LG LFCS31626 Series Service Manual
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LG LFCS31626 Series Service Manual

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REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LFCS31626*
COLOR : STAINLESS(ST)

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Summary of Contents for LG LFCS31626 Series

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL : LFCS31626* COLOR : STAINLESS(ST)

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ............................... 2 1. SPECIFICATIONS ................................3 2. PARTS IDENTIFICATION ..............................4 3. DISASSEMBLY ................................. 5 REMOVING AND REPLACING REFRIGERATOR DOORS ................5 DOOR ................................6 DOOR ALIGNMENT ............................7 FAN AND FAN MOTOR........................... 7 DEFROST CONTROL ASSEMBLY ........................ 7 REFRIGERATOR LIGHT (TOP) ........................

  • Page 3: Specifications

    1. SPECIFICATIONS 1-1 LFCS31626* 30.6 cu.ft. ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Clear Drawer Type 3 /4 1 /4 1 /4 DIMENSIONS (inches) X 36 X 70 (WXDXH) 30.6cu.ft. COMPRESSOR Linear NET WEIGHT (pounds) 129kg (284lb) EVAPORATOR Fin Tube Type COOLING SYSTEM...

  • Page 4: Parts Identification

    2. PARTS IDENTIFICATION - 4 -...

  • 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. 1 1. Open door. Loosen top hinge cover screw (1). Use flat tip screwdriver to pry back hooks on front underside of cover (2). Lift up cover. 3.

  • Page 6: Door

    3-2 DOOR Door Gasket Replacement 1. Insert gasket into channel Mullion Removal Insert and press gasket into channels at doorliner. 1. Remove 2 screws. 2. Lift mullion up carefully. Mullion Replacement 1. Connect wire harness. 3. Disconnect wire harness. 2. Insert mullion into channel. Insert the mullion into channel at door as shown below.

  • Page 7: Door Alignment

    3-3 Door Alignment * Ice Fan Assembly Replacement If the level of refrigerator doors is uneven, follow the 1) Remove the plastic guide for slides on left side by instructions below to align the doors: unscrewing phillips head screws. Turn the leveling legs (CCW) to raise or (CW) to lower the 2) Pull out the cover sensor to disassemble by using tools height of the front of the refrigerator by using flat blade shown in the figure.

  • Page 8: Refrigerator Light (Top)

    3-6 Refrigerator Light (Top) 3-6-2 Refrigerator Light (Side) Unplug Refrigerator, or disconnect power at the circuit 1. Unplug refrigerator power cord from electric outlet. breaker. 2. Put flat screwdriver into sevice hole and remove cover of If necessary, remove top shelf or shelves. refrigerator light.

  • Page 9: Multi Duct

    3-6-3 Cap Duct LED LAMP(Bottom) 3-7 MULTI DUCT 1. Unplug refrigerator power cord from electric outlet. 1. Remove 2 screws and guide rail. 2. Open the refrigerator door to need diassembly. 3. Put flat screwdriver into service hole, remove the cover of cap duct LED LAMP.

  • Page 10: How To Remove And Reinstall The Pullout Drawer

    3-8 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-8-1 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 l ifting clear from each side).
  • Page 11 3-8-2 Follow Steps to Reinstall Step 1) Insert both side of supporter cover tv into Step 2) Assemble a bar and gear ice with screw. connector rails, and then screw them. Push the otherside of the gear to inside of the bar.

  • Page 12: Water Valve Disassembly Method

    WATER VALVE DISASSEMBLY METHOD 3-10 FAN MOTOR ASSEMBLY AND DISASSMEMBLY 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. 2) Remove cover and 1 screw from the valve.

  • Page 13: Pull Out Drawer

    3-11 PULL OUT DRAWER Top Drawer 1. To remove the Top drawer. Pull the drawer out to full extension. Lift the front of the drawer up, then pull it straight out. 2. To install, slightly tilt up the front and insert the drawer into the frame and push it back into push it back place. - 13 -...

  • Page 14: Caution : Sealed System Repair

    CAUTION : Sealed System Repair 3-12 Before making a sealed system repair : Start with the power cord unplugged from the outlet. Plug in the power cord and between 6 and 12 seconds after it has been pugged in, unplug it from the power source. this will allow both sides of the 3 way valve to be opened to allow for proper evacuation.

  • Page 15: Adjustment

    4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 Compressor protection logic 4-1-1 Role Since linear Comp conducts linear reciprocating motion, 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 16: Circuit Diagram

    5. CIRCUIT DIAGRAM - 16 -...

  • Page 17: Troubleshooting

    6. TROUBLESHOOTING NOTE) - When 3 hours passed after error happen,all main errors are displayed on display panel except sub error. - Sub error not displayed before press the Ice Plus button and freezer button simulataneously. - Sub errors as follow : “rt E”, “SS E”, “IS E”, “It E”, “HS E” - 17 -...
  • Page 18 - 18 -...

  • Page 19: Pcb Picture

    7. PCB Picture 7-1. Main PCB ( P/N : EBR78940504) ( P/N : EBR78940504) CON8 CON7 CON201 CON6 CON3 CON5 CON2 CON1 7-2. Display PCB ( P/N : EBR78723604_LED PCBA) ( P/N : EBR78723404_Control PCBA) - 19 -...

  • Page 20: Troubleshooting

    8. Trouble Shooting 8-1. Freezer Sensor Error (FS E) Symptom Check Point 1. FS E 1. Check f or a loose connection 2. Check Sensor Resistance CON8 CON7 CON201 CON6 CON7 CON3 CON5 CON2 CON1 Resistance [Ω] Short CON7 Open pin ~ 18 Other Normal...
  • Page 21 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? CON7 Check the Temperature and resistance ref er to the table. No problem? CON7 Resistance [Ω] pin ~18...
  • Page 22 8-2. Refrigerator Sensor Error (rS E) Symptom Check Point 1. rS E 1. Check f or a loose connection 2. Check Sensor Resistance CON8 CON7 CON201 CON6 CON7 CON3 CON5 CON2 CON1 Resistance [Ω] Short CON7 Open pin ~ 16 Other Normal CON7...
  • Page 23 Refrigerator Sensor Error (E rS) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB and Is resistance normal? connector sensor? CON7 Check the Temperature and resistance ref er to the table. No problem? CON7 Resistance [Ω] pin ~ 16...
  • Page 24 8-3. Defrost Sensor Error (dS F) Symptom Check Point 1dS F 1. Check f or a loose connection 2. Check Sensor Resistance Defrost Controller Defrost Controller CON8 CON7 CON201 CON6 CON7 CON3 CON5 CON2 CON1 Resistance [Ω] Short CON7 Open pin ~ 20 Other Normal...
  • Page 25 Defrost Sensor Error(dS F) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB, Is resistance normal? connector Def rost controller and Sensor? CON7 Check the Temperature and resistance ref er to the table. No problem? CON7 Resistance [Ω]...
  • Page 26 8-4. Defrost Sensor Error (dS r) Symptom Check Point 1. dS r 1. Check f or a loose connection 2. Check Sensor Resistance Defrost Controller CON8 CON7 CON201 CON6 CON7 CON3 CON5 CON2 CON1 Resistance [Ω] Short CON7 Open pin ~ 14 Other Normal CON7...
  • Page 27 Defrost Sensor Error (r dS) Reconnect or Is the Connector disconnected Check the Sensor resistance. repair the or loose between Main PCB, Is resistance normal? connector Def rost controller and Sensor? CON7 Check the Temperature and resistance ref er to the table. No problem? CON7 Resistance [Ω]...
  • Page 28 8-5. Defrost Heater Error (dH F) Symptom Check Point 1. dH F 1. Check the door gasket 2. Check the Def rost control part 3. Check the PCB output voltage 4. Check Def rost Heater CON8 CON7 CON201 CON3 CON6 CON3 CON5 CON2...
  • Page 29 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 112~116V? Change TEST MODE 3 Voltage [V] Fuse-M Check the Def rost control part.
  • Page 30 Reconnect Replace Is the Connector Properly connected? Defrost Is the resistance value of defrost sensor as Sensor follow? Resistance is influenced by temperature. CON7 Resistance [Ω] 19 th pin ~ 20 th pin 23ºF / -5ºC Change Fuse - M 32ºF / 0ºC Is the resistance value of Fuse 41ºF / 5ºC...
  • Page 31 8-6. Defrost Heater Error (dH r) Symptom Check Point 1. dH r 1. Check the door gasket 2. Check the Def rost control part 3. Check the PCB output voltage 4. Check Def rost Heater Defrost Controller CON8 CON7 CON201 CON3 CON6 CON3...
  • Page 32 Defrost Heater Error (dH r) 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? Change TEST MODE 3 Voltage [V] Fuse-M Check the Def rost control part.
  • Page 33 Is the Connector Properly Replace Reconnect connected? Defrost Is the resistance value of defrost Sensor sensor as follow? Resistance is influenced by temperature. Change Fuse Sensor Is the resistance value of Fuse less than 0.2Ω? CON7 Resistance [Ω] 19 th pin ~ 20 th pin 23ºF / -5ºC Fuse - M 32ºF / 0ºC...
  • Page 34 8-7. Freezer Fan Error (FF E) Symptom Check Point 1. FF E 1. Check the air f low 2. Check the Fan Motor 2. Check the PCB Fan motor voltage Fan Motor Fan Motor CON8 CON7 CON201 CON6 CON7 CON3 CON5 CON2 CON1...
  • Page 35 Freezer Fan Error (FF E) Reset the unit and Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage Main PCB Is Fan Motor voltage 8~12V? TEST MODE 1 Voltage [V] Go to 3 Open the f reezer door and Check CON7 8~12V the air f low.
  • Page 36 8-8. Icing Fan Error (rF E) Symptom Check Point 1. rF E 1. Check the air f low 2. Check the Connector 2. Check the PCB Fan motor voltage Duct CON8 CON7 CON201 CON6 CON6 CON3 CON5 CON2 CON1 TEST MODE 1 Voltage [V] CON6 8~12V...
  • Page 37 Freezer Fan Error (rF E) Reset the unit and Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage Main PCB Is Fan Motor voltage 8~12V? TEST MODE 1 Voltage [V] Go to 3 Open the f reezer door and Check CON6 8~12V the air f low.
  • Page 38 8-9. Condenser Fan Error (CF E) Symptom Check Point 1. CF E 1. Check the air f low 2. Check the Connector 2. Check the PCB Fan motor voltage Fan Motor CON8 CON7 CON201 CON6 CON7 CON3 CON5 CON2 CON1 TEST MODE 1 Voltage [V] CON7...
  • Page 39 Condenser Fan Error (CF E) Reset the unit and Input Test1 Mode. Replace (Push the button 1 time) Check the Fan Motor voltage Main PCB Is Fan Motor voltage 8~12V? TEST MODE 1 Voltage [V] Go to 3 Check the f an rotating. CON7 8~12V Does f an rotate?
  • Page 40 8-10. Communication Error (CO E) Symptom Check Point 1. CO E 1. Check the loose connection 2. Check the Hinge connection CON101 CON102 CON103 CON8 CON7 CON201 CON6 CON101 CON5 CON3 CON2 CON5 CON1 Voltage [V] CON101 pin ~ 2 CON101 Not 0V, 5V pin ~ 3...
  • Page 41 Communication Error (CO E) Change the Main PCB Check the voltage. Is CON101 1 pin ~ 3 voltage 0V or 5V? CON101 Check the loose connection Voltage CON101 pin ~ 4 0V, 5V Check the Check the voltage. Hinge (loose Is CON101 3 pin ~ 4 connection)
  • Page 42 8-11. Freezer room lamp doesn’t work Symptom Check Point 1. Freezer room lamp 1. Check the f reezer door switch doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp LED Lamp CON8 CON7 CON201 LED Lamp CON6 CON3 CON2...
  • Page 43 Freezer room lamp doesn’t work Explain to Change the The Switch senses if the door is customer LED Lamp Check the LED Lamp voltage open or close. Is voltage 12V? When the door open, lamp On LED Lamp When the door Close, lamp Of f LED Lamp Change the Check the door S/W resistance.
  • Page 44 8-12. Refrigerator room lamp doesn’t work Symptom Check Point 1. Ref rigerator room 1. Check the Ref rigerator door switch lamp doesn’t work 2. Check the door S/W resistance 3. Check the LED Lamp CON8 CON7 CON201 LED Lamp CON6 CON3 CON2 CON5...
  • Page 45 Refrigerator room lamp doesn’t work Explain to Change the The Switch senses if the door is customer LED Lamp Check the LED Lamp voltage open or close. Is voltage 12V? When the door open, lamp On When the door Close, lamp Of f LED Lamp Change the Check the door S/W resistance.
  • Page 46 8-13. Poor cooling in Fresh food section Symptom Check Point 1. Poor cooling in Fresh 1. Check the sensor resistance f ood section 2. Check the air f low 3. Check the air Temperature 4.Check the Fan motor sticky 5. Check the Fan motor voltage CON8 CON7 CON201...
  • Page 47 Poor cooling in Fresh food section Check the Compressor Check the air temperature. and sealed Is it cold? system Check the sensor resistance. CON7 Go to 7 CON7 Replace Resistance [Ω] Check the Fan Motor voltage Main PCB pin ~ 16 Is Fan Motor voltage 8~12V? 23ºF / -5ºC 32ºF / 0ºC...
  • Page 48 8-14. Poor cooling in Freezer compartment Symptom Check Point 1. Poor cooling in 1. Check the sensor resistance Freezer compartment 2. Check the air f low 3. Check the air Temperature 4.Check the Fan motor sticky 5. Check the Fan motor voltage CON8 CON7 CON201...
  • Page 49 Poor cooling in Freezer compartment Check the Compressor Check the air temperature. and sealed Is it cold? system Check the sensor resistance. Change the CON7 Resistance [Ω] Fan motor Check the Fan motor. pin ~ 18 Rotate f an using hand. -22ºF / -30ºC It f eel sticky? -13ºF / -25ºC...
  • Page 50 Replace Check the Fan Motor voltage Main PCB Is Fan Motor voltage 8~12V? TEST MODE 1 Voltage [V] CON7 8~12V pin ~ 12 Change the Check the Fan Motor voltage motor Is Fan Feed Back voltage 1~5V? TEST MODE 1 Voltage [V] CON7 Not 0V, 5V...

  • Page 51: Reference

    9. Reference 9. 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 52 9-2 TEMPERATRUE CHART - FREEZER AND ICING SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 4.09 V 73.29 -30°F (-35°C) 3.84 V 53.63 -30°F (-21°C) 3.55 V 39.66 -13°F (-25°C) 3.23 V 29.62 -4°F (-20°C) 22.33 2.89 V 5°F (-15°C) 2.56 V 16.99 14°F (-10°C) 13.05...
  • Page 53 9-3 TEMPERATRUE CHART - REFRIGERATOR AND DEFROST SENSOR TEMP RESISTANCE VOLTAGE -39°F (-40°C) 4.48 V 225.1 -30°F (-35°C) 4.33 V 169.8 -30°F (-21°C) 4.16 V 129.3 -13°F (-25°C) 3.95 V 99.30 -4°F (-20°C) 76.96 3.734 V 5°F (-15°C) 3.487 V 60.13 14°F (-10°C) 47.34...

  • Page 54: Component Testing Information

    10. COMPONENT TESTING INFORMATION 10-1 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 10-2 Sheath Heater (Freezer Room) Function Sheath heater is the part for defrost. All heating wire is connected to only one line. So we can decide part is defective or not when we check the resistance. How to Measure (1) (2) Set a ohmmeter connect to The housing pins.
  • Page 56 10-2 Sheath Heater (Freezer Room) Function Sheath heater is the part for defrost. All heating wire is connected to only one line. So we can decide part is defective or not when we check the resistance. How to Measure Set a ohmmeter connect to The housing pins. Measure the pins connected to Sheath Heater.
  • Page 57 10-3 Sheath Heater (Refrigerator Room) Function Sheath heater is the part for defrost. All heating wire is connected to only one line. So we can decide part is defective or not when we check the resistance. How to Measure Set a ohmmeter connect to The housing pins. Measure the pins connected to Sheath Heater.
  • Page 58 10-4 Door Switch Check Voltage between pin 13 and 14 CON5 Check the Reed S/W resistance -.No Magnet Magnet Center Magnet Center Switch Center Switch Center Good position Bad position -.Magnet Near the Switch -.Resistance & Service Action - 58 -...
  • Page 59 Push Hook Push Hook Push second Push first - 59 -...
  • Page 60 Check Voltage between pin 21 and 22 CON7 Check the Reed S/W resistance -.Magnet must be center of Switch -.No Magnet Magnet Center Magnet Center Switch Center Switch Center Good position Bad position -.Magnet Near the Switch -.Resistance & Service Action - 60 -...
  • Page 61 Push First push Second push - 61 -...
  • Page 62 10-5 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 - 62 -...
  • Page 63 10-6 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 64 10-7 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 65 10-8 Lamp Socket Function The lamp socket connect cover lamp assembly to lamp. The lamp socket fix lamp and unite lamp and cover lamp assembly. The lamp socket supply electric source to lamp also. How to Measure Check the resistance between connector of housing and connector of lamp socket. It means check whether or not applying an electric current.
  • Page 66 10-9 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 - 66 -...

  • Page 67: Compressor Troubleshooting

    11. Compressor Troubleshooting PCB Check (Simplify) Protection Logic TEST 1 Mode A-inverter Con201 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 &...
  • Page 68 11-1 Check A - There is PC Board located in the PCB case. The control driver is PC board for the compressor. - This step shows the source voltage of the driver PC board. Step1. Open PCB Cover Step2. Check Driver PCB LED Lamp * Driver PCB located in machine room.
  • Page 69 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 70 11-2 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 71 B3. LED blinks three times, then repeats (Stroke Trip) Protection Logic Blink Blink Blink Blink Blink Blink - Purpose : Prevent over voltage and current detecting connecting error. - Cause : -.Connecting error of PCB and Comp, Capacitor harness -. Comp insulation damage. - Logic : Compressor is forced off and tries to restart within 40 seconds.
  • Page 72 B4. 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 73 B6. LED blinks seven times, then repeats (IPM Fault: A & E Inverters) 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 20 seconds.
  • Page 74 B7. LED Blinks eight times, then repeats (Communication Error) Blink Blink Blink Blink Blink Blink Blink Blink - Purpose: To detect Set control Micom and communication error - Cause : Communication Error - Logic : LED blink. (Compressor runs reference value before occuring communication Error) 1.
  • Page 75 11-3 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 76 11-4 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 77 Compressor Troubleshooting WARNING HIGH VOLTAGE Step 1) Open PCB cover Step 2) Check for blinking frequency of LED and PCB LED Lamp When 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 - 77 -...
  • Page 78 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 79 11-5 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 80 11-6 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 81 11-6-2 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 82: Icemaker(Freezer Room) Opearting And Trouble Shooting

    13. ICE MAKER (Freezer Room) OPERATING METHOD AND TROUBLE SHOOTING 13-1 Working Principles 14-1-1 Ice Maker Working Principles Power Input Level Ice Maker Cube Mould for “Initial Control” Initial Control after power is input. Ice Making Wait until the water in the cube mould is frozen Control after ice maker starts operation.
  • Page 83 13-2 Function of Ice Maker 13-2-1 Initial Control Function 1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion of MICOM initialization. The detecting lever moves up and down. 2.
  • Page 84 13-2-4 Ice Ejection Control Function 1. This is to eject ice from ice maker cube mould after ice making is completed. 2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice ejection but waits.
  • Page 85 13-2-5 Test Function 1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic ice maker. The test function starts when the test switch is pressed for more than 0.5 second. 2.

  • Page 86: Description Of Function & Circuit Of Micom

    13. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM 13-1 FUNCTION 13-1-1 Function - When the appliance is plugged in, default set values are 37 for Refrigerator and 0 for freezer. - You can adjust Refirgerator and freezer control temperature by pressing ADJUST button on display 1.
  • Page 87 13-1-4 Water Filter condition display fucntion 1. There is a replacement indicator light for the water filtter cartridge. 2. Water filter needs replacement every six months for using water filter. 3. When the Replace Icon blinks, you must exchange the filter 4.
  • Page 88 13-1-7 CONTROL OF FREEZER FAN MOTOR 1. Freezer fan motor has high and standar speed. 2. When refrigerator is overloaded, fan motor runs in high speed as powered-up Standard speeds is used for general purposes. 3. To improve cooling speed, the RPM of freezer fan motor changs from normal speed to high. 13-1-8 Cooling Fan Motor 1.
  • Page 89 13-1-15 Defrosting (removing frost) 1. Defrosting starts each time the COMPRESSOR running time Betwee 7~50 hours. 2. Defrosting stops if the sensor temperature reaches 41°F(5°C) or more. If the sensor doesn’t reach 41°F(5°C) in 1 hours, the defrost mode is malfunctioning. (Refer to the defect diagnosis function) 3.

  • Page 90: Exploded View & Replacement Parts List

    14. EXPLODED VIEW & REPLACEMENT PARTS LIST CASE PARTS CAUTION : Use the part number to order part, not the position number. 502C 603C 503E 603E 626A 624E 410P 410R 207B 624G 402A 503D 624C 500P 503C 409D 158A 103B 610F 271B 503G...
  • Page 91 FREEZER PARTS CAUTION: Use the part number to order part, not the position number. 145C 243J 133B 131A 136B 136C 145F 243J 133C 132P 237C 136A...
  • Page 92 REFRIGERATOR PARTS CAUTION: Use the part number to order part, not the position number. 141H 142B 141A 143A 142A 142D 141F 141B 141H 141H 141A 141A 141F 141B 141F 141B 255A 255B 154D 177C 255A 132P 177E 161B 161C 177D 133E 161A 133E...
  • Page 93 DOOR PARTS CAUTION: Use the part number to order part, not the position number. 205F 180A 241A 241C 231B 233B 233A 231A 212G 235A 241K 241B 241K 241E 241K 241E 205E 243D 243C 262C 243A 262C 244A 244A 405M 262E 243B 409I 405M...
  • Page 94 VALVE & WATER TUBE PARTS CAUTION: Use the part number to order part, not the position number. 625A 616D 616F 627A 621B 616E 623A 619A...
  • Page 95 ICE MAKER & ICE BIN PARTS CAUTION: Use the part number to order part, not the position number. Freezer Room 600F 600B...
  • Page 96 P/No. MFL68488616 SEP., 2014 Printed in Korea...

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