1. Error code – Ub. Meaning – Unbalanced load prevents washer from spinning. Action – Redistribute the load, and then press the Start/Pause button.
2. Error code – dC/dC1. Meaning – The washer did not properly lock the door. Action – Make sure the door is firmly closed. Restart the washer. If the code reappears, call customer service.
3. Error code – 5C. Meaning – The washer does not drain. The washer may detect a small clog while draining. Action – 1.Restart the washer. 2.Select the Spin Only cycle. 3.Press the Start/Pause button to drain the water. If the washer still does not drain, call customer service.
4. Error code – 4C. Meaning – Water is not being supplied to the washer. Action – Make sure the water taps are open. Make sure the water hoses are not clogged. Make sure the water taps are not frozen. Make sure the washing machine is operating with sufficient water pressure. Make sure that the cold water tap and the hot water tap are properly connected. Clean the mesh filter as it may be clogged.
5. Error code – 4C2. Meaning – The hot water was supplied from the course washing the delicacy clothes. Action – Make sure the cold water supply hose is firmly connected to the cold water tap. If it is connected to the hot water tap, the laundry may be deformed with some cycles.
6. Error code – tC. Meaning – Temperature sensor problem. Action – Restart the washer. If the code reappears, call customer service.
7. Error code – 3C. Meaning – Motor problem. Action – Restart the washer. If the code reappears, call customer service.
8. Error code – 9C1/9C2. Meaning – High/low voltage detected. Action – Restart the washer. If the code reappears, call customer service.
9. Error code – HC. Meaning – Water temperature control problem. (Heater control). Action – Call customer service.
10. Error code – LC. Meaning – Water level problem. Action – Call customer service.
11. Error code – OC. Meaning – Water level sensor problem. Action – Call customer service.
12. Error code – 1C. Meaning – The Water Level sensor is not working properly. Action – Call customer service.
19. Error code – Ur. Meaning – Additional rinsing. • Show additional rinsing in sensing unbalance. • Method of releasing the display. Action – Any key input.
TEST MODES
1. Mode – Standby. How to enter. Set the scheduled time to 17:00 -> Press Start/Pause for 7 seconds -> Smart Install
2. Mode – Smart Install. How to enter. Press Start/Pause While displaying “AS”
3. Mode – Enter Smart Install. How to enter. Press Delay End While displaying “AS” delay end, Check devices in turm when pressing delay end.
4. Mode – Enter Smart Install. How to enter. Press the first button on the left at the bottom While displaying “AS”
5. Mode – Enter Smart Install. How to enter. Press the first button on the right at the bottom while displaying “AS”, “Cr”. Turn jog dial along the direction of CW when displaying. For models that do not feature the jog dial, press the 3rd button from the bottom left to display the information codes one by one with the latest first.
Automatic Mode of Smart Install
Automatically start all operation modes of Smart Install.
Manual Mode of Smart Install
Under the condition of manual mode, every time when "Delay End" is pressed, next step will be entered.
Contents like washings, etc. are not allowed in the drum.
Operation mode 1. Description – carry out test for machine door lockinq.
Operation mode 2. Description – carry out test for drainaqe pump operation.
Operation mode 3. Description – carry out test for operation of preparatory valve.
Operation mode Co. Description – carry out test for operation of cold water valve.
Operation mode Ho. Description – carry out test for operation of hot water valve.
Operation mode 6. Description – carry out test for operation of water shot valve,
carry out test for operation of washing heater, carry out test for operation of rinsing.
Operation mode 7. Description – carry out test for operation of drainaqe pump.
Operation mode 8. Description – carry out test for operation of dehydration.
Operation mode 9. Description – carry out test for operation of drying heater and drying fan.
Operation mode 10. Description – carry out test for opening of machine door.
Operation mode OK(Ot). Description – Automatic mode of Smart Install is completed normally.
* Accessories not included in the product are not required to check and they can be skipped directly.
Identity of Smart Install completion
After Smart Install is completed normally, "OK(Ot)" identity will display.
If Smart Install is completed abnormally or Smart Install fails to work, "nG" identity will display.
Result Enquiry of Automatic Mode of Smart Install
Under the condition of appearance of "AS" identity, press "Delay End + Start/Pause" button.
If automatic mode result is in normal condition, "OK(Ot)" identity will display. If automatic checking mode fails to complete normally or fails to execute, "nG" identity will appear.
Diagnosis Information Display Mode
Under the condition of appearance of "AS" identity, if the first button on the right at the bottom is pressed, "CR" identity will appear and diagnosis information display mode is entered.
Under the condition of appearance of "CR" identity , if turn the jog dial control switch clockwise, diagnosis codes generated before will display 7 digits at most.
TROUBLESHOOTING
Trouble diagnosis
Because the micom for a washer is a complicated structure, a service call may be required.
Below is information for exact trouble diagnosis and proper repair guidelines. Cautions for repair and replacement
Please follow the below instructions for trouble diagnosis and parts replacement.
Because some electronic components are damaged by the charged static electricity from the resin from a machine or the human body, prepare the human body by grounding it to the earth, or remove the potential difference of the human body and machine by contacting the power supply plug when contacting the PCB.
Because AC 120 V is applied to the triac T1 and T2 on the PCB, electrical shock may occur by contacting. Take caution that the strong and weak electricity are not mixed.
Do not replace the PCB assembly unless it’s found defective by a strict diagnosis. Follow the trouble diagnosis procedure if the micom is not operating normally.
Does not start
Plug the washer into the wall outlet. Check for proper voltage.
Check the fuse or reset the circuit breaker.
Close the door and press the Start/Pause button to start the washer.
Check for a restricted drain system. (If there is an electrical problem with the drain system, "NO DRAINING" error will occur after 15 minutes.)
Check the water supply and the line, or water valve screen filter.
Check if the PCB connectors (especially CN6) are connected to the LCD/LED module properly.
Replace the PCB if an error is detected.
Leaks
Make sure the inlet hose and drain hose connections are not leaking. Check for rubber gasket damage due to over tightening.
Check the standpipes for leaks. Wrap a dry rag around the standpipe opening. If the rag becomes wet, the leak is due to home plumbing.
Make sure the standpipe is capable of accepting the water flow from the washer.
Check the rubber boot. Remove, reposition, and reinstall if necessary.
Check for kinks in the dispenser hose to the outer tub. Hot water pressurization may force the door open.
Does not tumble
Start an empty, normal cycle and allow it to fill to check if the washer tumbles.
Perform a Quick Spin Test. Before testing, make sure the tumbler is empty.
Check for loose connections at the machine control board, pressure switch, motor, tach harness, and motor control. (Refer to the component testing procedures.)
Check for remaining water in the washer. If there is remaining water, see "Does not drain".
Perform Quick Spin Test. (Make sure the washer is empty.) If it does not tumble after performing the test, replace the PCB. If the problem persists, replace the motor.
If the washer spins, check for a possible unbalanced load scenario in normal mode.
Check for loose connections at the PCB, water level sensor, motor, and hall sensor wire harness. (CN7, CN5, CN6) Refer to the component testing procedures.
Perform Quick Test Mode. Visually check all the water valves. (Cold/Hot Water Valve)
Make sure taps are fully open. Check water lever sensor. (Refer to the PCB Connector Check.)
Check if there are any kinks in the inlet hoses and if inlet screens are clogged.
Check if there is enough water pressure and any frozen area in the unit(drain hose, etc.)
Measure the resistance of the water valve coil. CN6 Pin/CN1 Pin1,2,7,8,9=1.18 Кohms
Check pressure S/W and PCB for loose connections. (Refer to the PCB Connector Check.)
Wet clothes
Unbalanced load. Add more clothing to the load.
Due to excessive suds by using general detergent. Use HE (High-Efficiency) detergent or reduce the amount of detergent used.
Low Spin speed or Drain Only was selected. See, "Does not spin".
Drum full of suds
See, "Does not drain" and "Does not spin" and check the draining.
Check the PCB and drain pump for any loose wire connections.
Perform Quick Test Mode or a Board Output Test to drain.
Use HE (High-Efficiency) or low suds detergent specially formulated for front load washers.
Reduce the amount of detergent for that specific load size and soil level. Towels generally create more suds. Do a wash cycle with cold water and a tablespoon of salt without detergent.
Door does not lock
Door is not aligned or closed properly.
Perform Quick Test Mode. Check the output voltage of the door lock coil. If it reads 120 V, replace the door lock switch; if not, replace the PCB. (Refer to the PCB Connector Check.)
Door does not unlock
Check if the door is deformed. This may prevent the door from unlocking.
Door locks itself when the water level is too high. Opening the door will result in water draining.
Check the following with Board Input Test Mode:
Water level (frequency): Over 23.80 KHz. -> If so, refer to Does not drain. Temperature (inside drum): Higher than 60 °C /140 °F. -> If so, wait until it drops. When everything is normal, check the PCB connectors and door lock switch.
The display shows "The door will not unlock". Turn off the washer and then turn it on. If "The door will not unlock" still appears, check the PCB and door lock switch.
Perform Quick Test Mode. Check door lock. Check the output voltage of the door lock coil. If it reads 120 V, replace the door lock switch; if not, replace the PCB.
Buttons do not work
The Option and Function buttons respond differently according to each cycle.
Child Lock is activated. To disable, simultaneously hold down the Spin and Soil Level buttons until the washer beeps.
When "End" appears on the display, only the Power button works. Press the Power button and make new cycle selections.
Does not drain
Check for kinks or restrictions(frozen, etc) on 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.
Check if the water level signal input is correct. Go to Board Input Test Mode.
Go to Quick Test Mode and perform a Drain Pump Test.
Check if it reads AC 120 V (resistance+14.2 ± 7 % ohms) at the pump when a spin cycle is selected.
Check the pump at CN1 (PIN3) on the PCB. It should read AC 110 ~ 120 V.
Incorrect water temperature
Check if both of the water taps are fully open and the temperature selection is correct.
Make sure the domestic water heater is set to supply hot water lower than 120 °F (49 °C). Check the water heater capacity and recovery rate.
If the water heater is located far from the washer, screw out the hot water tap and let the water flow until you get hot water.
Too hot/too cold: A reduced amount of water is supplied while the PCB controls the influx to regulate the actual temperature of the water in the tub. This may seem to be significantly hotter/colder than expected.
Disconnect the inlet hoses from the water valve and remove any residue from the inlet screens.
Noisy and/or vibrates
Check if the washer is level and the lock nuts are tightened on the bottom plate.
Make sure the load is of adequate size and is not unbalanced.
Check if the motor is fastened enough.
Remove things that could contribute to noises/vibrations (such as shipping bolt, spacers and objects leaning on the washer).
Diagnosis
– Connect power to the diagnostic device. A last used code appears on the display. If no code appears, check the following as instructed.
Thermistor Check
Check Resistance at Pin #3 and #1 of CN501. Tester Check = 47 KOhm
Motor Check
Check Resistance at Pin #1 of CN801 and GND = 226 KOhm
Check Resistance at Pin #2 of CN801 and GND = 226 KOhm
Check Resistance at Pin #3 of CN801 and GND = 226 KOhm
Pump Motor Check
Check Voltage at Pin #5 of CN402 and Pin #2 of CN101
When Pump Motor operates = AC 120 V
Door Lock Check
Check Voltage at Pin #1 and #2 of CN404
When Door Lock operates = DC 12V
Water Level Sensor Check
Check Frequency at Pin #7 and #6 of CN501
Reset Frequency = 25.6 kHz
Check Frequency at Pin #8 and #6 of CN501
Reset Frequency = 25.6 kHz
Water Valve Check
Check Voltage at Pin #1, 2, 3, 4, 7 of CN402 and #2of CN101
When each Valve operates = AC 120V
Clutch Motor Check
Check Voltage at Pin #8 of CN402 and #2 of CN101
When Clutch Motor operates = AC 120V
AC Power Check
Check Voltage at Pin #1 of CN101 and #1 of CN102
Tester Check = AC 120V
Samsung Washer Repair WA50M7450A
1. Error code – Ub. Meaning – Unbalanced load prevents washer from spinning. Action – Redistribute the load, and then press the Start/Pause button.
2. Error code – dC/dC1. Meaning – The washer did not properly lock the door. Action – Make sure the door is firmly closed. Restart the washer. If the code reappears, call customer service.
3. Error code – 5C. Meaning – The washer does not drain. The washer may detect a small clog while draining. Action – 1.Restart the washer. 2.Select the Spin Only cycle. 3.Press the Start/Pause button to drain the water. If the washer still does not drain, call customer service.
4. Error code – 4C. Meaning – Water is not being supplied to the washer. Action – Make sure the water taps are open. Make sure the water hoses are not clogged. Make sure the water taps are not frozen. Make sure the washing machine is operating with sufficient water pressure. Make sure that the cold water tap and the hot water tap are properly connected. Clean the mesh filter as it may be clogged.
5. Error code – 4C2. Meaning – The hot water was supplied from the course washing the delicacy clothes. Action – Make sure the cold water supply hose is firmly connected to the cold water tap. If it is connected to the hot water tap, the laundry may be deformed with some cycles.
6. Error code – tC. Meaning – Temperature sensor problem. Action – Restart the washer. If the code reappears, call customer service.
7. Error code – 3C. Meaning – Motor problem. Action – Restart the washer. If the code reappears, call customer service.
8. Error code – 9C1/9C2. Meaning – High/low voltage detected. Action – Restart the washer. If the code reappears, call customer service.
9. Error code – HC. Meaning – Water temperature control problem. (Heater control). Action – Call customer service.
10. Error code – LC. Meaning – Water level problem. Action – Call customer service.
11. Error code – OC. Meaning – Water level sensor problem. Action – Call customer service.
12. Error code – 1C. Meaning – The Water Level sensor is not working properly. Action – Call customer service.
13. Error code – bC2. Meaning – Jammed button. Action – Call customer service.
14. Error code – AC. Meaning – Communication error (SUB (sensor) РВА <-> MAIN РВА). Action – Call customer service.
15. Error code – AC6. Meaning – Communication error (Inverter РВА <-> MAIN РВА). Action – Call customer service.
16. Error code – 8C. Meaning – MEMS sensor problem. Action – Call customer service.
17. Error code – SF. Meaning – System error. Action – Call customer service.
18. Error code – PC. Meaning – Clutch Problem. Action – Call customer service.
19. Error code – Ur. Meaning – Additional rinsing. • Show additional rinsing in sensing unbalance. • Method of releasing the display. Action – Any key input.
TEST MODES
1. Mode – Standby. How to enter. Set the scheduled time to 17:00 -> Press Start/Pause for 7 seconds -> Smart Install
2. Mode – Smart Install. How to enter. Press Start/Pause While displaying “AS”
3. Mode – Enter Smart Install. How to enter. Press Delay End While displaying “AS” delay end, Check devices in turm when pressing delay end.
4. Mode – Enter Smart Install. How to enter. Press the first button on the left at the bottom While displaying “AS”
5. Mode – Enter Smart Install. How to enter. Press the first button on the right at the bottom while displaying “AS”, “Cr”. Turn jog dial along the direction of CW when displaying. For models that do not feature the jog dial, press the 3rd button from the bottom left to display the information codes one by one with the latest first.
Automatic Mode of Smart Install
Manual Mode of Smart Install
Operation mode 1. Description – carry out test for machine door lockinq.
Operation mode 2. Description – carry out test for drainaqe pump operation.
Operation mode 3. Description – carry out test for operation of preparatory valve.
Operation mode Co. Description – carry out test for operation of cold water valve.
Operation mode Ho. Description – carry out test for operation of hot water valve.
Operation mode 6. Description – carry out test for operation of water shot valve, carry out test for operation of washing heater, carry out test for operation of rinsing.
Operation mode 7. Description – carry out test for operation of drainaqe pump.
Operation mode 8. Description – carry out test for operation of dehydration.
Operation mode 9. Description – carry out test for operation of drying heater and drying fan.
Operation mode 10. Description – carry out test for opening of machine door.
Operation mode OK(Ot). Description – Automatic mode of Smart Install is completed normally.
* Accessories not included in the product are not required to check and they can be skipped directly.
Identity of Smart Install completion
Result Enquiry of Automatic Mode of Smart Install
Diagnosis Information Display Mode
- Under the condition of appearance of "AS" identity, if the first button on the right at the bottom is pressed, "CR" identity will appear and diagnosis information display mode is entered.
- Under the condition of appearance of "CR" identity , if turn the jog dial control switch clockwise, diagnosis codes generated before will display 7 digits at most.
TROUBLESHOOTINGTrouble diagnosis
Because the micom for a washer is a complicated structure, a service call may be required.
Below is information for exact trouble diagnosis and proper repair guidelines.
Cautions for repair and replacement
Please follow the below instructions for trouble diagnosis and parts replacement.
Does not start
Replace the PCB if an error is detected.
Leaks
Does not tumble
Does not spin
Water does not fill
Wet clothes
Drum full of suds
Door does not lock
Door does not unlock
Water level (frequency): Over 23.80 KHz. -> If so, refer to Does not drain. Temperature (inside drum): Higher than 60 °C /140 °F. -> If so, wait until it drops. When everything is normal, check the PCB connectors and door lock switch.
Buttons do not work
Does not drain
For safety reasons, the washer does not tumble or spin with the door open.
Incorrect water temperature
Noisy and/or vibrates
Diagnosis
– Connect power to the diagnostic device. A last used code appears on the display. If no code appears, check the following as instructed.
Thermistor Check
Check Resistance at Pin #3 and #1 of CN501. Tester Check = 47 KOhm
Motor Check
Check Resistance at Pin #1 of CN801 and GND = 226 KOhm
Check Resistance at Pin #2 of CN801 and GND = 226 KOhm
Check Resistance at Pin #3 of CN801 and GND = 226 KOhm
Pump Motor Check
Check Voltage at Pin #5 of CN402 and Pin #2 of CN101
When Pump Motor operates = AC 120 V
Door Lock Check
Check Voltage at Pin #1 and #2 of CN404
When Door Lock operates = DC 12V
Water Level Sensor Check
Check Frequency at Pin #7 and #6 of CN501
Reset Frequency = 25.6 kHz
Check Frequency at Pin #8 and #6 of CN501
Reset Frequency = 25.6 kHz
Water Valve Check
Check Voltage at Pin #1, 2, 3, 4, 7 of CN402 and #2of CN101
When each Valve operates = AC 120V
Clutch Motor Check
Check Voltage at Pin #8 of CN402 and #2 of CN101
When Clutch Motor operates = AC 120V
AC Power Check
Check Voltage at Pin #1 of CN101 and #1 of CN102
Tester Check = AC 120V