LG LMX28994 Series Service Manual
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LG LMX28994 Series Service Manual

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See also: Owner's Manual
REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LMX28994**
COLOR : STAINLESS(ST)

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Summary of Contents for LG LMX28994 Series

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL : LMX28994** COLOR : STAINLESS(ST)

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 1. SPECIFICATIONS ................................3 2. PARTS IDENTIFICATION ..............................4 3. DISASSEMBLY ................................5-21 REMOVING AND REPLACING REFRIGERATOR DOORS ..................... 5 DOOR ....................................6 DOOR ALIGNMENT ................................7 GRILLE ASSEMBLY ................................7 FAN AND FAN MOTOR ..............................7 DEFROST CONTROL ASSEMBLY ...........................

  • Page 3: Specifications

    1. SPECIFICATIONS 1-1 LMX28994** 28 cu.ft. ● ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Clear Drawer Type DIMENSIONS (inches) 3 /4 X 35 3 /8 X 69 3 /4 (WXDXH) 27cu.ft. COMPRESSOR Linear NET WEIGHT (pounds) 175 kg. (386 lb) EVAPORATOR Fin Tube Type COOLING SYSTEM...

  • Page 4: Parts Identification

    2. PARTS IDENTIFICATION " " ADJUSTABLE REFRIGERATOR SHELVING The refrigerator compartment shelves are adjustable to allow flexibility for storage needs. GALLON STORAGE BINS Two interchangeable bins can be arranged to suit your storage needs. REMOVABLE ICE STORAGE BIN The ice storage bin can be removed to fill ice buckets, coolers, or pitchers.

  • Page 5: Disassembly

    3. DISASSEMBLY 3-1 REMOVING AND REPLACING REFRIGERATOR DOORS 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 (3).-FIG. 1 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. 2. Lift Mullion up carefully. ● Mullion Replacement 1. Connect wire harness. 3.

  • Page 7: Door Alignment

    3-3 Door Alignment If the space between the door are uneven, follow the instructions to align them. Remove the Base Grillie. Turn the leveling legs counter clock wise to raise or clock wise to lower the height of the front of the refrigerator by using flat blade screw driver or 11/32"...

  • Page 8: Defrost Control Assembly

    3-6 DEFROST CONTROL ASSEMBLY 5) To remove the LED assembly, pull apart the cover. Defrost Control assembly consists of Defrost Sensor and FUSE-M. Case, lamp The Defrost Sensor works to defrost automatically. It is attached to the metal side of the Evaporator and senses its temperature.

  • Page 9: Main Pwb

    3-9 MAIN PWB 1) Loosen 3 screws on the PWB cover. 5) Remove the 4) Holding the inner side of lead wire. the dispenser pull forward to remove. CAUTION: When replacing the dispenser cover make sure the lead wire does NOT come off and the water line 2) Remove the PWB cover is not pinched by the dispenser.

  • Page 10: Water Button Assmebly

    3-12 WATER BUTTON ASSMEBLY 3-14 ICEMAKER REPLACEMENT 1) Remove screws. 1) Remove 4 screws as shown. 2) Grasp the Button assembly and lift. Button Lever 2) Grasp the bottom of motor cover assembly and pull slowly. 3-13 ICE CORNER DOOR REPLACEMENT 1) Loosen the front screw as shown in the picture.

  • Page 11: Sub Pwb For Working Dispenser

    CAUTION: Make sure that the motor housing is taped to 3-16 CAP DUCT MOTOR REPLACEMENT the mold, if not positioned correctly the cover will not fit 1) Separate the Housing of the Cap Duct Motor. properly. 2) Unscrew 3 screws to disassemble the motor. 3) When replacing the motor, check the position of the door 3-15 SUB PWB FOR WORKING DISPENSER duct and the link for proper fit.

  • Page 12: 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) 2) Tilt and lift slightly as shown. 3) Remove ice bin slowly.

  • Page 13: How To Replace The Converta Display

    3-19 HOW TO REPLACE THE CONVERTA DISPLAY 3-19-1 Disassembly 3-19-2 Assembly 1) Attach tape PETP on the door. 1) Connect lead wire from display (Lower part of display. To protect Scratch) 2) Pre-Assemble display’s top portion department 2) Disassemble display’s lower portion to using tool. 3) Assembly display;s side portion department 3) Disconnect lead wire from display.

  • Page 14: How To Replace The Converta Joint

    3-20 HOW TO REPLACE THE CONVERTA JOINT 1) Open the Converta drawer. 7) Using any sharp things such as drill, take out the gear in pressing the right rail clip. 2) Remove the drawer. 3) Remove the motor cover. Clip 4) Remove the Auto Drawer Joint Housing 8) Pull out rail to disassemble in pressing the rail stopper.
  • Page 15 9) Take it out after disassembling the Holder rail screws 12) Take off the Holder rail fix connector. (3 pcs). 10) Take it out by pressing the hook of auto drawer joint housing by hands. 13) Pull out the support holder to the rear hole. - Pull out the stopper part strongly.

  • Page 16: How To Replace The Auto Drawer Motor

    3-21 HOW TO REPLACE THE AUTO DRAWER MOTOR 6) Remove the Auto Drawer Joint Housing, then separate holder lever. 1) Open the door of F room. 2) Remove the Drawer. 3) Remove screws of Guide rail.(Each one in the both side) 7) Using any sharp things such as drill, take out the gear in pressing the right rail clip.

  • Page 17: How To Replace The Auto Drawer Joint

    8) Take out the gear in the bar, and then bar in the motor. 3-22 HOW TO REPLACE THE AUTO DRAWER JOINT 1) Remove the Converta drawer(See p.) 2) Remove the center plate and barrier.(See p.) 3) Open the F door. 4) Remove the drawer.
  • Page 18 8) Remove the auto drawer joint housing, then separate 10) Pull out rail to disassemble in pressing the rail stopper. holder lever. 11) Remove the guide rail screws (each guide rail has 5 screws.) 9) Using any sharp things such as drill, take out the gear in pressing the right rail clip.
  • Page 19 13) Pull out the Holder rail inner link by hands. 15) Pull out the support holder to the rear hole. - Pull out the stopper part strongly. Supporter Holder Hole 14) Take off the Holder rail fix connector. Stopper 16) Pull out the auto drawer joint to the outside by using the rear hole.

  • Page 20: Water Valve Disassembly Method

    3-23 WATER VALVE DISASSEMBLY METHOD 3-24 FAN AND FAN MOTOR DISASSEMBLY METHOD 1) Turn off the water to unit. Remove the waterline from the 1) Remove screws for the Drain Pipe Assembly and the 1 valve. connected to the Motor Cover. MOTOR COVER Figure 63 Figure 59...

  • Page 21: Top Drawer

    3-25 TOP DRAWER To remove the Converta drawer, pull the drawer open to full extension. Remove the drawer and Ice Bin lifting the basket from the rail system. 3-26 BOTTOM DRAWER To remove the freezer drawer, pull the drawer open to full extension. Remove the lower DuraBase ®basket by lifting the basket from the rail system.

  • Page 22: 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 23 5. CIRCUIT DIAGRAM - 23 -...

  • Page 24: 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 Error code 1 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 "Er rt", "Er SS", Error code 2 "Er IS(except for Icing sensor)", "Er gF", "Er It"...

  • Page 25: Circuit Diagram

    Contents 1. PCB Picture. -. Main PCB -. Display PCB 2. Troubleshooting with Error display. 1) Er FS 2) Er rS 3) Er dS 4) Er IS 5) Er CS 6) Er dH 7) Er rF 8) Er FF 9) Er IF 10) Er CF 11) Communication error 3.
  • Page 26 1. PCB Picture - Main PCB P/No & MFG Picture CON1 CON8 CON5 EBR63597802 (2011.01~) CON10 CON2 CON11 CON3 CON4 CON9 - 26 -...
  • Page 27 1. PCB Picture - Display PCB & Sub PCB P/No Picture Display PCB EBR64088201 (2010.09~) CON102 CON103 CON101 CON1 CON3 Sub PCB EBR60070707 (2010.02~) CON2 - 27 -...
  • Page 28 2. Troubleshooting With Error Display 1) Freezer Sensor Error (Er FS) Checking flow Result & SVC Action Check for a loose connection. Check the Gray/Red to Result SVC Action Gray/Red. Ω Short Change the sensor Open Replace the refrigerator Check the Temp and Other Normal resistance (Table-1)
  • Page 29 2) Refrigerator Sensor Error (Er rS) Checking flow Result & SVC Action Check for a loose connection. Check the White to White. Result SVC Action 0 Ω Short Change the sensor Open Replace the refrigerator Check the Temp and Other Normal resistance (Table-2) <Temperature table-2>...
  • Page 30 3) Icing Sensor Error (Er IS) Checking flow Result & SVC Action Check for a loose connection. Check the Blue to Blue. Result SVC Action 0 Ω Short Change the sensor Open Replace the refrigerator Check the Temp and Other Normal resistance (Table-1) <Temperature table-1>...
  • Page 31 4) Defrost Sensor Error (Er dS) Checking flow Result & SVC Action Check for a loose connection. Check the Orange to Orange. Result SVC Action 0 Ω Short Change the sensor Open Replace the refrigerator Check the Temp and Other Normal resistance (Table-3) Check the Brown to Brown.
  • Page 32 5) Defrost Heater Error (Er dH) Checking flow Result & SVC Action Check the Door gasket. Part Result SVC Action 0 Ω Go to the 3 Check the Defrost control part. Fuse-M Other Change Fuse-M Def’ Fuse 34~42 Ω Go to the 3 Def’...
  • Page 33 6) Convertible Sensor Error (Er CS) Checking flow Result & SVC Action Check for a loose connection. Result SVC Action Check the Blue/Red to Blue/Red. 0ß Ω Short Replace the refrigerator Open Change the sensor Check the Temp and Other Normal resistance (Table-2) <Temperature table-1>...
  • Page 34 7) Refrigerator Fan Error (Er rF) Checking flow Result & SVC Action Reset the unit and Input Test 1 Mode. (push the button 1 time) Open the freezer door and Status SVC Action Check the air flow. No windy Go to 3 ※...
  • Page 35 8) Freezer Fan Error (Er FF) Checking flow Result & SVC Action Reset the unit and Input Test 1 Mode. (push the button 1 time) Open the freezer door and Status SVC Action Check the air flow. No windy Go to 3 ※...
  • Page 36 9) Icing Fan Error (Er IF) Checking flow Result & SVC Action Reset the unit and Input Test 1 Mode. (push the button 1 time) Open the refrigerator door and Status SVC Action Check the air flow. No windy Go to the 3, 4 ※...
  • Page 37 10) Condenser Fan Error (Er CF) Checking flow Result & SVC Action Reset the unit and Input Test 1 Mode. (push the button 1 time) Check the fan rotating. Status SVC Action ※ While an error code is displayed, No windy Check motor the fan is not working.
  • Page 38 11) Communication Error (Er CO) Checking flow Result & SVC Action Check the loose connection. Check the Red to White/Red. Result SVC Action 12 V Go to the 3 Check the Hinge CON101 Other (loose connection) <Display> <CON101> Change the Main PCB Check the Orange to White/Red.
  • Page 39 3. Troubleshooting Without Error Display 1) Cube mode doesn’t work Checking flow Result & SVC Action Check the loose connection. Check the Black to White. Lever s/w Result SVC Action (While pushing the lever S/W) 112~115 V Go to the 3 Pushing Other Change PCB...
  • Page 40 2) Crush mode doesn’t work Checking flow Result & SVC Action Check the loose connection. Check the Sky Blue to White. Lever s/w Result SVC Action (While pushing the lever S/W) 112~115 V Go to the 3 Pushing Other Change PCB 0 ~ 2 V Go to the 3 pushing...
  • Page 41 3) Water mode doesn’t work Checking flow Result & SVC Action Check the loose connection. Check the Purple to White. Lever s/w Result SVC Action (While pushing the lever S/W) 112 ~ 115 V Go to the 3 Pushing Other Change PCB 0 ~2 V Go to the 3...
  • Page 42 4) Freezer room Lamp doesn’t work Checking flow Result & SVC Action Check the Freezer door switch. If feel sticky, Change the door s/w. Check the door S/W resistance. Status Result SVC Action 0 Ω Go to the 3 Normal Change door S/W Infinity Go to the 3...
  • Page 43 5) Refrigerator room lamp doesn’t work Checking flow Result & SVC Action Check the Refrigerator door switch. If feel sticky, Change the door s/w. Check the door S/W resistance. Status Result SVC Action 0 Ω Go to the 3 Normal Change door S/W Other Go to the 3...
  • Page 44 6) Poor cooling in Fresh food section Checking flow Result & SVC Action Check the sensor resistance. Temperature Result 38 ㏀ 23°F / -5°C 30 ㏀ 32°F / 0°C 24 ㏀ 41°F / 5°C <CON11> 19.5 ㏀ 50°F / 10°C ※...
  • Page 45 7) Poor cooling in Fresh food section Checking flow Result & SVC Action Damper checking method. Test Damper Inputting TEST Mode, SVC Action Mode state Check the damper and PCB. 1 Mode Open Damper is normal. (Check the 2 Mode Closed Change the damper mode...
  • Page 46 8) Poor cooling in Freezer compartment Checking flow Result & SVC Action Check the sensor resistance. (1) To (2) Result 40 ㏀ -22°F / -30°C 30 ㏀ -13°F / -25°C 23 ㏀ -4°F / -20°C 17 ㏀ 5°F / -15°C 13 ㏀...
  • Page 47 9) Over cooling in Fresh food compartment Checking flow Result & SVC Action Check the sensor resistance. Temperature Result 38 ㏀ 23°F / -5°C 30 ㏀ 32°F / 0°C 24 ㏀ 41°F / 5°C <CON11> 19.5 ㏀ 50°F / 10°C ※...
  • Page 48 10) Lower auto drawer doesn’t work Checking flow Result & SVC Action Check the Red to White. (Main PCB) Status Result SVC Action Go to the 2 Normal Other Change the PCB <CON4> Check the Red to White. (Auto PCB) Status Result SVC Action...
  • Page 49 Checking flow Result & SVC Action Check the Red to Yellow. (Auto PCB) Status Result SVC Action 0~5 V Go to the 7 Normal Change the Auto Other Drawer Motor <CON2> Check the Red to Blue. (Auto PCB) Status Result SVC Action 0~5 V Go to the 8...

  • Page 50: Reference

    7. Reference 4. Reference 1) TEST MODE and Removing TPA 1. How to make TEST MODE If you push the test button on the Main PCB, the refrigerator will be enter the TEST MODE * 1 time : Comp / Damper / All FAN on (All things displayed) * 2 times : Damper closed (22 22 displayed)
  • Page 51 2) TEMPERATRUE CHART - FRZ AND ICING SENSOR TEMP RESISTANCE VOLTAGE 73.29 ㏀ -39°F( -40°C) 4.09 V -30°F(-35°C) 53.63 ㏀ 3.84 V 39.66 ㏀ -30°F(-21°C) 3.55 V 29.62 ㏀ -13°F( -25°C) 3.23 V -4°F(-20°C) 22.33 ㏀ 2.89 V 5°F(-15°C) 16.99 ㏀ 2.56 V 13.05 ㏀...
  • Page 52 3) TEMPERATRUE CHART - REF AND DEF SENSOR RESISTANCE RESISTANCE VOLTAGE 225.1 ㏀ -39°F( -40°C) 4.48 V -30°F(-35°C) 169.8 ㏀ 4.33 V 129.3 ㏀ -30°F(-21°C) 4.16 V 99.30 ㏀ -13°F( -25°C) 3.95 V -4°F(-20°C) 76.96 ㏀ 3.734 V 5°F(-15°C) 60.13 ㏀ 3.487 V 47.34 ㏀...
  • Page 53 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 54: Component Testing Information

    8. COMPONENT TESTING INFORMATION 8-1 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 55 8-2 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 56 8-3 Mullion Heater Assembly Function The heater is designed to prevent the door from sweating. How to Measure Standard Test Point Ressult 1,913 Ω ~ 2,201 Ω (1) to (2) - 56 -...
  • Page 57 8-4 Door Switch Function The switch senses if the door is open or closed. - When the door open, lamp on. - When the door open, the switch give information to Micom. When the door open, internal contact operate on and off moving plunger of door switch up and down.
  • Page 58 8-5 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 9.9 ~ 12.1 Ω (1) to (2) - 58 -...
  • Page 59 8-6 AC Motor ASSEMBLY Function The motor in the door pushed the ice into the dispenser. How to < In-door Motor > < In-door Motor > Measure Separate the Separate the housing. housing. Measure the Measure the resistance between resistance between (1) and (2) (1) and (3) Check the resistance between connectors (In-door motor 1, 2) and...
  • Page 60 8-7 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 61 8-8 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 4 ~ 30 kΩ Red wire to Black wire - 61 -...

  • Page 62: Troubleshooting

    9. TROUBLESHOOTING PCB Check (Simplify) Protection Logic TEST 1 Mode A-inverter Con202 Time>30sec Power Off Power On PCB OK Disconnect & V≒200 Replace Driver PCB Check Voltage about 200V past 30second after turn on Test Mode Comp Ref. Display & sound Refer FC75(A-Inverter) TEST1...
  • Page 63 9-1 Check A - There is PC Board located in the PCB case. PCB Malfunction Check The control driver is PC board for the compressor. - This step shows the source voltage of the driver PC board. A-Inverter FC75LBNA * There is a PCB located in the PCB case next to the compressor.
  • Page 64 IPM Output check - Measure the voltage between the POWER and COMM pins of the connector as shown below. Check to make sure compressor is receiving voltage from IPM - In order to determine whether the compressor is operating normally, check the output voltage during the refrigeration cycle.
  • Page 65 9-2 Check B B1. LED blinks once, then repeats (FCT0 Fault: A-Inverter) Protection Logic Blink OFF Blink OFF - Purpose: Detecting motor current and voltage error - Check voltage at point A (Motor Voltage), point B (Motor Current) and Point C (Capacitor Voltage) when compressor is off.
  • Page 66 B3. LED blinks five times, then repeats (Locked Piston: A & E Inverters) Protection Logic Blink Blink Blink Blink Blink OFF - Purpose: To detect locked piston - Cause: Lack of oil to the cylinder, cylinder or piston damaged and or restricted discharge. A Locked Piston can also be caused by foreign materials inside the compressor.
  • Page 67 B5. LED blinks seven times, then repeats (IPM Fault: A & E Inverters) Protection Logic Blink Blink Blink Blink Blink Blink Blink OFF - Purpose: Prevent high current due to IPM Short - Cause: Damaged IPM (Dead Short) - Test for a dead short at Point A with a VOM. - Logic: Compressor is forced off and tries to restart in 2.5 minutes.
  • Page 68 9-3 Check C C1. Harness Connection Check Check Process C2. Capacitor Specifications C3. Compressor Check - Step 1. Power off. Step 2. Check capacitor spec. (table1). Step3. Check resistance of point A Step 4. Check wire harness (INF ohm). Step 5. Check resistance at point B. Step 6. Point D. Check Check Harness...
  • Page 69 9-4 Check D D1. Activate Protection logic Cycle check with protection logic - We have to check Condenser fan and Freezer fan before performing Check D - Locked Piston, Current trip and stroke trip can be activated by other problems then the driver or compressor. →...
  • Page 70 Compressor Troubleshooting Step 1) Loosen up screw of Case Assembly PCB and open Step 2) Check for blinking frequency of LED, PWB the Cover PCB If compressor is normal, it does not blink : Refer to the next page to find out what actions to take according to how many times LED blink - 70 -...
  • Page 71 LED operating condition Cause Service guideline 1. Please check, Whether connector of PCB Parts compressor is attached defect or rightly or not. after LED two - time repetiton (Stroke Trip) Compress power off 2. After the first action, Connector You check on normal miss operation of - off -...
  • Page 72 9-5 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY • 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. •...
  • Page 73 9-6 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 74 9-6-2 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 75 10. ICEMAKER OPERATING METHOD AND TROUBLE SHOOTING 10-1 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 76 10-2 ICE MAKER FUNCTIONS 10-2-1 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. 10-2-2 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 77 10-3-2 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 78 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. is shown on the display after the procedure above, Ice-detecting sensor is normal. FULL is shown on the display after the procedure above, Ice-detecting sensor is abnormal.

  • Page 79: Description Of Function & Circuit Of Micom

    11. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 11-1 FUNCTION 11-1-1 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 80 11-1-5 Light function 11-1-9 Alarm function SETTING THE DOOR ALARM SETTING THE LIGHT You can control the lamp in the dispenser. The ALARM button also controls The lamp is off when the power the door alarm that sounds three times in 30-second intervals When you press the LIGHT when a compartment door is left button, the lamp turns on, the...
  • Page 81 11-1-12 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 82 11-1-13 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 83: Exploded View & Replacement Parts List

    12. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS (LMX 28994** CAUTION: Use the part number to order part, not the position number. 603C 624E 503E 603E 626A 624G 503D 624C 207B 503G 402A 624A 409D 500P 158A 271B 103B 103A 501F 207A...
  • Page 84 FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 131A 251D 136H 503F 251B 409E 158B 203C 237F 136F 237C 252A...
  • Page 85 REFRIGERATOR PARTS 141A CAUTION: Use the part number to order part, not the position number. 141A 141B 141B 141C 141C 141A 140A 142D 142B 142A 141B 141C 141D 154A 161B 151C 151A 151B 161C 146E 161A 162B 145D 162A...
  • Page 86 DOOR PARTS (LMX 28994** CAUTION: Use the part number to order part, not the position number. 241K 241A 231B 233B 241C 233A 231A 241B 212G 235A 241K 241D 241G 241D 312B 241E 243D 243C 262C 615A 619B 603B 243A 244A 244A 243B 603C...
  • Page 87 DISPENSER PARTS CAUTION: Use the part number to order part, not the position number. 276A 276G 276F 275A 405A 276B 279A 279I 278D 279H 279J 402C 278C 501D 279D 500C 279B 279E 281B 281A...
  • Page 88 VALVE & WATER TUBE PARTS CAUTION: Use the part number to order part, not the position number. 617A 625A 616G 616D 616G 623B 616J 623B 616J 616F 627B 603C 616D 627A 619A 619E 603B...
  • Page 89 ICE MAKER & ICE BIN PARTS CAUTION: Use the part number to order part, not the position number. 630J 630J 612A 630F 630B 630C 600A 611A 607A 630A 630H 630D 606A 630E 630Q 630G...
  • Page 90 P/No. MFL62188114 SEP., 2010 Printed in Korea...

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