Whirlpool WFW94HEXR2 Manual page 15

FOR SERVICE TECHNICIAN'S USE ONLY
9. Plug in washer or reconnect power.
10. Perform the "User Interface Test"
(see page 5) to verify repair.
Some buttons do not light indicators:
1. Unplug washer or disconnect power.
2. Remove the top panel to access the CCU
and User Interface (UI).
3. Visually check that the UI and housing
assembly is properly inserted into the front
console.
4. If visual check passes, replace the UI and
housing assembly.
5. Reassemble all parts and panels.
6. Plug in washer or reconnect power.
7. Perform the "User Interface Test"
(see page 5) to verify repair.
No beep sound is heard:
1. Unplug washer or disconnect power.
2. Remove the top panel to access the CCU.
3. Visually check that all CCU connectors are
inserted all the way into the CCU. See Figure 4.
4. Remove console assembly. Do not pull
on the wires between the console and CCU.
5. Visually check that all UI connectors are
inserted all the way into the UI. See Figure 5.
6. If all visual checks pass, replace the UI
and housing assembly.
7. Perform the "User Interface Test"
(see page 5) to verify repair.
TEST #3: Motor Circuit
This test checks the motor, motor control unit
(MCU), and wiring.
IMPORTANT: A guide (W10271535) is
required to assemble the rotor onto the shaft.
The guide is inserted into the threaded hole,
and then the rotor is slid on over the guide.
From CCU MI3
(MCU Communications)
Figure 6 - Motor Control Unit (MCU)
DO NOT REMOVE OR
To Motor Locking Tab
From CCU MS2
(MCU Power)
DESTROY
NOTE: If the harness between the CCU and
MCU is removed or communications are
interrupted during operation, the MCU puts
the motor into a braking mode, resulting in a
significant drag on the drum when turned by
hand. This mode can be cleared by removing
power from the washer for a few seconds.
1. Check the motor and electrical connections
by performing the "Quick Diagnostic Test" on
page 6. 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 13.
 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 6, at left).
 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.
11. Run the "Quick Diagnostic Test" on page
6. IMPORTANT: Door must be closed and
locked to run motor.
Windings
8.5 - 14.0 Ω
8.5 - 14.0 Ω
8.5 - 14.0 Ω
PAGE 15