ...top the function manually by pressing the button once more Indicates the set temperature of the freezer compartment in Fahrenheit F The default freezer temperature is 0 F Press the Freezer button repeatedly to select a new set temperature from 7 F to 5 F Indicates the set temperature of the refrigerator compartment in Fahrenheit F The default refrigerator temperature is 37 F Press the Refrigerator...

Page 14: ...n ice is not dispensed smoothly 2 4 Ice Plus Ice is lumped together Power failure The unit is newly installed 2 2 Automatic ice maker 3 47 8 2 4 4 16 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 14 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 15: ...y part of refrigerator performs re operation in the cycle of 30 minutes If normal operation is performed poor status is released and refrigerator returns to the initial status reset 1 The M C room fan motor performs ON OFF control by linking with the COMP 2 It controls at the single RPM without varying RPM 3 Failure sensing method is same with freezing fan motor refer to failure diagnosis function...

Page 16: ...y of def heater badness 7 F Fan abnormal FF E When Fan should be on Main PCB can not receive the feed back signal in 65s Fan lead wire badness Fan drive IC badness 8 C Fan abnormal CF E 9 Ice maker sensor abnormal IS E Ice maker Sensor Open or short Sensor lead wire or wafer badness 10 Ice maker Kit abnormal It E Ice maker Kit abnormal 11 Communication error CO E Communication between Main and dis...

Page 17: ...ser are mounted 1 This is function to dispense ice and water outside without opening doors 2 If pressing the Dispenser Pressing Switch after selecting ice cube ice Crushed ice or water relevant ice and water come out However when selecting ice the duct door is opened by electric Motor duct door Motor if pressing the Dispenser Pressing Switch The duct door is closed after it remains for 5 seconds i...

Page 18: ...e tray by operating the solenoid valve Κ To force water to supply to the ice tray or check icemaker s condition press and hold the FILL Key for about 3seconds In the test mode The icemaker will run through 3 stages step by step Harvest Fill water Ice making To reset the icemaker s operation set the power switch OFF position and back it to ON position Κ Waits until water becomes ice For cold air ci...

Page 19: ...and holding the Test Button for 3 seconds 3 The test works only in the Icemaking Mode This test works when the ejector and stainless lever is at the their original position It cannot be entered from the Harvest or Fill mode 4 After water is supplied the mormally CYCLE is followed Icemaking Checking full ice Harvest Fill Water Park Position CAUTION Icemaker working principles and repair 19 Copyrigh...

Page 20: ...This mode can compensate Freezer and Refrigerator room Input Press Freezer and Fridge bu on for 5seconds Opera on 1 Freezer and Fridge LED displayed 5 2 1 If press Freezer bu on Freezer LED is blinking If press Freezer bu on in LED blinking Freezer LED Number will be changed like below 2 2 If press Fridge bu on Fridge LED is blinking If press Fridge bu on in LED blinking Fridge LED Number will be ...

Page 21: ...default 1 1 2 Remarks 2 Freezer undercool compensation circuit 2 1 Communication circuit and connecting L wire between main PCB and display PCB L Wire FD H 4 wires Display PCB Main PCB DC 12V GND Receive NO TCH condition Send Error condition Main MICOM MICOM exclusively for LCD 21 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 22: ...f sensor resistance characteristics 2 J J J J J J J J 24 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 22 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 24: ... Variable Voltage Variable Frequency 1 Information of linear compressor 5 Safety Approval 2 Corresponding ControllerModel 3 StandardPrint Applied OLP THERMALLYPROTECTED Unused OLP PROTECTION ELECTRONIQUE LG DriveOnly ELECTRONICALLYPROTECTED LG DriveOnly 4 SerialNumber Example 1 Compressor Model FLE 165 N A M A FLE 165 16 5cc rev L LBP with R134a N LBP with R600a M 220 240V 50 60Hz A B C D A A Cont...

Page 25: ...Error Codes Step 1 Start up Half stroke interval for first 30 seconds Step 2 Ramp up Stroke increases every 0 8sec until maximum stroke length is reached about 3 min 15 sec Step 3 CVCF interval 180V 60Hz Step 1 Start up Half stroke interval for first 20 seconds Step 2 Ramp up Stroke increases until maximum stroke length is reached about 1 min 40 sec Step 3 VVVF interval target voltage and frequenc...

Page 26: ...tom occurs again after taking action for 2 replace the COMP component 7 LED blinking 7 time repeatedly PCB part defect IPM 1 After resetting the power check normal operation 2 When the same symptom occurs again after taking action for 1 replace the PCB 8 LED blinking 8 time repeatedly Communication error 1 After resetting the power check normal operation 2 When the same symptom occurs again after ...

Page 27: ...Current Voltage Sensing Error 2 Over Stroke 3 Comp Connection Error 4 Over Voltage Error 5 Comp Lock Error 6 Over Current Error 7 IPM Error 8 Communication Error 27 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 33: ...Co Sa Po Sa Save Po Power Co Common Point A Point B Point D Multi Tester Multi Tester Multi Tester Earth Hermetic terminal Mode Resistance Power Save C o S C S 33 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 34: ...hooting PCB 1 PCB Picture Main PCB P N EBR85624963 CON10 CON5 CON6 CON20 CON8 CON7 CON202 CON201 CON2 CON3 CON1_1 CON4 34 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 35: ...Short 0 Open OFF Other Normal 1 Freezer Sensor Error S ymptom Check Point Troubleshooting with Error Display CON8 23th pin 24 th pin Resistance ohm 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON8 35 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 36: ...esistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON8 CON8 CON8 23th pin 24 th pin Resistance ohm 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 36 Copyright 2020 LG Electronics Inc All rights r...

Page 37: ...e connection 2 Check Sensor Resistance Resistance Ω CON7 19th pin 20th pin Short 0 Open OFF Other Normal CON7 19th pin 20th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 CON7 37 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 38: ...r resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON7 19th pin 20th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 CON7 38 Copyright 2020 LG Electronics Inc All rights reserved Onl...

Page 39: ... Symptom Check Point Resistance Ω CON5 13th pin 14th pin Short 0 Open OFF Other Normal P N EBR85624963 CON5 13th pin 14 th pin Resistance ohm 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON5 CON5 39 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 40: ... N P 6 7 CON5 CON5 4 Resistance ohm 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 42 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 40 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 41: ...ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k P N EBR85624963 43 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 41 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 42: ...F 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON6 Ice Maker Connector CON6 44 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 42 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 43: ...nce Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k P N EBR85624963 45 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 43 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 44: ...0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 1 4 2 4M N P 2 4 Q P 4 Q 3 4 Q 9Q N P CON8 CON8 46 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 44 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 45: ...Resistance Ω 0 48 54 22k Voltage V 112V 116V Voltage V 0V 47 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 45 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 46: ...7Q 2 87 Voltage V 4 112V 116V 5 4 T W WN P Input Test 1 Mode Push the button 1 time 2 4M 6 7 CON3 CON3 Fuse M HTR L Cord HTR Sheat Fuse M Fuse M HTR L Cord HTR Sheat Fuse M 48 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 46 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 47: ...e V 10 12 VDC 2 4 5 VDC Not 0V 5V P N EBR85624963 49 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 47 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 48: ... 4 2 4 5 VDC 4 4 2 2 WN P 2 4M 7Q 2 87 Voltage V 4 10 12 VDC 5 4 2 32 W N 2 4M 6 7 CON8 CON8 7Q 2 87 Voltage V 4 Not 0V 5V 5 4 2 M W WN 4 P CON8 50 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 48 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 49: ...BR85624963 Voltage V 10 12 VDC 2 4 5 VDC Not 0V 5V 51 Copyright 2019 LG Electronics Inc All rights reserved Only training and service purposes 49 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 50: ... 20 th pin 2 4 5 VDC 4 Check the Fan Motor voltage Is Fan Motor voltage 10 12V Yes Replace Main PCB No TEST MODE 1 Voltage V CON8 11th pin 16 th pin 10 12 VDC 5 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V No Replace Main PCB No 6 Explain to customer CON8 CON8 TEST MODE 1 Voltage V CON8 11th pin 14 th pin Not 0V 5V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the...

Page 51: ...tage V CON101 4th pin 3rd pin Not 0V 5V Change the MainPCB 4 Check the voltage in display Is CON101 voltage as below Yes No Voltage V CON101 4th pin 2nd pin Not 0V 5V Change the Display PCB 5 Check the voltage in Main PCB Is CON5 15 th pin 17 th pin voltage 0V or5V Yes No Voltage V CON5 15th 17th pin Not 0V 5V Change the Main PCB 6 Check the voltage in Main PCB Is CON5 15 th pin 18 th pin voltage ...

Page 52: ...1 Check for a loose connection 1 EIt t n i o P k c e h C m o t p m y S P N EBR85624963 Housing Resistance Ω CON6 1st pin 2ndpin 19 7 CON6 12th pin 13th pin 0 5V CON6 52 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 53: ...nce as below No Yes Change the I M unit 3 Push the I M test Key and test the voltage in I M test mode Is the voltage as below No Yes Change the I M unit or Main PCB 4 Explain to customer I M motor Resistance ohm CON6 1st 2nd pin 19 7 Voltage V CON6 12th 13th pin Change between 0 5V CON6 53 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 54: ...Check Point 1 Check the loose connection 2 Check the resistance P N EBR85624963 Troubleshooting without Error Display 2 Crush mode doesn t work CON201 CON1_1 CON3 CON2 CON8 CON7 CON6 CON5 CON10 54 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 55: ...h pin 19th pin Not Pushing 0 2V CON6 23rd pin 24th pin When Push 11 5 12 5V maintain 1s Not Pushing 0 2V Auger Motor RT25 Resistance ohm 2 3 2 3 2 3 Duct Motor RT25 Resistance ohm 8 14ohm 3rd pin 19th pin 3rd 3rdpin 4th pin 4th pin 19th pin 23rd pin 24th pin 55 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 56: ...orresistance as below No Yes Replace duct Motor GearedMotor DispenserMotor LEVERS W Voltage V CON6 3rd pin 4th pin Not Pushing 0 2V CON6 27th pin 29th pin Not Pushing 0 2V CON6 19th pin Not Pushing 0 2V CON6 4th pin When Push 11 5 12 5V maintain 1s Not Pushing 0 2V Auger Motor RT25 Resistance ohm 2 3 2 3 2 3 Duct Motor RT25 Resistance ohm 8 14ohm CON6 3rd pin 19th pin 3rd pin 4th pin 19th pin 3rd ...

Page 57: ... Valve Machine Room Water Valve INSPECTION POINT Water LEVER S W Water Lever SW CON6 Pushing 0 2V Not Pushing 3 5 5V Pilot Valve CON3 Pushing 112 115V Not Pushing 0 2V Water valve CON3 Pushing 112 115V Not Pushing 0 2V Ground BL Water Valve RD Pilot Valve GY 17th pin 18th pin 2nd pin 11th pin 2nd pin 10th pin 57 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purpos...

Page 58: ...12 115V Not Pushing 0 2V Pushing 112 115V Not Pushing 0 2V Water mode doesn t work 2 Check the voltage while pushing the lever S W Is voltage correct compared with table No Yes 1 Check the loose connection 3 Check the voltage Valves voltage correct compared with table No Yes Change the PCB Change the PCB INSPECTION POINT LEVER S W RESULT Pushing 0 2V Not Pushing 3 5 5V CON6 CON3 Ice WaterLeverS W ...

Page 59: ...door S W resistance 3 Check the LED Lamp Resistance Ω Door S W Closed 0 Door S W LED Lamp Voltage V Blue Black Closed 0 2V Open 12V R Led Lamp INSPECTION POINT DOOR Voltage V CON7 7th pin 8th pin Close 0 2V Open 12V CON5 R Door S W CON7 R LED Supply CON7 CON5 59 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 60: ...k the PCB Voltage Is CON7 7th pin 8th pin voltage 12V No Yes Change the PCB 4 Check the LED Lamp voltage Is it 0 2V While door closed No Yes Change the Door S W 5 Check the LED Lamp voltage Is it 12V While door open No Yes Change the LED Lamp CON7 INSPECTION POINT DOOR Voltage V CON7 7th pin 8th pin Close 0 2V Open 12V Refrigeratorroom LED doesn t work 60 Copyright 2020 LG Electronics Inc All righ...

Page 61: ...eck the door S W resistance 3 Check the LED Lamp Resistance Ω Door S W Closed 0 LED Lamp Voltage V Blue Black Closed 0 2V Open 12V INSPECTION POINT DOOR Voltage V CON8 17th pin 18th pin Close 0 2V Open 12V CON5 CON8 CON5 CON7 LED MODULE 61 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 62: ...es Change the PCB 6 Explain to customer 4 Check the LED Lamp voltage Is it 0 2V While door closed No Yes Change the Door S W 5 Check the LED Lamp voltage Is it 12V While door open No Yes Change the LED Lamp INSPECTION POINT DOOR Voltage V CON8 17th pin 18th pin Close 0 2V Open 12V Resistance Ω Door S W Door Close 0 CON8 F LED Supply Freezer room LED doesn t work 62 Copyright 2020 LG Electronics In...

Page 63: ...ge CON6 R1SNR Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k Duct Status Air Flow Windy Air Temperature Cold Duct Fan Motor CON7 CON8 TEST MODE 1 Voltage V CON8 9 th pin 12 th pin 10 12 VDC CON8 9 th pin 19 th pin 2 4 5 VDC CON8 9 th pin 10 th pin Not 0V 5V 19th pin 20th pin CON7 CON8 63 Copyright 2020 LG Electronics Inc All rights reserved Only training and serv...

Page 64: ...k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 TEST MODE 1 Voltage V CON8 9th pin 19th pin 2 4 5 VDC 5 Check the Fan Motor voltage Is Fan Motor voltage 10 12V Yes Replace Main PCB No TEST MODE 1 Voltage V CON8 9th pin 12th pin 10 12 VDC 6 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V No Replace Main PCB No CON8 CON8 TEST MODE 1 Voltage V CON8 9th pin 10th pin Not 0V 5V 7 Check the Fan M...

Page 65: ...or voltage Duct Duct Status Air Flow Windy Air Temperature Cold Fan Motor CON8 23th pin 24 th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 5ºF 15ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON8 TEST MODE 1 Voltage V CON8 9 th pin 12 th pin 10 12 VDC CON8 9 th pin 19 th pin 2 4 5 VDC CON8 9 th pin 10 th pin Not 0V 5V 65 Copyright 2020 LG Electronics Inc All rights reserved Only train...

Page 66: ...k the Compressor and sealed system 5 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Fan Motor No CON8 CON8 23th pin 24 th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 5ºF 15ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 2 Open the fresh food door and Check the air flow D amper No Yes Check the dampe r Go to 4 66 Copyright 2020 LG Electronics Inc All r...

Page 67: ... 1 Voltage V CON8 9th pin 12th pin 10 12 VDC 7 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V No Replace Main PCB No CON8 CON8 TEST MODE 1 Voltage V CON8 9th pin 10th pin Not 0V 5V 8 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes CON8 67 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 68: ... Terminal Position Assurance TPA 1 time Comp Damper All FAN on All things displayed 2 times Forced defrost mode 22 22 displayed Main PWB 3 Reference 1 TEST MODE and Removing TPA 3 Wire Color BL Blue WH White BO Bright Orange BK Black BN Brown PR Purple RD Red GN Green SB Sky Blue GY Gray PK Pink AC TPA DC TPA 68 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purpos...

Page 71: ...hooting TEMP RESISTANCE VOLTAGE Wi Fi Modem Error E Od 1 Check the loose connection WiFi Module Error Od E 2 Change the Display PCB WiFi Connector CON104 71 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 72: ...reezer door 1 in arrow direction and disconnect the door from the lower hinge 2 Don t pull the door forward 5 Assembly is the reverse order of disassembly 2 Turn hinge lever in arrow A direction until it is loosened and take it out in arrow B direction counterclockwise two extra screws Tap Tite M6 Left Hinge attaching screw in the holes of the upper hinge 3 Disconnect upper hinge 1 from the hinge ...

Page 73: ...hanical Cover and Valve Screw 3 Turn o the water Then separate the water line from the valve Collet 5 Separate the housing and pull out the valve Mechanical Cover Tube Insert Line Clip Housing The assembly is in the reverse order of the disassembly and take special care for the following details 1 Be careful not to bend the tube during assembly 1 Remove screw connected to back panel and detach hoo...

Page 74: ...ocked by the hooking part When you cannot pull out the fresh compartment any more lift it up slightly to pull it out completely to the front side outer side 2 Hold the front of the Cover TV and Pull it out completely 3 Loosen 1 Screw on the Water Tank 4 Pull the water supply tube 1 in the back of the refrigerator 1 Hold the front of the Drawer and Pull it out completely Pull the water supply tube ...

Page 75: ...s it is heavy 3 Hold the home bar with 2 hands and separate the home bar by lifting it up from the door 1 Separate the H Bar Gasket adjacent to the Holder Lever and then unscrew three screws 2 Hold the Holder Lever and then pull left firmly to separate the Cover Front It is able to separate the Holder Lever if two screws placed on the back of the separated Cover Front are unscrewed 3 After unscrew...

Page 76: ...adjustment screw located on the bottom of the freezer hinge in clockwise direction to adjust the height 1 When the bottom part of refrigerator door unleveled 2 When the bottom part of freezer door unleveled 1 Put thr install plate under the rear corner of the refrigerator 2 Check the movement of the freezer 3 If the freezer does not fixed in screw the leg until it reaches on the floor 1 The same a...

Page 77: ... or heating sources near a refrigerant discharging hose Remove fire appliances or heating sources near a refrigerator Perform refrigerant discharge for more than 7 minutes Suction Pipe Discharge Pipe Pinch Plier Process Pipe Refrigerant ReturnBag Heavy Repair Method of Refrigerator by Application of Refrigerant Heavy Repair Method of Refrigerator by Application of Refrigerant 77 Copyright 2020 LG ...

Page 78: ...working time should be for more than 10 minutes Suction Pipe Vacuum Pump Discharge refrigerant outside using window or door Pinch Plier Process Pipe Discharge Pipe 1 3 Welding Repair Step Required equipment Simple welding machine Remove pinch pliers if remaining refrigerant returnis completed Cut the front part of a process pipe with a cutter Check that remaining refrigerant comes out Perform weld...

Page 79: ...en connect a charging tube with welding Charging Tube Suction Pipe Discharge Pipe 1 5 Vacuum Air Removal Required equipment Vacuum pump Connect a vacuum pump to a charging tube to perform vacuum cycle Vacuum work should be performed for an hour If vacuum time is short normal cooling performance may not be exerted due to failure of cooling cycle 79 Copyright 2020 LG Electronics Inc All rights reser...

Page 80: ...t remains the cooling cycle is normal Take care since a discharge pipe may be hot Heavy Repair Method of Refrigerator by Application of Refrigerant 1 8 Failure Checking Procedures Check of rotation of COMP Surface of cooler is cold Surface of cooler is cold Clogged capillary tube Leakage of welding part Check of leakage part Leakage of radiator Leakage of refrigerant Normal Clogged cycle Somewhat ...

Page 81: ...nnel at doorliner as shown in the illustration below 4 Using the lever principle Insert the Small Screw Driver applies a force to hole 5 Disconnect wire harness 3 Remove a Screw 6 Remove a screw Gasket Channel Gasket 81 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 82: ...cing the LEDs Cover Lamp is positively necessary 2 Tighten a screw to the cover 3 You should take LED lamps out and pull from the right 3 Pull a screw using a Plier and disassemble the cover 82 Copyright 2020 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 83: ...210A 210C 203A 201A EV EXPLODED VIEW FREEZER DOOR 619F ...

Page 84: ...233A 233C 231A 270F 264B 264D 264C 264E 239A 251C 251A 241D 212G 309G 287A 279E EV EXPLODED VIEW REFRIGERATOR DOOR ...

Page 85: ...128F 128E 128D 128C 332A 135J 131D 329A 301A 332B 330B 405A 404A 405D 149C 161C 136A 319B 281H 136B 316B 405G 903E 612A 158C 903G 135D 612B needs to be serviced together 612B 149A EV EXPLODED VIEW FREEZER COMPARTMENT ...

Page 86: ...271B 271C 128G 128H 120B 140A 154B 136C 154A 151A 281G 610E 120A 120D 623A 903D 158A 627E 903F EV EXPLODED VIEW REFRIGERATOR COMPARTMENT ...

Page 87: ...317A 318A 308A 411A 501F 501A 304A 103B 103B 312A 314A 314A 316A 307A 305C 305B 319A 105A 323B 619A 623A 329C 404B 319C EV EXPLODED VIEW MACHINE COMPARTMENT ...

Page 88: ...Sep 2020 MFL71760658 ...

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