LG WM3677HW Training Manual
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LG WM3677HW Training Manual

LG WM3677HW Training Manual

Washer/dryer combo
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See also: Service Manual , Owner's Manual
WASHER/DRYER
COMBO
TRAINING MANUAL
CAUTION!
READ THIS MANUAL CAREFULLY
BEFORE DIAGNOSING OR SERVICING THIS PRODUCT.
http://us.lgservice.com

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Summary of Contents for LG WM3677HW

  • Page 1 http://us.lgservice.com WASHER/DRYER COMBO TRAINING MANUAL CAUTION! READ THIS MANUAL CAREFULLY BEFORE DIAGNOSING OR SERVICING THIS PRODUCT.
  • Page 2 Customer Service (and Part Sales) (800) 243-0000 Technical Support (and Part Sales) (800) 243-0000 USA Website us.lge.com Customer Service Website us.lgservice.com B2B Service Website aic.lgservice.com LG CS Academy lgcsacademy.com Published September 2005 by LG Technical Support Service...

  • Page 3: Table Of Contents

    COMBO WM3677COMBO (Washer/Dryer) Contents Safety Notices and Warnings OVERVIEW Introduction Specifications Serial Numbers Features INSTALLATION Preparation Connections Water Electrical Drain OPERATION Control Panel Program Chart Dispenser TROUBLESHOOTING Test Mode Checking Water Level Frequency Test Flow Chart Error Codes Diagnosis and Check List DISASSEMBLY and REPAIR Control Panel Main PWB...

  • Page 4: Safety Notices And Warnings

    LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for service, they must be returned to their original positions and properly fastened.

  • Page 5: Overview

    Notice the dryers at the Laundromat have twice the capacity of the washers. Similarly, the LG dryer (DLG5988 ~ 7.3 cu. ft.) has twice the capacity of the washer (WM2277HW ~ 3.7 cu. ft.). To use the drying function effectively, the user must fill the COMBO no more than half full of laundry to dry the load after washing.

  • Page 6: Specifications

    COMBO SPECIFICATIONS COMBO WM3766HW Color White, Black, Titanium Wash Capacity 3.22 cu. ft.t3 (3.72 ft IEC) Dry Capacity Max. 11 lbs. (8 kg) Power Supply 120 VAC, 60 Hz, 5 Amps Washing 280 W Drain Motor 80 W Energy Fan Motor 25 W Consumption Dry Heater...

  • Page 7: Serial Numbers

    COMBO SERIAL NUMBER IDENTIFICATION The serial number is unique to each product. It gives information concerning the time and place of manufacture. The serial number is required to be paid for warranty service and to get the correct part in the event a running production change was made.

  • Page 8: Features

    COMBO KEY FEATURES DIRECT DRIVE MOTOR The advanced brushless DC motor drives the drum directly without a belt or pulleys. TILTED DRUM & LARGE DOOR The 10° tilt and large door opening make it easy to load and unload the combo. WATER CIRCULATION The detergent solution in the drum is recirculated and sprayed repeatedly.
  • Page 9 COMBO FUZZY LOGIC To get the best washing performance, the user selects one of the standard cycles and sensors in the COMBO make an infinitely variable number of adjustments as the cycle progresses. Adjustments are made for load size, incoming water temperature, soil level, rinses required, and other variables. DOOR LOCK The door has an automatic, electrically operated lock system.
  • Page 10 COMBO WATER CIRCULATION The recirculation pump circulates the water during most of the cycle. During the WASH cycle, it runs continuously for 3 minutes and then intermittently throughout the cycle. During the RINSE cycle, it runs continuously as soon as the appropriate amount of rinse water has been added.
  • Page 11 COMBO (Back of COMBO) The air vent must be left open and clear at all times. If the combo is installed in a closet or closed laundry alcove, there must be sufficient clearance and ventilation. The closet should have a full louvered door with at least 800 square inches of open area for ventilation.

  • Page 12: Installation

    COMBO INSTALLATION REMOVE THE SHIPPING BOLTS. INSTALL THE COMBO ON A FIRM, FLAT SURFACE. ADJUST THE FEET TO BE LEVEL. WM3677 COMBO Page 12 of 68 TRAINING MANUAL...

  • Page 13: Connections

    COMBO CONNECTIONS WATER Be sure the rubber washer is inside the hose end. Attach the hoses to the COMBO (red is HOT, blue is COLD). Tighten them firmly but don’t strip the plastic threads on the washer connections. DRAIN The drain pipe should be firmly attached to the standpipe or the laundry tub or sink where it drains.

  • Page 14: Operation

    COMBO CONTROL PANEL The control panel is located on the front of the COMBO. All options are available from the control panel. WM3677 COMBO Page 14 of 68 TRAINING MANUAL...

  • Page 15: Program Chart

    COMBO PROGRAM CHART (WASHING) This chart shows the components and their times of operation in the various wash cycles. Remember that this time estimate is for the basic cycles before the fuzzy logic adjustments are made. The dryer can be set to dry for a specific time (30/60/90/120 minutes) or it can use a sensor to determine when the clothes are dry.

  • Page 16: Dispenser

    COMBO DETERGENT DISPENSER The dispenser drawer is a multi-chambered reservoir that allows the user to add all the appropriate laundry additives before starting the cycle. It has a place for pre-wash detergent, main wash detergent, fabric softener, and bleach. Powdered or liquid detergents may be used, but softener and bleach must be liquids.
  • Page 17 COMBO product into the tub. It is mixed with water before contacting the laundry to prevent spotting or damaging the fabric. Notice that the pre-wash and main wash fill tubes enter the dispenser at an angle. If one or the other fill valve is opened, the water goes into the appropriate detergent compartment.

  • Page 18: Test Mode

    COMBO TEST MODE The COMBO must be empty and off to enter TEST MODE. 1. Press and hold the SPIN SPEED and SOIL LEVEL buttons. 2. Press the POWER button. The buzzer will sound twice. 3. Press START/PAUSE repeatedly to cycle through the test modes. HOW TO CHECK THE WATER LEVEL FREQUENCY WM3677 COMBO Page 18 of 68...

  • Page 19: Test Flow Chart

    COMBO TEST OPERATION Always test the COMBO for proper operation after installation and after any repairs or adjustments are made. Use this flow chart. WM3677 COMBO Page 19 of 68 TRAINING MANUAL...

  • Page 20: Error Codes

    COMBO ERROR CODES • If you press START/PAUSE when an error code is displayed, the error code will disappear and the COMBO will go into PAUSE status. (Exception: PE) • In a case of PE, tE, or dE, if the error is not resolved within 20 seconds, the COMBO will power OFF.
  • Page 21 COMBO WM3677 COMBO Page 21 of 68 TRAINING MANUAL...

  • Page 22: Diagnosis And Check List

    COMBO DIAGNOSIS and CHECK LIST (Abnormal Operation) continued on next page WM3677 COMBO Page 22 of 68 TRAINING MANUAL...
  • Page 23 COMBO DIAGNOSIS and CHECK LIST (Abnormal Operation, continued) continued on next page WM3677 COMBO Page 23 of 68 TRAINING MANUAL...
  • Page 24 COMBO DIAGNOSIS and CHECK LIST (Abnormal Operation, continued) WM3677 COMBO Page 24 of 68 TRAINING MANUAL...
  • Page 25 COMBO FAULT DIAGNOSIS and TROUBLESHOOTING NO POWER WM3677 COMBO Page 25 of 68 TRAINING MANUAL...
  • Page 26 COMBO VIBRATION and SPIN NOISE WM3677 COMBO Page 26 of 68 TRAINING MANUAL...
  • Page 27 COMBO NO WATER SUPPLY DETERGENT DOES NOT DISPENSE WM3677 COMBO Page 27 of 68 TRAINING MANUAL...
  • Page 28 COMBO LIQUID DETERGENT/BLEACH/SOFTENER DO NOT DISPENSE ABNORMAL SOUND WM3677 COMBO Page 28 of 68 TRAINING MANUAL...
  • Page 29 COMBO HEATING WITHOUT WATER DRAIN MALFUNCTION WM3677 COMBO Page 29 of 68 TRAINING MANUAL...
  • Page 30 COMBO WASH HEATER MALFUNCTION OVERHEATING WATER (Above Set Temperature) WM3677 COMBO Page 30 of 68 TRAINING MANUAL...
  • Page 31 COMBO NO CIRCULATION WM3677 COMBO Page 31 of 68 TRAINING MANUAL...
  • Page 32 COMBO SPIN MALFUNCTION WM3677 COMBO Page 32 of 68 TRAINING MANUAL...
  • Page 33 COMBO ERROR CODE ERROR CODE WM3677 COMBO Page 33 of 68 TRAINING MANUAL...

  • Page 34: Dryer Fan/Heater Malfunction

    COMBO DRYER FAN MALFUNCTION DRYER HEATER MALFUNCTION Repair instructions are on page 55. WM3677 COMBO Page 34 of 68 TRAINING MANUAL...

  • Page 35: Disassembly And Repair

    COMBO DISASSEMBLY and REPAIR CONTROL PANEL Unplug the COMBO before disassembly and repair. Remove the two screws on the top of the back plate. Slide the top plate backward and lift it, as shown. Disconnect the Display PWB connectors. (3 connectors) Remove the dispenser drawer.

  • Page 36: Main Pwb

    COMBO MAIN PWB Disconnect the POWER connector and the SENSOR SWITCH assembly. Remove the protective cover by lifting the plastic clips around the top and sides. Disconnect all the connectors. Note that they are all different shapes and colors to prevent any mistakes upon replacement.

  • Page 37: Dispenser

    COMBO DISPENSER Remove the top plate. Remove the dispenser. Remove the two screws from the front of the dispenser. Remove the clamp and the large hose on the back of the dispenser. Leave the small feed hoses on the dispenser. Disconnect the electrical connectors on the valves.

  • Page 38: Noise Filter

    COMBO NOISE FILTER Unplug the power connection from the MAIN PWB. Disconnect the two connectors from the power cord. Remove the screw and ring connector for the ground. Replace the screw and any wires other than the ground for the noise filter. Remove the screw securing the noise filter to the frame of the COMBO.

  • Page 39: Front Cabinet Cover

    COMBO FRONT CABINET COVER Remove the four screws from the top edge of the front cabinet cover. Remove the screw behind the filter cover. Use a putty knife or screwdriver on both sides (one at a time) of the filter cover and pull it out. Remove the screw that was hidden by the filter cover.
  • Page 40 COMBO Tilt out the cabinet cover. Disconnect the door switch connector. (Don’t forget it when you put the cover back on!) Lift the cabinet cover (front) off and set it aside where it will not fall or be damaged. Remove the gasket clamp on the tub side.

  • Page 41: Door And Door Lock Switch

    COMBO DOOR Open the door. Remove the seven screws from the hinge cover. Put a flat screwdriver into the hinge opening and gently pry off the hinge cover. Remove the screw from the lower hinge pin. Lift the door off the hinge. BE CAREFUL! The door is heavy! DOOR LOCK SWITCH ASSEMBLY Open the door.

  • Page 42: Motor

    COMBO MOTOR The direct drive motor is a brushless DC motor built on the shaft of the drum. The elimination of belts and pulleys allows greater efficiency and reliability with less noise and vibration. The use of direct current allows the MICOM to control both the speed and the direction of rotation.
  • Page 43 COMBO MOTOR (continued) This motor is a 36-pole DC direct-drive motor. There are 12 magnets permanently attached to the rotor. Each magnet is opposite 3 poles of the stator at any given time. A Hall Effect sensor is mounted on the stator. It counts the poles of the magnets as the rotor turns to feedback the information to the controller.

  • Page 44: Damper

    COMBO MOTOR (continued) Remove the back cover. Remove the large bolt (17 mm) from the center of the rotor. Pull the rotor off the shaft. (You may have to wiggle it off. The shaft is splined. When replacing it, you may need a helper to keep the drum from being pushed forward so the bolt will reach and can be...

  • Page 45: Tub Removal And Repair

    COMBO TUB REMOVAL AND REPAIR Removing the tub requires that you first remove the control panel and the front panel. The front panel can be removed without removing the door. (See previous pages for this procedure.) When the front has been removed, it is easy to remove the tub.
  • Page 46 COMBO TUB REMOVAL AND REPAIR, continued. Remove the back cover. (Six screws.) Remember to drain the water if you haven’t already done it. Remove the large bolt securing the rotor. This is much easier if there is an assistant available to hold the drum still on the inside while loosening the bolt.
  • Page 47 COMBO TUB REMOVAL AND REPAIR, continued. Remove the clamp where the dryer duct connects to the gasket. Separate the gasket and duct for when the tub comes out. This will allow the dryer assembly to remain in place when the tub comes out.
  • Page 48 COMBO TUB REMOVAL AND REPAIR, continued. Open the spring clip on each side where the spring supports the tub. Lift the springs out of the holders and take the tub out through the front of the COMBO. (This may require a helper!) Separate the tub halves to remove the drum.
  • Page 49 COMBO TUB REMOVAL AND REPAIR, continued. Remove two bolts from the end on the spider of the drum. Then remove the screw on the outside of the drum. Squeeze the sides of the baffle slightly to release the positioning tabs. Repairing or replacing the roller jet (baffle) requires removing the drum.

  • Page 50: Water Level Switch

    COMBO WATER LEVEL SWITCH The water level detector switch monitors the water level and feeds this information to the MICOM. The sensor reads air pressure in an air chamber on the tub. The air pressure changes in relation to the depth of the water, moving a diaphragm in the switch.

  • Page 51: Pumps (Drain And Circulating)

    COMBO PUMP Remove the cabinet (front). Remove the pump hose, the bellows, and the circulation hose from the pump body. Remove the two screws on the front plate. Push the pump backward and lift it out. (See drawing.) The drain pump and the circulating pump are attached to either side of the filter housing.

  • Page 52: Water Heater And Thermistor

    COMBO WATER HEATER Remove the front cover. Separate the connectors from the heater element. Remove the nut (also the ground connection) and pull the heater out. THERMISTOR Remove the front cover. Disconnect the thermistor at the white connector. Pull the thermistor out by the bracket.

  • Page 53: Ball Sensor (Unbalance Switch)

    COMBO BALL SENSOR (Unbalance Switch) The BALL SENSOR is so named DIODE (light emitting) because it contains a small ball covering an even smaller hole. The ball rests so it blocks the light from the LED above from shining through the hole to light BALL the phototransistor below.
  • Page 54 COMBO BALL SENSOR (continued) Remove the four screws and the back cover. Remove the single screw that secures the sensor (bottom right as you face the back of the COMBO.) Separate the connector. WM3677 COMBO Page 54 of 68 TRAINING MANUAL...

  • Page 55: Dryer Repair

    COMBO DRYER REPAIR The dryer portion of the COMBO is a condenser type dryer. It works on the principal that water condenses on a cool surface, similar to moisture collecting on a cold drink on a hot and humid summer day. A fan circulates air through the warming duct, drum, and condenser and over and over.
  • Page 56 COMBO Dryer Repair, continued Release the clamp and remove the dryer water supply hose at the solenoid end. Lift out the condenser duct assembly. Be careful to avoid damaging the boot. Leave the hose in the duct end. If this comes out, you must first fit the gasket into the hole in the duct, with the smaller side of the gasket facing the duct.

  • Page 57: Main Pc Board

    COMBO MAIN BOARD The main board controls all the functions of the COMBO. All the sensors in the machine report to the main board and the microprocessor makes all adjustments based on sensor input. There are no panel controls for such things as water level or washing time because these are determined via fuzzy logic based on the selected cycle and sensor input.

  • Page 58: Wiring Diagram

    COMBO WIRING DIAGRAM WM3677 COMBO Page 58 of 68 TRAINING MANUAL...

  • Page 59: Exploded Views

    COMBO EXPLODED VIEW (Control Panel and Cabinet) WM3677 COMBO Page 59 of 68 TRAINING MANUAL...
  • Page 60 COMBO EXPLODED VIEW (Drum and Tub) WM3677 COMBO Page 60 of 68 TRAINING MANUAL...
  • Page 61 COMBO EXPLODED VIEW (Dispenser) WM3677 COMBO Page 61 of 68 TRAINING MANUAL...
  • Page 62 COMBO EXPLODED VIEW (Dryer Parts) WM3677 COMBO Page 62 of 68 TRAINING MANUAL...

  • Page 63: Parts List 061130

    COMBO PARTS LIST Loc # Part No Description *001 3829ER3025L OWNERS MANUAL *002 3890EZ3524A *003 3W20018B WRENCH *004 3828ER3027G SERVICE MANUAL A100 3091ER0004A CABINET ASSEMBLY A101 3808FR1202A BACK COVER A102 4830ER3001A BUSHING A103 4930ER3014A HOLDER A104 4011FR3159E BOLT ASSEMBLY A105 4011FR3159D BOLT ASSEMBLY A110...
  • Page 64 Loc # Part No Description A450 6871ER1003E MAIN PWB (PCB) ASSEMBLY A455 3550ER1020A MAIN PWB PROTECTIVE COVER A485 6201EC1006A FILTER ASSEMBLY(CIRC) A490 4811ER3001A BRACKET ASSEMBLY A495 6501FA2462C SENSOR ASSEMBLY F110 6871EC1116B DISPLAY PWB (PCB) ASSEMBLY F120 6877ER1023J PWB HARNESS F130 6850EC2001D FLAT CABLE F140...
  • Page 65 Loc # Part No Description K110 3045ER1006A TUB ASSEMBLY, INNER [DRUM] K111 4433ER1001A LIFTER ASSEMBLY K115 4434ER0001A SPIDER K121 4280FR4048L BEARING, BALL K122 4280FR4048E BEARING, BALL K123 4040FR4051C BOLT ASSEMBLY K125 4036ER2004A SEAL K130 4866ER1013A BALANCE WEIGHT K131 1SZZER4002A SCREW, DRAWING K135 4866ER0004A BALANCE WEIGHT...
  • Page 66 Loc # Part No Description M120 5209ER0002B DUCT ASSEMBLY M121 5200ER3001A PIPE M130 5214ER4001C HOSE,INLET M210 6931FR3108A THERMOSTAT ASSEMBLY M215 4036FR4045A SEAL M220 5301FR2076G HEATER ASSEMBLY M230 6322FR2046C THERMISTOR ASSEMBLY M235 6322FR2046J THERMISTOR ASSEMBLY M240 6901ER4001A FUSE ASSEMBLY M260 4860ER3002A CLAMP M310 4738ER2005A...
  • Page 67 (this page intentionally blank)
  • Page 68 © 2005 LG Electronics, Inc. Printed in the USA...

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