Samsung WF431ABP-XAA - Manuel (Page 20)

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Thermistor Check
Check Voltage at Pin #4 and #5 of CN7
Tester Check = DC 2.5V
If it reads 5V, Check if its connector is engaged
properly
Door Switch Check
Check Voltage at Pin #1 and #3 of CN4
When Door Open = DC 25V
When Door Close = DC 0V
Water Sensor Check
Check Voltage and Frequency at Pin #5 and #6
of CN7
Reset water level = DC2.5V, 25.8KHz
Check Voltage and Frequency at Pin #5 and #7
of CN7
Reset water level = DC2.5V, 25.8KHz
Hall Sensor Check
Check Voltage at Pin #4 and #2 of CN6
Tester Check = DC 0V or 3.75V
Check Voltage at Pin #4 and #3 of CN6
Tester Check = DC 0V or 3.75V
Motor Check
Resistance at Pin #1 and #2 of CN5 = 12Ω
Resistance at Pin #1 and #3 of CN5 = 12Ω
Resistance at Pin #2 and #3 of CN5 = 12Ω
Door Lock Check
Check Voltage at Pin #3 of CN2 and Pin #1 of CN3
When Door Lock = AC 120V
Door Unlock Check
Check Voltage at Pin #3 of CN2 and Pin #2 of
CN3
When Door Unlock = AC 120V
Drain Motor Check
Check Voltage at Pin #3 of CN2 and Pin #3 of
CN3
When Drain Motor operates = AC 120V
Water Valve Check
Check Voltage at Pin #3 of CN2 and Pin
#1,2,7,8,9 of CN3
When each valve operates = AC 120V
AC Power Check
Check Voltage at Pin #1 and #2 of CN2
Tester Check = AC 120V
Wash Heater Relay Check
Check Voltage at Pin #3 of CN2 and PIN #2 of
RY3
When Heater Relay operates = AC 120V
Steam Heater Relay Check(Only Steam Models)
Check Voltage at Pin #3 of CN2 and PIN #2 of
RY4
When Heater Relay operates = AC 120V
PROBLEM CHECKING AND METHOD OF PCB (WF431AB*)
- 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.
TROUBLE SHOOTING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer
before servicing, unless testing requires power.
WARNING
WF431ABP-03015A-03_EN.indd 20 2012-01-17 �� 5:22:21