Whirlpool 721.663398 manual Condition, Check, Result

Page 27

(TROUBLE 1) The following visual conditions indicate a probable defective control circuit.

1.Incomplete segments.

•Segment missing.

•Partial segment missing.

•Digit flickering (NOTE: Slight flickering is normal.)

2.Colon does not turn on or blink.

3.A distinct change in the brightness of one or more numbers in display.

4.One or more digits in the display are not lighting.

5.Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display.

6.Specific numbers (for example 7 or 9) will not display when key pad is touched.

7.Display does not count down with time blinking or up with clock operation.

8.Display obviously jumps in time while counting down.

9.Display counts down too fast while cooking.

10.Each indicator light does not turn on after setting cooking cycle.

11.Display time of day does not reappear when cooking is finished.

CONDITION

1.No input can be programmed.

2.Some inputs cannot be programmed.

3.Display shows a number or figure different from one touched.

4.Random programming when touching other pads.

5.Display is fixed at some figure and can not accept any input.

CHECK

Check the conn- ection between membrane key assembly and PCB assembly.

Replace key membrane assembly and check operation.

RESULT

Continuity

No continuity

Everything works as specified.

Still have trouble.

CAUSE

Defective PCB assembly.

Loose connection.

Defective key membrane assembly.

Defective PCB assembly.

REMEDY

Replace PCB assembly.

Connect them tightly.

Replace key membrane assembly.

Replace PCB assembly.

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Contents Division Basic Field Manual For Microwave Oven Page Foreword Test the Latch and Switch Sequence Adjustment ProceduresCheck the Door Latch and Switch Closing Adjust the Latch and Switch ClosingLatch Latch Board Trial Operation Precautions on InstallationFeatures and Specifications General Precautions in USESwitch Table SpecificationsSchematic Diagram Overall Circuit Diagram Matrix Circuit for Touch KEY Board Operating Procedures A. Oven Control Panel Easy USE Table Equipment Procedure for Measuring Microwave Energy LeakageMeasuring Microwave Energy Leakage Measurement with the Outer Case RemovedPower Output Measurement Measurement with a Fully Assembled OvenRecord Keeping and Notification After Measurement Important Notes Disassembly InstructionsDoor Assembly / Removal Magnetron Removal FAN Motor Assembly / Removal High Voltage Transformer Removal Removing SensorHigh Voltage Capacitor and Diode Removal Interlock Mechanism Interlock SystemComponents Test Procedure Results Primary Interlock Switch TestSecondary Interlock Switch Test Monitor Switch TestMagnetron Test and Checkout PROCEDURES, and TroubleshootingTest Procedures Components Filament Winding Primary TerminalHigh Voltage CapacitorDiode FAN Motor PowerRelay LevelCheckout Procedures Checkout Procedures for Fuse BlowingProblems Causes YES Good Checkout Procedures for RelayProblem a Problem BPage Condition Cause Remedy Trouble ShootingCondition CheckResult Fuse blows Condition Check Result Cause RemedyCondition Check Result Cause Remedy Check Result Exploded View Door Parts Controller Parts Oven Cavity Parts Latch Board Parts Interior Parts Base Plate Parts Sensor Parts No MFL30502909

721.663398 specifications

The Whirlpool 721.663398 is a versatile refrigerator designed to meet the demands of modern households while providing exceptional performance and energy efficiency. With its sleek design and innovative features, this model stands out in the realm of home appliances, offering both style and functionality.

One of the standout features of the Whirlpool 721.663398 is its spacious interior, which provides ample room for storing groceries and other food items. The refrigerator is designed with adjustable shelves that can be easily configured to accommodate various types of food and beverages, making it a practical choice for families of all sizes. Additionally, the inclusion of door bins adds to the organization, allowing for easy access to smaller items like condiments and snacks.

The refrigerator utilizes advanced cooling technology to maintain optimal temperature levels, ensuring that food remains fresh for longer periods. The adaptive cooling system responds dynamically to fluctuations in temperature, providing consistent cooling performance. This technology not only preserves food quality but also enhances energy efficiency, helping homeowners save on utility bills.

Another impressive characteristic of the Whirlpool 721.663398 is its energy-efficient design. This model is ENERGY STAR certified, meaning it meets strict energy efficiency guidelines set by the U.S. Environmental Protection Agency. Homeowners can enjoy peace of mind knowing that they are reducing their environmental footprint while benefiting from lower energy costs.

In terms of convenience, the Whirlpool 721.663398 features a modern ice maker that provides on-demand ice production, perfect for hosting gatherings or simply keeping drinks cool during hot summer days. The exterior water dispenser offers easy access to clean and filtered water, promoting hydration without the need for bottled alternatives.

The refrigerator is also designed with a user-friendly digital control panel that allows for easy temperature adjustments and settings. This intuitive interface makes managing the appliance straightforward, even for those who might not be tech-savvy.

Overall, the Whirlpool 721.663398 combines style, functionality, and energy efficiency into one cohesive appliance. Its spacious interior, advanced cooling technology, and convenient features make it an excellent choice for those seeking a reliable refrigerator that caters to the needs of modern living. Whether you're stocking up for a large family or hosting social gatherings, this refrigerator is well-equipped to handle it all.
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