Cooking Products Service Manual

Original March 1997

4322167

© 1997 Whirlpool Corporation

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THEORY OF OPERATION

The microwave oven is powered by the 120- volt line. Whenever the door is closed and a cooking function is programmed through the control panel’s keypad, relay contacts on the control board close, and complete a circuit from the L1 side to the neutral side of the line.

The control board uses five relays to operate

Relay 4 controls the speed of the blower motor through the contol panel. The base thermal fuse will also turn the blower motor on to its low speed if the temperature reaches 133˚F. The schematic configuration for relay 4 is shown in the following diagram. The relay is explained in further detail on the following page.

the various functions of the microwave oven (see below). The relays are controlled by the microcomputer on the control board, and per- form the functions shown below.

RELAY 4

L1

(C)

(NO) (NC)

BLOWER (HI)

MOTOR

BASE

(LOW)

(C)

THERMAL

 

FUSE

 

Relay 1

Oven Light/Fan & Stirrer Motors

Relay 2

High Voltage Section

Relay 3

Low-Speed Blower Motor

Relay 4 (N.C. Contacts)

Auto Low-Speed Blower Motor

Relay 4 (N.O. Contacts)

High-Speed Blower Motor

Relay 5

Turntable Motor

 

MICROCOMPUTER

CONTROL

 

CIRCUIT

 

BOARD

 

CN3

 

 

RELAY RY2

RELAY RY1

RELAY RY4

RELAY RY3

RELAY RY5

 

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Whirlpool 1997 E service manual Theory of Operation

1997 "E specifications

The Whirlpool 1997 "E" is a notable refrigerator model that reflects the company's commitment to innovation and consumer convenience during the late 1990s. This model encapsulated both style and functionality, aiming to meet the evolving needs of households.

One of the standout features of the Whirlpool 1997 "E" is its Energy Saver technology. As energy efficiency became a paramount concern for consumers, this refrigerator was designed to minimize electricity consumption while maintaining optimal cooling performance. The appliance featured enhanced insulation and a high-efficiency compressor, allowing it to use less energy than many of its predecessors.

The design of the Whirlpool 1997 "E" was another highlight. It featured a sleek and modern aesthetic, available in several finishes including classic white, elegant black, and stainless steel. The exterior was complemented by smooth curves and a user-friendly interface, offering an appealing look that fit seamlessly into various kitchen decors.

Inside, the refrigerator came equipped with adjustable shelving and a spacious interior layout, allowing users to customize storage according to their needs. The easy-to-clean surfaces and removable shelves made maintenance simple, further enhancing the user experience. The model also included dedicated compartments for fruits and vegetables, with humidity controls to prolong freshness.

Another key technological advancement in the Whirlpool 1997 "E" was its advanced cooling system. Featuring MultiFlow technology, this model ensured a consistent temperature throughout the refrigerator and freezer compartments. This technology worked by circulating cold air across different shelves, minimizing temperature fluctuations that could affect food preservation.

The refrigerator also boasted features like a water filtration system, which improved the taste and quality of water dispensed through its integrated dispenser, providing convenience for families on the go.

Overall, the Whirlpool 1997 "E" set a benchmark for kitchen appliances in its era, combining energy efficiency, user-friendly design, and innovative technology. This model showcased Whirlpool's dedication to providing practical solutions that catered to the needs of contemporary households, making it a popular choice for many consumers. Its legacy continues to influence refrigerator designs in the years that followed, marking it as a significant player in the realm of home appliances.