Whirlpool W11499711 24 Inch Microfiltration Dishwashers Instruction Manual

Whirlpool W11499711 24 Inch Microfiltration Dishwashers

Product Information

Specifications

• Model: Mulmedia Enhanced
• Technical Manual: W11499711 Rev B

Foreword

Whirlpool Corporation assumes no responsibility for any repairs made on our products by anyone other than authorized In-Home Service Professionals.

General Information

Section 1: General Information

This section provides general safety, parts, and information for:

• Dishwasher Safety
• General Theory of Operation
• New Components/Features
• Model Number and Serial Number Label location
• Tech Sheet Location
• Model Number Nomenclature
• Product Specifications
• Product Features

Dishwasher Safety

Your safety and the safety of others are very important. We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages.

This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the safety alert symbol and either the word DANGER or WARNING. These words mean:

DANGER: You can be killed or seriously injured if you don’t immediately follow instructions.

WARNING: You can be killed or seriously injured if you don’t follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what can happen if the instructions are not followed.

Important Safety Instructions

WARNING: When using the dishwasher, follow basic precautions, including the following:

• Read all instructions before using the dishwasher.
• Use the dishwasher only for its intended function.
• Use only detergents or rinse agents recommended for use in a dishwasher, and keep them out of the reach of children.
• When loading items to be washed:
  1. Locate sharp items so that they are not likely to damage the door seal; and
  2. Load sharp knives with the handles up to reduce the risk of cut-type injuries.
• Do not wash plastic items unless they are marked dishwasher safe or the equivalent. For plastic items not so marked, check the manufacturer’s recommendations.
• Do not touch the heating element during or immediately after use.
• Do not operate the dishwasher unless all enclosure panels are properly in place.
• Do not tamper with controls.
• Do not abuse, sit on, or stand on the door, lid, or dish racks of the dishwasher.
• Do not use replacement parts that have not been recommended by the manufacturer (e.g. parts made at home using a 3D printer).
• To reduce the risk of injury, do not allow children to play in or on the dishwasher.
• Under certain conditions, hydrogen gas may be produced in a hot water system that has not been used for two weeks or more. HYDROGEN
• GAS IS EXPLOSIVE. If the hot water system has not been used for such a period, before using the dishwasher turn on all hot water faucets and let the water flow from each for several minutes. This will release any accumulated hydrogen gas. As the gas is flammable, do not smoke or use an open flame during this time.

Frequently Asked Questions

Q: Can I use any detergent in the dishwasher?

A: No, you should only use detergents or rinse agents recommended for use in a dishwasher. Using other detergents may damage the dishwasher or affect its performance.

Q: How should I load sharp items in the dishwasher?

A: Sharp items should be located in a way that they are not likely to damage the door seal. Additionally, load sharp knives with the handles up to reduce the risk of cut-type injuries.

Q: Can I wash plastic items in the dishwasher?

A: You should only wash plastic items that are marked as dishwasher safe or follow the manufacturer’s recommendations for plastic items that are not marked as dishwasher safe.

Q: Can I use replacement parts that are not recommended by the manufacturer?

A: No, it is not recommended to use replacement parts that have not been recommended by the manufacturer. Using non-recommended parts may affect the performance and safety of the dishwasher.

Mulmedia Enhanced
TECHNICAL MANUAL
KitchenAid® and Maytag® 24″ Microfiltration Dishwashers
W11499711 Rev B

FOREWORD
This Technical Manual (Part No. W11499711 Rev B), provides the In-Home Service Professional with service information for the “KitchenAid® and Maytag® 24″ Microfiltration Dishwashers” For specific operating information on the model being serviced, refer to the “Owner’s Manual” and “Quick Start Guide” provided with the dishwasher. The Wiring Diagram used in this Technical Manual is typical and should be used for training purposes only. Always use the Wiring Diagram supplied with the product when servicing the dishwasher. For specific operating and installation information on the model being serviced, refer to the literature provided with the dishwasher.
GOALS AND OBJECTIVES
This Technical Manual provides information that will enable the In-Home Service Professional to properly diagnose malfunctions and repair the “KitchenAid® and Maytag® 24″ Microfiltration Dishwashers.” The objectives of this Technical Manual are to:
· Understand and follow proper safety precautions. · Successfully troubleshoot and diagnose malfunctions. · Successfully perform necessary repairs. · Successfully return the dishwasher to its proper operational status.
WHIRLPOOL CORPORATION assumes no responsibility for any repairs made on our products by anyone other than authorized In-Home Service Professionals.
©2022 Whirlpool Corporation. Benton Harbor, MI 49022 ii n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n iii

Notes
iv n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

GENERAL INFORMATION

\Section 1: General Information
This section provides general safety, parts, and information for
the “KitchenAid® and Maytag® 24″ Microfiltration Dishwashers.”
n Dishwasher Safety n General Theory of Operation n New Components/Features n Model Number and Serial Number Label location n Tech Sheet Location n Model Number Nomenclature n Product Specifications n Product Features
· KitchenAid® Cycle Guide · Maytag® Cycle Guide
KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 1-1

GENERAL INFORMATION (CONT.)
Dishwasher Safety

Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages.

This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the safety alert symbol and either the word “DANGER” or “WARNING.” These words mean:

DANGER

You can be killed or seriously injured if you don’t immediately follow instructions.

WARNING

You can be killed or seriously injured if you don’t follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what can happen if the instructions are not followed.

IMPORTANT SAFETY INSTRUCTIONS

WARNING: When using the dishwasher, follow basic precautions, including the following:

Read all instructions before using the dishwasher.
Use the dishwasher only for its intended function.
Use only detergents or rinse agents recommended for use in a dishwasher, and keep them out of the reach of children.
When loading items to be washed:

1. Locate sharp items so that they are not likely to damage the door seal; and
2. Load sharp knives with the handles up to reduce the risk of cut-type injuries.
   Do not wash plastic items unless they are marked “dishwasher safe” or the equivalent. For plastic items not so marked, check the manufacturer’s recommendations.
   Do not touch the heating element during or immediately after use.
   Do not operate the dishwasher unless all enclosure panels are properly in place.

Do not tamper with controls.
Do not abuse, sit on, or stand on the door, lid, or dish racks of the dishwasher.
Do not use replacement parts that have not been recommended by the manufacturer (e.g. parts made at home using a 3D printer).
To reduce the risk of injury, do not allow children to play in or on the dishwasher.
Under certain conditions, hydrogen gas may be produced in a hot water system that has not been used for two weeks or more. HYDROGEN GAS IS EXPLOSIVE. If the hot water system has not been used for such a period, before using the dishwasher turn on all hot water faucets and let the water flow from each for several minutes. This will release any accumulated hydrogen gas. As the gas is flammable, do not smoke or use an open flame during this time.
Remove the door or lid to the washing compartment when removing an old dishwasher from service or discarding it.

SAVE THESE INSTRUCTIONS

1-2 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

GENERAL INFORMATION (CONT.)

General Theory of Operation

KitchenAid® Microfiltration Wash System
No Filter Cup, No Chopper
The industry’s first microfiltration system is a clear departure from traditional, passive filtration because it continuously filters 100% of the water, reducing the cycle time and energy consumption on the heaviest loads. Similar on the Surface, Radically Different Inside The only visible filtration component of the new filtration system is the coarse filter in the bottom of the tub. The rest of the highperformance filtration system is below the tub.
How Microfiltration Works
1. Water and food particles flow through the coarse filter into the filter housing.

2. An impeller pulls wash and rinse water into the spinning ultra-fine filter.
A
B

A. Outer blades B. Inner Blades
3. The ultra-fine filter is cleaned by an area of back-pressure created by two sets of wing-shaped blades located inside and outside the filter.
4. Food particles remain suspended inside the filter housing; filtered water is pumped back to the wash arms.
5. During draining, a secondary pump flushes out food particles and soils.

Impeller

Wash Motor

Dirty Water Enters
Food Soils Flushed Out
Wash Flow Drain Flow

Drain Motor

Area of Back Pressure

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 1-3

GENERAL INFORMATION (CONT.)
New Components/Features
n Tub – Taller tub for the largest place setting on the market. Less room underneath the unit to access components for service. n TLR – Third level rack option with it’s own wash system. n Rear feed tube with four wash zones. n Spray Arms – It has new attachment method and comes with compressed size. n Four Legs – Made of plastic similar to dryer legs. n Improved anchoring – Four anchor locations in top tub collar to top mount the dishwasher under the counter-top. n New small screw head on anchor screws to fit into smaller side anchor holes in side of tub collar. n Diverter motor – The function of leak detection alerts the customer to call service. n New installation/service cycle can be activated after the installation to test the leaks for approximately 5 minutes. n H2O error code alarm activates if the installer forgets to turn on the water valve. n Improved diagnostics – Diagnose with more faults/error codes, some will be displayed to customers. n Flood/Water leak detection – Drip tray and float are present to catch leaks from under the tub lip or corners. Leak detection shuts
unit off and turns on drain pump and alerts the customer to call service. n Flow meter – It measures fill against time. n Tub LED’s – Bar LED’s incorporated into Third Level Rack support. n Terminal box – New terminal box comes with screws. No wire nuts are present in terminal box.
1-4 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

GENERAL INFORMATION (CONT.)
Model Number and Serial Number Label Location
Model Number and Serial Number Label Locaon

Tech Sheet Location

Tech Sheet Locaon

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 1-5

GENERAL INFORMATION (CONT.)
Model Number Nomenclature
KitchenAid® Model Nomenclature

MODEL NUMBER
INTERNATIONAL SALES OR MARKETING CHANNEL

K D F M 40 4

Brand K = KitchenAid®
Categories D = Dishwasher
Configuration/Fuel F = Front Control P = Pocket Handle T = Top Control

Product Detail M = 2015 System

Feature Pack 40 – 60 = ProScrubTM 70 = ProDryTM
Width 4 = 24 inches
Year Model Introduced K = 2020 L = 2021
Color BS= Black Stainless PS = Gray Stainless PA = Panel-Ready

K BS

1-6 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

GENERAL INFORMATION (CONT.)
Model Number Nomenclature (Continued)
Maytag® Model Nomenclature

MODEL NUMBER
INTERNATIONAL SALES OR MARKETING CHANNEL

MD

B 79 59 S

K

Z

Brand M = Maytag®

Categories D = Dishwasher

Product Type B = Built-In

Feature Package 46 – 89
Console 09 – 49 = Classic 50 – 99 = FID
Tub Material S = 100% Stainless Steel
Year Model Introduced K = 2020 L = 2021 Color B = Black W = White K = Cast Iron Black Z= Fingerprint Resistant Stainless Steel

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 1-7

GENERAL INFORMATION (CONT.)
Product Specifications
KitchenAid® 44 dBA Dishwasher with FreeFlexTM Third Rack Maytag® Top Control Dishwasher with/without Third Level Rack and Dual Power filtration

Dimensions Depth Closed Excluding Handles (IN, inches) Depth Closed Including Handles (IN, inches) Depth With Door Open 90 Degree (IN, inches) Depth (IN, inches) Height (IN, inches) Width (IN, inches) Number of Place Settings (KitchenAid® Models Only) Number of Place Settings (Maytag® Models Only) Description Dishwasher Type Controls Automatic Temperature Controls Control Location Control Type End of Cycle Signal Sensor Status Light Exterior Control Panel Color Door Style Handle Color Handle Material Handle Type Magnetic Door Toe Panel Color True Hold Door Features Decibel Level (dBA) (KitchenAid® Models Only) Decibel Level (dBA) (Maytag® Models Only) Dispensers Number of Wash Levels (KitchenAid® Models Only) Number of Wash Levels (Maytag® Models Only) Rinse Aid Dispenser Level Indicator Sound Package Cycles and Options (KitchenAid® Models Only) Dishwasher Cycle Selections Cycles and Options (Maytag® Models Only) Dishwasher Cycle Selections

241/2 241/2 or 263/4 51 241/2 or 263/4 311/2 or 331/2 237/8 16 14 or 15
Built-In
Yes Front or Hidden Top Tap Touch with Display or Electronic Touch with Display Yes Yes White
Black or White or Gray Flat Gray or White or Black or Stainless Steel Plastic or Metal Long Pocket or Towel Bar or Short Pocket Yes Black or White Yes
44 44 or 47 or 50 Detergent and Rinse Aid 7 5 or 6 Yes Yes
Express Wash, Normal, ProWashTM, Rinse, Tough
Auto, Normal, Quick, PowerBlast, Rinse

1-8 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

GENERAL INFORMATION (CONT.)
Product Specifications (Continued)

Cycles Number of Wash Cycles Options Dishwasher Option Selections
Details Drying System Type
Leak Detect
Number of Racks Number of Wash Arms Rack Material Tub Material Tub Style Wash System Wash System Type Water Filtration Hoses Included Interior Light 2nd Level Rack Adjustable Cushion-Tip Tines Extras (KitchenAid® Models Only)
Extras (Maytag® Models Only)
Fold-Down Tines (KitchenAid® Models Only) Fold-Down Tines (Maytag® Models Only) Glides Style Lower Rack Cushion-Tip Tines Extras
Fold-Down Tines (KitchenAid® Models Only) Fold-Down Tines (Maytag® Models Only) Glides Style Utility Basket (KitchenAid® Models Only)

5

KitchenAid® Models Only

Maytag® Models Only

Top 2 Racks

4 Hour Delay

Extended ProDryTM or Extended Heat Dry Control Lock

4 Hour Delay or 1-24 Hour Delay or

High Temp

2-4-8 Hour Delay

Long Heated Dry

Heated Dry or ProDryTM

Sani Rinse

Hi Temp Wash

Short Heated Dry

Sani Rinse

KitchenAid® Models Only

Maytag® Models Only

Vent Dry or Fan Dry with Heating Element

Vent Dry or Fan Dry with Heating Element

Yes (For KDTM704LPA model only)

Yes (For MDB4949SKZ, MDB4949SKB and MDB4949SKW models only)

3

2 or 3

5

3 or 4

Nylon

Nylon

Stainless Steel

Stainless Steel

Built-in Tall Tub 24″

Built-in Tall Tub 24″

Clean Water Wash

Dual Power Filtration

MicroFilter

Microfilter with chopper

Yes

Yes

Drain Hose

Drain Hose

Yes

NA

2 Position Removable Yes 2 or 4 or 6 Stemware Holders Stainless Steel Wash Arm Stainless Steel Wash Arm Plastic Cup Shelf 1 Row 6 Position No Wheels or Ball Bearings Extended

Yes 1 Cup Shelf (for MDB4949SKZ0, MDB4949SKB0 and MDB4949SKW0 models only) Stainless Steel Wash Arm Sliding Tines (KitchenAid® Models Only) Knife Holder (for KDTM804KPS0 and KDPM804KBS0 models only) 1 Adjustable 1 Fold Down No Wheels or Ball Bearings Extended Yes

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 1-9

GENERAL INFORMATION (CONT.)
Product Specifications (Continued)

Silverware Basket Type Location Covers Culinary Basket (KitchenAid® Models Only) Third Level Rack (KitchenAid® Models Only) Glides Removable Type Third Level Rack (Maytag® Models Only) Glides Removable Type Certifications CEE Tier CUL Energy Rating (kWh/year) Energy Star® Qualified Kosher Consumer Friendly NSF® Certified UL Prop 65 Electrical
Amps Hz Volts

Large In the Rack Basket or Stainless Steel Basket Bottom Rack Yes Yes
SatinGlide Rails or SatinGlide Max Rails Yes Third rack with dual rotating wash tubes
Ball Bearings Yes Third rack with wash tube
Tier I Yes 270 ENERGY STAR® Qualified Yes Yes Yes Standard
15 60 120

1-10 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

KitchenAid® Cycle Guide

GENERAL INFORMATION (CONT.)
Product Features

Control ProWash Tough Normal
Light Express Wash Rinse Only

CYCLE Purpose Senses soil to automatically optimize cycle. ProWashTM cycle is selected if START is pressed first. Use for hard to clean items. This cycle is recommended for daily, regular or typical use to completely wash and dry a full load of normally soiled dishes. This dishwasher’s government energy certifications were based on the Normal cycle with only the Heated Dry option selected. Use for lightly soiled items like china and crystal. Use when you need faster results. Use for rinsing dishes, glasses, and silverware that will not be washed right away. Do not use detergent.

Control Hi Temp Wash Sani Rinse
Heated Dry Extended ProDry Top 2 Racks Delay Start / Resume Cancel / Drain

OPTIONS Purpose Helps remove tough, baked on food. Sanitizes dishes and glassware in accordance with NSF International NSF/ANSI Standard 184 for Residential Dishwashers. See this section in the Owner’s Manual. Dries dishes with heat. Load plastic item in upper racks. Increases the energy used for drying the dishes. This may lengthen the cycle time. Dries dishes with heat and a fan. Use for best performance. Wash items in the top two racks only. Only a limited amount of water will be sent to the lower spray arm. Runs the dishwasher at a later time. Push to start or resume a cycle. Push to reset any cycle or options during selection. Push to end a cycle once started.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 1-11

GENERAL INFORMATION
Product Features (Continued)
Maytag® Cycle Guide

Control Auto PowerBlast Normal
Quick Rinse

CYCLE Purpose Senses soil to automatically optimize cycle. Auto cycle is selected if START is pressed first. Use for hard to clean items. This cycle is recommended for daily, regular or typical use to completely wash and dry a full load of normally soiled dishes. This dishwasher’s government energy certifications were based on the Normal cycle with only the Heated Dry option selected. Use when you need faster results. Use for rinsing dishes, glasses, and silverware that will not be washed right away. Do not use detergent.

Control High Temp Sani Rinse
Heated Dry Short (Some Models) Power Dry Short Heated Dry Long (Some Models) Power Dry Long Delay Start / Resume Cancel / Drain Control Lock (on some models)

OPTIONS Purpose Helps remove tough, baked on food. Sanitizes dishes and glassware in accordance with NSF International NSF/ANSI Standard 184 for Residential Dishwashers. See this section in the Owner’s Manual. Dries dishes with heat. Load plastic item in upper racks. Dries dishes with heat and a fan. Load plastic item in upper racks.
Increases the Energy used for drying the dishes. This may lengthen the cycle time.
Runs the dishwasher at a later time. Push to start or resume a cycle. Push to reset any cycle or options during selection. Push to end a cycle once started. Use the Control Lock option to avoid unintended use of dishwasher between cycles, or cycle and option changes during a cycle. To turn ON/OFF, hold button for 3 seconds.

1-12 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

Mulmedia Enhanced

DIAGNOSTICS AND TROUBLESHOOTING

Section 2: Diagnostics and Troubleshooting
This section provides diagnostic, fault codes, and troubleshooting
information for the “KitchenAid® and Maytag® 24″
Microfiltration Dishwashers.” n Safety
n Service Diagnostics Cycle Timing
n Activating Service Diagnostics Mode
n Service Diagnostics Cycle Notes
n Service Diagnostics Mode Menu Table
n Service Error Codes
n Troubleshooting Guide

Video Available Look for this ICON through out Section 2. KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-1

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only Safety

DANGER

WARNING

Electrical Shock Hazard
Only authorized technicians should perform diagnostic voltage measurements.
After performing voltage measurements, disconnect power before servicing.
Failure to follow these instructions can result in death or electrical shock.

Electrical Shock Hazard Disconnect power before servicing.
Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

Voltage Measurement Safety Information
When performing live voltage measurements, you must do the following: Verify the controls are in the off position so that the appliance does not start when energized. Allow enough space to perform the voltage measurements without obstructions. Keep other people a safe distance away from the appliance to prevent potential injury. Always use the proper testing equipment. After voltage measurements, always disconnect power before servicing.

IMPORTANT: Electrostatic Discharge (ESD) Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.
Use an antistatic wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance -ORTouch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.
Before removing the part from its package, touch the antistatic bag to a green ground connection point or unpainted metal in the appliance.
Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.
When repackaging failed electronic control assembly in antistatic bag, observe above instructions.

IMPORTANT SAFETY NOTICE — “For Technicians only” This service data sheet is intended for use by persons having electrical, electronic, and mechanical experience and knowledge at a level generally considered acceptable in the appliance repair trade. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible, nor assume any liability for injury or damage of any kind arising from the use of this data sheet.

2-2 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

Numeric Display Interval Time Service Test Steps

All LEDs on 0:01
Pause

0:02 Vent opens

1
Typical: 0:30 Max: 5:00
Drain pump1

0:01 Pause

Typical: 1:00

0:18

Max: 2:09

Fill valve Wash motor 1st fill 2.5 Liter²

For Service Technician Use Only Service Diagnostics Cycle Timing

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)

2

3

4

5 (Some models) 3

6

7

Typical: 0:15 Max: 0:24 Fill valve fill 0.5 Liters2

Typical: 0:20 Max: 0:44 Fill valve fill 0.8 Liters wash start2

0:01 Pause

0:20 Wash continues +dispenser activates+ Middle spray arm in motion

0:20 Wash continues+ Fan activates+ Ceiling spray arm in motion

0:20 Only TLR models Ohio or Michigan rack is in motion activated3

0:30 Wash continues +Heater turns on +Lower spray arm in motion

0:15

Typical:

30 Max: 4:45

Wash continues Drain Pump1 +Drain pump

0:15 Drain

Typical Total Time

0:01 Pause
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.

Components and circuits in the test steps:
· Vent – Visual Observation · Drain pump – Drain motor · Fill valve – Fill · Wash motor – Motor · Dispenser – Dispenser · Fan – DC Fan Motor · Heater – Water heating/Heat dry

Diverter Motor and Position Optical Sensor
Middle spray arm Ceiling spray arm Third level rack (Only TLR Models) Lower spray arm NOTE: Refer to Component Testing for testing.

Use clear door for observations: Kit number: W11179175

Activating Service Diagnostics Mode

Service Diagnostics Cycle Notes

To invoke the Service Diagnostics Mode, perform the following while in standby: n 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. n The Service Diagnostics Cycle will start when the door is closed. n 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. n 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. n 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
n All LEDs remain on. Tone is played for each key pressed.
Press Key #2: Run Service Test Cycle
n 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 n Up to 5 unique codes are saved in the history. n Most recently detected error code is displayed first. n If no faults are present, numeric display will show “-:–” or Clean LED will be off (Depending on display type). n 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 n Tone will play when faults are cleared Exit procedure. n The service diagnostics mode will timeout after 5 minutes of user inactivity. n Press Cancel key to exit service diagnostics mode. n Service diagnostics mode will be canceled if AC power is removed from the appliance.

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 n Each fault code is displayed by blinking the Clean or Complete LED in a pattern to indicate the Function code and the Error code n 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. n 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 n Each fault code is shown in the numeric display by first showing the Function code “F#” then the Error code “E#.” n Fault display is a 4 step process: 1. Display F# 2. Pause 0.5 seconds 3. Display E# 4. Pause 1 second. n Each fault code is repeated until key #3 is pressed to advance to the next code or until the service mode is exited.

Service Diagnostics Mode Menu Table

Types of Button Press Momentary Press Hold for 5 seconds

1st Button Activates User Interface Test

2nd Button Activates Service Test Cycle

3rd Button Displays Next Error Code Clears Error Code History

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-3

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only Service Error Codes

DANGER

Fault codes are intended to give direction as to which component or subsystem has a failure. Service technician should troubleshoot the issue and confirm the validity of all fault codes before replacing parts.

Electrical Shock Hazard
Only authorized technicians should perform diagnostic voltage measurements.
After performing voltage measurements, disconnect power before servicing.
Failure to follow these instructions can result in death or electrical shock.

NOTE: *These fault codes have advanced sensing abilities that provide a high confidence diagnosis. Embedded in the ACU circuit is voltage supply checking and current checking for selected loads. They are developed to provide more accurate detection and scope the particular component failure.

FUNCTION CODE ERROR CODE

1 – Control

1 – ACU 2 – MCU

2 – User Interface 1 – Stuck Key

1 – Open or Shorted 3 – Thermistor/ OWI 2 – Failed Calibration

CAUSES

WHAT TO CHECK

Relay or triac failure on main control Unplug dishwasher or disconnect power and replace

board.

control.

Failure of Motor control on control board.

Unplug dishwasher or disconnect power and replace control.

Control detected stuck keys in user interface. NOTES: If any keys are stuck, the stuck
key(s) will be ignored and an error recorded to service history, but no alert to customer. This fault is monitored on models with key switches only, not on capacitive touch key models.

Check responsiveness of each key. If some keys do not respond, replace user interface. If all keys are responsive, fault may be intermittent or caused by customer use. Check for vent and/or fan fault, which may lead to excessive moisture build up in door cavity and cause keys to appear stuck closed.

Open or shorted connection or

1. Unplug dishwasher or disconnect power.

component in temperature sensing circuit

Check all components and connections in the temperature sensing circuit with meter.

Open, shorted or faulty

Fix/replace open/shorted connection or part.

temperature sensor

3. Verify incoming water temperature.

Temperature sensor input on control failed

Incoming water temperature above 167oF (75oC)

OWI failure

1. Check OWI lens surface. Clean if needed.

OWI lens obstructed by hard water 2. Unplug dishwasher or disconnect power.

build up or food soil

3. Check all connections in soil sensing circuit with

meter. Fix/replace bad connection/part.

NOTE: Run diagnostics cycle after installing new OWI to force calibration on next regular wash cycle.

2-4 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

FUNCTION CODE 4 – Heater*
5 – Door Switch

ERROR CODE 2 – Open, Unplugged, or Failed Relay 3 – Relay Shorted or Heater Failed
1 – Door stuck open
2 – Door stuck closed

Service Error Codes (Continued)

CAUSES

WHAT TO CHECK

Open connection in heater circuit Heater component open Heater drive circuit on control NOTE: Control will continue running cycles with no heat without alerting customer if this fault is detected. Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected.

1. Unplug dishwasher or disconnect power. 2. Measure resistance of heater and all components
and connections in water heating circuit/heat dry circuit. Fix/replace open connection/part.

Heater relay on control shorted Heater component shorted to
ground NOTE: Control will continue running cycles with no heat without alerting customer if this fault is detected. Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected.

1. Unplug dishwasher or disconnect power. 2. Inspect heater and connections for overheating/
shorting. If evidence of overheating or shorts exists, replace. 3. Measure resistance of heater and all components and connections in water heating circuit/heat dry circuit. Fix/replace open connection/part.

Door was not latched within 4 seconds Instruct customer. Refer to Owner’s Manual. of pressing the Start/Resume key.

Loose connection in door switch circuit and/or door switch contacts stuck open and/or door switch not making contact.

1. Check strike plate and door closure force. Verify door seal is seated properly. Check for interference between dish racks and door. Try bending strike plate down for better engagement.

Sloppy door latch assembly (Can 2. Unplug dishwasher or disconnect power.

be aggravated by high door closure 3. Check resistances of door switch contacts and all

force keeping strike plate from

connections in the door switch circuit with meter,

fully seating)

while opening and closing the door latch.

Door switch high resistance

If high resistance with door closed, check/fix loose connections.

4. Measure resistance of door switch contacts while checking mechanical operation of latch assembly. Check for broken plastic pieces on latch assembly. Replace latch if faulty.

If none of the above

1. With door open, verify 13 VDC present across P12-9 and P12-11.
2. If no voltage present, unplug dishwasher or disconnect power and replace control.

Control programmed to not start if it suspects the door switch is stuck closed. Control looks for the door switch to open between cycles. Customer didn’t open the door
between cycles or door switch contacts stuck closed.

1. Open and close the door, select cycle, the press Start/Resume key. If cycle starts, instruct customer to open the door between cycles.
2. Unplug dishwasher or disconnect power. 3. Measure resistances of door switch contacts
while checking mechanical operation of latch assembly. Fix/replace faulty components.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-5

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

FUNCTION CODE 6 – User Interface
7 – Wash Motor*

Service Error Codes (Continued)

ERROR CODE CAUSES

WHAT TO CHECK

1 – No Response from ACU

User interface has power but cannot 1. Unplug dishwasher or disconnect power.

communicate with main control board. 2. Access the control. Look for the LED sequence on

Loose connection between UI and

the control and reference it to the ACU Diagnostic

main control

LED chart in section 3-3. If the LED has a slow

Terminal or wire broken in harness between UI and main control

blinking, the control is working normally and should not be replaced. If the LED is solid on, use the service tool to re-flash setting file. If the

Main control communication

problem persists, continue to step 3.

circuit failed

3. Check connections between P1 on main control

and user interface. Reconnect, repair, or replace

harness.

4. If harness connections are all good, replace main control board.

1 – Wash Motor Failure

Loose connection in motor circuit and/or faulty wash motor. Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected.
Control motor drive circuit or sense circuit Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected.

1. Check operation of wash motor during diagnostics.
2. Unplug dishwasher or disconnect power. 3. Check resistances of connections in wash motor
circuit. 4. Check for loose connections or replace wash
motor.
1. Unplug dishwasher or disconnect power. 2. Check for other fault codes to see if F1E1 is also
recorded. If meter check of wash motor circuit shows normal resistance and still not getting power to the wash motor, replace control only if there is also a F1E1 error code.

4 – RIF Filter Plugged

Clogged filter assembly Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected.

1. Unplug the dishwasher or disconnect power. 2. Check the RIF filter assembly. Clean the filter and
remove any soils from the filter area. Reassemble and reinstall Motor. 3. Verify that the unit is operating with normal motor resistance and voltage in normal operating range. Wash pressures sound strong. Run unit through wash cycle without errors or signs. 4. Run a service diagnostic cycle as last verification. 5. If problem persist, then replace motor and sump assembly. Check for other fault codes to see if F9E1 is also recorded. See F9E1 description.

2-6 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

FUNCTION CODE 8 – Inlet Water

ERROR CODE 1 – No Water / Tap Closed 2 – Fill valve electrical problem

Service Error Codes (Continued)

CAUSES

WHAT TO CHECK

No water to dishwasher

Verify water supply is turned on and supply line adequate. Check for kinked fill hose.

Bowls or pots loaded or flipped upside Instruct customer on loading. Refer to Owner’s

down and captured wash water

Manual.

Water leaking from dishwasher

Check for leaks under dishwasher.

Fill valve or water line plugged with debris

Turn off water supply to dishwasher, disconnect water line to inlet valve and inspect/clean the inlet screen of fill valve and reconnect water line.

Fill valve electrical problem

Check other fault codes to see if F8E2 is also recorded. See F8E2 description below.

Flow meter intermittent or failed

Check other fault codes to see if F8E6 is also recorded. See F8E6 description below.

Loose connection in fill valve circuit and/or open fill valve solenoid

1. Unplug dishwasher or disconnect power. 2. Check resistances of fill valve solenoid and all
connections in the fill circuit with meter. 3. Fix/replace open connection/part.

Open fuse on control to fill valve

Refer to “Fuse Service and Resistance Check” in section 3.

Faulty fill valve drive circuit on control

1. Unplug dishwasher or disconnect power. 2. Check resistances of fill valve solenoid and all
connections in the fill circuit. If all connections and solenoid measure good, replace control.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-7

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

FUNCTION CODE 8 – Inlet Water

ERROR CODE 3 – Very Low Water / Suds / Air in Pump
4 – Overfill switch open

Service Error Codes (Continued)

CAUSES

WHAT TO CHECK

Too many suds

1. Start a cycle, allow unit to fill and wash for 1-2 minutes. Open door and check for excessive sudsing.
2. Confirm using proper dishwasher detergent, not hand detergent.
3. Check for excessive rinse aid leakage. Disconnect power and replace dispenser if rinse aid is leaking.

Bowls or pots loaded or flipped upside Instruct customer on loading. Refer to Owner’s

down and captured wash water

Manual.

Water leaking from dishwasher

Check for leaks under dishwasher.

Diverter disk in sump missing

Remove lower spray arm, rear feedtube, and outlet cover and verify whether the diverter disk is installed.

Damaged Harness

Wire harness and/or connector may have been damaged during installation. Replace if damaged.

Overfill switch unplugged

Remove access panel and inspect overfill switch assembly. Ensure connector is fully seated.

Water in leak pan under unit

Remove access panel and check for water in leak pan. If water present, unplug float switch, remove pan and empty it. Replace pan and reconnect the switch. Press Cancel key twice to remove unit from error mode. Verify that fault code is not re-detected by control. NOTE: Root cause of overfill must be corrected or customer will experience another overfill and service call in the future.

Overfill switch stuck in open/up position

1. Remove access panel and inspect overfill switch assembly and pan for water or obstruction. Verify that Styrofoam float is able to move freely and you hear the “click” of switch contacts when it is down.
2. Unplug dishwasher or disconnect power and check resistance of overfill switch. Switch should be shorted when float is down.

Drain issue

Check other fault codes to see if F9E1 and/or F9E2 have been recorded. See info for these fault codes below.

Fill valve mechanically stuck open

Check other fault codes to see if F8E5 is also recorded. See info for F8E5 below.

Fill valve triac on control shorted

Check other fault codes to see if F1E1 is also recorded. See info for F1E1 above.

Unit not level and water surges down Check levelness of dishwasher. If unit is tilted

overfill funnels into leak pan during forward, water is more likely to enter funnels and fill

cycle

leak pan. Adjust unit until level. Empty leak pan.

Air pressure surges when door is opened and immediately closed while dishwasher is hot can force water droplets down funnels into leak pan.

Instruct customer to leave dishwasher open a few minutes if door is opened when unit is hot. Empty leak pan.

Too many suds

1. Start a cycle, allow unit to fill and wash for 1-2 minutes. Open door and check for excessive sudsing.
2. Confirm using proper dishwasher detergent, not hand detergent.
3. Check for excessive rinse aid leakage. Disconnect power and replace dispenser if rinse aid is leaking.

2-8 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

Service Error Codes (Continued)

FUNCTION CODE ERROR CODE CAUSES

WHAT TO CHECK

5 – Fill valve stuck open* 8 – Inlet Water 6 – Flow meter

9 – Draining (Check electrical loads first, mechanical functions second)

1 – Not draining

Control detects water flowing through flow meter when fill valve is turned off Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected. Fill valve TRIAC on control shorted Advanced Diagnosis: Advanced algorithms have determined more than likely only the fill valve requires replacement if no F1E1 is detected. Disconnected or damaged flow meter NOTE: Control is programmed to default to timed fill sequence if flow meter malfunctions. Intermittent flow meter connection may cause incorrect fill levels or false fault codes to be recorded.
Obstructed drain hose or path Forced error code from clogged RIF filter. Drain pump impeller damaged
Intermittent over heat instance to lock up.
Drain motor electrical problem

Confirm dishwasher fills while door is open. If yes, unplug dishwasher or disconnect power,
turn off water to dishwasher, replace fill valve and turn water back on. If filling stops with door open, but fault is detected while running a cycle, unplug dishwasher or disconnect power and replace control. If dishwasher does not fill with door open, but F8E5 or F1E1 is detected while cycle is running, the fill valve TRIAC is shorted. Disconnect power and replace control.
1. Unplug dishwasher or disconnect power. 2. Check connections to flow meter with meter.
Verify that connector is securely connected at the flow meter end and wires are not pinched/ damaged. Reconnect wires and/or replace damaged components. 3. Inspect water inlet and flow meter for signs of obstruction that prevent flow meter wheel from turning. If wheel does not turn, or turns intermittently, when water is flowing, replace water inlet assembly. 1. Unplug dishwasher or disconnect power. 2. Check for blockages from drain motor to customer’s plumbing. Check for plugged garbage disposal or plug not knocked out, plugged hoses or drain check valve stuck. Check RIF filter assembly for clogging or blockage. 1. Unplug dishwasher or disconnect power. 2. Remove drain pump and check impeller (normally there is some uneven resistance when pushing it). If it is stripped or visibly damaged, replace drain pump. NOTE: In many cases, the pump cools down and will operate again For intermittent pump locking, check the following: Resistance provided in specification. Harness wiring to the pump for continuity. Voltage at the pump. Then remove the drain pump and check for axial play. If the axial play is fine, also check for motor short or open. If all checks are acceptable, change the pump to assume that it has the rare intermittent instance. Replacement parts are not likely to have the same condition. Check other fault codes to see if F9E2 is also recorded. See F9E2 description below.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-9

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

Service Error Codes (Continued)

FUNCTION CODE ERROR CODE CAUSES

WHAT TO CHECK

Wash motor problem 1 – Not draining

1. Check other fault codes to see if F7E1 or F7E4 is also recorded. Control uses wash motor signal to verify drain so a failed wash motor can cause a drain fault to be detected.
2. Check wash motor and filter assembly for proper function.
3. Check motor resistance and voltage are in normal operating range.

9 – Draining (Check electrical loads first, mechanical functions second)

2 – Drain motor electrical problem

Loose connection in drain motor circuit and/or open drain motor winding. Debris stuck in drain motor impeller causing locked rotor Open fuse on control to drain motor

1. Unplug dishwasher or disconnect power. 2. Check resistances of drain motor winding and all
connections in the drain circuit. Fix/replace open connection/part.
1. Unplug dishwasher or disconnect power 2. Remove drain motor and dislodge debris from
impeller. Inspect for damage before reassembling.
Refer to “Fuse Service and Resistance Check” in section 3.

Drain motor drive circuit on control

1. Unplug dishwasher or disconnect power. 2. Check resistances of drain motor winding and all
connections in the drain circuit. If all connections and drain motor winding measure good, replace control.

4 – Light in the tub

Loose connection or open in tub light circuit

1. Unplug dishwasher or disconnect power. 2. Check resistances of tub lights and all connections
in tub light circuit. Fix/replace open connection/ part.

2-10 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

FUNCTION CODE 10 (A) – Other
10 (A) – Other

Service Error Codes (Continued)

ERROR CODE CAUSES

WHAT TO CHECK

Loose connection in dispenser circuit and/or open dispenser solenoid

1. Unplug dishwasher or disconnect power. 2. Check resistances of dispenser solenoid and all
connections in the dispenser circuit. Fix/replace open connection/part.

1 – Dispenser electrical problem

Open fuse on control to dispenser Dispenser drive circuit on control

Refer to “Fuse Service and Resistance Check” in section 3.
1. Unplug dishwasher or disconnect power. 2. Check resistances of dispenser solenoid and
all connections in the dispenser circuit. If all connections and solenoid measure good, replace control.

2 – Vent electrical problem

Loose connection in vent circuit and/or open vent wax motor. Open fuse on control to vent.

1. Clear error codes. Run service cycle test and see if F10E2 reappears. If so, continue to step 2.
2. Unplug dishwasher or disconnect power. 3. Check resistances of vent wax motor and all
connections in the vent circuit. Fix/replace open connection/part.
Refer to “Fuse Service and Resistance Check” in section 3.

Vent drive circuit on control.

1. Unplug dishwasher or disconnect power. 2. Check resistances of vent wax motor and all
connections in the vent circuit. If all connections and wax motor measure good, replace control.

3 – Drying fan electrical problem

Loose connection in fan circuit and/or open fan motor winding. Fan drive circuit on control.

1. Unplug dishwasher or disconnect power. 2. Check resistances of fan motor and all
connections in the fan circuit. Fix/replace open connection/part.
1. Unplug dishwasher or disconnect power. 2. Check resistances of fan motor and all
connections in the fan circuit. If all connections and fan motor measure good, replace control.

Corroded or loose connection in

1. Unplug dishwasher and disconnect power.

4 – Diverter can’t find positions

diverter sensor or motor circuit. Open/ shorted diverter sensor or motor.

Check connections in diverter sensor and motor circuit with meter. Fix/replace connections/parts.

(Position optical

3. Replace the entire sump assembly:

sensor, spray

If any leakage is found or,

arms)

If troubleshooting is not successful or,

If you get an error code.

Corroded or loose connection in diverter sensor circuit.

1. Unplug dishwasher and disconnect power. 2. Check connections in diverter sensor circuit with
meter. Fix/replace connections/parts.

Leak at diverter seal 5 – Diverter leak (Motor)

1. Inspect diverter for evidence of water or contaminants; if yes, replace.
2. Check for residue buildup around the diverter area and connections.
3. Check for a leak or the appearance of error code again while running the service diagnostics cycle.
4. After that, run a quick/normal cycle for 10 minutes or a longer observation time.
5. Replace the entire sump assembly: If any leakage is found or,
If troubleshooting is not successful or,
If you get an error code.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-11

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only Troubleshooting Guide
DANGER

Electrical Shock Hazard
Only authorized technicians should perform diagnostic voltage measurements.
After performing voltage measurements, disconnect power before servicing.
Failure to follow these instructions can result in death or electrical shock.

NOTES:
n For resistance checks, refer to the “Dishwasher Strip Circuits” in Section 3. n For checking operation with diagnostics, refer to “Service Diagnostics Cycle Timing” section.

CUSTOMER DESCRIPTION CLEAN LED Flashes

POTENTIAL CAUSES Control Programmed with Self Diagnostics

CHECK Read error code from the dishwasher and refer to “Service Error Codes” table. Run service diagnostics test cycle to read full history of error codes.

RELATED ERROR CODES
F1E1 F8E1 F8E4 F8E5 F9E1 F10E4 (FAE4)

2-12 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

CUSTOMER DESCRIPTION
Won’t run or power up (“Dead” keypad/console) n No operation n No keypad response n No LEDs or display
Won’t run and Start/Resume LED is blinking slowly Won’t start and Start/Resume LED flashes 3 times when Start/Resume key is pressed Won’t accept key presses and Control Lock LED on
One or more keys won’t respond or unusual key/LED/ display behavior

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

No power to unit or bad connection

Check fuses, circuit breakers, and junction box connections.

Loose connections in dishwasher power up circuit or between keypad(s) and control

1. Unplug dishwasher or disconnect power.
2. Check continuity power connections keypad(s) and control.

User interface on this model is not compatible with control which has been exchanged with a control from another model.

Unplug dishwasher or disconnect power. Verify correct control is installed for this model. Control is specific to each user interface and model type. Call techline to verify part numbers if necessary. If incorrect control, replace.

Control detected door switch problem Refer to “Service Error Codes” table

User interface or control failure

1. Unplug dishwasher or disconnect power.
2. Replace user interface/console and/or control.

By design, if door is opened for more Instruct customer. Refer to Owner’s than 5 seconds or power is interrupted Manual. during a cycle, the user must press Start/ Resume to resume operation.

Start/Resume key not responding

See “One or more keys won’t respond.”

Control detected door switch problem. Refer to “Service Error Codes” table.

Control looking for door to open between cycles: Customer has not opened door since
last cycle Door switch contacts stuck closed

Refer to “Service Error Codes” table.

Control lockout feature accidentally enabled by customer.

Instruct customer. Refer to Owner’s Manual. Press and hold Control Lock key for 5 seconds to disable lockout feature.

Stuck key or short circuits in keypad or in user interface’s input lines that read the keys.

Refer to “Service Error Codes” table

Capacitive touch keypad adhesive coming loose from console.

1. Unplug dishwasher or disconnect power.
2. Inspect keypad board for separation from console. Replace keypad/console if separation is seen.

Loose connections between keypad and control and/or bent connector pins

1. Unplug dishwasher or disconnect power.
2. Inspect connections in user interface circuits. Reconnect loose connections. Replace parts if pins are damaged or contaminated.

Excessive condensation on user interface Check fault code history for vent and/or parts due to vent and/or fan problem fan faults. Refer to “Service Error Codes”
table. Verify that vent closes and fan turns on. Refer to “Leaks or drips on cabinet or floor.”

User interface failure

1. Unplug dishwasher or disconnect power.
2. Replace user interface.

RELATED ERROR CODES
F5E1
F5E1 F5E2
F2E1
F6E1 F10E2 (FAE2) F10E3 (FAE3)

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-13

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

CUSTOMER DESCRIPTION Dishwasher beeps constantly LEDs or displays run for a short time without loads running or wash motor runs without attempt to fill or fan is the only load that runs
Long cycles and/or stuck in certain parts of the cycle

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

RELATED ERROR CODES

User opened door during cycle and closed door without pressing Start/Resume key to resume cycle.

Instruct customer. Control is designed to beep if dishwasher is in “cycle interrupt” mode with door latched. Control will stop beeping when door is open and/or when Start/Resume key is pressed to resume cycle.

Normal beeper operation is excessive to Instruct customer how to turn beeper off

customer.

and on. Refer to Owner’s Manual.

Control is programmed to stop cycle and alert customer when certain fault codes have been detected.

Press Cancel key once to silence alarm during fault mode. Read error code from the dishwasher and refer to “Service Error Codes” table. Use service diagnostics mode to get fault history from appliance.

F1E1 F8E1 F8E4 F8E5 F9E1 F10E4 (FAE4)

Unit is in sales demo mode

Check operation of Cancel key. If pressing cancel multiple times does not activate Cancel/Drain sequence, unit is likely in sales demo mode. To clear demo mode, cycle power for at least 1 minute or run service diagnostics cycle.

Open fuse on control removed power from loads

Refer to “Fuse Service and Resistance Check” in section 3.

As part of normal operation, the

Instruct customer. Explain thermal holds

dishwasher pauses 2 or 3 times during and how the cycle timing pauses when

the cycle for thermal holds and advances they occur.

once temperature is met.

OWI soil sensor picking high soil cycle too often.

1. Check lens surface. Clean if needed. 2. If lens surface cannot be cleaned or
has visible damage, unplug dishwasher or disconnect power. 3. Replace OWI and run diagnostics cycle after installing new OWI to force calibration on next customer wash cycle.

Diverter problem prevents water from Refer to “Service Error Codes” table. heating efficiently.

F10E5 (FAE5)

A water heating problem can cause long Refer to “Service Error Codes” table. cycles, but will typically also cause a water heating fault code.

F4E2 F4E3

Heater takes a long time to heat water Check for at least 100 VAC at power

with low voltage

source.

Incoming water under 84°F (29°C)

1. Ensure dishwasher is connected to the hot water supply.
2. Confirm temperature at sink. Recommended is 120°F (49°C).
3. Unplug dishwasher or disconnect power and check all connections and measure resistance in temperature sensing circuit. Reconnect and/or replace parts.

Suds or air in pump requires repeated wash periods.

Refer to “Service Error Codes” table.

OWI or NTC temperature sensor problem

Refer to “Service Error Codes” table.

F3E1

2-14 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

CUSTOMER DESCRIPTION Can start a cycle but only runs for a short time. Cycle does not complete (Clean or Complete LED may blink). Will not drain or water left in dishwasher
Detergent not dispensing or detergent left in dispense NOTE: Check error history. If no fault for electrical problems, problem is mechanical. Do not replace control.
Film or spots on glasses and/or dishes

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

RELATED ERROR CODES

Control is programmed to stop cycle and alert customer when certain fault codes have been detected.
Unit is in sales demo mode
Draining problem Customer misunderstands water level after drain Clogged RIF filter
Item in lower rack blocked dispenser from opening or blocked spray of water to dispenser. Mechanical binding of dispenser lid Lid latch binding due to excess detergent in mechanism Dispenser electrical problem Control canceled cycle prior to dispensing due to fault detected.

Press Cancel key once to silence alarm during fault mode. Read error code from the dishwasher and refer to “Service Error Codes” table. Use service diagnostics mode to get fault history from appliance.
Check operation of Cancel key. If pressing cancel multiple times does not activate Cancel/Drain sequence, unit is likely in sales demo mode. To clear demo mode, cycle power for at least 1 minute or run service diagnostics cycle. Refer to “Service Error Codes” table.
Instruct customer. Sump will normally have up to an inch of water remaining in filter area after cycle. 1. Unplug dishwasher or disconnect
power. 2. Check RIF filter assembly. Clean
remove any soils from filter area. Reassemble and reinstall Motor. Instruct customer on proper dish loading.
1. Unplug dishwasher or disconnect power.
2. Replace dispenser. Instruct customer on proper dispenser filling. Refer to “Service Error Codes” table. Read error code from the dishwasher and refer to “Service Error Codes” table. Use service diagnostics mode to get fault history from appliance.

F1E1 F8E1 F8E4 F8E5 F9E1 F10E4 (FAE4)
F9E1 F9E2 F7E4 F7E4
F10E1 (FAE1) F1E1 F8E1 F8E4 F8E5 F9E1 F10E4 (FAE4)

Customer not using rinse aid and/or Heated Dry Rinse Aid dispenser problem Hard water leaving film on dishes
Detergent carry-over causing oversudsing

Check rinse aid level in dispenser. Instruct customer how to fill and monitor level of rinse aid. Refer to “Service Error Codes” table. Check water hardness. If hard water present, instruct customer to use dishwasher cleaner per packaging instructions. Also recommend 1 Hour Wash cycle. Rinse aid dosage insufficient for hardness of water. Instruct customer on how to access customer setting menu to increase rinse aid dosage. Refer to Owner’s Manual. Check water hardness. If below 10 grains, instruct customer to use less detergent. Recommend using 1 Hour Wash cycle.

F10E1 (FAE1)

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-15

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

CUSTOMER DESCRIPTION Film or spots on glasses and/or dishes
Poor wash

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

RELATED ERROR CODES

Etching of glass from too much detergent at high temperature

Check water hardness. If below 10 grains, instruct customer to use less detergent. Recommend using 1 Hour Wash cycle.

Diverter problem

Refer to “Service Error Codes” table

F10E5 (FAE5)

Cycle selection of customer not appropriate for dish load

Instruct customer on cycle selection. Recommend “High Temp” option for a wash performance boost.

Dishes not loaded facing nozzles

Instruct customer on proper dish loading and spray arm coverage. Refer to Owner’s Manual.

Plugged or damaged filter

1. Place mugs or glasses upright in the middle and lower dish racks. Run a Normal cycle for 10-15 minutes. Open the door and inspect mugs. If water is accumulating in them, pump is working. If no water is present, water is not being pumped through the spray arms. If no diverter or wash motor fault recorded, filter may be plugged or damaged.
2. Unplug dishwasher or disconnect power.
3. Replace pump/filter assembly.

Little or no wash pump flow

Diverter problem. Refer to “Service Error F10E5 (FAE5) Codes” table.

1. Filter may be plugged with food soil or hard water. Place mugs or glasses upright in the middle and lower dish racks.
2. Run a Normal cycle for 10-15 minutes. Open the door and inspect mugs. If water is accumulating in them, pump is working. If no water is present, water is not being pumped through the spray arms.
3. Inspect pump/filter assembly. If filter is plugged or damaged, unplug dishwasher or disconnect power and replace pump/filter assembly.
4. If hard water is present, instruct customer on proper maintenance.

Spray arms not rotating or plugged

1. Check arm rotation. If arms are blocked by dish item, instruct customer. Also check for correct upper spray arm alignment with docking station located on feed tube at back tub wall.
2. Check nozzles. If they are plugged, clean nozzles. Plugging may be caused by hard water build up in water delivery system or damaged pump filter. Inspect water delivery system and clean as needed. Inspect pump/ filter assembly. Clean or replace.

2-16 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

CUSTOMER DESCRIPTION Poor wash
Poor dry Sanitized LED blinks or incomplete sanitization message at end of cycle (Control could not confirm sanitization achieved)

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

RELATED ERROR CODES

Poor wash due to draining, dispensing and/or temperature problems.

Refer to “Will not drain”, “Detergent not dispensing” or “Long cycles” sections above. Refer to “Service Error Codes” table.

Soil sensor is choosing low soil cycle when high soil is present.

1. Check lens surface. Clean if needed. 2. If sensor cannot be cleaned or has
visible damage, unplug dishwasher or disconnect power. 3. Replace OWI and run diagnostics cycle after installing new OWI to force calibration on next customer wash cycle.

Diverter problem

Refer to “Service Error Codes” table.

Diverter disk in sump is missing

Remove lower spray arm, rear feedtube, and outlet cover and verify whether the diverter disk is installed.

Heating problem

Refer to “Service Error Codes” table.

F4E2 F4E3

Control is programmed to stop cycle and alert customer when certain fault codes have been detected.

1. Press Cancel key once to silence alarm during fault mode.
2. Read error code from the dishwasher and refer to “Service Error Codes” table.
3. Use service diagnostics mode to get fault history from appliance.

F1E1 F8E1 F8E4 F8E5 F9E1 F10E4 (FAE4)

Customer not using rinse aid and/or dispenser empty

Check rinse aid level in dispenser. Instruct customer how to fill and monitor level of rinse aid. Some wetness may be present. Recommend use of rinse aid with Heated Dry or Extended Dry to customer.

Customer not using Heated Dry option

Some wetness may be present. Recommend use of Rinse Aid with Heated Dry or Extended Dry to customer.

Rinse aid dispenser problem

Refer to “Service Error Codes” table.

F10E1 (FAE1)

Fan problem

Refer to “Service Error Codes” table.

F10E3 (FAE3)

Heating problem

Refer to “Service Error Codes” table.

F4E2 F4E3

Control is programmed to stop cycle and alert customer when certain fault codes have been detected.

Press Cancel key once to silence alarm during fault mode. Read error code from the dishwasher and refer to “Service Error Codes” table. Use service diagnostics mode to get fault history from appliance.

F1E1 F8E1 F8E4 F8E5 F9E1 F10E4 (FAE4)

Door opened during final rinse or dry Instruct customer

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-17

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

Troubleshooting Guide (Continued)

CUSTOMER DESCRIPTION

POTENTIAL CAUSES

CHECK

RELATED ERROR CODES

Incoming water under 84°F (29°C)

1. Ensure dishwasher is connected to the hot water supply.
2. Confirm temperature at sink. Recommended is 120°F (49°C).
3. Unplug dishwasher or disconnect power and check all connections and measure resistance in temperature sensing circuit. Reconnect and/or replace parts.

Heating problem

Refer to “Service Error Codes” table.

F4E2 F4E3

Thermistor/OWI sensor problem

Refer to “Service Error Codes” table.

F3E1 F3E2

Sanitized LED blinks or incomplete sanitization message at end of cycle (Control could not confirm sanitization achieved)

Loose or intermittent connection in door switch circuit: Sloppy door latch assembly
(Can be aggravated by high door closure force keeping strike plate from fully seating).

1. Check strike plate and door closure force. Verify door seal is seated properly. Check for interference between dish racks and door. Try bending strike plate down for better engagement.
2. Unplug dishwasher or disconnect power.
3. Check resistances of door switch contacts and all connections in the door switch circuit with meter, while opening and closing the door latch. If high resistance with door closed, check/fix loose connections.
4. Measure resistance of door switch contacts while checking mechanical operation of latch assembly. Check for broken plastic pieces on latch assembly. Replace latch if faulty.

Line voltage too low to heat fast enough Confirm at least 100 VAC at power source. for sanitization

Air pressure surges due to washing with Refer to “Service Error Codes” table.

F8E3

high suds causes brief opening of door

switch contacts during final rinse.

Customer uses non-dishwasher safe dishes or loads plastic dishes directly over heater

Melted dishware and/or spray arm and/or dishwasher always

Temperature sensing problem

hot

Heating problem

Instruct customer.
Refer to “Service Error Codes” table. Refer to “Service Error Codes” table.

F3E1 F4E2 F4E3

Heater displaced from mounting clip and/or pulled off center

Inspect heater. Adjust back into position if needed.

Noisy operation

Spray arm stalled or blocked and spraying on door Diverter problem

Instruct customer if blocked Check spray arm rotation and check
for plugged nozzles. If plugged, clean nozzles and inspect filters. Refer to “Service Error Codes” table.

F10E5 (FAE5)

No or low water

Refer to “Service Error Codes” table.

F8E1 F8E2 F8E3

2-18 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

CUSTOMER DESCRIPTION Noisy operation
Leaks or drips on cabinet or floor Leaks or drips on cabinet or floor

DIAGNOSTICS AND TROUBLESHOOTING (CONT.)
For Service Technician Use Only

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

Drain periods are too long
Loose connection in vent circuit and/or open vent wax motor Open fuse on control to vent wax motor Vent drive circuit on control failed Fan runs (makes noise) after cycle complete (On models with fan) Excessive fan noise due to faulty fan motor (On models with fan)
Loose connection in vent circuit and/or open vent wax motor Open fuse on control to vent wax motor Vent drive circuit on control failed Fan problem Too many suds Leaking dishwasher Unit not level and water surges over front tub lip or down overfill funnels during cycle Air pressure surges when door is opened and immediately closed while dishwasher is hot can force water droplets out vent duct or down funnels into leak pan.

Control is programmed to run drain until complete. Long or partially obstructed drain hose may cause long drain periods. Run Service cycle and verify that drain is completed in approximately 1 minute. If drain is long, inspect drain path from dishwasher to customer’s plumbing for issues. Unplug dishwasher or disconnect power and check resistances of vent wax motor and all connections in vent circuit. Fix/replace open connections/part. Refer to “Fuse Service and Resistance Check” in section 3. Unplug dishwasher or disconnect power and check resistances of vent wax motor and all connections in vent circuit. Fix/ replace open connections/part. Dishwasher is designed to keep fan running after cycle to prevent moisture build up in dishwasher. Fan will turn off if door opened longer than 5 seconds. Instruct customer. 1. Check fan operation during Service
cycle. 2. Unplug dishwasher or disconnect
power. 3. Check resistances of fan motor and all
connections in fan circuit. Fix/replace open connections/part. Unplug dishwasher or disconnect power and check resistances of vent wax motor and all connections in vent circuit. Fix/ replace open connections/part. Refer to “Fuse Service and Resistance Check” in section 3. Unplug dishwasher or disconnect power and check resistances of vent wax motor and all connections in vent circuit. Fix/ replace open connections/part. Refer to “Service Error Codes” table. Refer to “Service Error Codes” table. Check door/tub gasket and all water connections below dishwasher. Refer to “Service Error Codes” table. Check levelness of dishwasher. If unit is tilted forward, water is more likely to enter funnels and fill leak pan. Adjust unit until level. Inspect leak pan and empty if needed. Instruct customer to leave dishwasher open a few minutes if door is opened when unit is hot. Inspect leak pan and empty if needed.

RELATED ERROR CODES
F10E2 (FAE2)
F10E2 (FAE2)
F10E3 (FAE3) F8E3 F8E4 F8E4 F8E4

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 2-19

DIAGNOSTICS AND TROUBLESHOOTING
For Service Technician Use Only

CUSTOMER DESCRIPTION Leaks or drips on cabinet or floor

Troubleshooting Guide (Continued)

POTENTIAL CAUSES

CHECK

Air pressure surges when door is opened and immediately closed while dishwasher is hot can force water droplets out vent duct or down funnels into leak pan.

Recommend use of rinse aid with Heated Dry or Extended Dry to customer.

RELATED ERROR CODES

2-20 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING

Section 3: Component Testing
This section provides the component location for the
“KitchenAid® and Maytag® 24″ Microfiltration Dishwashers.
n Safety n Service Tool Connection Location n Control Board Information n Component Testing n Component Location
KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-1

COMPONENT TESTING (CONT.)
For Service Technician Use Only

Safety

DANGER

WARNING

Electrical Shock Hazard
Only authorized technicians should perform diagnostic voltage measurements.
After performing voltage measurements, disconnect power before servicing.
Failure to follow these instructions can result in death or electrical shock.

Electrical Shock Hazard Disconnect power before servicing.
Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

Voltage Measurement Safety Information
When performing live voltage measurements, you must do the following: Verify the controls are in the off position so that the appliance does not start when energized. Allow enough space to perform the voltage measurements without obstructions. Keep other people a safe distance away from the appliance to prevent potential injury. Always use the proper testing equipment. After voltage measurements, always disconnect power before servicing.

IMPORTANT: Electrostatic Discharge (ESD) Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress.
Use an antistatic wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance -ORTouch your finger repeatedly to a green ground connection point or unpainted metal in the appliance.
Before removing the part from its package, touch the antistatic bag to a green ground connection point or unpainted metal in the appliance.
Avoid touching electronic parts or terminal contacts; handle electronic control assembly by edges only.
When repackaging failed electronic control assembly in antistatic bag, observe above instructions.

3-2 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)
For Service Technician Use Only

DANGER

DW03G WIN Port Location 2023+
The products produced from 2023, will have a WIN Port located behind the toe panel or access cover. Follow all instructions in Technical Manual, W11509149. Remove the toe panel or access cover. Using the Blue Service Tool Wire assembly, connect the Service Tool to the WIN Port.

Electrical Shock Hazard
Only authorized technicians should perform diagnostic voltage measurements.
After performing voltage measurements, disconnect power before servicing.
Failure to follow these instructions can result in death or electrical shock.

Service Tool Connection Location
This series of dishwashers is equipped with a data port used by manufacturing and service. The data port is referred to as WIN port, and the data line and circuit is referred to as WIN. For more information about WIN and Service Tool, refer to the cross category Technical Manual, W11509149.
Capability
Most of the capability related to Service Tool is embedded on the Tool or the related App. This means that new capability in many cases will be added to the App, meaning products compatible with Service Tool but already in the field, will also benefit from App enhancements and updates. Currently the App is capable of flashing Firmware and Settings Files. In the future, additional capabilities to the App will be added. Refer to the latest cross category Technical Manual, W11509149 for the latest App capabilities.
DW03G WIN Port Location 2019-2023
The products produced from 2019 into 2023, will have a WIN Port located within the door assembly. Follow all instructions in Technical Manual, W11509149. Remove the outer door panel. Open the plastic cover on the right side of the ACU to access the P3 Connector. Using the Black Service Tool Wire assembly, connect the Service Tool to the ACU.

KitchenAid® and Maytag® 24” Microfiltration Dishwashers n 3-3

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Control Board Information
Specifications
Electrical Supply: (Under Load): 60 Hz 120 VAC Supply Water Flow Rate: To fill 2 qt (1.9 L) in 46 seconds, 120 psi maximum, 20 psi minimum. Supply Water Temperature: 120°F (49°C) (Before starting a cycle, run water from sink faucet until hot). Water Charge: 1.0 gal. (3.9 L) Approximate Lower Spray Arm Rotation: 12 to 40 RPM Upper Spray Arm Rotation: 12 to 30 RPM
Fuse Service and Resistance Check
F500 = Small – TRIAC Load Fuse
Check operation of loads during the Service Diagnostics cycle. n If any of the TRIAC loads work, F500 Fuse is OK. n If all TRIAC loads fail to work, F500 Fuse could be open. See
Fuse Resistance Check.
Fuse Resistance Check:
1. Unplug the dishwasher or disconnect power. 2. Measure resistance of F500 Fuse. NOTE: Fuses are on the bottom of the Control Board but can be checked from the top side. See “Control Pin-out” diagram.
¾ If resistance is < 3 , then fuse is OK. ¾ If resistance is > 3 , then fuse is OPEN.
If the fuse is open:
Inspect and check resistance of all loads on fuse. If any loads are open, shorted, or have evidence of overheating or pinched wires, replace them.

Component Testing
Testing Dishwasher Components from the Control
Before testing any of the components, perform the following checks: n The most common cause for mis-diagnosed control failure
is poor connections. Therefore, disconnecting, inspecting, and reconnecting wires will be necessary throughout test procedures. n All tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohms-per-volt DC, or greater. n Check all connections before replacing components, look for broken or loose wires, failed terminals, or wires not pressed into connectors far enough. n Voltage checks must be made with all connectors attached to the boards. n Resistance checks must be made with power cord unplugged or power disconnected, and with wiring harness or connectors disconnected from the control. n The testing procedures in this section may require the use of needle probes to measure voltage. Failure to use needle probes will damage the connectors.

ACU Diagnostic LED
Always check the LEDs before replacing it.

LED Slow Blinking LED Solid ON LED Double Blink LED Fast Blinking LED OFF
LED Triple Blink

Normal ACU Operation. No unrecoverable ACU failures recorded. LED blinks 0.5 seconds ON / 0.5 seconds OFF Power is applied to the ACU, but no setting file is present. Board is not functional in this state. Flash Setting File or replace ACU. Communication failure between ACU and HMI. Check continuity between ACU and HMI. ACU is performing initialization or ACU setting file is in progress of being programmed. An unrecoverable ACU fault has been recorded or no power is applied to the ACU. Check for L1 voltage at P4 Pin 1. Check fault history. Incompatibility between ACU setting file and firmware. When applicable, use the service tool to re-flash setting file.

3-4 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)
For Service Technician Use Only
Electronic Control Board
CONTROL ASSEMBLY

ROTATE

PINCH TO RELEASE

CONNECTOR BOX

PINCH TO RELEASE

CONTROL PANEL SNAP LOCKS
CONTROL IN PLACE
DIAGNOSTIC LED

CONNECTOR BRACE (TO REMOVE, PINCH ARMS AND ROTATE)
Meter Check of Loads and Supplies

BUTTONS ON BOTTOM OF CONTROL HOUSING SLIDE INTO KEYHOLE SLOTS ON
CONTROL PANEL TO SUPPORT THE CONTROL

-4 -3 -2 -1 P4

-1 -2 -3 -4 -1 -3 -4 -6 -1 -3 -4 -6 -1 -3 -5 -7 -9 -11 -1 -3 -5 -1 -3 -5 -7 -1 -3 -5-6 -1 -3 -5 -7

P5 LT. BLU

P6 BLUE

P8 PINK

P12 VIOLET

P14

P9

P10

P11

BROWN

RED

YELLOW ORANGE

NEUTRAL

L1

DC GND

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-5

COMPONENT TESTING (CONT.)

For Service Technician Use Only

General Theory of Operation
DANGER

Power Check
This test checks for incoming and outgoing power to and from the control board. This test assumes that proper voltages is present at the outlet or direct connect cable.

Test Procedure

Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Refer to wiring diagram in tech-sheet provided with product. Neutral and L1 (AC voltage) enters the Control Board at P4, pins 4 and 1 respectively. AC is converted to DC voltage at the Low Volts Power Supply (LVPS). Supplies include 13 VDC and 5 VDC, and DC GND (REF). These low voltage supplies are used to provide power to the microprocessors and board components, control the TRIAC, power the sensors, user interface, buzzer, fan motor, and energize the AC relays. The 13 VDC is vital to the operation of the dishwasher. This supply is necessary to operate all 120 VAC loads in the dishwasher, whether they are connected to a relay or controlled by TRIAC. 13 VDC is generated by the power supply and flows through the door switch-when closed-to be available to the heater relays (L1 and N), wash motor relay, and the pilot relay. A relay coil becomes energized when the control closes the LV drive circuit for a specific relay completing 13 V pathway, which in turn closes the relay switch providing AC to the load. The Pilot relay provides “L1” to the remainder of the components that are controlled by the Neutral-sensed TRIAC. In the micro- filtration dishwasher, there are 2 or 3 fuses on the Control Board: F500 Small TRIAC Load Fuse, F101 Main Power Supply Fuse, and F501 Wash Motor Fuse. If the TRIAC Fuse is open, all loads controlled by TRIAC will not operate. If the Main Power Supply Fuse is open, no 5 V or 13 V supply will be available and the unit will appear to not power up. If the Wash Motor Fuse (optional) is open, all loads will work except the wash motor. NOTE: Refer to “Fuse Service and Diagnostic Checks” on page 3-4.

1. Unplug dishwasher or disconnect power. 2. Remove access panel. 3. Remove terminal box cover. 4. With a voltmeter set to AC, place black probe on white
terminal block screw head (N) and red probe on black terminal block screw head (L1). 5. Plug in dishwasher or reconnect power. ¾ If 120 VAC is present, unplug dishwasher or disconnect
power and proceed to step 6. ¾ If 120 VAC is not present, have customer correct power.
6. Remove the outer door panel to access the control board. 7. Remove cover from control board and locate connector P4. 8. With a voltmeter set to AC, connect black probe to P4,
pin 4 (N) and red probe to P4, pin 1 (L1). 9. Plug in dishwasher or reconnect power.
¾ If 120 VAC is present, go to step 10. ¾ If 120 VAC is not present, check for open connection
between terminal block and control. Repair as needed.
10. Verify DC Supplies. · 5 VDC is used to power IC’s and micro-processors on the
circuit board as well as provide power to the sensors. ¾ If 5 VDC were missing, the OWI (Optical Water Indicator)
and user interface would not function. To verify 5 V ± 5%, with a voltmeter set to DC, connect the black lead to P10-2 (DC GND) and the red lead to P11A-2 or P11B-2 (5 V).
· 13 VDC is used to actuate the 120 VAC relays and TRIAC on the control, the overfill switch input, and the LEDs on models with interior lighting. ¾ If 13 VDC was missing, the heater, motors, and all the other loads would not turn on as well as the LEDs on models with interior lighting. The control would falsely detect an overfill fault. To verify 13 V ± 5%, with a voltmeter set to DC, connect the black lead to P10-2 (DC GND) and the red lead to P11-7 (13 V).
Troubleshooting Missing DC Supplies: Refer to the wiring diagram in tech-sheet provided with product when troubleshooting the DC supplies. If 5 VDC or 13 VDC is missing on the control, unplug dishwasher or disconnect power, and then disconnect all components/loads from the control relying on the missing or loaded supply. Plug in dishwasher or reconnect power and check if the DC supply has returned. ¾ If not, replace the control. ¾ If it has, turn off dishwasher and reconnect one connector
at a time until the component loading down that supply has been identified.
11. Unplug dishwasher or disconnect power. 12. Reassemble all parts and panels.

3-6 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Door Switch Circuit
Perform the following checks if the dishwasher does not detect the door open or closed. This test will check the wiring to the door switch and the door switch itself. The following items are part of the door switch circuit: n Harness/Connection n Door Switch/Latch Assembly n Control Board
Test Procedure
1. Check for improper installation of the dishwasher or leveling. 2. Check door latch mechanism for obstructions or binding.
Verify door seal is seated properly. 3. Check for interference between dish racks and door. Repair as
necessary. 4. Unplug dishwasher or disconnect power. 5. Remove outer door panel to access door latch and remove
toe and access panels to access control board.

6. Check door switch contacts and all connections in the door switch circuit. Visually check that the P12 connector on the control and the door latch connector are securely installed. ¾ If visual check passes, go to step 5. ¾ If any of the connectors are not inserted properly, reconnect and retest door latch/switch.
7. Disconnect connector P12 from the control board. 8. Using an ohmmeter, measure across P12, pins 9 and 11 with
the door closed, strike completely in latch mechanism (switch closed). ¾ If 3 ohms or less is measured, proceed to step 7. ¾ If high resistance is measured when door is closed, check
for loose connections and repair as needed.
9. Using an ohmmeter, measure across P12, pins 9 and 11 with the door open, strike removed from latch mechanism (switch open). ¾ If reading is infinite, go to step 8. ¾ If reading shows continuity, or door switch is damaged, replace door switch and retest.
10. Set voltmeter to DC and connect red lead to test-pad P11-7 (13 V) and black lead to P10-2 (DC GND) on the control board.
11. Plug in dishwasher or reconnect power and with door open, verify that 13 VDC is present across P11-7 and P10-2. ¾ If 13 VDC is not present, replace the control and retest. ¾ If 13 VDC is present, proceed to step 10.
12. Reconnect P12 to control board and perform Diagnostics Cycle to verify operation.
13. Unplug dishwasher or disconnect power. 14. Reassemble all parts and panels. 15. Plug in dishwasher or reconnect power.

Strip Circuit – Door Switch

(To Heater)

(To Wash Motor, Vent, and Triac Loads)

(To Heater)

(To Wash Motor)

N.O.

Door

Switch

K504

Sensing Heater (N) Relay

N.O.
K503 Pilot (L1) Relay

N.O.
K505 Heater (L1) Relay

N.O.
K502 Motor (N) Relay

Input

13 V

N.O.

P12-9

V P12-11 V

Door

Switch

Electronic Control

P10-2 Ref

Micro Pin

Micro Pin

Micro Pin

Micro Pin

Electronic Control

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-7

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Fill Circuit
This test will check the wiring and components in the fill circuit. The following items are part of the fill circuit: n Harness/Connection n Fill Valve n Control Board
Test Procedure

6. Check the fill valve and harness-using an ohmmeter, measure the resistance between P6-1 and P6-3. ¾ If the resistance is between 1200-1600 ohms, the fill valve and harness are good. Go to step 7. ¾ If outside the range, replace the fill valve. ¾ If an open circuit is detected, check connections and harness continuity between control and fill valve. If good, replace the fill valve.
7. Reconnect P6 to control board. 8. Set voltmeter to AC and connect leads to test-pads
P6-1 and P6-3 on the control board. Plug in dishwasher or reconnect power. 9. Start the Diagnostics Cycle and at the proper interval measure for AC out of the control board between test-pads P6- 1 and P6-3 (Refer to the Fill Valve Strip Circuit below). IMPORTANT: The Fill Valve must be connected to the control board to measure voltage accurately.
¾ If no AC voltage is measured, replace the control board and retest.
¾ If 120 VAC is measured and fill valve is energized, go to step 12.
10. Unplug dishwasher or disconnect power. 11. Reassemble all parts and panels. 12. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.

1. Verify water supply is turned on and supply line is adequate. Check for water siphoning out of the dishwasher (drain loop or improper drain connection). Check for debris in water line or fill valve inlet screen. Check for proper float switch operation. Repair as necessary.
2. Are all the loads controlled by TRIAC not working? ¾ YES – check for open door switch, TRIAC fuse, or pilot relay. ¾ NO – just the Fill Valve. Go to step 3.
3. Unplug dishwasher or disconnect power. 4. Remove toe and outer door panels to access control board. 5. Unplug connector P6 from control board.

Strip Circuit – Fill Valve

L1 BK

P5 Pins 1 and 4 to test fuse

N.O.

P4-1

P6-3

K503

Pilot L1 Relay Fuse

(Also see Door F500

Switch Circuit)

Electronic Control

BU

BU

Pin 3

Pin 1

Fill Valve

1200 -1600 120 V, 60 Hz, 6 W

N

P6-1

P4-4 WH

TRIAC

Electronic Control

3-8 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)
For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Dispenser Circuit
This test will check the wiring to the dispenser and the dispenser solenoid itself. The following items are part of the dispenser circuit: n Harness/Connection n Dispenser Solenoid n Control Board
Test Procedure
1. Check for obstructions or mechanical binding preventing the dispenser lid from opening. Repair or replace as necessary.
2. Are all the loads controlled by TRIAC not working? ¾ YES – check for open door switch, TRIAC fuse, or pilot relay. ¾ NO – just the Dispenser. Go to step 3.
3. Unplug dishwasher or disconnect power. 4. Remove outer door panel to access dispenser and remove
toe and outer door panels to access control board. 5. Unplug connector P12 from control board.

6. Check the dispenser solenoid and harness-using an ohmmeter, measure the resistance between P12-5 and P12-7.
Solenoid:
¾ If the resistance is between 310-380 ohms, the solenoid valve and harness are good. Go to step 7.
¾ If outside the range, replace the dispenser solenoid. ¾ If an open circuit is detected, check connections and
harness continuity between control and dispenser. If good, replace the dispenser solenoid.
7. Reconnect P12 to control board. 8. Set voltmeter to AC and connect leads to test-pads P12-5 and
P12-7 on the control board. Plug in dishwasher or reconnect power. 9. Start the Diagnostics Cycle and at the proper interval measure for AC out of the control board between P12-5 to P12-7 (Refer to the Dispenser Strip Circuit below). IMPORTANT: The Dispenser Solenoid must be connected to the control board to measure voltage accurately. ¾ If no AC voltage is measured, replace the control board
and retest. ¾ If 120 VAC is measured and dispenser motor/solenoid is
energized, go to step 10.
10. Unplug dishwasher or disconnect power. 11. Reassemble all parts and panels. 12. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.

Strip Circuit – Dispenser

L1

Electronic Control

N P5 Pins 1 and 4 to test fuse

BK

N.O.

P4-1

K503

Pilot L1 Relay (also see Door Switch Circuit)

Fuse F500

P12-5

V

V

Pin 1

Pin 3

Dispenser Solenoid 310 – 380
120 V, 60 Hz, 17 W

P12-7

WH P4-4

TRIAC

Electronic Control

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-9

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Water Heating/Heat Dry
This test will check the wiring to the heater element, hi-limit thermostat and the heating circuit itself. The following items are part of the heater circuit: n Harness/Connection n Heater Coil n Hi Limit Thermostat n Control Board
Test Procedure
Control is programmed to disable the heater if it detects a problem with the heating system. This check is performed at the start of a heating period in each cycle. If heating problem is not corrected, the control will disable the heater again. 1. Unplug dishwasher or disconnect power. 2. Remove toe and access panels to outer door control board. 3. Disconnect P4 from the control board.
Strip Circuit – Heater Circuit

4. Using an ohmmeter, measure resistance between P4, pins 2 and 3. ¾ If the resistance is between 10-40 ohms, go to step 6. ¾ If an open circuit is detected, go to step 5.
5. Visually check the wire connections between the control board, the heater element and the hi-limit thermostat. If the connections look good, check for continuity across the heater element and the hi-limit. ¾ Replace heater element or hi-limit thermostat if it is electrically open. ¾ Repair or replace wire harness if test fails continuity.
6. Reconnect P4 to control board. 7. Set voltmeter to AC and connect leads to test-pads P4-2 and
P4-3 on the control board. Plug in dishwasher or reconnect power. 8. Start the Diagnostics Cycle and at the proper interval measure for AC out of the control board between P4-2 and P4-3 using a voltmeter set to AC. ¾ If 120 VAC is measured and heater element is on, go to
step 9. ¾ If no AC voltage is measured, replace control board.
9. Perform Diagnostics Cycle to verify repair. ¾ If heater related error still exists, perform Water Sensing test procedure on following page.
10. Unplug dishwasher or disconnect power. 11. Reassemble all parts and panels. 12. Plug in dishwasher or reconnect power.

Heater L1
BK

Electronic Control

N.O.

P4-1

P4-2

K505

Heater L1 Relay

(Also see Door

Switch Circuit)

N.C.

BU/RD

BU/RD

BU/WH P4-3

Hi-Limit Thermostat
Opens 207°F – 217°F (97°C – 103°C)

Heater Element 10 – 40 120 V, 60 Hz 500 W Dry

Electronic Control

N

N.O.
K504 Heater N Relay (Also see Door Switch Circuit)

P4-4 WH

3-10 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)
For Service Technician Use Only

DANGER

Electrical Shock Hazard
Only authorized technicians should perform diagnostic voltage measurements.
After performing voltage measurements, disconnect power before servicing.
Failure to follow these instructions can result in death or electrical shock.

Water Sensing with the OWI Sensor

This test will check the wiring to the OWI (Optical Water Indicator), which incorporates the temperature thermistor and the foam and turbidity sensor. The following items are part of the water sensing circuit: n Harness/Connection n OWI Sensor n Control Board

Test Procedure

1. Check the operation of the OWI Sensor in the Service Diagnostics Cycle.
2. Unplug dishwasher or disconnect power. 3. Remove toe and access panels to access control board. 4. Disconnect P10 from the Control Board. 5. Using an ohmmeter, measure resistance between P10, pins
1 and 3. The following table provides approximate room and hot water temperatures and their associated resistance values.

Temp °C (°F) 20 (68) 25 (77) 30 (86) 35 (95)

RES Range (k) 57.3 – 60.3 45.9 – 48.1 37.0 – 38.7 30.1 – 31.3

Strip Circuit – Water Sensing

Temp °C (°F)

RES Range (k)

40 (104)

24.6 – 25.4

45 (113)

20.2 – 20.8

50 (122)

16.7 – 17.1

55 (131)

13.9 – 14.2

60 (140)

11.6 – 11.8

65 (149)

9.7 – 9.9

70 (158)

8.2 – 8.4

NOTE: All thermistor resistance measurements must be made while dishwasher is unplugged or disconnected from power and connector P10 removed from control.
¾ If the thermistor resistance is OK , the thermistor is good. Go to step 6.
¾ If the thermistor resistance does not agree with the table, replace the OWI Sensor.
¾ If an open circuit is detected, check connections and harness continuity between control and OWI. If good, replace the OWI Sensor.

6. Using an ohmmeter, check P10 -1 to cabinet ground and P10-3 to cabinet ground. ¾ If no short is indicated, go to step 7.
¾ If either pin indicates continuity to ground (short), repair or replace wiring harness and retest.

7. Reconnect P10 to control board. 8. Test for 5 VDC with a voltmeter set to DC, connect the black
lead to P10-2 and the red lead to P10-3. 9. Plug in dishwasher or reconnect power. 10. Start the Diagnostics Cycle and at the proper interval
measure for 5 VDC out of the control board between P10-2 and P10-3. ¾ If 5 VDC is measured the control is functioning, go to
step 11.
¾ If no DC voltage is measured, replace the control board and retest.

11. Unplug dishwasher or disconnect power. 12. Reassemble all parts and panels. 13. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.

Electronic P10-6 YL Control P10-5 YL
P10-4 YL
P10-3 YL P10-2 YL
P10-1 YL

Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6

Turbidity Drive OWI Sensor Unused

OPT Sig

VCC Ref
NTC

Temperature: NTC Thermistor 45.9 K – 48.1 K at 77°F (25°C) 11.6 K – 11.8 K at 140°F (60°C)

Measure NTC resistance at P10-1 and P10-3 connector disconnected from control.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-11

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Overfill Switch Circuit
Perform the following checks if the dishwasher detects F8E4 when there is no water in the leak pan, or if F8E4 is not detected when water is present in the leak pan. The following items are part of the overfill switch circuit: n Harness/Connection n Overfill Switch/Float Assembly n Control Board
Test Procedure
1. Unplug dishwasher or disconnect power. 2. Remove toe and outer door panels to access leak pan and
control board. 3. Check leak pan for water. If no water is present, go to step 5.
If leak pan is full of water, unplug float switch, remove pan and empty. Replace pan and reconnect float switch. 4. Reconnect power. If F8E4 fault does not return, find source of leak and repair. NOTE: If root cause of overfill is not corrected, customer will experience another overfill and service call in the future.

5. Inspect float assembly. Verify that connector is fully seated. Ensure that Styrofoam floater moves freely up and down and no debris is preventing it from sitting in the down (closed) position. n If no issue found, go to step 6. n Repair/reconnect if any issues found.
6. Disconnect connector P11 from control board. 7. Using an Ohmmeter, measure across P11 pins 6 and 7 with
the float assembly connected and installed in the leak pan. n If 3 ohms or less is measured, go to step 8. n If high resistance is measured, check for loose
connections and repair/replace as needed.
8. Using an Ohmmeter, measure across P11 pins 6 and 7 with the Styrofoam floater lifted up (switch should be open). n If reading is infinite, go to step 9. n If reading shows continuity, replace float assembly and retest.
9. Set meter to DC and connect leads to P11 pins 6 and 7. 10. Plug in dishwasher or reconnect power and verify that
13 VDC is present across P11 pins 6 and 7 with P11 disconnected from the board. n If 13 VDC is not present, replace the control and retest. n If 13 VDC is present, proceed to step 10.
11. Reconnect P11 to control board and run Diagnostics cycle to confirm operation.
12. Reassemble all parts and panels. Ensure that float assembly is connected, seated in leak tray, and tray is reinstalled.
13. Plug in dishwasher or reconnect power.

Strip Circuit – Overfill Switch

Electronic Control

Electronic Control

13 VDC

P11-7

N.O.
P11-6
Overfill Switch (In normal position, float assembly holds switch closed)

Input

3-12 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Diverter Motor
This test will check the wiring to the diverter motor and the diverter motor itself. The following items are part of the diverter motor circuit: n Harness/Connection n Diverter Motor n Diverter Position Switch (see test on following page) n Control Board
Test Procedure
1. Check for operation in Diagnostics Cycle. Listen for water spray changing zones or inspect shaft with mirror to see it rotating during diverter interval. If diverter is rotating, the likely problem is with the diverter sensor (see test procedure on following page). Verify that diverter disk is properly installed on shaft.
2. Are all the loads controlled by TRIAC not working? ¾ YES – check for open door switch, TRIAC fuse, or pilot relay. ¾ NO – just the diverter valve. Go to step 3.

3. Unplug dishwasher or disconnect power. 4. Remove toe and access panels to access control board. 5. Unplug connector P6 from control board. 6. Check the diverter motor using an ohmmeter, measure the
resistance between P6-4 and P6-6. ¾ If the resistance is between 1100-1400 ohms, the diverter
motor and harness are good. Go to step 7. ¾ If outside the range, replace the diverter assembly. ¾ If an open circuit is detected, check connections and
harness continuity between control and diverter assembly. If good, replace the diverter assembly.
7. Reconnect P6 to control board. 8. Set voltmeter to AC and connect leads to test-pads
P6-4 and P6-6 on the control board. Plug in dishwasher or reconnect power. 9. Start the Diagnostics Cycle and at the proper interval measure for AC out of the control board between P6-4 and P6-6 (Refer to Diverter Motor Strip Circuit below). IMPORTANT: The Diverter Motor must be connected to the control board to measure voltage accurately.
¾ If no AC voltage is measured, replace the control board and retest.
¾ If 120 VAC is measured and diverter is rotating, go to step 10.
10. Perform Diagnostics Cycle to verify repair. ¾ If diverter error still exists, perform diverter sensor test procedure on following page.
11. Unplug dishwasher or disconnect power. 12. Reassemble all parts and panels. 13. Plug in dishwasher or reconnect power.

Strip Circuit – Diverter Motor

L1

P5 Pins 1 and 4 to test fuse

N

BK P4-1

N.O. K503

Pilot L1 Relay (Also see Door Switch Circuit)

Fuse F500

Electronic Control

P6-4 BU Pin 3

BU P6-6 Pin 1

P4-4 WH Triac

Diverter Motor 1,100 – 1400 120 V, 60 Hz, 3 W

Electronic Control

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-13

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Diverter Position Optical Sensor
This test will check the wiring to the diverter sensor/position sensor and the diverter assembly itself. The following items are part of the diverter sensor/switch circuit: n Harness/Connection n Diverter Motor (see test on previous page) n Diverter Position Optical Sensor n Control Board
Test Procedure
1. Check the operation of the diverter motor in the Service Diagnostics Cycle. You should be able to “hear” the water spraying from different spray arms as the diverter rotates through the various wash zones.
2. If the diverter is diverting the flow of water to the wash zones, the diverter motor is working-continue to step 3. If not, perform the diverter motor test procedure on the preceding page.

3. Unplug dishwasher or disconnect power. 4. Remove toe and outer door panels to access control board. 5. Visually check that the diverter position switch connector and
P11 connector on the control are securely installed. ¾ If visual check passes, go to step 6. ¾ If any of the connectors are not inserted properly,
reconnect and retest diverter position switch.
6. Check continuity of harness between diverter position switch and P11 on control. ¾ If continuity test is good, continue to step 7. ¾ If continuity test fails, repair or replace harness as needed.
7. To test diverter switch, set up voltmeter for DC voltage and connect red lead to P11-2 and black lead to P10-2.
8. Plug in dishwasher or reconnect power. 9. Run the Service Diagnostics Cycle as stated in Step 1, and
you should observe the diverter position switch closing momentarily and then reopening as it reaches each potential position. DC voltage should vary from approximately 0 V to 8-10 V as the diverter rotates and the sensor detects positions. Monitor for several intervals of the Service Diagnostics Cycle to observe behavior. ¾ If the sensor is functioning normally (Voltage is varying as
diverter rotates), proceed to step 10. ¾ If sensor does not detect positions properly, or voltage is
consistently at 0 V or 8-10 V and does not change, then replace diverter assembly and retest.
10. If the preceding steps did not correct the diverter/position switch problem, replace the control board and retest.
11. Reassemble all parts and panels. 12. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.

Strip Circuit – Diverter Switch

Sensor Drive

P11-3

P11-2

Sensor Input

P10-2

P10-2

Ref

Electronic Control

Diverter Position Optical Sensor

Electronic Control

Switch closes momentarily and then reopens as the diverter reaches each potential diverter position.

Reference for DC power supply

3-14 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Wash Motor
This test will check the wiring to the wash motor and the wash motor itself. The following items are part of the wash motor circuit: n Harness/Connection n Wash Motor and Capacitor n Control Board n Wash motor fuse (Some models)
Test Procedure
1. Check the tube and sump for anything that may be impeding water flow. Inspect and if necessary clean the coarse-filter system. Also, inspect spray arm water nozzles and clean if needed.
2. Check the wash motor and electrical connections by performing the Service Diagnostics Cycle. The following steps assume that this step was unsuccessful.
3. Unplug dishwasher or disconnect power. 4. Remove toe and outer door panels to access control board. 5. Unplug connector P5 from control board. 6. Check the wash motor using an ohmmeter, measure the
resistance between P5-1 and P5-2.
Strip Circuit – Wash Motor

¾ If the resistance is between 10-15 ohms, the wash motor and harness are good. Go to step 7.
¾ If outside the range, replace the wash motor. ¾ If an open circuit is detected, check connections and
harness continuity between control and wash motor. If good, replace the wash motor.
7. Check the motor fuse (Some models). Using an ohmmeter, measure the resistance between P4-1 and P5-1 on the control. ¾ If the resistance is less than 3 ohms, fuse is good. Go to step 8. ¾ If the resistance is greater than 3 ohms, replace the control.
8. Reconnect P5 to control board. 9. Set voltmeter to AC and connect leads to test-pads 10. P5-1 and P5-2 on the control board. Plug in dishwasher or
reconnect power. 11. Start the Diagnostics Cycle and at the proper interval
measure for AC out of the control board between P5-1 and P5-2 (Refer to Wash Motor Strip Circuit below). ¾ If no AC voltage is measured, replace the control board
and retest. ¾ If 120 VAC is measured and wash motor is running, go to
step 12. ¾ If 120 VAC is measured and wash motor is not running, go
to step 10.
12. Test the wash motor capacitor. NOTE: A faulty capacitor may cause the motor to “hum”, not start, or start slowly. A. Discharge the capacitor by touching the leads of a 20,000 ohms resistor to the two terminals. B. Disconnect the wires from the capacitor terminals. C. With an ohmmeter, measure across the terminals and note reading. ¾ If a steady increase in resistance is noted, capacitor is good. Replace wash motor assembly and retest. ¾ If the capacitor is either shorted or open, replace capacitor and retest. ¾ If the preceding steps did not correct the wash motor problem, replace the control board.
13. Unplug dishwasher or disconnect power. 14. Reassemble all parts and panels. 15. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.

L1 BK

Run

Winding

7 – 9

N.O. P4-1
K503 Pilot L1 Relay (Also see Door Switch Circuit)

TURQ at 25°C TURQ

(LBU) P5-1

V

(LBU) P5-2

Fuse F501 (Some models)

Pin 2 AUX Winding Y
10 – 12

Pin 3 Y CAP
23.5 F

Motor and Capacitor

Electronic Control

(Wash Pump)

120 V, 60 Hz, 90 W (No load)

210 W (Full load)

Sense Resistor

N

or Jumper

0

N.O.

P4-4 WH

K502

Motor N Relay

(Also see Door

Switch Circuit)

Electronic Control

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-15

COMPONENT TESTING (CONT.)

For Service Technician Use Only

Soil buildup on the RIF filter can cause F9E1 drain pump not the issue. In those cases there was not water left in the tub. Check the following things:
¾ Pinched drain hose and/or hose routing ¾ Wire off ¾ Old hose is blocked somewhere in the line. ¾ If none of those, then remove the drain pump and check
for axial play. ¾ If the axial play is fine, also check for motor short or open. ¾ Blocked knock-out port in a new garbage disposal ¾ Food soil buildup in the pump housing (see error code
F7E4)
DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Drain Motor
This test will check the wiring to the drain motor and the drain motor itself. The following items are part of the drain motor circuit: n Harness/Connection n Drain Motor n Control Board
Test Procedure
1. Verify that drain hose or drain path is not obstructed. Check for blockage from sump check valve to customer’s plumbing. Check for plugged garbage disposal or disposal plug not knocked out. Check drain loop, stuck check valve, or for plugged hoses. Repair as needed.
Strip Circuit – Drain Motor

2. Check the drain motor and electrical connections by performing the Service Diagnostics Cycle. The following steps assume that this step was unsuccessful.
3. Are all the loads controlled by TRIAC not working? ¾ YES – check for open door switch, TRIAC fuse, or pilot relay. ¾ NO – just the drain motor. Go to step 4.
4. Unplug dishwasher or disconnect power. 5. Remove toe and outer door panels to access control board. 6. Unplug connector P5 from control board. 7. Check the drain motor using an ohmmeter, measure the
resistance between P5-3 and P5-4. ¾ If the resistance is between 27-33 ohms, the drain motor
and harness are good. Go to step 8. ¾ If outside the range, replace the drain motor. ¾ If an open circuit is detected, check connections and
harness continuity between control and drain motor. If good, replace the drain motor.
8. Reconnect P5 to control board. 9. Set voltmeter to AC and connect leads to test-pads P5-3 and
P5-4 on the control board. Plug in dishwasher or reconnect power. 10. Start the Diagnostics Cycle and at the proper interval measure for AC out of the control board between P5-3 and P5-4 (Refer to Drain Motor Strip Circuit below). IMPORTANT: The Drain Motor must be connected to the control board to measure voltage accurately.
¾ If no AC voltage is measured, replace the control board and retest.
¾ If 120 VAC is measured and drain motor is running, go to step 11.
11. Unplug dishwasher or disconnect power. 12. Reassemble all parts and panels. 13. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair. The drain pump motor may experience an intermittent instance to lock up. In many cases, the pump cools down and will operate again.
For intermittent pump locking, check the following:
Resistance provided in specification. Harness wiring to the pump for continuity. Voltage at the pump. Then remove the drain pump and check for axial play. If the
axial play is fine, also check for motor short or open. If all checks are acceptable, change the pump to assume that
it has the rare intermittent instance. Replacement parts are not likely to have the same condition.

L1 N
P5 Pins 1 and 4 to test fuse

BK

N.O.

P4-1

K503

P5-3 BR Pin 1

BR P5-4 Pin 3

P4-4 WH

Pilot L1 Relay (Also see Door Switch Circuit)

Fuse F500

Drain Motor

TRIAC

Electronic Control

27 – 33 120 V, 60 Hz, 45 W

Electronic Control

3-16 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)
For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
DC Fan Motor
This test will check the wiring to the DC fan motor and the fan motor itself. The following items are part of the DC Fan Motor circuit: n Harness/Connection n DC Fan Motor n Control Board
Test Procedure
1. Check for fan operation in the Diagnostics Cycle. The DC fan should be running during step 4.
2. Unplug dishwasher or disconnect power. 3. Remove toe and outer door panels to access control board.

4. Unplug connector P14 from control board. 5. Check the fan motor using an ohmmeter, measure the
resistance between P14-1 and P14-2. ¾ If the resistance is between 145-185 k , the fan motor
and harness are good. Go to step 7. ¾ If outside the range, replace the fan motor assembly. ¾ If an open circuit is detected, check connections and
harness continuity between control and fan motor. If good, replace the fan motor assembly.
6. Reconnect P14 to control board. 7. Set voltmeter to DC and connect leads to test-pads
P14- 1 and P14-2 on the control board. Plug in dishwasher or reconnect power. 8. Start the Diagnostics Cycle and at the proper interval measure for DC out of the control board between P14-1 and P14-2 (Refer to DC Fan Motor Strip Circuit below). IMPORTANT: The Fan Motor must be connected to the control board to measure voltage accurately!
¾ If no DC voltage is measured, replace the control board and retest.
¾ If 13 VDC ± 5% is measured and the fan is spinning, go to step 9.
9. Unplug dishwasher or disconnect power. 10. Reassemble all parts and panels. 11. Plug in dishwasher or reconnect power and run Diagnostics
Cycle to verify repair.

Strip Circuit – DC Fan Motor

Electronic Control

Electronic Control

13 VDC P14-1

Pin 1

Pin 3

Fan Motor
13 V / 1 W 145- 185 k

P14-2 Ref

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-17

COMPONENT TESTING (CONT.)

For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
Interior LED Lighting (some models)
This test will check the wiring to the LED tube lights and the lights themselves. The following items are part of the LED Tube Lights circuit: n Harness/Connection n LED Tube-lights (2) n Control Board
Under normal operation
· The Interior LED Lighting is not on during the wash cycle. · The Interior LED Lighting turns on when the door is opened
and remains on for 10 minutes.
Test Procedure
NOTE: The two (2) LED Tube-lights are wired in parallel. It is possible for one light to malfunction and the other to remain operational.

1. Open dishwasher door. The Interior LED Lights should turn on. The following steps assume that this step was unsuccessful.
2. Unplug dishwasher or disconnect power. 3. Remove toe and outer door panels to access control board. 4. Visually check that the P9 connector on the control is
securely installed. ¾ If visual passes, go to step 5. ¾ If the connector is not inserted properly, reconnect and
retest Interior LED Lighting.
5. Disconnect P9 from the Control Board. 6. Measure each LED light individually using the diode check
setting on the multimeter. Meter should display a numeric reading from anode to cathode and “OL” reading from cathode to anode (refer to strip circuit below). ¾ If LED check passes, go to step 7. ¾ If any of the LEDs do not pass the check, replace the
defective LED individually and retest Interior LED lighting.
7. Set voltmeter to DC and connect red lead to P9-3 and black lead to P9-4 on the control board. Plug in dishwasher or reconnect power.
8. Measure for 13 VDC between P9-2 and P9-4 with lights disconnected and door opened. Light output must be measured within 10 minutes of opening the door. ¾ If 13 VDC is not present, replace the control and retest. ¾ If 13 VDC is present, proceed to step 9.
9. Unplug dishwasher and disconnect power. 10. Reassemble all parts and panels. 11. Plug in dishwasher or reconnect power.

Strip Circuit – Interior LED Lighting

Electronic Control
13 VDC P9-4

A

C

Pin 3

Pin 1

Light

Electronic Control
P9-3 Ref

A

C

Pin 3

Pin 1

Light

3-18 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT TESTING (CONT.)
For Service Technician Use Only

DANGER
Electrical Shock Hazard Only authorized technicians should perform diagnostic voltage measurements. After performing voltage measurements, disconnect power before servicing. Failure to follow these instructions can result in death or electrical shock.
ACU Diagnostic LED
Always check the LED’s before replacing it. The control is equipped with a single LED which is intended to help diagnose if the ACU needs to be replaced. The LED has different display patterns which indicate different states. LED Slow Blinking: Normal ACU operation. No unrecoverable ACU fault has been recorded. LED blinks 0.5 seconds ON/ 0.5 seconds OFF. LED Solid ON: Power is applied to ACU, but no Setting File has been programmed. Board is not functional in this state. Flash Setting File or replace ACU. LED Double Blink: Communication failure between ACU and HMI. Check continuity between ACU and HMI. LED Fast Blink: ACU is performing initialization or ACU setting file is in progress of being programmed. LED OFF: An unrecoverable ACU fault has been recorded or no power is applied to the ACU. Check for L1 voltage at P4 Pin 1. Check fault history. LED Triple Blink: Incompatibility between ACU setting file and firmware. When applicable, use the service tool to re-flash setting file.

User Interface (UI)
This test will check the wiring to the user interface and the user interface itself. The following items are part of the user interface circuit: n Harness/Connection n User Interface (UI) n Status LED (On some models) n Control Board
Test Procedure
1. Verify that the control lock-out feature has not been turned on by the customer. If unit will not run or power up, perform Power Check procedure. Also, check for excessive condensation on UI parts due to vent and/or fan problem.
2. Unplug dishwasher or disconnect power. 3. Remove toe and outer door panels to access control board. 4. Disconnect user interface connection from control board.
Verify all other connections to the control are good. 5. Plug in dishwasher or reconnect power. 6. Perform DC power supply voltage checks as described above
in “General Theory of Operation” section. 7. Repair/replace faulty parts. 8. Unplug dishwasher or disconnect power. 9. Reassemble all parts and panels. 10. Plug in dishwasher or reconnect power.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 3-19

COMPONENT TESTING
For Service Technician Use Only Component Location
A B
G C D
E F
A. Water feed tube B. Water inlet opening C. Coarse filter D. Heating element E. Detergent dispenser F. Active vents (on some models) G. Lower spray arm
3-20 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

Mulmedia Enhanced

COMPONENT ACCESS

Section 4: Component Access
This section provides service parts access, removal, and
installation instructions for the “KitchenAid® and Maytag®
24″ Microfiltration Dishwashers.”
n Insulation Blanket and Door Latch Strike n Siphon Break n Accessing Door Components n Removing the Inner Door and Hinges n ProDryTM Assembly n Removing User Interface and Door Latch n Removing Dispenser Assembly n Removing the Upper Rack (for Satin Glide rails) n Removing the Third Level Rack (available on some
models) n Removing Lower Spray Arm and Manifold Assembly n Under Tub Components n Removing Heater Assembly n Removing Drain Pump n Drip Pan and Float Assembly n Removing Drain pump and Motor Assembly
Video Available Look for this ICON through out Section 4.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 4-1

COMPONENT ACCESS (CONT.)

Insulation Blanket and Door Latch Strike

WARNING

Remove Door Latch Strike
1. Open the dishwasher door. 2. Press down on the round tab in front of the door latch strike.

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
Installing Insulation (Stainless models only)
1. Fasten the blanket on the hooks located on each side of the tube.
3. While pressing down on the round tab, depress the two outside bars and pull out the latch.

4-2 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

WARNING

COMPONENT ACCESS (CONT.)
Siphon Break
4. Disconnect drain pump hose. Remove black plastic C-clamp securing drain pump hose to siphon break and pull hose down and away from siphon break assembly.

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
Tools Needed:
Oil filter wrench or 90 degree bent nose pliers 1. Locate siphon break nut inside tub back lower left corner. 2. Use oil filter wrench or bent nose pliers to loosen siphon
break nut inside tube by turning it counterclockwise.

A

B

C

A. Siphon Break Assembly B. C-Clamp C. Drain Pump Hose 5. Disconnect drain pump output hose. Using pliers, squeeze drain hose output clamp and pull down on hose away from siphon break assembly.
A B
C

3. Disconnect water inlet hose. Using pliers, squeeze water inlet clamp and pull hose away from siphon break.

A. Siphon Break Assembly B. Clamp C. Drain Pump Output Hose
6. Using pliers squeeze plastic retainer together and pull siphon break assembly out and up to remove.

A
AB C

A. Siphon Break Assembly B. Clamp C. Water Inlet Hose

A. Plastic Retainer KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 4-3

COMPONENT ACCESS (CONT.)

Accessing Door Components

WARNING

3. Lift the outer door assembly up and away with enough room to disconnect the ACU harness and clip. Unclip the harness from the harness retaining clip.

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
Remove the Outer Door Panel
1. Unplug dishwasher or disconnect power. 2. Using a TORX T15 screwdriver, remove the six short screws
(three on each side) and three long as shown in below image:

NOTE: Leave the (short) screw to the left of the door latch in place as this screw secures the door latch to the door.

Torx T15 and T20 are trademarks of Acument Intellectual Properties, LLC.
4-4 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT ACCESS (CONT.)

Accessing Door Components (Continued)

4. Disconnect the fan, the dispenser and door latch harness connection before moving forward. Disconnect the fan and door latch harness by pushing up on the connector tab and pull the harness connector off.

6. Flip the ACU cover own door. Push up on the connector tab and pull the harness connector off the board.

A B
C
A. Fan Connector B. Door Latch Connector C. Dispenser Connector 5. Remove the 1/4″ nut securing the ground wire.

Remove the ACU
7. To remove ACU, use a flat blade screwdriver to push in on tab. Then lift up on ACU and slide to the left.
8. Turn the ACU assembly over and depress the three tabs to release the wire harness connector cover. Disconnect wire harness connectors and replace ACU.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 4-5

COMPONENT ACCESS (CONT.)

Removing the Inner Door and Hinges

WARNING

5. Remove the two T20 screws attaching the inner door panel to the hinge and repeat for other hinge. Then lift up on inner door to remove.

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
Remove the Inner Door
1. Unplug dishwasher or disconnect power. 2. Complete the step 1-4 from Remove the Outer Door Panel
section. 3. Remove the cross-bar from the hinges.

Remove the Hinge
6. Using a 5/16″ nut driver remove two rear screws and use a 1/4″ nut driver to remove the front two screws. Repeat the step for other hinge.

4. Open the inner door slightly and insert 7/64″ drill bits (or Allen wrench’s) into hinge hole as shown in below image: This will keep the hinge slightly open and make replacing the inner door easier.

NOTE: While holding on to the hinge, keep the drill bit or allen wrench in place to secure the closing of hinge.
7. Remove the hinge by sliding off from the machine. 8. Reinstall the new hinge in same position as the old hinge was
removed. NOTE: Leave the pin inserted until the hinge, inner door, and crossbar is installed. IMPORTANT: Use the 1/4″ nut driver to install the top front screws first for alignment. Then using the 5/16″ nut driver install the bottom front screws.

4-6 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT ACCESS (CONT.)

ProDryTM Assembly

WARNING

4. Disconnect wax motor connector by pressing down on tab and lifting up on harness connector.

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
Tools Needed:

5. Remove fan harness by pushing down on tab and lifting up on harness. Refer the above image.
6. To remove vent assembly, use a screwdriver to push in on tab shown and pull vent away from wax motor.

90 degree bent nose pliers
1. Complete the step 1-4 from Remove the Inner Door section. 2. Using 90 degree bent nose pliers turn the ProDryTM vent
counterclockwise to loosen and remove.

3. The ProDryTM assembly can now be removed.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 4-7

COMPONENT ACCESS (CONT.)

Removing User Interface and Door Latch

WARNING

Remove the Latch Assembly
4. Use a T15 screwdriver to remove the one screw attaching the Latch Assembly to the door panel.

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
Remove the User Interface
1. Unplug dishwasher or disconnect power. 2. Complete the step 1-6 from ProDryTM Assembly section. 3. Use a T15 screwdriver to remove the three (3) screws
securing the UI to the outer door panel.

NOTE: The light pipe is not removed during UI replacement. It remains attached to the outer door panel. 4-8 n KitchenAid® and Maytag® 24″ Microfiltration Dishwashers

COMPONENT ACCESS (CONT.)

Removing Dispenser Assembly

WARNING

Locking Clips for Dispenser Assembly

Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
1. Unplug dishwasher or disconnect power. 2. Complete the step 1-4 from Remove the Outer Door Panel
section. 3. Disconnect dispenser harness by pushing down on harness
retainer while pulling the harness from the dispenser.

4. Remove dispenser by prying each clip away from the dispenser and lifting it away from the door panel.

KitchenAid® and Maytag® 24″ Microfiltration Dishwashers n 4-9

COMPONENT ACCESS (CONT.)

Removing the Upper Rack (for Satin Glide rails)

1. Open the dishwasher door. 2. To gain access to the removable tabs on the tracks/rails, pull
the upper rack forward about halfway out of the tube.

Remove Roller and Rack Adjuster Assembly

6. Remove rack adjust retainer. Using a flat blade screwdriver push in on the tab.

3. On one side, press the tab on the track in and pull up the front end of the rack out of the track.

7. While pushing in on tab lift up on the rack adjust retainer to remove.

8. Repeat for other rack adjust tab. 9. Using a flat blade screwdriver push in on two tabs as shown
in below image:
4. Then repeat this step on the other side to completely remove the front e

References

• ServiceMatters
• New 2020 Dishwasher Redesign Hinge Replacement
• Troubleshooting Consumer Facing Error Codes On Your 2020 Dishwasher
• 2020-21 Dishwasher Service Diagnostics Cycle Timing
• Rotating Inlet Filter Pump Access and Replacement
• Pump Location and Pump Types
• 2020 DISHWASHER DRIP PAN FLOAT ASSEMBLY VIDEO
• 2020DISH UPPER RACK
• 2020DISH OUTER DOOR
• 2020DISH LOWER SPRAY ARM
• 2020DISH SIPHON BREAK
• 2020DISH PRODRY
• 2020DISH DOOR LATCH STRIKE
• 2020DISH UNDER TUB COMPONENT ACCESS
• 2020DISH REMOVE ACU
• 2020DISH THIRD LEVEL RACK

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