Viking DMOC205SS, VMOC205SS Convection Cooking Condition, Automatic MIX Cooking Condition

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CONVECTION COOKING CONDITION

PREHEATING CONDITION

Program desired convection temperature by touching the CONVECTION pad and the Temperature pad.

When the START pad is touched, the following operations occur:

1.The coil of shut-off relays (RY1, RY3,RY5 and RY6) are energized, the oven lamp, cooling fan motor, turntable motor and convection motor are turned on.

2.The coil of relay (RY4) is energized by the control unit. The damper is moved to the closed position, opening the damper switch contacts. The opening of the damper switch contacts sends a signal to the LSI on the control unit de-energizing the relay (RY4) and opening the circuit to the damper motor.

3.The coil of heater relay (RY3) is energized by the control unit and the main supply voltage is applied to the heating element.

4.When the oven temperature reaches the selected preheat temperature, the following operations occur:

4-1 The heater relay is de-energized by the control unit temperature circuit and thermistor, opening the circuit to the heating element.

4-2. The oven will continue to function for 30 minutes, turning the heater on and off, as needed to maintain the selected preheat temperature. The oven will shut-down completely after 30 minutes

CONVECTION COOKING CONDITION

When the preheat temperature is reached, a beep signal will sound indicating that the holding temperature has been reached in the oven cavity. Open the door and place the food to be cooked in the oven.

Touch the CONVEC pad first and then touch the Tempera- ture pad. And program desired cooking time by touching the Number pads.

When the START pad is touched, the following operations occur:

DMOC205SS

VMOC205SS

first. And then program desired cooking time by touching the Number pads. The LOW MIX/BAKE pad is preprogrammed for 350οF with 10% microwave power, while the HIGH MIX/ROAST pad is preprogrammed for 300οF with 30% microwave power. When the START pad is touched, the following operations occur:

1.The numbers on the digital read-out start to count down to zero.

2.The shut-off relays (RY1,RY2,RY3,RY5 and RY6) are energized, turning on the oven lamp, turntable motor, cooling fan motor and convection fan motor.

3.The shut-off relay (RY4) is energized.

The damper door is closed from the open position.

4.The heater relay (RY3) is energized, applying the main supply voltage to the heating element.

5.Now, the oven is in the convection cooking condition.

6.When the oven temperature reaches the selected temperature, the following operations occur:

6-1. The power supply voltage is alternated to the heating element and power transformer.

6-2. The heating element operates through the heater relay (RY3) contacts and the power transformer operates through the primary interlock relay (RY2) contacts.

6-3. These are operated by the control unit to supply alternately within a 32 second time base, convection heat and microwave energy.

The relationship between the convection and microwave power operations are as follows.

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

6 SEC.

26 SEC.

ON

 

(MICRO.)

MICROWAVE POWER

= APPROX. 10%

OFF

1. The numbers on the digital read-out start to count down

to zero.

(CONVEC.)

CONVECTION

2. The oven lamp, turntable motor, cooling fan motor and

convection motor are energized.

3. Heater relay (RY3) is energized (if the cavity temperature

is lower than the selected temperature) and the main

supply voltage is applied to the heating element to return

to the selected cooking temperature.

4. Upon completion of the cooking time, the audible signal

will sound, and oven lamp, turntable motor, cooling fan

motor and convection motor are de-energized. At the

end of the convection cycle, if the cavity air temperature

is above 275οF, the circuit to RY6 will be maintained (by

the thermistor circuit) to continue operation of the cooling

fan motor until the temperature drops below 245οF, at

which time the relay will be de-energized, turning off the

fan motor. Relay RY5 will however, open as soon as the

convection cycle has ended, turning off the convection

fan motor.

5. At the end of the convection cook cycle, shut-off relay

(RY4) is energized turning on the damper motor. The

damper is returned to the open position, closing the

damper switch contacts which send a signal to the

control unit, de-energizing shut-off relay (RY4).

AUTOMATIC MIX COOKING CONDITION

Touch the HIGH MIX/ROAST or the LOW MIX/BAKE pad

TEMPERATUE

= 350°F (180°C)

LOW MIX

BAKE

12 SEC.

20 SEC.

 

ON

 

(MICRO.)

OFF

MICROWAVE POWER

= APPROX. 30%

 

 

ON

 

(CONVEC.)

 

CONVECTION

OFF

 

 

32 SEC.

TEMPERATUE

 

= 300°F

 

 

 

HIGH MIX

 

 

ROAST

 

Note: During alternate Microwave/Convection operation, the convection heater is energized only if the cavity temperature drops below the set temperature.

SENSOR COOKING CONDITION

Using the SENSOR COOK function, the foods are cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results.

When the food is cooked, water vapor is developed.

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Contents
Models DMOC205SS VMOC205SS Table of ContentsBefore Servicing DMOC205SS VMOC205SS Before Servicing When the testing is completedLeakage test without enclosure Microwave Measurement Procedure CanadaLeakage test with enclosure installed RequirementsLeakage test Microwave Measurement Procedure USA Microwave Ovens DMOC205SS VMOC205SS Foreword If provided, Vent Hood, Fan assembly, Cooling Fan Motor Viking Range Corporation High MIX. Roast SpecificationDescription VMOC205SS Oven DiagramOFF Condition Power Level P-0 to P-90 CookingOperation Description of Operating SequencePreheating Condition Convection Cooking ConditionAutomatic MIX Cooking Condition Sensor Cooking ConditionCooking Sequence Fire Sensing Feature Microwave ModeCompu Defrost Cooking Compu BROIL/ Compu ROAST/ Compu BakeFigure O-1. Oven Schematic-OFF Condition Schematic DiagramFigure O-3. Oven Schematic-Automatic Mix Cooking Condition Description and Function of Components Damper Operation Troubleshooting GuideDamper OPEN-CLOSE Mechanism Microwave CookingProblem Test ProcedureHigh Voltage Capacitor Test Power Transformer TestHigh Voltage Rectifier Test Secondary Interlock System Test Test Procedures Letter Component TestPrimary Interlock Switch and Third Door Switch Test Monitor SwitchThermistor Test Damper Switch TestChecking Temperature in the Convection Mode Heating Element TestNoise Filter Test Touch Control Panel Assembly TestCompu Defrost Test Test Procedures Letter Component Test KEY Unit TestWeight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Relay TestWater load cooking test Steps Occurrence Cause or CorrectionAH Sensor Test Checking the initial sensor cooking conditionChecking Control Unit Testing Method for AH Sensor AND/OR Control UnitLSIIXA103DR Touch Control Panel AssemblyDescription of LSI ThermistorCooling fan motor driving signal Temperature measurement input Oven ThermistorDigit selection signal Convection motor driving signalTOR Key strobe signal Segment data signalsSegment data signal Structure of Absolute Humidity Sensor Absolute Humidity Sensor CircuitServicing Magnetron Removal Component Replacement and Adjustment ProcedurePower Transformer Removal Outer Case RemovalHigh Voltage Capacitor Removal High Voltage Rectifier Assembly RemovalPositive Lock Connector NO-CASE Type Removal Damper Assembly RemovalHeating Element Removal Oven Lamp and Lamp Socket RemovalFAN Motor Removal Thermistor RemovalControl Unit and KEY Unit Power Supply Cord ReplacementControl Panel Assembly and Control Unit Removal Removal Door Replacement and AdjustmentAdjustment After adjustment, check the followingAfter adjustment, make sure of the following Door DisassemblyDoor Adjustment Requirement Microwave Measurement ProcedurePreparation For Testing Leakage test Leakage Test with Enclosure InstalledFigure S-1. Pictorial Diagram SFigureControl Panel DIP Control Panel Parts Parts ListElectrical Parts Cabinet PartsScrews Nuts and Washers Door PartsMiscellaneous LX-NZ0029YBE0 Oven and Cabinet Parts Control Panel Parts Door Parts Packing and Accessories DMOC205SS VMOC205SS Copyright 2004 by Viking
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