TurboChef SOTA NGO User manual

TURBOCHEF TECHNOLOGIES, INC.
NGO Rev E Service Manual Changes
© 2009-2010 TurboChef Technologies, Inc.
May 2010
Upper jetplate part number now i1-3204
Added i1-9179 support rails to appendix
Added NGC-1194 switch offset shim (x2)
i1-9029 (SOTA) / i1-9023 (NGO)
SOTA letters: i1-9052 = S, i1-9053 = O,
i1-9054 = T, i1-9055 = A, i1-9056 = Caret
Left ctl: i1-9057 (SOTA) / i1-9453 (SBK)
Right ctl: i1-9058 (SOTA) / i1-9452 (SBK)
Door cover: i1-9109 (SOTA) / i1-9444 (SBK)
Shell: i1-9240 (SOTA) / i1-9445 (SBK)
Medallion: i1-9491 (SOTA) / i1-9489 (SBK)
LED light ring: i1-9198
Front panel: i1-9246 (SOTA) / i1-9458 (SBK)
Keypad: i1-9451-1 (SOTA) / i1-9451-2 (SBK)
i1-3201 = NGO SBK Door Kit
Added LED light ring to “controls” section
Specified “gray” smart card
Various appendix drawing updates
Add to safety instrutions: DO NOT cook with
metal lids or aluminum foil
Add to safety instrutions: DO NOT cook
without food in the cook cavity
Specified i1-3202 waveguide kit
Specified i1-3207 switch paddle kit
Removed blower component (hub, wheel, heat
slinger) part numbers, changed to REF
Appendix housekeeping
Updated door detail and part numbers
Removed blower assembly detail
Specified stirrer blade kit i1-3208
Changed coupling part number from 104134
to 104306
Updated stirrer motor detail
Changed motor controller part number from
100446 to CON-7039
Added international component part numbers
Added i1-3210 shunt plate kit
Added note about how to apply a new keypad
Added note to not apply push nut to trim
prong, to prevent interference with display
Added section: Troubleshooting: Menu settings
are not present
Moved “Write fail” troubleshooting to page 42
Updated schematic
Specified NGC-3033 for primary switch
replacement and modified drawing
Added notes for replacing primary switch
Specified stirrer shaft kit i1-3209
Added verbiage to cleaning instructions about
not forcing the rack out by pulling upward

TM
Service Manual
FOR THE TURBOCHEF NGO/SOTA TM RAPID COOK OVEN
©2009-2010 TurboChef Technologies, Inc.

For further information, call
800.90TURBO
or
+1 214.379.6000

The information contained in this manual is important for the proper installation, use, maintenance,
and repair of this oven. Follow these procedures and instructions to help ensure satisfactory baking
results and years of trouble-free service.
Errors – descriptive, typographic, or pictorial – are subject to correction. Specifications are subject to
change without notice.
Please carefully read this manual and retain it for future reference.

Safety Instructions
General Safety Information i
Reducing Fire Risk i
Grounding Instructions ii
Power Cord Replacement ii
Precautions to be Observed Before and During Servicing to Avoid
Possible Exposure to Excessive Microwave Energy ii
RF Interference Considerations ii
Specifications and Installation
Theory of Operation 1
Dimensions 1
Certifications 2
Oven Construction 2
Electrical Specifications 2
Installation 2
Unpacking Instructions 2
Installation Warnings - Read Before Lifting Oven 2
Lifting and Placing the Oven 3
Installation Near Open Heat Source 3
Oven Connect Suite 4
Oven Connect 4
ChefComm Pro 4
ChefComm Limited 4
Voltage Selection 4
Ventilation 4
Daily Maintenance5-6
Oven Controls and Cooking
Oven Controls 7
Cooking 8
Step 1: Turn the Oven On 8
Step 2: Select Cook Temperature 8
Step 3: Warming Up 8
Step 4: Soaking 9
Step 5: Ready to Cook 9
Step 6: Adjusting the Time 9
Step 7: Cooking 9
Step 8: Check/Remove Food from Oven 10
Step 9: Additional Cooking Options 10
Step 10: Cooling Down 10
Table of Contents

Info, Test, and Edit Mode
Overview of the Info Mode 11
Viewing Cook Counter/Time Logs 11
Viewing the Fault Log 11
Viewing the Service Numbers 11
Setting the Language 11
Resetting the Oven 11
Set Options Screen 12
Network Setup 12
Auto On and Off: Setting the Time 12
Test Mode - Testing Oven Parts 13
Status Indicators 13
Turning Diagnostic Mode On/Off 13
Manufacturing Mode 14
Microwave Leakage Test (How to Use Oven for Testing) 14
Microwave Power Test 14
Burn In14
Serial Number Edit 14
Self Test 14
Volt On15
Changing Temperature Measurement Setting 15
Erase/Default Oven Settings 15
Updating the Oven Menu 16
Making a Copy of the Oven Menu 16
Updating the Oven Firmware16
Overview of the Edit Mode 17
Menu Structure17
Changing Set Temperatures 17
Edit Recipe Settings 18
Changing Group/Item/Quantity Name 18
Changing Cook Settings 18
Oven Systems
Convection System 19
Blower Motor (Bottom) 19
Blower Motor (Top) 19
Blower Motor Speed Controller (BMSC) 19
Heater Elements 19
Jetplate (Bottom) 19
Jetplate (Top) 19
Stirrer Motor and Assembly 19
Troubleshooting 19
Oven Door 20
Removing/Reinstalling the Oven Door 20
Adjusting the Oven Door 20
Interlock Switches 21
Adjusting the Primary, Secondary, and Monitor Switches 21
Measuring RF Leakage for Microwave Safety 22
Troubleshooting 22

Microwave System 23
Capacitors 23
Testing a Capacitor 23
Filament Transformers 23
Wiring the Filament Transformers 23
High-Voltage Transformers 24
Wiring the High-Voltage Transformers 24
Testing a Filament or High-Voltage Transformer 24
High-Voltage Diodes 24
Testing a High-Voltage Diode 25
Magnetrons 26
Testing a Magnetron for an Open/Shorted Filament 26
Stirrer Motor and Assembly 26
Waveguides 26
Troubleshooting 26
Control System 27
Control Board27
Cooling Fans 27
Display 27
Electrical Compartment Cooling Fan Thermostat 27
Electrical Compartment Thermocouple 27
EMI Filter 27
Ethernet Extension Cable 28
Fuses 28
High-Limit Thermostat 28
Keypad 28
LED Light Ring (Sota only) 28
Magnetron Thermostats 28
Power Supply 28
Relay - K1 Filament 28
Relay - K2 Magnetron Cooling Fans 28
Relay - K3 Stirrer Motor 28
Relay - K6 Voltage 28
Relay - K7 Monitor 29
Relay - K8 Anode 29
RTD 29
Smart Card Reader 29
Solid State Relay - K4/K5 Heater 29
Speaker 29
Voltage Sensor 29
Wire Harness 29
Troubleshooting 29
Filtering System 30
Catalytic Converter 30
Air Filter 30
Vent Catalyst 30
Troubleshooting 30

Troubleshooting
Overview of Troubleshooting 31
Fault Code Descriptions 31
Fault Code Troubleshooting - F1 Blower Running Status Bad 33
Fault Code Troubleshooting - F2 Cook Temperature Low34
Fault Code Troubleshooting - F3 Magnetron Current Low35
Fault Code Troubleshooting - F4 Door Monitor Defective36
Fault Code Troubleshooting - F5 Magnetron Over Temperature36
Fault Code Troubleshooting - F6 Electrical Compartment Temperature High 37
Fault Code Troubleshooting - F7 RTD Open 37
Fault Code Troubleshooting - F8 Heat Low38
Fault Code Troubleshooting - F9 Cook Cavity Temperature High 38
Non-Fault Code Troubleshooting - No Keypad Input 39
Non-Fault Code Troubleshooting - “Cook Door Open” Message when Door is Closed 39
Non-Fault Code Troubleshooting - No Display (Screen is Blank) 40
Non-Fault Code Troubleshooting - Food Not Cooking Properly 41
Non-Fault Code Troubleshooting - “Read Fail” Message when Loading a Menu 42
Non-Fault Code Troubleshooting - “Write Fail” Message when Loading a Menu 42
Non-Fault Code Troubleshooting - Menu Settings are Not Present 43
Non-Fault Code Troubleshooting - “Defective Media” Message When Oven is
Plugged in or Restarted 44
Oven Schematic 45
Appendix - Replacing Oven Components
Replacing Oven Components A-1
Replacing Items - No Cover Removal Required A-2
Replacing Items - Removing Outer Shell Required A-4
Replacing Items - Removing Outer Shell and Back Cover Required A-11

i
IMPORTANT SAFETY INSTRUCTIONS
WARNING: When operating this oven, strictly adhere to the following safety precautions to reduce the risk of burns,
electric shock, fire, injury, damage to oven or property near oven, or possible exposure to excessive microwave energy.
General Safety Information
aRead all instructions before using this appliance.
aRead and follow the specific "Precautions to be Observed Before and During Servicing to Avoid Possible
Exposure to Excessive Microwave Energy" found on page ii.
aThis appliance must be grounded. Connect only to a properly grounded outlet. See "Grounding
Instructions" on page ii.
aInstall or locate this appliance only in accordance with the provided installation instructions.
aThis appliance should be serviced by qualified service personnel only. Contact the nearest authorized
service facility for examination, repair, or adjustment.
aKeep the cord away from heated surfaces.
aLiquids, such as water, coffee, or tea are able to be overheated beyond the boiling point without
appearing to be boiling. Visible bubbling or boiling when the container is removed from the microwave
oven is not always present. THIS COULD RESULTIN VERYHOTLIQUID SUDDENLYBOILING OVER WHEN THE
CONTAINER IS DISTURBED OR AUTENSIL IS INSERTED INTOTHE LIQUID.
aWARNING:The contents of feeding bottles and baby food jars must be stirred or shaken and the
temperature checked before consumption, in order to avoid burns (IEC 60335-2-90)
aUse this appliance only for its intended uses as described in this manual.
aOnly use utensils that are suitable for use in microwave ovens (IEC 60335-2-90)
XDO NOTuse corrosive chemicals or vapors in this appliance; it is not designed for industrial/laboratory use.
XWARNING: DO NOTheat liquids or other foods in sealed containers (e.g., jars, whole eggs, etc.) since
they are liable to explode.
XDO NOTcook with metal lids or aluminum foil
XDO NOTcook without food in the cook cavity.
XDO NOTallow children to use this appliance.
XDO NOToperate this appliance if it has a damaged cord or plug, is not working properly, or has been
damaged or dropped. See “Power Cord Replacement” found on page ii.
XDO NOTcover or block any openings on this appliance.
XDO NOTstore this appliance outdoors.
XDO NOTuse this product near water (e.g., near a kitchen sink, in a wet basement, near a swimming pool).
XDO NOTimmerse the cord or plug in water.
XDO NOTlet the cord hang over the edge of a table or counter.
XDO NOTuse a water jet for cleaning. See pages 5-6 in this manual for proper cleaning procedures.
XThis appliance is not to be used by children or persons with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction.
Reducing Fire Risk
aRemove wire twist-ties from paper or plastic bags used to facilitate cooking in the oven.
aIf materials inside the oven ignite, keep the oven door closed, turn the oven off, and disconnect the power
cord or shut off power at the fuse or circuit breaker panel.
aIf smoke is observed, switch off or unplug the oven. Keep the door closed to stifle any flames.
XDO NOTuse the cook cavity for storage purposes.
XDO NOTovercook food. Carefully attend to the oven if paper, plastic, or other combustible materials are
placed inside the oven to facilitate cooking.
XDO NOTleave paper products, cooking utensils, or food in the cavity when the oven is not in use.
SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS

Grounding Instructions
This appliance must be grounded. In the event of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric current. This oven is equipped with a cord that
has a grounding wire with a grounding plug, which must be plugged into an outlet that is properly
installed and grounded. Consult a qualified electrician or serviceman if uncertain about the ability to
follow grounding instructions or if doubt exists as to whether the appliance is properly grounded.
XDO NOTuse an extension cord. If the power cord is too short, have a qualified electrician or
serviceman install an outlet near the appliance.
WARNING: Improper grounding can result in risk of electric shock.
Power Cord Replacement
If the power cord is damaged, it must be replaced by the manufacturer, its service agent, or a similarly
qualified person.
Precautions to be Observed Before and During Servicing to Avoid Possible
Exposure to Excessive Microwave Energy
(a) DO NOToperate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing,
(3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges
and latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave
generating compartments, check the magnetron, wave guide or transmission line, and cavity for
proper alignment, integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave
generation and transmission systems shall be repaired, replaced, or adjusted by procedures described
in this manual before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
Refer to page 22 for leakage test procedures.
RF Interference Considerations
The NGO 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 requirements
of Council Directive 89/336/EEC on the approximation of the laws of the Member States relating to elec-
tromagnetic compatibility at the time of manufacture. However, some equipment with sensitivity to sig-
nals below these limits may experience interference.
If your equipment experiences interference:
aIncrease the physical separation between this oven and the sensitive equipment.
aIf the sensitive device can be grounded, do so following accepted grounding practices.
aIf battery-powered microphones are being affected, ensure that the batteries are fully charged.
aKeep sensitive equipment on separate electrical circuits if possible.
aRoute intercom wires, microphone wires, speaker cables, etc. away from the oven.
ii SAFETY INSTRUCTIONS

Specifications and Installation

SPECIFICATIONS AND INSTALLATION
1
Theory of Operation
Utilizing TurboChef’s patented technology to
rapidly cook food without compromising quality,
the NGO oven provides superior cooking
performance while requiring minimal space and
energy consumption. The control system precisely
coordinates independent top and bottom impinged
airflow with top-launched microwave to deliver
product-specific results, and integral catalytic
converters allow for UL®-certified ventless
operation (see page 4 for details).
This manual includes instructions for installing,
cleaning, operating, and servicing the NGO oven.
If you have questions that are not addressed in this
manual, contact Customer Support at
800.90TURBO (+1 214.379.6000) or your
Authorized Distributor.
Dimensions
Oven Dimensions
Height: 25.0” (635 mm)
Width: 16.0” (406 mm)
Depth (footprint): 18.5” (470 mm)
Depth (door closed): 29.8” (757 mm)
Depth (door open): 39.1” (993 mm)
Weight: 170 lb. (77 kg)
Cook Cavity Dimensions
Height: 7.2” (183 mm)
Width: 12.5” (318 mm)
Depth: 10.5” (267 mm)
Volume: 0.54 ft3(15.4 liters)
Clearances
Top: 5” (127 mm)
Sides: 2” (51 mm)
16.0”
(406 mm)
21.0”
(533 mm)
4.0”
(102 mm)
11.8”
(300 mm)
25.0”
(635 mm)
27.3”
(693 mm)
Approximate location
of cord and plug
2.5”
(64 mm)
18.5”
(470 mm) 4.2”
(107 mm)
10.7”
(272 mm)
25.9”
(658 mm)
2.5”
(64 mm)
39.1”
(993 mm)
Figure 1: NGO Oven Dimensions

Certifications
cULus, UL EPH, TÜV, CE, FDA
Oven Construction
Exterior
- Two-tone stainless steel front, top, and sides
- Ergonomic door handle
-4” (102 mm) adjustable legs
-Cool-to-the-touch door with microwave seal
Interior
-304 stainless steel interior
- Fully-insulated cook chamber
-Removable rack
- Top and bottom jetplates
Electrical Specifications
TurboChef recommends a Type D circuit breaker
for all installations outside the United States.
Single Phase (6200 watts)
US/Canada: 208/240 VAC*, 60 Hz, 30 A
Europe/Asia (UK): 230 VAC, 50 Hz, 27 A
Brazil (BK): 220 VAC, 60 Hz, 28 A
Latin America (LA): 220 VAC, 60 Hz, 28 A
Japan (JK): 200 VAC, 50 or 60 Hz, 30 A
Multiphase (6200 watts)
Europe/Asia Wye (EW): 400 VAC, 50 Hz, 16 A
Europe/Asia Delta (ED): 230 VAC, 50 Hz, 20 A
Japan Delta (JD): 200 VAC, 50 or 60 Hz, 20 A
Korea/Middle East Wye (KW): 400 VAC, 60 Hz,
16 A
Korea/Middle East Delta (SD): 230 VAC, 60 Hz,
20 A
Australia (AU): 400 VAC, 50 Hz, 16 A
* US/Canada models include a voltage sensor
that detects 208 or 240 VAC, but does not com-
pensate for lack-of or over-voltage installations.
Installation
Install or locate this appliance only in accordance
with the instructions below.
Unpacking Instructions
1. Remove the oven from its packaging.
2. Before discarding, check the packaging
thoroughly for accessories and literature.
NOTE: Packaging may also be retained in case the
oven may at some point be shipped somewhere
else or returned to the manufacturer.
3. Check the cook cavity thoroughly for
accessories and literature.
4. Discard any packaging in the cook cavity.
Installation Warnings - Read Before Lifting Oven
WARNING: The oven weighs approximately
170 lb. (77 kg). Never lift with fewer than
two people.
WARNING: Never lift the oven from the
front and rear or by the door handle. Doing so
will cause the door to misalign, resulting in a
non-warranty service call.
WARNING: The oven must be properly
placed on a food station at all times.
TurboChef will not recognize a fallen oven as
a warrantable claim and is not liable for any
injuries that may result.
WARNING: This oven is not intended for
built-in installation (i.e., installing the oven in
any structure that surrounds the oven by five
or more sides). Be sure to provide a minimum
of 2” (51 mm) clearance for all sides and 5”
(127 mm) clearance for the top.
WARNING: This oven is not intended to be
stacked without appropriate hardware.
Contact TurboChef for details.
2SPECIFICATIONS AND INSTALLATION

SPECIFICATIONS AND INSTALLATION
3
Lifting and Placing the Oven
1. Prepare a surface at least 26” (660 mm) deep
and capable of supporting 175 lb. (79 kg).
NOTE: Do not remove the oven legs, as clearance
is required for the bottom cooling fan.
2. Position one or more persons at the left and
right sides of the oven.
3. Place hands under the oven and lift.
4. Place the oven on the prepared surface,
ensuring no edges are hanging off the sides.
5. Ensure the oven rack is properly installed
(attached to the bottom jetplate).
6. Plug in the oven.
NOTE: The oven is primarily serviced through its
top. DO NOT install shelving directly over the
unit. The operator will be responsible for service
charges incurred as a result of added time required
to access the top of the oven.
Installation Near Open Heat Source
When placing a TurboChef oven near an open heat
source (Figure 2), strictly adhere to the following:
- If the oven is being placed near a grill or stove,
a divider must exist between the oven and the
open heat source, with a minimum of 6” (152
mm) between the oven and the divider.
-If the oven is being placed near a fryer, a
divider must exist between the oven and fryer,
with a minimum of 12” (305 mm) between
the oven and the divider.
-The height of the divider must be greater than
or equal to the height of the oven (25.0” or
635 mm).
-Verify the oven location has a minimum 5”
(127 mm) clearance on top and a minimum 2”
(51 mm) clearance on each side.
Grill
Partition
25.0” (635 mm)
Above Counter Top
TurboChef
NGO Oven
6”
(152 mm)
Minimum
12”
(305 mm)
Minimum
Deep Fryer
Counter Top / Table
Partition
25.0” (635 mm)
Above Counter Top
Figure 2: Installation Near Open Heat Source

4SPECIFICATIONS AND INSTALLATION
Oven Connect Suite
Oven Connect
Oven ConnectTM allows remote programming and
diagnostics checking from one centralized location
for multiple TurboChef ovens connected to a
network via ethernet (CAT5) cable. The simple
interface ensures maximum control over menu
settings, as well as diagnostic reporting straight
from field ovens.
If servicing a control board, follow the instructions
on page 27 to ensure proper connectivity.
ChefComm Pro
Part Number: CON-7006
ChefComm Pro® empowers any user of a
TurboChef oven to easily create menu settings on a
computer and transfer them to an oven via smart
card. For more information, call TurboChef
Customer Support at 800.90TURBO or
+1 214.379.6000.
ChefComm Limited
Part Number: CON-7016
ChefComm LimitedTM is a “read-and-transfer only”
version of ChefComm Pro that helps ensure
carefully-crafted settings are easy to distribute
globally, while providing the peace of mind that
they will not be altered.
Voltage Selection
For North America oven models, the oven will
detect 208 or 240 incoming voltage.
The initial voltage selection is typically completed
before the oven is used by the customer. However,
if incoming voltage for the store is different than
the preset voltage, the operator will be required to
select either 208 or 240 after pressing the On/Off
key to turn on the oven. The correct voltage will be
enlarged on the screen, identifying which option to
select (see Figure 3 below).
Ventilation
The TurboChef model NGO oven has been
approved by Underwriter’s Laboratory for ventless
operation (UL 710B, KNLZ listing) for all food
items except for foods classified as “fatty raw
proteins.” Such foods include bone-in, skin-on
chicken, raw hamburger meat, raw bacon, raw
sausage, steaks, etc. If cooking these types of foods,
consult local HVAC codes and authorities to ensure
compliance with ventilation requirements.
NOTE: In no event shall the manufacturer assume
any liability for damages or injuries resulting from
installations which are not in compliance with the
instructions and codes previously listed.
Figure 3: Selecting Voltage
208 VAC
SELECT VOLTAGE:
240 VAC

Daily Maintenance

DAILY MAINTENANCE
5
Step 1: Prepare the Oven
WARNING: The oven operates at approximately 525°F (274°C) and may
cause injury if not allowed to cool properly.
• Turn off the oven by pressing the On/Off key.
• Slightly open the oven door.
• Cooling takes approximately 30 minutes. DO NOTclean the oven until the
oven displays OVEN OFF: READY TO CLEAN.
Step 2: Remove the Wire Rack and Lower Jetplate
WARNING: Be sure the oven interior is cool before removing these items.
CAUTION: Do not force the rack out by pulling upward. Forcefully
dislodging the rack could cause the top ceramic jetplate to break.
• The wire rack and lower jetplate are connected and can be removed together.
• Push the wire rack towards the rear cavity wall (Fig A) and then lift up (Fig B).
• Maneuver the bottom jetplate out from under the tabs on the rear cavity wall.
CAUTION: DO NOT remove the top ceramic jetplate; breakage will result in
a non-warranty service call.
Step 3: Clean the Wire Rack and Lower Jetplate
• Detach the wire rack from the jetplate and wash, rinse, sanitize, and dry each part.
Step 4: Clean the Air Filter
CAUTION: TurboChef does not recognize blocked air vents as a warrantable
claim. The filter must be cleaned regularly or replaced if damaged. During oven
operation, the filter must remain in place at all times.
• Remove the air filter from the back of the oven.
• Rinse the air filter with hot water.
• Allow the air filter to dry completely.
CAUTION:DO NOToperate the oven without the air filter in place.
Step 5: Wipe the Oven Interior
• Use a food vacuum or damp towel to remove large particles from the oven cavity.
Continued on page 6.
Daily Maintenance
Follow the steps below when cleaning your NGO
oven. Use only TurboChef ®-approved cleaning
chemicals. The use of any other cleaning products
may damage critical oven components, resulting in a
non-warranty service call.
Supplies and Equipment
TurboChef ® Oven Cleaner (Product Number:
103180), TurboChef ® Oven Guard (Product Number:
103181, optional for easier maintenance), Kay Click-
San® sanitizer, nylon scrub pad, cleaning towel, dispos-
able gloves, protective eyewear, dust mask (optional)
Step 1
Step 2 (Fig A)
Step 2 (Fig B)
Step 4
Step 5