LG LRSOC2306 Series Service Manual Download

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CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS
BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR .

REFRIGERATOR

SERVICE MANUAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,

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.

MODEL :
LRS

06*

Summary of Contents for LRSOC2306 Series

Page 1: ...ights reserved Only training and service purposes Any reproduction duplication distribution including by way of email facsimile or other electronic means publication 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 MODEL LRSOC2306 ...

Page 2: ...NS 4 COMP TRIP SUMMARY 5 TROUBLE SHOOTING 6 HEAVY REPAIR METHOD OF REFRIGERATOR BY APPLICATION OF REFRIGERANT 19 SPECIFICATION 26 CIRCUIT DIAGRAM 28 PCB PICTURE 29 TROUBLE SHOOTING WITHOUT ERROR DISPLAY 57 TROUBLE DIAGNOSIS 74 HOW TO INSTALL REFRIGERATOR 84 HOW TO SERVICE DOOR DISPLAY 90 HOW TO SERVICE FUNNEL ASSEMBLY 91 EXPLODED VIEW 93 TROUBLE SHOOTING 30 ...

Page 3: ...icularly in wet or damp area 6 Use standard electrical components when replacing them 7 Make sure the hook is correctly engaged Remove dust and foreign materials from the housing and connecting parts 8 Do not fray damage machine heavily bend pull out or twist the power cord 9 Please check the evidence of moisture intrusion in the electrical components Replace the parts or mask it with insulation t...

Page 5: ...ge Detect Pistion Lock 5 Piston Lock detect Pistion Lock 5 Piston Lock detect Over Current Detection 6 Over Current detect Current Detection 6 Over Current detect Current Detection 6 Over Current detect Fault Fo 7 IPM armshort detect IPM Fault detect Fault Fo 7 IPM armshort detect IPM Fault detect Fault Fo 7 IPM armshort detect IPM Fault detect Communication Error 8 Communication Error Communicati...

Page 6: ...g and service purposes Comp Operation Defect z PCB COVER OPEN Check the LED Blinking Information about LED blinking is following next page If the Comp Fan is not operated then input the test mode and check the comp condition Operation or not If It is normal condition then LED is not work ...

Page 7: ...ck Cycle leakage About 5min About 5min About 5min About 5min About 5min About 5min About 5min LED4 Blinks Replace PCB LED4 Blinks About 5min Reset Reset Reset Reset Reset Reset Reset Test Mode 1 Input Test Mode 1 Input Test Mode 1 Input Test Mode 1 Input Test Mode 1 Input Test Mode 1 Input Test Mode 1 Input Test Mode 1 Input PCBA Output 60V Replace PCB Replace PCB Check Cycle leakage Comp Operatio...

Page 8: ...poses Trip LED Bliking Information 1 FCT0 Trip and LED Blinking 1 time FCT0 Fault Blink OFF Blink OFF Purpose To detect the compressor voltage and current sensing error Restart every 30 seconds after compressor off LED 1 Blinks Replace PCB LED 1 Blinks About 5min Reset Test Mode 1 Input ...

Page 9: ... Æ Case 1 Do not operate Comp Harness connection failure between the PCB Comp Capacitor Æ Case 2 Do operate Comp intermittently Condenser Fan or Freezer Fan Error System Error like water clogging capillary clogging refrigerant leakage Æ Logic After the Comp Off every 1 minute restart Comp PCBA Output 60V N LED 2 Blinks Comp Operation Y Harness wiring Y Repair Harness N LED 2 Blinks Check Comp Cycl...

Page 10: ...revention Over Voltage and Over Current by detecting connection error check Æ Cause Harness connection failure between PCB Comp Capacitor Comp insulation breakdown Æ Logic After the Comp Off every 40 seconds restart Comp OFF Blink Blink Blink PCBA Output 60V N LED 3 Blinks Comp Operation Y Harness wiring Y Repair Harness N LED 3 Blinks Check Comp Cycle Cycle leakage About 5min Reset Test Mode 1 In...

Page 11: ...4 Over Voltage Trip and LED Blinking 4 times Over Voltage Trip Blink Blink Blink Æ Purpose Protection the PCB by Over Voltage Æ Cause Applying the Over Voltage to DC Link 450VDC or higher Æ Logic Restart every 90 seconds after compressor off OFF Blink LED 4 Blinks Replace PCB LED 4 Blinks About 5min Reset Test Mode 1 Input ...

Page 12: ...es Locked Piston Check Comp Y N LED 5 Blinks Comp Operation LED 5 Blinks Check Cycle leakage After 5Min Reset Test Mode 1 Input Blink OFF Blink Blink Blink Blink Æ Purpose Detect locked piston Æ Cause Oil shortage of the cylinder Cylinder or Piston damage clogging the discharge Comp internal debris Æ Logic After the Comp Off every 2 min 30 seconds restart Comp ...

Page 13: ...oad Æ Cause Abnormally ambient temperature Over 43 Abnormally conditions like Shield machine room etc Condenser Fan failure Comp failure PCB failure IPM breakdown Oil shortage of the cylinder Cylinder or Piston damage clogging the discharge Comp internal debris Æ Logic After the Comp Off every 6 minutes restart Comp N Y Comp Action Check Comp Check Cycle leakage Replace PCB Y N PCBA Output 60V LED...

Page 14: ...ion 7 IPM Fault Trip and LED Blinking 7 times IPM Fault Blink OFF Blink Blink Blink Blink Blink Blink Æ Purpose Protection Over Current by failure IPM IPM short Æ Cause IPM Short and failure Æ Logic After the Comp Off every 20 seconds restart Comp LED 7 Blinks Replace PCB LED 7 Blinks About 5min Reset Test Mode 1 Input ...

Page 15: ...8 times Communication Error Blink Blink Blink Blink Blink Blink Blink Æ Purpose Detection communication error with the Micom of the refrigerator control Æ Cause Communication Error Æ Logic Only LED blinking without the Comp Off Comp is operate command before communication error OFF Blink LED 8 Blinks Replace PCB Reset LED 8 Blinks About 5min Test Mode 1 Input ...

Page 16: ...urposes Check the PCB Output Æ Check output voltage from PCB to Compressor IPM Output check A Inverter Æ To judge whether there is any issue with the PCB operation check the PCB output voltage Normal Voltage 60 V or higher output at COMMON POWER or COMMOM SAVE Multi Tester SAMPLE SAMPLE ...

Page 17: ...on error Check the Resistance point B Check the Resistance point D Replace Compressor B D Connection error Check the Harness Y N N Y Y Y N N Check Comp terminal Harness failure Y N Y 1 Check the Harness connection 2 Check the Compressor Æ Step 1 Power off Step 2 Check the Resistance point A Step 3 Check the Harness INF ohm Step 4 Check the Resistance point B Step 5 Check the Resistance point D ...

Page 18: ...Check the broken down insulation Comp Save Earth resistance measurement Check insulation break down Multi Tester Co Sa Po Sa Save Po Power Co Common Point A Point B Point D Multi Tester Multi Tester Multi Tester The resistance can differ by few Ω depending on the surrounding temperature or operating condition Earth Mode Resistance Power ᐭ 5 6 9 Save ᐮ 9 14 FLD165NBMA FLD165NCMA ...

Page 19: ... GPS IFBWZ SFQBJS PG DZDMF Explosion concentration 8 8 4 Vol Burning temperature 494 1 3 Features of R600a Refrigerator Κ۷With refrigerant quantity of 60 or so for the refrigerator using R134a as refrigerant Κ۷Large vacuum level at suction pressure at low pressure side Κ۷COMP capacity of the refrigerator using R609a as refrigerant is large by 1 7 times than that of the refrigerator using R134a Κ۷L...

Page 20: ... All rights reserved Only training and service purposes 1 5 Heave Repair Work Tool R600a refrigerant Bombe Pinch Pliers Refrigerant Discharge Hose Refrigerant Return Bag Vacuum Pump Handy Welding Machine Charging Tube Leakage Tester Drier ...

Page 21: ... between 6sec through 12sec after powering ON to open all both sides of 3way valve Leave doors of a refrigerator so that they are not closed Connect pinch pliers with a refrigerant discharging hose Place the outlet of a refrigerant discharging hose outside Remove fire appliances or heating sources near a refrigerant discharging hose Always use a refrigerant returnbag for working at the contained s...

Page 22: ...oor Vacuum pump must operate outdoor Operate a vacuum pump in order to returnrefrigerant remained in the pipe Vacuum working time should be for more than 10 minutes 2 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 wel...

Page 23: ...o recharge R600a refrigerant after completing work and then connect a charging tube with welding Charging Tube COMP Suction Pipe Discharge Pipe 2 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 cooli...

Page 24: ...refrigerator to operate a compressor Measure Bombe weight after 5 through 10 minutes to check remained refrigerant quantity to complete charging of refrigerant After charging refrigerant never perform welding work or work using fire appliances Charging Tube COMP Suction Pipe Discharge Pipe 2 7 Leak Inspection and Cycle Check Required equipment Leakage checking machine foam and leakage inspection m...

Page 26: ...STAVIEW DID LED ITEMS SPECIFICATIONS NET WEIGHT kg 125 COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTE Full Automatic Heater Defrost INSULATION Cyclo Pentane COMPRESSOR Driver starting type Linear comp EVAPORATOR Fin tube type CONDENSER MC condenser REFRIGERANT R600a 64g DIMENSION CLEARANCE LRSOC2306 28 15 16 735 mm Depth A m m 2 1 9 2 3 9 2 5 3 Width B m m 0 5 7 1 2 ...

Page 30: ...0 PCB PICTURE Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes 7 1 Main PCB P N EBR328812 7 2 Display PCB P N EBR327666 CON1 CON201 CON9 CON5 CON7 CON4 CON3 CON101 ...

Page 33: ...ease make sure power off and discharge fully before you test ABNORMAL FLOW SENSOR ABNORMAL CRAFT ICE MAKER UNIT ABNORMAL CRAFT ICE MAKER SENSOR FLOW MOTOR FAULT OR WATER INUT LOW WATER PREESURE THE CRAFT ICE MAKER SENSOR SHORT OR OPEN gF IU THE CRAFT ICE MAKER STEP MOTOR FAULT OR HALL IC L WIRE SHORT FAULT MOTOR DRIVING CIRCUIT Id 17 18 19 ...

Page 35: ...F Other Normal 1 Freezer Sensor Error S ymptom Check Point Troubleshooting with Error Display CON4 17th pin 18th pin Resistance ohm 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes 35 ...

Page 36: ...e 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 CON4 17th pin 18th pin Resistance ohm 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k Copyright 2021 LG Electronics Inc All rights reserved ...

Page 37: ...onnection 2 Check Sensor Resistance Resistance Ω CON4 15th pin 15th pin Short 0 Open OFF Other Normal Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 37 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes CON4 15th pin 15th pin ...

Page 38: ...Sensor 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 CON4 15th pin 16th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 38 Copyright 2021 LG Electronics Inc All rights reserved Only tra...

Page 39: ...istance 1 Ert Symptom Check Point Resistance Ω CON7 17th pin 18th pin Short 0 Open OFF Other Normal Resistance ohm 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 39 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes CON7 17th pin 18th pin ...

Page 40: ... Sensor 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 17th pin 18th pin Resistance ohm 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 40 Copyright 2021 LG Electronics Inc All rights reserved Only ...

Page 41: ...P k c e h C m o t p m y S Resistance Ω CON1 15st pin 22thpin Short 0 Open OFF Other Normal Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 41 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes CON1 15st pin 22thpin ...

Page 42: ...e 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 CON1 15st pin 22thpin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 42 Copyright 2021 LG Electronics Inc All rights reserved ...

Page 43: ...heck Sensor Resistance Resistance Ω CON4 21th pin 22th pin Short 0 Open OFF Other Normal CON4 21th pin 22th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 43 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 44: ...ce Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k 1 Reconnect or repair the connector Is the Connector disconnected or loose between Main PCB and sensor Yes No 2 Check the Sensor resistance Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 44 Copyright 2021 LG Electronics Inc All rights reserved Only trainin...

Page 45: ...tuck Symptom Check Point 4 Check the PCB output voltage Part Resistance Ω FUSE M 0 Defrost Heater 48 54 Defrost Sensor 22k TEST MODE 2 Voltage V CON9 7nd pin 13th pin 112V 116V TEST MODE 1 Voltage V CON9 7nd pin 13th pin 0V 45 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 46: ...es 3 Check the Defrost control part Is Defrost Sensor resistance or OFF OFF 22kΩ Replace product Input Test 2 Mode Push the button 2 times Replace Main PCB NO TEST MODE 2 Voltage V CON9 7nd pin 13th pin 112V 116V 5 Check the Heater Voltage Is voltage 0V Yes Input Test 1 Mode Push the button 1 time Replace Main PCB No 6 Explain to customer Fuse M HTR L Cord HTR Sheat Fuse M Fuse M HTR L Cord HTR Sh...

Page 47: ...eck Point 2 Check the Fan Motor 2 Check the PCB Fan motor voltage TEST MODE 1 Voltage V CON3 13th pin 16th pin 10 8 13 2 VDC CON3 13th pin 14th pin 2 4 5 VDC CON3 13th pin 15th pin Not 0V 5V 47 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 48: ...14th pin 2 4 5 VDC 4 Check the Fan Motor voltage Is Fan Motor voltage 10 8 13 2V Yes Replace Main PCB No TEST MODE 1 Voltage V CON3 13th pin 16th pin 10 8 13 2 VDC 5 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V Yes Replace Main PCB No 6 Explain to customer TEST MODE 1 Voltage V CON3 13th pin 15th pin Not 0V 5V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the moto...

Page 49: ...and connector 2 Check the PCB Fan motor voltage t n i o P k c e h C m o t p m y S TEST MODE 1 Voltage V CON3 9th pin 12th pin 10 8 13 2 VDC CON3 9th pin 11th pin 2 4 5 VDC CON3 19h pin 10th pin Not 0V 5V 49 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 50: ...h pin 11th pin 2 4 5 VDC 4 Check the Fan Motor voltage Is Fan Motor voltage 10 8 13 2V Yes Replace Main PCB No TEST MODE 1 Voltage V CON3 9th pin 12th pin 10 8 13 2 VDC 5 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V Yes Replace Main PCB No 6 Explain to customer TEST MODE 1 Voltage V CON3 9th pin 10th pin Not 0V 5V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the ...

Page 51: ...e 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 Housing Resistance Ω CON1 26th pin 28th pin 19 7 CON1 17th pin 18th pin Change Between 0 5V 51 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 52: ...age in I M test mode Is the voltage as below No Change the I M unit or Main PCB Check the I M motor resistance Is resistance as below Change the I M unit Yes Yes 4 Explain to customer 52 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes Housing Resistance Ω CON1 26th pin 28th pin 19 7 Housing Voltage V CON1 17th pin 18th pin Change Between 0 5V ...

Page 53: ...1 Cube Crush mode doesn t work Symptom Check Point 1 Check the loose connection 2 Check the resistance Troubleshooting without Error Display 53 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 54: ... 0 2V CON2 20th pin 22th pin Not Pushing 0 2V CON2 14th pin 16th pin When Push 11 5 12 5V maintain 1s Not Pushing 0 2V Auger Motor RT25 Resistance ohm BK GY RD 2 3 BK WH 2 3 GY RD WH 2 3 Duct Motor RT25 Resistance ohm WH BK RD 8 14ohm 57 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 55: ...ser Motor resistance as below No Yes Replace duct Motor Geared Motor Dispenser Motor LEVER S W Voltage V CON2 18th pin 20th pin Not Pushing 0 2V CON2 18th pin 22th pin Not Pushing 0 2V CON2 20th pin 22th pin Not Pushing 0 2V CON2 14th pin 16th pin When Push 11 5 12 5V maintain 1s Not Pushing 0 2V Auger Motor RT25 Resistance ohm BL GY 2 3 BL WH 2 3 GY WH 2 3 Duct Motor RT25 Resistance ohm BK RD 8 1...

Page 56: ...390 1 2 3 4 Pilot Valve Machine Room Water Valve INSPECTION POINT Water LEVER S W Water Lever SW CON2 5th pin 6th pin Pushing 0 2V Not Pushing 3 5 5V Pilot Valve CON1 8nd pin 11th pin Pushing 19 2 28 8V Not Pushing 0 2V Water valve CON1 4nd pin 12th pin Pushing 19 2 28 8V Not Pushing 0 2V 59 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 57: ...n 11th pin Pushing 19 2 28 8V Not Pushing 0 2V Water Valve CON1 4nd pin 12th pin Pushing 19 2 28 8V 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 IC...

Page 58: ...h sticky 2 Check the 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 CON4 23th pin 24th pin Close 0 2V Open 12V 61 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 59: ...Change the Door S W Door S W 3 Check the PCB Voltage Is CON4 23th pin 24th 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 INSPECTION POINT DOOR Voltage V CON4 23th pin 24th pin Close 0 2V Open 12V 62 Copyright 2021 LG Electronics Inc All righ...

Page 60: ...y 2 Check the 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 F Led Lamp INSPECTION POINT DOOR Voltage V CON8 19th pin 20th pin Close 0 2V Open 12V 63 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 61: ...ON3 19th pin 20th pin voltage 12V No Yes 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 19th pin 20th pin Close 0 2V Open 12V Resistance Ω Door S W Door Close 0 64 Copyright 2021 LG Electronics Inc All righ...

Page 62: ...ticky 6 Check the Fan motor voltage CON4 R1SNR 15th pin 16th pin 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 Fan Motor TEST MODE 1 Voltage V CON3 13th pin 16th pin 10 8 13 2 VDC CON3 13th pin 15th pin 2 4 5 VDC CON3 13th pin 14th pin Not 0V 5V r 65 Copyright 2021 LG Electronics Inc All rights reserved Only traini...

Page 63: ...3ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k TEST MODE 1 Voltage V CON3 13th pin 15th 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 CON3 13th pin 16th pin 10 8 13 2 VDC 6 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V Yes Replace Main PCB No TEST MODE 1 Voltage V CON3 13th pin 14th pin Not 0V 5V 7...

Page 64: ...y 6 Check the Fan motor voltage Duct Status Air Flow Windy Air Temperature Cold CON4 17th pin 18th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 5ºF 15ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k TEST MODE 1 Voltage V CON3 13th pin 16th pin 10 8 13 2 VDC CON3 13th pin 15th pin 2 4 5 VDC CON3 13th pin 14th pin Not 0V 5V 67 Copyright 2021 LG Electronics Inc All rights reserved Only trai...

Page 65: ...heck 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 CON4 17th pin 18th 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 damper Go to 4 68 Copyright 2021 LG Electronics Inc All right...

Page 66: ...TEST MODE 1 Voltage V CON3 13th pin 16th pin 10 12 VDC 7 Check the Fan Motor voltage Is Fan PWM voltage 2 4 5V No Replace Main PCB No TEST MODE 1 Voltage V CON3 13th pin 16th pin Not 0V 5V 8 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes 69 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 67: ...tance Check Point Symptom Resistance Ω CON3 23st pin 31thpin Short 0 Open OFF Other Normal Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 70 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes CON3 23st pin 31thpin ...

Page 68: ...istance 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 CON3 23st pin 31hpin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 71 Copyright 2021 LG Electronics Inc All rights rese...

Page 69: ...oose connection 2 Check Sensor Resistance Check Point Symptom 72 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes 3 Check heater resistance Housing Resistance Ω CON3 26th pin 28th pin 19 7 CON3 23th pin 25th pin Change Between 0 5V ...

Page 70: ...isconnected or loose between Mani PCB and sensor Yes No 2 No 3 Push the I M test Key and test the voltage in I M test mode Is the voltage as below No Change the I M unit or Main PCB Check the I M motor resistance Is resistance as below Change the I M unit Yes Yes 4 Explain to customer Housing Resistance Ω CON3 26th pin 28th pin 19 7 Housing Voltage V CON3 23th pin 25th pin Change Between 0 5V ...

Page 71: ...ker kit Check Point Symptom 3 Check heater resistance Troubleshooting 1 Icemaking failure Resistance Upper HTR Red 14 1 16 3 Resistance Lower HTR White 14 1 16 3 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes 74 ...

Page 72: ...Troubleshooting 1 gF E 1 Check for a loose connection 2 Check Ice maker kit Check Point Symptom 3 Check heater resistance 8 2 Craft Ice maker Error gF E 75 ...

Page 73: ...ting PS Check the voltage during C Fan operation About AC 10V AC 230V BLACK RED 3 Check the COMP connector voltage Measure without pulling the HOUSING When the COMP FAN are not operating simultaneously force operate from the MAIN PCB in TEST MODE to check whether it is operating and then check the power of the COMP end to reset the power 1 COMP operation error Troubleshooting 1 2 3 4 76 Copyright ...

Page 74: ...ain 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 taking action...

Page 75: ... 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 78 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purpos...

Page 77: ...elow Yes No Voltage V CON101 16th pin 14rd pin Not 0V 5V Change the Main PCB 4 Check the voltage in display Is CON101 voltage as below Yes No Voltage V CON101 16th pin 12nd pin Not 0V 5V Change the Display PCB 5 Check the voltage in Main PCB Is CON5 15th pin 17th pin voltage 0V or 5V Yes No Voltage V CON5 15th 17th pin Not 0V 5V Change the Main PCB 6 Check the voltage in Main PCB Is CON5 15th pin ...

Page 78: ...2nd pin 3rd pin Not 0V 5V Change the Main PCB 4 Check the voltage in display Is CON101 voltage as below Yes No Voltage V CON101 1st pin 3rd pin Not 0V 5V Change the Display PCB 5 Check the voltage in Main PCB Is CON5 15th pin 17th pin voltage 0V or 5V Yes No Voltage V CON5 15th 17th pin Not 0V 5V Change the Main PCB 6 Check the voltage in Main PCB Is CON5 15th pin 18th pin voltage 0V or 5V Yes No ...

Page 85: ... door level difference It may be unleveled concerning installed condition of the floor 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 inscrew the leg until it reaches on the floor 2 2 When the bottom part of freezer door unleveled 1 The same as refrigerator room Install PLATE Shake ...

Page 86: ...ing the Stopper Door turn it and reassemble For every one round dot at the top the door protrudes by 0 5mm control structure position Open and close the door 2 3 time 4 Check door level of terminal differenc 5 control structure shape contact part Initial status 0 5 mm raised 1 mm raised 1 5 mm raised 89 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 87: ...raining and service purposes How to change Reed S W Remove screw Push the hook and Disassemble Reed Switch From Cover hinge Check Resistance of Reed S W if it is NG change it Number 3 Assemble Reed S W to hinge cover and Assemble Reed S W Housing Disassemble Housing ...

Page 88: ... Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes How to disassemble DID button Disassemble button lever by loosening a screw Loosen screw and remove cover of latch ...

Page 89: ...G Electronics Inc All rights reserved Only training and service purposes How to disassemble DID button Loosen a screw and pull out latch Loosen a screw and pull out holder Take reversed order for assembling the DID button ...

Page 90: ...by Flathead screwdriv 3 The assembly operations in the reverse order of disasse ly Should be attached by dubleside tape on Knock On sensor 2 Disassemble Knock On Sensor and wire housin 93 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 91: ...Tighten a screw to the cove 4 1 Push the flat screwdriver in the rear of the LED lamp and take the lamp out from the hook 2 Disassemble the combined housing with the flat screwd ver 3 You should take LED lamps out and pull from the righ 3 Pull a screw using a Plier and disassemble the cove 94 Copyright 2021 LG Electronics Inc All rights ...

Page 92: ...ay 1 Pull out Cover Display 2 Disassemble the harness housing 3 The assembly operations in the reverse order of disassembly It is assembled in a state of keeping the display horizontal After assembling Lightly tap display to combine Display Hook Caution After the wire is cleaned up check that you do not interfere with it and than combine Display ...

Page 93: ...poses How to service Funnel Assembly 1 Pull out Cover Display 2 Disassemble the harness housing Disassemble the screw 2 point Disassemble the harness housing and hose How to disassemble hose connector Push connecter and pull hose After Replace Funnel assembly The assembly operations in the reverse order of disassembly ...

Page 94: ...p duct motor Screw 3 Remove Cap duct Screw 4 Remove Cap duct Pull Lever and Pull out body left side 5 After replace cap duct assembly Lever into hook 6 Spring push front side and then Push body side 97 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 95: ...sembly 7 Screw Lever holder braket Check bracket direction 8 Screw Cap duct motor 9 Assembly Housing Cap duct housing Cap duct Heater housing 98 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 96: ... to service Display assembly 1 Screw on top of display 2 Grab the screw and lift with the nipper 3 Remove the housing 99 Copyright 2021 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 97: ...ights reserved Only training and service purposes How to disassemble DID Loosen two screw and remove a hinge by using tool be careful not to fall it down Lift DID with both hands and separate it from door Separate the housing only for GID Models ...

Page 98: ...om Upper 3 Loosen a screw at the back of Cover 4 Disassembly a harness housing at the back side of Cover 5 Disassembly a clamp with tube and plastic tube with joint tube Assemble 1 Assembly a clamp with tube and plastic tube with joint tube 2 Aassembly a harness housing at the back side of Cover 3 Fix a screw at the back of Cover 4 Push in Drawer Refrigerator Room Upper 5 Push in Cover TV ...

Page 99: ...raining and service purposes 1 Pull out Cover Freezer Room Upper 2 Loosen a screw at the top 3 Lift the back up pull it forward 4 Disassembly a harness housing at the top Assemble 1 Assemble a harness housing at the top 2 Push in Module 3 Fix a screw at the top 4 Assemble Cover Freezer Room Upper ...

Page 100: ...EXPLODED VIEW FREEZER DOOR PART 280B 279A 278C 201A 203A 613A EV 501G 210A 210A 131C 279C 113J 402C 612A 621A 206C 131D 180A 621A 616K ...

Page 101: ...EXPLODED VIEW REFRIGERATOR DOOR EV 233A 231A 205B 206C 287A 241C 241C 241B 241C ...

Page 102: ... A P M O C R E Z E E R F 149A 149C 154C 154D 136A 136D 332B 135J 329A 120B 404A 405D 405G 408A 270B 402A 402A 271A 128D 128C 332A 330B 500P 500Q 610F 502A 131A 131B 123A 135D EV 903E 281H 103B 319B 411A 500A 612B 301A 281B 103A ...

Page 103: ...EXPLODED VIEW REFRIGERATOR COMPARTMENT 140A 140A 140A 154B 136C 154A 136B 128G 128H 604F 604E 604H 120D 135J 271C 280A 615B 623D EV 903D 281G 103B 611B 611E 625A 627C 103A 615A ...

Page 104: ...EXPLODED VIEW MACHINE COMPARTMENT 105A 323B 307A 319A 305B 305C 305B 305C 316A 314A 317A 318A 319C 329C 404B EV 304A 619A 308A 312A ...

Page 105: ...P No MFL71760681 MAY 19 2021 ...

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LG LRSOC2306 Series, Service Manual

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Summary of Contents for LRSOC2306 Series

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