LFX25960ST Service Manual
Contents
1. Connector4 1 09 C pa 2 lt lt A _ lt All E O SE Connector2 x NS M 25 C x 26 D D O 5 mI CO 5 7182 O C O O O T e zelus O2. FAN ASSEMBLY MOTOR Mechanical Cover 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 Lay a dry towel on the floor and get ready to spill water from the water filter Pull out the Cilp Then press te collet to separate the tube from the connector and pour out the water until emptied Collet Tube Collet Tube Insert Line Clip Insert Line Clip 15 3 22 PULL OUT DRAWER separate the drawer push the front left and right hooks D direction to pull up and remove Then gently lift the gear part of rear left and right side of the drawer and pull it out in direction To install reposition the gear part of rear left and right side of the drawer after pulling out both rails as much as possible and gently push down both left and right side while checking the hook on the front part 16 4 ADJUSTMENT 4 1 COMPRESSOR 4 1 1 Role 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 Composit
3. O O O O O lt 0 0 G O fo JV e 2 O 22 O L 2 O o Ir CN CO e Ps 2 Ef U O n I O O O m Connector3 gt 4 e ta 5 D O 2 O AAA O E O 4 0 ol O e OW C O O NN c uiua B gt D C 5 EN t K CO NO C C AAN O 0 _ O 42 9 EXPLODED VIEW amp REPLACEMENT PARTS LIST CAUTION Use the part number to order part not the position number CASE PARTS CAUTION Use the number to order the position number FREEZER PARTS 44 CAUTION Use the number to order part the position number REFRIGERATOR PARTS some models 45 CAUTION Use the number to order part the position number DOOR PARTS on some models A only for the service 46 CAUTION Use the number to order part the position number DISPENSER PARTS 47 CAUTION Use the number to order part the position number ICE amp MAKER PARTS 48 ICE BANK PARTS CAUTION Use the part number
4. s liquid food sealed e Check if food put in the refrigerator is hot Did you open the door of the unit too often or check if the door is sealed properly e Check if the ambient temperature and humidity of the surrounding air are high s there a gap in the door gasket s the unit positioned in a firm and even place e Are any unnecessary objects placed in the back side of the unit e Check if the Drip Tray is not firmly fixed e Check if the cover of the compressor enclosure in the lower front side is taken out e Check if the door gasket is dirty with an item like juice s the refrigerator level s there too much food in the refrigerator e Check if the inside of the unit is dirty Are foods with a strong odor unwrapped e The unit smells of plastic e Other possible problems Check if frost forms in Not the freezer Check the refrigeration system Check the Thermistor defrosting The system is faulty The operation of the Thermistor is incorrect REMEDY Plug into the outlet e Set the switch to ON Replace the fuse f the voltage is low correct the wiring Place the unit about 4 inches 10 cm from the wall Place the unit away from these heat sources Lower the ambient temperature e Put in foods after they have cooled down e Don t open the door too often and close it firmly e Set the control to Recommended position Place foods in the hig
5. Figure 10 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 Fan Motor assembly by loosening 2 screws and disassembling the shroud 5 Pull out the fan and separate the Fan Motor and Bracket BW FAN MOTOR BRACKET Figure 11 Ice Fan Scroll Assembly Replacement 3 6 LAMP 1 Remove the plastic guide for slides on left side by unscrewing phillips head screws 2 Pull the grille forward as shown in the second picture 3 Disconnect wire harness of the grille 4 Remove the scroll assembly by loosening 2 screws Figure 14 3 6 1 Refrigerator Compartment Lamp 1 Unplug Refrigerator or disconnect power at the circuit breaker 2 If necessary remove top shelf or shelves 3 Using a flat instrument gently pry the cover loose in the front as shown Rotate downward to remove rear tabs 4 Make sure the bulbs are cool to the touch Turn bulbs counterclockwise to remove 5 Assemble in reverse order by snapping the Lamp Cover in engaging the rear tabs followed by the front tabs Max 60 W 2EA 3 3 5 DEFROST CONTROL ASSEMBLY Defrost Control assembly consists of
6. Bracket Figure 2 3 Remove gasket Pull gasket free from gasket channel on the three remaining sides of door Figure 3 Door Gasket Replacement 1 Insert gasket bracket clips 1 Insert gasket bracket edge beneath door frame edge 2 Turn upper gasket bracket spring so that the spring ends are in the door channel 3 Push in clip until you hear it snap securely into place Gasket m Bracket Clip Spring Door Correct Incorrect Figure 4 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 Insert gasket into channel 1 Snap gasket assembly into the door bracket lt Inserting the Gasket Assembly into the Bracket Door gt Correct Incorrect Figure 5 2 Press gasket into channels three remaining sides of door Figure 6 3 Replace door frame cover Starting at top of cover and working down snap cover back into door 3 3 DOOR ALIGNMENT the space between your doors is uneven follow the instructions below to align the doors 1 With one hand lift up the door you want to raise at middle hinge 2 With other hand use pliers to insert snap ring as shown 3 Insert additional snap rings until the doors are aligned Three snap rings are provided with unit Figure 7
7. Check resistance The range of resistance is between 1 50Q ok gt resistance of between M C S C and Motor M S in Motor Open or short Replace Compressor Compressor Compressor gt gt gt Check Check resistance of resistance of two terminals in Reference Page12 PTC Starter PTC Starter Check OLP Check resistance of two terminals in OLP Reference Page12 Check Check the power supply Supply YES o YES Compressor starting state under load voltage rating compressor is OK Compressor attempting with 10 Replace the NO compressor D start to re start after being off for 5 minutes 20 6 2 OTHER ELECTRICAL COMPONENTS V Not cooling at all Compressor Check for open short or doesn t run C gt incorrect resistance readings in the following components a Starting devices Shot open or broken Poor contact or shorted b OLP c Compressor coil 39 Coil open or shorted d Wiring harness gt Poor contact o gt Replace or shorted indicated component V Poor cooling performance Compressor runs poorly Check starting voltage Low voltage Advise customer that the Power supply needs to be checked by an electrician Replace indicated component Check voltage at Poor or broken or starting devices open contact Check current flowing Shorted in sub coil of Compressor Check ra
8. FOR p i 1 H fy ES Depih wo Handles ymn aam Total with Door Open 0 n Heightto Top ofGase 8888m n _ 44 1 4 in 44 1 4 in Height to Top of Door Hinge Width Width door open 90 deg w o handle Width door open 90 deg w handle 2 PARTS IDENTIFICATION Refrigerator Light Filter Inside 9 Modular Door Bins Refrigerator Shelves 3 Supra Fresh Crisper with Tilt Out Compartment Room Ice Maker and Ice Bank Pull out Drawer Turbo Motor Tilt Out Door Basket Durabase Divider 9 M Water Tank Cover Q Snack Pan Egg Box Dairy Bin Bottle Holder Ice Bank Ice Door 3 DISASSEMBLY 3 1 REMOVING AND REPLACING REFRIGERATOR DOORS Removing Refrigerator Door A CAUTION Before you begin unplug the refrigerator Remove food and bins from doors gt Left Door FIG 2 1 Disconnect water supply tube by pushing back on the disconnect ring 4 FIG 1 2 Open door Loosen top hinge cover screw 1 Use flat tip screwdriver to pry back hooks on front underside of cover 3 Lift up cover Disconnect door switch wire harness 2 Remove cover Pull out the tube Disconnect the three wire harnesses 5 Remove the grounding screw 6 Rotate hinge lever 7 counterclockwise and rem
9. after a power failure it is set to Control temperature Previously E to up Lo KC mmc DOOR ALARM A 177 g FOUT G HOLD 3SECS DISPENSER amp BUTTON ICE PLUS DISPENSER FREEZER REFRIGERATOR LIGHT FILTER ALARM LOCK 8 1 2 How to Toggle the Display between amp C 1 The initial setting is F and the display temperature mode can be changed from F to C or C to F by pressing and holding the FRZ TEMP and the REF TEMP keys at the same time for over 5 seconds 8 1 3 Lock function dispenser and display button lock 1 When the refrigerator is first turned on the buttons are not locked The display panel shows the padlock unlocked icon 2 To lock the display the dispenser and the control panel press ie 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 Ex In selecting In selecting and the dispenser are deactivated Er LOCK again 4 To release from the locked state press and hold the LOCK button again for 3 seconds Press amp Hold Press amp Hold 8 1 4 Filter condition display function 1 There is a replacement indicator icon for the filter cartridge on the dispenser 2 Water filter needs replacement once six months or using water filter IV FILTER DU FILTER 3 Water F
10. control The time needed to supply water resets to the pre test setting Diagnosis TABLE STAGE ITEMS INDICATOR REMARKS 1 HEATER 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 motor is moving Check if Ice Bin is full or not 3 HALL IC I If Ice bin is full the motor and heater are off and on stand by until Ice bin is empty You can confirm HALL IC detection of start 4 HALL IC II position 5 VALVE Two seconds after detection of start position you can confirm that valve is on 6 Baca Return to Status prior to Five seconds after fifth stage is completed TEST MODE The icemaker resets to initial status 7 3 DEFECT DIAGNOSIS FUNCTION 7 3 1 ERROR CODES shown on Ice Maker water supply control panel NO DIVISION Icemaking Sensor malfunction INDICATOR Mark time to supply CONTENTS REMARKS Display switch operates properly Make sure that the wire Open or short circuited wire each sensor is connected 27 8 DESCRIPTION OF FUNCTION amp CIRCUIT OF MICOM 8 1 FUNCTION 8 1 1 Function 1 When the appliance is plugged in it is set to 37 F for Refrigerator and O F for freezer You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button 2 When the power is initially applied or restored
11. signal isn t over 115 seconds during BLDC FAN motor operating Communication Error between Micom of Main PCB and Display Micom Poor BLDC Motor connection DRIVE IC and TR Poor Communication connection Poor TR of Transmitter and Receiver 32 8 1 16 TEST Mode 1 The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of an error The test mode is operated by pressing two buttons at Display panel While in the test mode the function control button is not recognized but the recognition tone sounds After exiting the test mode be sure to reset by unplugging and then plugging in the appliance If an error such as a sensor failure is detected while in the test mode the test mode is cleared and the error code is displayed O A 6 While an error code is displayed the test mode will not be activated Table 1 Function Test TEST Switch once in TEST MODE3 See page 39 MODE OPERATION FUNCTION REMARKS Push FREEZER KEY and 1 Continuous operation of the LOCK KEY at the same COMPRESSOR and the Freezer fan TEST1 time over 5 deconds OR 2 Stepping DAMPER OPEN Push Test Switch in the 3 Defrosting HEATER OFF main Board once See 4 DISPLAY LED all ON page 39 Push FREEZER KEY and 1 Continuous operation of the TEST LOCK KEY at the same COMPRESSOR and the Freezer fan time over 5 seconds in 2 Stepping DAMPER CLOS
12. times each for 1 2 seconds These tones repeat every 30 seconds 3 The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds Freezer Door Closed Closed Closed or Refrigerator Door 3 Times 3 Times 3 Times 3 Times Buzzer 30 sec 30 sec 30 sec Within 1 min 1 min 30 8 1 14 Defrosting removing frost 1 Defrosting starts each time the COMPRESSOR running time reaches 7 hours 2 For initial power on or for restoring power defrosting starts when the compressor running time reaches 4 hours 3 Defrosting stops if the sensor temperature reaches 46 4 F 8 C or more If the sensor doesn t reach 46 4 F 8 C in 2 hours the defrost mode is malfunctioning Refer to the defect diagnosis function 8 1 15 4 Defrosting won t function if its sensor is defective wires are cut or short circuited 8 1 15 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 Freezer Display 0 17 E ar o ar ar o ROOM TEMPERATURE Le FW Wc ow DOOR ALARM 1 4 OF LT noe 2 gs LILI e LOCK ae G HOLD 3SECS DISPENSER amp BUTTON LED check function If simulta
13. Defrost Sensor and FUSE M Figure 15 The Defrost Sensor works to defrost automatically It is attached to the metal side of the Evaporator and senses its 3 6 2 Freezer Compartment Lamp temperature At 72 C it turns the Defrost Heater off 1 Unplug refrigerator power cord form outlet Fuse M is a safety device for preventing over heating of 2 Using a flat instrument gently pry the lamp cover the Heater when defrosting loose in the front as shown Rotate downward to 1 Pull out the grille assembly Figure 12 remove the rear tabs 2 Separate the connector with the Defrost Control 3 Make sure the bulb is cool to the touch Turn the assembly and replace the Defrost Control assembly bulb counterclockwise to remove after cutting the Tie Wrap Figure 13 4 Replace with a new 60 watt appliance bulb 5 Insert tabs on back of cover into slots in freezer ceiling Push cover up to snap front into place GRILLE ASSEMBLY DEFROST CONTROL ASSEMBLY BN HEP 3 7 CONTROL BOX REFRIGERATOR 1 First remove all shelves in the refrigerator than remove D D Figure 13 Figure 12 Figure 16 the Refrigerator control Box by loosening 2 screws 2 Remove the Refrigerator Control Box by pulling it downward 3 Disconnect the lead wire on the right position and separate the lamp sockets 3 8 MULTI DUCT 1 Remove the upper and lower Caps by using a flat sc
14. E TEST MODE 1 OR Push 3 Defrosting HEATER OFF TEST Switch oncein TEST 4 DISPLAY LED shows no 2 MODE1 See page 39 Push FREEZER KEY and 1 COMPRESSOR and the Freezer fan Reset if the TEST3 LOCK KEY at the same OFF Temperature of the time over 5 seconds in 2 Stepping DAMPER CLOSE Defrosting Sensor is TEST MODE 2 OR Push 3 Defrosting HEATER ON 46 F 8 C or more TEST Switch once in TEST 4 DISPLAY LED shows no 3 MODE2 See page 39 Push FREEZER KEY and LOCK KEY at the same overs caede in Reset to the previously setting The compressor will RESET TEST MODE 3 OR Push Before TEST MODE Start after a 7 minute Delay Bere 8 2 PCB FUNCTION 8 2 1 Power Circuit 1 Power is supplied to the control board at pin1 and of connector 1 CONT POWER 2 34 8 2 2 Load Fan amp Open Door Detection Circuit 1 Load Drive Condition Check CON3 ee 0 us i 0 T4 G5N8 1 WATER PILOT VALVE eine A RY6 To measure outputs of the control board check voltages between the pins for the following components Circuit Pin Number Pin Number Output Voltage I Maker Pilot Valve Con3 Pin3 Con3 Pin2 115 VAC Lamp R Cons 9 Cons Pin2 115 VAC Barrier Heater Con3 Pin8 Con3 Pin2 115 VAC Lamp F Cons Pin7 Cons Pin2 115 VAC Def Heater Con3 Pin10 Con3 Pin2 115 VAC Water Pilot Valve Con3 Pin11 Con3 Pin2 115 VAC Compressor Con3 Pin12 Con3 Pin2 115 VAC
15. EMENT FUNNEL REPLACEMENT 9 SUB PWB FOR DISPENSER DUCT DOOR REPLACEMENT ICE CORNER DOOR REPLACEMENT ICE MAKER ASSEMBLY Se es sun sed nee eee tes iii nene 10 AUGER MOTOR COVER AUGER MOTOR REPLACEMENT 2 11 DOC DO ee 12 HOW REMOVE AND REINSTALL THE PULLOUT DRAWERL 13 16 A ADJUSTMENT a sane i a a a S 17 18 e6 oes ee e P S 17 a i 17 OLP OVERLOAD PROTECTOR Li k eect coisa orig r ES US 18 TO REMOVE THE OVER PTO bs carcasses ii S i sober 18 5 CIRCUIT DIAGRAM e n 19 o TROUBLE SHOOTIN G M 20 24 COMPRESSOR AND ELECTRIC 20 BG eee Imo 21 SERVICE DIAGNOSIS CHAR ppe 22 a galt ge 16 49 B gt E r PPP 23 24 7 OPERATION PRINCIPLE amp REPAIR METHOD OF ICEMAKER 25 27 8 DESCRIPTION
16. ER G is poor DEFROSTING forced DEFROSTING TEMPERATURE FUSE Replace disconnection TEMPERATURE FUSE Door liner damaged Replace Door liner Connection is poor Check EVAPORATOR connection and wire of MAIN PWB CONNECTOR DEFROST SENSOR Replace DEFROST poor SENSOR HEATER RELAY is poor Replace RY4 of MAIN 2 If DRAIN PIPE is Check DRAIN PIPE DRAIN PIPE is blocked Remove ice and blocked impurities Check HEATER PLATE resistance 3 If ice remains after Make sure that Connection is poor Reassemble the DEFROSTING DEFROST SENSOR is DEFROST SENSOR connected Make sure that DOOR does not close FREEZER properly REFRIGERATOR Replace GASKET DOOR is closed 40 8 4 MAIN PWB ASSEMBLY AND PARTS LIST 8 4 1 Main PWB Assembly m Connector7 Connector6 Connector5 Connector4 Only when program is changed this connector7 must be used for downloading program to be changed r Connector1 Connector2 Connector3 44 8 4 2 Dispenser Drive PWB Assembly
17. OF FUNCTION CIRCUITS amp ERROR 28 42 9 EXPLODED VIEW amp REPLACEMENT PARTS LIST nm 43 SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator 1 Unplug the power before handling any elctrical componets Check the rated current voltage and capacity Take caution not to get water near any electrical components Use exact replacement parts Remove any objects from the top prior to tilting the product 1 SPECIFICATIONS 21 cu ft 25 cu ft ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN Side Rounded VEGETABLE TRAY Opaque Drawer Type DIMENSIONS inches 35 3 4 X 30 x 69 3 4 WXDXH 21cu ft COMPRESSOR Recipro 35 3 4 X 34 1 4 X 69 3 4 WXDXH 25cu ft EVAPORATOR Fin Tube Type 302 58 21cu ft CONDENSER Wire Condenser NET WEIGHT pounds 324 18 25cu ft REFRIGERANT R 134a 125 g COOLING SYSTEM Fan Cooling LUBRICATING OIL 15010 280 ml TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE SHEATH HEATER Full Automatic REFRIGERATOR 60 W 2EA DEFROSTING SYSTEM Heater Defrost FREEZER 60 W 1EA DOOR FINISH Embossed Metal VCM Stainless HANDLE TYPE Bar INNER CASE ABS Resin INSULATION Polyurethane Foam DIMENSIONS
18. Out Plate Front R Door L Door Heater Con2 Pind Cons Pin2 115 VAC NOTE When the door of the freezer refrigerator is left open for 7 minutes or longer the lamp of the freezer refrigerator turns 2 1 Freezing compartment fan MOTOR OFF 2V or less MOTOR ON 13V 15V 35 2 2 Machine compartment fan MOTOR OFF 2V or less MOTOR ON 13V 15V 2 3 Icing compartment fan MOTOR OFF 2V less MOTOR ON 13V 15V 36 3 Open Door Detection Circuit Check CON4 REFRIGERATOR DOOR SWITCH CON6 B FREEZER DOOR 6 SWITCH Measurement Pin 10 amp 11 of con4 Ref Door Freezer Pin 5 amp 6 of Fre Door Refrigerator Door CONS CON 10 F SENSOR M RT SENSOR 2 b R SENSOR ICING SENSOR D SENSOR RESISTANCE OF FREEZER Icing RESISTANCE OF REFRIGERATOR amp SENSOR DEFROST SENSOR amp ROOM SENSOR 700 14 F 5 8 710 60 F TEMPERATURE 40 108 FI 507 122 The resistance of the SENSOR has 5 common difference Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature This delay is necessary due to sensor response speed o o o o _87 8 2 4 Refrigeration Compartment Stepping Motor Damper Circuit A reversible DC motor is used to open and close the damper To open the damper push test button once To close the damper push te
19. Repair Clinic LG LFX25960ST Parts REFRIGERATOR CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LFX25960ST LFX21960ST COLOR TITANIUM LFX25960SW LFX21960SW WESTERN BLACK LFX25960SB LFX21960SB SUPER WHITE LFX25960TT LFX21960TT STAINLESS CONTENTS SAFETY PRECAUTIONS 2 1 daelje 1 9 3 2 PARTS IDENTIFICATION e X SR 4 DISASSEMBEN Y 5 13 REMOVING AND REPLACING REFRIGERATOR DOORS esses nennen asas saaa nnns nnne sinn aaa aaa aaa 5 B9 9 MMC P P PPP p 6 7 TO REMOVE THE DISPENSER 7 peg i e 7 PAN AND FAN MOTOR EVAPOrATOT simsai iais ae ai a ii a ess eder a y ICE FAN SCROLL ASSEMBLY REPLACEMENT ed aies smt i Ei 8 DEFROST CONTROLER a oe 8 E P PE Prep PPS 8 CONTROL BOX REFRIGERMATOR ai a ia ai i i ia Ei 8 LET I arenose aaa aa seses i a o sa a ao al i S a i a iso S a pa 9 MAIN PWB DISPLAY PWB REPLAC
20. To operate LINE and SERVICE press and hold the Fill Key for 3 seconds The icemaker will run through 3 stages Harvest Fill Icemaking VV VU OV OU Test Mode 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 icemaker control EJECTOR Automatic Cube Size N Shut off Arm Indicator Light Cube Size Selection Button Switch 25 7 2 ICE MAKER FUNCTIONS 7 2 1 Icemaking Mode 1 Icemaking refers to the freezing of supplied water in the ice tray Complete freezing is assured by measuring the temperature of the Tray with Icemaking SENSOR 2 Icemaking starts after completion of the water fill operation 3 The Ice Making function is completed when the sensor reaches 19 F 7 C 55 minutes after starting NOTE After Icemaker Power is ON the Icemaker heater will be on for test for 6 sec 7 2 2 Harvest Mode 1 Harvest Ice removing refers to the operation of dropping ices into the ice bin from the tray when icemaking has completed 2 Harvest mode 1 The Heater is ON for 30 seconds then the motor starts 2 The feeler arm senses the quantity 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 x If the EJECTOR does not rotate once within 5 mi
21. d of refrigerant 15 not heard and there 15 no frost 28 Equal to ambient temperature No pressure in the high pressure part of the compressor 6 4 1 SEALED SYSTEM DIAGNOSIS Not Cooling Complaint All components operating No airflow problems Not frosted up as a defrost problem problem has been isolated to sealed system area Frost Partial Pattern Equalization Test Equalization Test Very Fast Very Slow Very Slow Fast Very Fast Inefficient Compressor Complete Restriction Partial Restriction Condenser Cap Tube Temperature Sound Hotter than Normal Room Temperature None to Weak Air Low Side Loss of Change Leak Compressor Not Pumping Trace of Oil No Undercharge The equalization test is trying to restart a compressor using a start kit after it has been operating 24 7 OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 7 1 OPERATION PRINCIPLE 7 1 1 Operation Principle of IceMaker e Adjusts EJECTOR to Start Position with power on Start Position Icemaking Mode Harvest Mode Park Position Waits until water becomes ICE after starting the icemaking operation Runs MOTOR to drop ice from the tray into the ICE BIN During harvest mode check if the ice bin is full Reaches Start Position Performs Ice Making Mode after supplying water by operating the SOLENOID in ICE VALVE
22. h temperature section front part e Set the control to Recommended position e Set the control to Warm position e Seal liquid foods with wrap e Put in foods after they have cooled down e Don t open the door too often and close it firmly e Wipe moisture with a dry cloth It will disappear in low temperature and humidity Fill up the gap Adjust the Leveling Screw and position the refrigerator in a firm place e Remove the objects Fix the Drip Tray firmly in the original position Place the cover in its original position Clean the door gasket Position in a firm place and level the Leveling Screw Make sure food stored in shelves does not prevent the door from closing Clean the inside of the unit Wrap foods that have a strong odor New products smell of plastic but this will go away after 1 2 weeks Check Components of the defrosting circuit Perform sealed system repair Replace the Thermistor 6 4 REFRIGERATION CYCLE V Troubleshooting Chart PARTIAL LEAKAGE COMPLETE LEAKAGE STATE OF THE UNIT Freezer compartment and Refrigerator don t cool normally Freezer compartment and Refrigerator don t cool normally STATE OF THE EVAPORATOR Low flowing sound of Refrigerant is heard and frost forms in inlet only Flowing sound of refrigerant is not heard and frost isn t formed TEMPERATURE OF THE COMPRESSOR A little higher than a
23. ilter icon turn on to tell you need to replace di alis MONTH MONTH the filter soon 5 P HOLD3SECS 4 After replacing the filter press and hold the lock button more than 3 seconds Water Filter icon turn off with reset status 28 8 1 5 Ice Plus selection Please select this function for quick freezing Function is repeat Ice Plus Icon whenever pressing Ice Plus button Ice Plus function automatically turns off after a fixed time passes 8 1 6 Dispenser use selection You can select water or ice Select water crushed ice or ice cubes by cycling through the selections when pressing the DISPENSER button Hold your cup in the dispenser for a few seconds after dispensing ice or water to allow the last pieoes of ice or drops of water to fall into the cup When after initially establ ishing the water comes out the water tank inside fills and until at the time of quality the hour is caught Pressing Switch EE oaa 8 1 7 DISPENSER LIGHT Whenever pressed the LIGHT button DISPLAY is changed as belows 7 7 D 2 Normal status When dispenser is operated DISPENSER LIGHT is ON AUTO status Detecting the lighting of room by LIGHT SENSOR DISPENSER LIGHT is on and off automatically ON status DISPENSER LIGHT is on continuously 8 1 8 CONTROL OF FREEZER FAN MOTOR 1 Freezer fan motor has high and standard speeds 2 High speed is used at power
24. ion The compressor includes overload protection The PTC starter and OLP overload protector are attached to the outside of the compressor Since the compressor is manufactured to tolerances of 1 micron and is hermetically sealed in a dust and moisture free environment use extreme caution when performing repairs 4 1 3 Note for Usage 1 Be careful not to allow over voltage and over current 2 If compressor is dropped or handled carelessly poor operation and noise may result 3 Use proper electric components appropriate to the Particular Compressor in your product 4 Keep Compressor dry If the Compressor gets wet in the rain or a damp environment and rust forms in the pin of the Hermetic Terminal poor operation and contact may result 5 When replacing the Compressor be careful that dust humidity and soldering flux don t contaminate the inside of the compressor Dust humidity and solder flux contaminate the cylinder and may cause noise improper operation or even cause it to lock up 4 2 PTC STARTER 4 2 1 Composition of PTC Starter 1 PTC Positive Temperature Coefficient is a no contact semiconductor starting device which uses ceramic material consisting of BaTiOs 2 The higher the temperature is the higher the resistance value These features are used as a starting device for the Motor 4 2 2 Role of PTC Starter 1 The PTC is attached to the Sealed Compressor and is used for starting the Compressor M
25. liquid If liquid such as oil or water enters the PTC PTC materials may fail due to breakdown of their insulating capabilities 4 If the exterior of the PTC is damaged the resistance value may be altered This can cause damage to the compressor and result in a no start or hard to start condition 5 Always use the designed for the compressor and make sure it is properly attached to the compressor Parts may appear physically identical but could have different electrical ratings Replace parts by part number and model number Use only approved substitute parts 247 4 3 OLP OVERLOAD PROTECTOR 4 3 1 Definition of OLP 1 OLP OVERLOAD PROTECTOR 15 attached to the Compressor and protects the Motor by opening the circuit to the Motor if the temperature rises and activating the bimetal spring in the OLP 2 When high current flows to the Compressor motor the Bimetal works by heating the heater inside the OLP and the OLP protects the Motor by cutting off the current flowing to the Compressor Motor 4 3 2 Role of the OLP 1 The OLP is attached to the Sealed Compressor used for the Refrigerator It prevents the Motor Coil from being started in the Compressor 2 For normal operation of the OLP do not turn the Adjust Screw of the OLP in any way OVERLOAD PROTECTOR cross section Part 4 Customer number D Base phenolic ne UL 94 V 0 rated ate code Movable arm support plated s
26. mbient temperature Equal to ambient temperature REMARKS Refrigerant level is low due to a leak e Normal cooling is possible by restoring the normal amount of refrigerant and repairing the leak No discharging of Refrigerant e Normal cooling is possible by restoring the normal amount of refrigerant and repairing the leak PARTIAL CLOG O O G G m O UJ lt J C 4 MOISTURE CLOG Freezer compartment and Refrigerator don t cool normally Freezer compartment and Refrigerator don t cool Cooling operation stops periodically Flowing sound of refrigerant is heard and frost forms in inlet only Flowing sound of refrigerant is not heard and frost isn t formed Flowing sound of refrigerant is not heard and frost melts A little higher than ambient temperature Equal to ambient temperature Lower than ambient temperature Normal discharging of the refrigerant The capillary tube is faulty e Normal discharging of the Refrigerant e Cooling operation restarts when heating the inlet of the capillary tube 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 temperature Low pressure at high side of compressor due to low refrigerant level NO COMP RESSION NOISS3HdlNOO 11119334 No compressing operation Flowing soun
27. n Step 5 First Remove the gear from the left side first by releasing the tab behind the gear place a screwdriver between the gear and the tab and pull up on the gear Second Remove the center rail Third Remove the gear from the right side by following the same steps for the left side NOTE THIS TAB MUST BE PUSHED IN TO RELEASE THE GEAR 13 3 20 2 Follow Steps to Reinstall Step 1 Reinstall the right side gear into the clip Step 2 Insert the rail into the right side gear Gears do not Step 3 Insert the rail into the left side gear and insert the need to be perpendicular to each other gear into the clip Step 4 The rail system will align itself by pushing the rails Step 5 Reinstall the freezer door by inserting the rail tabs all the way into the freezer section into the guide rail Pull the rails back out to full extension Step 6 Reinstall the two screws into the guide rails Step 7 Reinstall the lower basket and close the freezer one from each side door 14 3 20 WATER VALVE DISASSEMBLY METHOD 3 21 FAN AND FAN MOTOR DISASSEMBLY METHOD 1 Turn off the water Then separate the water line from the 1 Using a short screwdriver loosen one SCREW in valve DRAIN PIPE ASSEMBLY and one connected to the MOTOR COVER MOTOR COVER 2 Pull and separate the FAN ASSEMBLY and MOTOR 2 Separate the Mechanical Cover and Valve Screw turning counterclockwise based on the MOTOR SHAFT
28. neously pressing Ice Plus button and freezing temperature adjustment button for a second display LED graphics on If releasing the button the LED graphic displays the previous status ol ERROR CODE display panel Error Detection Category Normality Freezer Temperature Error Display Ref Temperature Error Generation Factors None Remark Normal operation of Display Freezer Sensor Error Refrigerator Sensor Error Defrosting Sensor Error Short or Disconnection of Freezer Sensor Short or Disconnection of Refrigerator Sensor Short or Disconnection of Defrosting Sensor Icing Sensor Error Poor Defrosting Short or Disconnection of Icing Sensor Even though it is passed 1 hour since then Defrosting if Defrosting sensor is not over 8 C it 15 caused Each Sensor have to check disconnection Temperature Fuse Disconnection Heater disconnection DRAIN Jam Poor Relay for Heater Abnormality of Abnormality of BLDC FAN Motor for Freezer It is caused when F B signal isn t over 115 seconds during BLDC FAN motor operating It is caused when F B signal isn t over 115 seconds during BLDC FAN motor operating Poor BLDC Motor connection DRIVE IC and TR Poor BLDC Motor connection DRIVE IC and TR 10 Abnormality of BLDC FAN Motor for Mechanic Room Communication Er Error BLDC FAN Motor for Ice Making CO It is caused when F B
29. nutes 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 return to normal mode 7 2 3 Fill Park Position 1 Once a normal harvest mode has been completed the water solenoid will be activated 2 The amount of water is adjusted by pressing the Fill Key repeatedly This changes the time allowed for fill as illustrated in the table below Water supply amount TABLE STAGE TIME TO SUPPLY INDICATIONS REMARKS The water amount will vary depending 2 5 5 sec on the water control Switch setting as FIRST STAGE well as the water pressure of the connected water line 26 7 2 4 Function TEST 1 This is a forced operation for TEST Service cleaning etc It is operated by pressing and holding the Fill Key for 3 seconds 2 The test works only in the Icemaking Mode It cannot be entered from the Harvest or Fill mode 3 Caution If the test is performed before water in the icemaker is frozen the ejector will pass through the water When the Fill mode begins Stage 4 unless the water supply has been shut off added water will overflow into the ice bin If the control doesn t operate normally in the TEST mode check and repair as needed 4 After water is supplied the normal CYCLE is followed icemaking Harvest Park Position Fill 5 Five seconds after Stage 5 is completed the Ice Maker returns to MICOM
30. otor 2 The compressor is a single phase induction motor The starting operation the PTC allows current flow to both the start winding and main winding 4 2 3 PTC Applied Circuit Diagram e Starting Method for the Motor eooo OVERLOAD PROTECTOR O COMPRESSOR MOTOR C SEALED TERMINAL L1 PTC STARTER Resistance Starter Capacitor Running 4 2 4 Motor Restarting and PTC Cooling 1 It requires approximately 5 minutes for the pressure to equalize before the compressor can restart 2 The PTC device generates heat during operation Therefore it must be allowed to cool before the compressor can restart 4 2 5 Relation of PTC Starter and OLP 1 If the compressor attempts to restart before the PTC device is cooled the PTC device will allow current to flow only to the main winding 2 The OLP will open because of the over current condition This same process will continue 3 to 5 times when the compressor attempts to restart until the PTC device has cooled The correct OLP must be properly attached to prevent damage to the compressor Parts may appear physically identical but could have different electrical ratings Replace parts by part number and model number Use only approved substitute parts 4 2 6 Note for Using the PTC Starter 1 Be careful not to allow over voltage and over current 2 Do not drop or handle carelessly 3 Keep away from any
31. ours the freezer will be controlled at the lowest temperature After 24 hours or if the Ice Plus key is pressed again the freezer will return to its previous temperature 5 During the first 3 hours 1 Compressor and freezer fan HIGH RPM run continuously 2 If a defrost cycle begins during the first 90 minutes of Ice Plus the Ice Plus cycle will complete its cycle after defrosting has ended If the defrost cycle begins when Ice Plus has run for more than 90 minutes Ice Plus will run for two hours after the defrost is completed 3 If Plus is pressed during defrost Ice Plus LED is on but this 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 controlled at the lowest temperature 8 1 12 FREEZER amp REFRIGERATOR LAMP AUTO OFF 1 To avoid heat damage caused by the lamp it is turned off automatically when the refrigerator door is open for more than 7 minutes 8 1 13 Alarm for Open Door 1 This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened 2 One minute after the door is opened the buzzer sounds three
32. ove Lift top hinge 8 free of hinge lever latch 9 A CAUTION When lifting hinge free of latch be careful that door does not fall forward 7 Lift door up from middle hinge pin and remove door 8 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 3 2 Disconnect door switch wire harness 2 Remove cover 3 Disconnect wire harness 5 Remove the grounding screw 6 4 Rotate hinge lever 7 clockwise and remove Lift top hinge 8 free of hinge lever latch 9 CAUTION When lifting hinge free of latch be careful that door does not fall forward 5 Lift door up from middle hinge pin 10 and remove door 6 Place door inside facing up down onto a non scratching surface Figure 2 Figure 3 3 2 Door Gasket Removal 1 Remove door frame cover Starting at top of cover and working down snap cover out and away from door Frame Cover Handle Figure 1 2 Remove gasket bracket clips There are two clips on each door Start bracket removal near one of the middle clips 1 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 Gasket Door Bracket Clip Frame Flat Tip Screwdriver Gasket
33. r CONNECTOR connection 16 poor TRANS FUSE is open COMPRESSOR locked or blocked OLP PTC is poor COMPRESSOR RELAY IS poor THE CONNECTING WIRE is poor Refrigerant leakage FAN MOTOR is poor CONNECTING WIRE is poor DEFROSTING is poor SENSOR RESISTANCE IS poor Door liner damaged Replace Main PWB Replace Main PWB Reconnect CONNECTOR Replace Main PWB Replace OLP PTC Replace MAIN PWB Check the connection of the black wire of the MAIN PWB CONNECTOR CONS Replace the leaking part and replace any lost refrigerant Replace the FAN MOTOR Certify the MOTOR and the connection of the wire of the MAIN PWB CONNECTOR CON4 See DEFROSTING is poor Replace SENSOR Replace door liner PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION COOLING is 1 If FREEZER Check is FREEZER Make sure the DOOR isattached poor TEMPERATURE is TEMPERATURE is too TEMPERATURE normal low 5 too low 2 If amount of cool air Make sure that the FAN MOTOR is poor Replace FAN MOTOR from FAN MOTOR is amount and speed of cool sufficient air are sufficient by touching the check supplied on the REFRIGERATOR EVA frozen DEFROSTING is poor Passage of cool air is Remove impurities blocked 3 Door Line contact Check door seal when door is closed DEFROSTIN NO 1 If HEATER emits heat USE TEST MODES3 HEATER disconnection Replace HEAT
34. rewdriver and remove 2 screws Figure 17 2 Disconnect the lead wire on the bottom position Figure 17 3 9 MAIN PWB 2 Remove the PWB cover 3 Disconnect wire harness and replace the main PWB in the reverse order of removal 3 10 DISPENSER 1 Disconnect funnel and button assembly by pulling down and forward 2 Remove display frame assem between a display frame assembly and door with a flat blade screwdriver and pulling it forward The cover dispenser is attached with a hook bly by making a gap 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 11 DISPLAY PWB REPLACEMENT 1 Pull up and out on the dispenser cover to remove 3 12 FUNNEL REPLACEMENT 1 Pull up and out on the dispenser cover to remove 2 Disconnect the wire harness 3 Replace in reverse order IT 3 13 SUB PWB FOR WORKING DISPENSER 3 15 ICE CORNER DOOR REPLACEMENT 1 Loosen the screw on the sub PWB 1 Loosen the front screw as shown in the picture 2 Lift up the hinge with one hand 3 Pull out the Ice Corner Door with the other hand 2 Pull the sub PWB down 3 Disconnect the wire harness and replace the sub PWB in the reverse order of removal 3 16 ICEMAKER ASSEMBLY 1 Loosen two screw
35. s as shown in the first picture 3 14 DUCT DOOR REPLACEMENT 1 Pull up and out on the dispenser cover to remove 2 Disconnect the wire harness amp ground screw replace 2 Disconnect the wire harness thelcemaker assembly in the reverse order of removal 3 Remove the funnel 4 Replace in reverse order 3 It separates a ground connection screw 10 3 17 AUGER MOTOR COVER 1 After removing the icemaker remove the 5 stainless screws holding the auger motor cover shown in the picutres below 3 Disconnect wire harness of motor cover assembly There is a auger motor on the back as shown in the picture Auger Motor 11 3 18 HOW TO REMOVE A DOOR ICE BIN 1 Grip the handles as shown in the picture 12 3 19 HOW INSERT DOOR ICE BIN 1 Insert the Ice Bin slightly tilting it to avoid touching the Icemaker especially ice maker lever x Insert the ice bucket carefully avoid contacing the automatic shut off arm B re E 3 20 HOW REMOVE AND REINSTALL THE PULLOUT DRAWER 3 20 1 Follow Steps to Remove Step 1 Open the freezer door Step 2 Remove the lower basket Step 3 Remove the two screws from the guide rails one Step 4 Lift the freezer door up to unhook it from the rail from each side support and remove Pull both rails to full extensio
36. st button twice CONO 8 2 5 Dispenser Drive Circuit Circuit Pin Number Pin Number Output Voltage Auger Motor Con2 Pind Con2 Pin7 115 VAC Solenoid Cube Con2 Pin3 Con2 Pin7 115 VAC Pilot Water Valve Con2 Con2 Pin7 115 VAC Solenoid Dispenser Con3 Pin9 Con3 Pin3 115 VAC Dispenser Lamp Con3 Pin7 Con3 Pin3 115 VAC Heater Con3 Pin5 Con3 Pin3 115 VAC 38 8 3 TROUBLESHOOTING PROBLEM INDICATED BY CHECK CHECKING METHOD CAUSE SOLUTION POWER SOURCE poor COOLING is poor 1 The whole 2 DISPLAY LED NO COOLING FREEZER TEMPERATURE is incorrect 1 FREEZER REFRIGERATOR 2 If LAMP is dim 3 The connection of the MAIN PWB CONNECTOR 1 COMPRESSOR operate 2 If refrigerant is leaking 1 If FAN MOTOR operates 2 If DEFROSTING is normal 3 If SENSOR is normal 4 Door Line contact Check if FREEZER REFRIGERA TOR DOOR IS OPEN and check display Check visually Check connection of CONNECTOR USE TEST MODE forced COOLING If less than 7 minutes pass after compressor shuts off don t press the KEY and wait Measure the amount of frost sticking on EVAPORATOR and the surface temperature of the condenser pipe USE TEST MODE forced COOLING Check the amount of frost sticking on the EVAPORATOR of the Refrigerator SENSOR Check the seal when the door is closed 39 POWER SOURCE is poor Applied voltage erro
37. teel 3 Stationary contact support plated steel 4 Heater support plated steel 5 Heater resistance alloy 6 Disc thermostatic alloy Movable arm spring temper copper alloy Contact movable silver on copper Contact stationary silver on copper Slug plated steel Cover polyester UL 94V 0 rated 2 Pin connector plated copper alloy To engage 2 33 2 66 mm dia pin 3 Quick connect terminal brass conforms to UL 310 MEMA DC 2 DIN 46344 Electrical Si Physical characteristics termination part number part number Figure 19 4 4 TO REMOVE THE COVER 1 Remove the Cover Back M C 2 Disconnect two housing upper side of comp connected in 3 Loosen two screws on comp base 4 Use a L shaped flap tool to pry off the cover b Assembly in reverse order of disassembly 18 5 CIRCUIT DIAGRAM L O gt CC gt DISPENSER aw PWE ASSEMBLY 19 6 TROUBLESHOOTING 6 1 COMPRESSOR AND ELECTRIC COMPONENTS p S Remove PTC Starter Rated Voltage YES TU UE from Compressor and 1096 measure voltage between Terminal C of Compressor and Terminal 5 or 6 of PTC YES No Voltage OLP disconnected Replace OLP gt NO Check connection condition Reconnect in acceptable range power supply needs to be Applied voltage isn t Advise customer that 115V 10 checked by an electrician 5
38. ting of OLP Lack of capacity Wire is open or shorted Check wiring circuit doesn t run Replace indicated component Check Fan Motor Coil is shorted or open Heavy frost buildup on Check current flow in Replace EVAPORATOR the following Open indicated component components Sensor Fuse M Check current flow in Re place the Defrost Heater Defrost Heater 21 6 3 SERVICE DIAGNOSIS CHART COMPLAINT No Cooling Cools poorly Food in the Refrigerator is frozen Condensation or ice forms inside the unit Condensation forms in the Exterior Case There is abnormal noise Door does not close well Ice and foods smell unpleasant POINTS TO BE CHECKED Is the power cord unplugged from the outlet e Check if the power switch is set to OFF e Check if the fuse of the power switch is shorted Measure the voltage of the power outlet e Check if the unit is placed too close to the wall e Check if the unit is placed too close to the stove gas cooker or in direct sunlight Is the ambient temperature too high or the room door closed e Check if food put in the refrigerator is hot Did you open the door of the unit too often or check if the door is sealed properly e Check if the Control is set to Warm position s food placed in the cooling air outlet e Check if the control is set to colder position Is the ambient temperature below 41 F 5 C
39. to order part not the position number 5 0 4 Si Ne id N Fi 49 LG Electronics Inc P No 3828JL8795A APR 2006 Printed in Korea
40. up for Ice Plus 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 or load corresponding operation Ice Plus Normal speed 2400RPM General working conditions 5 Fan motor stops when refrigerator or freezer door opens 8 1 9 Cooling Fan Motor 1 The cooling fan is switched ON and OFF in conjunction with the compressor 2 The cooling fan runs at a single speed 3 The Failure sensing mathod is the same as in the fan motor of the freezing fan motor refer to failure diagnosis function table for failure display 8 1 10 Icing Fan 1 The Icing Fan is controlled by the the sensor on the top of the ice room 2 The Failure sensing mathod is the same as in the fan motor of the freezer refer to failure diagnosis function table for failure display 99 8 1 11 Ice Plus 1 The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice 2 Whenever selection switch is pressed selection release the LED will turn ON or OFF 3 If there is a power outage and the refrigerator is powered on again Ice Plus will be canceled 4 To activate this function press the Ice Plus key and the LED will turn ON This function will remain activated for 24 hrs The first three hours the compressor and Freezer Fan will be ON The next 21 h
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