Whirlpool W10254428A Manual page 16

FOR SERVICE TECHNICIAN'S USE ONLY
4. Plug in washer or reconnect power.
5. With a voltmeter set to AC, attach the
leads across the pins of the suspect valve
(see chart in step 3). Run the "Quick
Diagnostic Test" and check for line voltage
across the pins of the valve. NOTE: Refer
to the "Quick Diagnostic Test" on pages 4–5
to determine when the cold, hot, and steam
valves are actuated. (Example: Cold valve is
actuated during test phase C02.)
If line voltage is present and valve still does
not activate, replace valve assembly.
If line voltage is not present, replace the CCU.
6. Unplug washer or disconnect power.
7. Reassemble all parts and panels.
8. Perform the "Quick Diagnostic Test"
to verify repairs.
TEST #7: Pressure Sensor
This test checks the pressure sensor, CCU,
and wiring. NOTE: Usually, if the pressure
sensor malfunctions, the washer will generate
a long fill or long drain error.
1. Check the functionality of the pressure
sensor by running a small load cycle. The
valves should turn off automatically after
sensing the correct water level in the tub.
The following steps assume that this step
was unsuccessful.
2. Press START/PAUSE to stop the cycle and
then press POWER. The cycle will cancel and
drain the water from the tub.
3. Unplug washer or disconnect power.
4. Remove top panel to access machine
electronics. Pressure sensor is located
at top right rear of cabinet.
5. Check hose connection between the
pressure sensor and the pressure dome
attached to the tub.
6. Check to ensure hose is routed
correctly in the lower cabinet and not
pinched or crimped.
7. Verify there is no water, suds, or debris
in the hose or dome. Disconnect hose from
pressure sensor and blow into hose to clear
water, suds, or debris.
8. Check hose for leaks. Replace if needed.
PAGE 16
9. Visually check that connector PS8 is
inserted all the way into the CCU (refer to
CCU diagram on page 12). Also check that
the pressure sensor harness is securely
connected to the sensor.
10. Check the harness between the CCU and
Pressure Sensor for continuity.
If there is continuity, go to step 11.
If there is no continuity, repair or replace
as necessary.
11. Plug in washer or reconnect power.
12. With a voltmeter set to DC, connect black
probe to CCU connector PS8, pin 8 (GND) and
red probe to PS8, pin 4 (+5V [Vcc]).
If +5VDC is present, replace the pressure
sensor.
If+5VDC is not present, perform TEST #1:
CCU Power Check on page 12.
13. If the preceding steps did not correct the
problem, replace the CCU.
Unplug washer or disconnect power.
Replace the CCU.
Reassemble all parts and panels.
Perform the "Quick Diagnostic Test"
on pages 4–5 to verify repair.
TEST #8: Drain Pump
Perform the following checks if washer does
not drain.
1. Check for obstructions in the usual areas.
Clean and then perform step 2.
2. Check the drain pump and electrical
connections by performing the "Quick
Diagnostic Test" on pages 4–5. The following
procedures assume that this step was
unsuccessful.
3. Unplug washer or disconnect power.
4. Remove top panel to access machine
electronics.
5. Visually check that the DP2 connector is
inserted all the way into the CCU. Refer to
CCU diagram on page 12.
If visual check passes, go to step 6.
If connector is not inserted properly,
reconnect DP2 and repeat step 2.
DO NOT REMOVE OR DESTROY