LG WM2240CW Washing Machine Service Manual

Contents

1. Specifications
2. Features and Technical Explanation
3. Parts Identification
4. Installation and Test
5. Operation
6. Wiring Diagram/Program Chart
7. Troubleshooting
8. Diagnosis and Troubleshooting
9. Disassembly Instructions
10. Exploded View

1. Specifications

TO reduce the risk of personal injury, adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses. Failure to follow all of the safety warnings in this manual could result in property damage, personal injury or death.

2. Features & Technical Explanation

2-1. Features

• Direct Drive System: The advanced Brushless DC motor directly drives the drum without belt and pulley.

  [Diagram: Motor directly connected to drum, no belts/pulleys]

• Tilted Drum and Large Door Opening: Tilted drum and large opening make it possible to load and unload clothing more easily.

  [Diagram: Washer drum tilted forward with a large circular door opening]

• Time-Released Dispenser: Detergent, fabric softener and bleach are dispensed separately at the right time during wash cycle.

  [Diagram: Dispenser drawer with compartments for detergent, softener, and bleach]

• Automatic Wash Load Detection: Automatically detects the load and optimizes the washing time.

  [Diagram: Washer with sensors indicating load size and water level]

• Child Lock: The Child lock prevents children from pressing any button to change the settings during operation.

  [Diagram: Cartoon of a child being prevented from touching washer controls]

2-2. Neuro Fuzzy Washing Time Optimization

To get the best washing performance, optimal time is determined by the water temperature, the selected washing temperature, and the size of the load.

[Diagram: Flowchart showing inputs (water temperature, selected washing temperature, load size) feeding into a "NEURO-FUZZY" process, which outputs washing time, rinsing time, and spin rhythm/time to achieve "the best washing performance". Stages: SENSING, PROCESSING, DETERMINATION, EFFECT.]

2-3. Water Level Control

This model incorporates a pressure sensor which can sense the water level in the tub. The water supply is stopped when the water level reaches the preset level, the washing program then proceeds. Spinning does not proceed until the water in the tub drains to a certain level.

2-4. Door Control

The door can be opened by pulling the door handle whenever the washer is not in operation. When the cycle is completed, the DOOR LOCKED light will turn off. If a power failure has occurred while in operation, the door will unlock after 5 minutes. Clicking sounds can be heard when the door is locked/unlocked.

2-5. The Door Can Not Be Opened

• While program is operating
• When a power failure and power plug is taken out in operation
• While Door Lock lights turn on.
• While the motor is in the process of inertial rotating, through the operation is paused.

2-6. Door Locked Lamp Lights

• When the frequency of water level is lower than 22.9 kHz (It can be canceled when the frequency is more than 23.8 kHz)
• When the temperature inside the tub is higher than 45°C and water level is not 25.5 kHz (It can be canceled when the water level is 25.5 kHz or the temperature inside the tub is lower than 40°C)

2-7. Child Lock

• Use this option to prevent unwanted use of the washer. Press and hold OPTION button for 3 seconds to lock/unlock control.
• When Child lock is set, the display blinks and all buttons are disabled except the Power button. You can lock the washer while it is operating.
• CHILD LOCK lasts after the end of cycle. If you want to deactivate this function, Press and hold the OPTION button for 3 seconds.

3. Parts Identification

Main Components:

• Drain Hose
• Dispenser
• Door
• Lower Cover Cap
• Adjustable Feet
• Drain Plug
• Drain Pump Filter
• Control Panel
• Drum

Back of Washer:

• Cold Water Inlet
• Air Vent for Safety
• Hot Water Inlet

[Diagram: Line drawing of the LG washing machine, showing front and back views with labels for main components and back connections.]

Accessories:

• Hot/Cold (1 each) Hose
• Hose retainer
• Wrench for removing shipping bolts and leveling the washer
• Tie strap to secure drain hose to standpipe, inlet hose, or laundry tub
• Cap (4 each) to cover the holes created after removing the shipping bolts

[Diagrams: Illustrations of the accessories listed.]

Power Plug: If the supply cord is damaged, it must be replaced by the manufacturer or an authorized service technician in order to avoid a hazard.

4. Installation & Test

Service Checkpoints:

1. Before servicing, ask the customer what the trouble is.
2. When installing or repairing the washer, check with the troubleshooting guide.
3. Check the setup (power supply is 120 V AC, remove the transit bolts, etc.).
4. Check with the troubleshooting guide.
5. Plan your service method by referring to the disassembly instructions.
6. Service the unit.
7. After servicing, operate the appliance to see whether it functions correctly.

Standard Installation

The appliance should be installed as follows:

How to Connect the Inlet Hose

• Check the rubber seals on both sides of the hose.
• Connect the water hoses to the faucets.
• Turn on the water tap to remove foreign substance such as dirt, sand, or sawdust in the water line, and then check the water temperature.
• Connect the hoses to the water inlets.

[Diagram: Water hoses connecting to hot and cold water faucets on the back of the washer.]

Connect the Drain Hose

• Make sure that the hose is not twisted. [Diagram: Hose with a cross mark indicating it should not be twisted.]
• Avoid submerging the end of the hose. [Diagram: Hose end submerged in water with a cross mark.]

※ The end of the drain hose should be placed less than 96" from the floor.

Connect Power Plug

• Connect the power plug to the wall outlet. [Diagram: Power plug being inserted into a wall outlet.]
• Avoid connecting several electric devices, as doing so may cause a fire. [Diagram: Multiple devices plugged into one outlet with a cross mark.]

Test Operation

1. Preparation for washing: Connect the power plug to the outlet. Connect the inlet hoses. [Diagram: Washer with hoses connected.]
2. Press the POWER button: [Diagram: Hand pressing the power button.]
3. Press the Start/Pause button: Listen for a click to determine if the door has locked. [Diagram: Hand pressing the start/pause button.]
4. Check the water supply: Check if water is supplied through the detergent dispenser. [Diagram: Water flowing into the detergent dispenser.]
5. Check the automatic reverse rotation: Check if the drum rotates clockwise and counterclockwise. [Diagram: Drum shown rotating clockwise and counterclockwise.]
6. Check the water temperature: Press the WASH/RINSE button and the present temperature will be displayed.
7. Check the drain and spin functions: Power off and then power on. Press the SPIN SPEED button. Press the START/PAUSE button. Check the spin and drain functions. [Diagram: Display showing wash/spin status.]
8. Press the START/PAUSE button: Listen for a click to determine if the door is unlocking.
9. Water removal: If SVC is needed during check, remove the remaining water by pulling out the hose cap. [Diagram: Hose cap being pulled to drain water.]

5. Operation

LG WM2240C* Control Panel

[Diagram: Detailed illustration of the LG washing machine control panel, showing the cycle selector dial, buttons (Power, Start/Pause, Wash Temp., Spin Speed, Soil Level, Signal, Option), digital display, and indicator lights.]

Key Controls and Features:

• POWER button: Use this button to turn power On/Off.
• CYCLE SELECTOR: Rotate the cycle selector knob to select the cycle designed for different types of fabric and soil level.
• START/PAUSE button: Use this button to start/stop the washer.
• WASH TEMP., SPIN SPEED, SOIL LEVEL, SIGNAL: Select a water temperature based on the type of load you are washing. To change the spin speed, press the Spin Speed button repeatedly to cycle through available options. To change the soil level, press the Soil Level button repeatedly until the desired setting is on. Press repeatedly to adjust the Volume.
• OPTION button:
  • Prewash: Use this option for loads that need pretreatment. It adds 13 to 17 minutes prewash and drain.
  • Rinse + Spin: Use this option to rinse and then spin.
  • Quick Cycle: The Quick offers a quick cycle time.
  • Stain Cycle: Add time to the wash and rinse for better stain removal. Automatically provides a rinse.
  • Tub Clean: Use this option to clean tub.
• Delay Wash, Water Plus / Extra Rinse:
  • Delay Wash allows the start of any cycle to be delayed for 1~19 hours.
  • Water Plus adds extra water to the wash and rinse cycles for superior results.
  • Extra rinse provides an additional rinse.
• EST. TIME REMAINING: This display shows: a) the estimated time remaining in the cycle when operation. b) an error code when an error has been detected.
• DOOR LOCKED lamp: Light whenever the door of the washer is locked. The door can be unlocked by pressing the Start/Pause button to stop the washer.

6. Wiring Diagram/Program Chart

Wiring Diagram

[Diagram: Electrical wiring schematic showing connections between various components like the Main PWB, Display PWB, Motor, Thermistor, Inlet Valve, Pressure Sensor, Door Lock Switch, etc.]

Program Chart

* Water Supply: W-S, * Intermittent Spin: I-S, * Disentangle: D-T

Pre-Setting Time: Water Supply - 60 sec. Drain - 60 sec. Wash time is in minutes.

** The total working time will vary with the load size, water temperature and ambient temperature.

7. Troubleshooting

7-1. Before Performing Service

Be careful of electric shock when disconnecting parts while troubleshooting.

The voltage of each terminal is 120 V AC and DC when the unit is plugged in.

7-2. QC Test Mode

The washer must be empty and the controls must be in the off state.

1. Press the SPIN SPEED and SOIL LEVEL buttons simultaneously.
2. Press the Power button, while the above condition. Then buzzer will sound twice.
3. Press the Start/Pause button repeatedly to cycle through the test modes.
4. The display alternates between: 18:88, 16:22, 4:09, and 14.

7-3. How to Check the Water Level Frequency

* Press the Delay and Signal button simultaneously.

[Symbol: Three asterisks ***]

The digits indicate the water level frequency (x.1 kHz). So, for example a display indicating 241: a Water level frequency of 241 x.1 kHz = 24.1 kHz.

7-4. Error Display

If you press the START/PAUSE button when an error is displayed, any error except 'PE' will disappear and the machine will go into the pause status.

In case of 'PE', 'LE', 'DE' if the error is not resolved within 20 sec., or in the case of other errors, if the error is not resolved within 4 min., power will be turned off automatically and the error code will blink. But in the case of 'FE', power will not be turned off.

8. Error Diagnosis and Check List

8-1. Diagnosis and Solution for Abnormal Operation

No Power

• Is the power plug connected firmly to 120 V AC outlet? [Symbol: Plug in outlet]
• Power failure? or Breaker opened? Is the outlet controlled by a switch? [Symbol: Circuit breaker]
• If NO to above, Visit to service.

Water Inlet Trouble

• Is 'IE' displayed? [Symbol: 'IE' error display]
• Is the tap opened? [Symbol: Water tap]
• Is the tap frozen? [Symbol: Frozen tap]
• Is the water supply shut-off? [Symbol: Water shut-off valve]
• Is filter in the inlet valve clogged with foreign material? [Diagram: Filter being cleaned]
• If NO to any of the above, Visit to service.

Door Error

• Started with door opened? [Diagram: Door with 'DE' error display]
• If YES, Close the door.
• Was the load too large?
• If YES, Avoid overloading.
• Clicking sound is heard once or twice, when the START/PAUSE button is pressed to start the cycle?
• If NO, Check if the door switch is OK. If still NO, Visit to service.

Drain Trouble

• Is 'DE' displayed? [Diagram: 'DE' error display]
• Is the drain pump filter clogged with foreign material such as pins, coins, etc? [Diagram: Clogged drain pump filter]
• If YES, Clean up the filter.
• Is the drain hose frozen, kinked, or crushed? [Diagram: Kinked drain hose]
• If NO, Visit to service.

Suds Overflow

(In this condition, wash and spin do not operate normally)

• Is a low-sudsing detergent used? [Symbol: LOW-SUDSING]
• Is the proper amount of detergent used as recommended?
• Recommend to reduce the amount of detergent.

This appliance has an automatic suds sensing function which prevents overflow. When excessive suds are sensed, the suds removing implementations such as drain, water input, pause will operate, without rotating the drum.

Liquid Laundry Products Do Not Flow In

• Is liquid laundry product put in the correct compartment of the dispenser? [Diagram: Dispenser with compartments labeled (1) Bleach, (2) Softener, (3) Prewash, (4) Main Wash]
• Is the cap clogged?
• If YES, Clean the compartment.
• Explain proper use of liquid laundry products.

8-2. Fault Diagnosis and Troubleshooting

CAUTION: Be careful of electric shock if disconnecting parts while troubleshooting.

1. First of all, check the connection of each electrical terminal with the wiring diagram.
2. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.

No Power

• Is the supplied voltage 120 V AC? [Diagram: Power plug in outlet]
• If NO, Check the fuse or reset the circuit breaker.
• Is the voltage between the pins of 2 FILTER ASSEMBLY connector 120 V AC? [Diagram: Filter assembly connector]
• If NO, Replace the FILTER ASSEMBLY (CIRC).
• Is the LED (1) on? [Diagram: PWB (MAIN) with LED indicator]
• If NO, Replace MAIN PWB ASSEMBLY.
• Are the connectors (2) on the PWB loose? [Diagram: PWB (MAIN) showing connectors]
• If YES, Reconnect.
• Is wire of the DISPLAY PWB ASSEMBLY broken? [Diagram: Display PWB assembly]
• If YES, Replace DISPLAY PWB ASSEMBLY or repair wire.
• If NO, Replace the MAIN PWB ASSEMBLY.

Vibration & Noise in Spin

• Have all the transit bolts and base packing been removed? [Diagram: Transit bolts removed from washer base]
• If NO, Remove the transit bolts and Base packing.
• Is the washer installed on a solidly constructed floor? [Diagram: Washer on a floor]
• If NO, Move the washer or reinforce the floor.
• Check if the washer is perfectly level as follows:
• Check the leveling of the washer with a Level and check that the washer is stable. [Diagram: Level tool on washer]
• Put an unbalance part (rubber) inside of drum and start QC test mode and run in high spin (Refer to section 7-2).
• When the machine is spinning in high speed, verify that it is stable.
• If you do not have the unbalance part, put 4.5 to 6.5 lbs (2 to 3 kg) of clothing. Once loaded, press power, Rinse+Spin and the start/pause button in sequence.
• When the machine is spinning in high speed, verify that it is stable.
• If it is not stable, adjust feet accordingly. After the washer is level, tighten the lock nuts up against of the base of the washer. All lock nuts must be tightened. [Diagram: Adjustable feet and lock nuts]

If it still has severe vibration and noise, regulate a specific spin speed that generates excessive vibration and noise as follows:

1. Put an unbalance part (rubber) inside of the drum.
2. Start the QC test mode (Refer to section 7-2).
3. Press Delay Wash button, then '5' is displayed.
4. Press the Spin Speed button repeatedly to select EXTRA HIGH.
5. Press the Start/Pause button.
6. Press the Signal button repeatedly to set spin speed (600, 700, 800, 900, 1000, 1100 rpm) and check if there is vibration and noise.
7. If there is no vibration and noise, increase the spin speed by pressing Signal button.
8. If there is vibration and noise, press the Cycle selector button to reduce the Spin Speed (reduce by 50 and 100 rpm). In case of 600 rpm, it can not reduce the spin speed.
9. If vibration and noise are reduced, press the WASH/RINSE button to store (2 beep sounds).

* If you want to return to factory default spin speed setting, repeat above steps except step 8).

No Water Supply

• Is water supply shut-off? [Diagram: Water tap]
• If NO, Is the tap opened? [Diagram: Water tap]
• If NO, Open the tap.
• When you press both SPIN SPEED button and SOIL LEVEL button simultaneously, is the water level frequency below 246? [Symbol: Three asterisks ***]
• If YES, Check the AIR CHAMBER and the tube (clogged).
• Is the inlet valve filter clogged? [Diagram: Inlet valve filter]
• If YES, Clean the filter.
• Is resistance between each terminal of INLET VALVE ASSEMBLY 0.8-1.2 kΩ? [Diagram: Inlet valve assembly]
• If YES, Verify the voltage of the inlet valve connector is 120 V AC. (Refer to 7-2 QC TEST MODE)
• If NO, Replace the INLET VALVE ASSEMBLY.
• If NO to voltage check, Check electrical connection. Replace the MAIN PWB ASSEMBLY.

Detergent Does Not Flow In

• Is water supplied?
• If NO, Refer to "NO WATER SUPPLY".
• Are receptacles correctly connected to the terminals of the INLET VALVE ASSEMBLY? [Diagram: Inlet valve assembly wiring]
• If NO, Check the wiring.
• Has detergent been put in the correct compartment of the dispenser? [Diagram: Dispenser with compartments]
• If NO, Put the detergent in the correct place.
• Is the detergent caked or hardened?
• If YES, Clean the dispenser.

Softener/Bleach Does Not Flow In

• Is water supplied?
• If NO, Refer to "NO WATER SUPPLY".
• Are the plugs correctly connected to the terminals of the INLET VALVE ASSEMBLY?
• If NO, Check the wiring on the dispenser.
• Is softener/bleach put in the correct compartment of the drawer? [Diagram: Dispenser drawer]
• If NO, Put it in the correct compartment.
• Is the softener/bleach cap clogged? [Diagram: Bleach cap, Softener cap]
• If YES, Clean the Cap and Container.

Abnormal Sound

• Is the motor bolt loosened? [Diagram: Motor bolt]
• If NO, Secure the bolt.
• Is there friction noise coming from the motor? [Diagram: Motor]
• If YES, Replace the STATOR ASSEMBLY or ROTOR ASSEMBLY.

Heating Without Water

• When pressing SPIN SPEED and SOIL LEVEL at the same time after draining, is the water level frequency 255?
• When pressing SPIN SPEED and SOIL LEVEL buttons at the same time while washing, is the water level frequency between 230 - 243?
• If NO to either, Replace the SENSOR SWITCH ASSEMBLY.
• Check the voltage between two pins while pressing the POWER button. Is the voltage 120 V AC? [Diagram: PWB ASSEMBLY, MAIN]
• If YES, Replace the MAIN PWB ASSEMBLY.

Drain Malfunction

• Is the drain hose twisted or frozen? [Diagram: Drain hose]
• If YES, Repair the DRAIN HOSE ASSEMBLY.
• Is the impeller of the drain pump clogged? [Diagram: Drain pump impeller]
• If YES, Remove foreign material.
• Is the connector disconnected, disassembled? [Diagram: Connector]
• If YES, Reconnect or repair the connector.
• Is the coil of the drain pump too high or low? (resistance of the coil is 10-20 Ω) [Diagram: PWB ASSEMBLY, MAIN]
• If YES, Replace the DRAIN PUMP ASSEMBLY.
• When checking voltage between connectors during spin, is the voltage 120 V AC as in the figure?
• If NO, Replace the MAIN PWB ASSEMBLY.

Spin Trouble

• Check during spin if the frequency of the water level is 248 or more.
• If YES, Press the START/PAUSE button 2 times in QC test mode, is the drum spinning at low speed?
• If NO, Check the SENSOR SWITCH ASSEMBLY or HOSE (Pressure). If the problem is on the SENSOR SWITCH ASSEMBLY or the HOSE, replace the SENSOR SWITCH ASSEMBLY or the HOSE.
• If YES, Normal.
• Is it disconnected, or disassembled? (Red: 3pin (1), NA: 4pin (2)) [Diagram: Motor terminals with numbered connections]
• If YES, Correct the connection.
• Check the motor connector, Is the resistance of the terminal the same as the figure? Resistance of terminal: 1-2/2-3/3-1: About 5 Ω-15 Ω
• If YES, Replace the MAIN PWB ASSEMBLY.
• If NO, Replace the STATOR ASSEMBLY.

Error (Latch Hook / Door Switch)

• Does the spring of Latch Hook actuate? [Diagram: Latch Hook]
• If NO, Replace Door Assembly.
• Is there clicking sound once or twice when the START/PAUSE button is pressed to start the cycle?
• If YES, Check the DOOR SWITCH ASSEMBLY Connector and MAIN PWB ASSEMBLY (Red 3 pin, Yellow 4 pin and white 3 pin connector (1)).
• Is DOOR SWITCH ASSEMBLY broken?
• If YES, Replace the DOOR SWITCH ASSEMBLY.

9. Disassembly Instructions

* Be sure to unplug the machine out of the outlet before disassembling and repairing the parts.

Control Panel Assembly

1. Unscrew 2 screws on the back of the top plate.
2. Pull the top plate backward and upward as shown. [Diagram: Top plate assembly]
3. Disconnect the connectors from the Main PWB Assembly.
4. Pull out the drawer and unscrew 2 screws. [Diagram: Drawer and Control Panel Assembly]
5. Lift the left side of the Control Panel Assembly and pull it out.
6. Pull out the control Panel unscrew 1 screws. [Diagram: Control Panel Assembly]
7. Unscrew the 9 screws from the Control Panel Assembly.
8. Disassemble the Display PWB Assembly. [Diagram: Display PWB Assembly]

Main PWB Assembly

1. Disconnect the POWER connector and SENSOR SWITCH ASSEMBLY.
2. Remove the Protect Cover. [Diagram: PROTECT COVER]
3. Disassembled keeping wire.
4. Disconnect the connectors.
5. Unscrew 1 screw on the back.
6. Disassemble the Main PWB. [Diagram: Main PWB]

Dispenser Assembly

1. Disassemble the top plate assembly.
2. Pull out the drawer. [Diagram: Drawer, Control Panel Assembly]
3. Push out the DISPENSER ASSEMBLY after unscrew 2 screws.
4. Unscrew the nut at the lower part of the dispenser.
5. Disassemble the 4 connectors from the valves.
6. Wire Color: ① Blue Housing (OR-BK), ② White Housing (WH-BK), ③ Blue Housing (GY-BK), ④ Red Housing (BL-BK)
7. Unscrew 2 screws from the back of the cabinet.
8. [Diagram: Dispenser Assembly components]

Noise Filter

1. Disassemble two connectors from the Filter Assembly.
2. Unscrew a screw from the TOP BRACKET. [Diagram: Noise Filter components]

Cabinet Cover

1. Unscrew the 3 screws from upper of the cabinet cover.
2. Unscrew the screw from filter cover. [Diagram: Cabinet Cover, Filter Cover]
3. Put a flat ( - ) screwdriver or putty knife into the both sides of the filter cover, and pull it out.
4. Unscrew the screw from the lower side of the cabinet cover.
5. Open the door.
6. Disassemble the clamp assembly. [Diagram: Door, Clamp Assembly]
7. Tilt the cabinet cover.
8. Disconnect the door switch connector.
9. NOTE: When assembling the CABINET COVER, connect the connector.
10. Lift and separate the cabinet cover. [Diagram: Cabinet cover being lifted]
11. Disassemble the clamp assembly.
12. Disassemble the Gasket. [Diagram: Gasket]

Door

1. Open the door.
2. Unscrew the 7 screws from the HINGE COVER. [Diagram: Door, Hinge Cover]
3. Put a flat ( - ) screwdriver into the opening of the hinge, and pull out the hinge cover.
4. Unscrew a screw from the lower side of door.
5. Disassemble the door upward.
6. Be careful! The door is heavy.

Door Lock Switch Assembly

1. Open the door and disassemble the CLAMP ASSEMBLY.
2. Unscrew the 2 screws.
3. NOTE: Reconnect the connector after replacing the DOOR SWITCH ASSEMBLY.

Pump

1. Disassemble the cabinet cover.
2. Separate the pump hose, the bellows and the circulation hose assembly from the pump assembly.
3. Disassemble the pump assembly in arrow direction. [Diagram: Pump assembly, Pump hose, Bellows]

Thermistor

1. Disassemble the Back cover.
2. Unscrew a screw from the Tub.
3. Unplug the white connector from the thermistor.
4. Pull it out by holding the bracket of the thermistor. [Diagram: Thermistor, Connector]

Motor/Damper

1. Disassemble the back cover.
2. Remove the bolt.
3. Pull out the Rotor. [Diagram: Rotor, Bolt]
4. Unscrew the 2 screws from the tub bracket.
5. Remove the 6 bolts on the stator.
6. Unplug the 2 connectors from the stator. [Diagram: Stator, Connectors]
7. Disassemble the damper hinges from the tub and base.
8. Separate the dampers.
9. NOTE: Once removed, replace the damper with new one. [Diagram: Damper, Hinge Damper]

10. Exploded View

10-1. Cabinet & Control Panel Assembly

[Diagram: Exploded view of the washing machine's outer structure and control panel components, with labels (Axxx, Fxxx).]

[Table: Parts list for Cabinet & Control Panel Assembly, e.g., Owner's Manual, Service Manual, etc.]

10-2. Drum & Tub Assembly

[Diagram: Exploded view of the internal drum and tub components, with labels (Kxxx, Fxxx).]

10-3. Dispenser Assembly

[Diagram: Exploded view of the detergent dispenser components, with labels (Fxxx, Axxx).]