Whirlpool Maytag MVW6200KW Manuel Technique page 27

12. Visually check the mounting bracket and electrical connections to the
motor and shifter.
➢ If visual check passes, go to step 13.
➢ If connections are loose, reconnect the electrical connections,
reassemble motor cover, and repeat step 1.
13. With an ohmmeter, check the harness for continuity between the main
control, motor, and run capacitor using the following test points.
Motor Harness Check
Motor Connector Pin-1 to Chassis GND
Motor Connector Pin-4 to Main Control J6-1
Motor Connector Pin-4 to Motor Capacitor Pin 1
Motor Connector Pin-3 to Main Control J6-4
Motor Connector Pin-3 to Motor Capacitor Pin 3
Motor Connector Pin-2 to Main Control J6-6
➢ If there is continuity, go to step 14.
➢ If there is no continuity, replace the lower machine harness and repeat
step 1.
14. With an ohmmeter, check resistance of motor windings at the following
motor connections.
Motor Winding
CW Winding
CCW Winding
➢ If values are open or out of range, replace motor.
➢ If values are correct, go to step 15.
15. Test Motor Run Capacitor.
NOTE: A faulty capacitor may cause the motor to "hum", not start, or
turn slowly.
a. Discharge the capacitor by touching the leads of a 20,000 Ω resistor to
the two terminals.
b. Disconnect the wires from the capacitor terminals.
c. With an ohmmeter, measure across the terminals and note reading.
➢ If a steady increase in resistance is noted, continue to step 16.
➢ If the capacitor is either shorted or open, replace capacitor, calibrate,
and repeat step 1.
16. If the preceding steps did not correct the motor problem, replace the
main control.
a. Unplug washer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Calibrate washer and perform the
Diagnostic Cycle or Component Activation to verify repair.
TEST #4: HMI
Conduct each test within HMI test in Service mode including Key, LED,
and Encoder Tests. This procedure is performed when any of the following
situations occurs during the HMI Tests.
➢ Key presses do not display correctly on the HMI.
➢ The LED group indicators doesn't lit up.
➢ Encoder turns do not display correctly on the HMI.
1. Unplug washer or disconnect power.
2. Access the console's electronic assemblies and visually check that the
J5 connector is inserted all the way into the main control and that the
HMI harness connector is fully seated on the HMI. Ensure the ribbon
cables are properly connected on both ends.
DO NOT REMOVE OR DESTROY
FOR SERVICE TECHNICIAN'S USE ONLY
Pinout Resistance
Pins 3 & 2 5-9.5 Ω
Pins 4 & 2 5-9.5 Ω
3. If both visual checks pass, follow procedure under
Control (ACU) to verify supply voltages.
4. Verify the continuity of the HMI harness.
ACU PIN
J5-1
J5-3
J5-4
➢ If continuity fails, replace the HMI harness and go to step 5.
➢ If continuity passes, replace the user interface and go to step 5.
5. Reassemble all parts and panels.
6. Plug in washer or reconnect power.
7. To verify repair, activate the Service mode, and then perform HMI test.
TEST #5: Temperature Thermistor
This test checks valves, main control, temperature thermistor, and wiring.
1. Check the thermistor by performing the Inlet Thermistor test under
Sensor Feedback mode in Service mode on
2. The screen will display the inlet thermistor temperature in degrees
Celsius. The cold valve will open and the displayed temperature will
drop. Then the hot valve will open and the displayed temperature will
increase.
➢ If the machine operates as expected then the thermistor is operating
correctly.
➢ If the temperature increases first then decreases, check the hose
connections and repeat.
➢ If the displayed temperature does not act as described then proceed to
step 3.
3. Unplug washer or disconnect power.
4. Remove console to access main control.
5. Remove connector J8 from the main control. With an ohmmeter,
measure the resistance of the temperature thermistor between pins
J8-9 and J8-8. Verify that the approximate resistance, shown in the
table below, is within ambient temperature range.
THERMISTOR RESISTANCE
Approx. Temperature
°F
32
41
50
59
68
77
86
95
104
113
122
131
140
149
TEST #1: Main
Color HMI PIN
Red J1-1
Yellow J1-2
Black J1-3
page 11.
Approximate Resistance
°C kΩ
0 163
5 127
10 100
15 79
20 62
25 50
30 40
35 33
40 27
45 22
50 18
55 15
60 12
65 10
27