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

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