Viking VMOC205SS Heating Element Test, Thermistor Test, Damper Motor Test, Damper Switch Test

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DMOC205SS

VMOC205SS

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

MAGNETRON THERMAL CUT-OUT (on the waveguide)

A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the temperature of the thermal cut-out reaches approximately 257οF (125οC).

An open thermal cut-out indicates overheating of the magnetron. Check for restricted air flow to the magnetron through the vent holes of the oven cavity, especially the cooling duct and cooling fan.

CAUTION: IF THE THERMAL CUT-OUT INDICATES OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THE THERMAL CUT-OUT.

CONVECTION CUT-OUT (on side of the heater duct)

A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the temperature of thermal cut-out reaches 302οF (150οC). The thermal cut-out resets automatically at approximately 266οF (130οC). If the thermal cut-out has operated under the normal condition, replace the thermal cut-out. An open thermal cut-out indicates overheating of heater unit, check for restricted air flow to the heater unit through the vent hole of the oven cavity, especially the heater duct and convection fan.

JHEATING ELEMENT TEST

Make sure the heating element is fully cooled and test as follows;

a.Disconnect wire leads and measure the resistance with an ohmmeter. On the R x 1 scale, the resistance between the heating element terminals should be approximately 10.2Ω.

b.Disconnect wire leads and measure the insulation resistance with 500V - 100MΩ insulation

resistance meter. The insulation resistance between heating element terminal and cavity should be more than 0.5MΩ.

KTHERMISTOR TEST

Disconnect connector-E from the control unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to Pin No’s E-3 and E-4.

Room Temperature

Resistance

68οF(20οC) - 86οF(30οC)

Approx. 350kΩ - 155KΩ

If the meter does not indicate above resistance, replace the thermistor

LDAMPER MOTOR TEST

When the power cord is plugged into the wall receptacle and 117 volts A.C. is supplied to the damper motor, the motor operates until the damper is opened and the damper switch closes. Then the damper motor stops operation.

If the damper motor does not operate, check for A.C. voltage with a voltmeter at the motor.

1.Disconnect the power cord from the wall receptacle.

2.Disconnect the wire leads of motor and connect the meter leads to the wire leads of main wire harness.

3.Re-connect the power cord into the wall receptacle.

If 117 volts A.C. is indicated at the wire leads, replace the motor and if 117 volts A.C. is not indicated, check the wire harness and control unit.

MDAMPER SWITCH TEST

Disconnect the wire leads from the switch terminals and connect ohmmeter leads to the common (COM.) and normally open (N.O.) terminals of the switch.

1.When switch actuator is pushed by the damper motor cam, the meter should be indicated a closed circuit.

2.When power cord is plugged into the wall receptacle, the damper motor operates and damper cam will start to rotate. When the switch actuator is released, the meter should be indicated an open circuit. If improper operation is indicated, replace the damper switch.

NCHECKING TEMPERATURE IN THE CONVECTION MODE

It is difficult to measure the exact temperature in the convection oven. An accurate thermocouple type

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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 testMicrowave Ovens DMOC205SS VMOC205SS Foreword If provided, Vent Hood, Fan assembly, Cooling Fan MotorViking Range Corporation High MIX. Roast SpecificationDescription 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 ProblemHigh Voltage Capacitor Test Power Transformer TestHigh Voltage Rectifier 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 Key strobe signal Segment data signalsSegment data 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 RemovalControl Unit and KEY Unit Power Supply Cord ReplacementControl Panel Assembly and Control Unit Removal Door Replacement and Adjustment AdjustmentAfter adjustment, check the following RemovalAfter adjustment, make sure of the following Door DisassemblyDoor Adjustment 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 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

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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