Turbo Chef Technologies NGC-1007 Off State, Cool Down, Ready State, Edit Mode, Warm-Up, Soak

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8 THEORY OF OPERATION

GLOSSARY OF COMMON OPERATING TERMS

Off State

All the oven’s control systems are off and the cook cavity temperature is below 150ºF (66ºC).

Cool Down

A subset of the OFF STATE. During COOL DOWN, the oven will circulate the main convection blower until the cook cavity temperature is below 150ºF (66ºC).

Ready State

The oven has successfully warmed to the predefined set temperature. At this point the oven control is ready to receive cook commands via the keypad. The oven will maintain the set temperature in the

READY STATE.

Set Temperature, Cook Cavity (CCSP)

Predefined temperature of the cook cavity at which the oven cooks.

Set Temperature, IR Element (IRSP and IRSI)

IRSP is the set temperature of the IR element during a given cook cycle. Settings are determined on a per-recipe basis. IRSI is the set temperature of the IR element during the READY STATE (or “idle”). IRSI setting can be adjusted in the TEST MODE (page 16).

Actual Temperature, Cook Cavity (TCC)

The actual temperature registered by the cook cavity thermocouple.

Actual Temperature, IR Element (TIR)

The actual temperature registered by the IR element.

Edit Mode

Enables the user to change recipe and CCSP/IRSP temperature settings.

Warm-Up

The mode in which the oven warms itself to the set temperature.

Soak

The mode in which the oven temperature has reached the CCSP, and remains in warmup for an addi- tional 8 minutes to allow cook cavity surfaces to warm. The oven will proceed to soak only if warm-up was initiated when TCC < (CCSP - 126ºF) or TCC < (CCSP - 66ºC).

Cook Cycle

A period of operation as defined by a recipe.

Test Mode

A special diagnostic mode that enables the service technician to turn on and off all oven systems independent of one another, check oven statistics, and set the IRSI.

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Contents Accelerating the World of Cooking For further information call Important Safety Information Please Read First Table of Contents Oven Door Microwave SystemService Parts and Illustrations Schematics and Schematic ComponentsConvection Circuit IR Element and Catalytic ConverterImportant Safety Instructions Grounding Instructions Installation, Specifications, and Maintenance Standard Features DimensionsPower Supply North America ConstructionPower Supply Latin America Power Supply Europe, Asia-PacificPower Supply South Korea Built-In Installation FigureInstallation Near Open Heat Source Figure Initial Power-up SetupOven Restraint Kit TC3-0242 KIT Stacking Remove and Clean the Cooking Surface Remove the Lower Access Panel Clean Oven Interior Clean Lower Access Panel AreaTheory of Operation Chapter Set Temperature, IR Element Irsp and Irsi Set Temperature, Cook Cavity CcspActual Temperature, Cook Cavity TCC Actual Temperature, IR Element TIRKeypad Fault CodeDisplay Self-Test StestFault Codes F1 Blower Running Status Bad F2 Cook Temperature LowF3 Magnetron Current Low F4 Door Monitor DefectiveThermocouple temperature is below the indicated limit F5 Magnetron Over TemperatureF7 Thermocouple Open F8 Heat LowControl System Mech Interlock Switches VDC Power SupplyK1 Mechanical Relay K2 Mechanical RelayBlower Speed Screen Faults ScreenSelf-Test Function Screen Heater Test ScreenElectronic Compartment Temperature Screen Diagnostic Display ScreenChanging the Cook Chamber Temperature Cooks ScreenAltering a Recipe Loading a Menu from a Smart Card Snooze ModeDone Screen Time ScreenEnter Key Code Function/ScreenSmart Card Reader Cable Board J3 connector Replace I/O control board Reference page 54 for a schematic of the I/O control boardPin connector If not, correct the voltage supplyTroubleshooting VAC is going to the motor controller via pins 2Refer to page 50 for motor controller troubleshooting Detailed troubleshootingIf high-limit is not tripped, follow the instructions below Microwave System Voltage Doubler Circuit Description Microwave System Filament and High Voltage Terminals ORG High-Voltage Transformers MagnetronFilament Transformers F3 FuseWave Guide Cover Replacement NGC-3036Kit, Wave Guide Cover Includes Item 31 and sealant Wiring the High-Voltage TransformersScrews, #8, SST NGC-1047Support, Frame Remove the wave guide cover. See Wave GuideProcedure for Measuring RF Leakage Wiring the Filament TransformersHow to Check a Diode Testing the High-Voltage DiodeHow to Check a High-Voltage or Filament Transformer How to Check a CapacitorComponents MagnetronRemove the top and right side covers Back and Enter keys, enter the code 9-4-2-8 and press EnterVoltage Transformers HV capacitor shorted or failing follow troubleshooting onMgtron soft key. Voltage present should be 200 +/- 10% Unplug the oven and replace relay if necessaryPrimary and secondary, the control would have recorded Troubleshooting see F4 MonitorOccurrence. See page 25 as well as Oven Door for Energizing the Microwave SystemOven Door Oven Door Oven Burn-In Procedure Critical Adjustment Notes31 for proper procedure Primary and Secondary Interlock Switch Adjustments and Parts PPHD, Cres Assembly Notes5963 Adjusting the Primary Interlock Switch NEW Switch Setup DIA 80 8198 AR 101Refer to Figures 35 Critical Adjustment Notes FigureActuator and toggle OK Check adjustment and wiring on Interlock switch statusNew setup for the proper adjustment procedure Door does not close freely Remove obstructions or readjustConvection Circuit Motor Controller Bmsc Main Convection HeaterHigh Limit Thermostat Convection Motor114 105 104 103 102 107 109 110 113 111108 106† Thermostat tripped Reset and determine why the thermostat Replace motor. For access to motor shaft, remove top panelCook Door Open Message Verify which switch is not actuating Readjust. See pages† Motor spins freely Verify motor windings see table below Verify motor spins freelyDisconnect control wiring Plug on schematics pages 55-63 while incrementing blowerConverter Removing the IR Element IR ElementCatalytic Converter Installing a New IR Element Removing and Installing the Catalytic Converter119 122Schematics and Schematic Components Low Voltage Components Wire Harness Replacement P/NsLine Voltage Components Board Schematic Schematic Tornado NGC MAG Schematic Tornado Ngcew Schematic Tornado Ngced Schematic Brazil NGC Service Parts and Illustrations Relay Control SystemService Parts and Illustrations Monitor Circuit Shown in Failsafe State Microwave SystemWave Guide/Wave Guide Cover Parts Microwave System PartsSBK Oven DoorDoor Switch Parts Primary and Secondary Interlock Switch PartsPrimary Safety Switch Parts Monitor Safety Switch Parts80 81 Secondary and Monitor Safety Switch Parts Oven Door Parts 100Convection Circuit Convection Circuit Block Diagram114 105 104 103 102 107 108 106 109 110 113 111 112 Convection Circuit Parts123 Old Switch Setup 126 Wire Harness Replacement P/NIR Element and Catalytic Converter 122 119135 137 138 133 134 129 132 144 139 141150 Screw, #8-32 x 3/8, Pphd NGC-2011-8 147 150 162 157 159153 155 156 151 152 Comprehensive Part List Comprehensive Part List Comprehensive Part List Relay, K7, Magnetron Fan, Standard Europe, Asia-Pacific MPh Smart Card, Programmed call TurboChef for Part Numbers 800.90T U R B O or