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LG LFX25974 Series, Service Manual

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CONTENTS

- 2 -

1. SPECIFICATIONS .............................................................................................................................................................. 3
2. PARTS IDENTIFICATION .................................................................................................................................................. 4
3. DISASSEMBLY ............................................................................................................................................................. 5-17

REMOVING AND REPLACING REFRIGERATOR DOORS ............................................................................................... 5
DOOR .................................................................................................................................................................................. 6
DOOR ALIGNMENT  ........................................................................................................................................................... 7
FAN AND FAN MOTOR(EVAPORATOR)  .......................................................................................................................... 7
DEFROST CONTROL ASSEMBLY  .................................................................................................................................... 7
LAMP .................................................................................................................................................................................. 8
MULTI DUCT  ...................................................................................................................................................................... 8
MAIN PWB ........................................................................................................................................................................... 8
DISPENSER ....................................................................................................................................................................... 9
DISPLAY PCB ..................................................................................................................................................................... 9
ICE BUTTON ASSEMBLY  .................................................................................................................................................. 9

WATER BUTTON ASSMEBLY ........................................................................................................................ 9
ICE COMPARTMENT DOOR REPLACEMENT  .............................................................................................. 9
ICEMAKER REPLACEMENT  ........................................................................................................................ 10
SUB PWB FOR WORKING DISPENSER  ..................................................................................................... 10
CAP DUCT MOTOR REPLACEMENT  .......................................................................................................... 11
HOW TO REMOVE THE ICE BIN  ................................................................................................................. 12
HOW TO INSERT THE ICE BIN .................................................................................................................... 12
HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER ................................................................ 13
WATER VALVE DISASSEMBLY METHOD  .................................................................................................. 15
BOTTOM DRAWER ....................................................................................................................................... 16

4. ADJUSTMENT .................................................................................................................................................................. 17

COMPRESSOR ................................................................................................................................................................ 17

5. CIRCUIT DIAGRAM  ......................................................................................................................................................... 18
6. TROUBLESHOOTING ...................................................................................................................................................... 19

ERROR CODE SUMMARY  .............................................................................................................................................. 19

7. PCB PICTURE ............................................................................................................................................................. 20-21

MAIN PCB ......................................................................................................................................................................... 20

DISPLAY PCB & SUB PCB   .......................................................................................................................... 21

8. TROUBLESHOOTING WITH ERROR DISPLAY  .................................................................................... 22-30

9. TROUBLESHOOTING WITH ERROR DISPLAY ........................................................................................................ 31-39
10. REFERENCE ............................................................................................................................................................. 40-43
11. COMPONENT TESTING INFORMATION  ................................................................................................................ 44-52
12. COMPRESSOR TROUBLESHOOTING  ................................................................................................................... 53-64
13. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER  ....................................................................... 65-66

ICEMAKER’S BASIC OPERATING METHOD  ............................................................................................................... 65
ICE MAKER FUNCTIONS  .............................................................................................................................................. 66
TROUBLE SHOOTING ICE & WATER SYSTEM ISSUES  ............................................................................................ 66

14. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM  ............................................................................................... 69

FUNCTION ................................................................................................................................................................ 69-72

15. EXPLODED VIEW ......................................................................................................................................................... 1-7

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 LFX25974 Series

Page 1: ...REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LFX25974 COLOR STAINLESS ST WESTERN BLACK SUPER WHITE ...

Page 2: ...ERROR CODE SUMMARY 19 7 PCB PICTURE 20 21 MAIN PCB 20 DISPLAY PCB SUB PCB 21 8 TROUBLESHOOTING WITH ERROR DISPLAY 22 30 9 TROUBLESHOOTING WITH ERROR DISPLAY 31 39 10 REFERENCE 40 43 11 COMPONENT TESTING INFORMATION 44 52 12 COMPRESSOR TROUBLESHOOTING 53 64 13 OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 65 66 ICEMAKER S BASIC OPERATING METHOD 65 ICE MAKER FUNCTIONS 66 TROUBLE SHOOTING ICE WAT...

Page 3: ...tomatic Heater Defrost PCM Stainless Bar ABS Resin Polyurethane Foam DOOR DESIGN DIMENSIONS inches NET WEIGHT pounds COOLING SYSTEM TEMPERATURE CONTROL DEFROSTING SYSTEM DOOR FINISH HANDLE TYPE INNER CASE INSULATION ITEMS SPECIFICATIONS Description LMX25986 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 Width door...

Page 4: ...rigerator compartment shelves are adjustable to allow flexibility for storage needs 1 GALLON STORAGE BINS Two interchangeable bins can be arranged to suit your storage needs 2 LED INTERIOR LAMPS Refrigerator interior is lit by the LED array 3 CAN STORAGE BIN 4 FIXED DOOR BINS 5 ...

Page 5: ...kwise Lift top hinge 7 free of hinge lever latch 8 CAUTION When lifting hinge free of latch be careful that door does not fall forward 7 Place door inside facing up down onto a non scratching surface Right Door FIG 3 1 Open door Loosen top hinge cover screw 1 Lift up cover 2 2 Disconnect door switch wire harness Remove cover 3 Rotate hinge lever 3 clockwise Lift top hinge 4 free of hinge lever lat...

Page 6: ... screws Door Gasket Removal 2 Lift pillar up carefully 3 Disconnect wire harness Door Gasket Replacement 1 Insert gasket into channel Press gasket into channels on the four remaining sides of door 2 Insert pillar into channel Inserting pillar assy into bracket door Pillar Replacement 1 Connect wire harness 3 Assemble 2 screws ...

Page 7: ...separate the Fan Motor and Bracket BRACKET MOTOR Ice fan assembly GRILLE FAN FAN MOTOR Ice Fan Scroll Assembly Replacement 1 Remove the plastic guide for slides on left side by unscrewing phillips head screws 2 Pull the grille forward as shown in the second picture 3 Disconnect wire harness of the grille 4 Remove the scroll assembly by loosening all screws 3 4 3 5 DEFROST CONTROL ASSEMBLY Defrost ...

Page 8: ...Lamp 1 Unplug refrigerator power cord from outlet 2 Remove screw with driver 3 Grasp the cover Lamp pull the cover downward 3 6 2 Freezer Compartment Lamp 4 As shown below use a flat tool to remove the cover lamp 3 7 MULTI DUCT 1 Remove the upper and lower Caps by using a flat screwdriver and remove 2 screws Figure 6 2 Disconnect the lead wire on the bottom position 3 8 MAIN PWB 1 Loosen 3 screws ...

Page 9: ...f removal be careful that the lead wire does not come out and the water tube is not pinched by the dispensor Case PCB Display PCB 3 11 ICE BUTTON ASSEMBLY 1 Remove the screw fixing the button lever 2 Push the spring from the hanging hook to remove it 3 Apply some pressure to the rib in direction and lift the button in direction Button Lever 3 13 ICE COMPARTMENT DOOR REPLACEMENT 1 Loosen the front ...

Page 10: ...re harness from wall of compartment In door motor Caution Check to see if the housing is stuck to mold and taped If the housing is not on its original position it will disturb Cover motor to be positioned to the unit 3 15 SUB PWB FOR WORKING DISPENSER 1 Disconnect the wire harness 2 Loosen the screw on the sub PWB and replace the sub PWB in the reverse order of removal ...

Page 11: ...ng of the Cap Duct Motor 3 When replacing to a new Motor always check position of the Duct Door and Link to install the Motor Link Duct Door Cap Duct Motor NG Position 2 Unscrew 3 screws to disassemble the motor 4 Assemble on the screws 5 Connect the Housing ...

Page 12: ... Grip the handles as shown in the picture 2 Lift the lower part slightly 3 18 HOW TO INSERT THE ICE BIN 1 Insert the Ice Bin slightly tilting it to avoid touching the Icemaker Especially Ice Detecting Sensor 3 Take the Ice Bin out slowly ...

Page 13: ...rom the guide rails one from each side Step 5 Remove only 1 screw of gear ice and disassemble the bar and gear ice Step 2 Remove the lower basket Step 4 Removal of the freezer door is done by lifting clear of the rail support Fully extend both rails Step 6 Remove 2 screws of both side of supporter covers tv and disassemble the supporter cover tv ...

Page 14: ...hem Step 6 Reinstall the freezer door by inserting the rail tabs into the guide rail Step 8 Reinstall the lower basket and close the freezer door Step 5 The rail system will align itself by pushing the rails all 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 2 Assemble a bar and Push the others...

Page 15: ...ut the Cilp Then press the collet to separate the tube from the connector and pour out the water until emptied Cover Back M C Housing MOTOR COVER 2 Pull and separate the FAN ASSEMBLY and MOTOR turning counterclockwise based on the MOTOR SHAFT The assembly is in the reverse order of the disassembly and take special care for the following details 1 Be careful not to bend the tube during assembly 2 P...

Page 16: ... 16 3 22 FREEZER 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 17: ...d from IPM is LOW For every 416 7 check whether FO signal is LOW The trip occurs if it is found three times during the five periods 83ms 4 1 1 Role 4 1 COMPRESSOR The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high temperature and high pressure gas It then delivers the gas to the condenser 4 1 2 Note for Usage 1 Be car...

Page 18: ... 18 5 CIRCUIT DIAGRAM ...

Page 19: ...AIN Jam Poor Relay for Heater 8 Ice maker kit defect Er It Other Electric system error such as moter gear Hall IC operation circuit within I M kit When the ice does not drop even when the I M Test S W is pressed same as model applied Twisting Ice Maker before 9 Flow Meter Sensor Defect Er gF Error of flow meter or water input or low water pressure Error of flow meter or water input or low water pr...

Page 20: ... 20 7 PCB Picture 7 1 Main PCB P No MFG EBR73304204 2011 05 Picture CON1 CON5 CON7 CON201 CON2 CON3 ...

Page 21: ... 21 7 2 Display PCB Sub PCB P No Display PCB EBR67357902 2011 03 Sub PCB EBR60070707 2011 03 Picture CON103 CON102 CON2 CON101 ...

Page 22: ...C 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 at CON7 on the main PCB Result SVC Action CON7 Temperature table 1 1 To 2 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 The sensor is determined by the temperature For example 23 indicates 4 F ...

Page 23: ...ion 8 2 Refrigerator Sensor Error Er rS No 1 2 Checking flow Check for a loose connection Check the White to White at CON7 on the main PCB Result SVC Action Temperature table 2 1 To 2 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 30 indicates 32 F CON7 ...

Page 24: ...nce 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 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 The sensor is determined by the temperature For example 23 indicates 4 F CON101 Display CON101 ...

Page 25: ...rost 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 at CON7 on the main PCB CON7 Temperature table 3 1 To 2 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 The sensor is determined by the temperature For example 30 indicates 32 F ...

Page 26: ... Checking flow Check the Door gasket Check the Defrost control part 3 Input Test 3 Mode Push the button 3 times 4 Check the Blue Pin4 to Orange Pin9 at CON3 on the main PCB Result SVC Action Def Heater Fust M Def Sensor 5 Release the test mode push the button 1 times normal CON3 Result 112 116 V 0 V SVC Action Go to the 5 Replace Main PCB 6 Check the Blue Pin4 to Orange Pin9 at CON3 on the main PC...

Page 27: ...ror code is displayed the fan is not working 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 7 V 0 or 5 V 2 3 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 1 Pin8 2 Pin10 3 Pin12 ...

Page 28: ...hort Result SVC Action Status No windy Windy SVC Action Go to the 3 4 Go to the 5 4 Check the Fan motor Frozen Lock ect 5 Check the Fan motor voltage Below 7 V 0 or 5 V 2 3 1 3 Change the PCB Change the motor Point Result SVC Action Duct Asm Connector 5209JA 1044A 407A 5209JA 1044A No Part Name Old P No New P No Wire seal silicon CON7 1 Pin1 2 Pin3 3 Pin5 Tip To protect ice short add wire seal in ...

Page 29: ...r code is displayed the fan is not working 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 Go to the 3 Go to the 4 Below 7 V 0 or 5 V 2 3 1 3 Change the PCB Change the motor Point Result SVC Action CON7 1 Pin2 2 Pin4 3 Pin6 ...

Page 30: ...6 Check the White Red to White Black 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 CON101 Displa...

Page 31: ...ver S W 4 Check the resistance value CON1 CON3 Ice Maker AC Indoor Motor Dispenser Motor 2 1 3 4 Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 3 Dispenser PCB Go to the 3 Dispenser PCB Ice Button Result SVC Action Pushing Not pushing 9 12 V Other 0 2 V Other Go to the 4 Dispenser PCB Go to the 4 Dispenser PCB Ice Button Result SVC Action 1 to 2 3 to 4 31 1 42 1 Ω Other 9 9 12 1 Ω Other...

Page 32: ...e resistance value CON1 CON3 Ice Maker AC Indoor Motor Dispenser Motor 2 1 3 4 Pushing Not pushing 112 115 V Other 0 2 V Other Go to the 3 Dispenser PCB Go to the 3 Dispenser PCB Ice Button Result SVC Action Pushing Not pushing 9 12 V Other 0 2 V Other Go to the 4 Dispenser PCB Go to the 4 Dispenser PCB Ice Button Result SVC Action 1 to 2 3 to 4 31 1 42 1 Ω Other 9 9 12 1 Ω Other Explain Replace A...

Page 33: ... 3 Dispenser PCB Water Button Result SVC Action 3 4 4 Check the resistance value Pilot Valve Machine Room Water Valve In door 1 to 2 3 to 4 360 420Ω Other 360 420Ω Other Explain Replace Pilot Valve Explain Replace Water Valve Point Result SVC Action 1 2 Dispenser Ice Maker CON3 3 Check the Blue to Gray on the Dispenser PCB While pushing the Water Button Pushing Not pushing 112 115 V Other 0 2 V Ot...

Page 34: ...y blue 4 Check the Blue to Black Normal Push S W 0Ω not Infinity Go to the 3 Change door S W Go to the 3 Change door S W Status Result SVC Action Closed Open 0V Other 5V Other Go to the 4 Change the Door S W Go to the 4 Change the Door S W Status Result SVC Action Closed Open 0 2V Other 115V Other Explain to customer Change the Main PCB Change the F Lamp Change the main PCB Status Result SVC Actio...

Page 35: ...ck Closed Open 0 2V Other 12V Other Explain to customer Change the Door S W Explain to customer Change the LED Lamp Status Result SVC Action Normal Push S W 0Ω Other 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 ...

Page 36: ...Sensor is determined by the temperature For example 30 indicates 32 F Result SVC Action Temperature 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 Status Windy No windy SVC Action Go to the 4 Check the F Fan motor Check the Damper Go to the 5 4 Check the air temperature Cold or not Status Cold Not cold SVC Action Explain to customer Check the Compressor And sealed system CO...

Page 37: ...Mode 1 2 mode Closed Open Not working Damper is normal Go to the 7 Change the damper Damper state SVC Action Test Mode 1 To 2 3 To 4 270 330 Ω Other 270 330 Ω Other It s normal Change damper It s normal Change damper Result SVC Action Test Point CON7 1 Pin8 2 Pin10 3 Pin12 Sticky Motor Change the motor Point Result SVC Action 7 Check the F Fan motor voltage Below 7 V 0 or 5 V 2 3 1 3 Change the Ma...

Page 38: ...w The F Sensor is determined by the temperature For example 23 indicate 4 F Result SVC Action Temperature 22 F 30 C 13 F 25 C 4 F 20 C 5 F 15 C 14 F 10 C 23 F 5 C 32 F 0 C Result 40 30 23 17 13 10 8 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 CON...

Page 39: ...sult SVC Action Status Windy No windy SVC Action Go to the 4 Check the R Fan Check the damper Go to the 5 4 Input Test 2 Mode and Check the air flow push the button 1 more time Status Windy No windy SVC Action Go to the 5 It s normal 5 Check the damper resistance CON7 Temperature 23 F 5 C 32 F 0 C 41 F 5 C 50 F 10 C 59 F 15 C Result 38 30 24 19 5 16 1 4 3 2 1 To 2 3 To 4 270 330 Ω Other 270 330 Ω ...

Page 40: ...Assurance 1 How 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 41: ...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 42: ...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 43: ...hat there is a fan motor malfunction this process is repeated 3 times If the fan motor is determined to be defective the error code will be shown in the display for 3hours At this point the process will be repeated until the fan motor operates normally If normal operation is achieved the error display is erased and the MICOM is reset automatically No signal Error Display 15s 10s 15s 10s 15s Normal...

Page 44: ...re Fuse M Set 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 infinitely great ohm Fuse M is disconnection 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 not a defect When check the ohm at other temperat...

Page 45: ... resistance How to Measure Set a ohmmeter connect to The 2 housing pin Measure the 2 pin connected to Sheath Heater If the ohmmeter indicate V øV Watt R is good condition ex when watt 350w voltage 115v R 115 ø115 350 38Ω But the ohmmeter indicate infinitely great Sheath heater is disconnection Standard Sheath heater at all temperature Test Point 1 to 2 Ressult 34 42Ω 1 2 ...

Page 46: ... 46 11 3 Door Heater Assembly Function The heater is designed to prevent the raising dew from door How to Measure Standard Test Point 1 to 2 Ressult 2 3 2 9Ω 1 2 3 5 8 9 4 6 7 ...

Page 47: ... 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 it means the switch not inferiority Standard Beep Beep Multimeter beep Switch F R Nomal Beep or 0Ω Push the button Plunger None Ω Button Plunger 1 2 3 4 3 4 2 1 1 2 ...

Page 48: ...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 1Ω 1 2 ...

Page 49: ...s 1 to 3 Result 20 42Ω Take out the male housing from female 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 Take out the male housing from female housing Measure the res...

Page 50: ...emperature will rise How to Measure Damper Circuit extension Check the Standard Damper Test Points Red and Yellow Result 373 456Ω Test Points Blue and White Result 373 456Ω Check the resistance between connectors 1 3 and 2 4 It means check whether or not applying an electric current If there is resistance it means the damper not inferiority 1 Blue 1 Blue 2 Red 3 White 3 White 1 3 Check the 2 4 Che...

Page 51: ... 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 not inferiority Test Points 1 to 2 and 3 to 4 Result 0Ω 1 2 3 4 ...

Page 52: ...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 53: ...nk2 LED 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...

Page 54: ... 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 Driver PCB located in machine room Step1 Open PCB Cover Step2 Check Driver PCB ...

Page 55: ...roke Trip Check 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...

Page 56: ... 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 57: ...ck B5 Compressor 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 minutes A ...

Page 58: ...m 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 Multi Tester Resistance FC75LBNA Co Po N C Capacitor Spec 450V 18μ F 5 Po Power Co Commo...

Page 59: ...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 60: ...oubleshooting Step 1 Open PWB cover Step 2 Check for blinking frequency of LED PWB 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 ...

Page 61: ...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 62: ...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 63: ...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 64: ...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 65: ...pply 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 Ic...

Page 66: ...s 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 How long has customer waite...

Page 67: ...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 68: ...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 69: ... 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 1 When the refrigerator is first turned on the buttons are not locked LOCK is deactivated with no light on ...

Page 70: ...n again 3 Ice plus function automatically turns off after a fixed time passes 4 If you want additional power save you can turn on energy saving some heater off for anti dew 5 To turn on or off the energy saving function press Ice plus Energy saving Button for more than 3 seconds 6 We recommend using energy saving function when you go out for quite a long time and are out of the rainy season 14 1 6...

Page 71: ...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 72: ...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 73: ... 616J 607A 282F 120A 120B 282G 145A S08 610D 500A 410G 411A 313A 410J S02 271D S10 610A 145B S12 S12 105A 318A 316A 314A 300A 303C 304A 303A 317A 310B 312A 262H 250F 406B B02 S14 249D 249C B02 S14 262B 302B 400A 316B 408A 329A S16 407A 332C 610C S17 103C 315A 315C 315B 405B 405C 404A 405F 407B 106A 106A 315B 315C B01 S11 158A 503D 409D 503E 500P 409B 146G 158B 312C 323B 329C 319A 319C 309B 420A S2...

Page 74: ... 2 FREEZER PARTS CAUTION Use the part number to order part not the position number 145F 133B 136B 136A 133A 145C 136C 237C ...

Page 75: ...RATOR PARTS CAUTION Use the part number to order part not the position number 141C 141C 141C 141B 141E 141A 141B 141E 141A 141B 141E 141A 141B 141C 141E 141A 154A 151B 161A 162A 145D 162B 146E 151A 161C 161B 141D ...

Page 76: ...number 233B 231B 235A B06 B06 243C 244A 243B B06 243A 262E 243E 244A 233A 231A 212G B06 619B 603B 603C 262C 262C 615A 312B 241A 241B 241C 241G 241D 241E 241K 241K 267A 203A 201A 200A 212D 205C 205B B06 B06 250B 250B 249H 249G 249K 249J S25 249E 249F 250A 253A 132P 132P 243D ...

Page 77: ... 5 DISPENSER PARTS CAUTION Use the part number to order part not the position number 279B 276A 276B 405A 279I 279H 279J 402C 281A 279D 500C 279E 501A 279A 279C 281B 275A 276F 276G 501D 278C 278D ...

Page 78: ... 6 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 616D 616D S31 616F 627B S31 619E 627A S31 603B 619A ...

Page 79: ... 7 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 630J 606A 630J 607A ...

Page 80: ...P No MFL48178837 MAY 2011 Printed in Korea ...

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