Samsung WF431ABP, WF431ABW Trouble Shooting Guide

WASHING MACHINE

Technical Information

• Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or repair of this unit.

• Refer to Service Manual for detailed installation, operating, testing, troubleshooting, and disassembly instructions.

CAUTION

All safety information must be followed as provided in Service Manual.

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Code No. : DC68-03015A-02_EN

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

GENERAL ERROR FUNCTION

Error Code

(WF461)

1 nd 1

Diagnostic Code

Error Image

(WF431)

Description Corrective Action

The water level fails to drop below the Reset Water Level within 15 minutes.

Go to “ Will Not Drain” Troubleshooting Section.

2 LO 2

3 nF 3

4 FL 4

5 LE 8

6 LE(1E) 8

7 OE E

8 dc 10

9 E2 15

Door fails to Unlock After 7 attempts.

When the lling Continues for more than 40 minutes or there is no change of water level for 6 minutes.

Door fails to lock after 7 attempts.

A water level lower than the Reset water level (25.6Khz) is detected for 5 seconds during the Wash/Rinse cycle.

Water Level Sensor Trouble. (When the input signal from the water level sensor is out of range, the unit will send out beeping sounds and halts the cycle.)

A fault is detected in the water level sensor. Data (frequency) shows the water level is at or above the overow water level. (When this condition is detected, the machine will automatically starts draining water until the water level falls below the overow water level)

Unbalance or cabinet bump is detected during nal spin, which prevents the drum from spinning over 150 rpm. (Never exceeds 150 RPM due to unbalanced load)

Jammed Key.(When key input signals are coming out for more than 30 seconds, it is regarded as a jam.)

Go to “ Will Not Unlock” Troubleshooting Section.

Go to “ No Water Fill” Troubleshooting Section.

Go to “ Will Not Lock” Troubleshooting Section.

Go to “No Water Fill” Troubleshooting Section.

Go to “No Water Fill” Troubleshooting Section

First check to see that all of water valves are not stuck. If water valves are OK, check water level sensor.

Go to “Wet Clothes” Troubleshooting Section.

Check all of keys. If A key is sensed to be pressed, all keys will do not respond.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Error Code

(WF461)

Diagnostic Code

Error Image

(WF431)

10 dL 18

11 ds 22

3E 2E

Sr 34

Hr 36

nF1 5

17 suds -

18 AE

19 AE3

20 SF

Description Corrective Action

Door is detected as open when the motor is operating.

Door is detected as open while it is trying to lock the door.

Abnormal high/low temperature or resistance (Thermal sensor or PBA resistance).

MICOM is attempting to drive the motor but is not getting any response signals from the hall sensor. Visual check shows motor is not running. (Locked, Defective Hall Sensor or Overload)

System Relay (Main Relay) Failure. (PCB does not notice the relay operation when there should be.)

Heater Relay Failure (No Heater Relay Check Signal)

The hot/cold water hose connection is not correct.

Suds is detected during the washing session. (“SUdS” is not an error. If the washer is in suds period, “SUdS” will light up instead of remaining time.)

Communication error between SUB PBA and MAIN PBA This is displayed when an error occurs while communicating with the DR ready modem.

System Error Replace PCB

Check for loose wire connections. Go to “Quick Test Mode” and then do Door lock/Unlock Test and Motor Test.

Go to “Quick Test Mode” and then do Door Lock/Unlock Test

Go to “ Board Input Test” and check Water Temperature. Check loose or pinched wires. Replace PCB or thermistor.

Evaluate wire harness for loose or unhooked connections. Go to “ Quick Test Mode” and test Motor.

Replace PCB.

Replace PCB

Please connect the hot/cold water hose connection correctly.

Guide a user to reduce amount of detergent usage.

Check Main PBA, SUB PBA & Wireharness. Replace PCB

Contact customer service.

21 2E

Voltage for motor control bus is over or under specied limit.

Replace PCB

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

TEST MODE

Power Off State

Special Test Mode

Power On State

(Normal User Mode)

Quick Test Mode

[WF431AB*]

Quick Test Mode

EEPROM Clear

Mode

Continuous Cycle

Mode

Service Mode

Demo Mode

Quick Spin Test Mode

Cycle Count Check Mode

S/W Version Check Mode

Fast Time Down Test Mode

Board Input Test Mode

Diagnostic Code

CheckMode

Test Mode:

Each Test Mode for the Yukon is as follows in the coming pages. The test modes indicated by the red arrows are modes unable to get an access once the washing cycle has started due to safety resons.

[WF461AB*]

[WF461AS*]

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Denition of Quick Test Mode:

- Check operation of all LED’s (Verify faulty LED).

- Check model and software version.

- Check dierent operating modes (e.g. water valve, motor, door, drain pump, etc.).

How to Enter:

- Plug in the unit.

- Press Soil Level Key + Signal Key and Power Key at the same Time.

Important. Once test mode is performed, all data including the diagnostic code saved in the

EEPROM will be erased.

Quick Test Mode:

1. All LED’s light up and it sends out Beep Sound when it

enters into the Quick Test Mode. (Including 7-Segment)

2. Displays software version for a sec and Clear EEprom. (Ex. If

Machine Version is L9 and S/W Version is 49, 7-Segment will display L949)

3. When the version is displayed, turn the Jog-Dial so that

the version disappears. Press the following keys to test the various components.

- Temp Key : Water Valve Test

- Spin Key : Door Lock/Unlock Test

- Soil Key : Water Heater Test(WF431) Water Heater/Dry Heater Test(WF461)

- Signal Key : Drain/Bubble Pump Test

- My Cycle Key : Fan Motor Test

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

EEPROM Clear Check

Denition of EEPROM Clear Mode:

- EEPROM initialization.

- All course/option settings are to be reset to default values after EEPROM initialization.

- When Service arises and it needs PCB replacement, EEPROM should be reset.

How to Enter:

- The machine must be turned o.

Press Delay Start Key, Power Key at the same time.

Continuous Run Mode

Denition of Continuous Run Mode:

- Will continuously repeat the current cycle until the Continuous Run Mode is cancelled.

How to Enter:

- Press DelayStart + ExtraRinse together for 3 sec.

Continuous Run Mode:

1. Press

3. The Continuous Run Mode will repeat the previous cycle until continuous run mode is cancelled.

5. If power is lost in Continuous Run Mode (that is, when the power plug is disconnected or the

DelayStart + ExtraRinse 3 sec

Once in Continuous Run Mode, The seven segments will no longer display “0000” and will alternate between displaying the number of cycles of the completed course and the remaining time of the course.

During Continuous Run Mode, press DelayStart + ExtraRinse 3 seconds to return to normal user mode. The seven segments will no longer display the number of cycles and will display the maintenance time only.

Power key is pressed turning the washing machine o), the mode is released when the washing machine is turned on again.

during Power On State (Normal User Mode) .

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Service Mode

Denition of Service Mode:

- Service Mode enables service technicians to verify the operation of the washing machine and do troubleshooting.

- Service Mode can be entered during all washing cycle without interrupting the cycle except some of test modes.

- Various tests can be done with Service Mode. So, troubleshooting can be done based on the resulting diagnostic codes.

How to Enter:

- To enter the Service Mode, press the Signal + Extra Rinse Keys for 3 seconds or until the unit sends out beeping sounds.

Service Mode:

1. The washer must be on to go into the Service Mode.

2. The motor speed will be displayed when started (It displays 0 when the motor does not spin).

3. The present state of the machine will not be changed.

(i.e., the current cycle in progress will not be interrupted and only the display will change)

4. To exit Service Mode, press Signal + Extra Rinse Keys for 3 second again, or Power Key.If no key is operated during Service Mode for 5 minutes, the machine will return to normal user mode.

5. You can use the DR Ready Modem Wire Test function in the service mode.

- After entering Service Mode, press the Pure Cycle button to start the Wire Test.

- During the test, “----” is displayed.

- If the test result is normal after the test, “SG” is displayed.

- If a problem occurs, the “AE3” error code is displayed.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Quick Spin Test Mode

Denition of Quick Spin Test Mode:

- Quick Spin Test Mode is to do Spin Check. (High RPM)

How to Enter:

- During Service Mode, press the Delay Start + ExtraRinse Keys for 3 seconds to enter Quick Spin Test Mode. (Same for all Frontier 2 models.)

- Cannot enter once the washing cycle has started.

Quick Spin Test Mode:

As it enters into the Quick Spin Test Mode, it starts spinning and reaches to its maximum RPM. Once the Spin speed reaches the maximum RPM, the speed drops immediately. To hold Quick Spin Test Mode (entering Hold Speed Mode), press the Start/Pause button. If the

Start/Pause button is pressed during Quick Spin Test Mode, it will stop accelerating and hold its spinning speed for 10 minutes before going back to Quick Spin Test Mode.

Also, to cancel the hold and allow Quick Spin Test Mode to continue, press the Delay Start + ExtraRinse Keys together for 3 seconds.

If you hold down the Delay Start + ExtraRinse keys for three (3) seconds when the washing machine is not in Hold Speed Mode, Quick Spin Mode is exited and Service Mode is restored.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Cycle Count Check Mode

Denition of Cycle Count Check Mode:

- Cycle Count Check Mode is to tally up the number of washings.

How to Enter:

- To enter the Cycle Count Check Mode, press the Signal Key during Service Mode.

Cycle Count Check Mode:

1. Activate the Service Mode in advance.

2. When the Signal key is pressed, the total number of washings will light up and a signal LED will

glow.

3. The maximum number of cycles will be 9999. The counter will roll over to 0 and start counting again after 9999.

4. The counting will be carried out at the end of the normal cycle. (For normal and Continuous Run cycles, the count is carried out at the end of the cycles.

5. To exit the Cycle Count Check Mode, press the “Signal” key again.

S/W Version Check Mode

Denition of S/W Version Check Mode:

- S/W Version Check Mode is to bring up S/W Version information.

How to Enter:

- To enter the S/W Version Check Mode, press the Soil Level Key during Service Mode.

S/W Version Check Mode:

1. Activate the Service Mode in advance.

2. Press the Soil Level Key to bring up its software Version

EX) Generate AE49 at Version 49 (AE is Micom code, 49 is it’s software version)

3. To exit the S/W Version Check Mode, press the Soil Level S/W once again. Then, it returns to the Service Mode with motor RPM illuminating.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Fast Time Down Test Mode

Denition of Fast Time Down Test Mode:

- Fast Time Down Test Mode is to forward the program to the next cycle stage.

How to Enter:

- To enter the Fast Time Down Test Mode, press the Temp key during Service Mode.

Fast Time Down Test Mode:

1. Activate the Service Mode in advance.

2. To forward the program to the next cycle stage, press the Temp key.

Each stage is located at key points of a complete cycle as follows:

- End of Each Fill (Beginning of Wash or Rinse Tumble Session) Caution: Check if the current water level is higher than the Reset water level and then perform the Fast time down test.

- Beginning of Drain Session

- Beginning of Spin Session (Here, it checks the water level. So, if it is over the reset level, it carries out draining before the spinning.)

- Beginning of Fill Session

- Beginning of Bleach Fill

- Beginning of Fabric Softener Fill

- Every 3 minutes during Wash and Rinse Tumble Session

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Board Input Test Mode

Denition of Board Input Test Mode:

- Board Input Test Mode is to displays a specied input after a key press.

How to Enter:

- To enter the Board Input Test Mode, press the Extra Rinse Key during Service Mode.

Board Input Test Mode:

1. Activate the Service Mode rst.

2. Press the Extra Rinse Key to start Board Input Test.

3. Turn the Jog-Dial so that the Normal Course LED is turned on. The Water Temperature will be

displayed in Celsius.

4. Turn the Jog-Dial so that the HeavyDuty Course LED is turned on. The Water Temperature will be displayed in Fahrenheit.

5. Turn the Jog-Dial so that the Perpress Course LED is turned on. The door status will be displayed (OP if open, CL if closed).

6. Turn the Jog-Dial so that the Sanitize Course LED is turned on. The Door Lock Switch status will be displayed (UL if unlocked, LO if locked).

7. Turn the Jog-Dial so that the Bedding Plus Course LED is turned on. The Water Frequency will be displayed.

8. Turn the Jog-Dial so that the Night Wash Course LED is turned on. The SilverCare Status will be displayed.(defualt : “--”)

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Diagnostic Code Check Mode

Service Mode

Spin

Diagnostic Code

Signal

Start/Pause

Pressing

Cycle No.

Before making Code

Cycle Count

Denition of Diagnostic Code Check Mode:

- Diagnostic Code Check Mode is to bring up the stored diagnostic codes (refere nce codes for service technicians).

How to Enter:

- To enter the Diagnostic Code Check Mode with code “d” ashing, press the Spin Key during Service Mode.

Diagnostic Code Check Mode :

1. Activate the Service Mode rst.

2. Press the “Spin Key” key to start Diagnostic Code Check Mode with Code “d” ashing.

3. To cycle through the diagnostic codes (d1,d2,d3~d9), turn the Rotary Cycle Selector in one

direction (either Clockwise or Counterclockwise).

4. Now, when turning the Rotary Selector Key in the same direction, it shows diagnostic codes from the latest (d1).

5. When turning it in the opposite direction, it shows the diagnostic codes in the reverse order. Ex) When it stops at d5 and turns backward, it shows from d4 down to “d”. Refer to Diagnostic Code.

ALIGNMENT AND ADJUSTMENTS

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

Demo Mode

- Demo mode is entered when the Steam + Signal + PureCycle buttons are held down for ve (5) seconds simultaneously in the power on state.

- When entering Demo mode, the buzzer rings three (3) times and “- - - -” is displayed on the 7 segment display and all other LEDs are turned o. (Initial Demo mode)

- Demo mode consists of WASH, SPIN and LED modes.

- If the Temp button is pressed during the initial Demo mode, “WASH” blinks on the 7 segment display and the washing machine enters WASH mode.

- If the Start/Pause button is pressed in WASH mode, the door is locked (Door Lock) and the motor rotates left and right at 45 RPM in a 7 sec on and 3-sec o cycle.

- WASH mode continues up to ve (5) minutes once started. After the ve (5) minutes have elapsed, “- - - -” is displayed on the 7 segment display and the initial Demo mode is maintained.

- If the Start/Pause button is pressed during a WASH mode operation, “- - - -” is displayed on the 7 segment display and the initial Demo mode is maintained.

- If the Spin button is pressed in the initial Demo mode, “Spin” blinks on the 7 segment display and the washing machine enters SPIN mode.

- If the Start/Pause button is pressed in the SPIN mode, the door is locked (Door Lock) and a spin is operated at 1150 RPM. When the speed reaches 0 RPM, the No Spin, Low, Medium, High, and Extra High LEDs are turned on.

- During a spin operation, the No Spin LED turns on when the speed is lower than 400 RPM. The Low LED turns on between 400 RPM and 800 RPM. The Medium LED turns on between 800 RPM and 1000 RPM. The High LED turns on at higher than 1000 RPM.

- SPIN mode continues up to four (4) minutes once started. After the four (4) minutes have elapsed, “- - - -” is displayed on the 7 segment display and the initial Demo mode is maintained.

- If the Start/Pause button is pressed during a SPIN mode operation, “- - - -” is displayed on the 7 segment display and the initial Demo mode is maintained.

- If the Soil Level button is pressed during the initial Demo mode, “LED” is displayed on the 7 segment display and the washing machine enters LED mode.

- If the Start/Pause button is pressed in LED mode, all LEDs are turned on. The LED mode continues up to thirty (30) seconds once started. After the thirty (30) seconds have elapsed, “- - -

-” is displayed on the 7 segment display and the initial Demo mode is entered.

- If the Start/Pause button is pressed during an LED mode operation, “- - - -” is displayed on the 7 segment display and the initial Demo mode is entered.

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

TROUBLE DIAGNOSIS

- As the micom wash machine is congured of the complicate structure, there might be the service call. Below information is prepared for exact trouble diagnosis and suitable repair guide.

Caution for the Repair and Replacement

Please follow below instruction for the trouble diagnosis and parts replacement.

1) As some electronic components are damaged by the charged static electricity from the resin part of machine or the human body, prepare the human body earth or remove the potential dierence of the human body and machine by contacting the power supply plug when the work contacting to PCB is executed.

2) Since AC120V is applied to the triac T1 and T2 on P.C.B, the electric shock may occur by touching and be careful that the strong and weak electricity are mixed.

3) As the P.C.B assembly is designed for no trouble, do not replace the P.C.B assembly by the wrong diagnosis and follow the procedure of the trouble diagnosis when the micom is not operated normally.

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

TROUBLE DIAGNOSIS

Will Not Start

• Plug the unit into the wall outlet. Check for proper voltage.

• Check fuse or reset circuit breaker.

• Push any key to turn on the washer and press the Start/Pause key to run the washer.

• Close door and push the Start/Pause key to run the washer.

• Check if washer is in a pause, soak or suds process. Wait briey and it may start. (If the washer is in suds

period, Suds will light up instead of remaining time.)

• Check for restricted drain system. (If there is electrical problem in drain system, “nd” error will occur after 15

minutes.)

• Check Water Supply.

• Check the line or water valve screen lter.

• Check if PCB connectors are assembled properly.

• Check if CN2 terminals on PCB are in good condition. (Refer to PCB Connector Check.)

• Replace PCB.

Leaking

• Make sure inlet hose connections are not leaking. Check for rubber gasket damage due to over tightening.

• Check standpipe for leak. Wrap a dry rag around the standpipe opening.

If rag becomes wet, leak is fault of home plumbing. Be sure the standpipe is capable of accepting the ow of water from the washer.

• Make sure end of drain hose is correctly inserted and secured to drain standpipe.

• Check internal hose connections (ll, drain systems, dispenser hoses & clamps).

• Check rubber boot. Remove, reposition and reinstall, if necessary.

• Check for possible kinked dispenser to outer tub hose. Hot water pressurization may force door open.

No Tumble

• Start normal cycle with an empty machine and allow a ll to check tumble.

• Perform Quick Spin Test. (Before test, make sure that the tumbler is empty.)

• Check for loose connections at Machine Control Board, Pressure Switch, Motor, Tach Harness and Motor

Control. (Refer to the component testing procedure)

• Check motor windings resistance.

CN5 pins 1 & 3 = 11.6ohms ±7%, Pins 1 & 2 = 11.6ohms ±7%, Pins 2 & 3 = 11.6 ohms ±7%

• Faulty Main Control Board.

• Faulty motor.

Will Not Spin

• Make sure to close the door completely.

• Check for water left inside the washer. If so, go to “Will Not Drain”.

• Perform Quick Test Mode or Quick Spin Test. Does the washer spin? (Before the test, empty the unit inside.)

If it doesn’t tumble after the above, change PCB. When the problem persists, change the motor.

• Perform Quick Test Mode or Quick Spin Test. Does the washer spin? If it does, Check Possible unbalanced

load scenario in normal mode.

• Check for loose connections at PCB, Water Level Sensor, Motor, Hall Sensor Wire Harness. (CN7,CN5,CN6)

(Refer to the Component Testing Procedure.)

• Check motor windings resistance. (CN5 Pin1&3 = 11.6 ohms (at ±7% 20°C/68°F),

Pin1&2 = 11.6ohms (at ±7% 20°C), Pin2&3 = 11.6 ohms (at ±7% 20°C))

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

TROUBLE DIAGNOSIS

No Water Fill

• Perform Quick Test Mode. Check all of Water Valves visually.

(Pre Wash Valve, Cold Water Valve, Bleach Water Valve, Softener dispenses using Cold & Bleach Water Valve, and Hot Water Valve.)

• Check if water taps are turned on fully.

• Check Water Valves and Water Level Sensor (Refer to PCB Connector Check)

• Check if there is any kink in inlet hoses.

• Check if inlet screens are clogged up.

• Check if water has enough pressure. If so, nd out its contributors.

• Check if there is any frozen area in the unit (Drain Hose, etc)

• Measure the resistance of Water Valve Coil.

(It should read 1.18K ohms. Check Pin#1 of CN2 and PIN#1,2,7,8,9 of CN3)

• Check Pressure S/W and PCB for loose connections. (Refer to PCB Connector Check.)

Tub Full of Suds

• Go to “Will Not Drain” and “Will Not Spin” and check the draining.

• Check PCB and Drain Pump for any loose wire connection.

• Perform Quick Test Mode or Board Output Test to drain.

• Use HE (High-Eciency) or low sudsing detergent specially formulated for front load washers.

• Reduce the amount of detergent for that specic load size and soil level. Keep in mind that towel creates

more suds generally.

• Reduce the amount of detergent when water is soft, or laundry is small or lightly soiled.

• Do one more washing cycle with cold water and a table spoon of salt without detergent.

TROUBLE SHOOTING

WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless testing requires power.

TROUBLE DIAGNOSIS

Wet Clothes

• Unbalance due to not enough load. Put additional load.

•

Due to excessive suds by using general detergent. Use HE (High-Eciency) or reduce its quantity.

• Low Spin Speed or Drain Only was selected.

• Go to “ Will Not Spin”.

Will Not Lock

• Door is not aligned or closed properly.

• Perform Quick Test Mode. Check Door Lock.

Check the output voltage of Door Lock Coil. If it reads 120V, change Door Lock Switch, and if not, change PCB. (Refer to PCB Connector Check.)

• Read Lock Switch and PCB (CN3). (Refer to PCB Connector Check.)

• Try Door Lock and check for 120V to Door Lock Connector. If 120V present, change Main Control Board and

if not, change Door Lock switch.

Will Not Unlock

• Check if the door is being pushed out, which may keep it from unlocking.

• Door locks itself when the water level is too high. Opening door will result in water draining from door

opening.

• Check the following with Board Input Test Mode.

Water Level (frequency): Over 23.80 KHz.  If so, refer to “Will Not Drain”. Temperature (Inside Drum): Higher than 60ºC/140ºF.  If so, wait until it drops. When everything is normal, check PCB connectors and Door Lock Switch.

• Drain manually after removing the plastic drain hose holder.

• Display shows “LO”. Turn o and on the unit. If “LO” keeps illuminating, check PCB and Door Lock Switch.

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