LG LDF5545ST Service Manual
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LG LDF5545ST Service Manual

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DISHWASHER
SERVICE MANUAL
NOTE
BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY
FOR SAFETY AND CORRECT SERVICES.
For Authorized Service Technician
MODEL : LDF5545ST

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Summary of Contents for LG LDF5545ST

  • Page 1 DISHWASHER SERVICE MANUAL NOTE BEFORE SERVICING THE UNIT, PLEASE READ THIS MANUAL CAREFULLY FOR SAFETY AND CORRECT SERVICES. For Authorized Service Technician MODEL : LDF5545ST...

  • Page 3: Table Of Contents

    For Authorized Service Technician CONTENTS 1. CAUTION .................................... 4 2. SPECIFICATIONS ................................5 3. FEATURES & TECHNICAL EXPLANATION ...................... 6 4. PARTS NAME .................................. 13 5. PROGRAM CHART ............................... 14 6. HOW TO DISASSEMBLE ............................18 7. TROUBLE SHOOTING METHODS ......................... 28 7-1.

  • Page 4: Caution

    For Authorized Service Technician 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 Technician 2. SPECIFICATION ITEM SPECIFICATION Rated Voltage / Frequency AC 120V/60Hz Installation Built-In Place Settings Product Dimension(in) "*24 ⅝"*33 ⅝" Product Weight(lbs) 72~82lbs Door Color White, Black, Stanless Tub Material Stainless Steel Control Electronics Rated Power(Watt) 1,350 Heater Power(Watt) 1,200 Programs...

  • Page 6: Features & Technical Explanation

    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 Technician LDF5545ST Control Panel For Non-Steam Models Control Lock Power Press the Power button to turn power on and The Control Lock feature helps prevent settings from being changed during a cycle. Selecting this feature dishwasher powers off.
  • Page 8 For Authorized Service Technician For Steam Models Control Lock Power Press the Power button to turn power on and The Control Lock feature helps prevent settings from being changed during a cycle. Selecting this feature dishwasher powers off. Power on the control panel. This feature does not lock the turns off for purposes of safety and economy.
  • Page 9 For Authorized Service Technician Cycles Download Cycle Use a dedicated cycle downloadable via Wi-Fi or Select your desired cycle. NFC. Auto Machine Clean This cycle is for cleaning the inside of the dishwasher. soil toughness and is optimized to achieve the best Use the cycle without dishes in the machine.
  • Page 10 For Authorized Service Technician Options High Temp Raises the main wash temperature to improve Select the desired cycle button and then select the cleaning. options for that cycle. Extra Dry Dual Zone Select the Extra Dry option for better drying This option automatically sets the spray intensity to performance.
  • Page 11 For Authorized Service Technician LDF5545ST 3-3. TEST MODE CHECK PROGRAM The number Load and Checking points Door open/ BUTTON Top Display Remark pushing closed Load LED lighting button "nC" will be n35/U00/ POWER All LEDs are displayed when NFC 1 TIME...

  • Page 12: Parts Name

    For Authorized Service Technician 4. PARTS NAME Exterior Parts Control Panel & Door Handle Control Panel Front Cover Door Handle Lower Cover Front Cover Shipping Brace Lower Cover Safety Cover Shipping Brace Signal Light (some models) Safety Cover Base Signal Light (some models) Leveling Feet Base Leveling Feet...

  • Page 13: Program Chart

    For Authorized Service Technician 5. PROGRAM CHART LDF5545ST (SCHEMATIC DIAGRAM) - 13 -...
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  • Page 18: How To Disassemble

    For Authorized Service Technician 6. HOW TO DISASSEMBLE 1. Lower Cover 1) Remove the front 2 screws. - 18 -...
  • Page 19 For Authorized Service Technician LDF5545ST 2-1. Front Cover Assembly 1) Front Cover ① Open the door. ② Remove the 6 screws. 2-2. Control Panel Assembly 1) Control Panel Assembly ① Remove the 6 screws. ② Remove the wire connections. ③ Remove the Handle.
  • Page 20 For Authorized Service Technician LDF5545ST 2-3. Door Liner Assembly 1) Blower Assembly Dispenser Fan Motor ① Remove the screw. ② Remove the vent from Fan motor. ③ Disconnect the connector. ④ Open the Door. ⑤ Remove the Blower cover - Insert flat head screwdriver in hole (A ).
  • Page 21 For Authorized Service Technician 1) Assemble New Dispenser ① Verify the status of the flanges on the inner door. ② Place the support jig then insert the new dispenser. ③ Make sure that all flanges fit properly into the dispenser hooks. ※...
  • Page 22 For Authorized Service Technician 3. Lower Frame ① Remove 2 screws. ② Press the holder hook as shown in Overflow Hose figure. ③ Remove the Harness Holder. ④ Remove the Overflow Hose from the Lower Frame. ※ Be careful the Overflow Hose should not Harness be lost and damage.
  • Page 23 For Authorized Service Technician 4. Tub Assembly 1) Rack ① Remove all Racks. 2) Nozzle Guide & 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...
  • Page 24 For Authorized Service Technician 3-1) Air Guide Assembly Air Guide Air Guide ① Turn the Air Guide Nut counterclockwise. ※ Be careful the rubber packing of Air Guide Assembly should not be lost. ② Disconnect the connector. ③ Remove the Clamp on the Inlet Hose. ④...
  • Page 25 For Authorized Service Technician 6) Main PCB ① Press the hook and remove the PCB. ② Remove the screw and take the PCB Cover off. ③ Disconnect the connector. ※ Be careful Please Pull the Main PCB Slowly and carefully PCB Cover Main PCB 7) Pump Case Assembly...
  • Page 26 For Authorized Service Technician 8) Hinge Supporter & Rail Assembly ① Remove the Hinge Supporter screw. ② Remove the Hinge supporter from Base hook. ③ Rotate the screwdriver, after slide it into the gap between Stopper Roller and Rail Roller. Rotate the screwdrive.
  • Page 27 For Authorized Service Technician 5. Sump Assembly 1) Vario Motor & Vario Cam ① Remove 2 screws for Vario Motor Vario ② Pull the Vario Motor/Cam and Micro Motor switch. Vario Micro 2) Soil Sensor Switch ① Remove the wire connections. Soil ②...

  • Page 28: Trouble Shooting Methods

    For Authorized Service Technician 7. TROUBLE SHOOTING METHODS 7-1. TROUBLE SHOOTING 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. 2) Wiring connection is OK? 2) Check and reconnect the wire.
  • Page 29 For Authorized Service Technician EXCESS ERROR 1) The Inlet Valve is troubled. 1) Replace the Inlet Valve. 2) The Controller is troubled. 2) Replace the Controller. 3) After Replace the PCB, still same 3) Replace the Hole Sensor. Error cord is displaying. displayed Condition Excessive water...

  • Page 30: Trouble Shooting Methods

    For Authorized Service Technician 7-2. TROUBLE SHOOTING METHODS - 30 -...
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  • Page 38 For Authorized Service Technician No Power Is the supplied voltage Check the Reconnect the 120V AC(+10%, -15%) fuse or reset connector or repair Is the connector connected to Main PCB the circuit the harness Assembly disconnected or disassembled? breaker. Replace the Alternate Is Chip LED on while the power is on? main PCB...
  • Page 39 For Authorized Service Technician Washing result is not satisfactory. After washing, is there Using a wash booster will help any white deposits remove spots, residue and hard on the dishes or inner tub? water (white) film. After washing, is there Reduce the amount of Rinse aid.
  • Page 40 For Authorized Service Technician Drying result is not satisfactory. After washing, is there Reduce the amount of Rinse aid. any streaks on the dishes or inner tub? After washing, is there Increase the amount of Rinse aid. water drops on the dishes or inner tub? Is the drying result of a) Does the upper nozzle fit properly...

  • Page 41: Trouble Diagnoses And Repair By Symptom

    For Authorized Service Technician 7-3. TROUBLE DIAGNOSES AND REPAIR BY SYMPTOM No Power on when the power button pressed. • Re-connect the Powr connection. The Power connection is correctly connected. • Check the electricity is failed or not. The Fuse or Circuit Breaker •...
  • Page 42 For Authorized Service Technician The Wash Pump/Motor does not run. • close the Door tightly. The Door is tightly closed? • Check the Door Switch in Latch Handle. • Re-connect the wiring connections related to the The Wiring connections is OK? Washing Motor.
  • Page 43 For Authorized Service Technician 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.) - 28 - - 28 - - 43 -...

  • Page 44: Installation Instruction

    For Authorized Service Technician 8. INSTALLATION INSTRUCTION Preparing Cabinet Opening WARNING Don't use existing holes unless they are in the dishwasher opening. An opening may be needed on both sides to route plumbing and electrical drain hose may be damaged by being crushed connections.
  • Page 45 For Authorized Service Technician Preparing Electrical Wiring Preparing Water Supply Connection Operate this appliance with the correct voltage as shown in this manual and on the rating plate. Make sure the house water supply is turned off before connecting the dishwasher water lines. branch circuit which is protected by a time delay Connect the dishwasher to a hot water supply including a ground wire.
  • Page 46 For Authorized Service Technician Preparing Dishwasher Removing Lower Cover Remove the two screws attaching the lower Removing Rear Plastic Shipping cover to the dishwasher. Brace Remove the lower cover from the base. Remove the insulation pad from behind the access panel. NOTE Do not pull or lift the dishwasher using the handle;...
  • Page 47 For Authorized Service Technician Sliding Dishwasher into Attaching Mounting Hardware Cabinet For countertops made of wood or other material installation brackets. Slide the dishwasher carefully into the cabinet opening. Insert the installation brackets into the slots in the upper frame. Make sure the drain hose inside the cabinet is not kinked or pinched.
  • Page 48 For Authorized Service Technician Leveling the Appliance Check that dishwasher is level. Attach level on top front opening of tub from side to front legs and adjust the front of the tub. side. Turn the front legs clockwise to raise the front of the Attach level on front side of tub.
  • Page 49 For Authorized Service Technician Securing Dishwasher to Connecting Drain Hose Countertop For countertops made of wood or other material that 40" Method 2. (1016 mm) max. 12" (305 mm) NOTE min. from falling down into the pump. Use a magnetic screwdriver. Method 1 (not supplied).
  • Page 50 For Authorized Service Technician Connecting to Disposal or Waste Tee NOTE with Air Gap dishwasher will not be able to drain properly. Remove the knockout plug with a hammer and screwdriver. Connecting to Disposal with No Air Connect end of the drain hose to the air gap with hose clamp provided.
  • Page 51 For Authorized Service Technician Connecting Water Supply Connecting Power copper tube into the elbow. Tighten the compression nut and make sure that the line is not kinked or pinched. NOTE The best location for the electrical conduit is on the right side of the back wall.
  • Page 52 For Authorized Service Technician Final Check Error Code Possible Cause and Solution Drain hose kinked or pinched. Turn on electrical power. Feed the drainage and supply Turn on house water supply. hoses through the hole under the sink. Then gradually slide the Make sure the door opens and closes smoothly.

  • Page 53: Exploded View

    For Authorized Service Technician 9. EXPLODED VIEW ■ Exploded View E010 F101 A130 F001 A040 M050 E005 - 53 -...
  • Page 54 For Authorized Service Technician LDF5545ST ■ Tub Assembly F040 F022 F050 F060 F041 F171 F132 F117 F105 F144 F143 F117 F215 - 54 -...
  • Page 55 For Authorized Service Technician LDF5545ST ■ Base Assembly F013 M090 F011 M260 F014 A160 M210 M100 M250 K251 F013 M105 M266 M266 F011 F015 M266 - 55 -...
  • Page 56 For Authorized Service Technician LDF5545ST ■ Upper Rack Assembly A150 A159 A146 A165 A157 A156 A154 A151 A155 A153 A101 A070 A060 A055 - 56 -...
  • Page 57 For Authorized Service Technician LDF5545ST ■ Water Guide Assembly F191 F192 F193 A050 - 57 -...
  • Page 58 LDF5545ST ■ Lower Rack Assembly A140 A146 A141 A110 A142 A147 - 58 -...
  • Page 59 For Authorized Service Technician For Authorized Service Technician LDF5545ST ■ Panel Assembly K200 K210 K262 K230 K220 - 59 -...
  • Page 60 For Authorized Service Technician For Authorized Service Technician LDF5545ST ■ Front Cover Assembly K030 K221 K217 K220 - 60 - - 60 -...
  • Page 61 For Authorized Service Technician LDF5545ST ■ Door Liner Assembly K001 K121 K100 K113 K122 K114 K110 K124 K101 K112 F142 F141 K111 F175 F174 - 61 -...
  • Page 62 For Authorized Service Technician ■ Sump Assembly M070 A120 M120 M071 M087 M007 M126 M139 M136 M139 M133 M136 M027 M025 M028 M026 M030 M137 - 62 -...

  • Page 63: Wiring Diagram

    For Authorized Service Technician 10. WIRING DIAGRAM LDF5545ST 10-1. WIRING DIAGRAM - 63 -...

  • Page 64: Main Pcb

    For Authorized Service Technician 10-2. MAIN PCB - 64 -...

  • Page 65: Display Pcb

    For Authorized Service Technician 10-3. DISPLAY PCB - 65 -...
  • Page 66 For Authorized Service Technician P/No. : MFL37554814 - 66 -...

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