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LG LFX28979 SERIES, Service Manual

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LG LFX28979 SERIES Service Manual Download Page 35

- 35 -

<CON2>

9-3 Water mode doesn’t work

No

1

2

Checking flow

Check the loose connection on the
Dispenser PCB

Check the Purple to White on the Dispenser
PCB (While pushing the Water Button)

Result & SVC Action

Pushing

Not

pushing

112 ~ 115 V

Other

0 ~2 V

Other

Go to the 3

Dispenser PCB

Go to the 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 ~ 420

Other

360 ~ 420

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

Other

Go to the 4

Dispenser PCB

Go to the 4

Dispenser PCB

Water Button

Result

SVC Action

Summary of Contents for LFX28979 SERIES

Page 1: ...CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LFX28979 COLOR STAINLESS ST WESTERN BLACK WB SUPER WHITE SW REFRIGERATOR SERVICE MANUAL ...

Page 2: ...D 15 FAN AND FAN MOTOR DISASSEMBLY METHOD 15 DRAWER REMOVAL 16 4 ADJUSTMENT 17 5 CIRCUIT DIAGRAM 18 6 TROUBLESHOOTING 19 7 PCB PICTURE 20 21 8 Troubleshooting With Error Display 22 30 9 Troubleshooting Without Error Display 31 39 10 Reference 40 43 11 COMPONENT TESTING INFORMATION 44 52 12 COMPRESSOR TROUBLESHOOTING 53 64 13 ICEMAKER OPEARTING AND TROUBLE SHOOTING METHOD 65 68 14 DESCRIPTION OF FU...

Page 3: ...BLE TRAY COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE ITEMS Clear Drawer Type Linear Fin Tube Type Spiral Condenser R 134a 140 g ISO10 280 ml SHEATH HEATER LED Module 24 Bulb Lamp 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 Wid...

Page 4: ...age Bin Used to preserve chilled food drinks Durabase Divider Ice Bin Auto Icemaker Fixed Door Bins Dairy Product Bin Modular Door Bins Pullout Drawer Durabase Refrigerator Shelves The shelves in your refrigerator are adjustable to meet your individual storage needs Refrigerator Interior Key Parts and Components ...

Page 5: ...tically when it is open at an angle of less than 30 Mullion Folds in when the left door is opened Smart Diagnosis Speaker Hold your phone to this speaker when activating Smart Diagnosis Refer to the Smart Diagnosis section for more details Special Features Crispers Controls humidity and helps vegetables and fruit to stay crisp Glide N Serve Allows you to store food items at a different temperature...

Page 6: ... 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 clockwise Lif...

Page 7: ...n 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 mullion into the channel Insert the cover assembly into bracket door Mullion Replacement 1 Connect wire harness 3 Assemble 2 screws Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 ...

Page 8: ...fter cutting the Tie Wrap Figure 13 Figure 12 Figure 13 GRILLE ASSEMBLY DEFROST CONTROL ASSEMBLY 3 3 Door Alignment If the space between the door are uneven follow the instructions to align them Remove the Base Grillie Turn the leveling legs counter clock wise to raise or clock wise to lower the height of the front of the refrigerator by using flat blade screw driver or 11 32 wrench Use the wrench...

Page 9: ... lead wire on the bottom position Figure 19 Figure 14 Figure 15 3 6 LAMP Unplug or disconnect power at the circuit breaker If necessary remove top shelf or shelves 1 Release 2 screws 2 Hold both ends and pull down to remove 3 6 1 Refrigerator Compartment Lamp Figure 16 4 Use a flat tool as shown below to remove the lamp cover Figure 17 5 To remove the LED assembly pull apart the cover Cover lamp C...

Page 10: ... 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 dispenser Case PCB Button Lever Display PCB Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 30 Figure 28 Case PCB Display PCB Figure 29 Figure 28 2 Use these 2 holes to pull out the bottom 3 If nozzle is interfer...

Page 11: ...Door with the other hand 3 12 WATER BUTTON ASSMEBLY 1 Remove screws 2 Grasp the Button assembly and lift Button Lever hinge 3 14 ICEMAKER REPLACEMENT 1 Remove 4 screws as shown 2 Grasp the bottom of motor cover assembly and pull slowly 3 Disconnect wire harness from wall of compartment In door motor Figure 31 Figure 32 Figure 35 Figure 33 Figure 34 ...

Page 12: ...osition 2 Unscrew 3 screws to disassemble the motor 4 Insert 2 screws 5 Push housing aside 3 15 SUB PWB FOR WORKING DISPENSER 1 Disconnect the wire harness 2 Remove 1 screw from PWB and replace with new PWB CAUTION Make sure that the motor housing is taped to the mold if not positioned correctly the cover will not fit properly Figure 36 Figure 37 Figure 38 Figure 43 Figure 42 Figure 41 Figure 40 F...

Page 13: ... handles as shown 2 Tilt and lift slightly as shown 3 18 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 Figure 44 Figure 45 Figure 46 Figure 47 ...

Page 14: ...from the guide rails one from each side 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 Step 5 Remove only 1 screw of gearice and disassemble the bar and gearice ...

Page 15: ... 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 gear ice with screw Push ...

Page 16: ...ollet to separate the tube from the connector Note there maybe some water in the line Mechanical Cover Housing MOTOR COVER 2 Separate the Fan Assembly and Motor turn counter clockwise to remove from the motor shaft FAN ASSEMBLY MOTOR Assemble in reverse order Taking care to avoid 1 Do not to bend the tube during assembly 2 Press the Water Dispenser button letting water pour out this checks for any...

Page 17: ...7 3 22 Drawer Removal Fully extend the drawer and lift from the front pulling straight out To install the drawer back into the frame tilt the front sightly and pushingt back into place Figure 66 Figure 67 ...

Page 18: ...For every 416 7us check whether FO signal is LOW The trip occurs if it is found three times during the five periods 83ms 4 ADJUSTMENT 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 carefu...

Page 19: ... 19 5 CIRCUIT DIAGRAM LFX28978 ...

Page 20: ... 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 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 pressure or flow meter connection 11 Abnormality of BLDC FAN Motor for Ice Making Er ...

Page 21: ...r shelf Ice maker Icing sensor Ice maker sensor Check each sonsor at it s connector 17 Freezer Shelf Ice maker kit defect Er IU Other Electric system error such as motor gear Hall IC operation circuit with in freezer shelf I M kit When the ice does not drop even when the freezer shelf I M Test S W is pressed Freezer Temperature Error code Refrigerator Temperature Error code ...

Page 22: ... 22 7 PCB PICTURE 7 1 Main PCB P No MFG EBR73304216 2011 06 Picture CON1 CON201 CON5 CON6 CON7 LFX28979 CON4 ...

Page 23: ... 23 7 2 Display PCB Sub PCB P No Display PCB EBR65749303 2011 05 Sub PCB EBR60070707 2010 02 Picture CON2 CON103 CON102 CON101 CON1 CON3 CON2 CON1 CON3 ...

Page 24: ...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 25: ...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 26: ...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 27: ...rost Sensor Error Er 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 28: ... 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 29: ...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 30: ...w While an error code is displayed the fan is not working 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 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 CON7 1 Pin1 2 Pin3 3 Pin5 ...

Page 31: ...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 32: ...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 33: ...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 34: ...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 35: ...e 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 4 360 420 Other 360 420 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 Oth...

Page 36: ...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 37: ...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 38: ...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 39: ... working 1 Mode 2 Mode 1 2 mode Damper is normal Go to 6 Change the damper Test Mode Damper State SVC Action 1 to 2 3 to 4 270 330Ω Other 270 330Ω Other It s normal Change damper It s normal Change damper Point Result SVC Action Below 12 V 0 or 5 V 1 2 2 3 Change the PCB Change the motor Point Result SVC Action Sticky Not Sticky Motor Change the motor Go to 7 Point Result SVC Action CON6 1 Pin1 2 ...

Page 40: ...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 41: ...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 42: ...g TPA 1 How to enter the TEST MODE Push the test button on the Main PCB to enter the TEST MODE 2 How to remove Terminal Position Assurance TPA 1 time Comp Damper All FAN on Everything is displayed 2 times Damper closed 22 22 displayed 3 times Forced defrost mode 33 33 displayed Main PWB AC TPA DC TPA ...

Page 43: ...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 44: ... 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 45: ... 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 30 minutes 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 Norma...

Page 46: ...t 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 Standard...

Page 47: ...esistance 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 if the ohm meter indicate infinity the Sheath heater is bad Standard Sheath heater at all temperature Test Point 1 to 2 Ressult 34 42Ω 1 2 ...

Page 48: ... 48 11 3 Door Heater Assembly Function The heater is designed to prevent the door from sweating How to Measure Standard Test Point 1 to 2 Ressult 2 3 2 9Ω 1 2 3 5 8 9 4 6 7 ...

Page 49: ... 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 0Ω Push the button Plunger None Ω Button Plunger 1 2 3 4 3 4 2 1 1 2 3 4 ...

Page 50: ...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 51: ...Solenoid Test Points 1 to 3 Result 31 1 42 09Ω 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 ...

Page 52: ...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 456Ω Test Points Blue and White Result 373 456Ω 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 53: ... 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 0Ω 1 2 3 4 ...

Page 54: ...ensor 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 kΩ ...

Page 55: ...ink2 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 Fi...

Page 56: ... 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 57: ...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 58: ... 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 59: ...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 60: ...lace 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 FC150NAMA Dead short check P C Multi Tester Resistance FC75LBNA Co Po N C Capacitor Spec 450V 18μ F 5 Po Power Co ...

Page 61: ...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 62: ...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 63: ...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 64: ...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 65: ...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 66: ...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 67: ... Supply 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...

Page 68: ... 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 69: ...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 70: ...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 71: ...ce by rotating ice ejection motor in normal and reverse direction and eject ice into the ice bucket if ice bucket is not full Conduct Ice Making Control after supplying water into the ice maker cube mould by operating water valve This is for refrigerator assembly line and service When ice making test switch is pressed it operates in the following steps initial ice ejection water supply control ste...

Page 72: ...jection control is completed and ice maker mould is even 2 The quantity of water supplied is determined by DIP switch and time 3 If water supply quantity setting is changed while power is on water supplies for the amended time If DIP switch is changed during water supply water shall be supplied for the previous setting time But it will supply for the amended time from the next supply 4 When water ...

Page 73: ...al direction If there is no change in Hall IC signals within 1 minute after ice ejection motor operates ice ejection motor stops as ice ejection motor or hall IC is out of order 5 If ice ejection motor or Hall IC is abnormal ice ejection motor rotates in normal direction to exercise initial operation It resets the ice maker if ice ejection motor or Hall IC is normal 6 The mould stops for 1 second ...

Page 74: ...mould conditions Water shall be splashed if test switch is pressed before the water in the mould freezes Water shall be supplied while the mould returns to the horizontal conditions after ice ejection Therefore the problems of ice ejection returning to the horizontal conditions and water supply can be checked by test switch When test function performs normally buzzer sounds and water supply shall ...

Page 75: ...405F 407A 103C 315A 315C 315B 106A 106A 313A 410G 411A 500A 410J 271D 145B 406D 610D 402A 207A 503F 315B 315C 120B 249C 262B 262H 249D 310B 312A 300A 314A 317A 318A 309B 329C 323B 319A 319C 420A 312C 303A 304A 303C 302B 400A 408A 406B 404A 405J 624A 624C 624G 626A 603C 603E 624E 207B 402A 409B 105A 105D 146G CASE PARTS CAUTION Use the part number to order part not the position number ...

Page 76: ...133B 131A 133B 145F 133B 136B 237C 136A 133A 132P 145C 136C FREEZER PARTS CAUTION Use the part number to order part not the position number ...

Page 77: ...41A 141C 141B 141A 141C 141B 141A 141C 141B 161B 151B 161C 146E 141D 154A 162B 145D 162A 161A 151A 151C 141A 141C 141B REFRIGERATOR PARTS CAUTION Use the part number to order part not the position number ...

Page 78: ...06 243D 243A 262E 244A 241C 241A 241B 233A 231A 212G B06 203A B06 250F 250K 212D B06 619B 603B 603C 200A 262C 262C 249K 250A 253A 249J 250B 249F 250B 249E 615A 312B 241K 241K 201A 267A DOOR PARTS CAUTION Use the part number to order part not the position number ...

Page 79: ...279B 276A 276B 405A 279I 279H 279J 402C 281A 279D 500C 279E 501A 279A 279C 281B 275A 276F 276G 501D 278C 278D DISPENSER PARTS CAUTION Use the part number to order part not the position number ...

Page 80: ...617A 623B 616D 623B 603C 616F 603B 625A 616G 616J 616R 616E 623A 616S 619A 627A 619E 616J 627B VALVE WATER TUBE PARTS CAUTION Use the part number to order part not the position number ...

Page 81: ...ICE MAKER ICE BIN PARTS CAUTION Use the part number to order part not the position number Ice Room Freezer Room 600A 630F 630B 630A 630H 630G 630C 630Q 630E 630D 611A 612A 630J 606A 630J 607A 600B 600F ...

Page 82: ...China n i d e t n i r P 2 1 0 2 E N U J ...

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