LG LFXS26973 Series Service Manual
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LG LFXS26973 Series Service Manual

LG LFXS26973 Series Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL :
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.
Copyright © 2016-2017 LG Electronics Inc. All rights reserved. Only training and service purposes
LFXS26973*
CONFIDENTIAL

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Summary of Contents for LG LFXS26973 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 © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes. - 2 -...

  • Page 3: Specifications

    1. SPECIFICATIONS LFXS26973* cu.ft. ● ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Clear Drawer Type DIMENSIONS (inches) 3 /4 34 7/8 X 69 3 /4 (WXDXH) 26.2 cu.ft. COMPRESSOR Linear NET WEIGHT (pounds) EVAPORATOR Fin Tube Type 128kg(282lb) COOLING SYSTEM Fan Cooling...
  • Page 4 LED interior lamps Dairy Bin Crisper Glide‘N’Serve Fixed Door Bin Auto-Closing Hinge (On Some Models) Pullout Drawer In-Door Ice Bin Durabase and Durabase Divider ® ® - 4 -...

  • Page 5: Disassembly

    3. DISASSEMBLY 3-1 Removing Refrigerator Door CAUTION : Before you begin, unplug the refrigerator. Remove food and bins from doors. Left Door -FIG. 2 1. Disconnect water supply tube by pushing back on the disconnect ring (4).-FIG. 1 2. Open door. Loosen top hinge cover screw (1). Use flat tip screwdriver to pry back hooks on front underside of cover (2).

  • Page 6: Door

    3-2 DOOR Door Gasket Replacement ● 1. Insert gasket into channel Mullion Removal ● Press gasket into channels on the four remaining 1. Remove 2 screws. sides of door. Figure 5 Figure 1 2. Lift Mullion up carefully. ● Mullion Replacement 1.

  • Page 8: Door Alignment

    3-4 Door Alignment * Ice Fan Scroll Assembly Replacement If the space between the door are uneven, 1) Remove the plastic guide on the left side, using a follow the instructions to align them. phillips screwdriver to remove the screws. Remove the Base Grillie.

  • Page 9: Multi Duct

    3-7-2 Cap Decor LED LAMP(Bottom) LAMP Unplug, or disconnect power at the circuit breaker. 1. Unplug refrigerator power cord from electric outlet. If necessary, remove top shelf or shelves. 2. Open the refrigerator door to need diassembly. 3. Put flat screwdriver into service hole, remove the cover 3-7-1 Refrigerator Compartment Lamp of cap decor LED LAMP.

  • Page 10: Main Pwb

    3-9 DISPLAY PCB 3-8 MAIN PWB 1) Loosen 3 screws on the PWB cover. Figure 20 2) Remove the PWB cover Figure 21 3) Disconnect wire harness and replace the main PWB in the reverse order of removal. Figure 22 - 1 0 -...

  • Page 11: Ice Corner Door Replacement

    3) Disconnect wire harness from wall of compartment. 3-10 ICE CORNER DOOR REPLACEMENT 1) Loosen the front screw as shown in the picture. 2) Lift up the hinge with one hand. 3) Pull out the Ice Corner Door with the other hand. hinge Motor DC Assem Figure 35...

  • Page 12: Cap Duct Motor Replacement

    4) Insert 2 screws. CAUTION: Make sure that the motor housing is taped to the mold, if not positioned correctly the cover will not fit properly. Figure 42 5) Push housing aside. Figure 36 3-12 CAP DUCT MOTOR REPLACEMENT Figure 43 1) Separate the Housing of the Cap Duct Motor.

  • Page 13: How To Remove A Ice Bin

    3-17 HOW TO REMOVE A ICE BIN 3-18 HOW TO INSERT A ICE BIN 1) Grip the handles, as shown. 1) Insert the Ice Bin, slightly tilting to avoid touching the Icemaker. (Especially, Ice-Detecting Sensor) Figure 44 Figure 47 2) Tilt and lift slightly as shown. Figure 45 3) Remove ice bin slowly.

  • Page 14: How To Remove And Reinstall The Pullout Drawer

    3-19 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-19-1 Follow Steps to Remove Step 1) Open the freezer door. Step 2) Remove the lower basket. Step 3) Remove the two screws from the guide rails (one Step 4) Removal of the freezer door is done by lifting clear from each side).
  • Page 15 3-19-2 Follow Steps to Reinstall Step 1) Insert both side of supporter cover tv into Step 2) ① Assemble a bar and gear ice with screw. ② Push the otherside of the gear to inside of the connector rails, and then screw them. bar.
  • Page 16 3-22 3-21 WATER VALVE DISASSEMBLY METHOD 1) Turn off the water to unit. Remove the waterline from the valve. Figure 60 2) Remove cover and 1 screw from the valve. Mechanical Cover Figure 61 3) Separate the housing and remove the valve. Housing Figure 62 4) Remove the clip, and press the collet to separate the...

  • Page 17: Drawer Removal

    3-23 Drawer Removal Fully extend the drawer and lift from the front pulling straight out. Figure 66 To install the drawer back into the frame, tilt the front sightly and pushingt back into place. Figure 67 - 17 -...
  • Page 18 Chapter 13 How to disassemble and assemble the vegetable box 1. Cover TV service method (GC-J288***) How to disassemble and Take out the vegetable chamber shelf by assemble the vegetable box laying it down 45°. How to disassemble vegetable box While the refrigeration chamber doors are open wide, remove all of the Magic Space cover and shelves.

  • Page 19: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 Compressor protection logic Since linear Comp conducts linear reciprocating motion, ● 4-1-1 Role we have protection logic for compressor, motor and PCB The compressor intakes low temperature and low pressure as the below. gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas.

  • Page 20: Circuit Diagram

    5. CIRCUIT DIAGRAM MEZ66414024 (Label,Circuit) MEZ66414024 WH/RD GY/RD LIVE /TENSION FUSE/ FUSIBLE PILOT VALVE/ ROBINET PILOTE GY/WH BO/BL PILLAR HTR/ PILIER DE CHAUFFAGE RD/YL BN/WH YL/WH GN/YL YL/BK FU LED F-ROOM ICE VALVE SB/WH LAMP CON2 15-16 10 11 12 H/BAR HTR H/BAR CHAUFFAGE BL/RD...

  • Page 21: Troubleshooting

    6. TROUBLESHOOTING 6-1 Error Code Summary WARNING: When checking Resistance values, make sure to turn off the power, and wait for the voltage to discharge. NOTE) Within 3 hours after the error : Press the Ice Plus button and Freezer button simultaneously 3 hours after the error : All errors, except for “rt E”, “HS E”, “IS E”...

  • Page 22: Pcb Picture

    7. PCB Picture 7-1. Main PCB ( P/N : EBR860937 **) CON71 CON6 CON7 CON1 CON5 CON201 CON61 CON3 CON4 7-2. Display PCB ( P/N : EBR841464**) CON103 CON102 CON101 CON802 - 22 -...
  • Page 23 7. PCB Picture 7-3. Sub PCB ( P/N : EBR764684**) Con1 Con2 7-4. Sub PCB ( P/N : EBR640311**) CON5 CON2 CON4 CON1 - 23 -...
  • Page 24 8. Trouble Shooting 8-1. Freezer Sensor Error (FS E) Symptom Check Point 1. FS E 1. Check for a loose connection 2. Check Sensor Resistance CON71 CON6 CON7 CON1 CON5 CON201 CON61 CON3 CON4 Resistance [ Short CON5 Open pin ~ 11 Other Normal CON5...
  • Page 25 Freezer Sensor Error (FS E) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON5 CON5 Resistance [ pin ~ 11...
  • Page 26 8-2. Refrigerator Sensor Error (rS E) Symptom Check Point 1. rS E 1. Check for a loose connection 2. Check Sensor Resistance CON71 CON7 CON6 CON1 CON5 CON201 CON61 CON3 CON4 Resistance [ Short CON5 Open pin ~ 17 Other Normal CON5 Resistance [...
  • Page 27 Refrigerator Sensor Error (rS E) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON5 CON5 Resistance [ pin ~ 17...
  • Page 28 8-3. Icing Sensor Error (IS E) Symptom Check Point 1. IS E 1. Check for a loose connection 2. Check Sensor Resistance Resistance [ CON101 Short pin ~ 2 Open Other Normal CON101 Resistance [ pin ~ 2 -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC -13ºF / -25ºC...
  • Page 29 Icing Sensor Error (IS E) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? Check the Temperature and resistance refer to the table. No problem? CON101 Resistance [ pin ~ 2 -22ºF / -30ºC...
  • Page 30 8-4. Defrost Sensor Error (dS F) Symptom Check Point 1. dS F 1. Check for a loose connection 2. Check Sensor Resistance CON71 CON7 CON6 CON1 CON5 CON201 CON61 CON3 CON4 Resistance [ Short CON5 Open pin ~ 9 Other Normal CON5 Resistance [...
  • Page 31 Defrost Sensor Error (dS F) 4 Check the Temperature and Change resistance refer to the table. Main No problem? Reconnect or Is the Connector disconnected repair the or loose between Main PCB, connector Defrost controller and Sensor? CON5 Resistance [ pin ~ 9 23ºF / -5ºC 32ºF / 0ºC...
  • Page 32 8-5. Ice Maker Motor Error (It E) Symptom Check Point 1. It E 1. Check the Ice maker rotation 2. Check the motor voltage CON 2 CON 5 (1) Pin1, (2) Pin5, (3) Pin8 CON 5 CON 4 CON 1 CON 5 - 32 -...
  • Page 33 Ice Maker Motor Error (It E) Change the Explain to Main PCB Input Ice Maker test mode(Push customer Check the ice maker forward status The ice maker test button),check The voltage (1)~(2) point 0V? The Ice Tray,Ice maker motor CON 5 Rotate? (1) Pin1, (2) Pin5, (3) Pin8...
  • Page 34 8-6. Defrost Heater Error (dH F) Symptom Check Point 1. dH F 1. Check the door gasket 2. Check the Defrost control part 3. Check the PCB output voltage CON71 CON7 CON6 CON1 CON5 CON 7 CON5 CON201 CON61 CON3 CON4 Part Resistance [...
  • Page 35 Defrost Heater Error (dH F) Input Test 3 Mode (Push the button 3 times) Replace the Replace Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112V ~ 116V? Change TEST MODE 3 Voltage [V] Defrost...
  • Page 36 8-7. Freezer Fan Error (FF E) Symptom Check Point 1. FF E 1. Check the air flow 2. Check the Fan Motor 3. Check the PCB Fan motor voltage CON71 CON7 CON6 CON1 CON5 CON 3 CON201 CON61 CON3 CON4 TEST MODE 1 Voltage [V] CON7...
  • Page 37 Freezer Fan Error (FF E) Reset the unit and Check the Fan Motor voltage Input Test1 Mode. Replace Is Fan Motor voltage 12V? (Push the button 1 time) Main PCB CON3 TEST MODE 1 Voltage [V] CON7 Go to 3 pin ~ 5 Open the freezer door and Check the air flow.
  • Page 38 8-8. Icing Fan Error (IF E) Symptom Check Point 1. IF E 1. Check the air flow 2. Check the Connector 3. Check the PCB Fan motor voltage CON71 CON7 CON6 CON1 CON5 CON 3 CON201 CON61 CON3 CON4 TEST MODE 1 Voltage [V] CON3 pin ~ 9...
  • Page 39 Freezer Fan Error (IF E) Reset the unit and Check the Fan Motor voltage Input Test1 Mode. Replace Is Fan Motor voltage 12V? (Push the button 1 time) Main PCB CON3 TEST MODE 1 Voltage [V] CON3 Go to 3 pin ~ 9 Open the freezer door and Check the air flow.
  • Page 40 8-9. Condenser Fan Error (CF E) Symptom Check Point 1. CF E 1. Check the air flow 2. Check the Connector 3. Check the PCB Fan motor voltage CON71 CON7 CON6 CON1 CON5 CON 3 Fan Motor CON201 CON61 CON3 CON4 TEST MODE 1 Voltage [V]...
  • Page 41 Condenser Fan Error (CF E) Reset the unit and Check the Fan Motor voltage Input Test1 Mode. Replace Is Fan Motor voltage 12V? (Push the button 1 time) Main PCB CON 3 TEST MODE 1 Voltage [V] CON3 Go to 3 pin ~ 1 Check the fan rotating.
  • Page 42 8-10. Communication Error (CO E) Symptom Check Point 1. CO E 1. Check the loose connection 2. Check the Hinge connection CON71 CON6 CON7 CON1 CON5 CON 6 Display CON101 CON201 CON61 CON3 CON4 CON101 Voltage [V] CON101 pin ~ 6 CON101 Not 0V, 5V pin ~ 6...
  • Page 43 Communication Error (CO E) Change the Main PCB Check the voltage. Is CON101 4 pin ~ 6 voltage 0V or 5V? Check the loose connection Voltage Housing CON101 Check the pin ~ 6 0V, 5V Check the voltage. Hinge (loose connection) Are CON101 7 pin ~ 6...
  • Page 44 8-11. Cube mode doesn’t work Symptom Check Point 1. Cube mode 1. Check the loose connection doesn’t work 2. Check the resistance CON1 CON2 Ice Maker Geared Motor Dispenser Motor - 44 -...
  • Page 45 8-11. Cube mode doesn’t work Resistance [ Voltage [V] CON1 CON1 24V±10% pin, 19 pin, 6 2.55±7% pin, 21 pin, 21 Pushing Voltage [V] The LEVER S/W CON1 pin, 6 5V±10% pin, 6 - 45 -...
  • Page 46 Cube mode doesn't work Change the Cover Check the Display PCB Voltage Assembly, Value Check the Check the Auger Motor Display Ice Bucket (Working Sound (Loc. 279A) Con 102 Visual inspection) Check the SUB PCB Change the Resistance Value Dispenser Assembly,Ice CON102 (Loc.
  • Page 47 8-12. Crush mode doesn’t work Symptom Check Point 1. Crush mode 1. Check the loose connection doesn’t work 2. Check the resistance CON1 CON2 Ice Maker Geared Motor Dispenser Motor - 47 -...
  • Page 48 8-12. Crush mode doesn’t work Resistance [ Voltage [V] CON1 CON1 24V±10% pin, 19 pin, 6 2.55±7% pin, 21 pin, 21 Pushing Voltage [V] The LEVER S/W CON1 pin, 6 5V±10% pin, 6 - 48 -...
  • Page 49 Crush mode doesn't work Change the Cover Check the Display PCB Voltage Assembly, Value Check the Check the Auger Motor Display Ice Bucket (Working Sound (Loc. 279A) Con 102 Visual inspection) Check the SUB PCB Change the Resistance Value Dispenser Assembly,Ice CON102 (Loc.
  • Page 50 8-13. Water mode doesn’t work Symptom Check Point 1. Water mode 1. Check the loose connection doesn’t work 2. Check the resistance valve CON2 LEVER S/W Voltage [V] Pushing 112~115V CON2 pin ~ Neutral 0~2V Pushing Resistance [ 360~420 Pilot Valve Water valve 360~420 - 50 -...
  • Page 51 Water mode doesn't work Replace Check the loose connection Water Valve Check the resistance value. Is Water Valve resistance 360~420 ? Change the Check the voltage. (while pushing the lever S/W) Is voltage correct? Water Valve Resistance [ Water valve 360~420 LEVER S/W Voltage [V]...
  • Page 52 8-14. Refrigerator room lamp doesn’t work Symptom Check Point 1. Refrigerator room 1. Check the Refrigerator door switch sticky lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp Door S/W S/W Resistance [ Open Infinity Door Close Voltage [V]...
  • Page 53 Refrigerator room lamp doesn’t work Change the Check the LED Lamp voltage. Change the Check the Refrigerator door switch. Door S/W Is it 0~2V? (While door closed) Door S/W Does it feel sticky? Change the Check the door S/W resistance. Door S/W 5 Check the LED Lamp voltage.
  • Page 54 8-15. Freezer room upper lamp doesn’t work Symptom Check Point 1. Freezer room upper 1. Check the Freezer door switch sticky lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp F U LED PCB Door S/W S/W Resistance [ Open Infinity...
  • Page 55 Freezer room upper lamp doesn’t work Change the Change the Check the Freezer door switch. Door S/W LED Lamp Check the LED Lamp voltage Does it feel sticky? Is voltage 12V? (While door open) Change the Check the door S/W resistance. Door S/W Is it correct compared with table? Explain to customer...
  • Page 56 8-16. Poor cooling in Fresh food section Symptom Check Point 1. Poor cooling in Fresh 1. Check the sensor resistance food section 2. Check the air flow 3. Check the air Temperature 4. Check the R-Damper motor voltage Duct Fan Motor Resistance [ CON5 18 pin ~ 17...
  • Page 57 Poor cooling in Fresh food section Check the air temperature. Check the Is it cold? Compressor and sealed system Check the sensor resistance. Go to 7 Check the Fan Motor voltage Replace Is Fan Motor voltage right? CON5 Main PCB Resistance [ pin ~ 17 23ºF / -5ºC...
  • Page 58 8-17. Poor cooling in Freezer compartment Symptom Check Point 1. Poor cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air flow 3. Check the air Temperature 4.Check the Fan motor sticky 5. Check the Fan motor voltage Duct Fan Motor CON5 12...
  • Page 59 Poor cooling in Freezer compartment Check the Compressor Check the air temperature. and sealed Is it cold? Check the sensor resistance. system Change the CON7 Resistance [ Fan motor Check the Fan motor. pin ~ 20 Rotate fan using hand. -22ºF / -30ºC It feel sticky? -13ºF / -25ºC...
  • Page 60 Replace Check the Fan Motor voltage Main PCB Is Fan Motor voltage right ? TEST MODE 1 Voltage [V] CON3 8 pin ~ 5 0V<Voltage<5V CON5 7 pin ~ 5 7 Check the Fan Motor voltage Change the Is Fan Feed Back voltage right? motor TEST MODE 1 Voltage [V]...
  • Page 61 8-17. Over cooling in Freezer compartment Symptom Check Point 1. Over cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air flow 3. Check the air Temperature 4.Check the Fan motor sticky 5. Check the Fan motor voltage Duct Fan Motor Resistance [...
  • Page 62 Over cooling in Freezer compartment Change the Fan motor Check the Fan motor. Rotate fan using hand. Check the sensor resistance. It feel sticky? Fan Motor CON5 Resistance [ pin ~ 11 -22ºF / -30ºC -13ºF / -25ºC -4ºF / -20ºC Change the Main PCB -13ºF / -25ºC 14ºF / -10ºC...
  • Page 63 8-18. Home Bar Heater do not work Symptom Check Point 1. Home Bar do not work 1. Check the Main PCB 2. Check the Home Bar Heater Part Resistance [ Defrost Heater 1912~2314 TEST MODE 3 Voltage [V] CON7 112V ~ 116V pin ~ 3 TEST MODE 1 Voltage [V]...
  • Page 64 Home Bar Heater do not work Input Test 3 Mode (Push the button 3 times) Replace the Replace Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112~116V? Connect the TEST MODE 3 Voltage [V] housing...
  • Page 65 8-19. GID Heater do not work Symptom Check Point 1. GID HTR do not work 1. Check the Main PCB 2. Check the Home Bar Heater Part Resistance [ Defrost Heater 1912~2314 TEST MODE 3 Voltage [V] CON7 112V ~ 116V pin ~ 3 TEST MODE 1 Voltage [V]...
  • Page 66 GID Heater do not work Input Test 3 Mode (Push the button 3 times) Replace the Replace Check the Door gasket . Check the Heater Voltage. Door gasket Main PCB Is door gasket damaged? Is voltage 112~116V? Connect the TEST MODE 3 Voltage [V] housing Is the connector loose?
  • Page 67 8-20. Hygiene fan doesn’t work Symptom Check Point 1. Hygiene fan doesn’t 1. Check Hygiene Fan motor voltage work 2. Main PCB Hygiene Fan motor Voltage [V] CON5 pin ~ 1 - 67 -...
  • Page 68 Hygiene fan doesn’t work Change the Change the Fan motor Check the Hygiene voltage Choose the Hygiene Max in display Is voltage 12V? (While door open) Check the PCB Voltage. Is CON6 2 pin ~ 5 voltage 12V? Voltage [V] CON5 pin ~ 1 Explain to customer...
  • Page 69 8-20. Wi-Fi modem doesn’t work Symptom Check Point 1. Wi-Fi modem 1. Check connector doesn’t work 2. Display PCB 3. Wi-Fi modem PCB Display PCB Wi-Fi PCB CON802 CON802 Wi-Fi ON Voltage [V] CON802 pin ~ 4 CON802 pin ~ 4 0V, 5V CON802 0V, 5V...
  • Page 70 Wi-Fi modem doesn’t work Check the Display PCB output? Connect the Change the ( While Wi-Fi function is on ) housing display Choose the connectors in the display and lead wire. Is it loose ? Display Voltage CON802 pin ~ 4 pin ~ 4 0V, 5V CON802...

  • Page 71: Reference

    10. REFERENCE 10-1 TEST MODE and Removing TPA 1. How to enter the TEST MODE Push the test button on the Main PCB to enter the TEST MODE. * 1 time : Comp / Damper / All FAN on (Everything is displayed) * 2 times : Damper closed (22 22 displayed) * 3 times : Forced defrost mode...
  • Page 72 10-2 TEMPERATRUE CHART - FRZ AND ICING SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 4.09 V 73.29 -30°F (-35°C) 3.84 V 53.63 -21°F (-30°C) 3.55 V 39.66 -13°F (-25°C) 3.23 V 29.62 -4°F (-20°C) 2.89 V 22.33 5°F (-15°C) 16.99 2.56 V 14°F (-10°C) 2.23 V 13.05...
  • Page 73 10-3 TEMPERATRUE CHART - REF AND DEF SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 4.48 V 225.1 -30°F (-35°C) 4.33 V 169.8 -21°F (-30°C) 4.16 V 129.3 -13°F (-25°C) 3.95 V 99.30 -4°F (-20°C) 3.734 V 76.96 5°F (-15°C) 60.13 3.487 V 14°F (-10°C) 3.22 V 47.34...
  • Page 74 10-4 How to check the Fan-Error (1) EBR650027** After sending a signal to the fan, the MICOM checks the BLDC fan motor s lock status. If there is no feedback signal from the BLDC fan, the fan motor stops for 10 seconds and then is powered again for 15 seconds.
  • Page 75 11. COMPONENT TESTING INFORMATION 11-1 Defrost Controller Assembly Function The controller assembly is made up of two different kinds of parts. The fuse and the sensor. To determine if these parts are defective, check for resistance. The fuse will cut power to the defrost heater at very high temperatures.
  • Page 76 11-2 Sheath Heater Function Sheath heater is a part for defrost. All heating wire is connected to only one line. To check if the part is defective, check the resistance. How to Measure (1) (2) Set a ohmmeter connect to The 2 housing pin. Measure the 2 pin connected to Sheath Heater.
  • Page 77 11-3 Door Heater Assembly 1.9-2.2KΩ - 77 -...
  • Page 78 11-5 Dispenser DC Motor Function - Dispenser DC Motor : When customer push the dispenser button, Pull duct door and abstract from ice bank. How to Measure Dispensor DC Motor Standard Dispenser DC Motor Test Points Result (1) to (2) 9.9 ~ 12.1 - 78 -...
  • Page 79 11-7 Damper Function The damper supplies cold air from the freezer to the chill room using the damper plate. The chill room is colder when the damper plate is open. When the damper is closed the chill rooms temperature will rise. How to Measure <...
  • Page 80 11-9 Flow Sensor Function Flow Sensor (in machine room) 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 k - 80 -...
  • Page 81 Troubleshooting - COMP Operation Error LED Check ① ② ③ 1. Open the PCBA Cover 2. Check the number of LED blinks 3. When the COMP is normal, (Refer to the next page for resolution it will not blink by number of LED blinks) When the COMP &...
  • Page 82 Troubleshooting Troubleshooting Trip Information Current/Voltage Sensing - Simple Check Flow Chart Error Test Mode LED 8 Blinks LED 8 Blinks Replace PCB About 5min Reset 1 Input Over Stroke Comp Connection Error Test Mode LED 7 Blinks LED 7 Blinks Replace PCB Reset About 5min...
  • Page 83 What to do per LED Blinking and Trip protection Logic 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. Test Mode LED 1 Blinks LED 1 Blinks...
  • Page 84 What to do per LED Blinking and Trip protection Logic 2. Stroke Trip and LED Blinking 2 times (Stroke Trip) Blink Blink OFF Blink Blink → Purpose : Protection piston crash by abnormally large stroke. → Case 1. Do not operate COMP : Harness connection failure between the PCB, COMP, Capacitor. →...
  • Page 85 What to do per LED Blinking and Trip protection Logic 3. No Connection Trip And LED Blinking 3 times (No Connection Trip) Blink Blink Blink Blink Blink Blink  Purpose : Prevention Over-Voltage and Over-Current by detecting connection error check. ...
  • Page 86 What to do per LED Blinking and Trip protection Logic 4. Over Voltage Trip and LED Blinking 4 times (Over Voltage Trip) Blink Blink Blink Blink Blink Blink Blink Blink  Purpose : Protection the PCB by Over Voltage.  Cause : DC Link Over Voltage Input(over 450V ...
  • Page 87 What to do per LED Blinking and Trip protection Logic 5. Lock Piston Trip and LED Blinking 5 times (Locked Piston) Blink BlinkBlinkBlinkBlink  Purpose : Detect locked piston.  Cause : Oil shortage of the cylinder, Cylinder or Piston damage, clogging the discharge, Comp. internal debris. ...
  • Page 88 What to do per LED Blinking and Trip protection Logic 6. Current Trip and LED Blinking 6 times (Current Trip) Blink Blink Blink Blink Blink Blink  Purpose : Protection Over-Current(Over-Load)  Cause : Abnormally ambient temperature(Over 43℃), Abnormally conditions like Shield machine room etc. Condenser Fan failure, Comp.
  • Page 89 What to do per LED Blinking and Trip protection Logic 7. IPM Fault Trip and LED Blinking 7 times (IPM Fault) Blink Blink BlinkBlink BlinkBlinkBlink  Purpose : Protection Over-Current by failure IPM(IPM short)  Cause : IPM Short and failure ...
  • Page 90 What to do per LED Blinking and Trip protection Logic 8. Comp TX Error Trip and LED Blinking 8 times (Communication Error) Blink Blink Blink BlinkBlink BlinkBlinkBlink  Purpose : Detection communication error with the Micom of the refrigerator control. ...
  • Page 91 Check the PCB Output -. Check output voltage from PCB IPM Output check Multi Tester Multi Tester Common Power A-Inverter  To judge whether there is any issue with the PCB operation, check the PCB output voltage. Normal: Voltage 80[V] or higher output at COMMON - POWER - 91 -...
  • Page 92 Check the Compressor & Harness 1. Check the Harness connection  Step 1. Power off. 2. Check the Compressor 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) Power Check the Resistance Harness Connection...
  • Page 93 Check the Compressor & Harness  Comp Terminal resistance measurement (Power & Common)  Check the broken-down insulation : Comp. Save - Earth resistance measurement Multi Multi Tester Tester Po: Power Co: Common N/C: Open terminal Resistance FLA150NBMA 7.2~9.2 Ω ※The resistance can differ by few Ω...
  • Page 94 12-5 SERVICE DIAGNOSIS CHART COMPLAINT • Is the power cord unplugged from the outlet? • Plug into the outlet. No Cooling. • Check if the power switch is set to OFF. • Set the switch to ON. • Check if the fuse of the power switch is shorted. •...
  • Page 95 12-6 REFRIGERATION CYCLE Troubleshooting Chart ▼ TEMPERATURE STATE OF STATE OF THE OF THE CAUSE REMARKS THE UNIT EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher than • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard ambient to a leak.
  • Page 96 12-6-2 SEALED SYSTEM DIAGNOSIS “Not Cooling” Complaint All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area Frost Partial None Pattern? Equalization Equalization Test Test Very Fast Very Slow Very Slow Very Fast Fast...
  • Page 97 13. ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING 13-1 Icemaker’s Basic Operating Method Power On Power On Start Position • Adjusts Ice Tray to Start Position with power on. • Adjusts Ice Tray to Start Position with power on. • Waits until water becomes ice. Icemaking ※For cold air circulation, Ice tray will be Mode...
  • Page 98 13-2 ICE MAKER FUNCTIONS 13-2-1 Icemaking Mode 1. Icemaking Mode begins right after the ice tray fills with water. 2. Icemaker waits until water becomes ice in the ice tray. ※ Ice-detecting sensor checks if the ice bin is full every 2min. 13-2-2 Harvest Mode At least in 110min, since icemaker begun icemaking mode, Icemaker starts to twist the ice tray to drop ices into the Ice bin.
  • Page 99 13-3-2 Icemaker not making ice or not making enough ice (Icemaker Unit & Ice-detecting sensor Diagnosis) Icemaker Unit and Ice-detecting sensor Diagnosis The icemaker unit and Ice-detecting sensor is programmed to be diagnosed. Follow the procedure step by step to check to see if icemaker and Ice-detecting sensor is working normally. Icemaker Unit Ice-detecting sensor Fill Key...
  • Page 100 STEP (Ice-detecting sensor Diagnosis) 2. Close the left door 1. Remove Ice bin from compartment 3. Wait for 3min. (Door switch pushed) 4. Freezer door stays open 5. Push the refrigerator button & lock button at the same time. If “ETY” is shown on the display after the procedure above, Ice-detecting sensor is normal. If “FULL”...

  • Page 101: Description Of Function & Circuit Of Micom

    14. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 14-1 FUNCTION 14-1-1 Function 1. When the appliance is plugged in, it is set to 37°F for Refrigerator and 0°F for freezer. You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button. 2.
  • Page 102 14-1-4 Filter condition display function 14-1-5 Ice Plus selection 1. Please select ice plus function for quick freezing. 2. When you press the ice plus button, the ice plus icon will be turned on again. 3. Ice plus function automatically turns off after a fixed time passes. 4.
  • Page 103 14-1-7. How to operate the Hygiene fresh filter Auto Mode Hygiene Fresh POWER Mode After 4 hours 14-1-8. AUTO Mode 1. Fan installed on the multi.duct on the rear side of the filter operates. 2. Fan is repeatedly turned on for 10 minutes and then off for 60 minutes. 3.
  • Page 104 14-1-10 CONTROL OF FREEZER FAN MOTOR 1. Freezer fan motor has high and standard speeds. 2. High speed is used at power-up, for Ultra Ice, and when refrigerator is overloaded. Standard speeds is used for general purposes. 3. To improve cooling speed, the RPM of the freezer fan motor change from normal speed to high. 4.
  • Page 105 14-1-15 Defrosting (removing frost) 1. Defrosting starts each time the COMPRESSOR running time Betwee 7~50 hours. 2. For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours. 3. Defrosting stops if the sensor temperature reaches 46.4°F(8°C) or more. If the sensor doesn’t reach 46.4°F(8°C) in 1 hours, the defrost mode is malfunctioning.
  • Page 106 EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION: Use the part number to order part, not the position nu mber. 626A 503E 207B 624G 402A 624C 610F 624A 271B 103B 103A 501F 207A 402A 145B 150D 406D 271D 500A 411A 313A 262B...
  • Page 107 FREEZER PARTS CAUTION: Use the part number to order part, not the position nu mber. 133B 145C 131A 136C 136B 133A 132P 145F 237C 136A...
  • Page 108 REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position nu mber. 139A 141A 141A 139A 161C 141D 151A 146B 146C 151B 162B 145D 162A...
  • Page 109 DOOR PARTS CAUTION: Use the part number to order part, not the position number. 500C 231B 233B 235A 241D 233A 231A 241K 212G 241K 241D 241G 241K 241D 312B 243D 244A 262C 243A 243E 244A 619B 243C 262E 409B 262C 158C 243B 102A...
  • Page 110 DISPENSER PARTS CAUTION: Use the part number to order part, not the position nu mber. 279A 279J 402C 104A 275A 406A 279H 612B 612C...
  • Page 111 VALVE & WATER TUBE PARTS 616H 617A 625A 623B 616J 625A 627B 616E 616J 603C 623A 627A 619A...
  • Page 112 ICE MAKER & ICE BIN PARTS CAUTION: Use the part number to order part, not the position number. 600C 600A 630J 630J 630F 630F 630B 630C 611A 630H 630D 630E 630Q 630G Freezer Room 600F 600B...
  • Page 113 Apr.2018 Printed in China...

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