Service Manual

3-20
n
Whirlpool & Maytag Front-Load Dryers
COMPONENT TESTING
For Service Technician Use Only
TEST #6: Buons and Indicators
This test is performed when any of the following situaons
occurs during the “Key Acvaon & Encoder Test” (see page
2-5).
ü None of the indicators or display turn on
ü Some buons do not light
ü No beep sound is heard
None of the indicators or display turn on:
1. Unplug dryer or disconnect power.
2. Remove top panel to access the ACU and HMI.
3. Visually check that ALL ACU connectors are inserted all
the way into the ACU.
4. Visually check that ALL HMI connectors are inserted all the
way into the HMI.
5. Visually check that the HMI and housing assembly is
properly inserted into the front console.
6. If all visual checks pass, perform TEST #1: ACU Power
Check, page 3-8, to verify supply voltages.
¾ If supply voltages are present, replace the HMI and
housing assembly.
¾ If supply voltages are not present, replace the ACU.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
9. Perform the “Key Acvaon & Encoder Test” (see page
2-5) to verify repair.
Some buttons do not light:
1. Unplug dryer or disconnect power.
2. Remove top panel to access the ACU and HMI.
3. Visually check that the HMI and housing assembly is
properly inserted into the front console.
4. If visual check passes, replace the HMI and housing
assembly.
5. Reassemble all parts and panels.
6. Plug in dryer or reconnect power.
7. Perform the “Key Acvaon & Encoder Test” (see page
2-5) to verify repair.
No beep sound is heard (on some models, only the
Normal cycle beeps upon cycle selection):
1. On some models, verify that the “Cycle Signal” volume
is turned on. (Procedure varies by model; refer to Use &
Care Guide for specic instrucons to adjust cycle signal.)
2. Unplug dryer or disconnect power.
3. Remove top panel to access the ACU and HMI.
4. Visually check that ALL ACU connectors are inserted all
the way into the ACU.
5. Visually check that ALL HMI connectors are inserted all the
way into the HMI.
6. If all visual checks pass, replace the HMI and housing
assembly.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
9. Perform the “Key Acvaon & Encoder Test” (see page
2-5) to verify repair.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Failure to do so can result in death or
electrical shock.
Replace all parts and panels before operating.