Test #2: Human-Machine Interface (Hmi) - Whirlpool WFC8090GX Service Manual

If there is not 5V, disconnect J16 and
check for 15V between pin ? and pin ?.
If there is not 15V, replace the ACU.
COMPONENT TESTING
11. Unplug washer/dryer or disconnect power.
12. Reassemble all parts and panels.
13. Perform the Service Diagnostic Mode
WARNING
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
Electrical Shock Hazard
Service Diagnostic Mode Tests (see page 5):
Disconnect power before servicing.
display does not turn on and/or no sound
Replace all parts and panels before operating.
is heard.
Failure to do so can result in death or
electrical shock.
1. Unplug washer or disconnect power.
2. Gently lay washer/dryer on its right side
to access the ACU.
ACU
3. Visually check that all ACU connectors are
+5 VDC J16-1
inserted all the way into the ACU. See Figure 3,
page 10.
WIN J16-2
4. Visually check that all HMI connectors
GND J16-3
are inserted all the way into the HMI.
+12.7 VDC J16-4
Figure 1 - Human-Machine Interface (HMI) Strip Circuit
Figure 4 - Human-Machine Interface (HMI) and Housing Assembly
HUMAN-MACHINE INTERFACE (HMI)
3-6 Whirlpool Smart All-In-One Washer & Dryer
n
For Service Technician Use Only
HMI
CN1-4
GND
CN1-3 WIN
CN1-2 OPEN
CN1-1 +12.7 VDC
ACU Input
To Drum LED
connector)
Speaker
Connector
Speaker
Figure 2 - Connector Locations on HMI
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.
TEST #2: Human-Machine Interface
8. Perform the Service Diagnostic Mode
(HMI)
Tests on page 5 to verify repair.
This test is performed when any of the following situations
occurs during the Service Diagnostic Mode Tests (see page
2-3): 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. Remove AC shield and ACU cover.
3. Visually check that all ACU connectors are inserted all the
way into the ACU. See Figure 2, page 3-5.
4. Visually check that all HMI connectors are inserted all the
way into the HMI (see Figure 2 below).
5. If all visual checks pass, perform TEST #1: ACU Power
Check, page 3-4, to verify supply voltage and health of
micro-controller.
¾ If supply voltages are present and micro-controller
is functioning properly, replace the HMI and housing
assembly.
¾ 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 2-3 to
verify repair.
(3 pin
ACU Input
(3 pin connector)