Whirlpool W10254428A Manual page 14

FOR SERVICE TECHNICIAN'S USE ONLY
IMPORTANT: A guide (W10271535) is
required to assemble the rotor onto the shaft.
W10271535 is inserted into the threaded hole,
and then the rotor is slid on over the guide.
1. Check the motor and electrical connections
by performing the "Quick Diagnostic Test" on
pages 4–5. The following steps assume that
this step was unsuccessful.
2. Unplug washer 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 the top and rear panels to access
the machine electronics and motor components.
5. Visually check that connectors MS2 and MI3
are inserted all the way into the CCU. Refer to
CCU diagram on page 12.
If visual checks pass, go to step 6.
If visual checks fail, reconnect MS2 and
MI3, and repeat step 1.
6. Visually check that all connectors are
inserted all the way into the MCU (see Figure 12,
page 13).
If visual checks pass, go to step 7.
If visual checks fail, reconnect the
MCU connectors and repeat step 1.
7. Check the motor windings. Disconnect the
motor harness from the MCU. With an ohmmeter,
verify the resistance values as shown below:
Motor Harness
Pins 1 & 2
Pins 2 & 3
Pins 1 & 3
If the values are outside the range or open,
replace stator assembly; otherwise, reconnect
the motor harness and go to step 8.
8. Check the two harnesses between the
CCU and MCU for continuity.
If there is continuity, go to step 9.
If there is no continuity, replace the main
lower harness.
9. With a voltmeter set to AC, connect the
leads across pins 1 and 2 of connector MS2.
10. Plug in washer or reconnect power.
PAGE 14
11. Run the "Quick Diagnostic Test" on pages
4–5. IMPORTANT: Door must be closed and
locked to run motor.
12. When the test shows "C05 & C08" on the
display, the motor is powered and line voltage
from the CCU should be present across pins
1 & 2 of connector MS2.
13. Unplug washer or disconnect power.
14. Reassemble all parts and panels.
15. Perform the "Quick Diagnostic Test"
on pages 4–5 to verify repair.
TEST #4: Door Lock System
Perform the following checks if the washer
does not lock (or unlock).
1. Check lid lock mechanism for obstruction
or binding. Repair as necessary.
2. Unplug washer or disconnect power.
3. Remove top panel to access machine
electronics.
4. Visually check that the DL3, DLS2, and
DCS3 connectors are inserted all the way into
the CCU. Refer to CCU diagram on page 12.
5. Referring to the chart below, disconnect
the specified connectors from the CCU. With
an ohmmeter, verify resistance values listed
Windings ( )
in the chart. NOTE: To measure the door lock
8.5 - 14.0
switch in the "locked" position, plug in washer
8.5 - 14.0
or reconnect power. Press the POWER button,
8.5 - 14.0
select any cycle, and then press START.
Actuation of the door lock solenoid should be
heard. At that point, unplug the washer and
disconnect DLS2 from the CCU and measure
resistance across pins 1 & 2.
If line voltage is present, replace the MCU.
If line voltage is not present, replace the CCU.
If visual check passes, go to step 5.
If any of the connectors are not inserted
properly, reconnect and retest door lock.
DOOR LOCK RESISTANCE
Component Resistance
Door Closed = 0 ohms
Door Switch
Door Open = Open Circuit
63 ohms
Door Lock
Coils
63 ohms
Door Lock Locked = 0 ohms
Switch Unlocked = Open Circuit
If resistance values are good, go to step 6.
DO NOT REMOVE OR DESTROY
Contacts
Measured
DCS3-1 DCS3-3
DL3-1 DL3-2
DL3-2 DL3-3
DLS2-1 DLS2-2