Component Testing Procedures - Amana NFW7200TW Technical Information

Component Testing Procedures

To avoid risk of electrical shock, personal injury or death; disconnect power to washer before servicing, unless
testing requires power.
NOTE: For ohm checks unplug harness connector on console and test from wire insertion side.
1
CN3
Thermister Check
Check Voltage at Pin #6 and #3 of CN3
Tester Check = DC2.5V
Door Switch Check
Check Voltage at Pin #6 and #4 of CN3
When Door Open = DC5V
When Door Close = DC0V
Water Sensor Check
Check Voltage at Pin #6 and #7 of CN3
Reset water level = DC2.5V, 25.8KHz
Check Voltage and Frequency at Pin #6
and #8 of CN3
Reset water level = DC2.5V, 25.8KHz
Sump Sensor Check
Check Voltage at Pin #4 and #3 of CN8
Tester Check = DC0V or 3.75V
WARNING
1
CN8
8
9
4
CN10
Motor Check
Resistance at Pin #1 and #2 of CN9 =11.6Ω
Resistance at Pin #1 and #3 of CN9 =11.6Ω
Resistance at Pin #2 and #3 of CN9 =11.6Ω
Door Lock Check
Check Voltage at Pin #1 of CN5 and Pin #7
of CN10
When Door Lock = AC120V
Check Voltage at Pin #1 of CN5 and Pin #2
of CN7
When Door Lock = AC120V
Door Unlock Check
Check Voltage at Pin #1 of CN5 and Pin #8
of CN10
When Door Unlock = AC120V
Drain Motor Check
Check Voltage at Pin #1 of CN5 and Pin #6
of CN10
When Drain Pump operates = AC120V
Water Valve Check
Check Voltage at Pin #1 of CN5 and Pin
#1,2,3,4 of CN10
When each Valve operates = AC120V
4
1
3
CN9
1
12
RY9
1
CN9
CN5
2
3
1
AC Power Check
Check Voltage at Pin #1 and #3 of CN5
Check Voltage at Pin #1 of CN5 and Pin #1
of CN6
Tester Check = AC120V
2