Service Manual

3-8
n
27” Stacked Laundry Center
TESTING – WASHER
For Service Technician Use Only
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.
TEST #3 Drive System
Pre-Test Procedure
1. Acvate Service Diagnosc Test Mode, retrieve any fault/
error codes, and clear them. If the displayed error codes
are F7-E1, F7-E5, or motor speed codes, there is likely a
motor, capacitor, or shier related issue.
2. Once the error codes are cleared, enter Manual Test
Mode and run the Heavy Agitaon test; if the motor runs
aer 15–20 seconds, there is not a problem with the
motor, capacitor, control, or wiring harness connecons
(although the black wire from the shier to the control
should sll be checked).
NOTE: The speed wheel in the transmission only turns
during the spin cycle.
3. While in Manual Test Mode, try to get the washer to spin;
if the motor hums briey and then shuts down (with the
lid lock indicator blinking), go to Fault Code Display Mode
and look for shier or basket speed errors, which verify an
issue with the shier/sensor assembly (opcal sensor is
not reading the motor speed).
TEST #3a: Drive System – Shier
This test checks connecons, shier motor, switch, and opcal
sensor.
NOTE: Refer to Figure 2, “Shier Assembly Strip Circuit” on
page 3-9 for tests and measurements.
IMPORTANT: Drain water from tub before accessing boom of
washer.
Functional Check:
1. Check the shier and electrical connecons by performing
both the Spin AND Agitate test under Manual Test Mode
on page 2-11. 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 fricon 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.
¾ If visual checks pass, go to step 6.
¾ If connectors are not inserted properly, reconnect J12
and J2 and repeat step 1.
Shifter Motor:
NOTE: Before starng the electrical check, verify that the cam
on the splutch is moving freely and not binding.
6. Remove connector J2 from main control. With an
ohmmeter, verify resistance of the shier motor across
the following J2 connector pinouts:
Component J2 Connector Pinout
Shier Motor J2, 1 & 2
Resistance should be 2k to 3.5k Ω.
¾ If values are correct, reconnect J2 and proceed to step 7.
¾ If values are open or out of range, check lower washer
harness connector according to diagram. If the values
are sll open or out of range, go to step 13.
7. Plug in washer/dryer or reconnect power.
8. With a voltmeter set to AC, connect the black probe to
J2-2 (L1) and red probe to J2-1 (N). Acvate shier motor
by switching between Spin and Agitate modes. Energize
outputs using Manual Test Mode on page 2-11.
IMPORTANT: Lid must be closed with Lid Lock enabled to
run the SPIN and AGITATE tests.
NOTE: It will take 4–15 seconds for the shier to change
states.
¾ If 120 VAC is present, go to step 9.
¾ If 120 VAC 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 (Shier Switch).
In manual test mode, switch between Spin and Agitate
modes. Voltage should toggle between 0 and +5 VDC.
SPIN = +5 VDC
AGITATE = 0 VDC
¾ If voltage corresponds to seng, go to step 10.
¾ If voltage does not switch, check lower harness
connector according to diagram. If voltage sll 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 (+12 VDC).
¾ If +12 VDC is present, go to step 11.
¾ If +12 VDC is not present, check lower harness
connector according to diagram. If +12 VDC is sll not
present, go to step 17.