Test #3B: Drive System-Motor - Whirlpool WETLV27HW0 Service Manual

SPIN = +5 VDC
AGITATE = 0 VDC
If voltage corresponds to setting, go to step 10.
If voltage does not switch, check lower
harness connector according to diagram.
If voltage still does not switch, go to step 12.
11. Activate Tachometer Verification Mode from the Service
Optical Sensor:
Diagnostic Test Modes (see page 2-5). Slowly turn the
basket by hand. The four status LEDs should illuminate
10. With a voltmeter set to DC, connect the
one at a time to represent basket RPM.
black probe to J12-4 (Circuit Gnd) and red
¾ If the tachometer is not verified, go to step 12.
probe to J12-1 (+12VDC).
¾ If the tachometer is verified, go to step 17.
If +12VDC is present, go to step 11.
12. Unplug washer/dryer or disconnect power.
13. Tilt washer/dryer back to access the bottom of the washer
If +12VDC is not present, check lower
and the drive motor area.
harness connector according to diagram.
14. Visually check the electrical connections to the shifter.
If +12VDC is still not present, go to step 17.
¾ If visual check passes, go to step 15.
11. Activate Tachometer Verification Mode
¾ If connections are loose, reconnect the electrical
from the Service Diagnostic Test Modes
connections and repeat step 1.
(see page 5). Slowly turn the basket by hand.
15. With an ohmmeter, check the harness for continuity
between the shifter and main control using the pinouts in
The four status LEDs should illuminate one
the following chart.
at a time to represent basket RPM.
¾ If there is continuity, go to step 16.
If the tachometer is not verified, go to step 12.
¾ If there is no continuity, replace the lower or upper
washer harness and repeat step 1.
If the tachometer is verified, go to step 17.
Shifter to Main Control & Drain Pump
12. Unplug washer/dryer or disconnect power.
Shifter connector Pin 1 to lower harness connector Pin 2 to main control J12-2
13. Tilt washer/dryer back to access the
Shifter connector Pin 2 to lower harness connector Pin 4 to main control J12-1
bottom of the washer and the drive motor area.
Shifter connector Pin 3 to lower harness connector Pin 6 to main control J2-2
14. Visually check the electrical connections
Shifter connector Pin 4 to lower harness connector Pin 1 to main control J12-3
to the shifter.
Shifter connector Pin 5 to lower harness connector Pin 3 to main control J12-4
If visual check passes, go to step 15.
Shifter connector Pin 6 to lower harness connector Pin 5 to main control J2-1
If connections are loose, reconnect the
16. Replace the shifter assembly.
electrical connections and repeat step 1.
a. Unplug washer/dryer or disconnect power.
b. Replace shifter assembly.
15. With an ohmmeter, check the harness for
c. Reassemble all parts and panels.
continuity between the shifter and main control
d. Plug in washer/dryer or reconnect power. Calibrate
using the pinouts in the following chart.
washer and perform Automatic Test to verify repair.
If there is continuity, go to step 16.
If there is no continuity, replace the lower
or upper washer harness and repeat step 1.
SHIFTER ASSEMBLY
N
Main Control
J5-2
Shifter Motor
TRIAC
Circuit Ground
+12VDC
Figure 4 - Shifter Assembly Strip Circuit (Shifter Switch: Open = SPIN, Closed = AGITATE)
For Service Technician Use Only
Motor Resistance 2k to 3.5k ohms
Pin 5
Pin 6
J2-1
Pin 3
Pin 5
J12-4
Pin 2
J12-1
Pin 4
a. Unplug washer/dryer or disconnect power.
b. Replace shifter assembly.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power.
Calibrate washer and perform Automatic Test
to verify repair.
17. If the preceding steps did not correct the problem, replace
17. If the preceding steps did not correct the
the main control.
problem, replace the main control.
a. Unplug washer/dryer or disconnect power.
a. Unplug washer/dryer or disconnect power.
b. Replace the main control.
b. Replace the main control.
c. Reassemble all parts and panels.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power. Calibrate
washer and perform Automatic Test to verify repair.
d. Plug in washer/dryer or reconnect power.
Calibrate washer and perform Automatic Test
The Shifter (Actuator) to verify repair.
TEST #3b: Drive System – Motor
The shifter, also know as the actuator, serves several functions.
1. It has a synchronous motor that shifts the splutch slider.
This test checks the motor, motor windings,
2. It monitors the position of the splutch.
wiring, and start capacitor.
3. It houses a transmission speed/position optical sensor.
NOTE: Refer to Figure 5, "PSC Motor Strip
Circuit" on page 15 for tests and measurements.
IMPORTANT: Drain water from tub before
accessing bottom of washer.
1. Check the motor and electrical connections
by performing the Gentle or Heavy Agitation test
under Manual Test Mode on page 9. Verify that
the basket is spinning in a clockwise direction
while performing Low or High Spin test under
Manual Test Mode on page 9. The following
steps assume that this step was unsuccessful.
2. Unplug washer/dryer or disconnect power.
3. Check to see if basket will turn freely.
If basket turns freely, go to step 4.
If basket 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 J12 and J2 connectors
are inserted all the way into the main control.
Shifter Assy
Pin 6
Pin 3
120VAC
Motor
Pin 1
Pin 4
Shifter Switch
Pin 1
Optical
Pin 2
Sensor
Figure 2
TESTING – WASHER
Figure 1 - Shifter (Actuator)
Main Control
J2-2
Shifter Position
J12-3
Input
J12-2
RPM Input
DO NOT REMOVE OR DESTROY
27" Stacked Laundry Center
L1
J5-1
3-9
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