Diagnostic Guide; Activating Service Diagnostic Mode; Service Diagnostic Menu - Whirlpool Duet Documentation Technique

FOR SERVICE TECHNICIAN'S USE ONLY
ABBREVIATIONS
CCU: Central Control Unit
IF: Interference Filter
MCU: Motor Control Unit
UI: User Interface (center/modifier PCBs
& housing)

DIAGNOSTIC GUIDE

Before servicing, check the following:

Make sure there is power at the wall outlet.

Has a household fuse blown or circuit breaker
tripped? Was a regular fuse used? Inform
customer that a time-delay fuse is required.
 Are both hot and cold water faucets open
and water supply hoses unobstructed?

All tests/checks should be made with a
VOM (volt-ohm-milliammeter) or DVM
(digital-voltmeter) having a sensitivity of
20,000 Ω per volt DC or greater.

Resistance checks must be made with
washer unplugged or power disconnected.

IMPORTANT: Avoid using large
diameter probes when checking harness
connectors as the probes may damage
the connectors upon insertion.

Check all harnesses and connections
before replacing components. Look for
connectors not fully seated, broken or
loose wires and terminals, pin insertion,
or wires not pressed into connectors
far enough to engage metal barbs.

A potential cause of a control not
functioning is corrosion or contamination on
connections. Use an ohmmeter to check for
continuity across suspected connections.
Button Press
1st Button - Momentary press
- Press and hold for 5 secs.
2nd Button - Momentary press
- Press and hold for 5 secs.
3rd Button - Momentary press
- Press and hold for 5 secs.
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SERVICE DIAGNOSTIC MENU

SERVICE DIAGNOSTIC MODE
These tests allow service personnel to test
and verify all inputs to the machine control
electronics. You may want to do a quick and
overall checkup of the washer with these tests
before going to specific troubleshooting tests.

ACTIVATING SERVICE DIAGNOSTIC MODE

1. Be sure the washer is in standby mode
(plugged in with all indicators off).
2. Select any three (3) buttons (except
POWER) and follow the steps below, using
the same buttons. Remember the buttons
and the order that the buttons were pressed.
Within 8 seconds,
• Press and Release the 1st selected button,
• Press and Release the 2nd selected button,
• Press and Release the 3rd selected button;
• Repeat this 3 button sequence 2 more times.
3. If the Service Diagnostic mode has
been entered successfully, all indicators on
the console are illuminated for 5 seconds
with "888" showing in the Estimated Time
Remaining seven-segment display. If there
are no saved fault codes, all indicators on the
console will momentarily turn off, and then
only the seven-segment display will come
back on and display "888".
NOTE: The Service Diagnostic mode will time
out after 5 minutes of user inactivity, or shut
down if AC power is removed.
Function Behavior
- Activates User Interface Test
- Exits Service Diagnostic Mode
- Activates Quick Diagnostic Test
- Software Version Display
- Displays Next Error Code
- Clears the Error Codes
DO NOT REMOVE OR DESTROY