Whirlpool WTW7120HC Manual De Instrucciones página 17

7. Tilt washer back to access the bottom of the washer and the drive
motor area (see Figure 6).
8. Visually check that the motor connection on the drive is fully inserted
into its mating connector.
9. With an ohmmeter, check for continuity on the motor harness between
all pins on the J3 machine/motor control connector and the drive motor
connector.
➢ If there is continuity, go to step 10.
➢ If there is no continuity, replace the lower washer harness and run
Service Diagnostics to verify repair.
10. Tilt washer back (if it is not already) to disconnect the motor connector
and use an ohmmeter to verify the motor resistance values at the drive
motor connector (see Figure
Check Res. value
between should be:
drive motor
connector
2-4 (R-BR) 8 - 10 Ω
2-3 (BR-BK) 8 - 10 Ω
11. Remove the motor bolt, then the motor cover (see
12. Remove the shifter coil and stator to access the motor connection.
13. Visually check that motor electrical connection cover is fully seated
(see Figure 9).
➢ If visual checks pass, go to step 14.
➢ If visual checks fail, fully seat the motor connection cover, reassemble
stator and motor cover, and repeat step 1.
Motor Electrical
Connection Cover
(verify that clips are
fully seated)
Figure 9 - Removing Shifter Coil and Checking Motor Electrical Connection
14. Replace the drive and perform Service Diagnostics to verify repair.
➢ If If the motor still fails to operate, go to step 15.
15. If the tests above have failed to fix motor drive issues, the main control
has failed:
➢ Unplug washer or disconnect power.
➢ Replace the main control assembly.
➢ Perform Service Diagnostics to verify repair.
DO NOT REMOVE OR DESTROY
FOR SERVICE TECHNICIAN'S USE ONLY
8).
Go to Go to Go to Step
Step 11 Step 14
if values if values
are: are:
8 - 10 Ω
Much Much
> 10 Ω < 8 Ω
8 - 10 Ω
Figure 10).
TEST #4: HMI Test
Conduct each test within
Display, Audio 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 indicators do not light up.
➢ The display does not show the image sequence.
➢ No audio feedback is heard.
➢ 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
J14 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.
15 if 3. If both visual checks pass, follow procedure under
Control (ACU)
4. Verify the continuity of the HMI harness.
ACU PIN
J14-1
J14-3
J14-4
➢ 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
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.
2. The screen will display the inlet thermistor temperature in degree
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 J16 from the main control. With an ohmmeter,
measure the resistance of the temperature thermistor between pins
J16-4 and J16-8. Verify that the approximate resistance, shown in the
table below, is within ambient temperature range.
HMI Test in Service Mode including Key, LED,
to verify supply voltages.
Color
Red
Yellow
Black
TEST #1: Main
HMI PIN
J1-1
J1-3
J1-4
HMI Test.
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