Samsung WA48H7400 Programming manual

Fast Track Trouble shooting
Model: WA48H7400
Bulletins:
Publication # SM110414 Production Date: 11/04/14
SERVICE TEST MODE – POWER ON
DELAY END PRE SOAK+ 3 SECONDS
QUICK TEST MODE – POWER OFF
SPIN SOIL LEVEL
+ + POWER TOGETHER
Definition of Quick Test Mode:
- Check operation of all LED’s (Verify faulty LED).
- Check model and software version.
- Check different operating modes (e.g. water valve,
motor, door, drain pump, etc.).
All LED’s light up & sends out Beep Sound when it entered
Displays software version for a sec and clears EEPROM
(MEMORY)
When version is displayed, turn Jog-Dial so that version
disappears.
Press the following keys to test the components.
-Temp. Key : Water Valve Test
-Delay End Key : Door Lock/Unlock Test
-Spin : Drain Pump/Circulation Pump Test
The motor speed will be displayed when started
(It displays 0 when the motor does not spin).
Quick Spin Test Mode - press the Delay End and Self Clean
Keys for 3 seconds - Cannot enter once cycle started
Starts spinning and reaches to its maximum RPM then speed
drops immediately.
Hold Quick Spin Test Mode, press the Start/Pause button. It
will stop accelerating and hold its speed for 10 mins.
Cycle Count Check Mode -press the Pre Soak Key.
Tally’s the number of washings. The total number of
washings will light up and a signal LED will glow.
Max # of cycles is 1999 rolls to 0
S/W Version Check Mode - press the Soil Level Key
Board Input Test Mode - press the Delay End
Diagnostic Code Check Mode - press the extra rinse

CN802
1. CLUTH 6. RESET
2. WL_MAIN 7. 5V
3. STANDBY 8. GND
4. TX 9. 12V
5. RX 10. POWER ON
CN501
1. NC 8. WATER THERM
2. NC 9. CLUTCH SEN
3. NC 10. WATER SEN 1
4. NC 11. WATER SEN 2
5. NC 12. 5V
6. NC 13. CLUTCH
7. GND 14.
15. GND
SUB PCB

Hall Sensor Check
Check Voltage at Pin #4 and #3 of CN9
Tester Check = DC0.6V
Check Voltage at Pin #4 and #2 of CN9
Tester Check = DC0.6V
Motor Check
Resistance at Pin #1 of CN3 and GND
= 226㏀
Resistance at Pin #2 of CN3 and GND
= 226㏀
Resistance at Pin #3 of CN3 and GND
= 226㏀
Drain Motor_Pump Check
Check Voltage at Pin #3 of CN1 and Pin #5 of CN4
When Drain Pump operates = AC 120V
Water Valves/ Check
Check Voltage at Pin #3 of CN1 and Pin #1,2,3,4
of CN4 When Valves operates = AC 120V
Clutch-Motor
Check Voltage at Pin #3 of CN1 and Pin #8 of CN4
When Valves operates = AC 120V
AC Power Check
Check Voltage at Pin #1 and #3 of CN1
Tester Check = AC 120V
Door Lock Check
Check Voltage at Pin #3 and #5 of CN8
When Door Lock = DC 6.5V