Service Manual

TESTING – WASHER
27” Stacked Laundry Center
n
3-9
11. Acvate Tachometer Vericaon Mode from the Service
Diagnosc Test Modes (see page 2-5). Slowly turn the
basket by hand. The four status LEDs should illuminate
one at a me to represent basket RPM.
¾ If the tachometer is not veried, go to step 12.
¾ If the tachometer is veried, go to step 17.
12. Unplug washer/dryer or disconnect power.
13. Tilt washer/dryer back to access the boom of the washer
and the drive motor area.
14. Visually check the electrical connecons to the shier.
¾ If visual check passes, go to step 15.
¾ If connecons are loose, reconnect the electrical
connecons and repeat step 1.
15. With an ohmmeter, check the harness for connuity
between the shier and main control using the pinouts in
the following chart.
¾ If there is connuity, go to step 16.
¾ If there is no connuity, replace the lower or upper
washer harness and repeat step 1.
Shier to Main Control & Drain Pump
Shifter connector Pin 1 to lower harness connector Pin 2 to main control J12-2
Shifter connector Pin 2 to lower harness connector Pin 4 to main control J12-1
Shifter connector Pin 3 to lower harness connector Pin 6 to main control J2-2
Shifter connector Pin 4 to lower harness connector Pin 1 to main control J12-3
Shifter connector Pin 5 to lower harness connector Pin 3 to main control J12-4
Shifter connector Pin 6 to lower harness connector Pin 5 to main control J2-1
16. Replace the shier assembly.
a. Unplug washer/dryer or disconnect power.
b. Replace shier assembly.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power. Calibrate
washer and perform Automac Test to verify repair.
For Service Technician Use Only
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
¾ If 120VAC is present, go to step 9.
¾ If 120VAC is not present, go to step 17.
Shifter Switch:
9. With a voltmeter set to DC, connect the
black probe to J12-4 (Circuit Gnd) and red
probe to J12-3 (Shifter Switch). In manual test
mode, switch between Spin and Agitate modes.
Voltage should toggle between 0 and +5VDC.
SPIN = +5 VDC
AGITATE = 0 VDC
¾ If voltage corresponds to setting, go to step 10.
¾ If voltage does not switch, check lower
harness connector according to diagram.
If voltage still does not switch, go to step 12.
Optical Sensor:
10. With a voltmeter set to DC, connect the
black probe to J12-4 (Circuit Gnd) and red
probe to J12-1 (+12VDC).
¾ If +12VDC is present, go to step 11.
¾ If +12VDC is not present, check lower
harness connector according to diagram.
If +12VDC is still not present, go to step 17.
11. Activate Tachometer Verification Mode
from the Service Diagnostic Test Modes
(see page 5). Slowly turn the basket by hand.
The four status LEDs should illuminate one
at a time to represent basket RPM.
¾ If the tachometer is not verified, go to step 12.
¾ If the tachometer is verified, go to step 17.
12. Unplug washer/dryer or disconnect power.
13. Tilt washer/dryer back to access the
bottom of the washer and the drive motor area.
14. Visually check the electrical connections
to the shifter.
¾ If visual check passes, go to step 15.
¾ If connections are loose, reconnect the
electrical connections and repeat step 1.
15. With an ohmmeter, check the harness for
continuity between the shifter and main control
using the pinouts in the following chart.
¾ If there is continuity, go to step 16.
¾ If there is no continuity, replace the lower
or upper washer harness and repeat step 1.
16. Replace the shifter assembly.
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 the main control.
a. Unplug washer/dryer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power.
Calibrate washer and perform Automatic Test
to verify repair.
TEST #3b: Drive System – Motor
This test checks the motor, motor windings,
wiring, and start capacitor.
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.
¾ If basket turns freely, go to step 4.
¾ 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.
Figure 4 - Shifter Assembly Strip Circuit (Shifter Switch: Open = SPIN, Closed = AGITATE)
Main Control
Shifter Assy
J12-4
J2-1
J5-2
N
Main Control
J12-1
J12-2
J2-2
J12-3Pin 4
Pin 1
Pin 6
Pin 5
Pin 2
Pin 3
J5-1
Circuit Ground
L1
+12VDC
120VAC
Motor
Shifter Switch
Optical
Sensor
Shifter Position
Input
RPM Input
Motor Resistance 2k to 3.5k ohms
Shifter Motor
TRIAC
Shifter to Main Control & Drain Pum
p
Shifter connector Pin 1 to lower harness connector Pin 2 to main control J12-2
Shifter connector Pin 2 to lower harness connector Pin 4 to main control J12-1
Shifter connector Pin 3 to lower harness connector Pin 6 to main control J2-2
Shifter connector Pin 4 to lower harness connector Pin 1 to main control J12-3
Shifter connector Pin 5 to lower harness connector Pin 3 to main control J12-4
Shifter connector Pin 6 to lower harness connector Pin 5 to main control J2-1
Pin 5
Pin 3
Pin 4
Pin 6
Pin 1
Pin 2
SHIFTER ASSEMBLY
17. If the preceding steps did not correct the problem, replace
the main control.
a. Unplug washer/dryer or disconnect power.
b. Replace the main control.
c. Reassemble all parts and panels.
d. Plug in washer/dryer or reconnect power. Calibrate
washer and perform Automac Test to verify repair.
The Shier (Actuator)
The shier, also know as the actuator, serves several funcons.
1. It has a synchronous motor that shis the splutch slider.
2. It monitors the posion of the splutch.
3. It houses a transmission speed/posion opcal sensor.
Figure 2
Figure 1 - Shifter (Actuator)