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Whirlpool Diskmaskin WDF550SAHB

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KD-18

18” & 24” ADA Models

Built-In Dishwashers

W11187658

SERVICE MANUAL

ii n

18” & 24” ADA Built-In Dishwashers

FORWARD

This Service Manual, "18” & 24” ADA Built-In Dishwashers” (Part No. W11187658), provides the In-Home

Service Professional with service informaon for the “18” & 24” ADA Built-In 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 “18” & 24” ADA Built-In 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.

18” & 24” ADA Built-In Dishwashers n

iii

TABLE OF CONTENTS

18” & 24” ADA Built-In Dishwashers

SECTION 1 — GENERAL INFORMATION

DISHWASHER SAFETY .........................................................................................................................1-2

GENERAL INFORMATION ...................................................................................................................1-3

18” PRODUCT AND CABINET OPENING DIMENSIONS .......................................................................1-4

24” PRODUCT AND CABINET OPENING DIMENSIONS .......................................................................1-5

MODEL & SERIAL NUMBER LABEL .....................................................................................................1-6

TECH SHEET LOCATION .......................................................................................................................1-6

MODEL & SERIAL NUMBER NOMENCLATURE ...................................................................................1-7

DISHWASHER SPECIFICATIONS ..........................................................................................................1-8

SECTION 2 — DIAGNOSTICS & TROUBLESHOOTING

DIAGNOSTIC & TROUBLESHOOTING WARNINGS ..............................................................................2-2

SERVICE MODE - 24” DISHWASHER, FRONT DISPLAY ........................................................................2-3

SERVICE MODE - 18” DISHWASHER, FRONT DISPLAY ........................................................................2-4

SERVICE MODE - 18” & 24” DISHWASHER, TOP DISPLAY (PANEL READY) .........................................2-5

SERVICE ERROR CODES ......................................................................................................................2-6

TROUBLESHOOTING GUIDE ...............................................................................................................2-7

CUSTOMER TROUBLESHOOTING GUIDE ..........................................................................................2-11

SECTION 3 — TESTING

TESTING WARNINGS...........................................................................................................................3-2

WIRING DIAGRAM ..............................................................................................................................3-3

GENERAL THEORY OF OPERATION .....................................................................................................3-4

POWER CHECK ....................................................................................................................................3-4

DOOR SWITCH CIRCUIT ......................................................................................................................3-5

COMPONENT TESTING .......................................................................................................................3-6

CONTROL BOARD ...............................................................................................................................3-6

WATER INLET VALVE ...........................................................................................................................3-8

DISPENSER CIRCUIT ............................................................................................................................3-9

HEATING ELEMENT ...........................................................................................................................3-10

TURBIDITY SENSOR ..........................................................................................................................3-11

THERMISTOR ....................................................................................................................................3-12

OVERFLOW SWITCH .........................................................................................................................3-13

FLOW METER ....................................................................................................................................3-14

WASH PUMP .....................................................................................................................................3-15

DRAIN PUMP ....................................................................................................................................3-16

PRESSURE SWITCH ...........................................................................................................................3-17

NOTES ...............................................................................................................................................3-18

Connued on next page . . .