Samsung WF455ARGSWR/AA Trouble Shooting Guide, WF455ARGSGR/AA, WF457AR Series, WF455AR Series Technical Information

WASHING MACHINE

Technical Information

Code No. : DC68-03152A_EN

• 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 detai LCD / LED installation, operating, testing, troubleshooting, and disassembly instructions.

Models : WF457AR*

WF455AR*

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

CAUTION

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

WARNING

Model : WF457AR* Model : WF455AR*

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ALIGNMENT AND ADJUSTMENTS

GENERAL ERROR FUNCTION

Error Code

(Diagnostic Code

Error Image)

Description Corrective Action

1 dc

An unbalanced load that prevents your washer from spinning.

Redistribute the load, press the Start/ Pause button.

2 dS

The door is open when the washer is running.

Close the door tightly and restart the cycle. If the code reappears, call customer service.

3 FL

Your washer failed to lock the door.

Make sure the door is rmly closed. Press the Power button to turn o your washer, then turn it on again. If the code reappears, call customer service.

4 Hr

A water temperature control problem. (Heater control problem)

Call customer service.

5 LE

Your washer has tried to ll, but has not reached the proper water level.

Call customer service.

6 LO

The door will not unlock.

Make sure the door is rmly closed. Press the Power button to turn o your washer, then turn it on again. If the code reappears, call customer service.

7 nd

Your washer is not draining. This can also mean that the unit senses a small clog while draining.

1. Turn o the unit for 10 seconds and then turn it on again.

2. Select the Spin Only cycle.

3. Press the Start/Pause to drain the water. If it still does not drain, call for service.

8 nF

Your washer has tried to ll but was unsuccessful.

Make sure the water faucets are open all the way. Check for bent hoses. Check the inlet screens on the hoses. If you are using a Flood Safety Device, please remove the device and connect the water hoses directly to the unit. Check if the hot water supply hose is connected. You must connect the hot water supply hose because hot water is supplied by the Auto Temperature Control (A.T.C.) function if the temperature of the cold water is lower than 59°F.

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

WARNING

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ALIGNMENT AND ADJUSTMENTS

Error Code

(Diagnostic Code

Error Image)

Description Corrective Action

9 nF1

The hot/cold water hose connection is not correct.

Please connect the hot/cold water hose connection correctly.

10 OE

A fault is detected in the water level sensor.

Call customer service.

11 1E

The Water Level sensor is not working properly.

Call customer service.

12 E2

A jammed key. Call customer service.

A temperature sensor problem.

Press the Power button to turn o your washer, then turn it on again. If the code reappears, call customer service.

A motor problem.

Restart the cycle. If the code reappears, call customer service.

High/Low voltage detected.

Restart the cycle. If the code reappears, call customer service.

A Communication error between the SUB(Sensor) PBA and the MAIN PBA

Call customer service.

AE4

A Communication error between the WIFI PBA and the MAIN PBA

Call customer service.

AE3

A Communication error between the DR Module and the MAIN PBA

Call customer service.

AE5

A Communication error between the LCD PBA and the MAIN PBA

Call customer service.

A MEMS sensor problem.

Call customer service.

SF1 SF2 SF3

A system error

Call customer service.

SUdS

Too many suds are detected during the wash session. The unit is put on hold until the amount of suds have been reduced. The unit will then go back to operating. When it nishes washing, the “End” and “SUdS” codes will blink in turn.

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

WARNING

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ALIGNMENT AND ADJUSTMENTS

TEST MODE Model: WF455AR*

Model: WF457AR*

Test Mode:

Each Test Mode for the GRACE S is as follows in the coming pages.

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

WARNING

Special Test Mode

Power O State

Quick Test 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

EEPROM Clear

Mode

Power On State

(Normal User Mode)

Special Test Mode

Power O State

Quick Test Mode

Service 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

Demo Mode Wash

EEPROM Clear

Mode

Power On State

(Normal User Mode)

Special Test Mode

Power O State

Power On State

(Normal User Mode)

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ALIGNMENT AND ADJUSTMENTS

Quick Test Mode Model: WF455AR*

Model: WF457AR*

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: Model : WF455AR*

- Plug in the unit.

- Press Soil Key, Spin Key and Power Key at the same Time.

Model : WF457AR*

- Press Start button and Power button at the same Time for 1 second or less. (factory mode over 1 second pressing)

- If ‘02’ or ‘01’ are displayed, machine entered factory mode. Turn o the machine and try again.

✻Before entering QuickTest Mode, turn on AP.(WiFi AP)

After entering QuickTestMode, WiFi testing is done automatically. If there is “AE4” error check WiFi module in LCD Module.

✻Press the Start button after the AE3 or AE4 error occurs to cancel the error notication and

continue quick test mode.

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

WARNING

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ALIGNMENT AND ADJUSTMENTS

Model : WF455AR*

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 S/W Version is 49, 7-Segment will display Y349)

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

- Steam : Drain Pump / Bubble Pump / Direct Valve Test

Model : WF457AR*

1. Displays software version for a sec and Clear

EEprom. (Ex. If S/W Version is 49, 7-Segment will display Y349)

2. Press the following keys to test the various

components.

- No.1 Key : Water Valves Test

- No.2 Key : Door Lock/Unlock Test

- No.3 Key : Drain Pump / Bubble Pump / Direct Valve Test

- No.4 Key : Water Heater Test

Quick Test Mode:

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

WARNING

Quick Test Mode

S/W Version display

All LEDs On for 1 sec (include 7-Segment)

All Devices Test using keys

Temp Key Soil Key SteamSpin Key

Quick Test Mode

S/W Version display

All Devices Test using keys

1 Key 3 Key 4 Key2 Key

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ALIGNMENT AND ADJUSTMENTS

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.

- If ¨AE3¨ or ¨AE4¨ error occured, press the Start button then error will be cleared.

How to Enter: Model : WF455AR*

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

Model : WF457AR*

- Method 1 : Select Title Option “1” on Course Selection Mode. “ Press Extras for 3 Seconds.

- Method 2 : Tap “3” three times “ Tap “4” two times “ Tap “3” once On the Progress Mode.

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

WARNING

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ALIGNMENT AND ADJUSTMENTS

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. Following Instructions To exit Service Mode.

Model : WF455AR*

- Press Signal and 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.

Model : WF457AR*

- Tap Segment “4 “ three times “ Tap Segment “1” two times “ Tap Segment “4” once On the Service Mode. If no key is operated during Service Mode for 5 minutes, the machine will return to normal user mode.

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

WARNING

WF457AR* Service Mode

WF455AR* Service Mode

Signal + Extra Rinse

3 sec

Service Mode is canceled if no key is pressed for 5 minutes before the washer operation begins. However, this is not true when the washer operation has already started.

Power On State

(Normal User Mode)

Service Mode

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ALIGNMENT AND ADJUSTMENTS

Quick Spin Test Mode

Model : WF455AR*

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 + Rinse Add Keys for 3 seconds to enter Quick Spin Test Mode.

- 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 SPIN Key If you PressSPIN key when the washing machine is not in Hold Speed Mode, Quick Spin Mode is exited and Service Mode is restored.

Model : WF457AR* Denition of Quick Spin Test Mode:

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

How to Enter:

- Press “Spin” On the Service Mode.

- 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 SPIN Key If you Press SPIN key when the washing machine is not in Hold Speed Mode, Quick Spin Mode is exited and Service Mode is restored.

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

WARNING

Delay Start + Rinse Add

for 3sec or after 10 minutes

Delay Start + Rinse Add

3 sec

While a cycle is not running

While it is not in Hold Speed Mode

Service Mode

Start/PauseQuick Spin Test Mode

Hold Speed Mode

Delay Start + Rinse Add

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ALIGNMENT AND ADJUSTMENTS

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: Model : WF455AR*

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

Model : WF457AR*

- Press “2” on The 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 LCD /

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: Model : WF455AR*

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

Model : WF457AR*

- Press “4” On the 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 dE49 at Version 49 (dE 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.

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

WARNING

WF455AR* : Signal

WF457AR* : 2 Key

Service Mode Cycle Count

WF455AR* : Soil Level WF457AR* : 4 Key

Service Mode

S/W Version Check

Mode

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ALIGNMENT AND ADJUSTMENTS

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: Model : WF455AR*

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

Model : WF457AR*

- Press “1” on The 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

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

WARNING

WF455AR* : Temp WF457AR* : 1 Key

Service Mode

Fast Time Down

Test Mode

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ALIGNMENT AND ADJUSTMENTS

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: Model : WF455AR*

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

Model : WF457AR*

- Press “TEST” On the Service Mode.

Board Input Test Mode:

- If the product enters Board Input Test Mode, ‘in’ is displayed.

- The information that is displayed in the Board Input Test is as follows.

1. The Water Temperature in Celsius.

2. The Water Temperature in Fahrenheit.

3. The door status (OP if open, CL if closed).

4. The Door Lock Switch status (UL if unlocked, LO if locked).

5. The Water Level Pulse

- You can change each information using the Cycle Selector(WF455) and arrow(WF457) button.

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

WARNING

WF455AR* : Extra Rinse WF457AR* : TEST Key

Service Mode Board Input Test

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ALIGNMENT AND ADJUSTMENTS

Diagnostic Code Check Mode

Denition of Diagnostic Code Check Mode:

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

How to Enter: Model : WF455AR*

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

Model : WF457AR*

- Press “3” on The Service Mode.

Board Input Test Mode:

1. Activate the Service Mode rst.

2. Press the “Spin key” key to start Error Code Check Mode with Code “d” ashing.

3. To cycle through the error codes, 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 error codes from the latest.

5. When turning it in the opposite direction, it shows the error codes in the reverse order.

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

WARNING

Service Mode

WF455AR* : Spin WF457AR* : 3 Key

Diagnostic Code

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ALIGNMENT AND ADJUSTMENTS

Demo Mode

Model : WF455AR*

- Demo mode is entered when the Delay Start + Soil Level 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 LED’s 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 each RPMs, the No Spin, Low, Medium, High, and Extra High LED’s 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 700 RPM. The Medium LED turns on between 700 RPM and 900 RPM. The High LED turns on between 900 RPM and 1100 RPM. Extra High spin speed LED turn On more than 1100 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 in the initial Demo mode, “LED” blinks on the 7 segment display and the washing machine enters LED mode.

- If the Start/Pause button is pressed in LED mode, all LED’s are turned on. 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.

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

WARNING

Delay Start + Soil Level

5 sec

While a cycle is not running

Power O Key

Normal User Mode

Power O Mode

Demo Mode

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Model : WF457AR*

The Demo Mode of the WF457AR* model is only for Wash Mode.

- Demo mode-Wash Mode is entered when press the ‘9’ button in the Service 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, back to the initial Demo mode-Wash Mode.

- If the Start/Pause button is pressed during a WASH mode operation, back to the initial Demo mode-Wash Mode.

Connecting to a hidden AP (WF457AR*)

Proposed hidden AP specications

- The product can only connect to a hidden AP when it is in Shop Demo Mode.

- After the connection is established, even if the connection is disconnected because the product is unplugged or the AP is turned o, the connection is automatically restored when the product is plugged in again or the AP is turned on.

- AP name: The full name is displayed in the same way as an existing AP.

TROUBLE SHOOTING

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

WARNING

Enter Shop Demo Mode

(Tap 1  2  1  2  1)

The Hidden AP button appears in the

Network menu.

The connection information input screen

appears.

If an encryption method is selected, the

password input box appears.

Tap to move to the AP name input screen.

Tap to move to the password input screen.

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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: Model : WF455AR*

- Plug in the unit.

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

Model : WF457AR*

- Enter Service Mode

- S/W Version Check Mode

- Press the“Reset”key three times repeatedly.

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

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

WARNING

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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, “NO Draining” error will occur after 15 minutes.)

• Check Water Supply.

• Check the line or water valve screen lter.

• Check if PCB connectors are assembled LCD / LED properly.

• Check if CN6 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.

CN8 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. (CN8 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

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

WARNING

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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 CN6 and PIN#1,2,7,8,9 of CN1)

• 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 soi LCD / LED.

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

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 (CN6 & CN1). (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 “The door will not unlock”. Turn o and on the unit. If “The door will not unlock” keeps illuminating, check PCB and Door Lock Switch.

TROUBLE SHOOTING

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

WARNING

(Techsheet)WF457AR-03152A_EN_20120404.indd 18 2012-04-04 �� 12:12:29

TROUBLE DIAGNOSIS

• Read Lock Switch and PCB (CN6 & CN1). (Refer to PCB Connector Check.)

• 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.)

No Key Operation

• Option and Function buttons respond dierently according to each cycle.

• Child Lock is being activated. To exit, hold down Soil Level Key and Signal Key simultaneously until it sends out a beeping sound.

• When “End“ illuminates on the display, only Power button works. Press Power button and make new cycle selections.

Will Not Drain

• Check for any kink on the drain hose. If any, straight it out.

• Check for any restriction in the drain hose.

• Close the door and press the Start/Pause Button. For safety reasons, the washer does not tumble or spin with the door open.

• When it is freezing outside, check if it is frozen inside the drain hose.

• Check if the water level signal input is correct. Go to Board Input Test Mode.

• Go to Quick Test Mode and do Drain Pump Test.

• Check if there is any twist in the hose (the one between Tub and Drain Pump).

• Check if it reads AC 120V at the pump when a spin cycle is selected.

• Read the winding resistance of the pump motor. (14.2±7% Ohms)

• Check the pump at CN1(PIN3) on PCB. It should read AC 110~120V. (Refer to PCB Connector Check)

Wrong Water Temperature

• Check if both of the water taps are fully open.

• Make sure the domestic water heater is set to deliver water lower than 120°F (49°C) hot water at the tap. Also check water heater capacity and recovery rate.

• If the water heater is located far from the washer, screw out the hot water tap and let its water pass until you get hot water.

• Too Hot/Too Cold: Reduced amount of water is supplied while PCB controls the inux to regulate the actual temperature of the water in the tub. This may appear to be signicantly hotter/colder than expected.

• Check if the temperature selection is correct.

• Disconnect inlet hoses from the Water Valve and remove any residue in the inlet screens.

Noisy and/or Vibration/Walking

• Check if the washer is leve LCD / LED and the lock nuts are tightened up on the bottom plate.

• Check if all of the shipping bolts and spacers are removed from the back panel.

•

Check if load is big enough and there is no unbalance.If there is not enough load, put in a few towels to balance it.

• Check if the motor is fastened enough.

• Remove various trouble contributors (such as dust coat on the oor).

Rubber Feet Leaving Marks on Floor

• Use a pencil eraser to remove mark.

• Walk washer into location, do not drag.

Additive Cups Full of Water

• Small amount of water in bottom of additive cups is normal.

• Remove and wash Dispenser Tray, removable Cup, and Rinse Cap.

• Level washer.

Buttons do not Respond

• Option and Function buttons respond dierently according to each cycle.

• Child Lock feature has been selected. To disable feature press and hold Temp and Spin simultaneously until a beep is heard.

• When display shows “End”, only the Power button will function. Press Power and make new cycle selections.

TROUBLE SHOOTING

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

WARNING

(Techsheet)WF457AR-03152A_EN_20120404.indd 19 2012-04-04 �� 12:12:29

Hall Sensor Check

Check Voltage at Pin #4 and #2 of CN3 Tester Check = DC 0V or 1.3V Check Voltage at Pin #4 and #3 of CN3 Tester Check = DC 0V or 1.3V

Motor Check

Resistance at Pin #1 and #2 of CN11 = 12Ω Resistance at Pin #1 and #3 of CN11 = 12Ω Resistance at Pin #2 and #3 of CN11 = 12Ω

Door Lock Check

Check Voltage at Pin #1 of CN6 and Pin #2 of RY5 When Door Lock = AC 120V

Drain Motor Check

Check Voltage at Pin #5 of CN6 and Pin #2 of RY5 When Drain Motor operates = AC 120V

CIRCLE Motor Check

Check Voltage at Pin #4 of CN6 and Pin #2 of RY5 When Circulation Motor operates = AC 120V

Water Valve Check

Check Voltage at Pin #2,6,7,8,9,10 of CN6 and Pin #2 of RY5 When each valve operates = AC 120V

AC Power Check

Check Voltage at Pin #1 of CN5 and #2 of POWER RELAY Tester Check = AC 120V

Wash Heater Relay Check

Check Voltage at Pin #2 of RY6 and PIN #2 of RY5 When Heater Relay operates = AC 120V

PROBLEM CHECKING AND METHOD OF PCB (Model: WF457AR*)

- If you plug in the power cord and turn Power S/W on, memorized data is displayed. If any data is not displayed, check the followings.

Thermistor Check

Check Voltage at Pin #8 and #9 of CN7 Tester Check = DC 1.6V If it ready 5V, check if its connector is engaged properly.

Water Sensor Check

Check Voltage and Frequency at Pin #10 and #9 of CN7 Reset water level = DC1.6V, 26.0KHz Check Voltage and Frequency at Pin #11 and #9 of CN7 Reset water level = DC1.6V, 26.0KHz

TROUBLE SHOOTING

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

WARNING

CN5 £ ¥

CN11

£ ¥

RY5

RY6 £ ¤

CN6

¨ §

¬ £

CN3 ¦ £

¬ £ CN7

CN1 ª £

(Techsheet)WF457AR-03152A_EN_20120404.indd 20 2012-04-04 �� 12:12:31

Hall Sensor Check

Check Voltage at Pin #4 and #2 of CN3 Tester Check = DC 0V or 1.3V Check Voltage at Pin #4 and #3 of CN3 Tester Check = DC 0V or 1.3V

Motor Check

Resistance at Pin #1 and #2 of CN11 = 12Ω Resistance at Pin #1 and #3 of CN11 = 12Ω Resistance at Pin #2 and #3 of CN11 = 12Ω

Door Lock Check

Check Voltage at Pin #1 of CN6 and Pin #2 of RY5 When Door Lock = AC 120V

Drain Motor Check

Check Voltage at Pin #5 of CN6 and Pin #2 of RY5 When Drain Motor operates = AC 120V

CIRCLE Motor Check

Check Voltage at Pin #4 of CN6 and Pin #2 of RY5 When Circulation Motor operates = AC 120V

Water Valve Check

Check Voltage at Pin #2,6,7,8,9,10 of CN6 and Pin #2 of RY5 When each valve operates = AC 120V

AC Power Check

Check Voltage at Pin #1 of CN5 and #2 of POWER RELAY Tester Check = AC 120V

Wash Heater Relay Check

Check Voltage at Pin #2 of RY6 and PIN #2 of RY5 When Heater Relay operates = AC 120V

PROBLEM CHECKING AND METHOD OF PCB (Model: WF455AR*)

- If you plug in the power cord and turn Power S/W on, memorized data is displayed. If any data is not displayed, check the followings.

Thermistor Check

Check Voltage at Pin #3 and #4 of CN6 Tester Check = DC 1.6V If it ready 5V, check if its connector is engaged properly.

Water Sensor Check

Check Voltage and Frequency at Pin #5 and #4 of CN6 Reset water level = DC1.6V, 26.0KHz Check Voltage and Frequency at Pin #6 and #4 of CN6 Reset water level = DC1.6V, 26.0KHz

TROUBLE SHOOTING

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

WARNING

CN5 £ ¥

RY6 £ ¤

CN6

¨ §

¬ £

CN3 ¦ £

¬ £ CN7

CN1 ª £

CN11

£ ¥

RY5

CN6 £ ¨

(Techsheet)WF457AR-03152A_EN_20120404.indd 21 2012-04-04 �� 12:12:32

Model: WF457AR*

TROUBLE SHOOTING

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

WARNING

(Techsheet)WF457AR-03152A_EN_20120404.indd 22 2012-04-04 �� 12:12:32

Model: WF455AR*

WIRING DIAGRAM

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

WARNING

(Techsheet)WF457AR-03152A_EN_20120404.indd 23 2012-04-04 �� 12:12:32

WIRING DIAGRAM

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

WARNING

(Techsheet)WF457AR-03152A_EN_20120404.indd 24 2012-04-04 �� 12:12:32

MEMO

(Techsheet)WF457AR-03152A_EN_20120404.indd 25 2012-04-04 �� 12:12:32

MEMO

(Techsheet)WF457AR-03152A_EN_20120404.indd 26 2012-04-04 �� 12:12:32

+ 58 hidden pages

Samsung WF455ARGSWR/AA Trouble Shooting Guide, WF455ARGSGR/AA, WF457AR Series, WF455AR Series Technical Information

Specifications and Main Features

Frequently Asked Questions

User Manual