Maytag MDB series User manual

TECHNICAL EDUCATION
JOB AID W10329932
L-84
Vertical Modular
Washer
M-17
Maytag Dishwashers
4-Blade Stainless Steel Chopper
W11035362
SERVICE MANUAL

ii n Maytag Chopper Dishwashers
FORWARD
This Maytag Service Manual, "Maytag Dishwashers, 4-Blade Stainless Steel Chopper" (Part No.
W11035362), provides the In-Home Service Professional with service informaon for the “Maytag Chopper
Dishwasher."
The Wiring Diagram used in this Service Manual is typical and should be used for training purposes only.
Always use the Wiring Diagram supplied with the product tech sheet when servicing the dishwasher.
For specic operang and installaon informaon on the model being serviced, refer to the “Use and Care
Guide” or “Installaon Instrucons” provided with the dishwasher.
GOALS AND OBJECTIVES
The goal of this Service Manual is to provide informaon that will enable the In-Home Service Professional
to properly diagnose malfuncons and repair the “Maytag Chopper Dishwasher.”
The objecves of this Service Manual are to:
• Understand and follow proper safety precauons.
• Successfully troubleshoot and diagnose malfuncons.
• Successfully perform necessary repairs.
• Successfully return the dishwasher to its proper operaonal status.
WHIRLPOOL CORPORATION assumes no responsibility for any repairs made on our
products by anyone other than authorized In-Home Service Professionals.
Copyright © 2017, Whirlpool Corporaon, Benton Harbor, MI 49022

Maytag Chopper Dishwashers n iii
TABLE OF CONTENTS
Maytag Chopper Dishwashers
SECTION 1 — GENERAL INFORMATION
DISHWASHER SAFETY.........................................................................................................................1-2
GENERAL THEORY OF OPERATION.....................................................................................................1-3
NEW COMPONENTS ...........................................................................................................................1-4
MODEL & SERIAL NUMBER LABEL .....................................................................................................1-6
TECH SHEET LOCATION.......................................................................................................................1-6
MODEL & SERIAL NUMBER NOMENCLATURE ...................................................................................1-7
DISHWASHER SPECIFICATIONS ..........................................................................................................1-8
PARTS & FEATURES.............................................................................................................................1-9
NOTES ...............................................................................................................................................1-10
SECTION 2 — DIAGNOSTICS & TROUBLESHOOTING
DIAGNOSTIC & TROUBLESHOOTING WARNINGS..............................................................................2-2
SERVICE DIAGNOSTIC CYCLE ..............................................................................................................2-3
SERVICE DIAGNOSTIC CYCLE NOTES ..................................................................................................2-4
CUSTOMER CYCLE OPERATION ..........................................................................................................2-4
SERVICE DIAGNOSTICS WITH ERROR CODES.....................................................................................2-5
SERVICE ERROR CODES ......................................................................................................................2-6
TROUBLESHOOTING GUIDE .............................................................................................................2-11
SECTION 3 — TESTING
TESTING WARNINGS...........................................................................................................................3-2
WIRING DIAGRAM..............................................................................................................................3-3
CONTROL BOARD INFORMATION ......................................................................................................3-4
FUSE SERVICE & RESISTANCE CHECKS................................................................................................3-4
COMPONENT TESTING .......................................................................................................................3-4
ELECTRONIC CONTROL BOARD..........................................................................................................3-5
METER CHECK OF LOADS & SUPPLIES................................................................................................3-5
GENERAL THEORY OF OPERATION.....................................................................................................3-6
POWER CHECK....................................................................................................................................3-6
DOOR SWITCH CIRCUIT ......................................................................................................................3-7
FILL CIRCUIT........................................................................................................................................3-8
DISPENSER CIRCUIT............................................................................................................................3-9
WATER HEATING/HEAT DRY .............................................................................................................3-10
WATER SENSING WITH OWI SENSOR...............................................................................................3-11
WASH/RINSE MOTOR.......................................................................................................................3-12
DRAIN MOTOR..................................................................................................................................3-13
VENT WAX MOTOR...........................................................................................................................3-14
VENT FAN..........................................................................................................................................3-15
AC FAN MOTOR.................................................................................................................................3-16
POWER BLAST...................................................................................................................................3-17
USER INTERFACE (UI)........................................................................................................................3-19

iv n Maytag Chopper Dishwashers
PRODUCT SPECIFICATIONS & WARRANTY INFORMATION SOURCES (inside back cover)
SECTION 4 — COMPONENT ACCESS
ADJUSTABLE DOOR SPRINGS .............................................................................................................4-2
INSULATION BLANKET........................................................................................................................4-3
DOOR LATCH STRIKE...........................................................................................................................4-3
ACCESSING DOOR COMPONENTS......................................................................................................4-4
USER INTERFACE.................................................................................................................................4-4
REMOVING DOOR LATCH ASSEMBLY .................................................................................................4-5
REMOVING ELECTRONIC CONTROL BOARD ......................................................................................4-6
REMOVING DISPENSER ASSEMBLY....................................................................................................4-7
REMOVING WATER FILL & DISPENSER COMPONENTS......................................................................4-8
ADVANCED POWER DRY (SIDE DRY) ..................................................................................................4-9
OVERFILL ASSEMBLY ........................................................................................................................4-10
IN TUB COMPONENTS......................................................................................................................4-11
SPRAY ARMS, FEED TUBE, AND MANIFOLD.....................................................................................4-12
REMOVING THE RACKS ....................................................................................................................4-13
REMOVING LOWER SPRAY ARM ......................................................................................................4-14
UNDER TUB COMPONENTS..............................................................................................................4-15
REMOVING HEATER ASSEMBLY........................................................................................................4-16
REMOVING DRAIN PUMP ................................................................................................................4-17
REMOVING OPTICAL WATER INDICATOR (OWI)..............................................................................4-18
REMOVING THE SUMP ASSEMBLY...................................................................................................4-19
CHOPPER MOTOR ASSEMBLY PARTS ...............................................................................................4-22
REMOVING THE CHOPPER MOTOR ASSEMBLY................................................................................4-23
NOTES ...............................................................................................................................................4-26
Maytag Chopper Dishwashers
TABLE OF CONTENTS (CONTINUED)

GENERAL INFORMATION
Maytag Chopper Dishwashers n 1-1
Section 1:
General Information
This secon provides general safety, parts, and informaon for
the “Maytag Chopper Dishwasher.”
nDishwasher Safety
nGeneral Theory of Operaon
nNew Components
nModel & Serial Number Label
nTech Sheet Locaon
nModel & Serial Number Nomenclature
nDishwasher Specicaons
nParts & Features
nNotes

1-2 n Maytag Chopper Dishwashers
GENERAL INFORMATION
Dishwasher Safety
You can be killed or seriously injured if you don't immediately
You can be killed or seriously injured if you don't follow
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.
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:
follow instructions.
instructions.
DANGER
WARNING

GENERAL INFORMATION
Maytag Chopper Dishwashers n 1-3
General Theory of Operation
Maytag Chopper Wash System
Maintenance Free Chopper System
A 4-Blade stainless steel chopper pulverizes food, prevenng
parcles from plugging the wash system and spray jets,
providing opmal cleaning without the need to prerinse
No more scraping plates. The 4-blade stainless steel chopper
disintegrates the food parcles that come o your dishes so
they don’t end up recirculang and scking to your dishes and
glassware.
How Chopper Works (See Figure 1)
1. Water and food parcles ow through the coarse lter
then are disintegrated by the Chopper blades (A).
2. An impeller pulls soiled water into the wash pump
through the screen (B), ltering soil parcles too large
to pass through and sending them back to the Chopper
blades.
3. The wash water is then cycled back through the spray
arms (C).
4. During the drain phase, a secondary pump ushes out
used wash water.
Figure 1 - Chopper Wash System
nMaytag® dishwashers feature the most
powerful motor on the market, so you
can be sure what you put in comes out
clean.
(A)
(B)
(C)

1-4 n Maytag Chopper Dishwashers
GENERAL INFORMATION
New Components
Chopper Sump Assembly Top & Boom Views
Accumulator Cover
Accumulator Screen Ass’y
Diverter Cover
Chopper Motor Assembly
Drain Pump Port
Motor Capacitor
Chopper Motor Assembly
Figure 2 - Chopper Sump Assembly - Top
Figure 3 - Chopper Sump Assembly - Bottom

GENERAL INFORMATION
Maytag Chopper Dishwashers n 1-5
New Components
New Stainless Steel Elements
FID Console Display with Stainless Steel Bar Handle (Figure 4)
Full Stainless Steel Tub, Spray Arms, and Sump Cover (Figure 6)
Full Stainless Steel Tub
Stainless Steel Spray Arms
Stainless Steel Sump Cover
7 - Segment Display
Stainless Steel Silverware Basket (Figure 5)

1-6 n Maytag Chopper Dishwashers
GENERAL INFORMATION
Tech Sheet Location
Model & Serial Number Label
Tech Sheet Location
Figure 7 - Model/Serial Number Label located inside, on left side wall, toward front.
Figure 8 - Tech Sheet located behind toe panel inside insulation folds.
Model & Serial Number
Label Location