Whirlpool W10254428A Manual page 19

FOR SERVICE TECHNICIAN'S USE ONLY
Detergent Dispensing Controls
Dispenser Distribution System – Test #12
Expansion Board (EB) Power Check –
Test #13
Detergent Pump – Test #14
Level/Presence Sensor Module – Test #15
TEST #12: Dispenser
Distribution System
Perform the following checks if the washer
will not dispense detergent, bleach, or fabric
softener.
1. Check water supply to washer. Check water
hose connections to and inside the washer.
2. Verify dispenser drawer is not clogged
with detergent.
3. Unplug washer or disconnect power.
4. Remove the top panel to access the
machine electronics.
5. Check the mechanical linkage from
dispenser motor to top of dispenser.
6. Visually check that the DI6 connector is
inserted all the way into the CCU. Refer to
CCU diagram on page 12.
If visual check passes, go to step 7.
If connector is not inserted properly,
reconnect DI6 and retest.
7. Remove connector DI6 from the CCU.
With an ohmmeter, verify the resistance
values shown below across the following
DI6 connector pin-outs.
DISPENSER SYSTEM RESISTANCE
Component Resistance
Dispenser
1400-1600 ohms
Motor
DO NOT REMOVE OR
Contacts
Measured
DI6-1 DI6-2
DESTROY
If the motor resistance is good, go to step 8.
If the measurement does not match
the value shown in the chart, check the
harness and connections between the CCU
and dispenser motor for continuity. If the
harness and connections are good, replace
the dispenser motor.
8. Plug in washer or reconnect power. Run
the "Quick Diagnostic Test" on pages 4–5.
Between steps "C02" & "C03," observe that
the dispenser motor changes the direction
of the diverter valve from one position to
another. Ex: Prewash (position 1) to Main
Wash (position 2). Verify the motor has
repositioned the valve and water is flowing
into dispenser.
If the dispenser motor did not change
the direction of the diverter valve, replace
the motor.
9. If the preceding steps did not correct the
dispensing problem, replace the CCU and
retest dispenser system.
Unplug washer or disconnect power.
Replace the CCU.
Reassemble all parts and panels.
Perform the "Quick Diagnostic Test"
to verify repair.
PAGE 19