LG LHFS28XBS Series Service Manual

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REFRIGERATOR

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL: LHFS28XBS* /00 LHFS28XBS* /02

LHFS28XBS* /01

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.

MFL71752620_Rev01. 10302023

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Summary of Contents for LG LHFS28XBS Series

Page 1 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.
Page 2: Table Of Contents
Compressor Troubleshooting ..........................80~90 Icemaker Operating Method and Trouble Shooting ..................91~94 Ice Maker(Freezer Room) Operating Method and Trouble Shoot ..............95~97 Exploded view & Replacement Parts list ......................98~104 Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 3: Safety Warning And Cautions
There is danger of burning due to explosion and sparking. • Do not spray water inside or outside of the refrigerator. Bad insulation of electrical part may result in electric shock or fire. Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 4 • Do not install product at a place with much moisture and where water spatters. Deterioration of insulation may cause electrical leakage. Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 5 • Do not put the hands under the bottom of the refrigerator. The bottom side of the refrigerator is made of iron plate and so you may be damaged. Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 6: Specifications
56 1/4'' (1426 mm) 48 1/2'' (1232 mm) Drawer Open) Depth (Total with Door Open 90°) 48 5/8'' (1234 mm) 47 1/4'' (1199 mm) 43 1/2” (1103 mm) Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 7: Parts Identification
† This feature is only available on some models. automatically when it is open at an angle of less than 30°.) Ice Bin ❾ Stores ice from the freezer icemaker. Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 8: Disassembly
6. Place the door with the insides facing up, on a not scratch surface. Figure 1 Figure 3 Figure 2 Figure 4 Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 9: Door
Insert the cover assembly into bracket, door Door Gasket Removal ≆ 1. Remove gasket 3. Assemble 2 screws. Pull gasket free from gasket channel on the four remaining sides of door. Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 10: Sub Pcb For Working Dispenser
3. Reverse the Sub PCB cover. 3. Connect the capacitor housing. 4. Disconnect capacitor housing. 4. Insert the Sub PCB sideling. 5. Disconnect wire harness. 5. Assemble 1 screw. -10- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 11: Door Alignment
4. Remove the Fan Motor assembly by loosening 3 5) Disconnect the wiring harness. screws Fan motor Shroud 6) Remove all screws on the scroll assembly. -11- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 12: Defrost Control Assembly
Remove the Decor Duct with tools like flat-head 2) Remove the screw and cover screwdriver. filter. 3) Disconnect the lead wire on the bottom position. -12- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 13: Main Pwb
3. Disconnect wire harness and replace the main PWB in Cap Duct Motor the reverse order of removal. NG Position 4. Insert 3 screws. 5. Push housing aside. -13- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 14: How To Remove And Reinstall The Pullout Drawer
Step 6) Remove 2 screws of both side of supporter cover TV and disassembly the supporter cover TV. Step 3) Remove the two screws from the guide rails. (one from each side) -14- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 15 Step 8) Reinstall the lower basket, and close the freezer door. Step 4) Insert opposite gear ice into connector rail and screw them. -15- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 16: Water Valve Disassembly Method
(about 2 minutes.). NOTE : there maybe some water in the line. Collet Tube Insert Line Clip -16- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 17: Drawer Removal
Remove the screws from the rails at both ends. 5. Grip both sides of the drawer and pull it up to remove it from the rails. -17- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 18: How To Remove The Vegetable Drawer
2. Lift the vegetable drawer up and remove it by pulling it out. 3) Repeat to remove the second drawer. 4) Tilt the cover slightly and support it with both hands while pulling it out. -18- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 19: Adjustment
(2) Loosen two screws on comp base (3) Use a L-shaped flap tool to pry off the cover (4) Assembly in reverse order of disassembly -19- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 20: Circuit Diagram
77℉/25℃ 10.675K±5% (15.2Ω±7%) (15.2Ω±7%,12±7%) (2.55Ω±7%, GY/RD to WH) (2.55Ω±7%, WH to BK) (2.55Ω±7%, BK to GY/RD) (11Ω±10%) (72.7Ω±5%) (25.3Ω±5%) (180Ω±5%) (25.3Ω±5%) (180Ω±7%, 90Ω±7%) (25.3Ω±5%) (120Ω±5%) -20- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 21: Troubleshooting
Abnormality of BLDC signal isn't over 65 seconds Poor BLDC Motor connection, FAN Motor for during BLDC FAN motor DRIVE IC, and TR Freezer operating -21- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 22 Operation circuit Within I/M Kit, connection or resistance IceMaker Kit Upper HTR or Lower HTR on ** Diagnosis for Test S/W not the Icemaker is Open circuit working -22- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 23: Display Pcb
PCB Picture Main PCB (P/No. : EBR860937**) CON71 CON71 CON7 CON7 CON3 CON3 Display PCB (P/No. : EBR841464**) CON102 CON102 CON103 CON103 CON802 CON802 -23- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 25: Trouble Shooting
Resistance [Ω] Pin ~ 11 -22°F / -30°C -13°F / -25°C -4°F / -20°C 5°F / -15°C 14°F / -10°C 23°F / -5°C 32°F / 0°C -25- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 26 5°F / -15°C 14°F / -10°C 23°F / -5°C 32°F / 0°C Check the Sensor resistance. Replace the Is resistance OFF (Sensor refrigerator open)? Explain to customer -26- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 27 Pin ~ 17 Other Normal CON5 Resistance [Ω] Pin ~ 17 23°F / -5°C 32°F / 0°C 41°F / 5°C 50°F / 10°C 19.5k 59°F / 15°C -27- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 28 Is resistance 0Ω (Sensor Sensor short)? 50°F / 10°C 19.5k 59°F / 15°C Check the Sensor resistance. Replace the Is resistance OFF (Sensor refrigerator open)? Explain to customer -28- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 29 Resistance [Ω] Pin ~ 2 -22°F / -30°C -13°F / -25°C -4°F / -20°C 5°F / -15°C 14°F / -10°C 23°F / -5°C 32°F / 0°C -29- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 30 Check the Sensor resistance. Change the Sensor Is resistance 0Ω (Sensor short)? Explain to customer Check the Sensor resistance. Replace the Is resistance OFF (Sensor refrigerator open)? -30- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 31 Pin ~ 9 Other Normal CON5 Resistance [Ω] Pin ~ 9 23°F / -5°C 32°F / 0°C 41°F / 5°C 50°F / 10°C 19.5k 59°F / 15°C -31- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 32 Check the Sensor resistance. Change the Sensor Is resistance 0Ω (Sensor short) Explain to customer or resistance Infinity Ω (Sensor open)? Check the Sensor resistance. Is resistance normal? -32- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 33 (1) Pin2, (2) Pin5, (3) Pin8 CON3 CON3 CON4 CON4 CON5 CON5 CON2 CON2 (P/No. : EBR881246**) CON3 CON3 CON4 CON4 CON5 CON5 CON2 CON2 -33- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 34 Ice maker kit The voltage (1)~(3) point 11~12V? (P/No. : EBR881246**) (1) Pin2, (2) Pin5, (3) Pin8 CON3 CON3 CON4 CON4 CON5 CON5 CON2 CON2 -34- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 35 34 ~ 42 22k↑ Defrost Sensor TEST MODE 3 Voltage [V] CON7 112V ~ 116V pin ~ 12 TEST MODE 1 Voltage [V] CON7 pin ~ 12 -35- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 36 Is Defrost Sensor resistance 22kΩ↑ or OFF? Fuse-M Defrost SNR TEST MODE 1 Voltage [V] Defrost Heater CON7 pin ~ 12 22kΩ↑ Explain to customer -36- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 37 CON71 CON7 CON7 CON3 CON3 CON3 TEST MODE 1 Voltage [V] CON7 Pin ~ 5 CON3 0V<Voltage<5V Pin ~ 5 CON3 0V<Voltage<5V Pin ~ 5 -37- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 38 CON3 Fan motor Rotate fan using hand. It feel sticky? TEST MODE 1 Voltage [V] Fan Motor CON3 0V<Voltage<5V Pin ~ 5 Explain to customer -38- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 39 CON71 CON7 CON7 CON3 CON3 CON3 TEST MODE 1 Voltage [V] CON3 Pin ~ 9 CON3 0V<Voltage<5V Pin ~ 9 CON3 0V<Voltage<5V Pin ~ 9 -39- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 40 CON3 Fan motor Rotate fan using hand. It feel sticky? TEST MODE 1 Voltage [V] Fan Motor CON3 0V<Voltage<5V Pin ~ 9 Explain to customer -40- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 41 CON7 CON3 CON3 CON3 Fan Motor TEST MODE 1 Voltage [V] CON3 Pin ~ 1 CON3 0V<Voltage<5V Pin ~ 1 CON3 0V<Voltage<5V Pin ~ 1 -41- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 42 CON3 Fan motor Rotate fan using hand. It feel sticky? TEST MODE 1 Voltage [V] CON3 0V<Voltage<5V Pin ~ 1 Fan Motor Explain to customer -42- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 43 Not 0V, 5V Pin ~ 6 CON101 Pin ~ 6 Housing Voltage [V] CON6 Not 0V, 5V Pin ~ 9 CON6 Not 0V, 5V Pin ~ 9 -43- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 44 Pin ~ 9 CON101 Not 0V, 5V voltage 0V or 5V? Pin ~ 6 Housing Voltage [V] CON6 Not 0V, 5V Pin ~ 9 Explain to customer -44- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 45 1. Check the loose connection work 2. Check the resistance CON1 CON3 CON3 CON4 CON4 CON5 CON5 CON2 CON2 Ice Maker Geared Motor Dispenser Motor (BLDC Type) -45- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 46 Pin, 5 2.37 ~ 2.73 Ω Pin, 28 Pin, 28 Pushing Voltage [V] The LEVER S/W CON1 CON5 Pin, 5 5V ± 10% Pin, 5 -46- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 47 Pin, 5 Case 5V ± 10% Assembly, CON1 CON5 Voltage [V] (Loc.500C) Pin, 5 Explain to the customer 24V Enable 5V ± 10% (Refrigerator is OK) -47- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 48 1. Check the loose connection work 2. Check the resistance CON1 CON3 CON3 CON4 CON4 CON5 CON5 CON2 CON2 Ice Maker Geared Motor Dispenser Motor (BLDC Type) -48- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 49 Pin, 27 Pin, 5 2.37 ~ 2.73Ω Pin, 28 Pin, 28 Pushing The Voltage [V] LEVER S/W CON1 CON5 Pin, 5 5V ± 10% Pin, 5 -49- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 50 5V ± 10% Case CON1 CON5 Assembly, Voltage [V] Pin, 5 (Loc. 500C) 24V Enable 5V ± 10% Explain to the customer (Refrigerator is OK) -50- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 51 CON5 CON2 CON2 LEVER S/W Voltage [V] Pushing 20.4V ↑ CON5 Pin & 33 0~2V Pushing Pushing 20.4V ↑ CON4 Pin & 6 0~2V Pushing -51- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 52 Pin & 33 0~2V Pushing Pushing 20.4V ↑ CON4 Pin & 6 0~2V Pushing Water Valve Resistance [Ω] Water valve 24.03 ~ 26.56 Explain to customer -52- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 53 CON7 CON3 CON3 S/W Resistance [Ω] Open Infinity Door Close Voltage [V] CON5 Pin ~ 7 LED Lamp Voltage [V] Closed 0~2V White~ Yellow Open -53- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 54 Open Infinity Door Close Check the PCB Voltage. Change the Is CON5 8 Pin ~ 7 voltage 12V? CON5 Voltage [V] CON5 Pin ~ 7 -54- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 55 S/W Resistance [Ω] Open Infinity Door Closed Voltage [V] CON3 Pin ~ 13 F-Door LED Lamp Voltage [V] White ~ Black Open Close White ~ Black 0~2V -55- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 56 S/W Resistance [Ω] Open Infinity Door Closed Check the PCB Voltage. Change the Is CON3 14 Pin ~ 13 Voltage 12V? Voltage [V] CON3 Pin ~ 13 -56- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 57 CON3 8 Pin ~ 5 CON3 6 Pin ~ 5 0V<Voltage<5V CON3 7 Pin ~ 5 0V<Voltage<5V Duct Status Air Flow Windy Air Temperature Cold -57- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 58 270 ~ 330 Ω It's normal (1) To (2) Other Change damper 270 ~ 330 Ω It's normal (3) To (4) Other Change damper Explain to customer -58- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 59 CON3 8 Pin ~ 5 CON3 6 Pin ~ 5 0V<Voltage<5V 0V<Voltage<5V CON3 7 Pin ~ 5 Duct Status Air Flow Windy Air Temperature Cold -59- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 60 Test1 Mode. (Push the button 1 time) Check the Open the fresh food door and Fan Motor Check the air flow. Windy? Go to 5 -60- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 61 Check the Fan Motor voltage. Change the Is Fan Feed Back voltage right? motor TEST MODE 1 Voltage [V] CON3 6 Pin ~ 5 0V<Voltage<5V Explain to customer -61- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 62 Wi-Fi PCB CON802 CON802 CON802 Wi-Fi ON Voltage [V] CON802 Pin ~ 4 CON802 0V, 5V Pin ~ 4 CON802 0V, 5V Pin ~ 4 -62- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 63 Explain to the customer Change Check the Wi-Fi PCB output? Wi-Fi (While Wi-Fi function is on) modem Voltage Wi-Fi modem Pin ~ 6 0V, 5V -63- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 64 Upper HTR (Red) 14.1 ~ 16.3 Ω 2. Ice making Failure More cloudy ice Resistance Lower HTR (White) 14.1 ~ 16.3 Ω Shape like lump on ice -64- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 65 Symptom Check Point ① The LG Refrigerator displays an error code on the display for sealed system problem. Through this error code(E CH or E CL), please follow svc process. ② Through Step1 using SVC App, you can know it is compressor or sealed system problem, or you can know it is normal (customer's emotional fault).
Page 66 Parts pressure side ⑧ ⑧ compressor & drier with drier check Parts check Not Found Not Found Replace drier Replace drier ⑨ ⑨ Finish Finish -66- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 67 Not 0V, 5V Pin ~ 9 CON1 2 Pin ~ Not 0V, 5V CON5 6 CON1 12 Pin ~ Not 0V, 5V CON5 6 Sub CON1 -67- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 68 Is CON102 3 Pin ~ 9 CON5 6 voltage 0V or 5V? Housing Voltage [V] CON102 Not 0V, 5V Pin ~ 9 Explain to the customer -68- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 69: Test Mode And Removing Tpa
(33 33 displayed) 2. How to remove Terminal Position Assurance (TPA) <AC TPA> <DC TPA> ※ After measure the values, you should put in the TPA again. -69- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 70 0.81 V 77°F (25°C) 2.54 kΩ 0.67 V 86°F (30°C) 2.07 kΩ 0.56 V 95°F (35°C) 1.69 kΩ 0.47 V 104°F (40°C) 1.39 kΩ 0.39 V -70- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 71 1.64 V 77°F (25°C) 10.74 kΩ 1.45 V 86°F (30°C) 8.89 kΩ 1.27 V 95°F (35°C) 7.40 kΩ 1.10 V 104°F (40°C) 6.20 kΩ 0.96 V -71- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 72 At this point, the process will be repeated until the fan motor operates normally. If normal operation is achieved, the error display is erased and the MICOM is reset automatically. -72- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 73: Component Testing Information
When check the ohm at other temperatures (1) to (2) Check the sensor manual. Standard Sensor (at room temperature) Test Point Result (1) to (2) 11 kΩ -73- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 74: Sheath Heater
But if the ohm meter indicate infinity the Sheath heater is bad. Standard Sheath heater (at all temperature) Test Point Result(Ω) (1) to (2) 34 ~ 42 Ω -74- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 75: Door Heater Assembly
The heater is designed to prevent the raising dew from door. How to Measure Standard Test Point Result(Ω) (1) to (2) 1.9 ~ 2.2 kΩ -75- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 76 Dispenser DC Motor : When customer push the dispenser button, Pull duct door and abstract from ice bank. How to Measure Dispenser DC Motor Standard Dispenser DC Motor Test Point Result (1) to (2) 9.9 ~ 12.1 Ω -76- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 77: Ac Motor Assembly
Standard Geared Motor Test Point Result (1) to (2) 31.1 ~ 42.09 Ω (1) to (3) 31.1 ~ 42.09 Ω -77- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 78 Check to see if there is electrical current, if there is resistance the damper is good. Standard Damper Test Points Result Test Points Result Red and Yellow 373 ~ 456 Ω Blue and White 373 ~ 456 Ω -78- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 79: Flow Sensor
Count the water quantity from city water to water filter in refrigerator How to Measure Flow Sensor (in machine room) Standard Test Points Result Red wire to Black wire 4 ~ 30 kΩ -79- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 80: Compressor Troubleshooting
1 Input change Comp Comp OK Cycle Replace PCB Comp Check Test Mode Comp. Comp Leak? Check? 1 Input change Comp OK Cycle Replace PCB Check -80- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 81 → Logic: Comp Off & restart every 240s LED Blink Power Off Test Mode LED Blink Replace PCB 2 time & wait 7M 1 Input 2 time -81- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 82 → Logic : Comp. Off & restart every 330s LED Blink Power Off Test Mode LED Blink Comp. 5 times & wait 7M 1 Input 5 times Operation? Cycle Check Comp. Check -82- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 83 → Logic : Comp. Off & restart Every 300s LED Blink Power Off Test Mode LED Blink Replace PCB 7 times & wait 7M 1 Input 7 times -83- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 84 Test Mode LED Blink 9 times & wait 7M 1 Input 9 times Comp OK Comp Leak? Check? Comp NG Cycle Comp. Replace PCB Check Change -84- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 85 Step 2. Check the Resistance(U-V,V-W,W-U Every Resistance) Step 3. Check the Harness(INF ohm). Power Resistance check Harness check Harness OK (point A) Compressor Harness Check the terminal Change of Compressor -85- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 86 ※ There are some probability that values are some different because of the environment condition. Multi Tester Earth ② Insulation broken check ① Multi Tester Hermetic terminal -86- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 87 Is frost pattern Comp,Cond T > uniform? Ambient temp+5deg Is frost patern Uniform? Sealed Sealed System is OK Heavy repair System is OK -87- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 88: Service Diagnosis Chart
Check the refrigeration system. The system is faulty. Perform sealed system repair. The operation of the Thermistor Check the Thermistor. Replace the Thermistor. is incorrect. -88- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 89: Refrigeration Cycle
• Use a vacuum cleaner with a soft brush to clean the grille, the open areas behind the grille and the front surface area of the condenser. • Replace the mechanical cover. -89- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 90: Sealed System Diagnosis
Compressor Not Trace of Oil Pumping Leak Undercharge (The equalization test is trying to restart a compressor using a start kit after it has been operating.) -90- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 91: Icemaker Operating Method And Trouble Shooting
: Harvest → Fill water → Ice making To reset the icemaker’s operation, set the power switch OFF position and back it to ON position. Icemaker Unit -91- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 92: Icemaker Functions
2. At least 24 hours must be passed to have ice bin full of ices. (not in case of make ices? installation) If the issue haven’t resolved yet, though you have checked all the items above, go to next step. -92- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 93 Press the fill key for about 3sec. If the icemaker runs 2 stages of harvest and filling water step by step, It means icemaker's mechanism is normal. CAUTION Be sure that the ice tray is not filled with water before pressing fill key. -93- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 94 - Cap duct doesn’t seal the air properly. → Resolution : Possibly, warm air could get into the compartment and make ices get stuck. Replace the cap duct with new one. -94- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 95: Ice Maker(Freezer Room) Operating Method And Trouble Shoot
※ Before you carry out the test mode, - Check the error code on display and follow 13-3 - Check if the power switch is ON Test Button Feeler arm Power switch -95- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 96 1min. Could not proceed to *E IU error code No Tray position signal water supplying and Change Icemaker freezing mode Never stop movement -96- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 97 4) If no button is pressed for over 5 seconds, the mode, which was shown on display at last, will be saved and the mode will work maximum 30 hours after the setting. -97- Copyright © 2023-2024 LG Electronics Inc. All rights reserved. Only training and service purposes...
Page 98: Exploded View & Replacement Parts List
#EV# Exploded view & Replacement Parts list Exploded view & Replacement Parts list CASE PARTS CAUTION: Use the part number to order part, not the position number. 411A 610F 503E 409D 501F 501A 103B 207B 610D 158A 103A 207A 120A 271B 626A 402A...
Page 99: Freezer Parts
#EV# Exploded view & Replacement Parts list FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 145C 133C 131A 146C 136C 136B 133A 132P 145F 237C 136A...
Page 100: Refrigerator Parts
#EV# Exploded view & Replacement Parts list REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 141A 139A 141C 139B 141E 141B 141A 139A 141C 139B 141E 141B 141D 151A 161C 146B 151B 162B 146C 145D 162A...
Page 101: Door Parts
#EV# Exploded view & Replacement Parts list DOOR PARTS CAUTION: Use the part number to order part, not the position number. 500C 231B 233B 241D 241K 233A 231A 235A 212G 241K 241D 241K 241D 244A 312B 243D 243A 244A 619B 243E 262C 615A...
Page 102: Dispenser Parts
#EV# Exploded view & Replacement Parts list DISPENSER PARTS CAUTION: Use the part number to order part, not the position number. Related on location number of (*) mark, It's same with producted by China Model. So that parts are supplied by China, Please refer to the list.
Page 103 #EV# Exploded view & Replacement Parts list VALVE & WATER TUBE PARTS CAUTION: Use the part number to order part, not the position number. 623B 625A 616J 623B 616J 627A 619A 603B...
Page 104 #EV# Exploded view & Replacement Parts list ICE MAKER & ICE BIN PARTS CAUTION: Use the part number to order part, not the position number. Related on location number of (*) mark, It's same with producted by China Model. So that parts are supplied by China, Please refer to the list.

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