Service Manual

TESTING – WASHER
27” Stacked Laundry Center
n
3-11
For Service Technician Use Only
MOTOR ASSEMBLY
Figure 3
14. With an ohmmeter, check resistance of motor windings at
the following motor connecons.
NOTE: If the console has a cycle selector knob and 4
rotary switches, the motor size is 1/3 HP.
Size Motor Winding Motor Pinout Resistance
1/4 HP CW Winding Pins 4 & 2 5 to 9.5
CCW Winding Pins 4 & 2 5 to 9.5
1/3 HP CW Winding Pins 4 & 2 3.5 to 6
CCW Winding Pins 4 & 2 3.5 to 6
¾ If values are open or out of range, replace motor.
¾ If values are correct, go to step 15.
Test Motor Run Capacitor/Inductor:
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.
¾ If a steady increase in resistance is noted, connue to
step 16.
¾ If the capacitor is either shorted or open, replace
capacitor, calibrate, and repeat step 1.
16. If the preceding steps did not correct the motor 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.
3$*(
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
Figure 5 - PSC Motor Strip Circuit (shown in On position)
Main Control
CW TRIAC
Main Control
CCW TRIAC
Pin 2
Pin 1
Pin 4
Pin 3
J2-5
J2-6
J5-2
PSC Motor
Run
Cap/
Inductor
CW Winding*
CCW Winding*
L1
N
* 1/3 HP Motor – Each Winding 3.5 to 6 ohms/ * 1/4 HP Motor – Each Winding 5 to 9.5 ohms
1
3
¾ If visual checks pass, go to step 6.
¾
If connectors are not inserted properly,
reconnect J12 and J2 and repeat step 1.
6. Plug in washer/dryer or reconnect power.
Run the Gentle Agitation test under Manual Test
Mode on page 9.
7. With a voltmeter set to AC, connect black
probe to J2-4 (L1) and red probe to J2-6 (CW
Winding).
¾ If 120VAC is cycling ON during CW rotation,
go to step 8.
¾ If 120VAC is not present, go to Test #1:
Main Control, page 12.
8. With a voltmeter set to AC, connect black probe
to J2-4 (L1), red probe to J2-5 (CCW Winding).
¾ If 120VAC is cycling ON during CCW
rotation, go to step 9.
¾ If 120VAC is not present, go to Test #1:
Main Control, page 12.
9. Unplug washer/dryer or disconnect power.
10. Remove connector J2 from main control.
With an ohmmeter, check resistance of motor
windings across the following J2 connector
pinouts:
NOTE: If the console has a cycle selector knob
and 4 rotary switches, the motor size is 1/3 HP.
¾ If values are open or out of range, go to step 11.
¾ If values are correct, go to step 15.
11. Tilt washer/dryer back to access drive
system.
12. Visually check the mounting bracket and
electrical connections to the motor and shifter.
Verify that the wires between the motor and the
harness are connected this way: Black-white/
White, Orange/Yellow, and Red/Red.
¾ If visual check passes, go to step 13.
¾ 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.
¾ If there is continuity, go to step 14.
¾ If there is no continuity, replace the lower
or upper washer harness (depending on
where the issue was) and repeat step 1.
14. With an ohmmeter, check resistance of motor
windings at the following motor connections.
NOTE: If the console has a cycle selector knob
and 4 rotary switches, the motor size is 1/3 HP.
¾ If values are open or out of range, replace
motor.
¾ 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 1 resistor to the two terminals.
b. Disconnect the wires from the capacitor
terminals.
Motor Winding J2 Pinout
CW Winding J2, 4 & 6
Lower harness
connector, 8 & 9
CCW Winding J2, 4 & 5
Lower harness
connector, 8 & 10
Size
1/4 HP
Resistance
5 to 9.5 Ω
5 to 9.5 Ω
CW Winding J2, 4 & 6
Lower harness
connector, 8 & 9
CCW Winding J2, 4 & 5
Lower harness
connector, 8 & 10
1/3 HP
3.5 to 6 Ω
3.5 to 6 Ω
Motor Harness Check
Motor connector Pin 1 to chassis ground
Motor connector Pin 3 to lower harness connector Pin 10 to main control J2-5
Motor connector Pin 3 to run capacitor Pin 3
Motor connector Pin 4 to lower harness connector Pin 9 to main control J2-6
Motor connector Pin 4 to run capacitor Pin 1
Motor connector Pin 2 to lower harness connector Pin 8 to main control J2-4
Motor Winding Motor Pinout
CW Winding Pins 4 & 2
CCW Winding Pins 3 & 2
Size
1/4 HP
Resistance
5 to 9.5 Ω
5 to 9.5 Ω
CW Winding Pins 4 & 2
CCW Winding Pins 3 & 2
1/3 HP
3.5 to 6 Ω
3.5 to 6 Ω
J2-4
J5-1
K4
Main Relay
Pin 9
Pin 10
Pin 8
PSC Drive Motor:
Run Capacitor/Inductor:
Motor Connector, 4-pin
Drive Motor
Belt Pulley
Capacitor Connector, 2-pin
Figure 2
Figure 1