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LG LFX31915 Series, Service Manual

The LG LFX31915 Series is a high-quality refrigerator designed to enhance your kitchen experience. With its advanced energy-saving features, this appliance ensures optimal efficiency while keeping your food fresh. Access the detailed user manual for free download from 88.208.23.73:8080, providing essential guidance and instructions for convenient use.

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CONTENTS

SAFETY PRECAUTIONS  ....................................................................................................................................................... 2

1. SPECIFICATIONS ............................................................................................................................................................. 3

2. PARTS IDENTIFICATION  ................................................................................................................................................. 4

3. DISASSEMBLY ............................................................................................................................................................ 5-18

REMOVING AND REPLACING REFRIGERATOR DOORS  .......................................................................... 5
DOOR .............................................................................................................................................................. 6
DOOR ALIGNMENT  ....................................................................................................................................... 7
FAN AND FAN MOTOR................................................................................................................................... 7
DEFROST CONTROL ASSEMBLY ................................................................................................................ 7
REFRIGERATOR LIGHT (TOP) .................................................................................................................. 8-9
MULTI DUCT  .................................................................................................................................................. 9
DISPENSER ................................................................................................................................................. 10
DISPLAY PCB  .............................................................................................................................................. 10
ICE BUTTON ASSEMBLY ............................................................................................................................ 10
WATER BUTTON ASSMEBLY ..................................................................................................................... 10
ICE CORNER DOOR REPLACEMENT ........................................................................................................ 10
ICEMAKER REPLACEMENT  ....................................................................................................................... 11
SUB PCB FOR WORKING DISPENSER  ..................................................................................................... 11
CAP DUCT MOTOR REPLACEMENT  ......................................................................................................... 12
HOW TO REMOVE A ICE BIN  ..................................................................................................................... 13
HOW TO INSERT A ICE BIN ........................................................................................................................ 13
HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER  ......................................................... 14-15
WATER VALVE DISASSEMBLY METHOD  ................................................................................................. 16
FAN AND FAN MOTOR DISASSEMBLY METHOD...................................................................................... 16
PULL OUT DRAWER  ................................................................................................................................... 17
CAUTION : SEALED SYSTEM REPAIR  ...................................................................................................... 18

4. ADJUSTMENT ................................................................................................................................................................ 19

COMPRESSOR ................................................................................................................................................................ 19

5. CIRCUIT DIAGRAM  ........................................................................................................................................................ 20

6. TROUBLESHOOTING .................................................................................................................................................... 21

7. PCB PICTURE  ........................................................................................................................................................... 22-23

8.  TROUBLESHOOTING WITH ERROR DISPLAY ....................................................................................................... 24-35

9.  TROUBLESHOOTING WITHOUT ERROR DISPLAY ................................................................................................ 36-44

10. REFERENCE  ............................................................................................................................................................. 45-48

11. COMPONENT TESTING INFORMATION  ................................................................................................................. 49-57

12. TROUBLESHOOTING   .............................................................................................................................................. 58-70

13. ICEMAKER OPEARTING AND TROUBLE SHOOTING METHOD   ......................................................................... 71-74

14. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM ........................................................................................... 75-78

SAFETY PRECAUTIONS

Please read the following instructions before servicing your refrigerator.

1. Unplug the power before handling any elctrical componets.

2. Check the rated current, voltage, and capacity.

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.

Summary of Contents for LFX31915 Series

Page 1: ...CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LFX31915 COLOR STAINLESS ST SMOOTH BLACK SB SUPER WHITE SW REFRIGERATOR SERVICE MANUAL ...

Page 2: ...TOR DISASSEMBLY METHOD 16 PULL OUT DRAWER 17 CAUTION SEALED SYSTEM REPAIR 18 4 ADJUSTMENT 19 COMPRESSOR 19 5 CIRCUIT DIAGRAM 20 6 TROUBLESHOOTING 21 7 PCB PICTURE 22 23 8 TROUBLESHOOTING WITH ERROR DISPLAY 24 35 9 TROUBLESHOOTING WITHOUT ERROR DISPLAY 36 44 10 REFERENCE 45 48 11 COMPONENT TESTING INFORMATION 49 57 12 TROUBLESHOOTING 58 70 13 ICEMAKER OPEARTING AND TROUBLE SHOOTING METHOD 71 74 14 ...

Page 3: ...ETABLE TRAY COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE ITEMS Clear Drawer Type Linear Fin Tube Type Spiral Condenser R 134a 135 g ISO10 280 ml SHEATH HEATER LED Module LED Module SPECIFICATIONS LAMP REFRIGERATOR FREEZER DIMENSIONS Depth w Handles Depth w o Handles Depth w o Door Depth Total with Door Open Height to Top of Case Height to Top of Door Hinge Width Wi...

Page 4: ... temperature than the regular refrigerator area F Basket Area in the freezer that allows you to fill smaller items for quick cooling Indoor Ice Bin Ice cubes are automatically produced Crisper Controls humidity and helps vegetables and fruit to stay crisp Fixed Door Bin Used to preserve chilled food or drinks Pull out Drawer Used for extra storage within the freezer compartment Durabase and Duraba...

Page 5: ...dle hinge pin and remove door 8 Place the door with the insides facing up on a not scratch surface CAUTION When lifting hinge free from the latch be careful that door does not fall forward Right Door FIG 3 1 Open the door remove 1 screw on the top of the hinge cover Loosen top hinge cover screw 1 Lift up cover 2 2 Disconnect door switch wire harness and remove the cover 3 Rotate hinge lever 3 cloc...

Page 6: ... Door Gasket Removal 2 Lift mullion up carefully 3 Disconnect wire harness Door Gasket Replacement 1 Insert gasket into channel Insert and press gasket into channels at doorliner 2 Insert mullion into channel Insert the mullion into channel at door as shown below Mullion Replacement 1 Connect wire harness 3 Assemble 2 screws Gasket Gasket Channel ...

Page 7: ...rille assembly Figure 1 2 Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap Figure 2 GRILLE ASSEMBLY DEFROST CONTROL ASSEMBLY 3 3 Door Alignment If the level of refrigerator doors is uneven follow the instructions below to align the doors Turn the leveling legs CCW to raise or CW to lower the height of the front of the refr...

Page 8: ... to remove the cover lamp 5 To remove the LED Assembly open the Hook part to pull it out as shown in the following picture Cover lamp Case lamp LED Assembly 3 To remove the case lamp and cover lamp release another 2 screws as following picture 3 6 2 Refrigerator Light Side 1 Unplug refrigerator power cord from electric outlet 2 Put flat screwdriver into sevice hole and remove cover of refrigerator...

Page 9: ...o service hole remove the cover of cap duct LED LAMP 5 Replace LED assembly 6 Assembly the cover in reverse order 4 Remove the LED assembly from connector 1 Remove 2 screws and guide rail 2 Remove the upper and lower Caps by using a flat screwdriver and remove 2 screws as shown figure 3 Disconnect the lead wire on the bottom position 4 Grip both side of multi duct pull it out ...

Page 10: ...spenser pull forward to remove 3 9 DISPLAY PCB As shown below remove 1 screw on the PCB fixing screw Remove the display PCB fixing screw 3 10 ICE BUTTON ASSEMBLY 1 Remove the 1 screw holding the lever 2 Remove the spring from the hook 3 Push and pull on the tab to remove CAUTION When replacing the dispenser cover make sure the lead wire does NOT come off and the water line is not pinched by the di...

Page 11: ...l slowly 3 Disconnect wire harness from wall of compartment In door motor 3 14 SUB PCB FOR WORKING DISPENSER 1 Disconnect the wire harness 2 Remove 1 screw from PCB and replace with new PCB CAUTION Make sure that the motor housing is taped to the mold if not positioned correctly the cover will not fit properly ...

Page 12: ...the Housing of the Cap Duct Motor 3 When replacing the motor check the position of the door duct and the link for proper fit Link Duct Door Cap Duct Motor NG Position 2 Unscrew 3 screws to disassemble the motor 4 Insert 2 screws 5 Push housing aside ...

Page 13: ...A ICE BIN 1 Grip the handles as shown 2 Tilt and lift slightly as shown 3 17 HOW TO INSERT A ICE BIN 1 Insert the Ice Bin slightly tilting to avoid touching the Icemaker Especially Ice Detecting Sensor 3 Remove ice bin slowly ...

Page 14: ...rom the guide rails one from each side Step 2 Remove the lower basket Step 4 Removal of the freezer door is done by l ifting clear of the rail support Fully extend both rails Step 5 Remove only 1 screw of gearice and disassemble the bar and gearice Step 6 Remove 2 screws of both side of supporter covers tv and disassemble the supporter cover tv ...

Page 15: ...the way into the freezer section Pull the rails back out to full extension Step 7 Reinstall the two screws into the guide rails one from each side Step 1 Insert both side of supporter cover tv into connector rails and then screw them Step 2 Assemble a bar and gear ice with screw Push the otherside of the gear to inside of the bar Step 3 Put gear ice assembled with the bar by screw into connector r...

Page 16: ...alve to catch any water that may come out Pull out the clip and press the collet to separte the water line from the valve Mechanical Cover Housing MOTOR COVER 2 Pull and separate the FAN ASSEMBLY and MOTOR turning counterclockwise based on the MOTOR SHAFT FAN ASSEMBLY MOTOR The assembly is in the reverse order of the disassembly and take special care for the following details 1 Be careful not to b...

Page 17: ... 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 ...

Page 18: ...aporator The 3 way valve has plastic parts inside so always wrap it with a wet cloth before servicing when using a torch 1 Always replace the 3 way valve if there is a leak at any one of the 3 tubes coming from it 2 Service in replacement of valve valve failure Perform service in the same method as above Note To service sealed system follow the directions in 3 22 and 3 23 above Then service is the...

Page 19: ... voltage and over current 2 Do not drop or handle carelessly 3 Keep away from any liquid If liquid such as oil or water enters the Cover PTC Compressor may fail due to breakdown of their insulating capabilities 4 Always use the Parts designed for the compressor and make sure it is properly attached to the compressor Parts may appear physically identical but could have different electrical ratings ...

Page 20: ... 20 5 CIRCUIT DIAGRAM ...

Page 21: ...or Error Er HS Short or Disconnection Of Humidity 7 Icing Sensor Error Er IS Short or disconnection of the sensor about Ice maker Icing sensor Ice maker sensor 8 Pantry sensor error Er SS Short or Disconnection of Pantry Sensor 12 Freezer Defrosting Error F dH Even though it is passed 80Minute since then Defrosting If Defrosting sensor is not Over 40 F 5 C it is caused Temperature Fuse Disconnecti...

Page 22: ... 22 7 PCB PICTURE 7 1 Main PCB P No MFG EBR75234702 2011 01 Picture CON2 CON3 CON1 CON5 CON6 CON7 ...

Page 23: ... 23 7 2 Display PCB Sub PCB P No Display PCB EBR 729554 2011 03 Sub PCB EBR60070709 2011 01 Picture ...

Page 24: ...ce Table 1 Result SVC Action 8 1 Freezer Sensor Error Er FS No 1 2 Checking flow Check for a loose connection Check the Blue White to Blue White Result SVC Action CON7 Temperature table 1 1 To 2 22 F C 13 F C 4 F C 5 F C 14 F C 23 F C 32 F C Result 40 30 23 17 13 10 8 The sensor is determined by the temperature For example 23 indicates 4 F ...

Page 25: ...sult SVC Action 8 2 Refrigerator Sensor Error Er rS No 1 2 Checking flow Check for a loose connection Check the White to White Result SVC Action Temperature table 2 1 To 2 23 F C 32 F C 41 F C 50 F C 59 F C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 30 indicates 32 F CON7 ...

Page 26: ... and resistance Table 1 Result SVC Action No 1 2 Checking flow Check for a loose connection Check the Blue to Blue Result SVC Action Temperature table 1 1 To 2 22 F C 13 F C 4 F C 5 F C 14 F C 23 F C 32 F C Result 40 30 23 17 13 10 8 The sensor is determined by the temperature For example 23 indicates 4 F CON5 ...

Page 27: ... 8 4 Defrost Sensor Error F dS No 1 2 Checking flow Check for a loose connection Check the Orange to Orange Result SVC Action Check the Brown to Brown Temperature table 3 1 To 2 23 F C 32 F C 41 F C 50 F C 59 F C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 24 indicates 41 F CON7 1 2 1 2 ...

Page 28: ...ction 8 5 Defrost Sensor Error R dS No 1 2 Checking flow Check for a loose connection Check the Orange to Orange Result SVC Action Check the Gray to Gray Temperature table 3 1 To 2 23 F C 32 F C 41 F C 50 F C 59 F C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 24 indicates 41 F CON7 ...

Page 29: ...low Check the Door gasket Check the Defrost control part 3 Input Test 3 Mode Push the button 3 times 4 Check the Blue to Orange Result SVC Action Fuse M Def Heater Defrost Sensor 5 Release the test mode push the button 1 times normal CON3 CON3 Result 112 116 V 0 V SVC Action Go to the 5 Replace Main PCB 6 Check the Blue to Orange Result 0 V 112 116 V SVC Action Explain to customer Replace Main PCB...

Page 30: ...low Check the Door gasket Check the Defrost control part 3 Input Test 3 Mode Push the button 3 times 4 Check the Blue to Yellow Result SVC Action Fuse M Def Heater Defrost Sensor 5 Release the test mode push the button 1 times normal CON3 CON3 Result 112 116 V 0 V SVC Action Go to the 5 Replace Main PCB 6 Check the Blue to Yellow Result 0 V 112 116 V SVC Action Explain to customer Replace Main PCB...

Page 31: ... Input Test 1 Mode Push the button 1 time Open the freezer door and Check the air flow 4 Check the Fan motor voltage Result SVC Action Below 12 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action CON6 3 2 1 Status No windy Windy SVC Action Go to 3 Go to 4 ...

Page 32: ...r and Check the air flow 3 Check the Fan motor Rotate fan using your hand It feel sticky change the motor cause of ice or rust inside of motor 4 Check the Fan motor voltage Result SVC Action Below 12 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action Status No windy Windy SVC Action Go to 3 Go to 4 CON7 3 2 1 ...

Page 33: ...1 time Open the Refrigerator door and Check the air flow 3 Check the Connector Frozen caused the PCB short Result SVC Action Status No windy Windy SVC Action Go to the 3 4 Go to the 5 4 Check the Fan motor voltage Below 9 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action CON7 3 2 1 ...

Page 34: ...heck the fan rotating 3 Check the Fan motor and surrounding Rotate fan using your hand It feel sticky change the motor Result SVC Action 4 Check the Fan motor voltage Status No windy Windy SVC Action Check motor Go to the 4 Below 10 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action CON7 3 2 1 ...

Page 35: ...6 Check the White Red to White Black CON5 CON5 CON101 3 Check the Orange to White Red Result 0 or 5 V Other SVC Action Change the Display PCB Go to the 4 4 Check the White Black to White Red Result 0 or 5 V Other SVC Action Change the Main PCB Go to the 5 Result 0 or 5 V Other SVC Action Change the Display PCB Go to the 6 Result 0 or 5 V Other SVC Action Change the Main PCB Explain to customer CON...

Page 36: ...S W 4 Check the resistance value CON1 Ice Maker Geared Motor Dispenser Motor 2 1 3 4 Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 3 Change PCB Go to the 3 Change PCB Lever s w Result SVC Action Pushing Not pushing 9 12 V Other 0 2 V Other Go to the 4 Change PCB Go to the 4 Change PCB Lever s w Result SVC Action 1 to 2 3 to 4 31 1 42 1 Other 9 9 12 1 Other Explain Replace Geared Motor ...

Page 37: ...sistance value CON1 Ice Maker Geared Motor Dispenser Motor 2 1 3 4 Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 3 Change PCB Go to the 3 Change PCB Lever s w Result SVC Action Pushing Not pushing 9 12 V Other 0 2 V Other Go to the 4 Change PCB Go to the 4 Change PCB Lever s w Result SVC Action 1 to 2 3 to 4 31 1 42 1 Other 9 9 12 1 Other Explain Replace Geared Motor Explain Replace Ge...

Page 38: ...pushing 112 115 V Other 0 2 V Other Go to the 3 Change PCB Go to the 3 Change PCB Lever s w Result SVC Action 1 to 2 3 to 4 360 420 Other 360 420 Other Explain Replace Water Valve Explain Replace Water Valve Point Result SVC Action 1 2 Dispenser Ice Maker CON2 CON2 2 Check the Purple to White While pushing the lever S W Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 4 Change PCB Go to t...

Page 39: ...osed Open 0 2 V Other 12 V Other Explain to customer Change the Door S W Explain to customer Change the LED Lamp Status Result SVC Action Normal Push S W 0 not Infinity Other Go to the 3 Change door S W Go to the 3 Change door S W Status Result SVC Action Normal 12 V Other Go to the 4 Change the PCB Status Result SVC Action Normal 12 V Other Go to the 5 Change the LED Lamp Status Result SVC Action...

Page 40: ... Closed Open 0 2 V Other 12 V Other Explain to customer Change the Door S W Explain to customer Change the LED Lamp Status Result SVC Action Normal Push S W 0 Other Infinity Other Go to the 3 Change door Switch Go to the 3 Change door Switch Status Result SVC Action Normal 12 V Other Go to the 4 Change the PCB Status Result SVC Action Normal 12 V Other Go to the 5 Change the LED Lamp Status Result...

Page 41: ...r hand The sensor is determined by the temperature For example 30 indicates 32 F Result SVC Action CON7 Temperature 23 F C 32 F C 41 F C 50 F C 59 F C Result 38 30 24 19 5 16 Status Windy No windy SVC Action Go to the 4 Check the R Fan motor Check the damper Go to the 6 5 Check the air temperature Cold or not Status Cold Not cold SVC Action Explain to customer Check the Compressor And sealed syste...

Page 42: ... 42 No Checking flow Result SVC Action 6 Check the R Fan motor voltage Below 12 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action CON6 3 2 1 ...

Page 43: ... the air flow The sensor is determined by the temperature For example 23 indicates 4 F Result SVC Action CON7 Status Windy No windy SVC Action Go to the 4 Check the F Fan motor 4 Check the air temperature Cold or not Status Cold Not cold SVC Action Explain to customer Check the Compressor And sealed system 1 To 2 22 F C 13 F C 4 F C 5 F C 14 F C 23 F C 32 F C Result 40 30 23 17 13 10 8 ...

Page 44: ...d It feel sticky change the motor cause of ice or rust inside of motor 7 Check the F Fan motor voltage Result SVC Action Below 12 V 0 or 5 V 1 2 1 3 Change the PCB Change the motor Point Result SVC Action Sticky Motor Change the motor Point Result SVC Action CON7 3 2 1 ...

Page 45: ...w to make TEST MODE If you push the test button on the Main PCB the refrigerator will be enter the TEST MODE 2 How to remove Terminal Position Assurance TPA 1 time Comp Damper All FAN on All things displayed 2 times Damper closed 22 22 displayed 3 times Forced defrost mode 33 33 displayed Main PCB AC TPA DC TPA ...

Page 46: ...3 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C 68 F 20 C 77 F 25 C 86 F 30 C 95 F 35 C 104 F 40 C RESISTANCE 73 29 53 63 39 66 29 62 22 33 16 99 13 05 10 10 7 88 6 19 4 91 3 91 3 14 2 54 2 07 1 69 1 39 VOLTAGE 4 09 V 3 84 V 3 55 V 3 23 V 2 89 V 2 56 V 2 23 V 1 92 V 1 63 V 1 38 V 1 16 V 0 97 V 0 81 V 0 67 V 0 56 V 0 47 V 0 39 V ...

Page 47: ...23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C 68 F 20 C 77 F 25 C 86 F 30 C 95 F 35 C 104 F 40 C RESISTANCE 225 1 169 8 129 3 99 30 76 96 60 13 47 34 37 55 30 24 13 19 53 15 91 13 03 10 74 8 89 7 40 6 20 VOLTAGE 4 48 V 4 33 V 4 16 V 3 95 V 3 734 V 3 487 V 3 22 V 2 95 V 2 67 V 2 40 V 2 14 V 1 89 V 1 64 V 1 45 V 1 27 V 1 10 V 0 96 V ...

Page 48: ...lfunction this process is repeated 3 times If the fan motor is determined to be defective an error code will be shown in the display for 30 minutes At this point the process will be repeated until the fan motor operates normally If normal operation is achieved the error display disappears and the MICOM is resets automatically No signal Error Display 15s 10s 15s 10s 15s Normal drive No signal Repea...

Page 49: ...et a ohmmeter to the 2 housing pin Measure the 2 pin connected to Fuse M If the ohmmeter indicate below 0 1ohm fuse m is a good condition But if infinite the part is bad How to Measure Sensor Set a ohmmeter to The 2housing pin Measure the 2 pin connected to Sensor If the ohmmeter indicate 11 at room temperature Sensor is good When check the ohm at other temperatures Check the sensor manual Standar...

Page 50: ... when we check the resistance How to Measure Set a ohmmeter connect to The housing pins Measure the pins connected to Sheath Heater If the ohmmeter indicates V øV Watt R is on a good condition ex watt 350W voltage 115V R 115 ø115 350 38 Infinitive value implies sheath heater is disconnected Standard Sheath heater at all temperature Test Point 1 to 2 Ressult 41 8 46 2 1 2 ...

Page 51: ...ot when we check the resistance How to Measure Set a ohmmeter connect to The housing pins Measure the pins connected to Sheath Heater If the ohmmeter indicates V øV Watt R is on a good condition ex watt 350W voltage 115V R 115 ø115 350 38 Infinitive value implies sheath heater is disconnected Standard Sheath heater at all temperature Test Point 1 to 2 Ressult 78 6 86 8 1 2 ...

Page 52: ...ct operate on and off moving plunger of door switch up and down How to Measure Switch Freezer Switch Refrigerator Check the resistance between connectors 1 2 and 3 4 It means check whether or not applying an electric current If there is resistance the switch is good Standard Beep Beep Multimeter beep Switch F R Nomal Beep or 0 Push the button Plunger None Button Plunger 1 2 3 4 3 4 2 1 1 2 3 4 ...

Page 53: ... DC Motor Function Dispenser DC Motor When customer push the dispenser button Pull duct door and abstract from ice bank How to Measure Standard Dispensor DC Motor Dispenser DC Motor Test Points 1 to 2 Result 9 9 12 1 1 2 ...

Page 54: ...Solenoid Test Points 1 to 3 Result 31 1 42 09 Separate the housing Measure the resistance between 1 and 2 Check the resistance between connectors In door motor 1 2 and In door motor 1 3 It means check whether or not applying an Electric current If there is resistance it means the geared motor or solenoid is not inferiority 1 2 3 1 1 2 Separate the housing Measure the resistance between 1 and 3 1 2...

Page 55: ... the damper is closed the chill rooms temperature will rise How to Measure Damper Circuit extension Check the Standard Damper Test Points Red and Yellow Result 373 456 Test Points Blue and White Result 373 456 Check to see if there is electrical current if there is resistance the damper is good 1 Blue 1 Blue 2 Red 3 White 3 White 1 3 Check the 2 4 Check the 1 3 3 Yellow ...

Page 56: ...r lamp assembly The lamp socket supply electric source to lamp also How to Measure Standard Check the resistance between connector of housing and connector of lamp socket It means check whether or not applying an electric current If there is resistance it means the lamp socket is good Test Points 1 to 2 and 3 to 4 Result 0 1 2 3 4 ...

Page 57: ...Sensor Function Flow Sensor in machine room Count the water quantity from city water to water filter in refrigerator How to Measure Standard Flow Sensor in machine room Test Points Red wire to Black wire Result 4 30 ...

Page 58: ...D blink6 Reset Reset Reset Reset LED blink 1 LED blink 7 Replace Driver PCB Comp Check Replace Driver PCB LED blink 5 LED blink2 Heavy Repair Heavy Repair Comp Work Comp Check Replace Comp Comp Work Comp Check Harness Check Leakage Recheck Reset LED blink6 Heavy Repair Heavy Repair Recheck Replace Driver PCB Comp Work Comp Check Refrigerant leak IPM output 80V 20 Refrigerant leak Recheck Fix Harne...

Page 59: ...ed in the PCB case The control driver is PC board for the compressor This step shows the source voltage of the driver PC board Driver PCB located in back plate cover behind the refrigerator Step1 Open PCB Cover Step2 Check Driver PCB LED Lamp ...

Page 60: ...e from IPM In order to determine whether the compressor is operating normally check the output voltage during the refrigeration cycle After initial power up when the compressor begins to operate wait 10 minutes before checking The compressor is operating normally if the voltage is greater than 80V IPM Output check A Inverter Multi Tester ...

Page 61: ... B2 Compressor Doesn t work Y N Compressor Works Intermittently Capacitor Spec Check C Compressor Damage Check C Replace Capacitor Replace Compressor N N Reset Power Stroke Trip Occur Y Repeat Check Procedure Harness Connecting Check C Fix Harness N N Cycle Check E Fix Cycle Replace Driver PCB OK NG Purpose Prevent abnormally long piston strokes Case 1 If compressor doesn t work and LED blinks Cau...

Page 62: ... off and tries to restart within 2 5 minutes B4 LED blinks six times then repeats Current Trip A E Inverters Blink Blink Blink Blink Blink Blink OFF Protection logic Check B Blink 6 time Current Trip Check B4 Compressor Intermittently works Y Capacitor Spec Check C2 Compressor Damage Check C3 Replace Capacitor Replace Compressor NG NG Reset Power Y Current trip Occur Y Repeat Check Procedure IPM C...

Page 63: ...ssor Doesn t work Y N Repeat Check Procedure Replace Drive PCB N Y Check IPM visual inspection turn off Short Test Point A Power Reset Compressor Damage Check C3 Replace Compressor NG Y Modify 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 A ...

Page 64: ...t B 6 8ohm Resistance at Point D 6 8ohm Replace Compressor Problem B D Check wiring to compressor Y N N Y Y Y N N Check Compressor terminals Harness Problem Y N Y Measure the resistance at each point except point C Dead short check measure the resistance between power line in compressor and earth ground in refrigerator Inf Ohm Dead short check P C Resistance FLA075LANA Co Po N C μ Po Power Co Comm...

Page 65: ...ow out with the refrigerant at leak point Temp of compressor and discharge line is normal to slightly higher High side pressure is normal to slightly higher than normal conditions This is because condenser cannot condense the air that is trapped in the condenser The high side pressure and temperature will not mimic the low side pressures and temperatures Over charging Refrigerant Low side Refriger...

Page 66: ...ING HIGH VOLTAGE Step 1 Open PCB cover Step 2 Check for blinking frequency of LED and PCB 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 LED Lamp ...

Page 67: ...r the second action replace compressor Circuit over current error Or cycle error 1 After resetting power check if it is running normal 2 If the same symptom arises after the first action 3 If the same symptom arises after the second action replace compressor PCB parts defect IPM 1 After resetting power check if it is running normal 2 If the same symptom arises after the first action replace PCB 1 ...

Page 68: ...rly Seal liquid foods with wrap Put in foods after they have cooled down Don t open the door too often and close it firmly Condensation forms in the Exterior Case Check if the ambient temperature and humidity of the surrounding air are high Is there a gap in the door gasket Wipe moisture with a dry cloth It will disappear in low temperature and humidity Fill up the gap There is abnormal noise Is t...

Page 69: ...ing of the Refrigerant MOISTURE CLOG Cooling operation stops periodically Flowing sound of refrigerant is not heard and frost melts Lower than ambient temperature Cooling operation restarts when heating the inlet of the capillary tube CLOGGED BY DUST COMP RESSION Freezer and Refrigerator don t cool Low flowing sound of refrigerant is heard and frost forms in inlet only A little higher than ambient...

Page 70: ...Test Very Slow None Equalization Test Very Fast Fast Very Fast Inefficient Compressor Partial Restriction Complete Restriction Condenser Temperature Cap Tube Sound Yes No Air Low Side Leak Loss of Change Very Slow Faint Hotter than Normal None to Weak Room Temperature Compressor Not Pumping Trace of Oil Undercharge The equalization test is trying to restart a compressor using a start kit after it ...

Page 71: ...ply water to the ice tray by operating the solenoid valve To force water to supply to the ice tray or check icemaker s condition press and hold the FILL Key for about 3seconds In the test mode The icemaker will run through 3 stages step by step Harvest Fill water Ice making To reset the icemaker s operation set the power switch OFF position and back it to ON position Icemaker Unit Power Switch Ice...

Page 72: ... passed to make one series of ices after water comes into icemaker Test Mode should not be carried out before checking below 13 2 3 Fill Park Position Once the normal harvest mode has been completed the water solenoid will be activated Not making ice Water Yes Yes No No No Temperature Time Is Icemaker s tray filled with water or Ice Is measured temperature below 10 F in the icemaker compartment Ho...

Page 73: ...agnosed Follow the procedure step by step to check to see if icemaker and Ice detecting sensor is working normally 1st STEP Icemaker Unit Diagnosis Press the fill key for about 3sec If the icemaker runs 2 stages of harvest and filling water step by step It means icemaker s mechanism is normal Caution Be sure that the ice tray is not filled with water before pressing fill key Icemaker Unit Fill Key...

Page 74: ...arm air could get into the compartment and make ices get stuck Replace the cap duct with new one In door geared motor doesn t work Resolution Change the in door geared motor and test it The water comes out of fill cup and the water get into the ice bin Resolution The water pressure from shutoff valve is too high Recommend to use regulator to the customer and close the shutoff valve slightly Clogge...

Page 75: ... 14 1 2 How to Toggle the Display between F C 1 The initial setting is F and the display temperature mode can be changed from F to C or C to F by pressing and holding the FRZ TEMP and the REF TEMP keys at the same time for over 5 seconds 14 1 3 Lock function dispenser and display button lock 5 If you don t hold the Alarm Lock button more than 3 seconds Alarm function will be changed and alarm for ...

Page 76: ...ication 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 14 1 6 Dispenser use selection You can select water or ice by separated pad switch When you press ice type button ice type will be changed Crush or Cube Hold your c...

Page 77: ...he display mode and cancel it 1 With the refrigerator door open keep pressing the Refrigerator Temp Button and ICE PLUS Button more than 5 seconds then it goes to the display mode with Special Beep Sound With Special Beep Sound 2 Perform the same way again to cancel the display mode 3 All Freezing unit will be turned off at display mode Exceptions Lamp Display 14 1 7 CONTROL OF FREEZER FAN MOTOR 1...

Page 78: ...ly start upon the selected Auto Pantry temperature control 2 You can adjust the Pantry control with three different temperature ranges by pressing the Temp Selector button 14 1 14 Defect Diagnosis Function 1 Automatic diagnosis makes servicing the refrigerator easy 2 When a defect occurs the buttons will not operate but the tones such as ding will sound 3 When the defect CODE removes the sign it r...

Page 79: ... 610B 405C 405F 407A 315A 106A 106A 313A 411A 500A 410J S02 S11 S11 406D B01 610D 402A S04 207A 402A B02 249C 262B S14 302B 400A 408A 302C 401A 408B 310B 306A 300A 314A 317A 318A 301A 308B 403B 312C 312D 262H 404A S14 410G 624C 624G 626A 603C 603E 624E 500P 105A 619D 105D 409F 405J 405K 406B 249D S10 145B 271D 315C 315B 315C 315B 103B 103A 610F 610C 145A 120B 120A 282G 405L 405G 404C 405E 405I 327...

Page 80: ...FREEZER PARTS CAUTION Use the part number to order part not the position number 136B 145C 145F 132P 237C 136A 131A 133C 133B 136C 243J 243J ...

Page 81: ...TOR PARTS CAUTION Use the part number to order part not the position number 142D 142A 142B 143A 141F 141B 141H 141A 141F 141B 141H 141A 141F 141B 141H 141A 162A 161A 151A 161C 146E 145D 162B 151B 161B 154A 141D ...

Page 82: ... 243C 241E 241C 241A 241B 619B 243D 243A 262E 262C 243B 262C 615A 233B 231B B06 B06 244A B06 244A 231A 233A 212G B06 235A 203A 200A 201A 249K 250A 253A 249J 250B S05 249F 250B 619C 249E 241L 241K 241K 241K 312B 241E 624A 405M 409I 405M 409I S05 B06 212D B06 206L 206K 205E 630G ...

Page 83: ...DISPENSER PARTS CAUTION Use the part number to order part not the position number 279B 276A 276B 405A 281A 500C 501A 279C 279A 276F 276G 276I 278C 501D 279L 278D 279K 275A 402E 402C ...

Page 84: ...VALVE WATER TUBE PARTS CAUTION Use the part number to order part not the position number 617A 625A 616G 623B 616J 616G 623B 616J 603C S04 627B S04 627A S04 603B 619A ...

Page 85: ...ICE MAKER ICE BIN PARTS CAUTION Use the part number to order part not the position number 600A 630F 630B 630A 630H 630G 630C 630Q 630E 630D 611A 612A 606A 630J 630J 607A ...

Page 86: ...P No MFL62188080 JUL 2013 Printed in Korea ...

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