LG LRFCS25D3 Series Service Manual

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Owner's manual (60 pages)

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REFRIGERATOR

SERVICE MANUAL

CAUTION

PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL

BEFORE CHECKING OR OPERATING THE REFRIGERATOR.

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.

Models:

LRFCS25D3* /00

CONFIDENTIAL

* Color

Table of Contents

Troubleshooting

Summary of Contents for LG LRFCS25D3 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
3. Take caution not to get water near any electrical components. 4. Use exact replacement parts. 5. Remove any objects from the top prior to tilting the product. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 3: Specifications
Ice Tray (2) + Ice Bin Ice Tray & Bank Tray Drawer (F/U) Yes (Full Width) Tray Drawer (F/C) Tray Drawer (F/L) Yes (plastic) Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 5: Parts Identification
(The door only Durabase and Durabase Divider closes automatically when it is open at an angle of Provides storage for large food items. less than 30°.) Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 6: Disassembly
2. Insert mullion into channel. be careful that the door does not fall forward. Inserting mullion assy’ into bracket, door. 3. Assemble 2 screws. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 7: Door Alignment
2. Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap. (Figure 2) DEFROST-CONTROL GRILLE ASSEMBLY ASSEMBLY Figure 2 Figure 1 Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 8: Lamp
Center of Duct Multi and cover filter 3. Grab the bottom of 4. Disconnect the lead wire multi duct and remove it. on the bottom position. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 9: How To Remove And Reinstall The Pullout Drawer
Third: Remove the gear from the right side by following the same steps for the left side. NOTE: THIS TAB MUST BE PUSHED IN TO RELEASE THE GEAR. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 10 Step 6) Reinstall the two screws into the guide rails Step 7) Reinstall the lower basket, and close the freezer (one from each side). door. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 11: Pull Out Drawer
2. To install, slightly tilt up the front and insert the drawer into the frame and push it back into push it back place. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 12: Adjustment
(1)Remove the Cover Back M/C (2)Remove two screws on comp base (3)Use a L-shaped flap tool to pry off the cover. (4)Assembly in reverse order of disassembly. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 13: Circuit Diagram
DE PUERTA R Y FUSIBLE-M EN EL DIAGRAMA DE CIRCUITO ESTAN SUJETOS A CAMBIO EN DIFERENTE LOCALIDAD Y TIPO DE MODELO. LAS PARTES OPCIONALES ESTAN REPRESENTADAS CON LINEAS PUNTEADAS. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 14: Pcb Picture
6. PCB PICTURE 6-1 Main PCB & CON2 CON3 CON1 CON5 EBR811827** (2019.07~) CON201 CON7 CON4 Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 16: Troubleshooting With Error Display
10.5 ~ 9.5 23°F / -5°C 8 ~7.5 32°F / 0°C ※ The sensor is determined by the temperature. For example, 23 indicates -4°F. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 17 20 ~ 19 50°F / 10°C 16 ~15.5 59°F / 15°C ※ The sensor is determined by the temperature. For example, 30 indicates 32°F. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 18 10.5 ~ 9.5 23°F / -5°C 8 ~7.5 32°F / 0°C ※ The sensor is determined by the temperature. For example, 23 indicates -4°F. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 19 50°F / 10°C 20 ~ 19 16 ~15.5 59°F / 15°C ※ The sensor is determined by the temperature. For example, 23 indicates -4°F. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 20 Result SVC Action 112 ~ 116 V Go to the 5 Replace Main PCB Release the test mode. Push the button 1 times. (Normal) Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 21 7-5 Defrost Heater Error (dH E) & Check voltage between wires Brown to Blue. Result SVC Action Explain to customer 112 ~ 116 V Replace Main PCB Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 22 12th pin~14th pin CON7 0 or 5 V Change the PCB 14th pin~16th pin CON7 Change the motor 0 or 5 V 12th pin~14th pin Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 23 4th pin~6th pin CON7 Change the PCB 0 or 5 V 6th pin~8th pin CON7 Change the motor 0 or 5 V 6th pin~2nd pin Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 24 SVC Action 2. Check voltage between wires Orange to Red/White. 0 V or 5 V Change the Display PCB Other Go to the 6 Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 25 & Check voltage between wires White/Red to White/Black Result SVC Action 0 V or 5 V Change the Main PCB Other Explain to customer Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 26: Troubleshooting Without Error Display
2-. Check voltage between wires Red to Closed Black Other Change the Door S/W 12 VDC Explain to customer Open Other Change the LED Lamp Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 27 1.- Check for loose connection in CON7 2. Check voltage between wires Brown/White 12 V Go to the 4 Normal to Yellow/Black. Other Change the PCB Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 28 0 ~ 2 V Explain to customer Closed Gray Other Change the Door S/W 12 V Explain to customer Open Other Change the LED Lamp Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 29 (Go to the 8-4 point 5) Check the air temperature. Status SVC Action Cold or not ? Cold Explain to customer Check the Compressor Not cold And sealed system Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 30 (Go to the 5) Check the air temperature. Status SVC Action Cold or not ? Cold Explain to customer Check the Compressor Not cold And sealed system Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 31 12th pin~14th pin CON7 Change the PCB 0 or 5 V 14th pin~16th pin CON7 Change the motor 0 or 5 V 12th pin~14th pin Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 32: Reference
(33 33 displayed) 2. How to remove Terminal Position Assurance (TPA) < > < > After measure the values, you should put in the TPA again. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 33 2.54 ㏀ 77°F (25°C) 0.67 V 2.07 ㏀ 86°F (30°C) 0.56 V 1.69 ㏀ 95°F (35°C) 0.47 V 1.39 ㏀ 104°F (40°C) 0.39 V Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 34 10.74 ㏀ 77°F (25°C) 1.45 V 8.89 ㏀ 86°F (30°C) 1.27 V 7.40 ㏀ 95°F (35°C) 1.10 V 6.20 ㏀ 104°F (40°C) 0.96 V Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 35 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. No signal Error Display Normal drive No signal Repeat Pause 30min Pause 30min Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 36: Component Testing Information
Fuse-M (at all temperature) Sensor (at room temperature) Test Point Ressult Test Point Ressult (1) to (2) 0 ~ 0.1Ω (1) to (2) 11Ω Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 37 But the ohmmeter indicate infinitely great Sheath heater is disconnection Standard Sheath heater (at all temperature) Test Point Ressult (1) to (2) 34 ~ 42Ω Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 38 Standard Damper Test Points Result Test Points Result Red and Yellow 373 ~ 456Ω Blue and White 373 ~ 456Ω Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 39 If there is resistance, it means the switch not inferiority Standard Multimeter beep – Switch F,R Nomal Push the button(Plunger) Beep or 0Ω None (∞Ω) Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 40 When the door open, internal contact operate on and off moving plunger of door switch up and down. How to Measure Standard Status Result ∞Ω No magnet near the Switch Magnet is near the Switch 1Ω↑ Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 41: Troubleshooting
Stroke Controls the A-Inverter VVVF Modulation algorithm System according to various conditions. **VVVF : Variable Voltage Variable Frequency **CVCF : Constant Voltage Constant Frequency Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 42 |Vm, Im|> 2.5V+20% @ COMP off Stroke |Stroke|>17.5mm No Connect |Stroke|<=9.4mm & While 4 seconds |AC Current|<0.05A Lock |AC Current|>1.0A & |Stroke|<3.0mm 150s Current |Current|>3Ap 360s Communication Error Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 43 ≒ Y& V 200 Replace driver Comp Ref. Refer Display & sound FMA102NBMA(A-Inverter) TEST1 Forced Starting TDC (Full Stroke) Display ON, Buzz 1 time Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 44 This step shows the source voltage of the driver PC board. Step 1. Open PCB Cover Step 2. Check Driver PCB * Driver PCB located in machine room. Tester Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 45 Check C intermittently Cycle Cycle Check E Compressor Replace Damage Reset compressor Repeat Stroke trip Check C power check procedure occur? Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 47 Replace Damage Compressor Check Reset Repeat Current trip Power Check Procedure occur? Compressor Replace Cycle blockage? Compressor Doesn’t works Sealed system Cycle check Repair Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 49 Sa: Save Multi Multi Po: Power Tester Tester Co: Common Mode Resistance Power( Point B Save( Point A Multi Tester Earth Multi Tester Hermetic terminal Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 51 Check the The system Perform sealed refrigeration system. is faulty. system repair. Check the The operation of the Replace the Thermistor. Thermistor is incorrect. Thermistor. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 52 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. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 53 Pumping Trace of Oil Leak Undercharge (The equalization test is trying to restart a compressor using a start kit after it has been operating.) Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 54: Ice Maker And Dispenser Working Principles And Repair
1. Turning the Icemaker stop switch off (O) stops the Icemaking function. 2. Setting the Icemaker switch to OFF and then turning it back on will reset the Icemaker control. Power Feeler Switch Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 55 When the TRAY becomes horizontal , the cycle starts to repeat. Water Supply – Ice making – Ice ejection – TRAY returns to Horizontal. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 56 -8°-0° -10° -32° -41° -53° -58° -80° Lock Lock Ice ejection Icemaking original point 2±1 sec Horizontal 9±3 sec Level Return Conditions Conditions 8±3 sec Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 57 12-2-6 Ice maker stop switch • Ice Maker Stop S/W ON state, Ice Maker normal operation • Ice Maker Stop S/W OFF state: Ice Maker do not operate Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 58 4. After replacing the filter, press and hold the Light/ Water Filterbutton for more than 3 seconds.After then water Filter icon turn off with reset status. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 59 3. Defrosting stops if the sensor temperature reaches 8°C or more. If the sensor doesn’t reach 8°C in 1 hours, the defrost mode is malfunctioning. 4. Defrosting won’t function if its sensor is defective (wires are cut or short circuited) Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 60 In 7 min. In 10 min. Total load Compressor Freezer fan Reset to normal operation from test mode **Pillar Heater only apply in 3D/4D Models. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 61 ”, “IS ”, “It ” rror re isplayed IS ”which s isplayed ithout nput f ser s he rror f cing ensor Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 62 Detected by low side Low side cycle refrigerant leak, bad comp, Refer to 8-24 leakage long time door open, etc. Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 63 $IWHU VHDOHG V\VWHP UHSDLU ZKHQ IUHH]HU WHPSHUDWXUH LV ƒ) WKH HUURU FRGH ZLOO GHVDSSHDU DXWRPDWLFDOO\ &KHFN WKH OHDN XVLQJ 89 GULHU IRU QH[W YLVLW Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 64 3. The open door alarm and the LED auto-off feature will work normally and can be demonstrated. 4. To reset o ormal peration ress nd old Refrigerator Temp button and Ice Plus button or 5 econds Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 65 406B 404A 319B 332C 409B 329A 412D 106A 405F 158F 405C 419B 312A 903E 329C 305B 323B 420A 315A 305C 319A 319C 305B 305C Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 68 241C 244A 244A 212J 212J 243D 243C 243A 262F 243P 243B 621G 250A 250B 249E 201A 250B 212J 406B 621B 212A 203A 249F 621C Copyright © 2019 - 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
Page 70 MFL71780021 Jun.2020...

LG LRFCS25D3 Series Service Manual

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