DISHWASHER SERVICE MANUAL
Contents
1. 41 K262 218 K212 203 008 42 I A AD gt 43 Mor 8 M001 M12 8 D1420 D1421 Series 45 D1422 Series 46 D1423 Series 47 LG Electronics Inc P No 3828DD3007T2. 3 UV Lamp Limited on some models Remove the wire connections Remove side 4 screws Push the UV Lamp slowly 4 Door Bracket Remove 4 screws Lift up ward T Air Guide Assembly CD Lift it upward to disconnect from Water Softner Q Disconnect the wiring connection Remove 3 hoses assembly Be careful the o ring should not be lost Be careful not to wet the floor by the water left in the hose 20 8 C Base Assembly Remove the wire connections Lift them upward Be careful not to wet the floor by the water left in the sump Pull out the float switch with pressing downward softly not on all models Detach the washing motor and heater assembly by pulling opposite direction to sump Remove the 3 screw for drain motor 1 Water softner Remove the hose assembly Lift it upward Be careful not to wet the floor by the water left in the water softner You can disassemble the solenoid valve by unscrew the 2 screw Be sure not to lost the spring and bobbin 2 Heater amp Drain pump Remove the wire connections 2 Pull the Heater out of the Sump after releasing the nut Remove 3 screw to disassemble the Drain pump 21 3 Vario Motor 8 Soil sensor Remove the wire connections Remove 2 screws for Vario Motor Pull the Vario Motor Soil Sensor and Micr
3. base 2 Remove 3 Earth screws of right side amp Remove the Float switch Z f l i LAN E y 7 Base spacer Remove front 2 screws 2 Remove side 2 screws Lift the front side of dishwasher and pull the base spacer forward 8 Lower Frame Remove 2 screws Q Press the holder hook as shown in figure 25 9 Remove the side screws Remove side 4 screws 2 Remove rear 4 screws Remove 3 Earth screws of right side Lift base upward slightly You can t lift up base perfectly because of some parts connecting to base 10 Disconnect the connecting points between tub and base Disconnect noise filter Not on all models Disconnect of power cord assembly Disconnect wire from the Aquastop x Now you can remove the base from the tub perfectly 11 C Base Assembly x You can repair the parts in the C Base like heater washing motor drain motor etc you may refer to 7 1 8 1 10 x Don t disassemble sump by 7 2 If you want to disassemble the sump follow 7 1 26 8 TROUBLE SHOOTING METHODS A TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE ERROR MESSAGE POSSIBLE CAUSE FOR ERROR OCCURRENCE REMEDY INLET ERROR 4 O displayed Conditi
4. J849N Jeue4JoS Josueg DH 0E Josueg Jejen Jo3siuueu fa p qun MO J O lt HM SB BRON 22 lt l 18 FANEY MgAS LAH188SHMBOOHNSHA QHASLAMB BS gHM less ig EY sejejspiriz e e zl 11 je le e sp 191904 383113 S ON gt 21 3ATVA N393H ea a Je3DeH esnj Z MAZNI ASHTA TA HO NG aA HH 111398 asuly God uo 4dQ 1209 God 81263 12 6 PROGRAM CHART SCHEMATIC DIAGRAM vv 19 001 801 Zit dual Y ZH um 661 911 KOREN un 661 HI peo1jieH Buons C2 95 GI 9 ZH a MENTE UN duel y ZH UN 21 021 5uleaH y SuneaH Adans Jejem CUI OWL asuly Buneah Adans 1972 9 uea zasuy Adans Jejem Adans Jejem ueg ysem UEN Adans
5. 30 Washing Results are not Satisfactory YES After washing are there still Reduce the amount of Rinse Aid White deposits or streaks on for Streak the dishes Does salt refill lamp blink Refill salt NO After washing are there still food soils on the dishes YES Check that the amount of detergent Correctly used or not Filters clogged or not the holes of spray arms blocked or not Utensils are correctly arranged or not Utensils are overloaded or not the spray arm rotating is obstructed or not the program is correctly selected or not Dry Results are not satisfactory Increase the amount of Rinse Aid Set the number higher Select the Program that the Rinse temperature is higher 31 Power Button not automatically off after operation Check the button is blocked by foreign materials Check the Power Switch Replace it if necessary Check the Controller Replace it if necessary 32 9 INSTALLATION INSTRUCTION Step1 Prepare Cupboard opening 1 This dishwasher is designed to fit to the size shown as below 2 Select a location as close to sink as possible for easy connections to water and drain lines 3 The dishwasher should not be installed more than 3 meters from sink for proper drainage 4 f dishwasher is to be installed in corner minimum 5 cm of spac
6. repair or replace the related parts Replace the washing pump Check the applied voltage ERROR MESSAGE POSSIBLE CAUSE REMEDY FOR ERROR OCCURRENCE EXCESS ERROR yo i e The Inlet Valve is troubled e Replace the Inlet Valve displayed e The Air Break is troubled e Replace the air breaker Condition The Sensor Assembly is troubled Replace the sensor assembly Excessive water is sup e The Controller is troubled Repair or replace the Controller plied than normal water level Automatically drain Pump operated THERMAL ERROR e The Circuit of thermistor is troubled e Repair the Circuit of thermistor Thermistor is troubled Replace the Thermistor displayed e The Controller is troubled e Repair or replace the Controller Condition The resistance of ther mistor not normally out put HEATER ERROR The Circuit of Heater is troubled e Repair the Circuit of Heater e The Thermistor is troubled Replace the Thermistor e The Heater is shorted Replace the Heater displayed The Relay Circuit is troubled e Repair the Relay Circuit Condition The water is not heated or the temperature in the Tub is overheated to over 95jC COOL DRY e This process is not part of the program At this time the fan will operate for a few more minutes to diminish any remaining moisture If i you want you can now open and displayed unload the dishwasher Oth
7. Jejem Lug EySEeMalg Adans Jejem zusemaug Alddns seyem v ueg lysemalg Bulo A suly Bullg H yseM UIW yeya ulelBoid ysemaud 13 7 HOW TO DISASSEMBLE BEFORE DISASSEMBLING THE DISHWASHER 1 Remove the plug from electric outlet to avoid electric shock 2 Close the Water Tap faucet 3 Remove all dishes and items in the dishwasher 4 Remove the Lower Rack and the Upper Rack 5 In case of the water softner assembly model open the water softner cap to flow out the water to sump and drain to avoid the floor wet 6 If necessary remove the inlet hose and drain hose to avoid the hose damages 7 Prepare some towels to avoid floor wet by the water left in the dishwasher 7 1 FULL DISASSEMBLE 1 Top Table 1 Remove the rear 2 screws 2 Pull and lift the top table 2 Low Cover 3 Side Cabinet R L and Tub Felt 1 Cabinet R Remove front 4 screws 2 Remove rear 3 screws 2 Cabinet L Remove front 4 screws Remove rear 3 screws 2 Tub Felt amp Pull the Tub Felt 14 15 4 Door Assembly 1 Front Cover Open the door Remove 4 screws long Type stainless Remove 6
8. LG DISHWASHER BEFORE SERVICING THE UNIT PLEASE READ THIS MANUAL CAREFULLY FOR SAFETY AND CORRECT SERVICES MODEL D1420W L M T B C D A F D1421W L M T B C D A F D1422W L M T B C D A F D1423W L M T B C D A F D14131WF D14135LF D14138AC D14121WH LD 4321W LD 4421M LD 4421PV LD 4421NV CONTENTS CAU TON Mr EE 4 SPECIFICATIONS fetis sit T 5 PARIS NAME uz iae DH 6 FEATURES amp TECHNICAL EXPLANATION anta anime nahen 7 x WIRING DIAGRAM neaei kata toto a ehren 12 PROGRAM CHART SCHEMATIC DIAGRAM i menn 13 i HOW TO DISASSEMBLE nenien acerrimi Nein 14 u TROUBLE SHOOTING METHODS na ae 27 A TROUBLE SHOOTING ACCORDING TO DISPLAYED ERROR MESSAGE 27 B TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM eene 29 INSTALLATION INSTRUCTION u ee 33 TOEXPEODED VIEWS ciconia tio dtd ian nenne 37 CAUTION MDISCONNECT POWER CORD BEFORE SERVICING MRECONNECT ALL GROUNDING DEVICES IMPORTANT SAFETY NOTICE This service information is intended for individuals possessing adequate backgrounds of electrical electronic and mechanical experience Any attempt to repair this appliance may result in personal injury and property damage The manufacturer or seller can not be responsible for the interpretation of this information nor can it assume any liability in connection with its use 2 SPECIFICATION ITEM SPECIFICATION kWh Color White Lux
9. Pull up the nozzle 4 Filter Assembly D Turn inner filter counterclockwise and lift inner filter and middle filter You can disassemble inner filter and middle filter by pulling opposite direction 2 Lift up main filter 3 Lift up micro filter m rac 18 5 Nozzle Holder Disconnect the water guide Remove 4screws and lift it up 6 Sump Holder Remove the Sump Holder 5EA 7 Base spacer Remove front 2 screws 2 Remove side 2 screws Lift the front side of dishwasher and pull the base spacer forward 8 Lower Frame Remove 2 screws Press the holder hook as shown in figure 9 Tub sub Assembly Remove side 4 screws 2 Remove 3 Earth screw of right side Remove rear 4 screws Lift tub assembly upward Be sure water softner is not blocked Be careful not to be injured or scratch floor by the sharp edge of tub 6 Tub sub Assembly 1 Top Frame Remove front 2 screws Remove side 2 screws Lift up top frame 2 Balance Weight Remove real 4 screws Lift up balance weight 19
10. basket Newly introduced Slim Direct Inverter motor is inverter controlled Speed is controlled based on program selection It also offers high energy efficiency to minimize energy loss This is one of the best performance solutions for drying dishes because it minimizes venting humid air to the outside of the dishwasher In addition this system ensures better drying results compared to the condensing drying system 4 2 Display Panel M MODEL D1420 D1423 Series Program Dual Wash Pre Wash Eco Quick Gentle ll MODEL D1421 D1422 Series Program Dual Wash Auto Pre Wash Eco Quick Gentle QUV Gindicator Time Left GBeep On Off ORinse GHalf Load wm Upper A Lower Rinset um Strong Delay Start m Medium e Soft ME m Extra Hot EE Delay Start Spray Power Child Lock Cool Dry Gindicator Time Left GBeep On Off Rinse Half Load O EKEN Half Load e amp ww ea Upper l JE Lower ot IL eli inh Extra Hot Rinse Ri e m JL Jil i mm Strong Wash Rinse Dry wm Medium Spray Soft 9 O Power Delay Start Spray GPower Child Lock 0 Program When you want to select program press this bu
11. d to the same plug outlet by a double adapter or similar plug Step 3 PREPARE DISHWASHER FOR INSTALLATION 1 Lay the dishwasher on its back Free Standing Built in 2 Adjust the legs to the needed height of cabinet as shown at below Step 4 INSTALL THE DISHWASHER IN CUPBOARD 1 Before sliding the dishwasher into the cupboard opening all necessary final height adjustment and balancing adjustment should be done using the spanner 2 Slide the dishwasher into the cabinet opening carefully Make sure that the drain hose inside the cabinet should not be kinked or exceeded CAUTION If the height of cupboard is below 850mm you should remove the top table by unscrewing the 2 screws Two of front and two of rear 34 Step 5 DRAIN LINE CONNECTION 1 If the end drain hose does not fit to the drain line use a piece of rubber connector not supplied that must be resistant to heat and detergent and may be obtained from a plumbing shop 2 There are 2 typical connections as shown in Figure A B XThe recommended methods of drain hose connection must be adhered to within the areas of Water Board Authority Several other options are commonly used outside this area and local council or plumbers should be able to advise of these The S trap spigot must be drilled out cleanly and free of obstruction to its maximum internal diameter if used for drainage X To prevent syphoning one of the following instruction methods mu
12. e is required between the washer and an adjacent cabinet or a wall If bare chipboard is adjacent to or above the dishwasher it should be sealed with a waterproofing paint or sealant to prevent swelling due to steam Cut out for hoses and electrical cables on either side approx 100 X 75 Cupboard Opening Dimension mm m Ensure the floor under the dishwasher is at the same level as the rest of the room to allow for any service requirements 33 Step 2 PREPARE ELECTRICAL WIRING CAUTION For personal safety remove house fuse or open circuit breaker before installation Do not use an extension cord or adapter plug with this appliance Electrical and grounding connections must comply with the national electrical code provincial and municipal code and or other local codes 1 This appliance must be supplied with correct rating voltage and hertz as shown on instruction manual and connected to an individual properly grounded branch circuit protected by minimum 15 amp circuit breaker or time delay fuse Wiring must be 2 wires with ground 2 The power point must be in a accessible location adjacent to and not behind the dishwasher and within 1 2 meters of the dishwasher side A correctly rated wired and earthed extension cord may be used if necessary See Fig A 3 The power point must be correctly earthed if in doubt have it checked by a qualified Electrician No other appliance shall be connecte
13. erwise Condition the dishwasher automatically switches off for safety and energy saving later No error message 28 B TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM No Power on when the power button pressed The plug is correctiy Insert the Plug Correctly inserted in the Socke Ouk e Check the electricity is failed or not ocket Outlet The Fuse or NO oy k Circuit Breaker 2 2 Replace the Fuse or Circuit Breaker of house of house is O K YES The Thermal Fuse NO is O K gt Check the Thermal Fuse and replace it YES The Power Switch or i J e the Circuitis O K Check the Power Switch or the circuit and repair it YES The C Trans Circuit Check the C Trans Circuit and repair it is O K YES Check the Controller Power Circuit 29 The Wash Pump Motor does not run NO Close the Door Tightly The Door is tightly Check the Door Switch in Latch Handle closed YES The Pump Motor is NO Remove the cause of block or replace the Pump Motor not blocked YES The circuit of Pump NO Repair the circuit Motor is O K YES The Thermal Protec YES tor of Motor is Cool the Motor Until the Thermal Protector reset tripped NO Replace the Pump Motor
14. ghting Program Button 1 TIME 11 11 Dual Wash Cool Dry or UV Button 1 TIME 12 22 Cool Dry or UV Delay Start Button 1 TIME 13 33 Delay Start Half Load Button 1 TIME 14 44 Half Load Rinse Button 1 TIME 15 55 Rinse Spray Button on Auto Eco Gentle Quick 1 TIME Sensing value Turbidity Sensor Pre Wash Dual Wash 2 TIME n02 Washing Motor UV 3 TIME n03 Drain Pump Delay Start 4 TIME Frequency Inlet Valve Child Lock Salf Refill Rinse Refill 5 TIME n05 Dispenser Wash 6 TIME n06 Heater for 10 sec Rinse 7 TIME Temperature Fan Motor Dry 8 TIME n08 Regeneration Valve Upper 9 TIME n09 UV Lamp UV lamp use only Lower 10 TIME nOA Vario motor Vario S W OFF Extra Hot Rinse 11 TIME n 0b Vario motor Vario S W ON Strong Medium Soft Operate C1 mode for 1min Drain for 42sec Supply water Push Spray Button Auto Off Micro S W must be ON to operate HEATER 12 TIME AUTO OFF S W x CHECK MODE BUTTON OPERATION Delay Start Power Buzz On Off Program Button Half Load Display Inner Temperature Program Button Delay Start Display Water Supply Frequency Program Button Spray Display Soil Index Cool Dry or UV Power Select Hardness Level setting mode Default H4 Cool Dry or UV Change hardness level H4 H5 H6 H7 H0 H1 H2 H3 H4 amp Spray Set Hardness Level 5 WIRING DIAGRAM
15. ing tape or sealing compound should be used to avoid water leaks Water supply h Make sure that the line is not kinked or sharply bent i Step 7 FINAL CHECK AND ASSEMBLING 1 Securely hand tighten supply hose to water supply Plug power cord into an earthed power point and switch on 2 Operate the dishwasher through one cycle Quick cycle is recommended to check for water leak and operating conditions 96 10 EKPLODED VIEW T y y V w Lara MW LT amp Gy LETT TTF 37 D1420 Series CUTLERY RACK RAIL 38 D1421 Series 39 D1422 Series 40 D1423 Series
16. o switch 4 Impeller amp Washing Motor Remove the wire connections Remove 10 screws to disassemble the Impeller and Check valve Remove 4 screw to disassemble the Washing Motor When you reassemble the Sump Assembly be careful not to kink tear and take off the seal 22 23 5 Power cord assembly amp Noise Filter Turn the power cord assembly 90 and take it off Remove 2 screw 6 Aquastop Press the holder hook as shown in figure 2 Pull the hose assembly 7 Drain Hose Press the rear side hook Pull the holder forward amp Pull the holder upward 7 2 DISASSEMBLE C BASE ASSEMBLY Be careful not to be injured by the sharp edge of tub 1 Top Plate e See 7 1 1 Page 16 2 Low Cover See 7 1 2 Page 16 3 Cabinet R L See 7 1 3 Page 16 4 Put the Dishwasher upside down Be careful not to wet the floor by the water left in the air guide 5 Air Guide Disconnect 1 hoses assembly 24 6 Disconnect the wire Remove the wire from the wire hook at the
17. on Not reached to the nor mal water level in spite of 10 min water supply DRAIN ERROR mz LOI displayed Condition Not fully drained out in spite of 5 min drain operation LEAKAGE ERROR displayed Condition The water level in Tub goes down during operation The Water Tap is not opened e The Inlet Hose is kinked The Filter of inlet valve clogged by impure water e The Inlet Water Valve is normal e The water pressure is very low below 0 5 kgf cm Inlet valve is blocked by safety device for leakage sensing In case of Inlet Valve The Filter clogged The Drain Hose kinked or blocked The Drain Pump Motor or circuit is troubled Water leakage in Hose connections Water is leaked by damages e Impeller of the washing Pump is worn away The Thermal Protector of the washing motor is functioned TE Open the Water Tap e Repair the Inlet Hose a Close the Water Tap b Unscrew the Inlet Hose Inlet Valve side c Clean the Filter of Inlet Valve Replace or repair the Inlet Valve Check the water remain on the base 1 Check the point of damages and repair or replace the related parts 2 Disconnect the inlet hose to dishwasher to unlock the safety valve Clean the Filter Remove the cause of kink or block Replace the Drain Pump Motor or repair the Circuit Replace the connections of Hose Check the point of damages and
18. screws stainless Close the door slowly and remove front cover downwards 2 Control Panel Assembly Open the door Remove 2 screws stainless Remove wire connection Be sure the wiring should not be changed in reassembling Remove 3 screws for Latch assembly Remove 7 screws for Controller 3 Fan Open the door Remove the wire connections G Turn the Inner Cover counterclockwise Remove the air duct 4 Detergent Dispenser Close the door Remove the wire connections Remove 6 screws with brackets Push the Detergent slowly pulling up the Flange by Standard Screwdriver 5 Door Spring Right amp Left Push the Spring upwards and take it off from the Hinge Bracket Be careful not to be injured by the sharp edge of Tub Take off the Hinge Link from the Hinge 6 Door Liner Open the door Remove the wire connections Pull the Door liner upwards 5 Tub assembly 1 Rack Remove the Upper rack and Lower rack 2 Air guide Nut and Water softner Cap amp Nut Turn the Air guide Nut counterclockwise Special tool might be needed Be careful the rubber packing of air guide assembly should not be lost Turn the Water softner Cap counterclockwise 3 Nozzle
19. st be followed m When the drainage hose is connected to a sink S trap or waste disposal unit the hose must be looped up to the under side of the bench top and secured Fig A Sink Dishwasher Drain Hose 300mm Min 770mm Min L Radius 40mm Min 1000mm Mix m When the drain hose is connected to a separate stand pipe it is essential that an air tight connection is made Refer to Fig B Fig B Drainage connection stand pipe aT A Dishwasher Drain Hose Air tight Connection 300mm Min F Standpipe 40mm UW diametre Min 35 Drain Hose Extension m Drain Hose extension kits are available from through your local service centre Extend drain Hose as shown below 200 mm Max Sink y ud Copper pipe fl 20mm flared at drain nose and other end if required 300 mm C 4 770 mm Min 1000 mm Max 4 Use the couplings for connections when you extend drain hose Drain hose extension or 16 20mm inside fl rubber hose able to withstand 908 C hot water Step 6 WATER SUPPLY CONNECTION a 720 1 Connect the water supply hose to the valve behind dishwasher and the water tap as shown in figure Water tap This dishwasher may be fed with either hot or cold water If the water can not be maintained below 65 C the dishwasher must be connected to cold water 2 When connecting the seal
20. temperature will be up to 80 C Dual wash Auto Eco e When you select Rinse an additional rinse cycle is added Half Load n case of small load use upper or lower rack only to save energy With each press can select Upper or Lower rack only n case you don t select this button the machine always works vario washing which operate upper and lower spray arm alternately Child Lock Used to lock or unlock the control buttons to prevent all the setting from being changed by a child This function is automatically canceled when power failure occur For locking unlocking press Half Load and Rinse button for a few seconds simultaneously 9 Power For operating press this button first for power on After operating this button automatically switches off for safety and energy saving n case of irregular surge disturbance to the machine the power may be automatically turned off for safety Spray With each press the level of water jet is changed to Strong Medium and Soft in a sequence Delay Start f you want to delay the start of selected program press this button Pressing this button will increase time by 1 hour The delay start time can be adjusted from 1 hour to 19 hours 10 4 3 TEST MODE CHECK PROGRAM START IN THE STATE OF THE CLOSED DOOR The number of Checking points EWETON pushing button DIBPURE Load LED Half Load Rinse POWER Button 1 TIME 1n0H 1U00 All LEDs are li
21. tton Q UV If you want to sterilize the dishes press UV button After drying cycle sterilizer will be performed by UV lamp At this time St code is displayed in display window Cool Dry When you want better drying performance press this button This process is not part of the program After drying cycle the fan will operate for a few more minutes to diminish any remaining moisture At this time Cd code is displayed in display window f you want you can open the door and unload the dishes at any time Child Lock Refill with special salt Refill with rinse aid Time Left Before starting the display window shows the running time of the selected program After starting the display window shows the remaining time f the dishwasher has a trouble the trouble type is displayed OE EE TE EP HE GE ALIS tE e f this error letters are displayed please refer to the trouble shooting guide page 25 and follow the guide Beep On Off The dishwasher must be switched on The beep on off function can be set by pressing the Half Load and Spray button simultaneously for a few seconds Then a On will appear in the display The beep on off function is automatically canceled when power failure occur Rinse Repeated pressing of the Rinse button will select Extra Hot Rinse Extra Hot amp Rinse If you select the Extra Hot function the operating
22. ury Silver Titanium STS A RN Po TT TT T TT TT TT Lower Rack D1420 D1421 D1423 50 Fold down Removal type D1422 50 Fold down ion lv 3 PARTS NAME Control Panel Door Handle Front Cover Lower Cover Display Window Power Button Drain Hose Inlet Hose Power Cord 10 Adjustable Leg Accessory Upper Rack Cutlery Rack Detergent And Rinse Aid Dispenser 14 15 16 17 18 19 20 Vapor Vent Cover Upper Spray Arm Lower Spray Arm Filter ASM Lower Rack Salt Container Cap Cutlery Rack Funnel x The appearance and specifications may vary without notice e 4 FEATURES 8 TECHNICAL EXPLANATION 4 1 New Technology Introduction 4 1 1 High Temperature Rinsing Extra Hot function Sterilization Rate Condition f Over 2 minutes During the high temp Rinse course water 100 Oe Over 80 C temperature in an dishwasher reaches 80 C considerably higher than the average rinse temperature in conventional dishwashers 65 C This is how Rinse 80 C can eliminate some bacteria such as salmonella 50 Wash Rinse Dry Time With the Dual Wash System you can select different water pressure levels not only for the lower basket but also for the upper basket So you can get strong water pressure for the big pots in the lower basket and soft water pressure to protect your delicate or valuable dishes in the upper
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