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LG LDPH7972 Series Service Manual
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LG LDPH7972 Series Service Manual

LG LDPH7972 Series Service Manual

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DISHWASHER
SERVICE MANUAL
NOTE
READ THIS MANUAL CAREFULLY BEFORE SERVICING THE PRODUCT. FOLLOW
THE MANUAL'S INSTRUCTIONS WHEN SERVICING THE PRODUCT.
For Authorized Service Technicians
MODEL : LDPH7972*, LDTH7972*, SDWB24*3,
Any reproduction or duplication (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service
Manual. The material covered by prohibition includes, without limitation, any text, graphics or logos in this
Service Manual.
Copyright ⓒ 2022 - 2023 LG Electronics Inc. All rights
reserved. Only for training and service purposes.
LDPM6762*, LDPS6762*, LDPH5554*, LDPH6762*
LDTH5554*
CONFIDENTIAL

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Summary of Contents for LG LDPH7972 Series

  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
  • Page 2 CONTENTS 1. Important Safety Notice ..................3 2. Specifications ......................4 3. Product Overview ....................5 4. Principle of Operation ..................13 ■ Major Components .....................13 ■ Washing Process ......................21 5. Program Charts .....................22 6. Features and Operation ..................31 ■ Control Panel .......................31 ■...
  • Page 3 For Authorized Service Technicians 1. Important Safety Notice CAUTION ■ DISCONNECT POWER SUPPLY LINE BEFORE SERVICING ■ RECONNECT 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.
  • Page 4 For Authorized Service Technicians 2. Specifications ITEM SPECIFICATION Rated Voltage / Frequency AC 120V/60Hz Installation Built-In Place Settings Product Dimension (in.) (W) x 33 x (H) x 24 72-89 (LDPM6762*, LDPS6762*) 90-99 (LDPH7972*, LDTH7972*, SDWB24*3) Product Weight (lb.) 80-90 (LDPH5554*, LDTH5554*) 88 (LDPH6762*) Door Color Stainless Steel, Black(White) STS...
  • Page 5 For Authorized Service Technicians 3. Product Overview ■ Exterior Parts 1. For Models : LDPH7972*, LDPM6762*, LDPS6762*, LDPH5554*, LDPH6762* (Semi type) Shipping Brace Control Panel Front Time Drain Hose Indicator Front Cover Lower Cover Base 2. For Models : LDTH7972*, LDTH5554* (Fully type) Control Panel Shipping Brace...
  • Page 6 For Authorized Service Technicians ■ Exterior Parts 3. For Models : SDWB24*3 (Fully type) Shipping Brace Control Panel SignaLight™ Drain Hose Door Handle Front Cover Base Lower Cover - 6 -...
  • Page 7 For Authorized Service Technicians ■ Internal Parts (1) (Some Model will vary) Cutlery Rack Upper Rack Lower Rack Upper Spray Arm Lower Rack Silverware Basket - 7 -...
  • Page 8 For Authorized Service Technicians ■ Internal Parts (2) (Some Model will vary) Top Wash Impeller Cutlery /Upper Rack Rail Upper Rack Rail Water Guide Filtration System Heat Dry Blower Filtration System Lower Spray Arm Inner Filter Stainless Steel Filter ■ Accessory ①...
  • Page 9 For Authorized Service Technicians ■ Tub Assembly (Side) Air Guide Connector Roller Door Spring ■ Tub Assembly (Top) Shipping Brace Door Latch Main Felt - 9 -...
  • Page 10 For Authorized Service Technicians ■ Base Assembly (Some Model will vary) Heat Dry Blower Noise Filter Sump Main PCB Drain Motor - 10 -...
  • Page 11 For Authorized Service Technicians ■ Sump Assembly Casing Assembly, Pump Soil Sensor Thermistor Vario System Steam Hose Vario Disk Vario Cam Vario Motor Steam Check Valve - 11 -...
  • Page 12 For Authorized Service Technicians ■ Doorliner Assembly (External) Main Harness Casing Assembly, Fan Motor Vent Door Gasket ■ Doorliner Assembly (internal) Blower Cover Dispenser Steam Nozzle - 12 -...
  • Page 13 For Authorized Service Technicians 4. Principle of Operation Parts ■ Major Components 1) Drain Motor • Name: Drain Motor (Loc No.: M050) • Function: Drain water to the outside • Operating voltage: DC 310V • Resistance: 4.6Ω (measured between each terminal) •...
  • Page 14 For Authorized Service Technicians Parts 2) Air Guide • Name: Air Guide (Loc No.: F040) • Function: Detect the water supply • Operating voltage: DC 5V • Resistance: 9.8kΩ • Symptoms of failure ‐ IE : The Hall Sensor is defective so it can’t detect the water supply. ‐...
  • Page 15 For Authorized Service Technicians Parts 3) Vario Motor • Name: Vario Motor (Loc No.: M050) • Function: Adjust the water injecting position (Top Wash Impeller, Upper Vario Disk Spray Arm, Lower Spray Arm) • Operating voltage: AC 120V Vario Cam •...
  • Page 16 For Authorized Service Technicians Parts 4) Casing Assembly, Pump (Washing Motor) • Name: Casing Assembly, Pump (Loc No.: M030) • Function: The Washing Motor rotate the impeller to pump the water to spray arms. • Operating voltage: DC 310V • Resistance: 23.7Ω (Measured between each terminal) •...
  • Page 17 For Authorized Service Technicians Parts 5) Heater (Include in Casing Assembly, Pump) • Name: Heater (Include in Casing Assembly, Pump) • Function: Heat the water. • Operating voltage: AC 120V, 1200W • Resistance: 11.54Ω (Measured between each terminal) • Symptoms of failure ‐...
  • Page 18 For Authorized Service Technicians Parts 6) Thermistor • Name: Thermistor (Loc No. : M137) • Function: Measure the water temperature inside the pump • Operating voltage: DC 5V • Resistance: 10kΩ (measured in 77°F at room temperature) • Symptoms of failure ‐...
  • Page 19 For Authorized Service Technicians Parts 7) Door Latch • Name: Door Latch (Loc No. : F171) • Function: The Micro Switch detects the door’s closing or not • Symptoms of failure ‐ No power /Not working → The latch doesn't recognize the door closing and the product stops operating and powers off.
  • Page 20 For Authorized Service Technicians Parts 8) Heat Dry Blower (Fan module & Heater) • Name: Heat Dry Blower (Loc No. : M280) • Function: Spray hot air into the Tub. • Operating voltage : Fan module (DC 12V), Heater (AC 120V) •...
  • Page 21 For Authorized Service Technicians Washing Process ■ Washing Process Cycle Details Process Remove the large food particles before entering the Main Wash. Pre Wash Water Supply Wash Drain Add detergent and clean the dishes. Main Wash Steam Water Supply Add Detergent Wash Drain Rinse off any detergent and food debris from the dishes.
  • Page 22 For Authorized Service Technicians 5. Program Charts Program Charts ■ Program Charts C13 C14 C15 C16 Class 1 Class 2 Pre Wash 1 Pre Wash 2 Unit Energy Monitoring Drain Water Bubble Pre Wash 1 Etc Filter Cleaning Drain Water Chec RemoveTubPr Dete...
  • Page 23 For Authorized Service Technicians Program Charts C48 C49 C50 C51 C52 C53 C81 C82 C85 C86 C87 C88 re Wash 2 Pre Wash 3 Pre Wash 4 Water Pre Wash 2 Filter Cleaning Drain Water Pre Wash 3 Drain RemoveTubPr Simpl Simpl Simpl...
  • Page 24 For Authorized Service Technicians Program Charts C99 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C121 C122 C123 C124 C125 C126 C127 C128 C129 C130 C131 C132 C133 C134 C135 C136 C137 C138 C139 C140 C141 C142 C143 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 Wash Pre Wash 4 Pre Wash 5...
  • Page 25 For Authorized Service Technicians Program Charts C154 C155 C156 C157 C158 C159 C160 C161 C162 C163 C164 C165 C166 C167 C168 C169 C170 C171 C172 C173 C174 C175 C176 C177 C178 C179 C180 C181 C182 C183 C184 C185 C186 C187 C188 C189 C190 C191 C192 C193 C194 Main Wash Filter Cleaning Wash Steam...
  • Page 26 For Authorized Service Technicians Program Charts C195 C196 C197 C198 C199 C200 C201 C202 C203 C204 C205 C206 C207 C208 C209 C210C211 C212 C213 C214 C215 C216 C217 C218 C219 C220 C221 C222 C223 C224 C225 C226 C227 C228 C229 C230 C231 C232 C233 C234 C235 C236 C237...
  • Page 27 For Authorized Service Technicians Program Charts C247 C248 C249 C250 C251 C252 C253 C254 C255 C256 C257 C258 C259 C260 C261 C262 C263 C264 C265 C266 C267 C268 C269 C270 C271 C272 C273 C274 C275 C276 C277 C278 C279 C280 C281 C282 C283 C284 C285 C286 C287 C288 C289 C290 C291 C292 C293 C294 C295 C296 C297 C298 C299 C300 Rinse Rinse 2 Rinse 3...
  • Page 28 For Authorized Service Technicians Program Charts C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 C311 C312 C313 C314 C315 C316 C317 C318 C319 C320 C321 C322 C323 C324 C325 C326 C327 C328 C329 C330 C331 C332 C333 C334 C335 C336 C337...
  • Page 29 For Authorized Service Technicians Program Charts C349 C350 C351 C352 C353 C354 C 355 C356 C357 C358 C359 C360 C361 C362 C363C364 C365 C366 C367 C368 C369 C370 C371 C372 C373 C374 C375 C376 C377 C378 C379 C380 C381 Additional operation Additional operation Drain Drain...
  • Page 30 For Authorized Service Technicians Program Charts C382 C383 C384 C385 C386 C387 "High Temp" "High Temp" "Steam" "High Temp" "Steam" & "Steam" "Heat Dry High" & "Steam" & "Heat Dry Low" & "Heat Dry High" & "Heat Dry High" & "Heat Dry Low" &...
  • Page 31 us_main.book.book Page 24 Wednesday, September 7, 2022 8:00 AM For Authorized Service Technicians 24 OPERATION 6. Features and Operation Control Panel Control Panel Functions and Features Control Panel Features ■ Control Panel Top view Top view Front view Power On/Off Button •...
  • Page 32 For Authorized Service Technicians us_main.book.book Page 25 Wednesday, September 7, 2022 8:00 AM Control Panel OPERATION • Machine Clean - The Machine Clean LED flashes every 30 cycles. To activate or deactivate the LED, refer to the Using the Option Setting Mode topic. •...
  • Page 33 (except the Use a dedicated cycle downloadable via Wi-Fi or Refresh cycle). If the dishwasher could not NFC. You must install the LG ThinQ smartphone properly sanitize the dishes because the Steam app to download cycles other than the default option was not selected, the cycle was interrupted Machine Clean cycle.
  • Page 34 For Authorized Service Technicians us_main.book.book Page 27 Wednesday, September 7, 2022 8:00 AM Control Panel OPERATION cycles on a certified machine have passed the • If the rinse aid dispenser is empty, the Dry Boost sanitization performance test. Low option is automatically added to all cycles (except the Normal, 1 Hour cycle), unless you set the rinse aid dispenser to L0.
  • Page 35 For Authorized Service Technicians us_main.book.book Page 28 Wednesday, September 7, 2022 8:00 AM Control Panel 28 OPERATION Press Power and Remote Start • End Sound simultaneously to enter the Option Setting - You can turn on/off the End sound. Mode. Refer to the table to set up each function.
  • Page 36 For Authorized Service Technicians us_main.book.book Page 23 Wednesday, September 7, 2022 8:00 AM OPERATION OPERATION ■ Before Using Before Using WARNING • To reduce the risk of fire, electric shock, or injury to persons, read the SAFETY INSTRUCTIONS before operating this appliance. NOTE •...
  • Page 37 For Authorized Service Technicians • End Sound Before Using Setting - You can turn on/off the End sound. nction. us_main.book.book Page 29 Wednesday, September 7, 2022 8:00 AM Loading the Dishwasher Proper loading The extra tall tub allows loading of dishes, pans, or other utensils up to 14"...
  • Page 38 For Authorized Service Technicians us_main.book.book Page 30 Wednesday, September 7, 2022 8:00 AM er 7, 2022 8:00 AM Before Using 30 OPERATION OPERATION Loading the Upper Rack Loading the Lower Rack e Basket For more d manual. Loading Dishes into the Upper Rack Loading Dishes into the Lower Rack Folding Loading 10 Place Settings...
  • Page 39 For Authorized Service Technicians r 7, 2022 8:00 AM us_main.book.book Page 31 Wednesday, September 7, 2022 8:00 AM Before Using For more details, refer to the online owner's the middle rack or spoon basket for best WARN manual. performance. • Be carefu per Rack with shar Loading Silverware into the Cutlery...
  • Page 40 For Authorized Service Technicians mber 7, 2022 8:00 AM us_main.book.book Page 32 Wednesday, September 7, 2022 8:00 AM Before Using OPERATION 32 OPERATION r best WARNING CAUTION • Be careful when loading and unloading items • To avoid damaging the dispenser and blower with sharp edges.
  • Page 41 For Authorized Service Technicians 2022 8:00 AM Press Power and Remote Start simultaneously to enter the Option Setting Mode. ower se the Press Dry Boost to change the rinse aid dispenser setting. Each press of the button changes the setting one step from L0 to L4. Once the desired rinse aid dispenser setting is selected, press Start to save.
  • Page 42 For Authorized Service Technicians us_main.book.book Page 36 Wednesday, September 7, 2022 8:00 AM Maintenance 36 MAINTENANCE ■ Maintenance MAINTENANCE To maintain performance and prevent trouble, it is important to check the outside and inside of the dishwasher, including filters and spray arms, at regular intervals. WARNING •...
  • Page 43 For Authorized Service Technicians us_main.book.book Page 37 Wednesday, September 7, 2022 8:00 AM Maintenance MAINTENANCE the cleaning or repair of the external drain air • In areas with hard water, clean the filter at least gap and disposal. once a month with a soft brush. •...
  • Page 44 For Authorized Service Technicians us_main.book.book Page 38 Wednesday, September 7, 2022 8:00 AM Maintenance 38 MAINTENANCE If any food residue blocks the spray arm NOTE holes, remove it with a pin or piece of stiff wire. • Make sure the filter is assembled correctly before starting a cycle.
  • Page 45 For Authorized Service Technicians us_main.book.book Page 39 Wednesday, September 7, 2022 8:00 AM Maintenance MAINTENANCE After removing the food residue, clean the • To avoid electric shock, do not put your hand spray arms under running water. inside the heat dry blower tube. •...
  • Page 46 For Authorized Service Technicians us_main.book.book Page 40 Wednesday, September 7, 2022 8:00 AM Maintenance 40 MAINTENANCE To reassemble the vent cover, place it over the supply tube in the same orientation as it was removed (about 2 o’clock). Turn the cover counterclockwise until it clicks into place.
  • Page 47 For Authorized Service Technicians Control Mode ■ Control Mode 1) LQC Control Mode Times button is Load and Checking points Door open/ BUTTON Top Display Remark pushed Load LED lighting closed POWER n**/U** "nC" will be + AUTO 1 TIME /D** All LED are lit Either...
  • Page 48 For Authorized Service Technicians Control Mode 2) Manual Control Mode Test Mode Start : POWER + 1 Hour + Download Cycle press for 3 seconds Door Fan RPM (+100) : 3s ↓ Heater (Heat Dry) Soil Level Heater (Wash) Vario Washing motor Door Fan On/Off : 3s ↑...
  • Page 49 For Authorized Service Technicians 7. How to Disassemble Preparation in advance ■ Before disassembling the product Follow the steps below before disassembling the product. ① Remove all the dishes stored in the product. ② Use control mode to remove residual water in the product.
  • Page 50 For Authorized Service Technicians Hose and Power ■ Hose and Power 1. Drain Hose & Inlet Hose ① Remove the clamp fixing the Drain Hose, and pull the Drain Hose to disconnect it. ② Disconnect the Inlet Hose. ③ Remove the 2 screws and remove the Lower Cover. ④...
  • Page 51 For Authorized Service Technicians Exterior Parts ■ Exterior Parts 1. Front Cover ① Open the door, remove the 10 screws, and remove the Front Cover. (Semi type) ② Open the door, remove the 12 screws, and remove the Front Cover. (Fully type) Assembly When Assembling, Align the holes on the Doorliner and Front Cover.
  • Page 52 For Authorized Service Technicians Doorliner ■ Doorliner 1. Vent and Casing Assembly, Fan Motor ① Remove a screw of duct. Vent ② Pull the Vent down to remove it. ③ Disconnect the 2 connectors. ④ Remove the Blower Cover. - Insert Flathead screwdriver in hole (A). - Rotate Flathead screwdriver carefully.
  • Page 53 For Authorized Service Technicians Doorliner 2. Disassembling the Dispenser ① After removing the Front Cover, remove the white EPS packing attached to the dispenser. ② Disconnect the 2 connectors of dispenser. ③ Insert the JIGs on 3 sides as shown in the photo3. ④...
  • Page 54 For Authorized Service Technicians Doorliner 4. Lower Frame ① First of all, remove the front cover and vent ② Remove the 2 screws. ③ Remove the lower frame. ④ Remove the main harness hooks. ⑤ Remove the overflow hose from the lower frame. Assembly When assembling, assemble the lower frame to the Tub as shown.
  • Page 55 For Authorized Service Technicians Doorliner 6. Door Spring ① The Door Spring is connected with a Connector from Connector the back of the Base to the Doorliner Hinge. Hinge ② With the door closed, lift the connector up to remove Door Spring ③...
  • Page 56 For Authorized Service Technicians Air Guide ■ Air Guide 1. Hall Sensor ① Press the hook inside the hall sensor and remove the Hall Sensor. ② Disconnect the connector. Assembly Assemble in the reverse order of disassembly. 2. Air Guide ①...
  • Page 57 For Authorized Service Technicians ■ Tub 1. Heat Dry Blower ① Lift the hook using a flathead screwdriver as shown in the image ② Turn the Heat Dry Blower clockwise by 30 degrees and lift it up. ③ Using a tool, turn the nut counter-clockwise to remove Assembly Assemble in the reverse order of disassembly.
  • Page 58 For Authorized Service Technicians 3. Top Wash Impeller and Water Guide ① With the Lower Spray Arm removed, remove the bottom clip of the Water Guide by removing a screw. ② Use a flathead screwdriver to open the 2 brackets connecting the Top Wash Impeller.
  • Page 59 For Authorized Service Technicians 4-2. Upper Rack (Glide rail type) ① Pull out the Upper Rack. ② Place a flathead screwdriver into the hooks on the front of the rack. ③ Spin a flathead screwdriver to open the front hooks. ④...
  • Page 60 For Authorized Service Technicians 5. Cutlery Rack and Rail ① Lift the Cutlery Rack to remove it. ② Remove the Rack Rails. (The rail removal method is the same as the upper rack normal rail removal method.) Assembly Assemble in the reverse order of disassembly.
  • Page 61 For Authorized Service Technicians 7. Tub Packing ① Pull and remove the tub packing ② When assembling Tub packing, the starting point is locate between the two forming shapes located at the bottom of the Tub. Caution Make sure the Tub Packing is seated properly on the Tub.
  • Page 62 For Authorized Service Technicians Base ■ Base 1-1. Main PCB (For Models : LDPH7972*, LDPM6762*, LDPS6762*, LDTH7972*, SDWB24*3) ① Remove from the hook using a flat-blade screwdriver. ② Carefully remove the main PCB from the base ③ Remove a screw. ④...
  • Page 63 For Authorized Service Technicians Base 2. Sump Cover ① Remove the Lower Spray Arm. ② Remove the clip and lift the Water Guide. ③ Remove the 7 screws and remove the Sump Cover. Assembly Assemble in the reverse order of disassembly.
  • Page 64 For Authorized Service Technicians Base 4. Base ① Remove the Lower Frame and disconnect all connectors. ② Remove the Heat Dry Blower and nut. ③ Remove the Sump Cover. ④ Remove the 2 screws on the back of the product. ⑤...
  • Page 65 For Authorized Service Technicians Base 5. Sump ① With the base separated, disconnect the connectors connected to the Vario Motor and Micro Switch. ② Remove the housing and disconnect a connector connected to the Casing Assembly, Pump ③ Disconnect the connector connected to the Drain Pump.
  • Page 66 For Authorized Service Technicians Base 7. Casing Assembly, Pump ① Lay down the product and open the hooks to remove the right base cabinet. ② Remove the 2 clamps connected to the Sump. ③ Remove a clamp connected to the Steam Hose. ④...
  • Page 67 For Authorized Service Technicians 8. Troubleshooting Methods Error Message ■ Error Message Detecting Detecting Error massage Operation Cause Solution zone condition LEAKAGE ERROR Anytime (Power When the Float repeat for 30 1. The Door gasket came loose or 1. Replace the Doorliner On/Off) Switch is operated seconds of drain...
  • Page 68 For Authorized Service Technicians Error Message Detecting Detecting Error massage Operation Cause Solution zone condition THERMAL ERROR Power On When the All loads are 1. Wiring connection is OK? 1. Check and reconnect the wire. Thermistor is turned off. 2. The Thermistor is OK? 2.
  • Page 69 For Authorized Service Technicians Troubleshooting Methods ■ Troubleshooting Methods 1. AE error If a leak occurs inside the product, an 'AE' error is caused by the float switch to prevent safety and additional damage. When a leak occurs within the product, it falls into the Base and the water collects into the float switch. And the float switch detects a water leak in the Base, stops the product, and repeats drain operation.
  • Page 70 For Authorized Service Technicians Troubleshooting Methods 1) Inspection and repair flow chart Leaks or AE error AE error does not occur Check the ‘AE’ error Leakage around the product Door leaks Remove the Lower Cover Leakage from Drain Hose Wrong loading of dishes connection Check the water in the Base Upper Rack not seated...
  • Page 71 For Authorized Service Technicians Troubleshooting Methods 2) Base flooding position by leaks point - Check the location of the flooding in the Base during the first diagnosis, and then check the expected defective parts. Front Flooding Flow path Defective symptoms Defective part &...
  • Page 72 For Authorized Service Technicians Troubleshooting Methods 3) ‘AE’ error Inspection process Check the ‘AE’ error Remove the product Remove the Lower Cover Make sure the display shows an Remove the Power Cord for product Remove the 2 screws and remove ‘AE' error.
  • Page 73 For Authorized Service Technicians Troubleshooting Methods 4) Defect cause and Solution Place of part Reason Flooding Normal Abnormal Solution leakage Position Reassemble it The cap was not If the gasket is damaged, properly replace the parts. assembled. If the Drain Hose is Air Guide reassembled, a leakage may occur due to...
  • Page 74 For Authorized Service Technicians Troubleshooting Methods Place of part Reason Flooding Normal Abnormal Solution leakage Position The Sump gasket P1, P2, Replace the part. was damaged The hose was not properly assembled Reassemble it. (Sump & Casing Assembly, Pump) The connector Sump Replace the part.
  • Page 75 For Authorized Service Technicians Troubleshooting Methods Place of part Reason Flooding Normal Abnormal Solution leakage Position Blower Cover was Reassemble it, not properly P1, P2, If the part is damaged, assembled, replace it Gasket damaged Duct assembled Doorliner Reassemble it not properly Dispenser Reassemble it...
  • Page 76 For Authorized Service Technicians Troubleshooting Methods Place of part Reason Flooding Normal Abnormal Solution leakage Position Upper spray arm does not spray water normally Explain the correct way to Misuse due to the load the plates. blockage of the wrong dish loading.
  • Page 77 For Authorized Service Technicians Troubleshooting Methods 2. FE error FE error is displayed Check the water supply Replace the Inlet Hose Is the water supply still The valve is closed, but the debris is working if the product is not causing leakage.
  • Page 78 For Authorized Service Technicians Troubleshooting Methods 3. IE error Check the water tap Is the water tap opened? Open the water tap 1) Open the water tap Check the Inlet Hose Is the Inlet Hose kinked? Repair the Inlet Hose 1) Repair or straighten the Inlet Hose Check the water supply Is water supplied to the unit?
  • Page 79 For Authorized Service Technicians Troubleshooting Methods Clean the filter of inlet value Check the inside of Valve Is housing connected? 1) Clean the filter of inlet valve (1) Close the water tap (2) Unscrew the Inlet Hose.(Inlet valve side) (3) Clean the filter of inlet valve Adjust the water pressure Check the water pressure Is the water pressure very low or...
  • Page 80 For Authorized Service Technicians Troubleshooting Methods 4. OE error Check the Filter, Air Gap & Disposal Is the Filter, Air Gap & Disposal clogged? Clean the Filter Filter 1) Clean the filter Is the Filter clogged? Clean the Air Gap Air Gap 1) Clean the air Is the Air gap clogged?
  • Page 81 For Authorized Service Technicians Troubleshooting Methods Check the Drain pump & Main PCB Has Drain pump RPM increased? Make sure the housing connection is intact Drain pump 1) Housing connection Is Housing connection intact? - If housing is not connected, please connect the housing Remove the debris Drain pump...
  • Page 82 For Authorized Service Technicians Troubleshooting Methods 5. bE error Check the detergent Is the detergent for dishwasher only? Make sure customers use proper detergent 1) Only use detergents which are designed for dishwashers Check the initial water level 2) Remove suds and soap residue - Pour milk in a bowl and place on the upper Is the water level not near the center of Tub rack.
  • Page 83 For Authorized Service Technicians Troubleshooting Methods 6. tE error Check the Thermistor Reconnect the wire and replace the Thermistor Is it working properly? 1) Reconnect the wire 2) Replace the Thermistor - The Resistance is 8~44KΩ. (If is not, replace the Hall Sensor) You can measure and replace the Thermistor after the Main PCB has been removed from the Base.
  • Page 84 For Authorized Service Technicians Troubleshooting Methods 7. HE error Check Heater operation Is the heater not operating during course or Control Mode? Heater (Casing assembly, Pump) Heater does not operate normally Check the heater of Casing Assembly, Pump 1) Reassemble the Heater Connector - Reassemble the Heater Connector when the Heater connector is removed or not connected properly.
  • Page 85 For Authorized Service Technicians Troubleshooting Methods 8. LE error Check the operation of the Washing Motor Is the Washing Motor not operating during course or Motor Control Mode? Washing Motor Check the Washing Motor of Casing Assembly, Pump 1) Reassemble the Washing Motor connector The Washing Motor is not running.
  • Page 86 For Authorized Service Technicians Troubleshooting Methods 9. nE error Check the Vario Motor & Micro Switch Can you hear the Micro Switch operating sound when you enter the LQC Control Mode? Sensing check on Micro Switch Check the Micro Switch of Vario system Micro Switch cannot detect motion and 1) Reassemble the Micro Switch connector position.
  • Page 87 For Authorized Service Technicians Troubleshooting Methods 10. F31, F35 error Heat Dry Module error F31 error occur Did the F31 error occur? Check the Fan Module Reconnect the wire and replace the Fan Module 1) Reconnect the wire of Fan Module and Main PCB Fan Module does not operate.
  • Page 88 For Authorized Service Technicians Troubleshooting Methods 11. No power & Not working No error codes for power or non-functional faults. There are many intermittent defects, so it is difficult to check the defect during the test. Various defective symptoms appear and various parts are related, so accurate symptom confirmation is required.
  • Page 89 For Authorized Service Technicians Troubleshooting Methods 2) Repair methods by defect symptom ► The power button is not recognized Check point Solution Is the cause of the defect an • Blackout environmental factor? • Circuit breaker • Outlet voltage instability, wiring problem •...
  • Page 90 For Authorized Service Technicians Troubleshooting Methods ► After the operation of the product is completed, the power will not turn on when the product is restarted Check point Solution Replace the Control Panel assembly Does it power on aftering • Control panel Display PCB internal damage causes no power on disconnecting and reconnecting the power cord?
  • Page 91 For Authorized Service Technicians Troubleshooting Methods ► Dishwasher turns off intermittently Check point Solution Explain the cancel feature to customers Does the Display show “- - -" and • Cancel feature The display shows --- when the cancel function and the drain pump work is operated by pressing the start button for 3seconds Adjust the Upper Rack so that it is horizontal Does the door interfere with the...
  • Page 92 For Authorized Service Technicians Troubleshooting Methods ► Turns off at a certain points during operation Check point Solution Explain the cancel feature to customers • Press the start button for Did the cancel function work? more than 3 seconds to check if the cancel function has been activated.
  • Page 93 For Authorized Service Technicians Troubleshooting Methods ► ‘CL’ is displayed on the display window and the button is not working. Check point Solution Explain the control lock feature to customers Control lock is set • Option settings Explain the control lock feature to customers - 93 -...
  • Page 94 For Authorized Service Technicians Troubleshooting Methods ► Touch button is not recognized Beeps or display flickers whether or not it is in use Check point Solution Replace the Control Panel assembly Check the detailed symptoms • Control panel 1) When attaching the Display PCB to the panel, the from the customer touch pad does not transmit signals properly due Difficult to check easily in the field...
  • Page 95 For Authorized Service Technicians Troubleshooting Methods 12. Not Clean No error codes for Not Clean problem. Various parts are related, so accurate type of not cleaning confirmation is required. This SVC bulletin summarizes the not clean caused by each reason. Check and replace the affected parts and explain customer how to use the dishwasher 1) Type of Not cleaning Type of Not...
  • Page 96 For Authorized Service Technicians Troubleshooting Methods ※ Before or After SVC, Give some tips to all the customers 1) Change detergents - If Customer is using Liquid or Powder type detergent, Guide them to use Tablet or Gel type detergent 2) Change the cycles - If customer typically uses “Normal“...
  • Page 97 For Authorized Service Technicians Troubleshooting Methods 2) Food particles remains ► Cause 1. Nozzle has problem • Lower Spray Arm disassembled by dishes constraint ► Solution 1. How to check the nozzle • Check the Lower Spray Arm is broken or doesn’t rotate well 2.
  • Page 98 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Nozzle has problem 1. How to check the nozzle and replace the part • Upper Spray Arm disassembled or interfere 1) Check the Upper Spray Arm is broken or doesn’t rotate well with rack 2.
  • Page 99 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Nozzle has problem 1. How to check the nozzle • Top Wash Impeller was broken 1) Check the Top Wash Impeller is broken 2. How to replace the part 1) SVC Loc no. : F192 2) How to disassemble ①...
  • Page 100 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Casing ASM, Pump has problem 1. How to check the Casing ASM, Pump • Casing ASM, Pump does not work 1) Turn on the unit, then start “Normal” cycle 2) Wait for a moment, then check the water spray sound 2.
  • Page 101 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Packed dishes together 1. Make customer does not packed dishes together 2. Make customer load dishes does not interfere the nozzle 2. Utensils interfere the nozzle Type of Not Cleaning Food Particles remains Detergents remains Nozzle or Casing ASM,...
  • Page 102 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Filter clogged 1. How to clean the filter / Run Machine clean cycle • For best wash performance, clean the filter 1) Remove the lower rack and position the bottom spray arm so a wider after each load.
  • Page 103 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Filter clogged 1. How to clean the filter / Run Machine clean cycle • For best wash performance, clean the filter 4) To replace the assembled filters, position the spray arm so the wider after each load.
  • Page 104 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Customer doesn’t scrap 1. Recommend customer to scrap before running cycle • If large food particles are not removed, it can lead to a decrease in washing performance and clogging of the drain. Type of Not Cleaning Food Particles remains Detergents remains...
  • Page 105 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Hard water 1. Give some tips to the customer • Hard water means water that contains a lot 1) Use detergent tablets with water softening ingredients or use a water of calcium or magnesium ions.
  • Page 106 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Too much detergents 1. Guide the customer appropriate amount of detergent • Too much detergents may cause white 1) Guide the customer that the amount of detergent does not exceed stains remaining problem the Recommended Limit Line below (Refer to the below photo) Recommended Limit Line...
  • Page 107 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Dispenser does not work 1. How to check the Dispenser • If the dispenser lid is not opened, ※ Before Serial no. 106XX Detergent will remain Models Enter the LQC Control Mode Dispenser working LDF5678**, LDT5678**, Power + Auto + Start...
  • Page 108 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Dispenser does not work 2. Check the connector / How to replace the parts • If the Dispenser lid is not opened, 1) If Dispenser does not working.(lid not opened) Detergent will remain Check the Connector connection and connect 2) If connection is right, Replace the dispenser...
  • Page 109 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Put the detergents with wet hands 1. Make customer do not put the detergents with wet hands • Putting the detergent with wet hands may 1) Do not put detergent with wet hands. And remove any moisture from cause detergents remains in the dispenser the detergent dispenser before put the detergent (Only Tablet type detergent)
  • Page 110 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Using dish soap 1. Make customer to do not use hand dishwashing liquids. Only use detergents which are designed for use in automatic • If customer use dish soap, too much dishwashers.
  • Page 111 For Authorized Service Technicians Troubleshooting Methods 13. Not Drying No error codes for Not Drying problem. Various parts and various reasons are related, so accurate symptom confirmation is required. This SVC bulletin summarized the symptoms caused by each reasons. Check and replace the affected parts or Explain customer how to use the dishwasher 1) Failure symptoms by type of not drying Type of Not...
  • Page 112 For Authorized Service Technicians Troubleshooting Methods ※ Before or After SVC, Give some tips to all the customers 1) If the model has “High Temp, Extra Dry” functions, add this options to the cycle. 2) If running the dishwasher all night long, add the “Night Dry” option to the cycle. 3) If customers are not using the rinse aid, we recommend using them.
  • Page 113 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Heater does not work 1. How to check the Heater • Heater does not work. Because of the Water Heater connection problem or Electrical Short or Models Enter the LQC Control Mode Inlet On/ On/Off Damage...
  • Page 114 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Heater does not work 1. How to check the Heater • Heater does not work. Because of the (3) Refer to the Page 5 table and turn on the Heater On Key connection problem or Electrical Short or Damage (4) Check the number on the digital display, If Heater is normal, It...
  • Page 115 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Heater does not work 2. Check the connector / How to replace the parts. • Heater does not work. Because of the 1) If housing is disconnected, Connect connector connection problem or Electrical Short or Damage 2) Replace the Casing ASM, Pump(SVC Loc.
  • Page 116 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Blower does not work(XD) 1. How to check the Blower • Blower does not work Because of Acutator ※ Before Serial no. 106XX problem, Fan motor problem, Vent Problem Fan motor and Models Enter the LQC Control Mode actuator working...
  • Page 117 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Blower does not work(XD) 2. Check the Connector / How to replace the parts • Blower does not work Because of Acutator 1) If connector is disconnected, connect(refer below photo) problem, Fan motor problem, Vent Problem 2) Replace the Blower (1) SVC Loc no.
  • Page 118 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Blower does not work(XN) 1. How to check the Blower • Blower does not work Because of Acutator Fan motor and Models Enter the LQC Control Mode problem, Fan motor problem, Vent Problem actuator working Press Start All Heated air dry models...
  • Page 119 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Dispenser does not work 1. How to check the Dispenser • Dispenser does not work. So, Rinse may 1) Check the dispenser working not put in the unit. (1) Close the Dispenser Lid and Open the door wide (2) Close the door (3) Enter the LQC Control Mode (Refer to the Page 8) and press Start button 1 Time...
  • Page 120 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Dispenser does not work 2. Check the connector / How to replace the parts • Dispenser does not work. So, Rinse may 1) If Dispenser does not working.(lid not opened or rinse not poured) not put in the unit.
  • Page 121 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Heated air dry module does not work 1. How to check the Heated air dry module • If Heated air dry module does not work, It Heater(Heat dry) Models Enter the LQC Control Mode reduces Drying performance On/Off Power + 1 Hour + Download...
  • Page 122 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Cusotmer doesn’t use Rinse aid 1. Recommend customer to use Rinse aid and Set Rinse level • The use of rinse aid is recommended to 1) Recommend customer to use Rinse aid prevent water spots on dishes and to enhance drying performance.
  • Page 123 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Packed dishes together 1. Make customer does not packed dishes together 2. Utensils interfere the nozzle 2. Make customer load dishes does not interfere the nozzle Type of Not Drying Totally Wet Heated air dry module (Dishes, Racks and Walls)
  • Page 124 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Walls only wet or Plastic dishes wet 1. Unit is normal, Please give some tips for customer • It is not totally wet, just walls only wet or 1) If the model has “High Temp, Extra Dry” functions, add this options plastic dishes wet to the cycle.
  • Page 125 For Authorized Service Technicians Troubleshooting Methods 14. Noise Problem No error codes for noise problem. Various noise appear and various parts are related, so accurate type of noise confirmation is required. This SVC bulletin summarizes the noise caused by each parts. Check and replace the affected parts 1) Failure by type of noise Type of noise Failure Cases...
  • Page 126 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Casing ASM, Pump has problem 1. How to check the Casing ASM, Pump • Grinding noise may occur due to water 1) Turn on the unit, than start “Normal” cycle leakage from the washing motor water seal.
  • Page 127 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Vario disk has problem 1. How to check the Vario disk • If vibration occurs during washing, replace 1) Turn on the unit, start “Normal” cycle the Vario disk as it is deformed 2) Then Check the vibration noise 2.
  • Page 128 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Inlet valve has problem 1. How to check the Inlet Valve • If Inlet valve filter is clogged, High pitch 1) Turn on the unit, start “Normal” cycle noise occur 2) During water supply, check the high-pitch noise 2.
  • Page 129 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Valve problem 1. Explain customer about Valve problem • If there is a valve as below, water will not 1) Explain customer that Unit is normal and Valve has problem. supply properly and make water hammer Refer to the below photos noise due to water pressure...
  • Page 130 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Blower(Door casing ASM) has 1. How to check the Blower problem(XD) ※ Before Serial no. 106XX • Impeller that in the Door casing ASM may Fan motor and interfere with Casing. It can make rattling Models Enter the LQC Control Mode actuator working...
  • Page 131 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Blower(Door casing ASM) has 2. How to replace the parts problem(XD) 1) Replace the Blower • Impeller that in the Door casing ASM may (1) SVC Loc no. : K110(Blower) interfere with Casing.
  • Page 132 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 2. Blower(Door casing ASM) has 1. How to check the Blower problem(XN) Fan motor and Models Enter the LQC Control Mode • Impeller that in the Door casing ASM may actuator working interfere with Casing.
  • Page 133 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 3. Drian pump constraint 1. How to Check the Drain pump • Some debris are stuck inside of Drain 1) Check the Drain Pump pump. It can make rattling noise (1) First, Start “Normal” cycle (2) Then, Check the rattling noise when drain pump working Type of Not Drying Grinding...
  • Page 134 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 3. Drian pump constraint 2. Remove the debris from the drain pump • Some debris are stuck inside of Drain 1) SVC Loc. No : M050 ① ② ③ ④ pump. It can make rattling noise 2) Refer to the below for the disassemble Harness Holder ①...
  • Page 135 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 4. Drian Hose is not secured 4. Check the Drain Hose and Tighten the hose • If Drain Hose is not secured, It can make 1) Tighten the hose noies Type of Not Drying Grinding Hammering Vibration...
  • Page 136 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 5. Dishes interfere 5. Guide customer how to load dishes • Utensils interfere with nozzle 1) Make customer does not intere the nozzle Type of Not Drying Grinding Hammering Vibration Rattling High Pitch Growling - 136 -...
  • Page 137 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 6. Filter out of the unit 6. Reassemble the Filter • If Filter is not secured properly, It may 1) Reassemble the Filter and Guide customer how to assemble the cause interfere with Lower Spray Arm Filter ※...
  • Page 138 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Using Liquid Detergent 1. Guide customers to do not use liquid detergent • Liquid dishwashing soap, like what is used 1) Guide customers to do not use liquid detergent in a sink. This is much more strongly (Tablet type or Gel type are recommended) concentrated and will resut in oversudsing.
  • Page 139 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 2. Load the bowl or pots facing upwards 2. Explain customer how to load the dishes 1) Large bowls or pots need to store facing downwards • If the large pots or bowls are stored facing upwards, most of the washing water will end up in the pots during the washing process, there may be a shortage of water...
  • Page 140 For Authorized Service Technicians Troubleshooting Methods 15. Oder Problem No error codes for odor problem. Various odor appear and various parts are related, so accurate type of odor confirmation is required. This SVC bulletin summarizes the odor caused by each reason. Check and replace the affected parts and explain customer how to use the dishwasher 1) Failure by type of odor Type of noise...
  • Page 141 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Power cord is burnt 1. Replace the power cord 1) Turn off electrical power to the unit at the circuit breaker. • Improper connection of connector(wire nut) 2) Use a Phillips screwdriver to remove the can cause burnt odor screw from the junction box cover and remove the cover...
  • Page 142 For Authorized Service Technicians Failure Cases Solution 1. Power cord is burnt 1. Replace the power cord 7) Pull the existing wires through the openings in the junction box. Tighten 2 screws ④ to • Improper connection of connector(wire nut) can cause burnt odor reassemble the junction box in the appliance.
  • Page 143 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 2. Casing ASM, Pump defcet 2. Replace the Casing ASM, Pump • Defect of the Casing ASM Pump may occur 1) SVC Loc. No : M030 due to water leakage from the washing 2) Refer to the below for the replacement motor water seal.
  • Page 144 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 3. Drain Pump defect 3. Replace the Drain Pump • Defect of the Drain Pump may occur due to 1) SVC Loc. No : M050 water leakage from the seal 2) Refer to the below for the replacement ①...
  • Page 145 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 4. Main PCB defect 4. Replace the Main PCB • Defect of the Main PCB may occur due to 1) SVC Loc. No : K254 Overcurrent 2) Refer to the below for the replacement ①...
  • Page 146 For Authorized Service Technicians Failure Cases Solution 5. Vario motor is burnt 5. Replace the Vario motor • Vario motor burnt may occur due to due to 1) SVC Loc. No : M026 water leakage from the seal. 2) Refer to the below for the replacement ①...
  • Page 147 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Machine is newly installed 1. Explain customer that newly installed machine have odor • It is normal for a new unit to have odors for 1) Recommend customers to use the unit more than 20 fully cycles. the first few times they are operated.
  • Page 148 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Food debris in the unit 1. Remove the debris in the unit. Run Machine clean cycle • Food debris may cause an odor 1) Remove the debris in the unit. Then, Run Machine clean cycle using dishwasher cleaner.
  • Page 149 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Food debris in the unit 1. Clean the filter and Run Machine clean cycle • For best wash performance, clean the filter 1) Remove the lower rack and position the bottom spray arm so a wider after each load.
  • Page 150 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Food debris in the unit 1. Clean the filter and Run Machine clean cycle • For best wash performance, clean the filter 4) To replace the assembled filters, position the spray arm so the wider after each load.
  • Page 151 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Long term unused 1. Run Machine Clean Cycle • If the unit is unused for a long time, odor 1) Run Machine clean cycle using dishwasher cleaner. Refer to the can occur from the food residue, particles, photos below for recommended cleaner.
  • Page 152 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Detergents 1. Recommend customers to change the detergents. • Some of detergents may cause a musty 1) Recommend customer to change the detergents water odor Type of Not Drying Burning Musty Water Parts problem Detergents...
  • Page 153 For Authorized Service Technicians Troubleshooting Methods Failure Cases Solution 1. Drain hose is installed improperly 1. Install the drain hose properly • Drain hose needs to be installed in a High 1) Install the drain hose properly. Please refer to the bleow photo. Loop.
  • Page 154 For Authorized Service Technicians 9. Customer Guide Why do white stains occur on dishes after washing? 1. Why do white stains occur on dishes after washing? Customer Guide As the water evaporates, nutrients that were dissolved in the water and invisible become visible on the surface of the dishes, appearing as white stains.
  • Page 155 For Authorized Service Technicians Why are there water stains on the cups or glassware after washing? 2. Why are there water stains on the cups or glassware after washing? Customer Guide As the water dries, nutrients that were not visible remain on the surface of the bowl and are shown as water marks.
  • Page 156 For Authorized Service Technicians There are food debris on the dishes 3. There are food debris on the dishes (1/2) Customer Guide If there is a lot of food on the bowl, you can rinse them with water first. When you put the dishes in the dishwasher, tilt them about 45 degrees.
  • Page 157 For Authorized Service Technicians There are food debris on the dishes 3. There are food debris on the dishes (2/2) Details information ※ Tableware Storage Method - Store the dishes without stacking them together. - Deep pots or dishes should be placed upside down. - Store the large pots and pans flat.
  • Page 158 For Authorized Service Technicians Detergent is still in the dispenser 4. Detergent is still in the dispenser Customer Guide The package of the solid detergent’s can become sticky like glue when it meets water, and may not be inserted properly and remain in the dispenser. If you are using the solid detergent, put it in with dry hands or remove the moisture from the dispenser before using it.
  • Page 159 For Authorized Service Technicians Noise during water supply and drainage 5. Noise during water supply and drainage • Noise while supplying water (whistling sound) When the speed of the water flowing through the pipe changes suddenly, a water sound is created due to the pressure change.
  • Page 160 For Authorized Service Technicians 10. WIRING DIAGRAM WIRING DIAGRAM ■ WIRING DIAGRAM 1) For Models : LDPH7972*, LDPM6762*, LDPS6762*, LDTH7972*, SDWB24*3 - 160 -...
  • Page 161 For Authorized Service Technicians 2) For Models : LDPH5554*, LDTH5554*, LDPH6762* - 161 -...
  • Page 162 For Authorized Service Technicians Main PCB ■ MAIN PCB 1) For Models : LDPH7972*, LDPM6762*, LDPS6762*, LDTH7972*, SDWB24*3 - 162 -...
  • Page 163 For Authorized Service Technicians 2) For Models : LDPH5554*, LDTH5554*, LDPH6762* - 163 -...
  • Page 164 For Authorized Service Technicians Display PCB ■ DISPLAY PCB - 164 -...
  • Page 165 For Authorized Service Technicians MCU PCB ■ MCU PCB - 165 -...
  • Page 166 • DISCLAIMER - This Guide is strictly confidential name : D-PC1) and shall not be copied, disclosed, distributed, disseminated, publicized or reproduced, in • Inlet hose installation kit is available on LG.com, whole or in part, without the prior written part number AEM75698902. authorization of LG Electronics.
  • Page 167 For Authorized Service Technicians en-us_main.book.book Page 11 Tuesday, March 12, 2024 11:11 AM INSTALLATION Preparing Dishwasher Sliding Dishwasher into Cabinet Opening Connecting Water Supply Line and Power Connecting the Drain Hose Leveling Dishwasher Securing Dishwasher in Cabinet Opening Final Installation Check Product Dimensions Back View 23 /...
  • Page 168 For Authorized Service Technicians en-us_main.book.book Page 12 Tuesday, March 12, 2024 11:11 AM 12 INSTALLATION Choosing the Proper Location dishwasher. Water supply hose, drain hose and electric cable should be passed through this area. Select a location as close to the sink as 26 / - 26 / "...
  • Page 169 The old hose the electrical cable. could leak or burst causing flooding and property damage. Contact an LG Customer Information Center for assistance in buying a new hose. • Electrical Connection - Use a time-delay fuse or circuit breaker.
  • Page 170 For Authorized Service Technicians en-us_main.book.book Page 14 Tuesday, March 12, 2024 11:11 AM 14 INSTALLATION Removing Lower Cover electrical conduit pipe is longer than 3" (76 mm) and is centered on the back wall. CAUTION • If you lay the dishwasher on its back, do so carefully to avoid damaging the drain hose and the tub.
  • Page 171 For Authorized Service Technicians en-us_main.book.book Page 15 Tuesday, March 12, 2024 11:11 AM INSTALLATION • Do not push the door of the dishwasher with NOTE knees when sliding the dishwasher into position. Doing so can damage the front cover. • Installation brackets and screws can be found in the silverware basket.
  • Page 172 For Authorized Service Technicians en-us_main.book.book Page 16 Tuesday, March 12, 2024 11:11 AM 16 INSTALLATION pulling the drain hose farther into the Smooth out or pad the edges of the hole cabinet. drilled for the water supply to avoid damaging the drain hose.
  • Page 173 For Authorized Service Technicians en-us_main.book.book Page 17 Tuesday, March 12, 2024 11:11 AM INSTALLATION Use a Phillips screwdriver to remove 2 screws Slide the water supply line back through the channel, pulling gently from inside the cabinet to make sure the line is not kinked, pinched, stressed or crushed.
  • Page 174 For Authorized Service Technicians en-us_main.book.book Page 18 Tuesday, March 12, 2024 11:11 AM 18 INSTALLATION Fold the connected wires back into the junction box and screw on the junction box cover. WARNING • Verify that the black wire is hot (120 V). If not, or if you are unsure of the power supply, have it checked by a licensed electrician.
  • Page 175 For Authorized Service Technicians en-us_main.book.book Page 19 Tuesday, March 12, 2024 11:11 AM INSTALLATION Height of the Drain Hose The height of the drain hose end must be at least 12" (305 mm) and within 40" (1016 mm) from the base of the dishwasher to avoid water being siphoned from the tub.
  • Page 176 For Authorized Service Technicians en-us_main.book.book Page 20 Tuesday, March 12, 2024 11:11 AM 20 INSTALLATION With the lower rack removed, place a level on the Connect the end of the drain hose to the air inside wall of the tub to check that the dishwasher with the hose clamp provided.
  • Page 177 For Authorized Service Technicians en-us_main.book.book Page 21 Tuesday, March 12, 2024 11:11 AM INSTALLATION drive wrench with 1/2" socket to turn the NOTE front leveling feet and adjust the front of the tub. • Installation brackets and screws can be found in the silverware basket.
  • Page 178 For Authorized Service Technicians en-us_main.book.book Page 22 Tuesday, March 12, 2024 11:11 AM 22 INSTALLATION Sound Insulation Sheet If a water leak is detected, press and hold the If your model shipped with a sound insulation START button for 3 seconds to cancel the sheet, follow the instructions provided to install wash cycle and automatically drain the water the sheet now.
  • Page 179 For Authorized Service Technicians en-us_main.book.book Page 23 Tuesday, March 12, 2024 11:11 AM INSTALLATION Error Code Possible Cause and Solution Water supply line is kinked under dishwasher. • Feed the drain and water supply hoses through the hole under the sink. Then gradually slide the dishwasher into the cabinet while pulling on the hoses under the sink to take up...
  • Page 180 For Authorized Service Technicians F240 E010 F101 F039 A131 F001 F010 A130 A030 A040 E005...
  • Page 181 For Authorized Service Technicians E010 F101 F039 A131 F001 A130 A040 E005...
  • Page 182 For Authorized Service Technicians E010 F101 F039 A131 F001 A130 A030 A040 E005...
  • Page 183 For Authorized Service Technicians ACCESSORIES F240 F102 E010 F101 F039 A131 F001 F010 A130 A031 A030 A040 E005...
  • Page 184 For Authorized Service Technicians E010 F101 A131 F001 A130 A030 A040 E005...
  • Page 185 For Authorized Service Technicians F022 F060 F041 F171 F117 F050 F216 F040 F173 F106 F132 F144 F107 F143 F217...
  • Page 186 For Authorized Service Technicians F022 F060 F041 F171 F117 F050 F216 F040 F173 F106 F132 F144 F107 F143 F217...
  • Page 187 For Authorized Service Technicians M090 F013 F011 A160 F014 M260 K253 M210 M100 M266 F013 M105 K251 M250 F011 M270 M266 M266 F015...
  • Page 188 For Authorized Service Technicians M090 F013 F011 A160 F014 M260 K253 M210 M100 M266 F013 M105 K251 M250 F011 M266 M266 F015...
  • Page 189 For Authorized Service Technicians M090 F013 F011 F014 M260 K253 M210 M100 M266 F013 M105 K251 M250 M270 F011 M266 M266 F015...
  • Page 190 For Authorized Service Technicians M280 F038...
  • Page 191 For Authorized Service Technicians A150 A159 A165 A080 A156 A157 A165 A154 A146 A151 A159 A101 A155 A153 A070 A060 A055...
  • Page 192 For Authorized Service Technicians A150 A159 A165 A157 A146 A156 A154 A151 A155 A153 A060 A101 A070 A055...
  • Page 193 For Authorized Service Technicians A150 A159 A165 A159 A080 A165 A156 A157 A146 A154 A151 A155 A101 A153 A070 A060 A055...
  • Page 194 For Authorized Service Technicians F192 F191 F193 A050...
  • Page 195 For Authorized Service Technicians F192 F191 F193 A050...
  • Page 196 For Authorized Service Technicians A140 A181 A182 A186 A185 A183 A184 A188 A187 A141 A143 A148 A142 A143 A143 A142 A145 A143 A172 A143 A110...
  • Page 197 For Authorized Service Technicians A140 A181 A182 A186 A185 A189 A190 A183 A184 A188 A187 A141 A191 A142 A148 A192 A142 A142 A142 A146 A142 A142 A172 A145 A147 A142 A110...
  • Page 198 For Authorized Service Technicians A140 A179 A181 A146 A180 A141 A182 A147 A142 A110...
  • Page 199 For Authorized Service Technicians A170...
  • Page 200 For Authorized Service Technicians A170...
  • Page 201 For Authorized Service Technicians A170...
  • Page 202 For Authorized Service Technicians K200...
  • Page 203 For Authorized Service Technicians K200 K230 K240 K232 K210 K250...
  • Page 204 For Authorized Service Technicians K030 K217...
  • Page 205 For Authorized Service Technicians K030 K031 K217 K231 K005...
  • Page 206 For Authorized Service Technicians K030 K031 K217 K231 K005...
  • Page 207 For Authorized Service Technicians K116 K117 K100 K113 K114 K122 K121 K001 K110 K003 K004 K101 K124 F142 F141 K112 F175 K111 F174...
  • Page 208 For Authorized Service Technicians K115 K117 K100 K113 K114 K001 K122 K121 K003 K110 K004 K101 F142 K124 F175 K112 F141 K111 F174...
  • Page 209 For Authorized Service Technicians M120 A120 M070 F100 M007 M139 F104 M071 M087 M126 M136 A131 M136 M138 M030 A131 M025 M027 M137 M028 M050 M140 M026 M133...
  • Page 210 For Authorized Service Technicians M120 A120 M070 M007 M139 M071 M087 M126 M136 A131 M136 M138 M030 A131 M025 M027 M137 M028 M050 M026 M133...
  • Page 211 P/No. : MFL37554846...

This manual is also suitable for:

Ldth7972 seriesSdwb24 3 seriesLdpm6762 seriesLdps6762 seriesLdph5554 seriesLdph6762 series ... Show all