Maytag MDB series User Manual

Maytag Chopper Dishwashers
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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

Maytag MDB series Specifications

General

Type	Built-In
Capacity	14 Place Settings
Tub Material	Stainless Steel
Energy Star Certified	Yes
Soil Sensor	Yes
Heated Dry	Yes
Control Type	Electronic
Delay Start	Yes