LG LFXS29626 Service Manual Download Page 56

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Explain to customer

TEST MODE 1

Voltage [V]

CON6
8

pin ~ 12

Not 0V, 5V

Check the Fan Motor voltage

Is Fan Motor voltage 8~12V?

Yes

Replace

Main PCB

TEST MODE 1

Voltage [V]

CON6
10

pin ~ 12

8~12V

Check the Fan Motor voltage

Is Fan Feed Back voltage 0V, 5V?

Change the

motor

Yes

Summary of Contents for LFXS29626

Page 1: ...CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LFXS29626 COLOR STAINLESS ST SMOOTH BLACK SB SUPER WHITE SW REFRIGERATOR SERVICE MANUAL ...

Page 2: ...ETHOD 16 PULL OUT DRAWER 17 4 ADJUSTMENT 18 COMPRESSOR 18 5 CIRCUIT DIAGRAM 19 6 TROUBLESHOOTING 20 7 PCB PICTURE 21 22 8 Troubleshooting With Error Display 23 31 9 Troubleshooting Without Error Display 32 40 10 Reference 41 44 11 COMPONENT TESTING INFORMATION 45 52 12 COMPRESSOR TROUBLESHOOTING 53 65 13 ICEMAKER OPEARTING AND TROUBLE SHOOTING 66 68 14 ICEMAKER Freezer Room OPERATING METHOD AND TR...

Page 3: ...EGETABLE TRAY COMPRESSOR EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE ITEMS Clear Drawer Type Linear Fin Tube Type Spiral Condenser R 134a 145 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 ...

Page 4: ...ightly The door only closes automatically when it is open at an angle of less than 30 C Glide N Serve When you want to store food items at a much lower temperature you can use the temperature controller to maintain the lowest possible chilling temperature without freezing The filter should be replaced every 6 months Please refer to Replacing the filter in this manual for details This function may ...

Page 5: ... 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 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: ... 7 ...

Page 8: ... 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 4 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 refrigera...

Page 9: ...ervice hole and remove cover of refrigerator light 3 7 1 Refrigerator Compartment Lamp 4 Replace the LED assembly 3 Remove the LED assembly from connector 3 7 2 Refrigerator Light Side 1 Unplug refrigerator power cord from electric outlet 2 Put flat screwdriver into sevice hole and remove cover of refrigerator light 3 Remove the LED assembly from connector 4 Replace LED assembly 5 Assemble the cov...

Page 10: ...3 Put flat screwdriver into 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 Grip both side of multi duct pull it out ...

Page 11: ...penser pull forward to remove 3 10 DISPLAY PCB As shown below remove 1 screw on the PCB fixing screw Remove the display PCB fixing screw 3 11 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 12: ...ire harness 2 Remove 1 screw from PCB and replace with new PCB 3 14 Icemaker replacement 1 Remove 3 screws marked in the picture below 2 Grasp the bottom of motor cover assembly and pull it out slowly to remove 3 Disconnect wire harness from wall of compartment ...

Page 13: ...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 14: ...lower part slightly 3 18 HOW TO PLACE ICE BIN IN POSITION 1 Insert the Ice Bin slightly tilting it to avoid touching the Icemaker Especially Ice Detecting Sensor Note Before remove ice bin put on clean golves for keeping clean ice bin Auto shuto feeler arm 3 Take the Ice Bin out slowly ...

Page 15: ...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 16: ...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 17: ... the line Mechanical Cover Housing 3 21 FAN MOTOR ASSEMBLY AND DISASSMEMBLY METHOD 1 Remove screws for the Drain Pipe Assembly and the 1 connected to the Motor Cover 2 Remove the screw from shroud and Separate the Fan motor assembly and Shroud 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 chec...

Page 18: ...nd insert the drawer into the frame and push it back into push it back place 3 23 CAUTION Sealed System Repair Before making a sealed system repair Start with the power cord unplugged from the outlet Plug in the power cord and between 6 and 12 seconds after it has been pugged in unplug it from the power source this will allow both sides of the 3 way valve to be opened to allow for proper evacuatio...

Page 19: ...m IPM is LOW 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 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 20: ... 20 5 CIRCUIT DIAGRAM ...

Page 21: ... Error of flow meter or water input or low water pressure or flow meter connection 15 Abnormality of BLDC FAN Moter for Freezer E FF It is caused when feedback signal isn t over 65 seconds during BLDC FAN motor operating Poor BLDC Motor connection DRIVE IC and TR 9 Room Temp Sensor Error E rt Short or Disconnectoin of Room temp sensor 14 Abnormality of BLDC FAN Moter for Ice Making E IF It is caus...

Page 22: ... 22 P N EBR78940502 P N EBR78940502 7 1 Main PCB 7 2 Display PCB P N EBR79159704 CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON3 CON101 CON102 CON802 CON103 7 PCB Picture ...

Page 23: ... 23 7 3 Sub PCB P N EBR76468401 ...

Page 24: ...esistance Ω CON7 17th pin 18th pin Short 0 Open OFF Other Normal CON7 17th pin 18th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON7 8 1 Freezer Sensor Error Er FS 8 Trouble Shooting ...

Page 25: ... Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes CON7 17th pin 18th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k 6 Explain to customer CO...

Page 26: ... Sensor Resistance Resistance Ω CON7 15h pin 16th pin Short 0 Open OFF Other Normal CON7 15th pin 16th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON7 8 2 Refrigerator Sensor Error Er rS ...

Page 27: ...0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON7 15th pin 16th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 ...

Page 28: ...esistance Resistance Ω CON5 11th pin 12th pin Short 0 Open OFF Other Normal CON5 11th pin 12th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON5 8 3 Icing Sensor Error Er IS ...

Page 29: ...Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON5 11th pin 12th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k CON...

Page 30: ... Resistance Resistance Ω CON7 19th pin 20th pin Short 0 Open OFF Other Normal CON7 19th pin 20th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 DefrostController CON7 8 4 Defrost Sensor Error F dS ...

Page 31: ...tance 0Ω Sensor short Yes No Change the Sensor 3 Check the Sensor resistance Is resistance OFF Sensor open Yes No Replace the refrigerator 4 Check the Sensor resistance Is resistance normal Yes 5 Check the Temperature and resistance refer to the table No problem Yes 6 Explain to customer CON7 19th pin 20th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k CON7 ...

Page 32: ... the PCB output voltage Part Resistance Ω FUSE M 0 Defrost Heater 35 40 Defrost Sensor 22k TEST MODE 3 Voltage V CON3 6th pin 10th pin 112V 116V TEST MODE 1 Voltage V CON3 6th pin 10th pin 0V DefrostController CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON3 8 5 Defrost Heater Error F dH ...

Page 33: ...e M Def Heater 4 Check the Heater Voltage Is voltage 112 116V Yes Def Sensor Def Heater Fuse M 3 Check the Defrost control part Is Defrost Sensor resistance 22kΩ or OFF OFF 22kΩ Replace product Input Test 3 Mode Push the button 3 times Replace Main PCB Yes TEST MODE 3 Voltage V CON3 6h pin 10th pin 112V 116V 5 Check the Heater Voltage Is voltage 0V Yes Input Test 1 Mode Push the button 1 times Rep...

Page 34: ...ON5 CON6 Symptom Check Point 1 Er FF 1 Check the air flow 2 Check the Fan Motor 2 Check the PCB Fan motor voltage TEST MODE 1 Voltage V CON7 10th pin 12th pin 8 12V CON7 8th pin 12th pin Not 0V 5V Fan Motor CON7 8 6 Freezer Fan Error Er FF ...

Page 35: ...voltage Is Fan Motor voltage 8 12V Yes 3 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Replace Main PCB No Reset the unit and Input Test1 Mode Push the button 1 time Go to 4 Fan Motor TEST MODE 1 Voltage V CON7 10hpin 12th pin 8 12V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes 6 Explain to customer ...

Page 36: ...5 CON6 Symptom Check Point 1 Er IF 1 Check the air flow 2 Check the Connector 2 Check the PCB Fan motor voltage TEST MODE 1 Voltage V CON7 3rd pin 5th pin 8 12V CON7 1st pin 5th pin Not 0V 5V Air Flow Connector CON7 8 7 Icing Fan Error Er IF ...

Page 37: ...voltage Is Fan Motor voltage 8 12V Yes 3 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Replace Main PCB No Reset the unit and Input Test1 Mode Push the button 1 time Go to 4 Fan Motor TEST MODE 1 Voltage V CON7 3rd pin 5th pin 8 12V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes 6 Explain to customer ...

Page 38: ...ck the air flow 2 Check the Connector 2 Check the PCB Fan motor voltage TEST MODE 1 Voltage V CON7 4th pin 6th pin 8 12V CON7 2nd pin 6th pin Not 0V 5V Fan Motor CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON7 8 8 Condenser Fan Error Er CF ...

Page 39: ... Fan Motor voltage 8 12V Yes 3 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Replace Main PCB No Reset the unit and Input Test1 Mode Push the button 1 time Go to 4 Fan Motor TEST MODE 1 Voltage V CON7 4th pin 6 th pin 8 12V 5 Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes 6 Explain to customer Fan Motor ...

Page 40: ... the Hinge connection Voltage V CON101 6th pin 7th pin 12V CON101 6th pin 5th pin Not 0V 5V CON101 6th pin 4th pin Not 0V 5V CON5 4th pin 6th pin Not 0V 5V CON5 4th pin 8th pin Not 0V 5V CON5 CON7 CN1 CON201 CON2 CON1 CON3 CON5 CON6 CON101 8 9 Communication Error Er CO ...

Page 41: ...101 5th pin 6th pin voltage 0V or 5V Yes No Voltage V CON101 5th pin 6th pin Not 0V 5V Change the Main PCB 4 Check the voltage Is CON101 4th pin 6th pin voltage 0V or 5V Yes No Voltage V CON101 4th pin 6th pin Not 0V 5V Change the Display PCB 5 Check the voltage Is CON5 4th pin 6th pin voltage 0V or 5V Yes No Voltage V CON5 4th pin 6th pin Not 0V 5V Change the Main PCB 6 Check the voltage Is CON5 ...

Page 42: ... 42 Symptom Check Point 1 Cube mode doesn t work 1 Check the loose connection 2 Check the resistance CON2 CON1 Ice Maker Geared Motor Dispenser Motor 8 10 Cube mode doesn t work ...

Page 43: ...S W Voltage V CON2 4thpin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Resistance Ω Geared Motor 31 1 42 1 Dispenser Motor 9 9 12 1 8 10 Cube mode doesn t work ...

Page 44: ...g the lever S W Is voltage correct compared with table No Yes LEVER S W Voltage V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Change the PCB CON1 4 Check the resistance value Is Geared Motor resistance 31 1 42 1Ω No Yes Replace Geared Motor Resistance Ω Geared Motor 31 1 42 1 5 Check the resistance value Is Dispenser Motor resistance 9 9 12 1Ω No Yes Replace Geared Motor Resistance Ω Dis...

Page 45: ... 45 Symptom Check Point 1 Cube mode doesn t work 1 Check the loose connection 2 Check the resistance Ice Maker Geared Motor Dispenser Motor CON2 CON1 8 11 Crush mode doesn t work ...

Page 46: ...W Voltage V CON2 12th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Resistance Ω Geared Motor 31 1 42 1 Dispenser Motor 9 9 12 1 8 11 Crush mode doesn t work ...

Page 47: ...pushing the lever S W Is voltage correct compared with table No Yes LEVER S W Voltage V CON1 12th pin 13th pin Pushing 9 12V Not Pushing 0 2V Change the PCB 4 Check the resistance value Is Geared Motor resistance 31 1 42 1Ω No Yes Replace Geared Motor Geared Motor Resistance Ω Geared Motor 31 1 42 1 5 Check the resistance value Is Dispenser Motor resistance 9 9 12 1Ω No Yes Replace Geared Motor Di...

Page 48: ... 2 Check the resistance valve Water Valve PilotValve Resistance Ω Pilot Valve 360 420 Water valve 360 420 CON2 CON2 LEVER S W Voltage V CON2 11th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON2 10th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V 8 12 Water mode doesn t work ...

Page 49: ...nce value Is Pilot Valve resistance 360 420Ω No Yes Replace P Valve PilotValve Resistance Ω Pilot Valve 360 420 4 Check the resistance value Is Water Valve resistance 360 420Ω No Yes Replace Water Valve Water Valve Resistance Ω Water valve 360 420 CON2 LEVER S W Voltage V CON2 11th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V CON2 10th pin B NEUTRAL Pushing 112 115V Not Pushing 0 2V ...

Page 50: ...Check the door S W resistance 3 Check the LED Lamp Resistance Ω Door S W Normal 0 Push S W Infinity Voltage V CON6 15th pin 17th pin 12V Door S W LED Lamp LED Lamp Voltage V White Yellow Closed 0 2V Open 12V LED Lamp CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON6 8 13 Freezer room lamp doesn t work ...

Page 51: ...h S W Infinity Voltage V CON6 15h pin 17th pin 12V 2 Check the door S W resistance Is it correct compared with table No Yes Change the Door S W Door S W 3 Check the PCB Voltage Is CON7 15h pin 17th pin voltage 12V No Yes Change the PCB CON6 5 Check the LED Lamp voltage Is it 0 2V While door closed No Yes Change the Door S W 6 Check the LED Lamp voltage Is it 12V While door open No Yes Change the L...

Page 52: ... 1 Check the Refrigerator door switch sticky 2 Check the door S W resistance 3 Check the LED Lamp Resistance Ω Door S W Normal 0 Push S W Infinity Voltage V CON6 1th pin 2th pin 12V Door S W LED Lamp LED Lamp Voltage V Blue Black Closed 0 2V Open 12V LED Lamp CON8 8 14 Refrigerator room lamp doesn t work ...

Page 53: ... W Normal 0 Push S W Infinity Voltage V CON6 1th pin 2th pin 12V 2 Check the door S W resistance Is it correct compared with table No Yes Change the Door S W Door S W 3 Check the PCB Voltage Is CON6 1th pin 2th pin voltage 12V No Yes Change the PCB 5 Check the LED Lamp voltage Is it 0 2V While door closed No Yes Change the Door S W 6 Check the LED Lamp voltage Is it 12V While door open No Yes Chan...

Page 54: ...eck the air Temperature 4 Check the R Damper voltage 5 Check the F Fan CON8 Duct Status Air Flow Windy Air Temperature Cold CON7 CON8 Resistance Ω 19rd pin 21th pin 270 330Ω 20st pin 22th pin 270 330Ω Duct CON7 15th pin 16th pin Resistance Ω 23ºF 5ºC 38k 32ºF 0ºC 30k 41ºF 5ºC 24k 50ºF 10ºC 19 5k 59ºF 15ºC 16k Fan Motor 8 15 Poor cooling in Fresh food section ...

Page 55: ... fresh food door and Check the air flow Windy No Yes Check the F Fan Motor Check the damper Go to 5 4 Check the air temperature Is it cold No Yes Check the Compressor and sealed system 5 Check the Damper Resistance Is it correct compared with table Change Damper No CON8 Resistance Ω 19rd pin 21th pin 270 330Ω 20rd pin 22th pin 270 330Ω Go to 9 6 Check the Fan motor Rotate fan using hand It feel st...

Page 56: ...ON6 8st pin 12th pin Not 0V 5V Check the Fan Motor voltage Is Fan Motor voltage 8 12V Yes Replace Main PCB No TEST MODE 1 Voltage V CON6 10rd pin 12th pin 8 12V Check the Fan Motor voltage Is Fan Feed Back voltage 0V 5V No Change the motor Yes 9 7 8 ...

Page 57: ... Fan motor voltage Duct Duct Status Air Flow Windy Air Temperature Cold Fan Motor CON7 17th pin 18th pin Resistance Ω 22ºF 30ºC 40k 13ºF 25ºC 30k 4ºF 20ºC 23k 13ºF 25ºC 17k 14ºF 10ºC 13k 23ºF 5ºC 10k 32ºF 0ºC 8k TEST MODE 1 Voltage V CON7 10h pin 12 th pin 8 12V CON7 8th pin 12th pin Not 0V 5V CON7 CON8 CON201 CON2 CON1 CON3 CON5 CON6 CON7 8 16 Poor cooling in Freezer compartment ...

Page 58: ...nt 1 Check the sensor resistance 2 Reset the unit and Input Test1 Mode Push the button 1 time 3 Open the fresh food door and Check the air flow Windy No Yes Check the F Fan Motor Go to 5 4 Check the air temperature Is it cold No Yes Check the Compressor and sealed system 5 Check the Fan motor Rotate fan using hand It feel sticky Yes Change the Fan motor Fan Motor No ...

Page 59: ...n Not 0V 5V 6 Check the Fan Motor voltage Is Fan Motor voltage 8 12V Yes Replace Main PCB No TEST MODE 1 Voltage V CON7 10thpin 12th pin 8 12V 7 Check the Fan Motor voltage Is Fan Feed Back voltage 1 5V No Change the motor Yes 8 Explain to customer ...

Page 60: ...he 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 Refrigerator Freezer Refrigerator Freezer Refrigerator Freezer ...

Page 61: ...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 62: ...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 63: ...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 Normal drive...

Page 64: ...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 65: ...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 40 48 1 2 ...

Page 66: ...ck the Reed S W resistance No Magnet Magnet Near the Switch 0DJQHW PXVW EH FHQWHU RI 6ZLWFK Resistance Service Action h CON5 Magnet Center Switch Center O Good position Bad position X Magnet Center Switch Center 6WDWXV Q FDVH RI RRU ORVH 9 5HVXOW 69 FWLRQ Ȥ KHFN 5HHG 6 KHFN DUQHVV disconnection I 1R RN FKDQJH 3 Q FDVH RI RRU 2SHQ 9 1 Check Reed S W 2 Check Harness disconnection 3 If No 1 2 ok chan...

Page 67: ...VKQP JCPIG 4GGF 5 9 4GOQXG UETGY LVDVVHPEOH RXVLQJ KHFN 5HVLVWDQFH RI 5HHG 6 LI LW LV 1 FKDQJH LW 1XPEHU VVHPEOH 5HHG 6 WR KLQJH FRYHU DQG VVHPEOH 5HHG 6 RXVLQJ VVHPEOH 6FUHZ WR KLQJH FRYHU Push Hook Push Hook Push first Push second ...

Page 68: ... and 22 3 ඖ Check the Reed S W resistance No Magnet Magnet Near the Switch CON7 Resistance Service Action Magnet must be center of Switch Magnet Center Switch Center O Good position Bad position X Magnet Center Switch Center 6WDWXV Q FDVH RI RRU ORVH 9 5HVXOW 69 FWLRQ Ȥ KHFN 5HHG 6 KHFN DUQHVV disconnection I 1R RN FKDQJH 3 Q FDVH RI RRU 2SHQ 9 1 Check Reed S W 2 Check Harness disconnection 3 If N...

Page 69: ... UETGY CPF FKXKFG JQWUKPI KXKFG 4GGF 5 9 3XVK WKH SDUW RI KRRN DQG GLYLGH 5HHG 6 KHFN WKH 5HHG 6 UHVLVWDQFH DQG LI LW LV 1 KDQJH LW 1XPEHU 2WUJ VJG 4GGF 5 9 VQ FKTGEVKQP QH VJG CTTQY VVHPEOH 6FUHZ DIWHU VVHPEOH 5HHG 6ZLWFK KRXVLQJ Push First push Second push ...

Page 70: ... 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 71: ...ed Motor Cube mode 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...

Page 72: ... plate is open When the damper is closed the chill rooms temperature will rise How to Measure Damper Circuit Standard Damper Test Points Red and Yellow Result 270 330 Test Points Blue and White Result 270 330 Check to see if there is electrical current if there is resistance the damper is good 1 Blue 1 Blue 3 White 4 Yellow 3 White 2 RED 2 RED 3 White ...

Page 73: ...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 74: ...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 75: ...t LED blink 1 LED blink 8 Reset LED blink 8 LED blink 7 LED blink 5 LED blink2 LED blink2 Reset 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 Harness Comp Work Comp Chec...

Page 76: ...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 11 1 Check A There is PC Board located in the PCB case The control driver is PC board for the compressor This step shows the source voltage of the driver PC board Driver PCB located in back plate cove...

Page 77: ...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 Cause Possibly harness from com...

Page 78: ...eign materials inside the compressor Logic Compressor is forced off and tries to restart within 2 5 minutes B3 LED blinks three times then repeats Stroke Trip Protection Logic Blink Blink Blink OFF Protection logic Check B Blink 3 times No Current Trip Check B3 Compressor Doesn t work Y Reset Power Y Y Harness Connecting Check C Y Compressor Damage Check C Replace Compressor No Connect trip occur ...

Page 79: ...tion Logic B5 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 B5 Compressor Intermittently works Compressor Damage Check Replace Compressor Replace Compressor Sealed System Repair N Reset Power Y IPM Check Y Replace Driver PCB N N Current trip occur Repeat Check Procedure Y Compressor Does...

Page 80: ... when C fan doesn t work Y Replace Driver PCB Repeat Check Procedure N Reset Power Purpose To detect Set control Micom and communication error Cause Communication Error Logic LED blink Compressor runs reference value before occuring communicationError Blink Blink Blink OFF Blink Blink 1 Check Temp Sound Pressure of Comp and D pipe 2 Check whether or not C Fan works ...

Page 81: ...nt 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 Co Po N C μ Po Power Co Common N C Open terminal ...

Page 82: ...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 83: ...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 84: ...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 85: ...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 86: ...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 87: ...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 88: ...ray into the ICE BIN Performs Ice Making Mode afer supplying water by operating the SOLENOID in ICE VALVE With the detect lever checks if the ICE BIN is full While ICE OFF indicator is on icemaker stops making ice But you can disense the ices until the ices run out from the ice stoare Test Button Walls until water becomes cold after starting the icemaking operation To operate LINE and SERVICE pres...

Page 89: ...o select the on position Check the water lines at the back of the unit for any kinks or leaks that could be inhibiting water flow to the icemaker If the water lines at the back of the unit art kinked straighten them out If there are any leaks refer to the water line installation section of the Use and Care Guide At least 12 hours are needed to make the first ice after installation And one day is n...

Page 90: ...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 91: ...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 92: ...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 93: ...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 94: ... 94 14 DESCRIPTION OF FUNCTION CIRCUIT OF MICOM K A HKIDA K A HKIDA K A HKIDA ...

Page 95: ... 95 K A HKIDA K A HKIDA ...

Page 96: ...y again to cancel the display mode 3 All Freezing unit will be turned off at display mode Exceptions Lamp Display 14 1 9 CONTROL OF FREEZER FAN MOTOR 1 Freezer fan motor has high and standar speed 2 When refrigerator is overloaded fan motor runs in high speed as powered up Standard speeds is used for general purposes 3 To improve cooling speed the RPM of freezer fan motor changs from normal speed ...

Page 97: ...e control 2 You can adjust the Pantry control with three different temperature ranges by pressing the Temp Selector button 14 1 16 Defect Diagnosis Function 1 Automatic diagnosis makes servicing the refrigerator easy 2 When a defect occurs the buttons will not operate 3 When the defect CODE removes the sign it returns to normal operation RESET 4 The defect CODE shows on the Refrigerator and Freeze...

Page 98: ...00A S11 S11 406D 610D S04 207A B02 249C 262B S14 302B 400A 408A 310B 306A 300A 314A 317A 318A 303C 304A 301A 308B 403B 312C 262H S14 410G 303A 624C 624G 626A 624E 500P 105D 406B 249D S10 145B 271D 315C 315B 315C 315B 103B 103A 610F 308A 105B 120B 405H 405P 329A 332C 405C 405F 407A 610C 404A S11 409D 158A S11 409F 405J 503D 158C 145A 120A 409H 282G 405I 628A 631C 603C 402A 402A ...

Page 99: ...FREEZER PARTS CAUTION Use the part number to order part not the position number 145C 145F 170B 134B 132P 136A 205D 253D 150C 150D 150B 136B 131A 133C 133B 136C 150H 243J 243J ...

Page 100: ...ARTS 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 141D 154A 146E 161A 151A 161C 151C 161C 151B 161B 162A 162B 145D ...

Page 101: ...43C 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 241K 241K 241K 312B 241E 624A 405M 409I 405M S05 B06 212D B06 206L 206K 205E 250F 250K 407G 500C ...

Page 102: ...DISPENSER PARTS CAUTION Use the part number to order part not the position number 279B 276A 276B 405A 281A 501A 279C 279A 276F 276G 276I 278C 501D 279L 278D 279K 275A 402E 402C ...

Page 103: ...VALVE WATER TUBE PARTS CAUTION Use the part number to order part not the position number 617A 623B 616D 625A 603C S31 616F 603B 625A 616G 616J 616E 623A 616S 619A 627A S31 616J 627A 616R 619F 619J ...

Page 104: ...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 Freezer Room 600B 600F ...

Page 105: ...P No MFL68488612 JUL 2014 Printed in Korea ...

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LG LFXS29626, Service Manual

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