Whirlpool WFC8090GX Service Manual page 57

Replacing the Human-Machine Interface (continued)
6. Remove the inner door glass and catch. Set aside for
reinstallation to the new Outer Door/HMI Assembly (see
Figure 4).
Door
Catch
7. Disconnect the ACU and Drum Light harnesses from the
HMI. Unclip harness from HMI enclosure. See Figure 5.
Disconnect
Harnesses
8. Using a Phillips screwdriver, remove the two (2) screws
securing the hinge to the outer door/HMI assembly.
Remove hinge and harness assembly and set aside for
reassembly. See Figure 6.
Door
Glass
Figure 4
Unclip
Harness
Figure 5
Figure 6
9. Reverse procedure to reassembly all parts onto the new
Outer Door/HMI Assembly (see Figure 7).
FOR SERVICE TECHNICIAN'S USE ONLY
10. Check HMI input voltage:
Verify that there is 5V between pin 1 and 4
at J16.
If there is 5V, go to step 11.
If there is not 5V, disconnect J16 and
check for 15V between pin ? and pin ?.
If there is not 15V, replace the ACU.
11. Unplug washer/dryer or disconnect power.
12. Reassemble all parts and panels.
13. Perform the Service Diagnostic Mode
Tests on page 5 to verify repairs.
TEST #2: Human-Machine
Interface (HMI)
This test is performed when any of the
following situations occurs during the
Service Diagnostic Mode Tests (see page 5):
display does not turn on and/or no sound
is heard.
1. Unplug washer or disconnect power.
2. Gently lay washer/dryer on its right side
to access the ACU.
Figure 7 - Outer Door/HMI Assembly
3. Visually check that all ACU connectors are
inserted all the way into the ACU. See Figure 3,
page 10.
4. Visually check that all HMI connectors
are inserted all the way into the HMI.
HMI Board
Figure 4 - Human-Machine Interface (HMI) and Housing Assembly
To Drum Light
DO NOT REMOVE OR DESTROY
Whirlpool Smart All-In-One Washer & Dryer
COMPONENT ACCESS
5. If all visual checks pass, perform TEST #1:
ACU Power Check, page 10, to verify supply
voltage and health of microcontroller.
If supply voltages are present and
microcontroller is functioning properly,
replace the HMI and housing assembly.
If supply voltages are not present,
replace the ACU.
6. Reassemble all parts and panels.
7. Plug in washer/dryer or reconnect power.
8. Perform the Service Diagnostic Mode
Tests on page 5 to verify repair.
ACU Input
(3 pin
ACU Input
connector)
Fan Connector
Speaker
4-5
n