Whirlpool W10254428A Manual page 15

FOR SERVICE TECHNICIAN'S USE ONLY
If any of the measurements do not match the
values shown in the chart, check the harness
of the suspected component between the
CCU and door lock mechanism for continuity.
If the harness and connections are
good, replace the door lock mechanism.
NOTE: To minimize risk of damage to door
lock/switch wires, remove the door lock
mechanism screws before removing the
front panel.
6. If the preceding steps did not correct the
lock problem, replace the CCU and retest door
lock mechanism.
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 #5: Drum Light
This test is performed if the drum LED does
not light.
1. Press and hold the EcoBoost/Drum Light
button on the console until the LCD screen
acknowledges the drum light is on.
If the LCD does not confirm the button
press, replace the UI.
If the LCD confirms the button press,
go to step 2.
2. Unplug washer or disconnect power.
3. Remove the top panel to access CCU
and user interface (UI).
4. Verify the drum light connector (P13)
is securely connected to the UI.
5. Check harness and connections between
the drum light and the UI.
If the connections are OK, go to step 6.
If not, repair or replace as needed.
6. Unplug the drum light connector (P13)
from the UI.
7. Plug in washer or reconnect power.
8. Press and hold the EcoBoost/Drum
Light button on the console until the LCD
acknowledges the drum light is on.
9. With a multimeter set to milliamps, measure
the current across UI connector P13, pins 1
DO NOT REMOVE OR DESTROY
and 3. If the drum LED driver is working
properly, you should measure 150–370 mA.
If the current is present, replace
the drum LED.
If the current is not present, replace the UI.
10. Unplug washer or disconnect power.
11. Reassemble all parts and panels.
Water Level Controls
Water Inlet Valves – Test #6
Pressure Sensor – Test #7
Drain Pump – Test #8
Flow Meter – Test #9
TEST #6: Water Inlet Valves
This test checks the electrical connections
to the valves and the valves themselves.
1. Check the relays and electrical
connections to the valves by performing the
"Quick Diagnostic Test" on pages 4–5. The
following steps assume one or more of the
valves did not turn on.
2. For the valve(s) in question, check the
individual solenoid coils:
a. Unplug washer or disconnect power.
b. Remove top panel to access machine
electronics.
c. Remove connectors VCH7 and VSF2 from
the CCU. Refer to CCU diagram on page 12.
d. Check harness connections to the
solenoid valves. Verify continuity in harness
between CCU and solenoid valves.
3. Check valve coil resistance at the valves,
or across the following VCH7 and VSF2
connector pin-outs:
Valve
Cold Fill Valve
Hot Fill Valve
Steam Valve
Resistance should be ~990 Ω.
If resistance readings are tens of ohms outside
the value or open, replace the valve assembly.
If resistance readings are within range,
reconnect VCH7 and VSF2 to CCU and go
to step 4.
Pinout
VCH7, pins 1 & 2
VCH7, pins 3 & 4
VSF2, pins 1 & 2
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