Service Diagnostic Cycle Notes; Diagnostic Guide - KitchenAid KUDE20FB*0 Technical Education

Service Diagnostic Cycle Notes

1. To invoke the diagnostics cycle, perform the following key
presses while in standby.
• Press any 3 keys in the sequence 1-2-3, 1-2-3, 1-2-3
with no more than 1 second between key presses.
• The Service Diagnostic Cycle will start when the door
is closed.
• To rapid advance 1 interval at a time, press the START/
RESUME key. Rapid Advancing may skip sensor checks
as some checks require two complete intervals.
NOTE: While in the Diagnostic cycle, the START/
RESUME feature is turned off (i.e., auto resume after
door interrupts) START/RESUME key serves as interval
advance key.
• Invoking Service Diagnostics clears all status and last
ran information from memory and restores defaults.
It also forces the next cycle to be a sensor calibration
cycle.
• Last Ran Cycle and Options returned to default
(Normal Cycle with Heated Dry Option).
• Last Ran Delay returns to lowest delay increment.
• Calibration Cycle may force an extra rinse to occur
prior to final rinse (to assure clear water), then
calibrates the OWI and the Fill amount during the
final rinse.
• Operating state returns to standby upon completing
or terminating the service diagnostics cycle.
2. Tun on all LED's immediately upon receiving the entry
sequence (even if door is open) and throughout this first
interval as a display test.
3. Diverter will be on continuously in Interval 14. In all other
diverter intervals, diverter will only be on until it reaches
the intended position for that interval.
4. Press HI TEMP key in this interval to clear customer error
history.
5. Thermistor (Temperature Sensor) checks — turn Clean
LED on if thermistor is in its normal temperature range
(32° F to 167° F); turn Sanitized LED on if Fill temperature
is above 85° F.
6. O.W.I. (Optical Soil Sensor/Optical Water Indicator) checks
• OWI Sensor for the presence of water during the 5
second pause in Interval 16 and turns on the Clean
LED in Interval 15 if water detected.
• OWI Sensor for presence of bulk soil during Pause
Interval 13 and turns on the Clean LED in Interval 12 if
bulk soil detected.
• Drain until OWI sensor sees the presence of air or a
maximum of 1:52 during Intervals 5 and turns on the
Clean LED in Interval 4 if air detected.
7. DC fan motor is on during upper rack washing intervals.
8. Turn off all LED's during pause prior to displaying error
codes.
9. Pause to allow for cold first Fill detection.
10. Lower Spray Arm (LSA) models identified by finger-shaped
sensor in tub, protruding from bottom left side of sump.
Check for LSA motor and sensor during Interval 10 per detail
below or look for error code (F9E4) at end of service cycle.
For Service Technician Use Only
DIAGNOSTICS & TROUBLESHOOTING
Interval 10 (4 Min. Lower Wash) Diagnostic Details:
NOTE: Lower Spray Arm (LSA) motor and sensor status
indication given during 3rd and 4th minute of Interval 10.
(Only available on certain models.)
Minute 1: LSA Rotates CCW
Minute 2: LSA Rotates CW
Minute 3: LSA Rotates CCW
¾ Clean LED lit to indicate LSA motor status good.
Minute 4: LSA Rotates CW
¾ Clean LED lit to indicate LSA sensor status good.
NOTE: Inoperable LSA motor will also cause LSA sensor to
indicate bad status (F9E4). See error code table to diagnose.
Interval 3: LSA moves to home position after drain completes.
Home position = LSA roughly 5 clockwise from 12 O'clock.

Diagnostic Guide

Before servicing, check the following:
■ If applicable, make sure there is power at the wall outlet.
■ Has a household fuse blown or circuit breaker tripped?
■ Is the water supply turned on?
■ Are the drain 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 dishwasher
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.
KitchenAid 2013 Stainless Steel Tall Tub Dishwasher 5-5
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