Whirlpool W10441082B Manuel D'instructions page 14

FOR SERVICE TECHNICIAN'S USE ONLY
10. Service LED/DC Supply
The ACU is equipped with a status LED. This
LED indicates the health of the ACU. After
the ACU is plugged in, the LED will blink for
10 seconds, then it will become solidly lit.
This LED indicates the functionality of the
microcontroller and power supply:
• I f the LED is not lit, there is not 5 volts
DC supply to the microcontroller. Replace
the ACU.
• I f the LED is not solidly lit after 10 seconds
of blinking upon being powered up, the
microcontroller is not responding. Replace
the ACU.
• I f the LED is solidly lit during washer
operation, the ACU is probably OK and
the problem is elsewhere.
Check UI input voltage:
Verify that there is 5V between pin 1 and 3
at J18.
11. Unplug washer or disconnect power.
12. Reassemble all parts and panels.
13. Perform the "Quick Diagnostic Test"
on page 6 to verify repairs.
TEST #2: User Interface (UI)
This test is performed when any of the
following situations occurs during the
User Interface Test (see page 5):
Figure 5 - User Interface (UI), Housing Assemblies, and Cabling
Back
To ACU
Screws
Drum Light
NOTE:
The User Interface (UI) must
be replaced by removing the
back screws, and then removing
the graphic and electronic board.
PAGE 14
Console/Housing Assembly
J11 To
Maytag
Model
3 None of the indicators or display turn on
3 Some buttons do not light indicators
3 No beep sound is heard
None of the indicators or display turn on:
1. Unplug washer or disconnect power.
2. Remove the top panel to access the ACU.
3. Visually check that all ACU connectors are
inserted all the way into the ACU. See Figure 4.
4. Remove console assembly. Do not pull
on the wires between the console and ACU.
5. Visually check that all UI connectors are
inserted all the way into the UI. See Figure 5.
6. Visually check that the UI and housing
assembly is properly inserted into the front
console.
7. If all visual checks pass, perform TEST #1:
ACU Power Check, page 13, to verify supply
voltage and health of microcontroller.
 If supply voltages are present and
microcontroller is functioning properly,
replace the user interface and housing
assembly.
 If supply voltages are not present and
Service LED is off or blinking constantly,
replace the ACU.
8. Reassemble all parts and panels.
9. Plug in washer or reconnect power.
10. Perform the "User Interface Test"
(see page 5) to verify repair.
Whirlpool
Model
To ACU
J11 To
Drum Light
Back Screws
DO NOT REMOVE OR DESTROY
Console/
Housing Assembly