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WASHING MACHINE SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE PROBLEMS CORRECTLY BEFORE SERVICING THE UNIT.
MODEL :WM3997H*A
REV2015 PRINTED IN KOREA
P/No.: MFL67307985R
69
CONTENTS
4
WM3997H*A
WARNING: Wash hands after handling
2. FEATURES & TECHNICAL EXPLANATION
2-1. FEATURES
Ultra Capacity
The larger drum enables not just higher head drop and stronger centrifugal force, but also less tangling and wrinkling of the laundry. Heavier loads, such as king size comforters, blankets, and curtains, can be washed.
Direct Drive System
The advanced brushless DC motor directly drives the drum without belt and pulley.
Tilted Drum and Extra Large Door Opening
Tilted drum and extra large opening make it possible to load and unload clothing more easily.
Steam Washing
Steam washing features upgraded washing performance with low energy and water consumption.
RollerJets
Washing ball enhances the wash performance and reduces damage to the clothing. The jets spray and help tumble clothes to enhance washing performance while maintaining fabric care.
Automatic Wash Load Detection
Automatically detects the load and optimizes the washing time.
Built-in Heater
Internal heater helps to maintain water temperature at its optimum level for selected cycles.
Child Lock
The child lock prevents children from pressing any button to change the settings during operation.
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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.
water temperature washing time
selected washing temperature
NEUROFUZZY
rinsing time spin rhythm, time
the best washing performance
load size
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 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.
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2-5. THE DOOR CAN NOT BE OPENED
While program is operating. When a power failed and power plug is taken out in operation. While Door Lock lights turn on. White 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 Pre-Wash button for 3 seconds to lock/unlock control. When child lock is set, CHILD LOCK lights and all buttons are disabled except the POWER button. You can lock the controls of the washer while washing. CHILD LOCK lasts after the end of cycle. If you want to deactivate this function, Press and hold the Pre-Wash button for 3 seconds.
2-8. WATER CIRCULATION
When washing and rinsing function of shower at the upper part of Gasket. When washing, it continuously operates for 3 minutes and intermittently. When rinsing, it continuously operates after completion of water supply.
2-9. STEAM
For tough stained clothes, sick room linens, or baby clothes. Steam Wash is available with Sanitary, Bulk/Large, Perm. Press, Cotton/Normal, and Baby Wear cycles. This option features upgraded washing performance with low energy and water consumption. Do not load delicates such as wool, silk, and easily discolored clothes.
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3. PARTS IDENTIFICATION
Accessories
4.INSTALLATION & TEST
1 2 3 4 5 6 7 Before servicing, ask the customer what the trouble is. When installing or repairing the washer, put on long gloves and safety glasses. Check the setup (power supply is 120 VAC, remove the transit bolts, level the washer, etc.) Check with the troubleshooting guide. Plan your service method by referring to the disassembly instructions. Service the unit. After servicing, operate the appliance to see whether it functions correctly.
STANDARD INSTALLATION
The appliance should be installed as follows:
REMOVE THE SHIPPING BOLTS
Remove the 4 shipping bolts with the supplied wrench. Remove the lower bolts fist. It is easier that way.
INSTALL THE APPLIANCE ON A FLAT AND FIRM SURFACE
ADJUST THE LEVELLING
Turn the levelling feet to adjust the appliance.
Keep the shipping bolts and spanner for future use. Insert the 4 caps (provided) into the hole.
Lower Higher
Keeping
Turn clockwise to raise; counterclockwise to lower.
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HOW TO CONNECT THE INLET HOSE
Verify that the rubber washer is inside of the valve connector. Tighten the inlet hose securely to prevent leaks. Install the inlet hose to correct temperature water tap. Otherwise, it cause drips on the drawer panel handle and drawer panel.
Hot Cold
CONNECT THE DRAIN HOSE
· Make sure that the hose is not twisted.
· Avoid submerging the end of the hose.
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.
· Avoid connecting several electric devices, as doing so may cause a fire.
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7 TEST OPERATION
1
Preparation for washing.
2
Press the POWER button.
3
Press the START/PAUSE button.
· Connect the power plug to the outlet. · Connect the inlet hoses.
· Listen for a click to determine if the door has locked.
6
Check the water heating function.
5
Check the automatic reverse rotation.
4
Check the water supply.
· Press the WASH/RINSE button and the present temperature will be displayed.
· Check if the drum rotates clockwise and counterclockwise.
· Check if water is supplied through the detergent dispenser.
7
Check the drain and spin functions.
8
Press the START/PAUSE button.
9
Water removal
· · · ·
Power off and the power on. Press the SPIN SPEED button. Press the START/PAUSE button. Check the spin and drain functions. · Listen for a click to determine if the door is unlocking. · If SERVICE is needed during check, remove the remaining water by pulling out the hose cap.
12
Delay Wash Pre Wash
Power On/Off
Start / Pause
Wash Temp.
Spin Speed
Soil Level
Dry
Use this button to turn the power On/Off.
Use this button to Start/Stop the washer. It shows elapsed time of the cycle the washer is operating.
The control panel offers readout of diagnostic parameters while laundry is in process. Press and hold both buttons simultaneously to access each parameter listed below: Wash Temp. + Spin Speed Cabinet Temperature °C Wash Temp. + Dry Hot Air Output Temperature °C Wash Temp. + Delay Wash Water Temperature °C Spin Speed + Delay Wash Spin Speed RPM Spin Speed + Dry Air Heating Element Power Pre Wash + Delay Wash Wash Cycle 92 Pre Wash + Dry Dry Cycle 92 Soil Level + Delay Wash Water Level* (* Empty=255 Wash~239 Maximum=229)
If controls are inoperative and CL flashes on the display then the Child Lock feature has been activated. Hold the Pre-Wash button for 3 sec to return to normal operation.
5. EXPLANATION
Information
5. EXPLANATION
Information
7. TEST MODE
SPIN SPEED
SOIL LEVEL
SOIL LEVEL
DELAY WASH
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8. TROUBLESHOOTING
18
ERROR 8
LOCKED MOTOR ERROR
SYMPTOM
CAUSE
· The connector (3-pin, male, white) in the MOTOR HARNESS is not connected to the connector (3-pin, female, white) of STATOR ASSEMBLY. · The electric contact between the connectors (3-pin, male, white) in the MOTOR HARNESS and 4-pin, female, white connector in the MAIN PWB ASSEMBLY is bad or unstable. · The MOTOR HARNESS between the STATOR ASSEMBLY and MAIN PWB ASSEMBLY is cut (open circuited). · The hall sensor is out of order/defective. · EEPROM is out of order. Displayed only when the START/PAUSE button is first pressed in the Load Test Mode. · After the power supply is stopped while washing machine is working, the power is supplied rapidly.
9
EEPROM ERROR
10
POWER FAILURE
If controls are inoperative and CL flashes on the display then the Child Lock feature has been activated. Hold the Pre-Wash button for 3 sec to return to normal operation.
19
8-3. FAULT DIAGNOSIS AND TROUBLESHOOTING
CAUTION
1. Be careful of electric shock if disconnecting parts while troubleshooting. 2. First of all, check the connection of each electrical terminal with the wiring diagram. 3. If you replace the MAIN PWB ASSEMBLY, reinsert the connectors correctly.
NO POWER
Is the supplied voltage 120V AC?
Check the fuse or reset the circuit breaker.
Is the voltage between the 2 FILTER ASSEMBLY connectors 120V AC?
Replace the FILTER ASSEMBLY (CIRC).
Is the LED (1) on?
Replace MAIN PWB ASSEMBLY.
Are the connectors (2) on the PWB loose?
Reconnect.
Is wire of the DISPLAY PWB ASSEMBLY broken?
Replace the MAIN PWB ASSEMBLY.
Replace DISPLAY PWB ASSEMBLY or repair wire.
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VIBRATION & NOISE IN SPIN
Remove the transit bolts and base packing.
Have all the transit bolts and base packing been removed?
Is the washer installed on a solidly constructed foor?
Move the washer or reinforce the foor.
Check if the washer is perfectly level as follows:
Check the levelling of the washer with a level and check that the washer is stable.
Put an unbalance part (rubber) inside of the 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 buttons 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 the base of the washer. All lock nuts must be tightened
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If it still has severe vibration and noise, regulate a specific spin speed that generates excessive vibration and noise as follows (not applicable to all models): 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 ` ' is displayed. 4) Press the Spin Speed button repeatedly to select Extra High. 5) Press the Quick Cycle button, the spin speed is displayed. 6) Press the Start/Pause button. 7) Press the Beeper button repeatedly to set spin speed (600, 800, 1000, 1200 rpm) and check if there is vibration and noise. 8) If there is no vibration and noise, increase the spin speed by pressing Beeper button. 9) If there is vibration and noise, rotate the Cycle selector knob clockwise to reduce the Spin Speed (reduce by 50 and 100 rpm). In case of 600 rpm, it can not reduce the spin speed. 10) If vibration and noise are reduced, press the Quick Cycle button to store (2 beep sounds). * If you want to return to factory default spin speed setting, repeat above steps except step 9).
22
When you press both SOIL LEVEL button and DELAY WASH button simultaneously, is the water level frequency below 246?
5
Verify the voltage of the inlet valve connector is 120 V AC.
Steam 4 Dry
5
Steam
4 Dry
23
Softener cap
24
HEATING WITHOUT WATER
When pressing SOIL LEVEL and DELAY WASH at the same time after draining, is the water level frequency 255? When pressing SOIL LEVEL and DELAY WASH at the same time while washing, is the water level frequency 230-243?
Check the voltage between two pins while pressing the POWER button. Is the voltage 120 V AC?
DRAIN MALFUNCTION
When checking voltage between connectors during spin, is the voltage 120 V AC as in the fgure?
25
WASH HEATER TROUBLE
is s yk
~o
is
ir
s ~o
yk is
ir s is ~o ~o zi
yk
zi zi
When checking the voltage between connector during whites washing. Is the voltage 120 V AC:
~o
zi
~o
HEATING CONTINUOUSLY ABOVE THE SETTING WATER TEMPERATURE
When pressing WASH TEMP and DELAY WASH buttons at the same time, is the Displayed water temperature over 10 °C higher than the selected temperature?
When checking the THERMISTOR on the tub, is the THERMISTOR loose?
Push the THERMISTOR tightly to the rubber.
26
WILL NOT CIRCULATE WATER
Is the impeller of the drain pump clogged?
Remove foreign material
Are the Hose Connector and/or Hose clogged?
Remove foreign material
Is the connector disconnected, disassembled?
Reconnect or repair the connector.
Is the coil of the right side of drain pump open or short circuited? (Coil R is 18-30)
Replace PUMP MOTOR ASSEMBLY.
When checking voltage between the connectors during spin, is the voltage 120 V AC, as in fgure?
Replace the MAIN PWB ASSEMBLY.
27
SPIN TROUBLE
Press SOIL LEVEL and DELAY WASH at the same time during spin cycle, to check if the frequency of the water level is 248 or more. 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.
Hold SPIN SPEED and SOIL LEVEL pressed while powering on, to enter QC mode. Then press the START/PAUSE button 2 times. Is the drum spinning at low speed?
Normal.
Is it disconnected, or disassembled? [ Red: 3pin (1), NA: 4pin (2) ]
(1) (2)
Correct the connection.
Check the motor connector. Is the resistance of the terminal the same as the fgure? MOTOR TERMINAL Resistance of terminal: About 5 - 15 Replace the STATOR ASSEMBLY.
Replace the MAIN PWB ASSEMBLY.
Does the spring of Latch Hook actuate?
Replace Door Assembly. Check the DOOR SWITCH ASSEMBLY Connector and MAIN PWB ASSEMBLY (Red 3 pin, Yellow 4 pin and white 3 pin connector (1)). Replace the DOOR SWITCH ASSEMBLY.
Is there a clicking sound once or twice when the START/PAUSE button is pressed to start the cycle?
(1)
Is DOOR SWITCH ASSEMBLY broken?
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Is the resistance of thermistors on dry duct 2.5k1 - 180k1 (at 100 ~ 0
Replace the thermistor. 6322FR2046C : Dry Duct
Disassemble the cabinet cover and condensing bellows. Is there any foreign object in the condensing bellows.
Clean the bellows
Disassemble the dry fan assembly and dry duct upper, and remove foreign objects in duct and fan.
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9.
DISASSEMBLY INSTRUCTIONS
Be sure to unplug the machine before disassembling and repairing the parts.
CONTROL PANEL
TOP PLATE ASSEMBLY 1 Unscrew 2 screws on the back of the top plate. 2 Pull the top plate backward and upward as shown.
3 Disconnect the Display PWB assembly connector from the cabling. DRAWER 4 Pull out the drawer and unscrew 2 screws.
CONTROL PANEL ASSEMBLY
5 Remove one screw. 6 Lift the side the control panel assembly and pull it out.
CONTROL PANEL ASSEMBLY
DISPLAY PWB ASSEMBLY
7 Unscrew the 8 screws from the control panel assembly. 8 Disassemble the display PWB assembly.
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MAIN PWB ASSEMBLY
1 Disconnect the POWER connector and the pressure switch assembly. 2 Remove the protective cover.
PROTECT COVER
3 Disconnect the connectors.
4 Unscrew 1 screw on the back. 5 Remove the main PWB.
32
Disassemble the top plate assembly. Pull out the drawer Push out the DISPENSER ASSEMBLY after unscrew 2 screws.
Unscrew the nut at the lower part of the dispenser.
5 Disassemble the 4 connectors from the valves.
Wire color
5
1 Blue Housing (YL-BK) 2 Red Housing (VT-BK) 3 White Housing (WH-BK) 4 Blue Housing (GY-BK) 5 Red Housing (BL-BK)
6 Unscrew 2 screws from the back of the cabinet.
Unscrew a screw from the TOP BRACKET. Disassemble two connectors from the POWER CORD.
33
Open the door. Unscrew the 7 screws from the HINGE COVER.
Put a flat ( - ) screwdriver into the openng of the hinge, and pull out the hinge cover.
Unscrew a screw from the lower side of door. Disassemble the door upward.
Be careful! The door is heavy.
Open the door and disassemble the CLAMP ASSEMBLY. Unscrew the 2 screws. NOTE · Reconnect the connector after replacing the DOOR SWITCH ASSEMBLY.
34
CABINET COVER
1 Unscrew the 5 screws from upper of the cabinet cover. 2 Unscrew the screw from the filter cover.
3 Put a flat ( - ) screwdriver or putty knife into the hinge slots at the bottom of the cover and pry it out.
4 Unscrew the screw from the lower side of the cabinet cover.
35
5 Open the door. 6 Disassemble the clamp assembly.
7 Tilt the cabinet cover. 8 Disconnect the door switch connector.
NOTE : When assembling the cabinet cover, connect the door switch connector.
9 Lift and separate the cabinet cover.
10 Disassemble the clamp assembly. 11 Disassemble the gasket.
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DOOR
1 Open the door. 2 Unscrew the 4 screws from the hinge. (Use the 8mm tool.)
3 Disassemble the door upward.
DOOR LOCK SWITCH ASSEMBLY
1 Open the door and remove the gasket using the special gasket pliers. 2 Unscrew the 2 screws.
NOTE · Reconnect the connector after replacing the door switch assembly.
37
PUMP
1 Disassemble the cabinet cover.
CIRCULATION HOSE PUMP HOSE BELLOWS
2
Separate the pump hose, the bellows, the circulation hose assembly from the pump assembly.
3 Disassemble the pump assembly.
HEATER
1 Disassemble the cabinet cover. 2 Separate 2 connectors from the heater. 3 Loosen the nut and pull out the heater. CAUTION · When assembling the heater, insert the heater into the heater clip on the bottom of the tub. · Tighten the fastening nut so the heater is secure.
THERMISTOR PLUG
1 The thermistor is built into the heater assembly. Follow the instructions for HEATER.
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WHEN FOREIGN OBJECT IS STUCK BETWEEN DRUM AND TUB
1 Disassemble the cabinet cover. 2 Separate the heater from the tub. 3 Remove any foreign objects (wire, coin, etc.) by inserting a long bar in the opening.
LAMP ASSEMBLY
TOP PLATE ASSEMBLY 1 Unscrew 2 screws on the back of the top plate. 2 Pull the top plate backward and upward as shown.
3 Disconnect the connector.
4 Disassemble the lamp assembly.
39
MOTOR/DAMPER
1 Disassemble the back cover. Rotor Bolt 2 Remove the bolt. 3 Pull out the rotor.
1 Unscrew the 2 screws from the tub bracket. 2 Remove the 6 bolts on the stator. 3 Unplug the 2 connectors from the stator.
HINGE, DAMPER
DAMPER
1 Disassemble the damper hinges from the tub and base. NOTE · If you pull the dampers apart, the must be replaced. If you do not separate them, they can be re-used.
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8. EXPLODED VIEW
8-1. CABINET & CONTROL PANEL ASSEMBLY
M410
F215
A485
A175 F210 F110
A455
A450
A110 A111
A410
A102 A103
A104
A105
A106
A180
A181
A152
A150 A154
A156
A101 A141
A151
A153
A390 A131
A100 A430
A130 A140
A133
A440
A300 A310
A201
A220
A303
A200
42
8-2. DRUM & TUB ASSEMBLY EXPLODED VIEW
K350 K143 K123
K361
K360 F140
K610
K411 K115
K611
K410
K141 K110 K111 K140 F310 K571 F315 F465 K572 F463 K570 K320
K513
K117
K142
K190 F464 K516 K122 K125
K511
K130 K530
K510 K512 F360 K340 K135 K344
K121
K131
F365
K346 K349 F464
K347
K345 F145 F468
K520 F461 K540 K105
K550
K342
K348
43
8-3. DISPENSER ASSEMBLY EXPLODED VIEW
F323 F322
F462
F321
Inlet Valve Filter SVC
F300
COLD (BLUE) HOT (ORANGE)
F180
F170 F160
F340
F227
F226
F329
F327
F225 F430 F220 F441
F120
F130
F432
44
8- EXPLODED VIEW
M111
M110
M121 M100 M235 M120 M210 M240 K311 M130 M215 M101 M220
K311
M312 M310
M311 M230
45