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LG XD3 25U 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 : XD3*25U** / XD4*24U**
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 ⓒ 2017 LG Electronics Inc. All rights
reserved. Only for training and service purposes.
CONFIDENTIAL

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Summary of Contents for LG XD3 25U 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 3: Table Of Contents

    For Authorized Service Technicians CONTENTS 1. impoRtant safety notice ........................... 4 2. specifications ................................5 3. featuRes and opeRation ............................ 6 4. paRts ....................................15 5. pRogRam guide ................................. 16 6. how to disassemble ............................17 7. tRoubleshooting methods .......................... 31 7-1.

  • Page 4: Important Safety Notice

    For Authorized Service Technicians 1. IMPORTANT SAFTY 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 5: Specifications

    For Authorized Service Technicians 2. SPECIFICATIONS ITEM SPECIFICATION Rated voltage / frequency ac 220~240v / 50hz installation built under place settings xd3*25u** (15 p/s) xd4*24u** (14 p/s) product dimension (mm) 600(w) x 567(d) x 815(h) xd3*25u** : 44kg product weight (kg) xd4*24u** : 42kg noble steel, platinum silver iii, door color...

  • Page 6: Features And Operation

    Smart ThinQ™ Download the new LG smart phone app to set options, self-diagnose and troubleshoot problems with the appliance, and other useful features. Some of these functions use Wi-Fi or NFC (Near Field Communication) technology and require an NFC-equipped smart phone.
  • Page 7 For Authorized Service Technicians Control Panel - 7 -...
  • Page 8 For Authorized Service Technicians Control Panel Control Panel Features Power • Press Power button to turn power on and off. • After the cycle is complete, the power automatically turns off for purposes of safety and economy. • If there is a power surge, power outage, or disruption of any kind, power is automatically turned off for safety.
  • Page 9 For Authorized Service Technicians • To activate or deactivate the button sounds, press and hold Dual Zone and Energy Saver simultaneously for 3 seconds. The error alert sound cannot be turned off. Cancel • The drain pump activates and the cycle cancels. Once the appliance finishes draining, the power turns off.
  • Page 10 For Authorized Service Technicians limescale, and other dirt. Add citric acid or another lower spray arm. Place heavily soiled dishes like cleaning agent for more effective results. plates and bowls in the lower rack and lightly soiled dishes like cups and small plates in the upper rack •...
  • Page 11 For Authorized Service Technicians Delay Start • To activate or deactivate this feature, press and hold the Energy Saver button and the High This feature delays the start of a selected cycle. Temp button simultaneously for 3 seconds. Each time the Delay Start button is pressed, the •...
  • Page 12 For Authorized Service Technicians White (middle) The white lamp flashes when you select an option cycle or when a cycle has been paused. • The white lamp lights up when a cycle is running. Green (right) The green lamp lights up when a cycle is finished. When the door is opened, the lamp turns off.
  • Page 13 For Authorized Service Technicians 3-3. TEST MODE CHECK PROGRAM Times Load and Checking points Door BUTTON button is open/ Remark Display Load LED lighting pushed closed "nC" will be POwER A**/ displayed when NFC +AUTO 1 Time d**/U** Either or wifi Module is +START (Version) Failure.
  • Page 14 For Authorized Service Technicians function button method of operation start extra dry poweR 2 button press for 3 seconds washing motor on / off staRt press increse washing motor Rpm delay start press decrease washing motor Rpm extra dry press motor nozzle setting high temp...

  • Page 15: Parts

    For Authorized Service Technicians 4. PARTS AND SPECIFICATIONS NOTE • Appearance and specifications may change without notice to improve the quality of the appliance. Front View Interior View Control Panel & Door Handle Top Wash Impeller Front Cover Upper Spray Arm Levelling Feet Lower Spray Arm Power Cord...

  • Page 16: Program Guide

    For Authorized Service Technicians 5. PROGRAMME TABLE Programme Guide (model dependent) Wash Rinse Programme Soil Level Heating Pre wash Main wash Rinse rinse Auto All levels (50 - 55 °C) (70 °C) Intensive Heavy (75 °C) (70 °C) Delicate Light (45 °C) (70 °C) Refresh...

  • Page 17: How To Disassemble

    For Authorized Service Technicians 6. 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) if necessary, remove the inlet hose and drain hose to avoid the hose damages.
  • Page 18 For Authorized Service Technicians 2-1. Front Cover ① Open the door. ② Remove 6 screws(Stainless) around front cover assembly. ③ C lose the door slowly and remove front cover downwards. 2-2. Control Panel Assembly ① Open the door. ② Remove 6 screws(stainless). ③...
  • Page 19 For Authorized Service Technicians 2-4. Door Liner Assembly dispenser assembly using dispenser service Jig ① close the door. ② disconnect electrical wire connectors from dispenser. ③ insert the two side pieces into the inside of the dispenser. ④ insert the bottom piece. ⑤...
  • Page 20 For Authorized Service Technicians 2-5. Door Spring Replacing door spring ① ② ① pull the Rope and spring. ② Remove the Rope from the Roller. ③ Remove the spring from the base. Roller spring rope ③ ④ 2-6. Door Liner Replacing door liner ①...
  • Page 21 For Authorized Service Technicians 3. Lower Frame ① Remove 1 screw for release lower front Overflow cover. Guide ② Remove 2 screw both sides. ③ P ress the holde hook to remove the Harness Holder. ④ Remove the Overflow Guide from the Lower Frame.
  • Page 22 For Authorized Service Technicians 4. Tub Assembly Removing Racks (3-Rack models) ① slide all racks forward to remove. ※ for this model only (xd3*25u**) - 22 -...
  • Page 23 For Authorized Service Technicians 2) Removing nozzle & water guide ① Remove the 2 screws on the lower nozzle. ② pull up the lower nozzle and remove. ③ Remove the screw on the water guide. ④ Remove the water guide from the tub bracket (top).
  • Page 24 For Authorized Service Technicians 4) Removing main pcb ① press the 2 hook and remove the main pcb by lifting. ② Remove the screw and take the pcb cover off. ③ disconnect the connector. ※ use care and move slowly when pulling pcb cover out the main pcb.
  • Page 25 For Authorized Service Technicians 6) Removing tub ① Remove softener cap and filter. ② Remove the 7 screws on the sump cover. ③ Remove the 2 screw the back of base. ④ Remove the Roller on the sides. ⑤ Remove the hinge supporter from base hook. ⑥...
  • Page 26 For Authorized Service Technicians 5. Sump Assembly 1) Removing drain motor. ① disconnect the connector. ② turn the drain motor clockwise and o-ring remove. ※ take care not to lose the gasket. ※ during turning, don't push housing. 2) Removing thermistor ①...
  • Page 27 For Authorized Service Technicians 4) Removing vario motor & cam ① Remove 2 screws for vario motor vario ② pull the vario motor/cam and micro motor switch. vario micro 5) Removing soil sensor switch ① Remove the wire connections. soil ②...
  • Page 28 For Authorized Service Technicians <Steam Model> 1. Sump Assembly 1) Removing Steam ball valve ① Remove 2 screws. ② Remove the Clamp. ③ Pull the Steam ball valve. 2) Removing Steam Nozzle Hose ① Remove the Front Cover. ② Remove the Duct. ③...
  • Page 29 For Authorized Service Technicians <Steam Model> 2. Door Liner Assembly 1) Steam nozzle ① Remove the 4 Screws. ② Pull the Steam nozzle and Bracket. - 29 -...
  • Page 30 For Authorized Service Technicians <Steam Model> 2) ) Removing Nozzle & Water Guides 3. Water guide Assembly ① Nozzle. ② Pull up the Lower Nozzle and remove. ③ Remove the screw and clip on the Water Guide 3-1 Remove the Lower Connector Clamp.

  • Page 31: Troubleshooting Methods

    For Authorized Service Technicians 7. TROBLESHOOTING METHODS 7-1. tRoubleshooting accoRding to displayed eRRoR message possible cause eRRoR message Remedy foR eRRoR occuRRence 1) the water supply tap is closed. 1) open the water supply tap. INLET ERROR 2) wiring connection is ok? 2) check and reconnect the wire.
  • Page 32 For Authorized Service Technicians 1) the inlet valve is damaged. 1) Replace the inlet valve. EXCESS ERROR 2) the controller is damaged. 2) Replace the controller. 3) after Replace the pcb, still same 3) Replace the hole sensor. error code is displaying. displayed Condition water fills above normal...

  • Page 33: Troubleshooting Methods (Error Code)

    For Authorized Service Technicians 7-2. TROUBLESHOOTING METHODS (Error Code) How to Check Water supply (LQC Mode) A. IE - Press ‘Power + Auto + Start’ - Press ‘Start’ 4 times. (Check supplying sound) - Press ‘Power’ (Turn off the dishwasher) - 33 -...
  • Page 34 For Authorized Service Technicians How to Check Drain Motor. (LQC Mode) B. OE - Press ‘Power + Auto + Start’ - Press ‘Start’ 3 times. (Check supplying sound) - Press ‘Power’ (Turn off the dishwasher) - 34 -...
  • Page 35 For Authorized Service Technicians C. AE - 35 -...
  • Page 36 For Authorized Service Technicians D. FE - 36 -...
  • Page 37 For Authorized Service Technicians E. tE - 37 -...
  • Page 38 For Authorized Service Technicians F. HE - 38 -...
  • Page 39 For Authorized Service Technicians G. LE - 39 -...
  • Page 40 For Authorized Service Technicians H. nE - 40 -...

  • Page 41: Troubleshooting Method (Etc.)

    For Authorized Service Technicians A. No power Is the supplied Voltage 230V AC? (-15%,+15%) Check the Fuse Check the circuit breaker Voltage Instability Is the current rating Alternate with explanation of multi-outlet power Use 1 socket only (For dishwasher) strip enough? (Avoid connecting Several electric devices) Is the connector connected...
  • Page 42 For Authorized Service Technicians Is LED of main PCB on while the power Is on? Is the connector connected to PCB/Noise filter disconnected or disassembled? - 42 -...
  • Page 43 For Authorized Service Technicians B. Not Working (Power is on but Not working) The door is tightly Closed? Close the door tightly Check the latch assembly in tub. Control lack is activated? (Displayed ‘CL’) Cancel of the control lock function by press the ‘Half load’ and ‘Energy Saver’.
  • Page 44 For Authorized Service Technicians C. Poor wash After washing, are there white Check the hard water condition deposits on the dishes or Softener assembly Inner tub? Use the rinse aid (Adjust the rinse revel) - Hard water Use the wash booster - Cloudy glasses - White scale 1.
  • Page 45 For Authorized Service Technicians * How to remove the white film from dishes or tub This can be cleaned easily with white vinegar (or citric acid). - Place about 1 cup (200ml ~ 300ml) of white vinegar into the Upper rack (Don’t pour the vinegar to the bottom area) - Load your dishwasher up with the dishes that have a white film on them.
  • Page 46 For Authorized Service Technicians 4. Check the vario of upper spray arm (Upper nozzle) Debris of glass is stuck on upper spray arm Can’t change the direction rotate 5. Arrange the dishes on the rack Debris of glass is stuck on upper spray arm Can’t change the direction rotate Use the dishes for Discolored Dish...
  • Page 47 For Authorized Service Technicians Drying result is not satisfactory. After washing, are there Reduce the amount of Rinse aid. any streaks on the dishes or inner tub? After washing, are there Increase the amount of Rinse aid. water drops on the dishes or inner tub? Is the drying result of cups &...
  • Page 48 For Authorized Service Technicians The Wash Pump/Motor does not run. • close the Door tightly. The Door is tightly closed? • Check the Door Switch On the tub. • Re-connect the wiring connections related to the The Wiring connections Washing Motor. are OK? •...
  • Page 49 For Authorized Service Technicians Power Button not automatically off after operation. Make sure the button is not blocked by foreign materials. Check the Power Switch.(Replace it, if necessary.) Check the Controller.(Replace it, if necessary.) - 28 - - 28 - - 49 -...

  • Page 50: Installation Instructions

    For Authorized Service Technicians 8. INSTALLATION INSTRUCTIONS Preparing Cabinet Opening NOTE Choosing the Proper Location • This installation must be conducted by qualified service personnel to ensure it has been installed correctly. • Do not pull or lift the appliance using the handle; dosing so can damage the door and hinges.
  • Page 51 For Authorized Service Technicians Levelling the Appliance Clean and dry the underside of the counter top on which the tape will be attached. Checking the Level Levelling the appliance prevents unnecessary leakage and poor washing. Check whether the appliance is perfectly level after installation. •...
  • Page 52 For Authorized Service Technicians Adjusting Back Levelling Feet Check the opening of door and repeat if necessary until the door opens and closes • Use a phillips screwdriver to adjust the rear properly. levelling foot and the rear of the tub using the centre screw at the base of the appliance in the front.
  • Page 53 For Authorized Service Technicians Attaching a Custom Kick Plate NOTE Adjust the position of the installation brackets • Please ensure that the height levelling of the by bending the metal tab. dishwasher is done by adjusting the feet before installing the side cabinet securing screws. Attaching the Lower Cover Adjust the position of the installation brackets by bending the metal tab.
  • Page 54 For Authorized Service Technicians Installing the Drain Hose Case 3 The custom Kick Plate is connected, and the dishwasher is in the middle of the kitchen If the end of the drain hose does not fit to the drain cabinet. (Using the brackets is not required.) line, use a drain extension kit (optional) that is resistant to heat and detergent.
  • Page 55 For Authorized Service Technicians Preparing Water and Method 1 Electrical Connections When the drain hose is connected to a waste spigot, the hose must be looped up to the underside of the bench top and secured. Connecting the Hose to the Water Tap Connect the water supply hose to the water tap.
  • Page 56 For Authorized Service Technicians Final Installation Check • Use sealant tape or sealing compound on the tap’s thread to avoid water leaks. Testing the Dishwasher • Make sure that the line is not kinked or sharply bent. Turn on electrical power. NOTE Turn on house water supply.

  • Page 57: Exploded View

    A001 A020 A010 A131 A130 M050 E006...
  • Page 58 E050 F101 A131 A130 F001 A276 F002 M050 A040...
  • Page 59 F022 F040 F060 F070 F050 F037 F171 F176 F172 F173 F117 A131 A130 F106 F132 F144 F035 F117 F143 F216...
  • Page 60 F022 F040 F060 F070 F050 F037 F171 F173 F105 A130 F117 F132 F144 F035 F117 F143 F215...
  • Page 61 M090 A160 F011 F013 M230 M260 F014 M266 K251 M100 F035 F015 F034 F037 F031 M133 F036...
  • Page 62 A157 A159 A150 A146 A080 A165 A166 A156 A157 A167 A154 A155 A101 A153 A070 A060 A055...
  • Page 63 F191 F194 A050...
  • Page 64 A189 A190 A181 A182 A140 A184 A146 A191 A192 A183 A148 A185 A186 A188 A187 A145 A172 A147 A142...
  • Page 65 A189 A190 A181 A182 A140 A184 A146 A191 A192 A183 A148 A185 A186 A188 A187 A145 A172 A147 A142 A110...
  • Page 66 A170...
  • Page 67 K200 K262...
  • Page 68 K030...
  • Page 69 K113 K116 K001 K114 K117 K100 K101 F142 K112 F175 F141 K111 F174...
  • Page 70 M070 A120 M120 M071 F100 M007 F104 M041 M087 M126 M139 M136 M138 M136 M133 M025 M027 M030 M137 M028 M026...

  • Page 71: Wiring Diagrams

    XD3*25U**, XD4*24U** - 71 -...

  • Page 72: Main Pcb

    For Authorized Service Technicians 10-2. MAIN PCB - 72 -...

  • Page 73: Display Pcb

    10-3. DISPLAY PCB - 73 -...

  • Page 74: Tips For Checking & Replacement

    For Authorized Service Technicians 11. Tips for Checking and Replacement POWER + AUTO + START - 74 -...

  • Page 75: Tip For Noise Filter Replacement

    For Authorized Service Technicians When reassembling the Noise filter, be careful that the Harness is secured to the Noise filter side hook before being Hook assembled. Harness - 75 -...
  • Page 76 For Authorized Service Technicians - 76 -...

  • Page 77: Tip For Dispenser Replacement

    For Authorized Service Technicians 1. Remove defective dispenser 1) Disconnect the electrical wire Disconnect Disconnect electrical wire Release the hook of solenoid connector then pull down on the connector connectors from dispenser Be careful not to damage the wires. 2) Insert the 3 pieces jig into the doorliner Separate jig into 3 pieces by cutting tabs.
  • Page 78 For Authorized Service Technicians 2. Assemble the new dispenser. 1) Prepare the new dispenser and support jig [New dispenser upport jig] 2) Check the flanges of doorliner Verify the status of the flanges on the inner door. • Ensure the flanges and doorliner are in good condition to minimize the risk of leaks once the new dispenser is installed 3) Assemble the dispenser Place the support jig and insert...

  • Page 79: Etc

    For Authorized Service Technicians 12. Etc. [Funnel All models 1. Funnel For effective washing performance, adjust the setting corresponding to the hardness level of water used in water supply. The water softener has 5 adjustment levels. You can insert salt to regenerating salt container by funnel. Once you have filled with appliance salt you must run the Rinse cycle immediately to remove the salt and the salt water around the inner tub in order to prevent corrosion Funnel...

  • Page 80: Explanation For Softener Asm

    For Authorized Service Technicians For effective washing performance, adjust the setting corresponding to the hardness level of water used in water supply. The water softener has 5 adjustment levels, and the appliance is programmed at the factory for a water hardness level of H0. You can check the default setting value and adjust it in the following steps 1.
  • Page 81 For Authorized Service Technicians 3. Setting the water softening system 1. Press ‘Power’ and ‘Half Load’ button simultaneously. Current setting value indicated. 2. Press the ‘Delay Start’ button, and then set up the intended value. Scope of setting value is H0 to H4. 3.

  • Page 82: Explanation For Vario System

    For Authorized Service Technicians The vario system can separate spray nozzle position. (Top impeller / Upper spray arm / Lower spray arm / Top & Lower spray arm / All) Also, Vario system help to efficiency washing performance by adjust spray arm position. 1.
  • Page 83 P/No. : MFL37554843...

This manual is also suitable for:

Xd4 24u seriesXd3a25umb

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