Samsung WF438AAR, Troubleshooting Manual

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# tsWF438 RevG 03/21/2011
3
Washer Connector Checks WF438
CN3
1 Door Lock Close (Blk)
2 Door Lock Open (Wht)
3 Drain Pump (Vio)
4 Steam Valve (Brn)
5 Bleach Valve (Pnk)
6 Circulation Pump (Gry)
7 Pre Valve (Yel)
8 Main Valve (Blu)
9 Hot Valve (Red)
CN2
1 AC Pwr (L) (Blk)
2 Pwr Sw (Yel)
3 Valves Common, Lock Sw (Gry)
CN1
1 Reactor Connector Port (Red)
2 Reactor Connector Port (Red)
RY4 Steam Heater Relay
1 (Wht)
2 (Blk)
RY1 Power Relay
1 (Blu)
2 (Wht)
RY2 Washer Heater Relay
1 (Blk)
2 (Red)
CN5
1 Motor Pwr U Phase (Blu)
2 Motor Pwr V Phase (Wht)
3 Motor Pwr W Phase (Red
CN6 (Hull Sensor)
1 +5 vdc (Pnk)
2 Sensor Signal (Red)
3 Sensor Signal (Blu)
4 Ground (Org)
CN8 (Display Connector)
1 T Comm Port (Blu)
2 R Comm Port (Wht)
3 Rest Signal (Yel)
4 Ground (Org)
5 +5 vdc (Pnk)
6 +15 vdc (Red)
CN7
4 Water Temp Thermistor (Yel)
5 Water Temp Thermistor Gnd (Org)
6 Water Level Sensor (Pnk)
7 Water Level Sensor (Vio)
CN4
1 Door Sw (Org)
3 Door Sw (Gry)
7 AG Sensor (Brn)
8 AG Sensor (Yel)
Water Temperature Thermistor Check
Test 1 Test 2
Connector CN 7 Pin 4 (Yellow) and CN7 Pin 5
(Orange) Operating voltage at Room temperature Operating Resistance at Room
Temperature (Power off) Dis-
connect CN7
4.2VDC (5VDC May indicate a connector
issue) 50-57kΩ
Door Switch Check
Test 1 Test 2
Connector CN4 Pin 1 (Org) and CN4 Pin 3 (Gray) 25VDC Door Open, 0VDC Door Closed Operating Resistance with
power off
24kΩ
Water Level Sensor Check
Test 1 Test 2
Voltage: Connector CN 7 Pin 6 (Pink) and CN7 Pin
5 (Orange) And Connector CN 7 Pin 7 (Violet) and
CN7 Pin 5 (Orange)
Resistance: Connector CN 7 Pin 6 (Pink) and CN7
Pin 7 (Violet)
Operating voltage at no water in the
drum- Operating Resistance (Power
off)
2.5VDC Pin 6 (Pink) and Pin 7 (Violet)
22- 24Ω
Hall Sensor Check
Test 1 Test 2
Connector CN6 Pin 4 (Orange) and Pin 2 (Red) ad-
ditionally Pin 4 (Orange) and Pin 3 (blue) Manually spin the drum to see the volt-
age change, Power On N/A
0Vdc or 3.75Vdc
Motor Check
Test 1 Test 2
Connector CN5 Pin 1 (Blue), Pin 2 (White) and Pin
3 (Red) Power Off 11.5Ω across Pins 1-2, Pins 1
-3, & Pins 2-3 N/A
A/C Power Check
Test 1 Test 2
Connector CN 2 Pins 1 (Black) and 2 (Yellow) Power On 120VAC N/A