Maytag ACO1840AB, ACO1840AC, ACO1560AB, ACO1530AB, ACO1560AC, ACO1560AS, ACO1860AC When Start pad is

Page 16

Troubleshooting Procedures

Check:

1.Primary and Secondary Interlock Switches.

2.Thermostat.

Unit does not heat even

 

Check the

if display counts down

 

 

contacts of

when START pad is

 

 

RY2 relay.

pressed for high power.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does relay

 

Verify proper

 

contacts measure

YES

connection of

 

correct resistance.

ribbon

 

 

 

connector.

 

NO

 

 

Does ribbon

 

 

 

 

 

 

connector have

Replace

 

NO

proper

 

connection.

circuit

 

 

 

 

YES

board.

 

 

 

 

 

 

 

Reconnect ribbon

 

 

 

connector for

Replace

 

 

proper

 

 

connection.

circuit

 

 

 

board.

Unit operates.

 

 

 

Unit does not heat even if display counts down when START pad is pressed for high power.

Measure resistance of

high voltage transformer.

See to Testing Procedures on page 10.

 

 

 

 

 

 

Measure

 

 

 

Does transformer

YES

resistance of high

Does capacitor

have the correct

voltage capacitor.

 

 

 

 

 

have correct

resistance.

 

 

 

 

See to

 

 

 

 

resistance.

YES

 

 

 

 

 

 

Testing Procedures

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

on page 10.

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Measure

Replace

 

 

 

 

 

Replace

 

resistance of high

 

 

 

 

 

 

 

voltage diode.

high voltage

 

 

 

 

 

high voltage

 

 

 

 

 

 

 

 

 

See to

transformer.

 

 

 

 

 

transformer.

 

 

 

 

 

 

 

 

Testing Procedures

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

on page 10.

 

Replace

 

 

 

high

 

 

 

voltage

 

 

Unit operates.

diode.

NO

Does diode

 

 

have correct

 

 

 

 

 

 

resistance

 

Replace

YES

 

 

magnetron.

 

 

16021668 Rev. 0

16

©2002 Maytag Appliances Company

Image 16
Contents Service Customer Service Support Center Recognize Safety Symbols, Words, and LabelsImportant Information Web Site Telephone NumberTable of Contents Wiring Important Product InformationGrounding Instructions Servicing of Grounded ProductsImportant Safety Information Microwave Leakage Testing General Information Vent grille Microwave Oven DescriptionOven control Testing Procedures High Voltage Capacitor High Voltage DiodeHumidity Sensor RelayACO1520/ACO1530 models Pad Conn ACO1560/MMV5156 models Pad ConnACO1560/MMV5156 models ACO1840/MMV4184 models Pad ConnCircuit Board Oven ThermostatFuse Fan MotorTroubleshooting Procedures Adjust or Wire across Replace high Thermostat When Start pad is Check Power Supply Fuse Disassembly Procedures Door AssemblyDoor Disassembly GrilleControl Panel BoardControl Panel Removal Relay ACO1520*, ACO1530*, and MMV5156Power Transformer Outer CaseScrew Control Panel Circuit Board RelayStirrer Assembly some models Interlock Door Latch SwitchesAdjusting Interlocks DiodeACO1840*, ACO1860*, JMV8196 MMV4184*, and MMV5186 High Voltage Capacitor RemovalMagnetron Fan Assembly Power Transformer RemovalTransformer Fuse RemovalMagnetron Thermal Fuse Magnetron Thermal FuseFan Motor Humidity Sensor RemovalBase Thermostat Light SocketTurntable Motor Vent BlowerWiring Diagram and Schematic ACO1560* and MMV5156* Models ACO18*, JMV8196*, MMV4184, and MMV5186* Models Installation Instruction Appendix aAvoid Electrical Shock Electrical rating of this oven 120V AC 60HzDo not expose yourself to excessive microwave energy Do not USE the Microwave OvenParts, Tools, and Materials Tools and materials required for installationFollowing parts are supplied with the oven Preparing Electrical Connection Preparing Venting SystemRoof-Venting Roof VentingRoom Venting Standard Fittings Ductwork LengthRoof Venting Installation Wall Venting InstallationRoom Venting Installation Recirculating Preparing Venting BlowerPreparing Template Placement Preparing Wall and Upper CabinetInstalling Mounting Plate Drilling Holes in the Wall and Upper CabinetAttaching Oven to the Wall Damper This page intentionally left blank Appendix B Cleaning the Grease Filters Care and CleaningCharcoal Filter Replacement Cooktop/Night Light Replacement Oven Light Replacement