LG LMX25964 Series Service Manual Download Page 1

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Summary of Contents for LMX25964 Series

Page 1: ...REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LMX25964 COLOR STAINLESS ...

Page 2: ... PULLOUT DRAWER 14 17 4 ADJUSTMENT 18 19 COMPRESSOR 18 PTC STARTER 18 OLP OVERLOAD PROTECTOR 19 TO REMOVE THE COVER PTC 19 5 CIRCUIT DIAGRAM 20 6 TROUBLESHOOTING 21 25 COMPRESSOR AND ELECTRIC COMPONENTS 21 OTHER ELECTRICAL COMPONENTS 22 SERVICE DIAGNOSIS CHART 23 REFRIGERATION CYCLE 24 25 7 OPERATION PRINCIPLE REPAIR METHOD OF ICEMAKER 26 28 8 DESCRIPTION OF FUNCTION CIRCUITS ERROR CODES 29 45 9 E...

Page 3: ...EVAPORATOR CONDENSER REFRIGERANT LUBRICATING OIL DEFROSTING DEVICE REFRIGERATOR LAMP FREEZER SPECIFICATIONS TransparentDrawer Type Linear Fin Tube Type Spiral Condenser R 134a 145 g FREOLa8G 180 ml SHEATH HEATER LED Module 21 Bulb Lamp DiMENSiONS i i G iii i Description LMX25964 Depth w Handles A 34 1 4 in Depth w o Handles B 31 1 4 in Depth w o Door C 27 7 8 in Depth Total with Door Open D 46 1 2...

Page 4: ...erator compartment shelves are adjustable to allow flexibility for storage needs O MODULAR DOOR BINS Three interchangeable bins can be arranged to suit your storage needs _ LED INTERIOR LAMPS _ FIXED DOOR BIN O INTERIOR LAMP BOTTLE HOLDER OPTIONAL Ice Bank Ice Door J 4 ...

Page 5: ...TION 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 Disconnect wire harness 3 4 Remove the grounding screw 4 4 Rotate hinge lever 5 clockwise Lift top hinge 6 free of hinge leve...

Page 6: ...Pull gasket back to expose gasket bracket clip and door frame 2 Insert a flat tip screwdriver into seam between gasket bracket and door frame and pry back until clips snap out 3 Continue prying back along seam until all clips snap out 4 Push in remaining clip until you hear it snap securely into place Note Make sure that no part of gasket bracket edge protrudes from beneath door frame edge 2 Inser...

Page 7: ...Insert additional snap rings until the doors are aligned Three snap rings are provided with unit Figure 8 3 4 FAN AND FAN MOTOR EVAPORATOR 1 Remove the freezer shelf If your refrigerator has an icemaker remove the icemaker first 2 Remove the plastic guide for slides on left side by unscrewing phillips head screws 3 Remove the grille by removing one screw and pulling the grille forward 4 Remove the...

Page 8: ...Defrost Sensor and FUSE M The Defrost Sensor works to defrost automatically It is attached to the metal side of the Evaporator and senses its temperature At 46 F 8 C it turns the Defrost Heater off Fuse M is a safety device for preventing over heating of the Heater when defrosting 1 Pull out the grille assembly Figure 10 2 Separate the connector with the Defrost Control assembly and replace the De...

Page 9: ...n and forward 2 Hold the left and right side of the Cover Assembly dispenser as shown in the picture and pull and remove it The cover dispenser is attached with a hook CAUTION When replacing the dispenser cover in the reverse order of removal be careful that the lead wire does not come out and the water tube is not pinched by the dispenser cover as shown in the picture below 3 10 DISPLAY PWB REPLA...

Page 10: ...SPENSER 1 Loosen the screw on the sub PWB 3 15 ICEMAKER ASSEMBLY 1 Loosen two screws as shown in the first picture 2 Pull the sub PWB down 3 Disconnect the wire harness and replace the sub PWB in the reverse order of removal 2 Disconnect the wire harness ground screw replace thelcemaker assembly in the reverse order of removal 3 13 DUCT DOOR REPLACEMENT 1 Pull up and out on the dispenser cover to ...

Page 11: ...ews holding the auger motor cover shown in the picutres below 2 Grip the bottom of motor cover assembly and pull out it 3 Disconnect wire harness of motor cover assembly There is a auger motor on the back as shown in the picture Auger Motor Icemaker Power Full detection Signal 11 ...

Page 12: ...e 3 18 HOW TO INSERT A DOOR ICE BIN 1 Insert the Ice Bin slightly tilting it to avoid touching the Icemaker especially ice maker lever 2 Lift the lower part slightly _ Insert the ice bucket carefully avoid contacting the automatic shut off arm 3 Take the Ice Bin out slowly 12 ...

Page 13: ... 3 Remove the two screws from the guide rails one from each side Step 4 Removal of the freezer door is done by lifting clear of the rail support Fully extend both rails Step 5 Remove only 1 screw of gear ice and disassemble the bar and gear ice Step 6 Remove 2 screws of both side of supporter covers tv and disassemble the supporter cover tv 13 ...

Page 14: ...onnector rails and then screw them Step 2 _ Assemble a bar and gear ice with screw 2_ Push the otherside of the gear to inside of the bar Step 3 Put gear ice assembled with the bar by screw into connector rail s hole Step 4 Insert opposite gear ice into connector rail and screw them 14 ...

Page 15: ...ection Pull the rails back out to full extension Step 6 Reinstall the freezer door by inserting the rail tabs into the guide rail Assemble them like as pictures Step 7 Reinstall the two screws into the guide rails one from each side Step 8 Reinstall the top drawer and close the freezer door 15 ...

Page 16: ... Separate the housing and pull out the valve Housing 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 Press the WATER DISPENSER button until water pours out and check for leakage in the CONNECTOR TUBE It differs by the water pressure but usually takes about 2 minutes until water pours out 4 L...

Page 17: ...r open to full extension Remove the drawer and Ice Bin lifting the basket from the rail system 3 23 BOTTOM 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 17 ...

Page 18: ...ating motion we have protection logic for compressor motor and PCB as the below Stroke Trip During the operation if stroke is above the target vaJue decrease the target volt by 3V Current Trip Current trip is set in order to protect compressor mechanical part and drive from the overcu rrent that might arise during the operation Check the current for every 416 7 s and if the Trip exceeds 1 86Arms m...

Page 19: ... RED BLANC ROUGE BNtWH BROWN WHITE MARRON BLANC R_YL RED YELLOW ROUGE_AUNE YL YELLOW JAUNE GN GREEN VERT PR PURPLE PURPLE WH WHITE BLANC WH BK WHITE BLACK LANC NOIR YUBK YELLOW BLACK JAUNE NOIR P_WH PURPLE_HITE VlOLE_BLANC BL RD BLUEiRED BLEU ROUGE SB SKYBLUE BLEU BLANC PK PINK ROSE GN YL GREEN YELLOW VERT JAUNE BL_H BLUE_HITE BLEU BLANC RDANH RED_HITE ROUGE BLANC GY W_ GRAY WHITE GRIS BLANC BOIBL...

Page 20: ...used It is caused when F B signal isn t over 65 seconds during Brushless DC FAN motor operating It is caused when F B signal isn t over 65seconds during Brushless DC FAN motor operating It is caused when F B signal isn t over 65seconds during Brushless DC FAN motor operating Communication Error between Micom of Main PCB and Display Micom Communication 10 Error Each Sensor have to check disconnecti...

Page 21: ...7 PCB Picture 7 1 Main PCB P No MFG EBR73304201 2011 03 CON1 CON201 Picture CON2 CON3 CON5 CON7 21 ...

Page 22: ...7 2 Display PCB Sub PCB P No Picture Display PCB EBR433585 2010 02 Sub PCB EBR60070706 2010 02 CON3 CON1 22 CON2 ...

Page 23: ...iiiiiiiiiiiiiiiiiiiiiiiiiiii_i_ iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii 0 S Short Change the sensor Infinite Replace the ohms Open refrigerator See Check the Temp and resistance Normal resistance Table I table Temperature table l 22 F 30 C 40 k_ 13 F 25 C 30 k_ 4 F 20 C 23 k_ 5 F 15 C 17 k_ 14 F 10 C 13 k_ 23 F 5 C 10 k_ 32OF OoC 8 k_ The sensor is determined by the temperatur...

Page 24: ...White CON4 0 _ Short Change the sensor Infinite Replace the ohms Open refrigerator See Check the Temp and resistance Normal resistance Table 2 table Temperature table 2 23 F 5 C 38 k_ 32 F O C 30 k_ 41 F 5 C 24 k_ 50 F 10 C 19 5 k_ 59 F 15 C 16 k_ The sensor is determined by the temperature For example 30k indicates 32 F 24 ...

Page 25: ...the main PCB If they are Infinite Open open between the ohms Main PCB and the connector for the icemaker it will be necessary to replace the refrigerator See Check the Temp and resistance Normal resistance Table I table Temperature table l 22 F 30 C 40 k_ 13 F 25 C 30 k_ 4 F 20 C 23 k_ 5 F 15 C 17 k_ 14 F 10 C 13 k_ 23OF 5oc 10 k_ 32OF OoC 8 k_ The sensor is determined by the temperature For examp...

Page 26: ...iiiiiiiiiiiiiiiiiiiiiii iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii 0 _ Short Change the sensor Infinite Replace the ohms Open refrigerator See Check the Temp and resistance Normal resistance Table 3 table Temperature table 3 22 F 30 C 40 k_ 13 F 25 C 30 k_ 4 F 20 C 23 k_ 5 F 15 C 17 k_ 14 F 10 C 13 k_ 23 F 5 C 10 k_ 32OF OoC 8 k_ The sensor is determined by the temperature For exampl...

Page 27: ... times Normal Check the Blue Pin4 to Orange PinD at CON3 on the main PCB CON3 0_ Fuse M Other Change Fuse M Defrost 34 42 _ Goto the 3 Heater Other Change Fuse M 0 _ Go to the 3 Defrost Sensor Go to the 3 Infinite ohms Check the resistance of the defrost sensor wires back to the main PCB If they are open between the Main PCB and the connector for the icemaker it will be necessary to replace the re...

Page 28: ...ult SVC Action i i i i i i i i iiiiiiiiii ii ii ilililili i ii i i i i i iiii ii il No airflow Go to 3 Airflow Go to 4 Rotate fan using your hand It feel stuck or locked up change the motor Cause of ice or rust inside of motor iiiiiiiiiiiiiiiiiiiiiiiiii ii ii i i i i i i i i i i i i i 1 2 2 3 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii i ii i i ii i iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii...

Page 29: ...aused the PCB short Check the Fan motor Frozen Lock ect Check the Fan motor voltaqe 1 Pin1 2 Pin3 3 Pin5 CON7 Tip iiiiiiiiii ii ii i iv i i i i No airflow Go to the 3 4 Airflow Go to the 5 To protect ice short add wire seal in connector We developed new type connector so order the new type Wire seal Silicon iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii...

Page 30: ...code is displayed the fan is not working Check the Fan motor and surrounding Check the Fan motor voltage 1 Pin2 2 Pin4 3 Pin6 CON7 i i i i i i i i iiiiiiiiii ii ii ilililili iiii i i i i iiiiiiil No airflow Check motor Airflow Go to the 4 Rotate fan using your hand It feel stuck or locked up change the motor 1 2 Below 10 V Change the PCB 2 3 0 or 5 V Change the motor 30 ...

Page 31: ... iiiii iiiii iiiiii iiiii ii_i _ _i_i_i ii_i _i _i _i _i _ i _i _i _i _i _i _i _i _ ii_ i_ _ iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii ii_i_i_ii ii_ i_ _i_i i_i_i_i_iii_ _i _i_ ii i i ii ii ii ii ii ii ii i i ii ii ii ii ii ii ii i i ii ii ii ii ii ii ii i i ii ii ii ii ii ii ii i i ii ii ii ii ii i _i _ 0 V or 5 V Change the Display PCB Other G...

Page 32: ...Other iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_ii_ _i Go to the 3 Change PCB Go to the 3 Change PCB Activated Not activated 9 12V Other 0 2V Other iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_ii_ _i Go to the 4 Change PCB Go to the 4 Change PCB iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_ ii_ i_i_i_i_i_i_i_i_i_i_i_i_i_ iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_ _i_i _ii_ iiiiiiiiiiiiiiiiiiii_i_ _ _...

Page 33: ...iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_ii_ _i_ 112 115V Other 0 2V Other Go to the 3 Change PCB Go to the 3 Change PCB Activated Not activated iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_i _iii_iJ_ii_ii_ _ii_ii_ii_ii_ii_ii_ii_il _ii_ii_ii_ii_ii_ii_ii_il _iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_ii_ _i_ 112 115V Other 0 2V Other Go to the 4 Change PCB Go to the 4 Change PCB iiiiiiiiiiiiiiiiiiiiiiiiii...

Page 34: ...aii_i i i i i i i i i i i il iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiiiiiiii _i_ii iilili i_ _ii _ _i_ii _i ii iii ii _iii iii ii _ iii iii ii _i ii iii ii _i i_i 0_ Go to the 3 Other Change door S W Push Infinity Go to the 3 S W Change door S W Closed 5 V Go to the 4 Other Change the Door S W 0 V Go to the 4 Open Other Change the Door S W Closed 0 2 V...

Page 35: ...k to White 0 _ Go to the 3 Other Change door S W Push Infinity Go to the 3 S W Other Change door S W Normal iiiiiiiiiiiiiiiiiiiiiiiii i iliiiii i ii ii ii ii i i i i iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii 12 V Go to the 4 Other Change the PCB iiiiiiiiiiiiiiiiiiiiiiiii ii ii iili i i i i i i i i i iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii 12 V Go to the 5 Other ...

Page 36: ...41 F 5 C 24 k_2 50 F 10 C 19 5 k_2 59 F 15 C 16 k_2 i i i i i i i i i i i i _i i_ii_ i i iii ii_ii_i i_i_i_ _i_ii_i ii_i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i i _i Airflow Go to the 4 Check the R Fan motor No airflow Check the damper Go to the 6 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _i_i_i_i_ _i _i _i Ii ii_ii _ii_ii_ii _ii_ii_i i_ii_ii _ ii_ii_ii _ _i_ii_ i _ i_ii_ i_ ...

Page 37: ...ocked up change the motor Cause of ice or rust inside of motor Check the F Fan motor voltage 1 Pin8 2 Pin10 3 Pin12 CON7 1 Mode 2 Mode 1 2 mode 1 to 2 3 to 4 1 2 2 3 Open Closed Damper is normal Check the Damper Not working Change the damper 270 330_ Other 270 330_ Other Normal Change damper Normal Change damper Below 12 V Change the PCB 0 or 5 V Change the motor 37 ...

Page 38: ...iiiiiill ili_iill iii lil iii_iiill iiiiii iiiii iiiii iiiiii iiiii iii iii iiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii iiiii iiiii iiiiii ii ii ii_iiiii _iilili iilil ilili _ iilili iilil ilili _iilili iilil iiili _iilil 22 F 30 C 40 k_2 13 F 25 C 30 k_2 4 F 20 C 23 k_2 5 F 15 C 17 k 2 14 F 10 C 13 k_2 23 F 5 C 10 k_2 32 F 0 C 8 k_2 i i i i i i i i i i i i i i i i _ _i_ _ _ _ _ ...

Page 39: ...Push the button 1 time Open the refrigerator door and Check the air flow Input Test 2 Mode and Check the air flow Push the button 1 time Check the damper resistance 23 F 5 C 38 k_ 32 F 0 C 30 k_ 41 F 5 C 24 k_ 50 F 10 C 19 5 k_ 59 F 15 C 16 k_ Airflow Go to the 4 Check the R Fan No airflow Check the damper Go to the 5 Airflow Go to the 5 No airflow Normal 1 to 2 270 330_ Normal Other Change damper...

Page 40: ...n PCB the refrigerator will be enter the TEST MODE Main PWB 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 2 How to remove Terminal Position Assurance TPA AC TPA DC TPA After measure the values you should put in the TPA again 40 ...

Page 41: ...62 k_ 3 23 V 4 F 20 0 22 33 k_ 2 89 V 5 F 15 C 16 99 k_ 2 56 V 14 F 10 0 13 05 k_ 2 23 V 23 F 500 10 10 k_ 1 92 V 32 F O C 7 88 k_ 1 63 V 41 F 500 6 19 k_ 1 38 V 50 F 10 0 4 91 k_ 1 16 V 59 F 15 0 3 91 k_ 0 97 V 68 F 2000 3 14 k_ 0 81 V 77 F 2500 2 54 k_ 0 67 V 86 F 3000 2 07 k_ 0 56 V 95 F 3500 1 69 k_ 0 47 V 104 F 4000 1 39 k_ 0 39 V 41 ...

Page 42: ... 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 225 1 k_ 169 8 k_ 129 3 k_ 99 30 k_ 76 96 k_ 60 13 k_ 47 34 k_ 37 55 k_ 30 k_ 24 13 k_ 19 53 k_ 15 91 k_ 13 03 k_ 10 74 k_ 8 89 k_ 7 40 k_ 6 20 k_ 4 48 V 4 33 V 4 16V 3 95 V 3 734 V 3 487 V 3 22 V 2 95 V 2 67 V 2 40 V 2 14V 1 89 V 1 64 V 1 45 V 1 27 V 1 10V 0 96 V 42 ...

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 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 15s 15s N rmal dri...

Page 44: ...he unusual high temperature Sensor give temperature information to Micom Measure the 2 pin connected to Fuse M If the ohmmeter indicate below O 1ohm Fuse M is good If Fuse M measures infinite ohms it is open and needs to be replaced Measure the 2 pin connected to Sensor If the ohmmeter indicate 11k 2 at room temperature It is normal Checking the resistance at other temperatures check the sensor re...

Page 45: ...s a part for defrost 1 2 Measure the 2 pin connected to Sheath Heater If resistance is between 34 42 ohms the heater is normal If it measures infinite ohms the heater is open and needs to be replaced Sheath heater at all temperature Test Point Ressult 1 to 2 34 42_ 45 ...

Page 46: ...11 3 Door Heater Assembly Function How to Measure Standard The heater is designed to prevent the exterior moisture on the door GY BL BN YL I i i Test Point Ressult 1 to 2 2 3 2 9_ 46 ...

Page 47: ...ed or closed by sending a signal to the Main PCB How to Measure Standard Switch Freezer Switch Refrigerator Button Plunger Beep Beep Check the resistance between connectors 1 2 and 3 4 Multimeter beep Switch F R Nomal Push the button Plunger O_ None _ _ 47 ...

Page 48: ...oid Function How to Measure Standard Dispenser solenoid When customer push the dispenser button Pull duct door and abstract from ice bank Dispenser Solenoid Dispenser Solenoid Test Points Result 1 to 2 44 54_ 48 ...

Page 49: ...system Geared Motor Take out the male housing from female housing Measure the resistance between 1 and 2 Geared Motor Remove the female housing from terminal Measure the res istance between 3 and 4 Check the resistance between connectors Geared motor 1 2 and solenoid 3 4 It means check whether or not applying an Electric current If there is resistance it means the geared motor or solenoid is not i...

Page 50: ... I I i I I I I I I Table 2 2 2 _0 XF_ CW Rotation Housln_ No Step L Wire Color I 2 3 4 t Blue A 2 Red B 3 White AT 4 Yellow E_ i I I I I I I I i I I I L L i Damper Circuit Blue Yellow Red White Blue White Check the extension Check the Check the resistance between connectors 1 3 and 2 4 Check the Damper Test Points Result Red and Yellow 373 456_ Test Points Result Blue and White 373 456_ 50 ...

Page 51: ...et Function How to Measure Standard Make sure the light bulb is screwed in tight to the light socket Check the resistance between connector of housing and connector of lamp socket Test Points Result 1 to 2 and 3 to 4 O_ 51 ...

Page 52: ...isconnect Power On Protection Logic TEST 1 Mode PCB OK Check Voltage about 200V past 30second after turn on Test Mode TEST1 Ref Forced Starting Comp FC75 A Inverter TDC Full Stroke Display sound Display ON Buzz 1 time Refer Troubleshooting LED blink2 LED blink6 Y N 52 ...

Page 53: ... PC Board located in the PCB case The control driver is PC board for the compressor This step shows the source voltage of the driver PC board Step1 Open PCB Cover Step2 Check Driver PCB Driver PCB located in machine room 53 ...

Page 54: ... Blink OFF Purpose Prevent abnormally long piston strokes Case 1 If compressor doesn t work and LED blinks Cause Possibly harness from compressor to PCB might be defective Case 2 If compressor works intermittently and LED blinks Cause Condenser Fan or Freezer Fan is not running Sealed system problem such as moisture restriction restriction at capillary tube or refrigerant leak Logic Compressor is ...

Page 55: ... d u r_ _ _ 1 N B4 LED blinks six times then repeats Current Trip A E lnverters Protection Logic Blink Blink Blink Blink Blink Blink OFF Purpose Prevent over current overload protect Cause Ambient temperature is high over 43 C and or refrigerator s condenser air movement is restricted Condenser Fan is stopped restricted discharge line compressor is damaged or IPM device is defective Logic Compress...

Page 56: ...ion Logic Blink Blink Blink Blink Blink Blink Blink OFF Purpose Prevent high current due to IPM Short Cause Damaged IPM Dead Short Test for a dead short at Point A with a VOM Logic Compressor is forced off and tries to restart in 20 minutes I Protection _ logic Check B 56 ...

Page 57: ...t B Step 6 Point D _ Replace Compressor Harness 1 Connecting OK Caution Turn off power during checkC 1 m 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 A Multi Tester J c B Co Po Power Co Common N C Open terminal L l 1 Because of ambient temperature or operating situations the val...

Page 58: ...rost is present 150mm from where the suction line enters the compressor Temp of compressor and discharge line is normal to stightly 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 _ Customer co...

Page 59: ...p 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 59 ...

Page 60: ...on on on off on on on on on on on off repeating Please check Whether connector of compressor is attached rightly or not after power off After the first action You check on normal operation of compressor If the same symptom arises after the second action replace PCB After resetting power check if it is running normal If the same symptom arises after the first action If the same symptom arises after...

Page 61: ...cessary objects placed in the back side of the unit Check if the Drip Tray is not firmly fixed Check if the cover of the compressor enclosure in the lower front side is taken out Check if the door gasket is dirty with an item like juice Is the refrigerator level Is there too much food in the refrigerator Check if the inside of the unit is dirty Are foods with a strong odor unwrapped The unit smell...

Page 62: ...wing sound of refrigerant is not heard and frost melts Low flowing sound of refrigerant is heard and frost forms in inlet only Flowing sound of refrigerant is not heard and there is no frost TEMPERATURE OFTHE COMPRESSOR A little higher than ambient temperature Equal to ambient temperature A little higher than ambient temperature Equal to ambient temperature Lower than ambient temperature A little ...

Page 63: ...as a defrost problem problem has been isolated to sealed system area __ None Test Very Slow _ r Very Fast g a m Hotter than Normal 1 Room Temperature I r Trace of Oil _ soCap Tube und Faint 1 _ None to Weak Yes The equalization test is trying to restart a compressor using a start kit after it has been operating 63 ...

Page 64: ...l Reaches Start Position Performs Ice Making Mode after supplying water by operating the SOLENOID in ICE VALVE To operate LINE and SERVICE press and hold the Fill Key for 3 seconds The icemaker will run through 3 stages Harvest _ Fill _ Icemaking 1 Turning the Icemaker stop switch off O stops the ice making function 2 Setting the Icemaker switch to OFF and then turning it back on will reset the ic...

Page 65: ... of ice in the ice storage bin while rotating with the EJECTOR A Ice storage bin is full The EJECTOR stops heater off B Ice storage bin is not full The EJECTOR rotates twice to open for ice _ If the EJECTOR does not rotate once within 5 minutes in B mode separate heater control mode starts operating to prevent the EJECTOR from being constrained It is recommended that the user open for ice to retur...

Page 66: ...o the pre test setting Diagnosis TABLE STAGE ITEMS HEATER MOTOR HALL IC I HALL IC II VALVE Reset INDICATOR Return to Status prior to TEST MODE REMARKS Five seconds after heater starts a heater will go off if the temperature by sensor is higher than 10 C Five seconds after heater starts you can confirm that a motor is moving Check if Ice Bin is full or not If Ice bin is full the motor and heater ar...

Page 67: ...lock the display the dispenser and the control panel press and hold the LOCK button for 3 seconds The locked pad lock icon is displayed 3 The LOCK button is the only control feature that remains active in the locked state The buzzer sound other control buttons and the dispenser are deactivated 4 To release from the locked state press and hold the LOCK button again for 3 seconds Ex In selecting Ex ...

Page 68: ...and when refrigerator is overloaded Standard speeds is used for general purposes 3 To improve cooling speed the RPM of the freezer fan motor change from normal speed to high 4 High speed 2700RPM Initial power on or load corresponding operation ICE PLUS Normal speed 2400RPM General working conditions 5 Fan motor stops when refrigerator or freezer door opens P_eStcSing I I 14 1 8 Cooling Fan Motor 1...

Page 69: ...s function will start seven minutes after defrost is completed and it shall operate for three hours 4 If ICE PLUS is selected within seven minutes after compressor has stopped the compressor compressor delays seven minutes shall start after the balance of the delay time 5 The fan motor in the freezer compartment runs at high speed during ICE PLUS 6 For the rest of the 21 hours the freezer will be ...

Page 70: ... Defrosting won t function if its sensor is defective wires are cut or short circuited 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 returns to normal operation RESET 4 The defect CODE shows on the Refrigerator and Free...

Page 71: ...13 EXPLODED VIEW REPLACEMENT PARTS LIST CASE PARTS CAUTION Use the part number to order part not the position number 310B I i i 1 1 ...

Page 72: ...FREEZER PARTS CAUTION Use the part number to order part not the position number 2 ...

Page 73: ...REFRIGERATOR PARTS CAUTION Use the part number to order part not the position number 3 ...

Page 74: ...DOOR PARTS CAUTION Use the part number to order part not the position number 230B 231B 25 244A 24i _ i iii i i 250A _201Bt 249J 4 ...

Page 75: ...DISPENSER PARTS CAUTION Use the part number to order part not the position number I I I I I I I I I I I I I I I I I I I I 5 ...

Page 76: ...ICE MAKER PARTS CAUTION Use the part number to order part not the position number 623B 16J 616D 6 ...

Page 77: ...ICE BANK PARTS CAUTION Use the part number to order part not the position number f 7 ...

Page 78: ...LG El n_cs into P No MFL48178836 MAY 2011 Printed in Korea ...

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LG LMX25964 Series, Service Manual

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Summary of Contents for LMX25964 Series

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