Table of Contents Important Safety Instructions General Safety Information Reducing Fire Risk Precautions to be Observed Before and During Servicing to Avoid Possible Exposure to Excessive Microwave Energy Grounding Instructions Power Cord Replacement RF Interference Considerations Chapter 1: Installation, Specifications and Maintenance Specs and Dimensions Dimensions Construction...
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Programming Oven Options User Configurable Options - Enable/Disable Codes User Configurable Options - Access Codes Control System Panel Parts Control System Troubleshooting Chapter 5: The Microwave System Voltage Doubler Circuit Description Monitor Circuit Description Voltage Doubler Theory of Operation Microwave System Parts Microwave System Components Wave Guide Cover Replacement Wave Guide/Wave Guide Cover Parts...
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Schematic - I/O Board Oven Schematics 55 - 63 Chapter 10: Service Parts and Illustrations Figure 7: NGC (Tornado) Control System Figure 17: Control System Panel Enclosure and Parts Figure 18: Monitor Circuit - Shown in Failsafe State Figure 20: Microwave System Parts...
INTRODUCTION IMPORTANT SAFETY INSTRUCTIONS Strictly adhere to the following safety precautions to reduce the risk of: Burns Electric shock Fire Injury Damage to oven or property near oven Exposure to excessive microwave energy GENERAL SAFETY INFORMATION Read all instructions before using the appliance. Install or locate this appliance only in accordance with the provided installation instructions.
RF INTERFERENCE CONSIDERATIONS ® The NGC (Tornado ) oven generates radio frequency signals. This device has been tested and was determined to be in compliance with applicable portions of FCC part 18 requirements and to the protection require- ments of Council Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility at the time of manufacture.
INSTALLATION, SPECIFICATIONS, AND MAINTENANCE 1 : NGC (Tornado) Dimensions F I G U R E SPECS AND DIMENSIONS Standard Features Recirculating airpath with patented catalytic converter Dimensions system E X T E R I O R C O O K C A V I T Y...
24 Circuit Breaker: Type D, min. 20 Amps hours in order to file a claim. TurboChef is not responsible if the product is damaged in shipment. NGC ED (3-phase) Remove all literature and accessories from the carton.
12" (305 mm) between the oven and the divider. Installation Near Open Heat Source (Figure 3) When placing a TurboChef oven near an open heat The height of the divider must be greater than or source, strictly adhere to the following:...
400 lbs (181 kg). 2. Allow ovens adequate time to cool and unplug them 3. If you are stacking ovens on a TurboChef oven cart (24” = NGC-1217-1, 18” = NGC-1217-2), make sure that the bottom oven is bolted to the cart and the wheels are locked.
TurboChef Oven Cleaner ® Using a damp towel, remove large food particles. When cleaning the oven, use only TurboChef Oven If stubborn stain is present, sparingly spray Cleaner. Any other cleaning products can damage TurboChef Oven Cleaner onto the stain.
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SYSTEM ability to control each mechanism independently, heating the inside. the NGC (Tornado) oven is able to reduce the cook time of most foods by 70-90 percent. Part numbers are included on illustrations (where applicable) and in the back of this manual. If an Figure 5 below represents the oven’s different sys-...
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 150 º F (66 º C). Cool Down A subset of the . During , the oven will circulate the main convection blower until OFF STATE COOL DOWN the cook cavity temperature is below 150 º...
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THEORY OF OPERATION Keypad The primary interface for the operator. Display Displays all visual information to the operator. Self-Test (STEST) A special diagnostic function that tests all critical subsystems to determine their operational state. Recipe A set of user-defined Events that determine a cook cycle. Events A single operational element that is a part of a recipe.
FAULT CODES ® The NGC (Tornado ) oven has the ability to continual- NGCVXXXX XXXXXX ly monitor and log various fault conditions. Some S/N XXXXXX fault conditions will terminate cook cycles, while COOK COUNT others will not. Please refer to the fault code table F1 BLOWER on page 12 for more detailed information.
FAULT CODES : Door interlock switches are in parallel. See thermocouple temperature is below the indicated N O T E , pages 55-63. The fault is moni- limit. OVEN SCHEMATICS tored during a cook cycle, or in when the SELF TEST microwave is on.
VOLTAGE INPUT COMMON COMMON SENSOR U.S. ONLY A (-) IR THERMOCOUPLE C (+) A (-) DISPLAY EC THERMOCOUPLE C (+) A (-) CC THERMOCOUPLE C (+) KEYPAD ® 7 : NGC (Tornado ) Control System F I G U R E...
THE CONTROL SYSTEM CONTROL SYSTEM COMPONENT DESCRIPTIONS IR Thermocouple Type K Thermocouple. Embedded in the IR ele- 24 VDC Power Supply ment, the IR thermocouple measures the inter- 24 VDC output at 40 watts. Supplies control nal/sheath temperature of the IR element. Valid IR voltage for I/O control board, 24 VDC mechanical set points are between 500 º...
THE CONTROL SYSTEM TEST NGC XXXXX TEST NGC XXXXX CC 81 IR 500 CC 81 IR 500 BLOWER HEATER DIAG ELEC FAULTS MGTRON COOKS STEST IR ELE ACCUM IR SI P S M P S M 8 : Accessing Test Mode 9 : Test Mode - Screen 1 1 0 : Test Mode - Screen 2 F I G U R E...
THE CONTROL SYSTEM Diagnostic Display (Screen 2) STATUS INDICATORS key turns on or off the diagnostic display DIAG See Figures 9 and 10 on page 15. feature. When this feature is enabled, the oven will Primary switch – closed or open display temperature and cook cycle parameters when Secondary switch –...
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Valid temperatures are between 500 º F (260 º C) Most NGC (Tornado) oven models contain 128 and 1150 º F (621 º C). unique recipes. The display shows two ( 2) pages each with eight ( 8) recipe groups.
THE CONTROL SYSTEM Loading a Menu from a Smart Card OVEN OPTIONS 1. Ensure the oven is in the Done Screen OVEN OFF COOLING mode. To enable/disable the Done Screen (Figure 15), see DOWN the next page. Enable the Done Screen to: 2.
THE CONTROL SYSTEM USER CONFIGURABLE OPTIONS - ENABLE/DISABLE CODES The following codes enable disable each function/screen listed. They do not take you to the function/screen. After each code, press . To enable, press 9 after entering code (except ). To disable, press ENTER any key (except 9) after entering code.
THE CONTROL SYSTEM CONTROL SYSTEM TROUBLESHOOTING ISSUE RESOLUTION No Display (Blank) 1. Verify power 208 VAC or 240 VAC is going to the oven correctly. If not, correct the voltage supply. 2. Control DOES NOT beep when any key on the keypad is pressed. Check power going to the 24VDC power supply.
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THE CONTROL SYSTEM ISSUE RESOLUTION F1: Blower Running 1. Status Indicator “A” is highlighted/backlit in TEST MODE Status Bad Verify 208 or 240 (USA) / 230 (Intl) / 200 (Japan) / 220 (Latin America) VAC is going to the motor controller via pins 2 and 3. Motor not running 208/240/230 VAC is present: Verify control wiring from the motor when commanded.
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THE CONTROL SYSTEM ISSUE RESOLUTION F2: Cook Temperature 1. Verify the high-limit thermostat is not tripped. If high-limit is tripped, reset and allow the oven to warm up. If high-limit is not tripped, follow the instructions below. High-limit thermostat is not tripped. Place a small water load in a microwave/heat-resistant container (approx.
THE MICROWAVE SYSTEM is the most complex system in If during normal operation any of the interlock The Microwave System the oven. Proper care must be taken during servicing switches open - such as when the oven door opens to protect both the operator and technician. - the control will turn off the microwave.
THE MICROWAVE SYSTEM TRANSFORMER OUTPUT VOLTAGE MAGNETRON VOLTAGE +(B) +(B) +2400 V -4800 V -2400 V -(C) -(C) 2400 2400 4800 2400 Current 2400 Current Flow Flow CAPACITOR CHARGES CHARGED CAPACITOR PLUS TRANSFORMER ON POSITIVE VOLTAGE SWING ON NEGATIVE VOLTAGE SWING 1 9 : Voltage Doubler Circuit Theory of Operation F I G U R E VOLTAGE DOUBLER THEORY OF OPERATION...
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THE MICROWAVE SYSTEM FILAMENT AND HIGH VOLTAGE TERMINALS COOLING (ORG) FINS (BLK) ANTENNA 2 1 : Microwave System Parts 2 0 : Microwave System Parts F I G U R E F I G U R E 13. 100481 High Voltage Diode (x2) 15.
THE MICROWAVE SYSTEM MICROWAVE SYSTEM COMPONENTS High Voltage Capacitors Capacitor rating is 0.91uF, 2500 VDC for USA, Below is a description of each component within Mexico, Brazil, and S. Korea. the Microwave System. Capacitor rating is 1.15 uF, 2500 VDC for Magnetron Europe, Asia, Pacific, Australia, UK, Ireland, and Magnetrons supply the RF energy at 2.45 GHz...
THE MICROWAVE SYSTEM 2 2 : Wave Guide Cover/Wave Guide Removal and Replacement F I G U R E To determine software type, 1. Locate the fourteen (14) #8 sheet metal screws 1. Make sure the oven is in the securing the broken wave guide cover.
N O T E : Be careful to not damage the insulation N O T E temperature RTV as supplied by TurboChef. when removing the wave guide. 6. Place the new wave guide cover in place. Secure 6. Install the new wave guide using the mounting...
THE MICROWAVE SYSTEM high-voltage transformers are most likely wired in- phase. As a last check, energize the Microwave System and verify the voltages between the taps on each high-voltage transformer. The wiring issue must be corrected prior to returning the oven to service, as the voltages must be: : 208 VAC between 1 &...
THE MICROWAVE SYSTEM FILAMENT AND HIGH VOLTAGE TERMINALS ANTENNA 2 4 : High Voltage Diode F I G U R E 2 5 : Magnetron F I G U R E 5. While holding the soft key, move the sur- former goes to 2400 VPK, the high-voltage capacitor is MGTRON vey meter around the outline of the oven door,...
THE MICROWAVE SYSTEM How to Check a Capacitor 3. An ohmmeter connected between the filament 1. Disconnect the oven from the power source. terminals (F, FA) should indicate a reading of 2. Fully discharge the capacitor. less than 1 ohm. Figure 25. 3.
JAPAN If proper amperage appears but takes longer than 2 complete seconds to appear, call TurboChef Tech support for assistance. If amperage is present but lower than typical readings, perform the troubleshooting steps in the previous pages of this section. If amperage is not present, check the condi- tion of the F3 fuse.
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THE MICROWAVE SYSTEM ISSUE RESOLUTION F3: Magnetron : Never try to check the secondary voltages of the High W A R N I N G Current Low (cont.) Voltage Transformers. With the top cover removed, safe access to the three (if US oven)/two (if International oven) terminals on the of the transformers is available.
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THE MICROWAVE SYSTEM ISSUE RESOLUTION F3 Fuse Blown, cont. c. Monitor circuit fault: Verify operation of all interlock switches. In addition, check the Fault Log. If the monitor switch opened prior to the primary and secondary, the control would have recorded the occurrence.
3. Locate and remove the #38 screws (3 each side). The proper fit and adjustment essential for safe and reliable operation of the NGC 4. Remove the plastic caps. (Tornado) oven. : The 10x32 screws do not need to be NOTE The oven door provides three primary functions: removed, as they are used for adjusting the door.
THE OVEN DOOR : Check for excessive Microwave ADJUSTING THE OVEN DOOR W A R N I N G Leakage after adjusting the Cook Door. See : Procedure should be done while W A R N I N G page 31 for proper procedure. oven is hot.
THE OVEN DOOR 2 8 : Mis-adjusted Oven Door 2 7 : Mis-adjusted Oven Door F I G U R E F I G U R E 3. Open and close the door several times to ensure it because the door can move as a result of temper- closes smoothly and the door actuator (Item 47) ature change.
THE OVEN DOOR ADJUSTING THE MONITOR SWITCH - OLD SETUP APPLY HI TEMP GREASE TO AREA The old switch assembly is identifiable by the moni- tor switch being located on the right hinge assembly. Also, the serial number of the oven will follow this formatting (X = variable digit/letter): NGC-XXXXX (North America) NGCXX-XXXXX (International)
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THE OVEN DOOR 3 0 : Door Switch Assembly and Parts - Old Switch Setup F I G U R E 3 1 : Monitor Switch Adjustment and Assembly - F I G U R E Old Switch Setup...
THE OVEN DOOR APPLY HI TEMP GREASE TO AREA 3 2 : Primary Switch Adjustment and Parts - F I G U R E New Switch Setup ADJUSTING THE PRIMARY INTERLOCK SWITCH - PRIMARY SWITCH ADJUSTMENT AND PARTS NEW SWITCH SETUP Figure 32 The new switch assembly is identifiable by the pri- 70.
THE OVEN DOOR 81 82 3 3 : Secondary/Monitor Adjustment and Parts - 3 4 : Secondary/Monitor Switch Assembly - F I G U R E F I G U R E New Switch Setup New Switch Setup disengage in sequence. ADJUSTING THE SECONDARY AND MONITOR 9.
THE OVEN DOOR SHUNT CAVITY/PLATE SHUNT ASSY/DOOR COVER Tightening Sequence Tightening Sequence 3 6 : Oven Door Assembly: Tightening Specs F I G U R E Critical Adjustment Notes (Figure 35) SCREW TORQUE CHART 1. Orient with the gasket seam at the bottom of Refer to Figures 35, 36.
THE OVEN DOOR INTERLOCK SWITCH TROUBLESHOOTING ISSUE RESOLUTION “Cook Door Open” Determine which interlock switch is open. Access to view TEST MODE Message interlock switch status. M - Primary and/or secondary interlock is open (old switch setup). SM - Primary interlock is open (new switch setup). Verify action of the latch assembly and oven door.
THE CONVECTION CIRCUIT provides the high-temperature The Convection Circuit Motor Controller (BMSC) airflow required to brown and cook food items. The motor controller is proprietary and will only operate the convection motor described above. The motor controller is controlled on command from the CONVECTION CIRCUIT COMPONENTS The following is a description of each component I/O control board and a 0-10VDC speed command...
THE CONVECTION CIRCUIT 3 8 : Convection Circuit Assembly and Parts/Item 105 (Blower Motor) Detail F I G U R E CONVECTION CIRCUIT/BLOWER MOTOR PARTS 112. NGC-3005 Relay, K4/K5 SSR 113. 100592 Fuses, F1 and F2 (12 Amp) Figure 38 114.
THE CONVECTION CIRCUIT CONVECTION CIRCUIT TROUBLESHOOTING ISSUE RESOLUTION F8: Heat Low 1. Check that the blower motor is moving air. Blower motor is not moving air: Check blower motor assembly Oven Not Warming Up and verify motor is stalled. Unplug oven and correct obstruction or replace motor.
THE CONVECTION CIRCUIT ISSUE RESOLUTION F1: Blower Running 1. Verify motor spins freely. Status Bad Motor seized: Unplug oven and correct obstruction or replace motor. Motor spins freely: Verify motor windings (see table below). 2. Verify motor windings are OK. Measure the resistance between windings and chassis.
Oven Cleaner and rinse ® catalytic converter section below. thoroughly with distilled water. Let the catalytic converter air dry before reinstalling. If TurboChef ® Oven Cleaner is not available, do not use a substi- COMPONENTS tute. Use distilled water only.
Figure 39 : Clean catalytic converter using C A U T I O N 116. 101312 Snap Ring only TurboChef cleaner (P/N 103180 USA, 117. 102449 Washer, Shim 103380 Intl). Use of other chemicals will 118. NGC-3003 IR Element irreparably damage catalyst.
SCHEMATIC COMPONENTS Keypad, NGC Oven FIGURES 40 THRU 45: NGC OVEN SCHEMATICS Switch, Primary Interlock Figure 40 I/O Board Schematic Switch, Secondary Interlock Figure 41 NGC US Schematic Switch, Monitor Safety Figure 42 NGC UK Schematic Thermocouple, CC Figure 43 NGC EW Schematic Thermocouple, EC Figure 44...
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I/O BOARD SCHEMATIC 4 0 : I/O Control Board and Test Point Locations F I G U R E...
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NGC (US) SCHEMATIC NOTES: 1. SCHEMATIC SHOWS OVEN WITH DOOR OPEN AND WITHOUT POWER APPLIED DRAWING OF 40-PIN CONNECTOR DRAWING OF HV TRANSFORMERS SAFETY INTERLOCKS MONITOR BL150 SWITCH K6 VOLTS OR270 PRIMARY INTERLOCK BR280 RD-20 24VDC POWER OR440 BK-16 SUPPLY BR420 BR450 SECONDARY...
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NGC (UK) SCHEMATIC NOTES: 1. SCHEMATIC SHOWS OVEN WITH DOOR OPEN AND WITHOUT POWER APPLIED DRAWING OF 40-PIN CONNECTOR BL 33 BL 34 BLK 19 G REEN M3 WHITE 240 VAC BLK 40 M2 RED 3 PHASE M1 BLK SPLICE 1 BMSC HV TRANSFORMERS 1-2 = 230VAC...
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NGC (EW) SCHEMATIC NOTES: 1. SCHEMATIC SHOWS OVEN WITH DOOR OPEN AND WITHOUT POWER APPLIED DRAWING OF 40-PIN CONNECTOR BL 33 BL 34 BLK 19 GREEN M3 WHITE 240 VAC BLK 40 M2 RED 3 PHASE M1 BLK BMSC S PLICE 1 HV TRANSFORMERS 1-2 = 230VAC 0 -1 0V...
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NGC (ED) SCHEMATIC NOTES: 1. SCHEMATIC SHOWS OVEN WITH DOOR OPEN AND WITHOUT POWER APPLIED DRAWING OF 40-PIN CONNECTOR BL 33 BL 34 BLK 19 GREEN M3 WHITE 240 VAC BLK 40 M2 RED 3 PHASE M1 BLK S PLICE 1 HV TRANSFORMERS BMSC 1-2 = 230VAC...
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SERVICE PARTS AND ILLUSTRATIONS FIGURE 7: NGC (TORNADO) CONTROL SYSTEM Chapter 4: The Control System - Page 13 +24VDC DUAL MECH MECH MECH MECH RELAY RELAY RELAY RELAY (U.S. ONLY) 3(+) 4(-) 3(+) 4(-) + 24 VDC - + 24 VDC -...
SERVICE PARTS AND ILLUSTRATIONS FIGURE 18: MONITOR CIRCUIT - SHOWN IN FAILSAFE STATE Chapter 5: The Microwave System - Page 25 PRIMARY AND SECONDARY K2 HV INTERLOCKS (CLOSED) RELAY HV TRANSFORMER F3 FUSE 20 AMP (BLOWN) LINE VOLTAGE CONTROL (L1) +24 VDC HV TRANSFORMER CONTROL...
SERVICE PARTS AND ILLUSTRATIONS FILAMENT AND HIGH VOLTAGE TERMINALS FIGURE 21: MICROWAVE SYSTEM PARTS Chapter 5: The Microwave System - Page 27 Microwave System Parts 24. 100186 Magnetron Wire 25. NGC-3015 Magnetron (ORG) COOLING 26. 102070 Magnetron Thermostat FINS (BLK) 27.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 24 & 25: HIGH VOLTAGE DIODE AND MAGNETRON Chapter 5: The Microwave System - Page 32 FILAMENT AND HIGH VOLTAGE TERMINALS ANTENNA FIGURE 26: OVEN DOOR REMOVAL AND PARTS Chapter 6: The Oven Door - Page 37 Cook Door Parts 38.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 29: PRIMARY AND SECONDARY INTERLOCKS ADJUSTMENT AND PARTS - OLD SWITCH SETUP Chapter 6: The Oven Door - Page 40 APPLY HI TEMP GREASE TO AREA Primary and Secondary Interlock Switch Parts 47. NGC-1076-2 Actuator, Door 48.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 31: MONITOR SWITCH ADJUSTMENT AND ASSEMBLY - OLD SWITCH SETUP Chapter 6: The Oven Door - Page 41 Monitor Safety Switch Parts 64. 102804 Hinge, Right 67. 101912 Standoff, #8-32F/Fx1 in S 65. 102012 Switch, Limit, Micro 68.
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SERVICE PARTS AND ILLUSTRATIONS FIGURES 33 AND 34: SECONDARY AND MONITOR SWITCH ADJUSTMENT AND ASSEMBLY - NEW SWITCH SETUP Chapter 6: The Oven Door - Page 43 81 82 Secondary and Monitor Safety Switch Parts 77. 102804 Hinge, Right 78. 102012 Switch, Limit, Micro (x2) 79.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 38: CONVECTION CIRCUIT ASSEMBLY AND PARTS Chapter 7: Convection Circuit - Page 48 Convection Circuit Parts 102. 101688 Screw, #8 x 1/2” PTH 112. NGC-3005 Relay, K4/K5 SSR 103. NGC-1081 Cover, Motor 113. 100592 Fuses, F1 and F2 (12 Amp) 104.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 39: IR ELEMENT AND CATALYTIC CONVERTER PARTS AND ASSEMBLY Chapter 8: IR Element and Catalytic Converter - Page 52 IR Element and Catalytic Converter Parts 116. 101312 Snap Ring 121. NGC-1030 Clip, Catalytic Converter 117. 102449 Washer, Shim (Non-SBK) 118.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 46: COVERS AND MISCELLANEOUS PARTS - NON-SBK OVENS x3 per panel 142 x2 134 x4 Covers and Miscellaneous Parts - Non-SBK 127. NGC-1069-1 Cover, Left Side NGC-1274 Rack, Recessed (International) 128. NGC-1069-2 Cover, Right Side NGC-3064 Rack, Raised 129.
SERVICE PARTS AND ILLUSTRATIONS FIGURE 47: COVERS AND MISCELLANEOUS PARTS - SBK OVENS x3 per panel 160 x2 152 x4 Covers and Miscellaneous Parts - SBK 145. NGC-1213-1 Cover, Left Side 156. NGC-3038 Stone, Clear Glazed 146. NGC-1213-2 Cover, Right Side 157.
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