Whirlpool WTW7120HC Manual De Instrucciones página 16

7. Unplug washer or disconnect power.
8. Tilt washer back and remove sound pad (if equipped) to access the
drive system (see Figure 6).
Motor Cover
Motor/Shifter
Motor Bolt
Connector
Figure 6 - Drive Area, Viewed From Bottom, Sound Pad (If Equipped)
Removed.
Shifter
Connection Connection
Figure 7 - Motor Cover Removed
9. Visually check the electrical connections to the shifter.
➢ If visual check passes, go to step 11.
➢ If connections are loose, reconnect the electrical connections and
repeat step 1.
10. With an ohmmeter, check the harness for continuity between the shifter
and main control using the following pinouts. See chart below.
Shifter Connector Harnesses
J15-1 (White wire) to shifter connector Pin 3 (White wire)
J15-4 (Orange wire) to connector Pin 1 (Orange wire)
11. Remove the motor bolt, then the motor cover (see Figure 7). Remove
the motor stator and the shifter coil and confirm that the slider on the
motor shaft moves freely (see Figure 8).
➢ If slider moves freely, and there are no indications of rubbing on the
inside diameter of the shifter coil and outside diameter of the slider, go
to step 13.
➢ If slider binds or does not move freely, or there are indications of
rubbing on the inside diameter of the shifter coil or outside diameter of
the slider, replace the drive.
16
FOR SERVICE TECHNICIAN'S USE ONLY
Recirculation Pump
Drain Pump
Stator
Ground Motor
Connection
Shifter
Connection Connection
Figure 8 - Checking Slider Movement/Alignment
a. Unplug washer or disconnect power.
b. Replace the drive.
c. Reassemble all parts and panels.
d. Plug in washer or reconnect power. Perform Service Diagnostics to
verify repair.
12. If the preceding steps did not correct the 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. Perform Service Diagnostics to
verify repair.
TEST #3b: Drive System – Motor
This test checks the wiring to the motor and the motor itself.
NOTE: Drain water from tub and remove any wash load items present in the
basket.
1. See Component Activation Mode, and check the motor and electrical
connections by performing the Low, Mid, and High Speed Spin Test
under Service Load Control Mode. The following steps assume that this
step failed.
2. Unplug washer or disconnect power.
3. Check to see if impeller will turn freely and is not connected to the
basket.
NOTE: Rotating the impeller quickly can cause the HMI to attempt to power
up, and may cause audible feedback and the main control to power up and
apply braking torque to the impeller.
➢ If impeller turns freely, go to step 4.
➢ If impeller does not turn freely, determine what is causing the
mechanical friction or lockup.
4. Remove console to access main control.
5. Visually check that the J3 connector is inserted all the way into the
main control.
➢ If visual checks pass, go to step 6.
➢ If visual checks fail, reconnect J3 and repeat step 1.
6. With an ohmmeter, verify resistance values as shown below:
Check Res.
between Value
connector Should
pins be:
J3, 1-2 8 - 10 Ω
J3, 1-3 8 - 10 Ω
Stator
Ground Motor
Connection
Go to Step Go to
7 if values Step 10
are: if values
are:
Much Much
> 10 Ω < 8 Ω
DO NOT REMOVE OR DESTROY
Go to Step
15 if:
8 - 10 Ω
8 - 10 Ω