Whirlpool WTW5057LW0 Technical Manual page 30

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
Using Factory mode, 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
mode 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.
30
FOR SERVICE TECHNICIAN'S USE ONLY
Pinout Resistance
Pins 3 & 2 5-9.5 Ω
Pins 4 & 2 5-9.5 Ω
Using Factory
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 #1: Main
Color HMI PIN
Red J1-1
Yellow J1-2
Black J1-3