Viking VMOC205SS Compu Defrost Cooking, Fire Sensing Feature Microwave Mode, Cooking Sequence

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DMOC205SS

VMOC205SS

The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set according to the menu, supplementary cooking is started. The time of supplementary cooking is determined by experi- ment with each food category and inputted into the LSI.

An example of how sensor works:

4.

Now, the oven is in the convection cooking mode.

5.

When the oven temperature has reached the programmed

 

convection temperature, the oven goes into the

 

programmed cooking mode.

6.

At the end of the COMPU BROIL/ ROAST/ BAKE cycle,

 

the damper is returned to the open position and the oven

 

will go to the off condition. The cooling fan will remain on

1. Potatoes at room temperature.

Vapor is emitted very slowly.

2.Heat potatoes. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks.

3.Sensor detects moisture and humidity and calculates cooking time and variable power.

M

 

ICROW

AVE

 

M

 

AH SENSOR

ICROW

AVE

 

 

 

until the oven has cooled.

COMPU DEFROST COOKING

The COMPU DEFROST key is a special function key to defrost meats and poultry faster and better. COMPU DE- FROST automatically defrosts roast beef, etc.. When the COMPU DEFROST is selected and the food weight is entered by using the COMPU DEFROST pad, the oven will cook according to the special cooking sequence.

FIRE SENSING FEATURE (MICROWAVE MODE)

This model incorporates a sensing feature which will stop the oven's operation if there is a fire in the oven cavity during microwave cooking.

Cooking Sequence.

1. Touch SENSOR COOK pad.

NOTE: The oven should not be operated on SENSOR COOK immediately after plugging in the unit. Wait two minutes before cooking on SENSOR COOK.

2.Select desired Sensor setting.

3.Touch START pad.

The coil of shut-off relay (RY1, RY6) is energized, the oven lamp and cooling fan motor are turned on, but the power transformer is not turned on.

4.After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage is started. The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor.

NOTE: During this first stage, do not open the door or touch STOP/CLEAR pad.

5.When the sensor detects the vapor emitted from the food, the display switches over to the remaining cooking time and the timer counts down to zero. At this time, the door may be opened to stir food, turn it or season, etc.

6.When the timer reaches zero, an audible signal sounds. The shut-off relay and cook relay are de-energized and the power transformer, oven lamp, etc. are turned off.

7.Opening the door or touching the STOP/CLEAR pad, the time of day will reappear on the display and the oven will revert to an OFF condition.

COMPU BROIL/ COMPU ROAST/ COMPU BAKE

COMPU BROIL/ ROAST/ BAKE will automatically compute the oven temperature, microwave power and cooking time for baking, roasting and broiling. Set the desired program by touching the COMPU BROIL/ ROAST/ BAKE pad, and number pad. Enter the weight by touching the Number pads. When the START pad is touched, the following operations occur:

1.The COOK indicator will light and the Convection Fan Symbol will rotate.

2.The cooking time will appear on the display and start counting down to zero. The cooking time is adjusted automatically according to the weight of the food.

3.The shut-off relays (RY1, RY5 and RY6) are energized, turning on the oven lamp, turntable motor, cooling fan motor and convection motor. The power supply voltage is applied to the heating element.

This is accomplished by the LSI repeatedly measuring the voltage across the temperature measurement circuit (ther- mistor) during it's 32-seconds time base comparing the obtained voltage measurements. If the most recent voltage measured is 300mV greater than the previous voltage measured, the LSI judges it as a fire in the oven cavity and switches off the relays to the power transformer, fan motor and convection motor. The LSI also stops counting down and closes the damper door so that no fresh air will enter the oven cavity. Please refer to the following section for a more detailed description.

Operation

Please refer to the timing diagrams below.

1.The thermistor operates within a 32-seconds time base and it is energized for three (3) seconds and off for 29 seconds. Two (2) seconds after the thermistor is energized, the voltage across the temperature measurement circuit is sampled by the LSI and twenty one (21) seconds after the thermistor is cut off the LSI turns on the cooling fan for six (6) seconds.

2.The above procedure is repeated. If the difference between the first voltage measured (in step 1) and the voltage measured when the procedure is repeated (step

2)is greater than 300mV the LSI makes the judgment that there is a fire in the oven cavity and will switch off the relays to the power transformer, fan motor and convection motor. The LSI also stops counting down and closes the damper door so that no fresh air will enter the oven cavity.

3.Once the fire sensor feature has shut the unit down, the programmed cooking cycle may be resumed by pressing the "START" pad or the unit may be reset by pressing the

"CLEAR" pad.

0 2 3

24

30 32 (sec.)

64 (sec.)

6 sec.

CONVECTION

MOTOR ON

OFF

3 sec.

THERMISTOR ON

OFF

ON

Sensing

Voltage OFF

Sensing the voltage across temperature measurement circuit.

10

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Contents Table of Contents Models DMOC205SS VMOC205SSBefore Servicing DMOC205SS VMOC205SS When the testing is completed Before ServicingMicrowave Measurement Procedure Canada Leakage test with enclosure installedRequirements Leakage test without enclosureMicrowave Measurement Procedure USA Leakage testIf provided, Vent Hood, Fan assembly, Cooling Fan Motor Viking Range CorporationMicrowave Ovens DMOC205SS VMOC205SS Foreword Specification DescriptionHigh MIX. Roast Oven Diagram VMOC205SSPower Level P-0 to P-90 Cooking OperationDescription of Operating Sequence OFF ConditionConvection Cooking Condition Automatic MIX Cooking ConditionSensor Cooking Condition Preheating ConditionFire Sensing Feature Microwave Mode Compu Defrost CookingCompu BROIL/ Compu ROAST/ Compu Bake Cooking SequenceSchematic Diagram Figure O-1. Oven Schematic-OFF ConditionFigure O-3. Oven Schematic-Automatic Mix Cooking Condition Description and Function of Components Troubleshooting Guide Damper OPEN-CLOSE MechanismMicrowave Cooking Damper OperationTest Procedure ProblemPower Transformer Test High Voltage Rectifier TestHigh Voltage Capacitor Test Test Procedures Letter Component Test Primary Interlock Switch and Third Door Switch TestMonitor Switch Secondary Interlock System TestDamper Switch Test Checking Temperature in the Convection ModeHeating Element Test Thermistor TestTouch Control Panel Assembly Test Noise Filter TestTest Procedures Letter Component Test KEY Unit Test Weight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level TimeRelay Test Compu Defrost TestSteps Occurrence Cause or Correction AH Sensor TestChecking the initial sensor cooking condition Water load cooking testTesting Method for AH Sensor AND/OR Control Unit Checking Control UnitTouch Control Panel Assembly Description of LSIThermistor LSIIXA103DRTemperature measurement input Oven Thermistor Digit selection signalConvection motor driving signal Cooling fan motor driving signalTOR Segment data signals Segment data signalKey strobe signal Absolute Humidity Sensor Circuit Structure of Absolute Humidity SensorServicing Component Replacement and Adjustment Procedure Power Transformer RemovalOuter Case Removal Magnetron RemovalHigh Voltage Rectifier Assembly Removal Positive Lock Connector NO-CASE Type RemovalDamper Assembly Removal High Voltage Capacitor RemovalOven Lamp and Lamp Socket Removal FAN Motor RemovalThermistor Removal Heating Element RemovalPower Supply Cord Replacement Control Panel Assembly and Control Unit RemovalControl Unit and KEY Unit Door Replacement and Adjustment AdjustmentAfter adjustment, check the following RemovalDoor Disassembly Door AdjustmentAfter adjustment, make sure of the following Microwave Measurement Procedure Preparation For TestingLeakage test Leakage Test with Enclosure Installed RequirementFigure S-1. Pictorial Diagram SFigureControl Panel DIP Parts List Electrical PartsCabinet Parts Control Panel PartsDoor Parts MiscellaneousScrews 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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