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Refrigerator

1. LMX21981 xx Page 2 TRAINING MANUAL 2198 1 xx REFRIGERATOR E EXPLODED VIEWS continued lt lt lt LMX21981 xx Page 5 TRAINING MANUAL LMX21981 xx REFRIGERATOR a gt TEMPERATURE RESISTANCE CHART SENSOR DEFROST SENSOR amp ROOM SENSOR SEES lt lt lt LMX21981 xx Page 74 TRAINING MANUAL Four Door Refrigerator Fall 2008
2. 89 e Remove the grille assembly in the freezer Unplug the defrost control assembly Cut the tie wrap that holds it in place Remove and replace the assembly Secure it with a new tie wrap Plug in the new assembly and replace the grille In the two photos to the left the orange leads are the defrost sensor The blue and brown leads are the fuse link u 2 1981 xx 50 TRAINING MANUAL IMX21981xx REFRIGERATOR DEFROST CONTROL ASSEMBLY continued The orange leads go to the defrost sensor on CONNECTOR 6 Using your ohmmeter read the resistance of the sensor to determine the temperature In this example 60 5 indicates 5 F See thermistor chart page 74 THERMISTOR TIPS The icemaker cycles at 16 F The ice room fan cycles on at 6 F and off at 2 F The defrost cycle terminates at 46 F 8 C There is no defrost cycle if the internal temperatures are above 46 F If a sensor fails The refrigerator sensor cycles the damper and evaporator fan every fifteen minutes while the error code Er rS is displayed The freezer sensor cycles the compressor evaporator fan motor and condenser fan motor every fifteen minutes while the error code Er FS is displayed The ice room sensor cycles the ice room fan every fifteen minutes while the
3. HTR R DOOR HEATER WATER PILOT VALVE QR MAKER PILOT VALVE APPLY FOR AC LAMP MODEL L DOOR HEATER To measure autputs of the control board check voliages between the pins for the following components 2 3 Machine compartment tan J in of Plot Valve Con 3 115 rac MOTOR OFF 3V or less MOTOR ON 109 147 Water Pilot Valve Gon3 Pini Cona Pin 115 2 1 APPLY For AC Lamp 2 2 Freezing compartment fan 2 4 Icing compartment fan MOTOR ON 14 LMX21981 xx Page 62 TRAINING MANUAL LMX21981 xx REFRIGERATOR z a OPEN DOOR DETECTION CIRCUIT CHECK 3 Open Door Detection Circuit Check CON4 CON6 5 REFRIGERATOR DOOR 6 FREEZER DOOR 12 SWITCH 6 SWITCH Measurement Pin 11 amp 12 of con4 Ref Door Location Pin 5 amp 6 Fre Door D SENSOR R SENGOR IC MICOMI RT SENSOR CONIOI 1 20 ICI0I een DISPLAY or ICING SENSOR is located on tne Display The upper circuit reads refrigerator temperature freezer temperature Icing sensor temperature and defrost sensor temperature for defrosting and the indoor temperature for compensating for the surrounding temperature into MICOM Opening or short
4. INVHOVICG LOEFCEZFZ3IN 2237 ama TRAINING MANUAL Page 57 LMX21981xx 21981 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 2 The test mode is operated by pressing test button at main PCB controller 3 While in the test mode the function control button is not recognized but the recognition tone sounds 4 After exiting the test mode be sure to reset by unplugging and then plugging in the appliance 5 If an error such as a sensor failure is detected while the test mode the test mode is cleared and the error code is displayed 6 While an error code is displayed the test mode will not be activated Push test button one time 1 operation of the COMPRESSOR at main PCB controller and FAN Freezer Condenser Icing 2 Stepping DAMPER OPEN 3 Defrosting HEATER OFF 4 DISPLAY LED all ON Push Test button one in 1 Operation of the COMPRESSOR TEST PCB MODE1 FAN Freezer Condenser cing 2 Stepping DAMPER CLOSE 3 Defrosting HEATER OFF 4 DISPLAY LED shows 22 Push Test button one in 1 The COMPRESSOR and the Reset if the TEST PCB MODE2 FAN Freezer Condenser Icing OFF Temperature of the 2 Stepping DAMPER CLOSE Defrosting Sensor is 3 Defrosting HEATER ON 46 F 8 C or more 4 DISPLAY LED shows 33 Push Test button one in
5. 21981 DISPENSER DRIVE PWB ASSEMBLY ii Li CE Em Mm 2198 1 xx Page 6 TRAINING MANUAL 2 198 1 xx EXPLODED VIEWS 184 NT GA LMX21981 xx Page 67 TRAINING MANUAL LMX21981xx EXPLODED VIEWS continued TRAINING MANUAL Page 68 LMX21981xx LMX21981xx EXPLODED VIEWS continued 74 some models TRAINING MANUAL Page 69 LMX21981xx LMX21981xx EXPLODED VIEWS continued some models only for the service TRAINING MANUAL Page 70 LMX21981xx LMX2 1981 xx REFRIGERATOR EXPLODED VIEWS continued A F Ls SS hM m Gss 9A C H I ss e X m X lt um n 278A a SSS LMX21981 xx Page 71 TRAINING MANUAL 21981 EXPLODED VIEWS continued
6. Original or new parts may be used in or labe production sets improve Original parts may be used in early production sets only PA Cen New parts may he used in early or late production sets j TT inl TT 2 original parts where possible then stock new parts Change of material or dimension New paris ony may be used in or late production sets Addition TH See 5 Deletion Original paris only may be used in early production sets 7 Correction New paris may be used in late production sets only Stock orginal and new parts CHIEF ENGINEER M 72 7 Factory approvea 21981 Page 38 TRAINING MANUAL LMX21981xx New Part No of Condition P No of icemaker has changed Correction New Part No 5989 0001 mm 810 5999 800018 mm AEQ36756902 59850800016 mm 025755903 5999J80001D mE AEQ36756904 5999J80001E mm AEQ36756905 5989JB0001F AEQ36756906 Old part No aution 0 Use the new part number when ordering a replacement icemaker 0 Check for proper operation of the new icemaker by running the Test forced harvest Mode after installation Profitable Growth 2010 LMX21981xx ITEM Part Icemaker Assembly Kit Part No 5989JB0001A Loc No 600A 1 The stainless lever rolls from the middle of the icemaker
7. connection drive IC or data transmission Defective BLDC fan motor connection drive IC or data transmission Defective BLDC fan motor connection drive IC or data transmission Poor communication faulty transmission or reception of data 8888 Not a defect TRAINING MANUAL IMX21981xx REFRIGERATOR ERROR CODE Er rt The error code Er rt will show on the display at the beginning of the test mode If there is a defective ambient sensor reading Otherwise it will not be seen by the customer and does not affect normal operation of the refrigerator mr A LMX21981xx Page 60 TRAINING MANUAL IMX21981xx REFRIGERATOR PCB FUNCTION POWER CIRCUIT The secondary part of the TRANSFORMER Is composed of the power supply for the display the BLDC FAN Motor drive 15 5 Vpc the relay drive 12 Vpc and the MICOM IC 5 Voc The voltage for each part is as follows VAT is a part for preventing over voltage and noise When 250 V or higher power is applied the inside elements are short circuited and broken resulting in blowout of the fuse in order to protect the elements of the secondary part of the TRANSFORMER CONI I 77 2 198 xx Page 61 TRAINING MANUAL 2 198 1 xx POWER CIRCUIT continued VOLTAGE 115 Vac 12 15 5 LOAD FAN DOOR OPEN DETECTION CIRCUIT CON3
8. it II 2 The current icemaker does not have cross braces REFRIGERATOR Part Assembly Kit Part AEQ36756901 06 Loc No 600A FEATURE 1 The stainless lever rolls from the bottom of the icemaker 2 Three braces which cross the legs of the heater cover have been added Enhance Your Everyday TRAINING MANUAL LMX21981xx PILOT VALVE ASSEMBLY Housing LMX21981 xx Page 40 REFRIGERATOR Turn off the water Remove the water line from the valve by removing the release guard clip and pressing the collet release ring Separate the mechanical cover and remove the screw that holds the valve assembly to the refrigerator Separate the housing Pull out the valve Lay a dry towel on the floor and be ready to spill water from the filter line Remove the release guard clip and press the collet to separate the tube from the connector Allow the water to drain from the line until it is empty TRAINING MANUAL 2198 1 ICE AND WATER VALVES Remove the tilt drawer door bin Remove the valve access panel Reservoir tubing and valves Ice and water valves VV ate c X LMX21981xx Page 41 TRAINING MANUAL IMX21981xx REFRIGERATOR FAN and MOTOR DISASSEMBLY MOTOR COVER Using a short screwdriver loosen one screw in the drain pipe assembly another one connect
9. terminals amp shown on the R Door switch above NOTE Only 1 refrigerator door switch is shown in the wiring diagram There are two refrigerator door switches one for each door both wired as shown above Likewise in CON 6 pins 5 and 6 these brown BN wires connect the 2 freezer door switches on connectors F amp These are also 5 Vpc door monitoring switches LMX2 1981 xx Page 46 TRAINING MANUAL 21981 HOW WORKS continued Operationally the door monitoring switches are open when the doors are closed When doors are closed and monitoring switches for the refrigerator and freezer doors are open 5 Vpc will be measured across the control board terminals referenced above and 5 will be measured across the open terminals of the perception section of the door switches When the door or doors are open the switches will be closed When this occurs zero 0 Vpc will be measured across the door perception terminals on the control board and across the perception terminals of the door switches The LED section operates on 12 Vpcfrom CON 6 pins 15 14 and 15 Pin 15 PK is marked D this terminal is the ground reference for measuring the 12 Vpcin the LED section of the control board Pin 14 GY is marked E and is the 12 Vpcoutput to both LED Modules in the refrigerator and freezer sections Looking closely at the LED Modules you will see that E is connected to Pin 1 on the LED
10. Modules This RD lead is the 12 Vpc from the control board pin 14 GY Pin 2 on the LED Module is marked D from the control board and is a BK wire which is the ground reference from Pin 15 PK 12 Vpc should be present at ALL times on pins 1 and 2 RD to BK on both LED modules This 12 Vpc will be used to operate the LEDs in each module when the signal voltage arrives on Pin 5 WH Pin 15 SB on CON 6 of the main power board is a 1 2 Vpc output going to each door switch in the refrigerator and freezer sections The 2 switch in each door switch supplies this 12 Vpc when the door is open to the LED Modules terminal 5 WH When 12 Vpcis measured on the LED module of the refrigerator or freezer from BK to WH the LEDs will turn on Note Remember there must be 12 from BK to RD also Look closely again at the refrigerator door switch Remember there are actually 2 of these switches 1 for each refrigerator door wired as the diagram shows When either refrigerator door is opened 12 Vpcfrom SB to BL WH is sent to CON 5 pin 7 on the main control power board A jumper is placed on the board from CON 5 pin 7 to CON 4 pin 1 BL WH With the refrigerator door open the 12 Vpcleaves CON 4 pin 1 BL WH and connects to the white WH wire on pin 5 of the refrigerator LED Module As with the freezer LED Module when 12 Vpcis present on pin 5 WH the LEDs will turn on FINAL REMINDER All LED DC voltages on the main power board are refer
11. and ICE ROOM FAN ACCESS Remove the top drawer rails LMX21981xx Page 45 TRAINING MANUAL 21981 EVAPORATOR and ICE ROOM FAN ACCESS continued Release the tabs on the back panel and pull the panel out toward you Freezer Fan Separate the connectors and you can remove the entire panel assembly from the freezer NOTE The ice room fan supplies air to the ice room through ducting in the cabinet Where the door meets the cabinet there are gaskets to seal the ducts between them allowing the air to go into the ice room The air supply enters through the top and the return is on the bottom LL 1 110 0 00 0 00 11122 LMX21981xx Page 44 TRAINING MANUAL 21981 FREEZER SECTION MULLION The service manual makes no reference to this loop It would be very easy for a technician to break these refrigerant lines when attempting to access the fan motors or defrost components CAUTION DO NOT ATTEMPT TO REMOVE THE MULLION IT CONTAINS REFRIGERANT LINES The rear panel can be easily removed after removing the left and right upper door supports The panel can then be slid through the upper door opening above the Yoder line heater in mullion black lines mullion LED LAMPS REFRIGERATOR If necessary unload remove the top shelves Remove the two screws Grasp both ends of the lamp assembly a
12. click into place NOTE If the filter will not turn from side to side it isn t fully inserted After replacing the filter dispense for 2 minutes from the water dispenser to purge the water system Check the filter for leaks When the water filter indicator displays the message O Filter Month Hold 3 Seconds reset the water filter status display and indicator light by pressing and holding the LIGHT FILTER button for more than 5 seconds lt lt lt LMX21981xx Page 20 TRAINING MANUAL IMX21981xx REFRIGERATOR DISASSEMBLY REMOVING AND REPLACING REFRIGERATOR DOORS CAUTION Before you begin unplug the refrigerator Remove food and bins from doors Left Door FIGURE 2 Next Page 1 Disconnect water supply tube by pushing back on the disconnect ring 4 See FIGURE 1 next page 2 Open the left door Loosen the top hinge cover screw 1 Use a flat tip screwdriver to pry back the hooks on the front underside of cover 3 Lift up the cover Disconnect the door switch wire harness 2 Remove the cover Pull out the tube Disconnect the three wire harnesses 5 Remove the grounding screw 6 Rotate hinge lever 7 counterclockwise and remove Lift the top hinge 8 free of the hinge lever latch 9 ae CAUTION When lifting the hinge free of the latch be careful that the door does not fall forward 7 Place the door inside facing up onto a non scratching surface Right Door F
13. error code Er IS is displayed The ice sensor will NOT cycle the icemaker The defrost cycle terminates after one hour After displaying the error code Er dH the cooling operation resumes Error codes are cleared immediately upon the completion of repairs 1 2 1981 xx 51 TRAINING MANUAL 21981 THERMISTORS SENSORS Orange to Orange Defrost 0 5 4 5 Voc or Resistance White to White Refrigerator 0 5 4 5 Voc or Resistance Blue to Blue Freezer 0 5 4 5 Vpc or Resistance Thermistors are NTC Negative Temperature Coefficient As the temperature DECREASES the resistance INCREASES As the resistance INCREASES the voltage DECREASES Refer to page 74 for the Temperature Resistance Chart ROOM THERMISTOR BROWN to BROWN 0 5 4 5 Voc Resistance Disconnect the wire connector Set the meter to Refer to page 74 for the Temperature Resistance Chart Opening jumpers JCR1 and 2 will increase the refrigerator temperature by 1 C each Opening jumpers JCR5 and 4 will decrease the refrigerator temperature by1 C each 1 C 1 8 2 1981 xx 52 TRAINING MANUAL 21981 MULTI DUCT Pry out the upper and lower caps and remove the two screws Separate the electrical connectors when the
14. state of each temperature sensor are as follows SENSOR CHECK POINT NORMAL 30 C 50 C HORT CIRCUITED Freezer sensor POINT A Voltage Refrigerator sensor POINT B 0 5 7 5 Defrosting sensor POINT C Voltage Room Temperature sensor POINT D Voltage Icing sensor POINT Voltage lt lt lt Ss LMX21981xx Page 65 TRAINING MANUAL 21981 REFRIGERATION COMPARTMENT STEPPING MOTOR DAMPER CIRCUIT 12V 5V 6 7 q 4 R28 R29 R30 Ba el pino pros 1 res wl m E 8 m E 4 od E DISPENSER ICE MAKER S W Auger Motor Con1 Pin12 Con1 Pin4 115 VAC Solenoid Cube Cont Pin4 115 VAC Pilot Water Valve Con1 Pin10 Con1 Pin4 115 VAC solenoid Dispenser Con1 Pin9 Con1 Pin4 115 VAC Heater Cont Pin Cont Pind 115 VAC LED IN REFRIGERATOR FREEZER Optional 12V GND CON6 E uawan LMX21981xx Page 64 TRAINING MANUAL IMX21981xx REFRIGERATOR LED IN REFRIGERATOR FREEZER Optional continued PR DUUM FATA EE 0 0 20 6 6 6 6 6 0 60 6 0 6 2 0 wg jv rt e o 2 fn 2 1981 xx 65 TRAINING MANUAL
15. the cycle when the ice is released from the mold and pushed into the bin When harvest mode begins the mold heater operates for 30 seconds then the motor starts The feeler arm senses the amount of ice while the ejector rotates If the bin is full the heater is turned off and the ejector stops If the bin is not full the ejector rotates two turns to eject the ice and begin a new cycle If the ejector does not rotate at least one full turn within five minutes a separate heater control mode activates to prevent damage to the icemaker FILL PARK MODE After the harvest mode is complete the water valve is opened to fill the mold for the next cycle The amount of water is related to the water pressure but can be adjusted by changing the time for which the valve is opened With the icemaker turned on press the button to increase the size of the cubes to the next available size Subsequent presses will cycle through all available sizes ICEMAKER INDICATOR LIGHTS 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 LMX21981xx Page 51 TRAINING MANUAL 21981 Start Position Icemaking Mode Adjusts EJECTOR to Start Position with power on Waits until water becomes ICE after starting the icemaking operation Runs MOTOR to drop ice
16. the rail into the left side gear and insert the gear into the clip continued on next page L 2 1981 xx 25 TRAINING MANUAL 2 1981 REINSTALLATION continued The rail system will align itself by pushing the rails all the way into the freezer section Pull the rails back out to full extension Reinstall the freezer door by inserting the rail tabs into the guide rail Reinstall the two screws into the guide rails one from each side Reinstall the lower basket and close the freezer door mar LMX21981xx Page 26 TRAINING MANUAL 21981 DISPENSER ASSEMBLY Remove the tray Lift out the grate Then pull the tray out past the stops without breaking it NOTE Pay close attention to the clip that is located under the tray Look at how it is installed in case it comes out while removing the dispenser assembly Remove the tray Lift out the grate Then pull the tray out past the stops without breaking it Release the lower clips s aaj 1 r LMX21981xx Page 27 TRAINING MANUAL IMX21981xx REFRIGERATOR DISPENSER ASSEMBLY continued Release the side clips Loosen all four edges Pull the dispenser assembly forward and remove all the connectors r 2 1981 xx 28 TRAINING MANUAL IMX21981xx REFRIGERATOR DISPENSER ASSEMBL
17. turn the dispenser light on and off Page 17 TRAINING MANUAL LMX21981xx ACTIVE WATER BUTTON WATER SWITCH ICE SWITCH Incorrect Water SETTING THE DOOR ALARM LMX21981xx Page REFRIGERATOR CAUTION When filling the container with a small opening use it near the opening of the water or ice dispenser as close as possible Correct Press and hold the ALARM LOCK button for three seconds to lock the dispenser and all of the other control panel functions Press and hold again for three seconds to unlock The ALARM LOCK button also controls the door alarm that sounds three times in 50 second intervals when a compartment door is left open for more than 60 seconds The alarm stops sounding when the door is closed 18 TRAINING MANUAL 21981 RESETTING THE FILTER INDICATOR Press and hold the LIGHT FILTER button HOLD for more than 3 seconds to reset the filter LIGHT FILTER 5 MONTH indicator after the water filter has been replaced NOTE Replace the filter when the water filter indicator light reaches 0 or whenever the water or ice cube taste deteriorate noticeably To purchase replacement water filter cartridges visit your local appliance dealer or parts distributor You can also call 1 877 714 7486 The replacement water filter cartridge s part number is 523 1 2006 ACTIVATING ICE PLUS Press the ICE PLUS button once to activate the
18. 03 Quick connect terminal brass conforms to UL 310 MEMA DC 2 DIN 46344 murawaaa a u w u D 0M na LMX21981 xx Page 55 TRAINING MANUAL LMX21981xx REPLACING THE OLP LMX21981xx REFRIGERATOR Remove the rear cover of the refrigerator to expose the compressor and mechanical area Remove the two screws on the retaining clamp of the compressor Loosen two screws on the compressor base Use a flat screwdriver to pry off the cover Remove and replace the OLP and the PLC These should be replaced as a set Replace the cover and tighten all screws loosened Page 56 TRAINING MANUAL LMX21981xx CIRCUIT DIAGRAM SOW IBGLIHM 56 NOLLdO LHVIS 1300 ONY OL 12318015 211 NO 3874 1HVd HLHY3 ONY LHVd WS HOCK WS HT a 19 01 35813510 AISWASSY e 8 l3ls r e 2 asiya 03 AS 14 T8 n 1 H3IHHYH 5 H31vM 2111 2118 TE 21118 HM AVHO FUE TN zNO2 INOS GE ES 114 321 A MAIN PWB ASSEMBLY
19. Dispensing Water 17 Dispenser Light 17 Setting the Dispenser Lock 18 Setting the Door Alarm 18 Resetting the Filter Indicator 19 Activating ICE PLUS 19 Diagnostic Failure Detection 19 Replacing the Water Filter 20 Disassembly 21 Removing and Replacing Refrigerator Doors 21 Door 23 Remove and Replace the Pullout Freezer Door 23 Reinstall the Pullout Freezer Door 25 Dispenser Assembly 27 Display 29 Refrigerator LED 30 Door Switches Refrigerator Freezer 30 51 Icemaking Mode 31 Harvest Ejection Mode 31 Fill Park Mode 31 Indicator Lights 31 Cycle 32 Test Mode 32 Diagnostic Chart 55 xar LMX21981xx Page 1 TRAINING MANUAL LMX2 1981 xx REFRIGERATOR Icemaker continued Error Codes 53 Main Control Board Conductor Reference Photo 34 Power From Board Icemaker 35 Removal 35 Service Bulletin 57 Pilot Valve Assembly 40 and Water Valves 41 Fan and Motor Disassembly 42 News Flash 42 Freezer Fan 42 Ice Room Fan 43 Condenser Fan 43 Evaporator and Ice Room Fan Access 43 Freezer Section Mullion 45 LED Lamps Refrigerator 45 Refrigerator Module Connector 46 How It Works 46 Refrigerator LED Module 48 Defrost Control Assembly 50 Thermistor Tips 51 Thermistors Sensors 52 Room Thermistor 52 Temperature Compensation 52 Multi Duct 53 Stepper Motor 54 Compressor PTC Positive Temperature Coefficient 54 Compre
20. GHT FILTER button resets the water filter replacement indicator when the water filter has been replaced 7 ALARM LOCK BUTTON Press this button to control the door open alarm Press this button to lock or unlock all the other function buttons on the control panel including operation of the dispenser Page 14 TRAINING MANUAL LMX21981xx LMX21981xx ICE TYPE Q CRUSH oo REFRIGERATOR THE LED DISPLAY The LED display shows the temperature settings dispenser options water filter door alarm and locking status messages 1 DISPENSER SELECTION INDICATOR Shows that Cubed ice or Crushed Ice selection will be dispensed when the push switch is pressed 2 FREEZER TEMPERATURE Indicates the set temperature of the freezer compartment in degrees Celsius or Fahrenheit 3 REFRIGERATOR TEMPERATURE Indicates the set temperature of the refrigerator compartment in degrees Celsius or Fahrenheit 4 ICE PLUS When the ICE PLUS button is pressed the display will indicate the selected function has been activated 5 DISPENSER LIGHT INDICATOR When the LIGHT button is pressed the display will indicate the selected function When the dispenser light is on this indicator will appear on the display panel 6 DOOR ALARM INDICATOR This indicator shows that the door open warning alarm is activated 7 WATER FILTER STATUS This indicator shows the current status for the water filter See Resetting the Filter Indica
21. ICE PLUS function The ICE PLUS icon on the display panel will illuminate when activated The ICE PLUS function runs the freezer compartment at the coldest setting for a 24 hour period to increase icemaking by up to about 20 and then turns off automatically ICE PLUS AN NOTE Press the button again to cancel the ICE PLUS function DIAGNOSTIC FAILURE DETECTION The diagnostic function automatically detects problems with your refrigerator and a diagnostic code will appear in the display 07779 7 77777 LMX21981xx Page 19 TRAINING MANUAL 21981 REPLACING THE WATER FILTER Replace the filter when the water filter indicator decrements to O or the water dispenser or icemaker noticeably decrease production Rotate the knob of the old cartridge counterclockwise When the cartridge is released you will feel it click out of place NOTE Replacing the filter causes a small amount of water around 1 oz or 25 cc to drain Place a cup under the filter hole to contain Remove the old cartridge Take the new cartridge out of its packaging and remove the protective cover from the o rings Hold the cartridge handle in its vertical position and firmly push the new filter cartridge into place until it stops Use the handle to twist the cartridge clockwise about one turn until the handle is horizontal position You will feel the filter
22. IGURE 3 Next Page Open the door Loosen the top hinge cover screw 1 Lift up the cover 3 Disconnect the door switch wire harness 2 Remove the cover Disconnect the wire harness 5 Rotate the hinge lever 6 clockwise and remove Lift the top hinge 7 free of the hinge lever latch 8 Q N CAUTION When lifting the hinge free of the latch be careful that the door does not fall forward 5 Lift door the up from middle hinge pin 9 and remove the door 6 Place the door inside facing up onto a non scratching surface See drawings next page lt lt lt FL LMX21981xx Page 21 TRAINING MANUAL LMX21981xx REFRIGERATOR Figure 3 Figure 1 1 Insert the tube until you can see only one of the lines printed on the tube 2 After inserting pull the tube to ascertain that it is secure 3 Assemble clip 2 Press gasket into channels on the three remaining 3 3 DOOR ALIGNMENT sides door If the space between your doors is uneven follow the instructions below to align the doors 1 Wilh 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 ihe doors are aligned Three snap rings are provided with unit Figure amp 3 Replace door frame cover Starting top of cover and working down snap cover back into door Figure 7 3 4 FAN AND MOTOR EVAPORATOR 1 Remove the
23. IMX21981xx REFRIGERATOR SPECIFICATIONS DIMENSIONS Depth w Handles 30 in 34 1 4 n Depth wlo Handles B 2m _ D Wn TRIN O Height to of Door Hinge 69 3 4 69 3 4 in 4 in 35 3 4 in ama ee a I Width 353 Width door open 90 deg w o handle 39 1 4 in 39 1 4 in ee masa Width door open 90 deg w handle 44 1 4 in 44 4 4 jn mua LMX21981xx Page 4 TRAINING MANUAL 21981 ENERGYSTAR qualified models use at least 15 less energy than required by current federal standards LG s Energy Star refrigerators allow consumers to save money energy and protect the environment 21 cu ft 25 cu ft DIMENSIONS inches 3990 X30 WXDXH COMPRESSOR NET WEIGHT pounds COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control Full Automatic REFRIGERATOR LED Module 2 DEFROSTING SYSTEM LAMP Heater Defrost FREEZER LED Module 8 DOOR FINISH Embossed Metal Stainless HOLE INNER CASE ABS Resin INSULATION Polyurethane Foam LMX21981xx Page 5 TRAINING MANUAL 21981 PARTS IDENTIFICATION iS ooo Sono ocr x 0 ADJUSTABLE REFRIGERATOR SHELVING The refrigerator compartment shelves are adjustable to allow flexibility for storage needs MODULAR D
24. LG TRAINING MANUAL Four Door Refrigerator LMX21981 Fall 2008 73 z Comm i lt 2 2 y 2 9M N AN j 18 I tar Ay AI p i si T p 1 7 f 17 1 9 3 1 5 Published August 2008 by LG Electronics USA Trainng Center Copyright 2008 LG Electronics of Alabama Inc PHONE CONTACTS Contact Number Hours of Operation Customer Service 800 245 0000 24 7 365 days a year Technical Support 800 847 7597 7am 7pm Mon Fri Sat 8 2 CST Parts Sales 888 393 6484 7 7 Mon Sat CST Training Center 256 774 4051 8am 5pm Mon Fri CST WEB CONTACTS Web Site Address Description LG USA www lgusa com USA sales site Customer Service us lgservice com Customer support GCSC aic lgservice com Service center support Customer Service Academy www LGCSAcademy com Technical training 21981 1 21981 REFRIGERATOR Contents 1 Safety Notices and Warnings 5 Specifications 4 Parts Identification 5 Installation 6 Weight Hazard 7 Leveling Flooring 8 Handle Removal 8 Door Removal Right and Left Doors 9 Water Tube Connection 11 Water Line Installation Kit 12 Operation Control Panel and Display 14 Adjusting the Temperatures and Displays 16 Operating the Dispenser 17 Dispensing Crushed or Cubed Ice 17
25. OOR BINS Three interchangeable bins can be arranged to suit your storage needs 9 REMOVABLE ICE STORAGE BIN The ice storage bin can be removed to fill ice buckets coolers or pitchers o INTERIOR LAMPS Two separate LED arrays light the freezer and refrigerator interiors TILTING DOOR BIN FIXED DOOR BIN LMX21981 xx Page 6 TRAINING MANUAL 21981 INSTALLATION WEIGHT HAZARD The refrigerator weighs as much as 325 pounds 148 kg We recommend a minimum of two people for moving and servicing this refrigerator LEVELING Be sure the floor is level and strong enough to support the refrigerator Unstable installation or unleveled flooring may cause vibration noise and poor door operation Be sure to level the refrigerator at installation using the height adjusting screws leveling legs If the base grille kick plate is installed remove it by removing the two screws that hold it on When the refrigerator is in place adjust the leveling legs by turning them counterclockwise to raise or clockwise to lower the refrigerator Use an 32 8 mm wrench to turn the hex ends of the leveling bolts or stick a flat screwdriver in the slots to turn them If you have a helper to push against the top of the refrigerator and take the weight off the leveling legs you can turn them by hand Be sure to lower them enough to contact the floor and su
26. QWA 0 7 7 259505 9 GR L2585QWA 0 LFX259505B EKHQ EKHQ GR L258SSJ ASTCLGA 557 GR L258SSKA F LFX25960ST EKHQ EKHQ GR L258SSLA ASTCSEF 77573 GR L258SSLA ASTCSER 77563 EKHQ EKHQ EKHQ EKHQ GR L258STKA LFX25960TT GR L258STWA LFX25950TT GR L258SVKA e LFX25960SB Buyer Name Buyer Code Buyer Name Buyer Code Buyer Name Buyer Code LGEUS 15000001 LGEAI 5000002 EFFECTIVE EFFECTIVE FROM SERIAL Subject Door Icemaker has changed Loc Before Change After Change No PartNo DESC SPEC DESC SPE 1 600A 5989JB0001A BC HEATING R35 0 INDOOR murai aw LMX21981xx Page 5 TRAINING MANUAL 2198 1 REFRIGERATOR Service Bulletin Reason Of Change Condition In Door has been changed Correction 58898JB0001A Previous icemaker P No is now AEQ35756901 New icemaker Changed Feature 1 The stainless lever rolls fram bottom of the new icemaker 2 Three bridges which cross the legs of heater cover are added Caution 1 Use the new part number when ordering a replacement icemaker 2 Check for proper operation of the new icemaker by running the Test forced harvest Mode after installation CREF20070558 In Door See page 3 of this bulletin FILE THIS SERVICE BULLETIN WITH YOUR SERVICE MANUAL NOTE INTERCHANGEABILITY CODE KEY WORD CODE
27. TEST PCB MODE3 Reset to the previously setting The compressor will Before TEST MODE Start after a 7 minute Delay LMX21981xx Page 58 TRAINING MANUAL IMX21981xx REFRIGERATOR ERROR CODES Error Display E Freezer Ref Error Generation Factors Temperature Temperature Normality Normal operation of Display Sensor Short or Disconnection of Freezer Sensor Refrigerator Short or Disconnection Sensor Error of Refrigerator Sensor Defrosting Short or Disconnection each sensor Sensor Error of Defrosting Sensor Check the connection at Icing Sensor Short or Disconnection Error Er IS of Icing Sensor Poor Defrosting Abnormality of BLDC FAN Motor for Making Abnormality of BLDC FAN Motor for Freezer Communication Error Room Temperature M Sensor Error LMX21981xx If 1 hour has passed since defrosting began but the sensor is not above 46 F failed No feedback signal for more than 65 seconds during fan motor operation No feedback signal for more than 65 seconds during fan motor operation No feedback signal for more than 65 seconds during fan motor operation Communication Error between Micom of Main PCB and Display Micom ICE PLUS and FREEZER keys pressed together Page 59 8 C the defrost mode has disconnection DRAIN Jam Temperature Fuse Disconnection Heater Poor Relay for Heater Defective BLDC fan motor
28. Y continued Back view of dispenser Display PCB WHITE BLACK 1 2Vpc to Display Board BRIGHT ORANGE Ground BROWN RX RX to Ground Receives Variable Vpc Pulse RED TX TX to Ground Transmits Variable Vpc Pulse xar LMX21981xx Page 29 TRAINING MANUAL IMX21981xx REFRIGERATOR REFRIGERATOR LED BLUE WHITE 12Vpc from Refrigerator Door Switch CON 5 BLU WH to PK CON 6 or BOR Door CLOSED 0 Vpc Door OPEN 12 Vpc BLUE WHITE 12Vpc from PC to WHITE on LED CON 4 BLUE WH to PK CON 6 or BOR Door CLOSED Vpc Door OPEN 12Vpc REFRIGERATOR DOOR SWITCH GRAY to GRAY Switch Door OPEN Switch CLOSED CON 4 Door CLOSED 4 5 Vpc Door OPEN 0 Vpc This is a monitoring circuit FREEZER DOOR SWITCH Brown to Brown Switch Door Closed Switch is OPEN CON 6 O VDC Door OPEN 4 5 VDC Door CLOSED This is a monitoring circuit LMX21981xx Page 50 TRAINING MANUAL 21981 icemaking cycle begins with the water fill operation When the water is frozen as determined by a sensor incorporated in the tray the cubes are ejected and the process is repeated The sensor triggers the cycle when it reaches 16 to 19 F 7 C approximately 55 minutes after the start of the cycle HARVEST EJECTION MODE Harvest ejection occurs at the end of
29. duct is removed Replace the foam gasket if it is damaged Be sure the newly adhered gasket does not interfere with damper operation Store the duct where it will not be damaged or crushed during repairs Replacement is the reverse of this procedure nn LMX219681xx Page 55 TRAINING MANUAL LMX21981xx STEPPER MOTOR s s s 2 STARTER TERMINAL Resistance Starter Capacitor Running LMX21981xx Page 54 REFRIGERATOR Blue to Black Pulsing mVpc 75Hz while operating 400 Q Yellow to Red Pulsing mVpc 75Hz while operating 400 120 Vac loads switching relays The PTC Positive Temperature Coefficient is a non contact ceramic semiconductor that uses BaTiO The resistance increases as the temperature increases This part is attached to the compressor case and used to start the compressor and to prevent starting when conditions require The compressor is a single phase induction motor The PTC allows current to energize both the start and main windings to start the motor TRAINING MANUAL 21981 PTC must allowed to cool before the system be restarted Within the sealed system it takes approximately 5 minutes for the pressure to equalize so the compressor can restart When the PTC cools sufficiently the compressor can start again If the compressor attempts to restart before t
30. e next time the door is opened The display will also turn on when any button is pressed and it will remain on for 20 seconds after the last door opening or button selection To deactivate the Power Saving Mode press the FREEZER and ICE PLUS buttons simultaneously and hold them for 5 seconds until the tone sounds Page 16 TRAINING MANUAL LMX21981xx OPERATING THE DISPENSER DISPENSING CRUSHER OR CUBED ICE nao 2 2 Press the ICE TYPE button to illuminate the Crushed Ice icon Press the push ice switch with a glass or other container and crushed ice will be dispensed Press the ICE TYPE button to illuminate the Cubed Ice icon Press the push switch with a glass or other container and cubed ice will be dispensed NOTE Hold the glass or other container in place for a couple of seconds after dispensing ice or water to catch the last few cubes or drops The dispenser is designed to not operate while either refrigerator door is open DISPENSING WATER DISPENSER LIGHT LMX21981xx Press the push water switch or active water button with a glass or other container and chilled water will be dispensed When the water switch or active water switch is pressed the light will be illuminated NOTE When operating the WATER button it does not work when you press both ends and not the center It works only when you press the center of the button Press the LIGHT FILTER button to
31. ed to the motor cover FAN ASSEMBLY MOTOR Pull the fan blade off its shaft by turning it counterclockwise as you pull NEWS FLASH The fan motor is a variable speed DC motor If it becomes jammed it will try to start every thirty seconds for five minutes and then once every thirty minutes The input voltage and signal voltages are measurable To clear the ER error code unplug repair and replace the fan motor Or if you wait thirty minutes the situation will clear itself The fan speed is controlled by the sensor temperature If the signal is interrupted the motor will run for five minutes After that time the fan will stop and an error code will be displayed FREEZER FAN WHITE SUPPLY Positive BLACK GROUND PURPLE SIGNAL Positive While operating 4i to Approx 15 9 Vpc V Voltage 15 during ICE PLUS Ground PR to BLK Approx 2 F Feedback Door OPEN OFF Voc 2 198 1 xx 42 TRAINING MANUAL IMX21981xx REFRIGERATOR ICE ROOM FAN RED SUPPLY Positive BLUE GROUND BROWN SIGNAL Positive While Operating RD to BL Approx 11 1 Vpc BL to BR 2 5 Vpc Door OPEN or OFF O Vpc CONDENSER FAN SKY BLUE SUPPLY Positive BRIGHT ORANGE GROUND YELLOW SIGNAL Positive While operating SB to BO Appox 11 1 Vpc Y to BO 2 5 Door OPEN OFF O Voc EVAPORATOR
32. enced measured from CON 6 pin 15 PK Pin 15 is the ground reference terminal Likewise on the LED modules pin 2 BK is the ground reference when measuring DC voltages to pins 1 and 3 lt lt lt LMX21981 xx Page 47 TRAINING MANUAL 2198 1 REFRIGERATOR LED MODULE White to Black Door closed White to Black Door open 12 Voc LMX2 1981 xx Page 48 TRAINING MANUAL 21981 REFRIGERATOR LED MODULE continued Red to Black 12 Constant The freezer LED assembly is similar to the refrigerator but smaller The repair procedure is the same SKY BLUE 12 VDC supply to all LED E door switches WHITE Wires mu 5 26 5537 WQ GRAY 12 VDC supply to all LED modules RED Wires PINK Negative to all LED door switches BLACK wires EEE 2198 1 xx 49 TRAINING MANUAL 2 198 1 xx DEFROST CONTROL ASSEMBLY DEFROST CONTROL The defrost sensor consists of a temperature sensor and a thermal fuse ASSEMBLY This assembly is attached to the metal side of the evaporator and senses temperature It turns off the defrost heater at 46 F 8 C The thermal fuse Fuse M is for safety to prevent overheating during the defrost cycle The thermal fuse is a single use item when it blows it must be replaced as an assembly
33. freezer shelf If your refrigerator has an icemaker remove the icemaker first lt lt lt ES 2 1981 xx 22 TRAINING MANUAL 2 1981 xx DOOR Loosen the front screw nearest the hinge of the bracket Lift the hinge with one hand It might be necessary to loosen the rear screw slightly Lift the icemaker door out of the lower hinge with the other hand REMOVE and REPLACE the PULLOUT FREEZER DRAWER Open the freezer door Remove the lower basket LMX21981 xx Page 23 TRAINING MANUAL LMX21981xx PULLOUT FREEZER DRAWER continued REFRIGERATOR Remove the two screws from the guide rails one from each side Lift the freezer door up to unhook it from the rail support and remove Pull both rails to full extension 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 Remove the center rail 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 LMX21981xx Page 24 TRAINING MANUAL 21981 FOLLOW THESE STEPS TO REINSTALL Reinstall the right side gear into the clip Insert the rail into the right side gear The gears do not need to be perpendicular to each other Insert
34. from the tray into the ICE BIN During harvest mode checks if the ice bin is full Reaches Start Position Park Position Performs Icemaking Mode after supplying water by operating the ICE VALVE To operate LINE and SERVICE press and hold the Cube Size Button for 3 seconds The icemaker will run through 3 stages Harvest Fill YW 9 v9 Test Mode TEST MODE Press and hold the cube size button for more than three seconds to put the icemaker into test mode The test cycle can be used to diagnose icemaker issues and to clean it The test mode can be started only in ice making mode it cannot be accessed while the icemaker is filling or ejecting Press and hold the cube size button for more than three seconds to put the icemaker into test mode The test cycle can be used to diagnose icemaker issues and to clean it The test mode can be started only in ice making mode it cannot be accessed while the icemaker is filling or ejecting CAUTION If the icemaker is cycled through test mode before the water already in it has frozen the ejector will pass through the water and any added water will cause the mold to overflow uawan SJ LMX21981xx Page 52 TRAINING MANUAL 21981 If the icemaker does not operate normally during test mode turn it off Check it and repair as necessary or replace When the test cycle is complete the icemaker reverts
35. he PTC has cooled the PTC will allow current to flow to only the main winding and the OLP will open because of the over current condition This process will repeat itself 3 to 5 times while the compressor tries to restart until the PTC cools sufficiently It is critical to use the correct parts when replacing the OLP and PTC or the compressor will be damaged Parts may appear physically identical but could have different electrical ratings Order replacement parts by model number and serial number OVERLOAD PROTECTOR OLP The OLP Over Load Protector is attached to the outside of the compressor and protects it by opening the circuit if the temperature exceeds the operating limit When high current flows to the compressor the heater inside the OLP causes the bimetal spring to expand interrupting the current to the compressor Do not adjust the OLP in any manner Part Customer part No Name number 1 Base phenolic UL 94 rated 2 Movable arm support plated steel characteristics te ni alio conieci support part number 1 nart number plated steel 4 Heater support plated steel 5 Heater resistance alloy 6 Disc thermostatic alloy 7 Movable arm spring temper copper alloy Contact movable silver copper 9 Contact stationary silver on copper i Slug plated steel ID Cover polyester UL 94 V 0 rated i3 Pin connector plated copper alloy engage 2 33 2 56 mm dia pin
36. in Be certain you understand all the requirements for installing and connecting a water connection for this refrigerator WARNING Connect the water supply tube from the refrigerator to a potable water supply only The water pressure requirement for this refrigerator is 43 121 psi 3 8 5 kgf cm If the existing pressure is insufficient the customer can purchase a separate pressure pump to provide normal ice making and water dispensing operation e The total length of the water supply line should not be greater than 26 feet 8 meters e Use copper tubing or a braided reinforced nylon supply line e Install the water line in an area where the temperature will not drop below freezing e It may take up to 24 hours for the icemaker to begin producing ice The icemaker water valve includes a flow washer that is used as a water pressure regulator TOOLS REQUIRED Standard screwdriver l4 nut driver 7 16 open end wrench V open end wrench drill bit drill electric drills must be grounded WATER LINE INSTALLATION KIT Some dealers sell an installation kit that includes all the parts necessary to connect the refrigerator to a water line Often these kits include a piercing saddle type valve that allows connection to the water line without the need for plumbing skills LG does not recommend the use of this type valve because it often fails to provide sufficient water flow for the icemaker and dispenser to function proper
37. ivated GREY 120 Vac to water dispenser pilot valve rear when activated WHITE 120 Vac to defrost circuit when activated BROWN 120 Vac to heaters pulsing OFF amp ON BLUE Neutral constant RED 120 Vac to icemaker pilot valve rear when activated ICEMAKER REMOVAL Remove five AC motor assembly screws Remove the entire icemaker assembly mI 77 77 2 1981 xx Page 55 TRAINING MANUAL 2198 1 ICEMAKER REMOVAL continued Separate the two electrical connectors Remove the upper screws Remove the ground screw Replace it in the icemaker assembly in the event you need to reuse it or require it in the replacement unit Separate the 4 pin electrical connector p a LMX21981 xx Page 56 TRAINING MANUAL 21981 SERVICE BULLETIN Service Bulletin LG Electronics No CREF20070556 Date 2007 12 12 Factory Factory Model Suffix Model No Factory Factory Model Suffix Model No EKHQ EKHQ GR L218DSVA 219805 GR L218SSKA LFX21960ST EKHQ EKHQ GR L258DSVA LFX25980ST GR L258SQJ ASWCLGA LFX25960SW EKHQ EKHQ R L258SQKA LFX259608W GR L258S8QLA ABICSER 77564 EKHQ _ GR L258SQLA ASWCSEF 77572 GR L258SQLA ASWCSER 77562 EKHQ EKHQ GR L258SQLA AWBCSEF 77579 GR L258SQLA AWBCSER 77569 EKH GR L2585
38. ll the air through the system When water begins coming out run another quart to be sure all the air is out of the line Turn the icemaker on and cycle it manually until water fills the tray to ensure all the air is out of the line LMX21981xx Page 13 TRAINING MANUAL LMX21981xx OPERATION FREEZER ICE TYPE ICE PLUS LIGHT FILTER LARM LOCK secs LMX21981xx REFRIGERATOR 1 LED DISPLAY The LED display shows the temperature settings dispenser options water filter door alarm and locking status messages 2 ICE TYPE BUTTON The ICE TYPE button is used to select Cubed Ice or Crushed Ice 3 FREEZER BUTTON Press the FREEZER button to adjust the temperature in the freezer compartment NOTE When pressed simultaneously with the REFRIGERATOR button for more than five seconds the temperature display will change from Fahrenheit to Celsius or vice versa 4 REFRIGERATOR BUTTON Press the REFRIGERATOR button to adjust the temperature in the refrigerator compartment NOTE When pressed simultaneously with the FREEZER button for more than five seconds the temperature display will change from Fahrenheit to Celsius or vice versa 5 ICE PLUS BUTTON Press this button to turn on the ICE PLUS feature which increases ice making capabilities up to about 20 percent 6 LIGHT FILTER BUTTON The LIGHT FILTER button controls the lamp in the dispenser The LI
39. llation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment to an outlet on a different circuit than that to which the receiver is connected or consult the dealer or an experienced radio TV technician for help DISCLAIMER The information in this training manual was accurate at the time of publication Every effort has been made to ensure accuracy Updates changes etc are available via GCSC and LGCSacademy The information in this manual is intended for persons with adequate backgrounds in electronics mechanical and electronic servicing The manufacturer and seller are not to be held responsible for any liability incurred from its use COMPLIANCE The responsible party for this device s compliance is LG Electronics Alabama Inc 201 James Record Road Huntsville AL 35813 SS LMX21981 xx Page 5 TRAINING MANUAL
40. ly continued on next page a LMX21981xx Page 12 TRAINING MANUAL LMX21981xx Cold Water Pipe Pipe Clamp Coil of Polyethyleng or Copper Tubing Shutoff Valve Compression Sleeve Nut Compression Tubin Tubing 1 x Clamp 1 4 gt Ferrule Water Sleeve iL viye CONNECTING THE WATER LINE REFRIGERATOR Various connector types are available These illustrations show a saddle valve with the water line connected using a compression fitting at each end The additional coil of tubing approx imately 7 feet or 2 1 m is to allow pulling the refrigerator out for servicing or cleaning We recommend the use of a pre assembled braided plastic or nylon line with threaded couplings on both ends to prevent leakage and pop offs We recommend using a flare nut wrench to connect the water line fittings After the valve has been installed on the water line it must be flushed before connecting it to the refrigerator Remove the plastic cap from the water valve on the back of the refrigerator Attach the water supply line to the valve Open the valve and flush out the supply line before attaching it to the refrigerator Attach the supply line to the water valve on the back of the refrigerator Tighten all connections Turn on the water and check for leaks Press the water dispenser button and bleed a
41. nd pull it down and out of the cavity Use a flat screwdriver to remove the cover lamp Separate the LED assembly and the cover D LMX21981xx Page 45 TRAINING MANUAL LMX21981xx REFRIGERATOR MODULE CONNECTOR HOW IT WORKS R ROOM 12186 LED 1 Trp MODULE R DOOR OPEN PERCEPTION 4 C2 o 8 F DOOROPEN SW PERCEPTION BN BN i G 0 5 11 112005221 o lt LILLE LII N On this new 4 door refrigerator the LED control board has been incorporated into the main PWB Assembly The operation and diagnosis is easier than previous refrigerators with a separate LED control board assembly This refrigerator has 2 LED modules one in the refrigerator section and one in the freezer section They are labeled R Room LED Module and F Room LED Module Each door of this refrigerator has a door switch Each door switch is 2 switches in one These door switches have 2 single pole single throw normally closed NC switches The door open perception switch shown in CON 4 pins 11 and 12 is a 5 refrigerator door monitoring switch Notice the wire colors connecting these terminals to the refrigerator door switches are gray GY These gray wires attach to
42. nge cover Use a flat screwdriver to pry off 2 the hinge cover Hooks not shown Remove the cover and pull the water tube 3 through Disconnect all the wiring 4 harnesses Remove the ground 5 screws Turn the hinge lever 6 counter clockwise and remove it Lift the top hinge 7 free of the latch lever 8 Be careful the door does not fall forward With the door open to 907 lift it off the middle hinge pin CAUTION When lifting the hinge free of the latch be careful the door does not fall forward After removing the door lay it on a blanket or other padded protective surface with the inside facing up Replacement of either door is the reverse of the way it was removed lt lt lt Ss LMX21981xx Page 10 TRAINING MANUAL 2 1981 xx WATER TUBE CONNECTION The water tube connections must be properly assembled to avoid leaking Collet Tube Insert Line Clip Insert the tube into the connector until only one of the printed lines is visible Pull on the tube slightly to ensure proper insertion and retention Insert the retainer clip under the release ring Correct If you can see both rings the tube is not inserted properly The tube end must be i cut squarely Incorrect asa as Ym LMX21981xx Page 11 TRAINING MANUAL 21981 WATER LINE CONNECTION Read ALL the directions thoroughly before you beg
43. place a handle push or pull firmly but do not damage the handle or the door by using excessive force Replace the handles by placing the handles on the mounting bolts and tightening the set screws mzurxzwaaa a r n LMX21981xx Page 8 TRAINING MANUAL 21981 DOOR REMOVAL Disconnect the electrical supply and shut off the water to the refrigerator before installing or servicing Do not put your hands feet fingers or metal conductive items into the air vents the base grille kick plate or bottom of the refrigerator You could be injured or shocked If the entrance door is too small to accommodate the refrigerator you can remove the doors and pull the refrigerator into the room sideways RIGHT REFRIGERATOR DOOR Open the door to 907 Remove the top hinge cover 1 screw Lift the cover 2 Disconnect the wire 3 harness Rotate the hinge lever 4 clockwise and remove it Lift the top hinge 5 clear of the hinge lever latch 6 SESS LMX21981 xx Page 9 TRAINING MANUAL 21981 LEFT REFRIGERATOR DOOR Disconnect the hose at the top right corner facing the back by removing the release clip and pressing the release ring The tube will be pulled out with the door when it is removed Open the door to 907 The door must be opened to 90 6 removed or reattached Remove the screw 1 securing the top hi
44. power before servicing this product If electrical power is required for diagnosis or test purposes disconnect the power immediately after performing the necessary checks Also be aware that many household appliances present a weight hazard At least two people should be involved in the installation or servicing of such devices Failure to consider the weight of an appliance could result in physical injury ESD NOTICE Some of the electronics in appliances are electrostatic discharge ESD sensitive ESD can weaken or damage the electronics in these appliances in a manner that renders them inoperative or reduces the time until their next failure Connect an ESD wrist strap to a ground connection point or unpainted metal in the appliance Alternatively you can touch your finger repeatedly to a ground connection point or unpainted metal in the appliance Before removing a replacement part from its package touch the anti static bag to a ground connection point or unpainted metal in the appliance Handle the electronic control assembly by its edges only When repackaging a failed electronic control assembly in an anti static bag observe these same precautions REGULATORY INFORMATION This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential insta
45. pport some of the weight of the refrigerator It will keep it from moving when you pull the doors open and from tipping forward when the freezer drawer is pulled out Replace the base grille I 7 7 777777 77 LMX21981 xx Page TRAINING MANUAL 21981 FLOORING The refrigerator must be installed on a solidly constructed floor to minimize noise and vibration The refrigerator must be level If necessary adjust the leveling legs under the front of the refrigerator to compensate for variations in the flooring This is easier if the refrigerator is tipped slightly backward to take the weight off the legs Turn them clockwise to raise the refrigerator or counterclockwise to lower it Never install the refrigerator on a platform or a weakly supported structure When moving the refrigerator for cleaning or service be sure to protect the floor Pull the refrigerator straight out Do not walk or wiggle it floor damage or side panel damage may occur HANDLE REMOVAL may be necessary to remove the handles to get the refrigerator through a door Mounting Fasteners 5 Loosen set screws with a 7 32 2 5 mm Allen wrench Remove the handle If the mounting bolts require removal or adjustment use a 74 Allen wrench Allen Wrench Use extreme caution when removing the handles to avoid scratching the doors When you remove or re
46. ssor OLP Overload Protector 55 Replacing the OLP 56 Circuit Diagram Block 57 Test Mode 58 Error Codes 59 Error Code Er rt 60 PCB Function 61 Power Circuit 61 Load Fan and Door Open Detection Circuit 62 Open Door Detection Circuit Check 63 Refrigeration Compartment Stepping Motor Damper Circuit 64 LED in Refrigerator Freezer Optional 64 Main PWB Layout 65 Dispenser Drive PWB Assembly 66 Exploded Views 67 Temperature Resistance Chart 75 Ss LMX21981xx Page 2 TRAINING MANUAL LMX21981 xx REFRIGERATOR E IMPORTANT SAFETY NOTICE The information in this training manual is intended for use by persons possessing an adequate background in electrical equipment electronic devices and mechanical systems In any attempt to repair a major appliance personal injury and property damage can result The manufacturer or seller maintains no liability for the interpretation of this information nor can it assume any liability in conjunction with its use When servicing this product under no circumstances should the original design be modified or altered without permission from LG Electronics Unauthorized modifications will not only void the warranty but may lead to property damage or user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for service they must be returned to their original positions and properly fastened CAUTION To avoid personal injury disconnect the
47. to MICOM control and assumes the factory default fill setting DIAGNOSTIC CHART Check if Ice Bin is full or 3 HALL IC I If Ice bin is full the motor and heater are off and on stand by until Ice bin is empty Fl E Five seconds after heater starts a heater will go off if the temperature by sensor is higher than 10 Five seconds after heater starts you can confirm that a motor is moving You can confirm HALL IC detection of start position HALL IC II VALVE Reset Return to Status prior to Five seconds after fifth stage is completed TEST MODE The icemaker resets to initial status ERROR CODES DIVISION INDICATOR CONTENTS x REMARKS Mark time to Display switch 1 Normal supply None operates properly Two seconds after detection of start position you can confirm that valve is on Icemaking Make sure that the wire Sensor Open or short circuited wire on each sensor is malfunction connected maura a a LMX21981xx Page 55 TRAINING MANUAL LMX2 198 1xx REFRIGERATOR MAIN CONTROL BOARD CONNECTOR REFERENCE I I I Ili I IE LMX21981xx Page 34 TRAINING MANUAL 21981 POWER from BOARD to RED 120Vac supply to icemaker fill valve in the door when activated BLUE Constant neutral YELLOW Constant 120Vac supply to icemaker and refrigerator door BLACK 120 Vac to compressor when act
48. tor 8 LOCK STATUS This indicator shows the current status for the control panel functions is set to LOCK Page 15 TRAINING MANUAL LMX21981xx REFRIGERATOR ADJUSTING THE TEMPERATURE AND DISPLAYS Adjust Freezer Temperature To adjust the temperature in the freezer compartment press the FREEZER button to cycle through the range of available settings Adjust Refrigerator Temperature To adjust the temperature in the refrigerator compartment press the REFRIGERATOR button to cycle through the range of available settings NOTE The actual inner temperature varies depending on the food status since the indicated temperature setting is the target temperature and not the actual temperature within the refrigerator Initially set the REFRIGERATOR CONTROL at 37 degrees F and the FREEZER CONTROL at 0 degrees F Leave them at these setting for 24 hours day to stabilize Then adjust the compartment temperature as illustrated above LMX21981xx To change the temperature display from Fahrenheit to Celsius or vice versa simultaneously press and hold the FREEZER and REFRIGERATOR buttons for more than 5 seconds Display Power Saving Mode This function places the display into the Power Saving Mode Simultaneously press the FREEZER and ICE PLUS buttons and hold them for 5 seconds until a tone sounds All LED lights will turn on and then off When the Power Saving Mode is activated the display will remain off until th

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