Whirlpool M-17, Technical Manual

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For Service Technician Use Only
DIAGNOSTICS AND TROUBLESHOOTING (Cont.)
Whirlpool
®
and KitchenAid
®
Filtration and Maytag
®
24" Microfiltration Dishwashers
n
2-3
Service Diagnostics Cycle Timing
Numeric Display All LEDs on 1 2 3 4 5 (Some
models)
3
6 7
Interval Time 0:01 0:02 Typical: 0:30
Max: 5:00
0:01 Typical: 1:00
Max: 2:09
0:18 Typical: 0:15
Max: 0:24
Typical: 0:20
Max: 0:44
0:01 0:20 0:20 0:20 0:30 0:15 Typical:
30 Max: 4:45
0:15 0:01
Service Test Steps Pause Turn on vent
(Stay on
throughout)
Timed or
Sensed Drain
1
Pause Fill 2.5 L
2
Wash motor
pulses
Fill 0.5 L
2
Fill 0.8 L +
Wash
2
Pause Wash =
Dispenser
(Middle spray
arm)
Wash = Fan
(Ceiling spray
arm)
Wash (Third
Level Rack
3
)
Wash +
Heater (Lower
spray arm)
Wash + Drain Sensed Drain
1
Drain Pause
Typical Total Time 4:59
NOTES:
1.
Time varies depending on drain sensing.
2. Time varies depending on fill rate sensed by flow meter.
3. This interval is only included on models with a wash arm in the third level rack.
4. Cycle times out after 5 minutes.
Activating Service Diagnostics Mode
To invoke the Service Diagnostics Mode, perform the following while in standby:
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Press any 3 keys (except Delay, Start or Cancel) in the sequence 1-2-3, 1-2-3, 1-2-3 with no more than 1 second between key
presses. All LED's will illuminate if successful. Then press button #2 and shut door to start the service cycle.
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The Service Diagnostics Cycle will start when the door is closed.
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Invoking Service Diagnostics clears all status and last run information from memory and restores defaults. It also forces the next
cycle to be a sensor calibration cycle.
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Sensor calibration cycle may add an extra rinse (to assure clear water) before the final rinse. This cycle may be longer than a
typical run.
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All LEDs turn on immediately upon receiving entry sequence (even if door is open) as a display test. A tone may play depending
on the model.
Press Key #1: User Interface Test
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All LEDs remain on. Tone is played for each key pressed.
Press Key #2: Run Service Test Cycle
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To rapid advance 1 step at a time, press the Start/Resume key. Rapid advance may skip some sensor checks and prevent fault
detection from working properly. Rapid advance can also cause false error codes to be detected in some cases.
NOTE: The diagnostics cycle will pause when the door is opened and resume when closed. No Start/Resume key press required to
resume.
Press Key #3: Error Code History Display
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Up to 5 unique codes are saved in the history.
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Most recently detected error code is displayed first.
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If no faults are present, numeric display will show "-:--" or Clean LED will be off (Depending on display type).
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Press third key to advance to next error code stored. Three tones are played when the end of the error code history has been
reached.
Press and Hold Key #3: Clear Fault History
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Tone will play when faults are cleared Exit procedure.
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The service diagnostics mode will timeout after 5 minutes of user inactivity.
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Press Cancel key to exit service diagnostics mode.
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Service diagnostics mode will be canceled if AC power is removed from the appliance.
Service Diagnostics Mode Menu Table
Types of Button Press 1st Button 2nd Button 3rd Button
Momentary Press Activates User Interface Test Activates Service Test Cycle Displays Next Error Code
Hold for 5 seconds Clears Error Code History
Service Diagnostics Cycle Notes
1. Drain may be sensed or timed. Sensed drain maximum time is approximately 5 minutes, which includes retries. Sensed drain will
have both wash motor and drain motor powered simultaneously. Timed drain is drain motor only.
2. Fills are measured by flow meter and time may vary according to water flow rate. If flow meter has failed, control will revert to timed
fills and record fault code to history. Wash motor may turn on during fill process to verify the presence of water in the machine.
3. This step is only included on models that have a wash zone in the third level rack. On models without a third level wash zone or two
racks, this step is skipped.
Reading Fault Code Display
Point LED Models
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Each fault code is displayed by blinking the Clean or Complete LED in a pattern to indicate the Function code and the Error code.
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Fault display is a 4 step process. Count LED blinks for each portion of the code.
1. Blink Clean or Complete LED Function code number of times
2. Pause 2 seconds
3. Blink Clean or Complete LED Error code number of times
4.
Pause 5 seconds
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Each fault code is repeated until key #3 is pressed to advance to the next code or until the service mode is exited.
Numeric Display Models
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Each fault code is shown in the numeric display by first showing the Function code "F#" then the Error code "E#".
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Fault display is a 4 step process:
1. Display F#
2. Pause 0.5 seconds
3. Display E#
4.
Pause 1 second
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Each fault code is repeated until key #3 is pressed to advance to the next code or until the service mode is exited.