Viking VMOC205SS Operation, Description of Operating Sequence, OFF Condition, Cooking Condition

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DMOC205SS

VMOC205SS

OPERATION

DESCRIPTION OF OPERATING SEQUENCE

The following is a description of component functions during oven operation.

OFF CONDITION

Closing the door activates the door sensing switch and secondary interlock switch. (In this condition, the monitor switch contacts are opened.)

When oven is plugged in, 117 volts A.C. is supplied to the control unit. (Figure O-1).

1.The display will show "WELCOME, PRESS CLEAR". To set any program or set the clock, you must first touch

the STOP/CLEAR pad. The display will clear, and " : " will appear.

NOTE: When the door is opened, the oven lamp comes on.

2.A signal is input to the control unit, energizing the coil of shut-off relay (RY-4). RY4 contacts close, completing a circuit to the damper motor. The damper motor now operates moving the damper to the open position, thereby closing the contacts of the damper switch inputs a signal to the control unit. The coil of relay RY- 4 is de-energized, opening its contacts, thereby turning off the damper motor.

COOKING CONDITION

Program desired cooking time Variable Cooking Control by touching the NUMBER pads and the power level pad. When the START pad is touched, the following operations occur:

1.The contacts of relays are closed and components connected to the relays are turned on as follows.

(For details, refer to Figure O-2)

RELAY

CONNECTED COMPONENTS

RY-1

Oven lamp/Turntable motor

 

 

RY-2

Power transformer

RY-3

Heating element

RY-4

Damper motor

RY-5

Convevtion motor

RY-6

Fan motor

2.117 volts A.C. is supplied to the primary winding of the power transformer and is converted to about 3 volts A.C. output on the filament winding, and approximately 2360 volts A.C. on the high voltage winding.

3.The filament winding voltage heats the magnetron filament and the H.V. winding voltage is sent to a voltage doubler circuit.

4.The microwave energy produced by the magnetron is channelled through the waveguide into the cavity feed- box, and then into the cavity where the food is placed to be cooked.

5.Upon completion of the cooking time, the power transformer, oven lamp, etc. are turned off, and the generation of microwave energy is stopped. The oven will revert to the OFF condition.

6.When the door is opened during a cook cycle, third door switch, monitor switch, door sensing switch, the secondary interlock relay and the primary interlock

switch are activated with the following results. The circuits to the turntable motor, the cooling fan motor, and the high voltage components are de-energized, the oven lamp remains on, and the digital read-out displays the time still remaining in the cook cycle when the door was opened.

7.The monitor switch is electrically monitoring the operation of the relay (RY1) and the primary interlock switch and is mechanically associated with the door so that it will

function in the following sequence.

(1)When the door opens from a closed position, the door sensing switch and the primary interlock switch open their contacts, and then the monitor switch contacts close and then the third door switch contacts open.

(2)When the door is closed from the open position, the monitor switch contacts open and the third door switch contacts close first, and then the contacts of the primary interlock switch and the door sensing switch close.

If the relay (RY1) and the primary interlock switch fail with their contacts closed when the door is opened, the closing of the monitor switch contacts will form a short circuit through the monitor fuse, the relay (RY1) and the primary interlock switch, causing the monitor fuse to blow.

POWER LEVEL P-0 TO P-90 COOKING

When Variable Cooking Power is programmed, the 117 volts A.C. is supplied to the power transformer intermittently through the contacts of relay (RY-2). RY-2 is operated by the control unit within an varying time base. Microwave power operation is as follows:

VARI-MODE

ON TIME

OFF TIME

Power 10(P-HI)

32

sec.

0

sec.

(100% power)

 

 

 

 

Power 9(P-90)

30

sec.

2

sec.

(approx. 90% power)

 

 

 

 

Power 8(P-80)

26

sec.

6

sec.

(approx. 80% power)

 

 

 

 

Power 7(P-70)

24

sec.

8

sec.

(approx. 70% power)

 

 

 

 

Power 6(P-60)

22

sec.

10

sec.

(approx. 60% power)

 

 

 

 

Power 5(P-50)

18

sec.

14

sec.

(approx. 50% power)

 

 

 

 

Power 4(P-40)

16

sec.

16

sec.

(approx. 40% power)

 

 

 

 

Power 3(P-30)

12

sec.

20

sec.

(approx. 30% power)

 

 

 

 

Power 2(P-20)

8 sec.

24

sec.

(approx. 20% power)

 

 

 

 

Power 1(P-10)

6 sec.

26

sec.

(approx. 10% power)

 

 

 

 

Power 0(P-0)

0 sec.

32

sec.

(0% power)

 

 

 

 

Note: The ON/OFF time ratio does not correspond with the percentage of microwave power, because approx. 2 seconds are needed for heating of the magnetron filament.

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Contents Table of Contents Models DMOC205SS VMOC205SSBefore Servicing DMOC205SS VMOC205SS When the testing is completed Before ServicingRequirements Microwave Measurement Procedure CanadaLeakage test with enclosure installed Leakage test without enclosureMicrowave Measurement Procedure USA Leakage testViking Range Corporation If provided, Vent Hood, Fan assembly, Cooling Fan MotorMicrowave Ovens DMOC205SS VMOC205SS Foreword Description SpecificationHigh MIX. Roast Oven Diagram VMOC205SSDescription of Operating Sequence Power Level P-0 to P-90 CookingOperation OFF ConditionSensor Cooking Condition Convection Cooking ConditionAutomatic MIX Cooking Condition Preheating ConditionCompu BROIL/ Compu ROAST/ Compu Bake Fire Sensing Feature Microwave ModeCompu Defrost Cooking Cooking SequenceSchematic Diagram Figure O-1. Oven Schematic-OFF ConditionFigure O-3. Oven Schematic-Automatic Mix Cooking Condition Description and Function of Components Microwave Cooking Troubleshooting GuideDamper OPEN-CLOSE Mechanism Damper OperationTest Procedure ProblemHigh Voltage Rectifier Test Power Transformer TestHigh Voltage Capacitor Test Monitor Switch Test Procedures Letter Component TestPrimary Interlock Switch and Third Door Switch Test Secondary Interlock System TestHeating Element Test Damper Switch TestChecking Temperature in the Convection Mode Thermistor TestTouch Control Panel Assembly Test Noise Filter TestRelay Test Test Procedures Letter Component Test KEY Unit TestWeight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Compu Defrost TestChecking the initial sensor cooking condition Steps Occurrence Cause or CorrectionAH Sensor Test Water load cooking testTesting Method for AH Sensor AND/OR Control Unit Checking Control UnitThermistor Touch Control Panel AssemblyDescription of LSI LSIIXA103DRConvection motor driving signal Temperature measurement input Oven ThermistorDigit selection signal Cooling fan motor driving signalTOR Segment data signal Segment data signalsKey strobe signal Absolute Humidity Sensor Circuit Structure of Absolute Humidity SensorServicing Outer Case Removal Component Replacement and Adjustment ProcedurePower Transformer Removal Magnetron RemovalDamper Assembly Removal High Voltage Rectifier Assembly RemovalPositive Lock Connector NO-CASE Type Removal High Voltage Capacitor RemovalThermistor Removal Oven Lamp and Lamp Socket RemovalFAN Motor Removal Heating Element RemovalControl Panel Assembly and Control Unit Removal Power Supply Cord ReplacementControl Unit and KEY Unit After adjustment, check the following Door Replacement and AdjustmentAdjustment RemovalDoor Adjustment Door DisassemblyAfter adjustment, make sure of the following Leakage test Leakage Test with Enclosure Installed Microwave Measurement ProcedurePreparation For Testing RequirementFigure S-1. Pictorial Diagram SFigureControl Panel DIP Cabinet Parts Parts ListElectrical Parts Control Panel PartsMiscellaneous Door PartsScrews Nuts and Washers LX-NZ0029YBE0 Oven and Cabinet Parts Control Panel Parts Door Parts Packing and Accessories DMOC205SS VMOC205SS Copyright 2004 by Viking

VMOC205SS, DMOC205SS specifications

The Viking DMOC205SS and VMOC205SS are two state-of-the-art microwave ovens that redefine cooking convenience and efficiency. Designed for modern kitchens, these appliances come equipped with a range of features and technologies that enhance their usability and performance.

One of the most notable aspects of the Viking DMOC205SS and VMOC205SS is their powerful cooking capabilities. Both models utilize an advanced cooking system that ensures even heat distribution, resulting in perfectly cooked meals every time. With a robust wattage of up to 1,200 watts, these microwaves can quickly and efficiently prepare a wide variety of dishes.

The DMOC205SS features a spacious interior, offering 2.1 cubic feet of cooking space, making it ideal for larger families or those who frequently entertain guests. The VMOC205SS variant also shares a similar capacity but comes with additional features tailored for versatility. The interior design of both models includes a stainless steel finish that not only enhances durability but also adds a touch of elegance to any kitchen.

Functionality is at the forefront of the Viking DMOC205SS and VMOC205SS. Both models are equipped with multiple cooking modes, including microwave, convection, and grilling options. This multi-functional capability allows users to seamlessly switch between cooking methods, ensuring optimal results for various recipes. The intuitive control panel features easy-to-read buttons and a digital display, making it user-friendly for all cooking levels.

In terms of technology, these Viking microwaves incorporate sensor cooking, which automatically detects the moisture and temperature of food, adjusting cooking times accordingly. This feature not only prevents overcooking but also ensures consistently delicious results. The models also come with pre-programmed cooking settings for popular dishes, making meal preparation simpler and quicker.

Energy efficiency is another critical aspect of the Viking DMOC205SS and VMOC205SS. Both models are designed to minimize energy consumption while maximizing performance, which is beneficial for both the environment and the homeowner’s energy bills.

Safety features are embedded within the design of these microwaves. They include a child lock function to prevent accidental use, as well as a timer that ensures food is cooked for the precise amount of time needed.

In summary, the Viking DMOC205SS and VMOC205SS are exceptional microwave ovens that combine advanced technology, practical features, and stylish design. Their powerful cooking capabilities, user-friendly controls, and energy-efficient operation make them a perfect addition to any modern kitchen. These appliances empower users to explore a wide range of cooking possibilities, bringing convenience and quality to meal preparation.
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