TurboChef HHB 2 Service Manual

TURBOCHEF T E C H N O LOGIES, I NC .

HHB2 Rev B Service Manual Changes

August 2010

Changed all “press and hold” key strokes to 2 seconds

Updated F7 troubleshooting

Updated “Cook Door Open When Door is Closed” troubleshooting

Updated “Food Not Cooking Properly” troubleshooting

Where applicable, updated drawings to match DOC-1267 parts catalog

Where applicable, updated part numbers and descriptions to match DOC-1267 parts catalog

Added hinge detail drawings

Added miscellaneous components drawing (covers, legs)

© 2010 TurboChef Technologies, Inc.

TM

Service Manual

    h  TM   

©2009–2010 TurboChef Technologies, Inc.

For further information call:

Customer Service at 800.90

Sales & Marketing at 866.90

TM

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 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.

Table of Contents

Safety Instructions

General Safety Information i
Reducing Fire Risk i
Preventing Oven Damage ii
Grounding Instructions ii
Power Cord Replacement ii

Specifications and Installation

Theory of Operation 1
Certifications 1
Dimensions 1
Construction 2
Exterior 2
Interior 2
Electrical Specifications 2
United States 2
Canada 2
Latin America 2
Europe/Asia/Pacific 2
United Kingdom/Ireland 2
Standard Features 3
Performance 3
Installation 3
Packaging 3
Damaged Shipment Claims 3
Lifting and Placing the Oven 3
Securing Oven to Cart 4
Double Stacking Ovens 4
Built-In Installation 4
Installation Near Open Heat Source 6
Setup 6
Ventilation Requirements 6
Optional Installation Items 7
Oven Restraint Kit 7
Oven Cart 7
Replacing/Exchanging Jetplates 8

Oven Maintenance

Daily Cleaning 9
Deep Cleaning 10

Operating the Oven

Control Display and Key Identification 13
Cooking Instructions 14
Additional Cooking Options 15
Time Screen 15
Done Screen 15
Options Menu 15
Enabling/Disabling the Edit Menu 16
Erasing the Recipe Menu 16
Enabling/Disabling the Write Card Function 17
Enabling/Disabling the Time Screen 17
Enabling/Disabling the Done Screen 18
Demonstration Mode 18
Programming Recipes 19
Adjusting the Cook Cavity Temperature 19
Modifying Recipes 19
Ordering a Smart Card 21
Loading Menu from Smart Card 21
Saving Menu to Smart Card 21
Checking Recipe Counter 21

Diagnosing an Issue

Fault Codes: Descriptions, Clearing Instructions, and Troubleshooting 23
F1: BLOWER (Blower Running Status Bad) 23
F2: LOW TEMP (Cook Temperature Low) 23
F6: EC TEMP (Electrical Compartment Temperature High) 24
F7: THERMO (Thermocouple Open) 24
F8: HEAT LOW 24
Status Indicators 25
Door 25
Heater A 25
Heater B 25
Blower 25
Testing Options 25
Diagnosing Door Switch Operation 26
Testing the Blower Motor 26
Viewing/Clearing the Fault Log 26
Adjusting the Temperature Offset 26
Checking Heaters A and B 26
Testing the Rack Oscillator Motor 26
Enabling/Disabling Diagnostic Mode 26
Viewing Cook Counter/Time 26
Viewing the Cumulative Operating Time 27
Viewing the Electrical Compartment Temperature 27
Setting Fahrenheit/Celsius 27
Viewing/Editing the Serial Number 27

Fault Code Troubleshooting 28
F1: BLOWER (Blower Running Status Bad) 28
F2: LOW TEMP (Cook Temperature Low) 29
F6: EC TEMP (Electrical Compartment Temperature High) 30
F7: THERMO (Thermocouple Open) 30
F8: HEAT LOW 31
Non-Fault Code Troubleshooting 32
No Keypad Input 32
“Cook Door Open” Message when Door is Closed 32
No Display – Screen is Blank 33
Food Not Cooking Properly 34
“Read Fail” Message When Loading Menu 35
“Write Fail” Message When Loading Menu 35

The Control System

Components 37
Control Board 37
Cooling Fans 37
Display 37
EMI Filter 37
Fuses 37
Keypad 37
Power Cord 37
Power Supply 37
Relay - Rack Oscillation Motor 37
Smart Card Reader 37
Solid State Relay (SSR) 38
Thermocouple – Cook Cavity 38
Thermocouple – Electrical Compartment (EC) 38
Thermostat – Cooling Fan 38
Thermostat – High-Limit 38
Voltage Sensor 38
Wire Harness 38

The Convection System

Components 41
Blower Motor 41
Blower Motor Speed Controller 41
Heaters 41
Jetplates 41
Jetplate Support Rails 41
Oven Rack 41
Rack Oscillation Motor 41
Swing Arm Assembly 41
Convection System Troubleshooting 41

The Oven Door

Components 45
Door Gasket 45
Door Handle 45
Door Hinges 45
Door Skin 45
Door Interlock Switch 45
Removing/Reinstalling the Oven Door 45

The Filtering System/Miscellaneous Components

Filtering System Components 47
Grease Filter 47
Grease Filter Frame 47
Catalytic Converter 47
Miscellaneous Components 48

Schematics

High h Batch 2 Schematic 49
Control Board and Test Point Locations 52

IMPORTANT SAFETY INSTRUCTIONS

WARNING: When operating this oven, strictly adhere to all safety precautions below, on page ii, and
throughout this manual to reduce the risk of burns, electric shock, fire, injury, oven damage, or property
damage. Improper installation, adjustment, alteration, service, or maintenance of this equipment can cause
property damage, injury, or death. Thoroughly read the installation, operating, and maintenance instructions
before installing or servicing this equipment.

General Safety Information

£

Use this appliance only for its intended uses as described in this manual.

£

Only qualified service personnel should service this appliance. Contact the nearest authorized service

facility for examination, repair, or adjustment.

£

Always ensure the oven is disconnected from the power supply before servicing, repairing, or adjusting

any components or parts.

£

This appliance must be grounded. Connect only to properly grounded outlet. See “Grounding

Instructions” found on page ii.

£

Install or locate this appliance only in accordance with the provided installation instructions.

T

DO NOT place the cord near heated surfaces.

T

DO NOT store or use flammable vapors or liquids (e.g., gasoline) in the vicinity of this appliance.

T

DO NOT allow children to use this appliance.

T

DO NOT place corrosive chemicals or vapors in this appliance. It is not designed for industrial or

laboratory use.

T

DO NOT operate this appliance if it

- Has a damaged cord or plug

- Is not working properly

- Has been damaged or dropped

T

DO NOT cover or block any openings on this appliance.

T

DO NOT store this appliance outdoors.

T

DO NOT use this appliance near water.

T

DO NOT immerse this appliance or any of its components (e.g., cord, plug, etc.) in water.

T

DO NOT let the cord hang over the edge of a table or counter.

T

This 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.

i

Reducing Fire Risk

If materials inside the oven ignite or if smoke is observed:

1. Keep the oven door closed.

2. Turn off the oven.

3. Disconnect the power cord or shut off power at the fuse/circuit breaker panel.

£

Carefully monitor the oven if paper, plastic, or other combustible materials are placed inside

to facilitate cooking.

T

DO NOT leave items in the cook cavity when the oven is not in use.

T

DO NOT cook items wrapped in cling wrap or plastic film.

T

DO NOT overcook food.

SAFETY INSTRUCTIONS

ii SAFETY INSTRUCTIONS

Preventing Oven Damage

£

Clean the oven daily (page 9). Failure to do so will adversely affect cooking performance and shorten

the life of the oven.

£

Once per month or more frequently depending on use, perform the deep cleaning procedure (pages

10-11). Failure to do so will adversely affect cooking performance and shorten the life of the oven.

£

Clean the oven only with TurboChef Oven Cleaner.

£

Operate the oven only when food is in the cook chamber.

T

DO NOT clean with a water jet.

T

DO NOT slam or mishandle the oven door.

T

DO NOT frequently open and close the door to check the cook status of the food.

T

DO NOT allow cleaning solution or water to remain in the cook chamber after cleaning or at

any other time.

£

When servicing this appliance, do not tear insulation to get to components. Rather, find the edge of

the insulation and remove the tape that holds it in place.

Grounding Instructions

WARNING: Improper grounding increases the risk of electric shock.

This appliance must be grounded. It is equipped with a cord that has a grounding wire and plug, which
in the event of an electrical short circuit reduces the risk of electric shock by providing an escape wire
for the electric current. The wire must be plugged into an outlet that is properly installed and grounded.
Consult a qualified electrician or serviceman for more information on grounding instructions or to
determine if the appliance is properly grounded.

T

DO NOT use an extension cord. If the power supply cord is too short, ask a qualified electrician or

serviceman to install an outlet near the appliance.

Power Cord Replacement

To avoid potential hazards, only the manufacturer, an authorized service agent, or a similarly-qualified
person should replace a damaged power cord.

Specifications and Installation

31.7 in. (805 mm)

29.2 in. (742 mm)

25.9 in. (658 mm)

21.4 in. (544 mm)

38.8 in. (986 mm)

17.4 in. (442 mm)

10 in.

(254 mm)

1

Theory of Operation

The TurboChef® High h Batch 2TM oven generates
high heat transfer rates to rapidly cook food by
recirculating impinged air at speeds of up to 60
mph. The technology includes utilizing a variable
speed blower, oscillating rack, and catalytic
converter, resulting in minimal energy input, high
food quality, and UL

®-certified ventless operation.

Certifications

UL, cUL, NSF, TÜV, CE

UL 710B (KNLZ) listed for ventless operation. See
page 6 for details and limitations.

Dimensions

Single Units
Height 17.4” (442 mm)
with legs* 21.4” (544 mm)
without legs 17.4” (442 mm)
Width 25.9” (658 mm)
Depth 29.2” (742 mm)
with handle 31.7” (805 mm)
Weight 157 lb. (71 kg)

Double Units (Requires a Stacking Kit)
Height
top w/ legs 42.8” (1087 mm)
top w/out legs 38.8” (986 mm)
Width 25.9” (658 mm)
Depth 29.2” (742 mm)
with handle 31.7” (805 mm)
Weight 314 lb. (142 kg)

* Legs are 4” (102 mm)

Cook Cavity
Height 8” (203 mm)
Width 18.75” (476 mm)
Depth 16.75” (425 mm)
Volume 1.45 cu. ft. (41.1 liters)

Figure 1: High h Batch 2 Dimensions

Wall Clearance
Top 2” (51 mm)
Sides 2” (51 mm)

SPECIFICATIONS AND INSTALLATION

2 SPECIFICATIONS AND INSTALLATION

Construction

Exterior

£

Stainless steel front, top, back, and powder-

coated sides

£

4” (102 mm) matte black legs

£

Ergonomic, cool to touch powder-coated door

handle

Interior

£

304 stainless steel interior

£

Water-tight construction

£

Interchangeable jetplates for customized

cooking results

Electrical Specifications

United States

£

HHB2 (P/N: HHB-8603-1)
Phase 1
Voltage* 208/240 VAC
Frequency 50/60 Hz
Current 24 amps
Max Circuit 30 amps
Max Input 5000 watts
Cord 10 gauge, 3 wire, 6 foot, SOOW
Plug NEMA 6-30P

Canada

£

HHB2C (P/N: HHB-8603-1C)
Phase 1
Voltage* 208/240 VAC
Frequency 50/60 Hz
Current 24 amps
Max Circuit 50 amps
Max Input 5000 watts
Cord 10 gauge, 3 wire, 6 foot, SOOW
Plug NEMA 6-50P

* Smart Voltage Sensor Technology automatically

senses the supply voltage and prompts the opera­tor to configure the oven to the correct setting
(208 or 240). However, it does not compensate
for lack-of or over-voltage situations.

Latin America

£

HHB2LA (P/N: HHB-8603-1K-2073)
Phase 1
Voltage 230 VAC
Frequency 50/60 Hz
Current 24 amps
Max Circuit 32 amps
Max Input 5000 watts
Cord 10 gauge, 3 wire, 5 foot, SOOW
Plug NEMA 6-30P

Europe/Asia/Pacific

£

HHB2EW (P/N: HHB-8603-1W)
Phase 3
Voltage 400 VAC
Frequency 50/60 Hz
Current 10 amps
Max Circuit 16 amps
Max Input 5000 watts
Cord HO7RN-F, 5 wire
Plug IEC 309, 5-pin, 16 amp

£

HHB2ED (P/N: HHB-8603-1D)
Phase 3
Voltage 230 VAC
Frequency 50/60 Hz
Current 14 amps
Max Circuit 20 amps
Max Input 5000 watts
Cord HO7RN-F, 4 wire
Plug IEC 309, 4-pin, 32 amp

United Kingdom/Ireland

£

HHB2UK (P/N: HHB-8603-1K)
Phase 1
Voltage 230 VAC
Frequency 50/60 Hz
Current 24 amps
Max Circuit 32 amps
Max Input 5000 watts
Cord HO7RN-F, 3 wire
Plug IEC 309, 3-pin, 32 amp

NOTE: The owner is responsible for supplying
voltage that meets the above specifications. For
more information, consult a qualified electrician.

3

Standard Features

Integral recirculating catalytic converter for UL

£

listed ventless operation (UL KNLZ)

Top and bottom jetplates removable for

£

cleaning

Variable-speed High h recirculating

£

impingement airflow system

Oscillating rack for high heat transfer without

£

spotting

Half-sheet pan/16-inch pizza capacity

£

Smart Voltage Sensor Technology* (U.S. only)

£

Stackable design (requires stacking kit)

£

Smart menu system capable of storing up to 72

£

recipes

Built-in self diagnostics for monitoring oven

£

components and performance

Includes plug and cord (5 ft.)

£

Warranty - 1 year parts and labor

£

Performance

£

Heat transfer rates (h) are 3X–4X typical

convection oven

£

Heat transfer rates (h) are 2X typical

conveyor oven

Installation

Install or locate this appliance only in accordance
with the instructions provided below and on pages
4-8. In no event shall the manufacturer assume
any liability for damages or injuries resulting from
installations which are not in compliance with these
instructions and the safety instructions listed on
pages i and ii.

Damaged Shipment Claims

Upon delivery, remove the oven from its packaging
and immediately note any damage. To file a claim,
contact the shipping company within 24 hours of
receiving the shipment. TurboChef is not respon­sible if a product is damaged during shipment.

Lifting and Placing the Oven

WARNING: Oven weight is approximately

157 lb. (71 kg). Two or more persons are
required to lift it.

WARNING: To prevent personal injury or

damage to the oven, DO NOT lift the oven
from the front and rear or by the handle.

WARNING: Ensure the oven is properly

placed on the table or countertop at all times.
TurboChef will not recognize a fallen oven as a
warrantable claim and is not liable for any
injuries that may result.

When lifting and placing the oven:

1. Position one or more persons on the left and

right sides of the oven.

2. Lift from the bottom of the oven.

3. Place the oven on surface at least 30” (762 mm)

deep and capable of supporting 167 lb. (76 kg).

SPECIFICATIONS AND INSTALLATION

Packaging

All ovens are packaged in a double-wall corrugated
box with integrated skids. If the oven may possibly
be shipped from its original place of installation
for any reason, TurboChef recommends retaining
the packaging in good condition.

4 SPECIFICATIONS AND INSTALLATION

1: Must be included by contractor

4.0" (102 mm)

300 CFM (8.5 CMM)

Discharge to Ambient

Fan

2.0" (51mm)

Unobstructed
Airflow

Unobstructed
Airflow

Notes:

2.0" (51mm)

2.0" (51mm)

2.0" (51mm)

1: Must be included by contractor

4.0" (102 mm)

300 CFM (8.5 CMM)

Discharge to Ambient

Fan

2.0" (51mm)

Unobstructed
Airflow

Unobstructed
Airflow

Notes:

Securing Oven to Cart

Reference Figure 3, adjacent.

1. Lock the oven cart wheels.

2. Place the oven on the cart.

WARNING: Do not attempt to lift the oven

with fewer than 2 people.

WARNING: When lifting the oven, position
at least one person on each side. Do not lift
the oven from the front and back, and do not
use the handle to lift the oven.

WARNING: Do not transport ovens on cart
when stacked.

4. Attach one oven cart bracket to each leg
(kit HHB-8206 includes four brackets).

5. Secure each leg by aligning the bracket with the
holes on the oven cart and attaching the parts
listed in Figure 3.

Double Stacking Ovens

1. Ensure the surface that will hold the stacked
ovens can support the weight (314 lb./142 kg).

2. Allow each oven time to cool and then unplug.

3. If stacking ovens on an oven cart, make sure
the bottom oven is bolted to the cart and the
wheels are locked (Figure 3).

4. Attach the stacking bracket to the back of the
bottom oven using the existing oven screws as
shown in Figure 4.

5. Remove the screws from the top oven, as
shown in Figure 4.

6. If desired, remove the legs from the top oven.

NOTE: Ovens can be stacked either with legs
attached or removed from the top oven.

7. Place the top oven on the bottom oven.

WARNING: Do not attempt to lift the oven

with fewer than two people.

WARNING: When lifting the oven, position
at least one person on each side. Do not lift
the oven from the front and back, and do not
use the handle to lift the oven.

8. Align the holes on the stacking bracket with the
holes on the top oven and reinstall the screws.

WARNING: Do not stack ovens more than

two-high.

Built-In Installation

TurboChef ovens are designed to be installed on
a countertop or table. They are not intended for
built-in or enclosed installation.

“Built-in or enclosed installation” is defined as
installing an oven in any structure that surrounds
the oven by five sides (top/rear/base/side panels).

If installation must be “built in,” the operator
must ensure the following (see Figure 2):

o

At least 300 cfm (8.5 cmm) of supplement flow
within the cabinet.

o

At least 2” (51 mm) clearance to every surface.

The operator will be responsible for compensating
any extra time required to service the product due
to removing the product for serviceability.

Figure 2: Built-in Installation

Bolt

Flat Washer

Bracket

Flat Washer

Split-Lock Washer

Nut

Figure 3: HhB 2 Oven Secured to TurboChef Oven Cart

5

Figure 4: Stacked HhB 2 Ovens (Two Configurations)

SPECIFICATIONS AND INSTALLATION

SPECIFICATIONS AND INSTALLATION

PA RTITION

21.4” (544 mm)
ABOVE COUNTER TOP

PA RTITION

21.4” (544 mm)
ABOVE COUNTER TOP

12”

(305 mm)

MINIMUM

6”

(152 mm)

MINIMUM

COUNTER TOP / TABLE

GRILL

TURBOCHEF

OVEN

DEEP FRYER

6

Figure 5: Installation Near Open Heat Source

Installation Near Open Heat Source

When placing a TurboChef oven near an open
heat source, strictly adhere to the following
(Figure 5):

£

Verify oven location has a minimum 6” (152

mm) clearance on top and minimum 2” (51
mm) of clearance on each side.

£

If the oven is being placed near a grill or stove,
there must be a divider 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, there
must be a divider 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 (21.4”/544
mm).

Setup

Once the oven is properly positioned on the
counter:

1. Remove packing material from the cook cavity.

2. Install the oven rack by placing it over the
support pins.

3. Plug the oven into a wall-mounted electrical
receptacle. (See Electrical Specifications, page 2.)

4. The oven has been preprogrammed with factory

settings and is ready to operate out of the box.

Ventilation Requirements

The TurboChef model HhB/HhB 2 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.

7

Optional Installation Items

Oven Restraint Kit (P/N: TC3-0242 KIT)

The oven restraint kit is an optional device that
prevents the oven from moving forward during use
and cleaning. It will not prevent the oven from fall­ing off a countertop if the oven is pulled off or the
legs are allowed to slide off the edge. Call
1-800-90TURBO or your Authorized Distributor
for more information.

Oven Cart

Construction

£

Available heights: 18” (457 mm) or

24” (610 mm)

£

304 stainless steel

£

14-gauge 304 stainless steel top

£

16-gauge 304 solid stainless steel shelf

£

Four 6” (152 mm) high polyurethane tired
casters, front two with safety locking brakes;
bolt-on to stainless steel leg

Standard Features

£

Reinforcement: Welded gusset plates between
legs and top to ensure rigidity/eliminate stand
racking

£

Frame: Fully welded 1.5” x 1.5” (38 mm x 38
mm) square stainless steel tube

£

Easy to assemble

Call 1-800-90TURBO or your Authorized
Distributor for more information.

18" (457 mm) Oven Cart Dimensions
Height 18" (457 mm)
with single oven 39.4" (1001 mm)
with stacked ovens*
top unit without legs 56.8" (1443 mm)
top unit with legs 60.8" (1544 mm)
Width 27.8" (706 mm)
with single oven 27.8" (706 mm)
with stacked ovens* 27.8" (706 mm)
Depth 26.625" (676 mm)
with single oven 31.7" (805 mm)
with stacked ovens* 31.7" (805 mm)

24" (610 mm) Oven Cart Dimensions
Height 24" (610 mm)
with single oven 45.4" (1153 mm)
with stacked ovens*
top unit without legs 62.8" (1595 mm)
top unit with legs 66.8" (1697 mm)
Width 27.8" (706 mm)
with single oven 27.8" (706 mm)
with stacked ovens* 27.8" (706 mm)
Depth 26.625" (676 mm)
with single oven 31.7" (805 mm)
with stacked ovens* 31.7" (805 mm)

*Requires Stacking Bracket.

Assembly instructions are included with the cart.
If additional help is needed, call 1-800-90TURBO
or your Authorized Distributor.

SPECIFICATIONS AND INSTALLATION

Figure 6: 24” (610 mm) Oven Cart with Oven(s)

NOTE: If using 18”
(457 mm) cart, subtract
6” (152 mm) from all
measurements.

8 SPECIFICATIONS AND INSTALLATION

Bottom Jetplate

Top Jetplate

Bottom Support Rail (Right)

Rack

Top Support Rail (x2)

Bottom Support Rail (Left)

Replacing/Exchanging Jetplates

Reference Figure 7. The top and bottom jetplates
ensure hot air is distributed evenly to maximize
food quality. For product-specific results, jetplates
with different hole patterns can be installed.

To remove the bottom jetplate:

1. Ensure the oven is off and the cook cavity

temperature is below 150°F (66°C).

2. Remove the oven rack.

3. Remove both lower support rails.

4. Remove the lower jetplate.

To remove the top jetplate:

1. Ensure the oven is off and the cook cavity

temperature is below 150°F (66°C).

2. Remove the oven rack.

3. Remove the filter bracket.

4. Remove both upper support rails.

5. If additional clearance is required, remove the
air diverter from the rear oven wall using a
Phillips screwdriver.

6. Remove the top jetplate.

Figure 7: Removing Jetplate

Oven Maintenance

The daily and deep cleaning procedures below will help maintain the High h Batch 2 oven. Be sure to use
only TurboChef Oven Cleaner; any other cleaner can damage and void the warranty on critical parts. To
order TurboChef Oven Cleaner, Oven Guard, or a new filter, call 1-800-90TURBO, [phone], or
your Authorized Distributor.

9

1

Supplies and Equipment: TurboChef Oven Cleaner (P/N: 103180), Oven Guard

(P/N: 103181), nylon scrub pad, cleaning towel, soft-bristle cleaning brush,
Phillips screwdriver (only if required for top jetplate removal)

Step 1: Prepare the Oven

£

2

Ensure the oven is turned off – press the On/Off key.

£

DO NOT attempt to clean the oven until the display reads “Ready to Clean.”

WARNING: Injury can occur if the oven is not allowed to cool properly
before cleaning.

Step 2: Remove the Oven Rack

3

£

Wash, rinse, sanitize, and dry the oven rack.

Step 3: Clean the Grease Filter

£

Grasp the filter latch and lift and pull out until the filter and bracket lie flat

(Figure 3).

£

Remove the filter from the bracket and gently rinse it.

4

CAUTION: DO NOT scrub the filter or use a water jet when cleaning.

£

If required, replace the filter (HHB-8287) if it has large holes or is becoming

detached from the frame.

5

6

Step 4: Clean the Oven Door and Cook Chamber

£

Using a damp towel, remove food particles.

£

For stubborn stains, spray Oven Cleaner and allow it to penetrate for 5 minutes.

£

Scrub with a nylon scrub pad.

£

Wipe the oven door and cook chamber with a clean damp towel.

£

Using a clean dry towel, thoroughly dry the cook chamber.

Step 5: Reinstall the Grease Filter and Oven Rack

Step 6: Apply Oven Guard

£

Follow instructions on bottle.

7

Step 7: Wipe the Oven Exterior with a Clean Damp Towel

OVEN MAINTENANCE

CAUTION: DO NOT spray chemicals into any openings, such as the

louvers on the side panels or the cooling fans on the back of the oven.
Doing so can damage critical oven components, resulting in a non-
warranty service call.

10 OVEN MAINTENANCE

4a

1

Deep Cleaning

TurboChef recommends deep-cleaning once per month, or more frequently
depending on oven use.

Step 1: Prepare the Oven

£

2

Ensure the oven is turned off – press the On/Off key.

£

DO NOT attempt to clean the oven until the display reads “Ready to

Clean.”

WARNING: Possible injury can occur if the oven is not allowed to
cool properly before cleaning.

3

Step 2: Remove the Oven Rack

£

Wash, rinse, sanitize, and dry the oven rack.

Step 3: Clean the Oven Door

£

Using a damp towel, remove food particles.

£

For stubborn stains, spray Oven Cleaner and allow it to penetrate for five

minutes.

£

Scrub with a nylon scrub pad.

£

Wipe the oven door with a clean damp towel.

4b

5a

5b

Step 4: Remove the Bottom Jetplate

£

Remove the left and right support rails by gently pulling the rail out,

then toward the middle of the oven (Figure 4a), and then out again.

£

Remove the bottom jetplate by gripping the thumb screw and lifting up

and out (Figure 4b).

£

Wash, rinse, sanitize, and dry the bottom jetplate and both support rails.

Step 5: Remove the Grease Filter and Bracket

£

Grasp the filter latch and lift and pull out until the filter and bracket lie

flat (Figure 5a).

£

Lift the right side of the filter bracket until you are able to remove it
(Figure 5b).

£

Remove the filter from the bracket and gently rinse it.

CAUTION: DO NOT scrub the filter or use a water jet when
cleaning.

£

Wash, rinse, sanitize, and dry the filter bracket.

£

Insert the filter back into the bracket. If required, replace the filter
(HHB-8287) if it has large holes or is becoming detached from the
frame.

Continued on page 11.

11

6a

6b

Step 6: Remove the Upper Jetplate

£

Remove both upper support rails by pulling the peg (Figure 6a).

£

Remove the upper jetplate. If additional clearance is required, remove the
air diverter using a Phillips screwdriver (Figure 6b).

£

Wash, rinse, sanitize, and dry the upper jetplate and support rails.

Step 7: Clean the Cook Chamber

CAUTION: DO NOT spray Oven Cleaner directly on the back
oven wall. Doing so may damage critical oven components,
resulting in a non-warranty service call.

£

Spray Oven Cleaner to break up stubborn stains and allow it to penetrate

7

for five minutes.

£

Scrub with a nylon scrub pad.

£

Clean the cook chamber thoroughly with a clean damp towel.

Step 8: Dry the Cook Chamber

£

Using a clean dry towel, thoroughly dry the cook chamber.

8

CAUTION: DO NOT operate the oven with water, cleaner, or
debris in the bottom of the cook chamber.

10

11

12

Step 9: Reinstall all Clean Parts

£

Reinstall in the following order:

9

1. Air diverter (if removed)

2. Upper jetplate

3. Upper support rails

4. Bottom jetplate

5. Lower support rails

6. Grease filter and bracket

7. Oven rack

Step 10: Apply Oven Guard

£

Follow instructions on the bottle.

Step 11: Clean the Cooling Fan Housing

£

Using a dry soft-bristle brush, clean the rear cooling fan housing.

Step 12: Wipe the Oven Exterior with a Clean Damp Towel

CAUTION: DO NOT spray chemicals into any openings, such as

OVEN MAINTENANCE

the louvers on the side panels or the cooling fan openings on the
back of the oven. Doing so can damage critical oven components,
resulting in a non-warranty service call.

12 OVEN MAINTENANCE

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left blank.

Operating the Oven

5 4

13

6

Figure 8: High h Batch 2 Keypad

This section contains information on:

£

Control display and key identification

£

Cooking instructions

£

Additional cooking options

£

Programming recipes

£

Using the Options menu

1

22

3

7

Control Display and Key Identification

Reference Figure 8.

1. Display

Displays operational information.

2. Soft keys (6)

Press to select an option on the screen that is
displayed adjacent to key.

3. Directional keys

Press to navigate menus and adjust
incremental settings, where applicable.

4. Enter key

Press to save edited information.

5. Back/Stop key

Press to stop a cook cycle or return to a
previous screen.

6. On/Off key

Press to turn the oven on and off.

7. Numeric Keypad

Modifies cook settings in Edit mode.

OPERATING THE OVEN

14 OPERATING THE OVEN

1ST GROUP

2ND GROUP

3RD GROUP

4TH GROUP

5TH GROUP

6TH GROUP

1ST ITEM

2ND ITEM

3RD ITEM

4TH ITEM

5TH ITEM

6TH ITEM

IST GROUP

Press the soft key that corresponds to the desired food
group. In this example, pressing the top left soft key
would access all food items in the “1st Group.”

Figure 9: Selecting a Food Group

Press the soft key corresponding to the desired food item.
In this example, pressing the top left soft key would initiate
a cook cycle for the “1st Item.”

Figure 10: Selecting a Food Item

Cooking Instructions

Each oven is pre-programmed with recipe settings
and is ready to operate out of the box. For instruc­tions on customizing these settings, see page 19.

To select a recipe and initiate a cook cycle:

1. Press the On/Off key to turn the oven on.
The oven will start warming up.

2. Once the oven reaches its predetermined cook
temperature (typically 500°F or 260°C), it will
beep and display “Ready to Cook.”

3. Carefully place the food item to be cooked in
the cook cavity.

WARNING: Inside of oven is HOT! Insert

food with caution.

4. To select a food group, press the corresponding
soft key (Figure 9).

NOTE: Press the Down key to view food groups
7-12.

NOTE: Press the Down key to view food

groups 7–12.

5. Select the item to cook by pressing the
corresponding soft key (Figure 10).

6. The oven will begin cooking, unless the

Time screen is enabled (see page 14).

NOTE: To immediately terminate a cook cycle,
press the Back/Stop key.

7. When cooking is complete, the oven will beep

and display “Please Remove Food from Oven.”

WARNING: Inside of oven is HOT!

Remove food with caution.

8. Remove the food. The oven will return to the

food group selection screen unless the Done
screen is enabled (see page 15).

15

ENTER COOK TIME

02:00

START

DONE

SAVE TIME

COOK MORE

Press the “Start” soft key (bottom right)
to initiate a cook cycle.

Figure 11: Time Screen

Press the “Save Time” soft key (bottom left)
to save an adjusted time.

Press the “Cook More” soft key
(bottom right) to cook an item longer.

Figure 12: Done Screen

Additional Cooking Options

Time Screen

Reference Figure 11. If the Time screen is enabled,
the operator will be given the option to adjust the
cook time in 5-second increments before initiating
a cook cycle.

Use the Up and Down keys to adjust time in
5-second increments.

After selecting “Cook More,” adjust additional
time in 5-second increments using the Up and
Down keys.

When an item is cooked longer, the oven cooks it
to the specifications of the final event in the initial
cook cycle. To learn about events of a recipe, see
Modifying Recipes (pages 19-22).

To learn about enabling and disabling the Done
screen, see page 18.

To learn about enabling and disabling the Time
screen, see page 17.

Done Screen

Reference Figure 12. If the Done screen is enabled,
the operator is given two choices upon opening the
oven door at the end of a cook cycle:

1. Save Time – save an adjusted cook time (only if
the Time screen is also enabled).

2. Cook More – cook an item longer after it reaches
the end of its cook cycle.

Options Menu

Use the Options menu to:

£

Enable/disable the Edit menu

£

Erase the Recipe Menu

£

Enable/disable the Write Card function

£

Enable/disable the Time screen

£

Enable/disable the Done screen

£

Enable/disable Demonstration mode

OPERATING THE OVEN

16 OPERATING THE OVEN

EDIT MENU ON

ERASE MENU

WRITE CARD OFF

TIME SCREEN ON

OVEN OPTIONS

DONE SCREEN ON

DEMONSTRATE OFF

EDIT MENU ON

ERASE MENU

ERASE MENU?

WRITE CARD OFF

TIME SCREEN ON

OVEN OPTIONS

DONE SCREEN ON

PRESS “ENTER”

DEMONSTRATE OFF

Step: 1

The Edit menu is turned on.

Figure 13: Enabling/Disabling the Edit Menu

Step: 1

Figure 14: Erasing the Menu

After “Erase Menu” is selected, a
confirmation message appears.

To access the options menu:

Step: 2

To access the Options menu,
press and hold either key for two seconds.

Step: 2

To access the Options menu,
press and hold either key for two seconds.

Erasing the Recipe Menu

Step: 3

1. Ensure the oven is cooling down or off.

2. Press and hold either the top left or top right
soft key for two seconds.

Enabling/Disabling the Edit Menu

Reference Figure 13. Enabling the Edit menu
allows operators to modify the cook cavity
temperature, group/item names, and recipe
settings. Disabling the Edit menu prevents
operators from accessing these options. By
default, the Edit menu is enabled.

To enable/disable the edit menu:

1. From the options menu, press the “Edit Menu”
soft key (top left) to turn the edit menu on/off.

2. Press the back/stop key to exit.

Reference Figure 14. Erasing the recipe menu will
permanently delete currently-stored recipes and
recipe settings, and is generally not recommended.

To erase the recipe menu:

1. From the options menu, press the “Erase Menu”
soft key (middle left).

2. Press the enter key to confirm or the back/stop
key to cancel.

3. Press the back/stop key to exit.

NOTE: Erasing the recipe menu is not required
when uploading new settings from a smart card
(page 21).

17

EDIT MENU ON

ERASE MENU

WRITE CARD OFF

TIME SCREEN ON

OVEN OPTIONS

DONE SCREEN ON

DEMONSTRATE OFF

EDIT MENU ON

ERASE MENU

WRITE CARD OFF

TIME SCREEN ON

OVEN OPTIONS

DONE SCREEN ON

DEMONSTRATE OFF

Step: 1

Figure 15: Enabling/Disabling the Write Card Function

To access the Options menu,
press and hold either key for two seconds.

Figure 16: Enabling/Disabling the Time Screen

The Write Card function
is turned off.

Here the Time screen function
is turned on.

To access the Options menu,
press and hold either key for two seconds.

Enabling/Disabling the Write Card Function

Step: 2

Step: 1

Step: 2

Enabling/Disabling the Time Screen

Reference Figure 15. Enabling the Write Card
function allows the operator to save recipes from
the oven to a smart card. Disabling the Write Card
function prevents operators from doing so.
By default, the Write Card function is disabled.

To enable/disable the Write Card function:

1. From the Options menu, press the “Write Card”
soft key (bottom left) to turn the Write Card
function on or off.

2. Press the Back/Stop key to exit.

Reference Figure 16. Enabling the Time screen
allows the operator to adjust the total cook time
before initiating a cook cycle. Disabling it helps
ensure originally-programmed cook times remain
unaltered.

To enable/disable the Time screen:

1. From the Options menu, press the “Time
Screen” soft key (top right) to turn the Time
screen function on or off.

2. Press the Back/Stop key to exit.

OPERATING THE OVEN

18 OPERATING THE OVEN

EDIT MENU ON

ERASE MENU

WRITE CARD OFF

TIME SCREEN ON

OVEN OPTIONS

DONE SCREEN ON

DEMONSTRATE OFF

Here the Done screen is turned on.

To access the Options menu,
press and hold either key for two seconds.

Figure 17: Enabling/Disabling the Done Screen

Step: 1

Enabling/Disabling Done Screen

Reference Figure 17. Enabling the Done screen
allows the operator to:

£

Save an adjusted cook time

£

Cook an item longer after it reaches the end

of its cook cycle

Disabling it helps ensure all originally-programmed
cook times remain unaltered. By default, the Done
screen is enabled.

Step: 2

To enable/disable the Done screen:

1. From the Options menu, press the “Done
Screen” soft key (middle right) to turn the Done
screen on or off.

2. Press the Back/Stop key to exit.

Demonstration Mode

When enabled, demonstration mode will prevent
the oven from heating. This mode should remain
off unless otherwise instructed by TurboChef.

19

SET TEMP 475°F

PRESS “ENTER”

Figure 18: Adjusting the Cook Cavity Temperature

Programming Recipes

Programming options include:

£

Adjusting the temperature set point

£

Modifying recipes

£

Loading a menu from a smart card

£

Saving a menu to a smart card

£

Checking the recipe counter

To access programming options, the oven must be
either cooling down or off.

Adjusting the Cook Cavity Temperature

Reference Figure 18.

1. Ensure the oven is either cooling down or off.

2. Verify the Edit menu is enabled (for
instructions, see page 16).

3. Press and hold the Up key for two seconds.

4. Adjust the cook cavity temperature in 25°F
(15ºC) increments using the Up and Down keys.

5. Press Enter to confirm the change and proceed
to editing individual recipes, or press the Back/
Stop key to cancel.

Modifying Recipes (Figures 19-21)

To modify a food item:

1. Ensure the oven is either cooling down or off.

2. Verify the Edit menu is enabled (for
instructions, see page 16).

3. Press and hold the Up key for two seconds.

4. Adjust the cook cavity temperature in 25°F
(15ºC) increments using the Up and Down keys.

5. Press Enter to confirm the change and proceed
to editing individual recipes.

Step: 3 & 4

Step: 5

6. Select the food group that contains the item to
be modified (Figure 19).

7. Select the food item to be modified (Figure 20).

8. From Food Item screen (Figure 21):

a. Press the Left or Right key to move
from one field to another. The selected field
will be bracketed.
b. Press the top-left and top-right soft keys to
move from one character to another.
c. Change the food group and item names using
the number keys or the Up and Down keys.

NOTE: Pressing the Up and Down keys will
clear the field of its current content unless you
first press either the top-left or top-right soft key.

d. Set the cook time by pressing the Up and

Down keys (5-second increments).



e. Turn rack oscillation on or off by pressing the

Up or Down key.

f. Enter cook time percentage per event (total

must equal 100%) using the number keys.
g. Enter % air per event using the number
keypad (rounds to nearest 5, with minimum
setting of 10%).

9. To test settings before saving, press the

bottom-left soft key. The oven will initiate a
cook cycle to the new specifications.

10. To save settings, press Enter. “Settings Saved”
will be displayed.

11. Press the Back/Stop key to exit the menu

(doing so before saving settings will discard
changes).

OPERATING THE OVEN

20 OPERATING THE OVEN

1ST ITEM

2ND ITEM

3RD ITEM

4TH ITEM

5TH ITEM

6TH ITEM

IST GROUP

1ST GROUP

2ND GROUP

3RD GROUP

4TH GROUP

5TH GROUP

6TH GROUP

EDIT GROUP

< 1ST GROUP >

EVENT 1 2 3 4
% TIME 100 0 0 0

1ST ITEM

COOK TIME 00:00

RACK ON

% AIR 100 100 100 100
TEST WARMING UP

Step: 6

In this example, pressing the top left soft key would
access all food items in the “1st Group”.

Figure 19: Modifying Recipes – Step 6

Step: 7

In this example, pressing the top left soft key will
allow the operator to modify the first food item in the
first food group.

Figure 20: Modifying Recipes – Step 7

NOTE: Press the Down key to view Food
Groups 7-12.

Step: 9

Step: 8b

Figure 21: Modifying Recipes – Steps 8-11

Step: 8c

Step: 8d

Step: 8c

Step: 8e

Step: 8f
Step: 8g

Step: 11

Step: 8a

Step: 10

21

LOADING . . .
FROM CARD

SAVING . . .
TO CARD

Ordering a Smart Card

To order a Smart Card, call 1-800-90TURBO,
[phone], or your Authorized Distributor.

Loading Menu from Smart Card

CAUTION: Loading a menu from a smart

card will overwrite all existing recipes
programmed into the oven.

To load a menu from a smart card:

1. Ensure the oven is either cooling down or off.

2. Insert the smart card into the smart card reader.
Orient the card as shown in Figure 22.

3. Press the bottom-left soft key.

4. Press the middle-left soft key to “Load Menu
from Card” (Figure 23).

5. Press Enter to confirm or Back/Stop to cancel.

After approximately 5 seconds, screen will display
that menu has loaded from card.

3. Insert the smart card into the smart card reader
Orient the card as shown in Figure 22.

4. Press the bottom-left soft key.

5. Press the top-left soft key to “Save Menu to
Card” (Figure 24).

6. Press Enter to confirm or Back/Stop to cancel.

Checking Recipe Counter

To view how many times each recipe (food item)
has been cooked:

1. Press and hold the middle-left or middle-right
soft key for two seconds.

2. The screen will display food items in the first
food group. To view other food groups, use the
Up and Down keys.

3. Press the Back/Stop to exit the menu.

NOTE: To erase counters, press Enter when
viewing the totals.

Saving Menu to Smart Card

CAUTION: Saving a menu to a smart
card will overwrite all existing recipes
programmed on the smart card.

To save a menu to a smart card:

1. Ensure the oven is either cooling down or off.

2. Verify the Write Card function is enabled (for
instructions, see page 17).

Step: 3

Step: 4

Figure 23: Loading from Smart Card

OPERATING THE OVEN

Figure 22: Inserting Smart Card into Reader

Step: 4

Step: 5

Figure 24: Saving to Smart Card

22 OPERATING THE OVEN

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Diagnosing an Issue

23

Fault Codes: Descriptions, Clearing
Instructions, and Troubleshooting

To help in troubleshooting, this section contains
information on

£

Fault codes: descriptions, clearing instructions,

and troubleshooting

£

Status indicators

£

Testing options

The High h Batch 2 oven continually monitors
and logs fault conditions. For instructions on
viewing the fault log, see page 26.

The fault log:

£

Logs each fault up to 255 instances before roll-

ing back to zero.

£

Increments when a fault is detected and retains

a count even if the fault message is cleared.

Reference Figure 25 (below) to determine when a
fault can occur.

F1: BLOWER (Blower Running Status Bad)

To clear this fault:

1. Turn the oven on. The blower motor may
restart successfully on its own.

2. Test the blower motor in Test Mode (page 26).

Troubleshooting this fault:

To troubleshoot an F1 Fault, see the diagram
on page 28.

F2: LOW TMP (Cook Temperature Low)

This fault will display if the cook chamber
temperature is more than 84°F (47ºC) below the
set temperature after 5 seconds into a cook cycle.

To clear this fault:

Try cooking again. If the cook chamber
temperature is within 84°F (47ºC) of the set
temperature, the fault will clear.

Troubleshooting: F2 Fault

To troubleshoot an F2 Fault, see the diagram
on page 29.

This fault will display when the blower motor
speed controller (BMSC) indicates no running
status. The oven responds to this fault by
terminating a cook cycle and/or reverting to the
Off state. The oven will automatically attempt to
restart every 2 seconds until the fault is cleared.

Fault Code and When Active Refer to

Description

Warm-up Ready to Cook Cool Down Off State

F1: Blower Running Status Bad* x x x x Page 28

F2: Cook Temperature Low* x x Page 29

F6: EC Temperature High x x x x Page 30

F7: Thermocouple Open x x x Page 30

F8: Heat Low x x Page 31
*Will terminate a Cook Cycle upon discovery.

DIAGNOSING AN ISSUE

Figure 25: Fault Code Description Table

24 DIAGNOSING AN ISSUE

High-limit
reset button

Figure 26: Location of High-Limit Thermostat Reset Button

F6: EC TEMP (Electrical Compartment
Temperature High)

This fault displays if the electrical compartment
(EC) temperature exceeds 158°F (70°C). The
control system checks the EC thermocouple
once per minute.

NOTE: This fault will not terminate a cook cycle.

To clear this fault:

The EC temperature must recede below
158°F (70°C).

Troubleshooting: F6 Fault

To troubleshoot an F6 Fault, see the diagram
on page 30.

F7: THERMO (Thermocouple Open)

This fault will display if the control system detects
that the cook chamber (CC) thermocouple is open
(reads 999°F/C).

To clear this fault:

The control system must detect continuity on
the thermocouple circuit.

Troubleshooting: F7 Fault

To troubleshoot an F7 Fault, see the diagram
on page 30.

F8: HEAT LOW

This fault will display if the cook chamber tempera­ture fails to rise at least 35°F (18ºC) over a five
minute period during warm-up.

NOTE: This fault will not log; rather, it will
display an error message during warm-up.

Troubleshooting: F8 Fault

To troubleshoot an F8 Fault, see the diagram
on page 31.

BLOWER

FAULTS

OFFSET

HEATER A

HEATER B

RACK OS

TEST HHB2STD 080409 CC 81°F

D H H A

Figure 27: Test Mode Screen 1 of 2

DIAG

COOKS

ACCUM

°ELEC

°F/°C

S/N

TEST HHB2STD 080409 CC 81°F

D H H A

Figure 28: Test Mode Screen 2 of 2

25

Status Indicators

To assist in troubleshooting, status indicators are
displayed in Test Mode and while the oven is
cooking in Diagnostic Mode. The following oven
parts are represented by letters at the bottom of the
display (Figure 27).

Door (D)

Backlit = OPEN
Not backlit = CLOSED

Heater A (left H)

Backlit = OFF
Not backlit = ON

Heater B (right H)

Backlit = OFF
Not Backlit = ON

Blower (A for “air”)

Backlit = OFF
Not Backlit = ON

Testing Options

To access Test Mode:

1. Ensure the oven is either off or cooling down.

2. Press and hold the Right key for two seconds.

NOTE: Use the Up and Down keys to toggle
between Test Mode screen 1 and 2.

From Test Mode screen 1 (Figure 27):

£

Diagnose door switch operation

£

Test the blower motor

£

Set the offset temperature

£

Test heaters A & B

£

Test the rack motor

From Test Mode screen 2 (Figure 28):

£

Set the oven to diagnostic mode

£

View cook counts/total cook time

£

View cumulative operating time

£

View the electrical compartment temperature

£

View/edit the serial number

£

View/clear the fault log

DIAGNOSING AN ISSUE

NOTE: In Figure 27, the door is closed, heaters A
and B are off, and the blower is on.

26 DIAGNOSING AN ISSUE

Diagnosing Door Switch Operation

From Test Mode screen 1, view status indicator D
as you monitor/adjust the door, hinges, or switch.

Testing the Blower Motor

1. From Test Mode screen 1 (Figure 27), press the
top-left soft key (BLOWER).

2. Continue pressing to raise blower speed in 10%
increments.

Viewing/Clearing the Fault Log

1. From Test Mode screen 1 (Figure 27), press
the middle-left soft key (FAULTS).

2. To zero the fault log, press the Enter.

Adjusting the Temperature Offset

The center of the cook cavity is not usually as hot
as the where the thermocouple takes readings. If
desired, the “temperature offset” feature allows the
displayed temperature to be adjusted for this dif­ference.

The value entered for temperature offset will
deduct from the oven’s temperature reading. For
example, if the oven temperature = 500ºF, an off­set of 20º will cause the oven to display 480ºF.

For the most accurate results, measure the tem­perature in the center of the cook cavity after the
oven has completed warmup and been idle for at
least 15 minutes.

To adjust the temperature offset:

1. From Test Mode screen 1 (Figure 27), press the
bottom-left soft key (OFFSET).

2. Continue pressing to adjust in 5°F increments.

3. Press Enter to confirm.

NOTE: Adjustments can be made only in
Fahrenheit (5ºF equals approximately 2.8ºC).

NOTE: After 20°F, the offset will roll back to 0°F.

Checking Heaters A and B

NOTE: The motor must be running to test the
heaters. If the blower speed is 0%, it will automati­cally increase to 10% at the initiation of this test.

To turn on heaters A and B (Figure 27):

1. From Test Mode screen 1, press the top-right
soft key (HEATER A) to turn heater A on/off.

2. Press the middle-right soft key (HEATER B) to
turn heater B on/off.

Testing the Rack Oscillator Motor

NOTE: The Oven Rack will not oscillate if it is
not properly set on the support pins.

To test the rack oscillator motor:

1. From Test Mode screen 1 (Figure 27), press the
bottom-right soft key (RACK OSC) to turn the
rack motor on/off.

Enabling/Disabling Diagnostic Mode

When Diagnostic Mode is enabled, the following
features will be available during a cook cycle:

£

Event settings (see page 19 for more details).

£

Status indicators (see page 25 for more details).

To enable/disable Diagnostic Mode:

1. From Test Mode screen 1, press the Down
Arrow key to view screen 2 (Figure 28).

2. Press the top-left soft key (DIAG) to turn
Diagnostic Mode on or off.

Viewing Cook Counter/Time

The oven logs how many cook cycles have com­pleted, as well as the cumulative cook time (shown
in minutes and seconds). To view cook counter/
time:

1. From Test Mode screen 2 (Figure 28), press the
middle-left soft key (COOKS) to view the total
number of cook cycles completed.

2. To view the cumulative cook time, press the
middle-left soft key (COOKS) again.

NOTE: To permanently erase the cook counter/
cumulative cook time, press the Enter key.

DIAG

COOKS

ACCUM

°ELEC

°F/°C

S/N

TEST HHB2STD 080409 CC 81°F

D H H A

< HHB2D59033 >

Figure 29: Serial Number Edit

27

Viewing the Cumulative Operating Time

The oven logs the total amount of time the oven
has been on (shown in hours and minutes),
including cooking and idle time.

From Test Mode screen 2 (Figure 28, page 25),
press the “ACCUM” Soft Key (bottom left) to
view cumulative operating time.

NOTE: To permanently erase the cumulative
operating time, press the Enter key.

Viewing the Electrical Compartment
Temperature

From Test Mode screen 2 (Figure 28, page 25),
press the top-right soft key (ºELEC) to view the
electrical compartment temperature.

Setting Fahrenheit/Celsius

From Test Mode screen 2 (Figure 28, page 25),
press the middle-right soft key (ºF/ºC) to change
the type of temperature measurement.

Viewing/Editing the Serial Number

1. From Test Mode screen 2 (Figure 28, page 25),
press the bottom-right soft key (S/N) to view
the serial number.

2. To edit the serial number (Figure 29), use the
number keys.

3. To move from character to character, use the

middle-left and middle-right soft keys.

NOTE: The cursor will also move to the next
character automatically if you wait two seconds.

4. Press the Enter key to save changes.

NOTE: If you do not press the Enter key, all
changes will be lost. You can also cancel editing
by pressing the Back/Stop key.

DIAGNOSING AN ISSUE

28 DIAGNOSING AN ISSUE

Fault Code Troubleshooting

Troubleshooting:

F1: BLOWER (Blower Running Status Bad)

Do resistance measurements
between windings and
chassis agree with values on
motor windings resistance
table (below)?

NO

Check the wire harness and
if necessary, replace blower
motor.

1. Test pin 1 of QC-11 connector for
control voltage.

2. Ground one lead and insert other into
pin 1 of the QC-11.

Is 0-10 VDC present throughout all speed
settings in Test Mode?

YES

YES

YES

Is the blower motor
spinning freely?

Is Status Indicator “A”
backlit in Test Mode?
(page 25)

NO

YES

YES

NO

Remove obstruction

NO

or if necessary, replace
blower motor.

1. Locate the QC-11
Connector (6-pin
connector located on the
top-right side of the
oven, see page 49 for
schematic).

2. Disconnect the QC-11
Connector.

3. Ground pin 5 of the QC­ 11 connector to the
chassis. Observe status
indicator on the display.

Does the “A” backlight
disappear when pin 5 is
grounded?

NO

Check the wire harness and
if necessary, replace BMSC.

TO FROM DESCRIPTION EXPECTED RESISTANCE

Black Red Winding (A-B) 2.0-2.6 Ohms

and if necessary, replace
the control board.

Black White Winding (A-C) 2.0-2.6 Ohms

Red White Winding (B-C) 2.0-2.6 Ohms

Black, Red or White Green Windings to Chassis Open

Figure 30: Motor Windings Resistance Table

Check the wire harness

Troubleshooting:

F2: LOW TMP (Cook Temperature Low)

29

Is wiring from the
door switch to the
control board OK?
(See page 49 for
schematic.)

YES

Adjust or replace
door switch if
necessary. (page 46)

If the problem
persists, replace the
control board.
(page 39)

YES

Does the display read “Cook Door
Open” when the door is closed?

NO

Reset and determine
why it tripped – excess
grease buildup, etc.
(Figure 26, page 24)

Correct wiring.

NO

YES

Is the high-limit
thermostat tripped?

NO

Is wiring from
SSR to the control
board OK?
(See page 49 for
schematic.)

YES

Replace the control
board. (page 39)

Is the SSR defective?

NO

NO

Correct wiring.

YES

Replace SSR.
(page 39)

NO

Is the heater element
defective?

YES

Ensure the jam nut is
adequately tightened
and the flange nut
(behind jam nut) is
not over-tightened. If
the problem persists,
replace the defective
heater. (page 43)

DIAGNOSING AN ISSUE

30 DIAGNOSING AN ISSUE

Troubleshooting:

F6: EC TEMP (Electrical Compartment Temperature High)

Does the oven have
room to ventilate?
(not tightly enclosed
by other appliances
or fixtures?)

YES

Are both cooling
fans rotating?

YES

Check for
obstructions in
the airflow and
remove them.

YES

NO

NO

Is the oven in an area of moderate
temperature (120ºF (49ºC) or cooler)?

Move oven to open area
or remove items that are
in close proximity.

Is the wire harness properly
connected? Check the cooling fan
thermostat, control board, and
cooling fans. (See page 49
for schematic.)

YES

Replace defective
component – either the cooling
fan thermostat (page 39),
control board (page 39),
or fan (page 40).

NO

Relocate oven to
cooler area.

NO

Correct wiring.

Is the CC thermocouple
defective?

Using an ohmmeter, mea­sure at the 40-pin connec­tor. The CC thermocouple
should not measure an
open reading (check for
open circuit).

Troubleshooting:

F7: THERMO (Thermocouple Open)

YES

YES

NO

Is the thermocouple properly
connected to the control board?
(See page 49 for schematic.)

Replace the defective thermocouple.
(page 39)

The catalyst may have “flashed” due to excessive
grease buildup in the cavity. Clean the oven (pages
10-11) and test operation.

NO

Correct connection.

Troubleshooting:

F8: HEAT LOW

31

Is the high-limit
thermostat tripped?

YES

Reset and determine
why it tripped – excess
grease buildup, etc.
(Figure 26, page 24)

YES

NO

Replace defective
heater. (page 43)

Verify the solid state
relay is not shorted
across output.

Is the blower motor moving air?

Is the heater element
defective?

YES

Replace the solid state
relay. (page 39)

NO

Is the solid state relay
defective?

YES

NO

Is wiring from the solid
state relay to the control
board OK? (See page 49 for
schematic.)

NO

See page 28
to troubleshoot
F1: BLOWER
(Blower Running
Status Bad)

YES

Replace the control
board. (page 39)

NO

Correct wiring.

DIAGNOSING AN ISSUE

32 DIAGNOSING AN ISSUE

Non-Fault Code Troubleshooting

This section provides troubleshooting tips for issues that may occur independent of an oven fault.

Troubleshooting:

No Keypad Input

YES

Replace the keypad.
(page 38)

Is the keypad cable properly connected
to the control board?

Troubleshooting:

“Cook Door Open” Message when Door is Closed

YES

Is the door aligned properly?

NO

NO

Correct wiring.

Is wiring from the door
switch to the control
board OK?

NO

Correct wiring.
If wiring is damaged,
replace the door
switch (page 46).

YES

Adjust the door switch
(page 45) or replace it.

Align the door by following
the steps for removing and
reinstalling it (page 45).

Troubleshooting:

No Display – Screen is Blank

33

Is wiring from the
control board to
display OK?

YES

Is J3 connector
receiving 5 VDC?
(page 52)

YES

Replace the display.
(page 32)

YES

NO

NO

Does the control beep when
a key is pressed?

Replace fuses.
(page 40)

Correct wiring.
If ribbon cable is
damaged, replace
with P/N 103024.

Replace power supply.
(page 39)

Replace the control
board. (page 39)

Check wiring from
Power Supply to the
control board. Correct
wiring if necessary.

NO

NO

NO

NO

Is the power supply
receiving power?

YES

Is the power supply
output at 24 VDC?

YES

Is the control board
receiving correct VDC?

Check voltage on D6
Diode on striped end
(page 52 for schematic
of the control board)

YES

Verify 5 VDC is
present on J3 con­nector. If not, replace
the control board
(page 39)

DIAGNOSING AN ISSUE

34 DIAGNOSING AN ISSUE

YES

Troubleshooting:

Food Not Cooking Properly

Does the problem occur for all
programmed recipes? For example, are all
recipes undercooked/overcooked/etc.?

NO

Are there any fault
codes present? See page

23.

Troubleshoot the
fault(s) using the steps
on pages 28-31.

NO

Is the menu part number
and revision correct? Verify
with customer or contact
TurboChef Customer Service.

NO

NO

Contact Customer
Service to obtain the
correct menu and load
it to the oven.

YES

YES

NO

Is the food item in the
correct starting state
(e.g., frozen, fresh, etc.)?

NO

Ensure the food item
is being properly
stored/prepared
before cooking.

Is the correct amount
of food (portion) being
cooked?

YES

YES

Is the menu part number

YES

and revision correct? Verify
with customer or contact
TurboChef Customer Service.

Have customer contact
their corporate HQ to
report cooking issues.
If menu was developed
by TurboChef, contact
Culinary department
or RSD.

Ensure that the cor­rect amount is being
cooked - not more or
less than the recipe
specifies.

Troubleshoot the
fault(s) using the steps
on pages 28-31.

Is the food item being prepared correctly
and consistently? For example, bread cuts
are straight and not “V” cuts, meat is
sliced at correct thickness, pizza dough is
correct consistency, etc.

NO

Are there any fault
codes present? See page

23.

YES

YES

NO

Ensure that the food
item is properly
prepared.

Troubleshooting:

“Read Fail” Message When Loading Menu

35

NO

Is the connection from
smart card reader to
control board OK?

YES

Replace the card reader
(page 38). If the
problem persists, replace
the control board (page

39).

Does a backup copy of
the menu work?

NO

Ensure the cable
connecting the reader
to the control board is
securely attached and
not damaged.

No backup copy

If the menu card was created by
TurboChef, obtain a new menu card
by contacting customer service at

800.90 or [phone].

NO

Is the connection from
smart card reader to
control board OK?

Troubleshooting:

“Write Fail” Message When Loading Menu

Try writing to a new
smart card. Was the
write successful?

NO

YES

Ensure the cable
connecting the reader
to the control board is
securely attached and
not damaged.

Replace the card reader
(page 38). If the
problem persists, replace
the control board (page

39).

DIAGNOSING AN ISSUE

36 DIAGNOSING AN ISSUE

This page intentionally

left blank.

The Control System

37

The control system signals, senses, commands, and
actuates all electrical components within then oven.
See page 49 for a schematic. See pages 38-40 for
illustrations regarding part locations and replace­ment.

Components

The control system consists of the following
components:

£

Control board

£

Cooling fans

£

Display

£

EMI filter

£

Fuses

£

Keypad

£

Power cord

£

Power supply

£

Relay - rack oscillation motor

£

Smart card reader

£

Solid state relay

£

Thermocouple – cook cavity

£

Thermocouple – electrical compartment

£

Thermostat – cooling fan

£

Thermostat – high-limit

£

Voltage sensor

£

Wire harness

Control Board

Figure 32. The control board uses 24 VDC from
the power supply to control each electrical compo­nent of the oven. Check for the 24 VDC on the
striped end of the D6 Diode. See page 52 for the
location of the D6 Diode on the control board.

EMI Filter

Figure 32. The EMI filter helps suppress the
amount of RF interference emitted by the oven.

Fuses

Figure 34. The F1 and F2 fuses are 12-amp,
ATMR, type D.

The F1 fuse (via brown wire) and F2 fuse (via blue
wire) are designed to blow in case of an over­current situation relative to these components:

- BMSC motor controller

- Electrical compartment cooling fans

- Power supply

- Stirrer motor

Keypad

Figure 31. The keypad is a 5 x 11 matrix membrane
switch. For details on key functions, see page 13.

Power Cord

The power cord is equipped with a grounding wire
and plug. See page 2 for different plug configura­tions, or page 49 for a schematic. To avoid poten­tial hazards, only the manufacturer, an authorized
service agent, or a similarly-qualified person should
replace a damaged power cord.

Power Supply

Figure 32. The power supply outputs 24 VDC at
40 watts to the control board.

Relay - Rack Oscillation Motor

Cooling Fans

Figure 32. The cooling fans (located in the rear of
the oven) are actuated by the cooling fan thermostat
when the temperature of the electrical compartment
reaches 120ºF (49ºC).

Display

Figure 31. The vacuum fluorescent display (VFD)
is the primary user interface. The display uses 5
VDC from the control board to operate.

Figure 32. The relay is 30 amp, double pole, dou­ble throw, 24 VDC, and actuates the rack oscillation
motor.

Smart Card Reader

Figure 31. The smart card reader allows the oven
operator to load menu updates from a smart card.
A menu that already exists in the oven can also be
saved to a smart card. For instructions, see page 15.

THE CONTROL SYSTEM

38 THE CONTROL SYSTEM

Solid State Relay (SSR)

Figure 32. The solid state relay is a 240 VAC, dual
40-amp relay. K4 (right) switches power to heater

1. K5 (left) switches power to heater 2. When the
SSR is actuated, the (-) control input will go to

0.00 VDC. When not actuated, the control input
will read -24.00 VDC.

Thermocouple – Cook Cavity

Figure 32. The cook cavity thermocouple is type K
and measures the temperature of the recirculating
impingement airflow. The thermocouple is “open”
(F7 Fault) if the display shows 999ºF/C.

Thermocouple – Electrical Compartment (EC)

Figure 32. The electrical compartment thermocouple
is type K and measures the temperature of the elec­trical compartment. If the temperature within the
electrical compartment is above 158ºF (70ºC), the
control will display an F6 Fault. It is located on the
40-pin connector.

Thermostat – Cooling Fan

Thermostat – High-Limit

Figure 34. The high limit thermostat is a three­pole, manual-reset thermostat with a trip point of
572ºF (300ºC). The thermostat interrupts power
to the main convection heater in the event of an
abnormal condition. Reset the high-limit thermo­stat by pressing the reset button (Figure 34).

Voltage Sensor

Figure 34. For North America oven models, the
oven will detect 208 or 240 incoming voltage.

Initial voltage selection is determined before the
oven is used by the customer. However, if incom­ing voltage for the store is different than the preset
voltage, the operator must 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.

Wire Harness

The wire harness distributes power to the oven’s
electrical components. (See schematic, page 49).

Figure 32. The cooling fan thermostat actuates the
rear cooling fans when the electrical compartment
temperature reaches 120ºF (49ºC).

3

Figure 31: Control System Components - Keypad and Display Housing

Ref # Part Description Part Number Hardware Description Hardware #

1 Cable, Smart-Card, 30 inch 100161 N/A N/A

Display with Ribbon Cable,

2

Brackets

3 Keypad, General Market HHB-8244 N/A N/A

HHB-3204

Screw, #4-40 x 1/4”, PPH, SS, Sems, Int Th
Nut, Keps Hex, #10-32, Cres, Ext Th

2

101520 (qty 4)
102963 (qty 2)

1 4

4 Smart Card Reader 100506 Screw, #6-32 x 1/4”, PPH, SS 101560 (qty 4)

39

14

11

12

6

8

15

10

9

Figure 32: Control System Components - Right Side

Ref # Part Description Part Number Hardware Description Hardware #

7

5

13

5 Clamp, Thermostat NGC-1152 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688

Control Board, Standard Kit
(USA and Intl)

6

Control Board, Dual Temp Kit
(USA and Intl)

7 EMI Filter 100539 Nut, Keps Hex, #6-32, Ext Tooth, Cres 102961 (qty 2)

8 Power Supply, 24VDC 101211 Screw, 6-32 x 3/8, PPH M/S, Sems, Lock Wshr 102911 (qty 3)

9 Relay, Two Pole 101273 Screw, 6-32 x 3/8, PPH M/S, Sems, Lock Wshr 102911 (qty 2)

Relay, Solid State, Dual

10

40-Amp, Kit

Software, Control, EPROM,
HHB (Domestic Oven)

11

Software, Control, EPROM,
HHB (Dual Temp)

12 Sound Device, Alternate NGC-3083 N/A N/A

Thermocouple (Cook Cavity),

13

Ungrounded, Assembly

Thermocouple, Electrical

14

Compartment

Thermostat (Cooling Fan), Snap

15

Disk, N.O. Close on Rise 120ºF

N/A Harness, HV, Fuses-Limit HHB-8308 N/A N/A

N/A Harness, HV, Fuses-SSR-Hx HHB-8310 N/A N/A

N/A Harness, Low V, Main HHB-8311 N/A N/A

N/A Harness, HV, Main HHB-8314 N/A N/A

N/A Harness, HV, Limit-Hx HHB-8315 N/A N/A

HHB-3213-X

HHB-3222-X

NGC-3005 Screw, 6-32 x 3/8, PPH M/S, Sems, Lock Wshr 102911 (qty 2)

HHB-8243-1

HHB-8243-2

HHB-8170 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 2)

700-1199 N/A N/A

102086 Screw, #6-32 x 1/2, PPH, Drill Point, Zinc 101687 (qty 2)

Screw, 6-32 x 3/8, PPH M/S, Sems, Lock Wshr
Standoff, #6-32 X 1/2

N/A N/A

102911 (qty 4)
101952 (qty 4)

THE CONTROL SYSTEM

40 THE CONTROL SYSTEM

NOTE: Fuse configurations
vary depending on oven
model. See the schematic
(page 49) for more details.

21

20

25

16

23

16

17

High-limit reset button

Figure 33: Control System Components - Back Panel

19

18

22

24

Figure 34: Control System Components - Lower Corner of Electrical Compartment

Ref # Part Description Part Number Hardware Description Hardware #

16 Baffle, Vent Tube NGC-1085 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688

17 Cooling Fan 100516 (qty 2) Screw, 10-32 x 1/2, PPHD, Type F, SS 101694 (qty 4 per)

18 Cover, Exhaust Fan HHB-8281 N/A (attached via tabs) N/A

19 Finger Guard, Fan 100087 (qty 2) See item 13 See item 13

20 Fuse Block, 2 Pole 103548 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 2)

21 Fuse, 12 Amp, ATMR, Type D 100592 (qty 2) N/A N/A

Harness, Wiring, Jumper

22

(Single Phase Ovens)

23 Power Cord See schematic (p. 49) N/A N/A

Thermostat, High-Limit, EGO

24

300ºC Manual Reset, 3 Pole

Voltage Sense Module (60 Hz

25

USA Only)

HHB-8312 N/A N/A

102075 Screw, M4 x 6, PPH SQ CO Sems, Zinc 101672 (qty 2)

100783 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688

The Convection System

41

The convection system is designed to rapidly heat,
clean, and recirculate air into the cook cavity. See
page 49 for a schematic. See pages 42-44 for illus­trations regarding part locations and replacement.

Components

The convection system consists of the following
components:

£

Blower motor

£

Blower motor speed controller

£

Heaters

£

Jetplates

£

Jetplate support rails

£

Oven rack

£

Rack oscillation motor

£

Swing arm assembly

Blower Motor

Figure 36. The convection motor is a brushless AC
switch reluctance type. Its top speed is 7100 RPM
at 1 HP. The motor is controlled by a proprietary
controller, spins counterclockwise, and can be
tested in Test Mode (page 26).

Blower Motor Speed Controller

Figure 36. The blower motor speed controller
(BMSC) is proprietary and will only operate the
convection motor described above. It is controlled
via 0-10 VDC speed command from the control
board. The BMSC can be tested in Test Mode by
testing the blower motors (see page 26).

Jetplates

Figure 35. The jetplates channel air from the
blower motor into the cook cavity. Different hole
patterns are available for custom cooking results;
contact TurboChef for more details.

Jetplate Support Rails

Figure 35. Each jetplate is supported by two rails.
These rails must be removed prior to replacing or
removing the jetplate for cleaning (see page 10 for
detailed cleaning instructions).

Oven Rack

Figure 35. The oven rack sits on two pins and
oscillates to help ensure even cooking. Rack oscilla­tion can be turned on or off on a per-item basis.

Rack Oscillation Motor

Figure 37. The rack oscillation motor actuates the
swing arm assembly, which causes the rack to oscil­late. The motor can be enabled on an item-by-item
basis, and can be tested in Test Mode (page 26).

Swing Arm Assembly

Figure 38. The swing arm assembly consists of two
arms connected by a link bar beneath the oven cav­ity. It is actuated by the rack oscillation motor.

Convection System Troubleshooting

The following faults may occur in relation to the
convection system:

Heaters

Figure 37. There are two convection sheathed-style
heaters, each rated at 3000 watts at 208 VAC with
a resistance of 14.4 ohms. The heaters are
controlled by the K4/K5 solid state relay. The heat­ers can be tested in Test Mode (see page 26).

- F1: Blower (see page 28)

- F2: Low Temp (see page 29)

- F6: EC Temp (see page 30)

- F7: Thermo (see page 30)

- F8: Heat Low (see page 31)

The following cooking performance issues may
occur in relation to the convection system:

- Food not cooking properly (see page 34)

THE CONVECTION SYSTEM

42 THE CONVECTION SYSTEM

NOTE: Oven door removed for illustration clarity;
not required for removing cavity components.

2

5

3

3

4

1

6

4

Figure 35: Convection System Components - Oven Cavity

7

8

9

Figure 36: Convection System Components - Back Panel

13

15

11

14

43

12

10

Figure 37: Convection System Components - Right Side

Ref # Part Description Part Number Hardware Description Hardware #

Jetplate, Bottom, Standard
Jetplate, Bottom, High Coverage

1

Jetplate, Bottom, Pizza
Jetplate, Bottom, Super Coverage

Jetplate, Top, Standard
Jetplate, Top, High Coverage

2

Jetplate, Top, Pizza
Jetplate, Top, Super Coverage

3 Rail Stud (x4), Kit HHB-3210 N/A N/A

Support Rails, Left and Right,

4

Bottom Kit

5 Support Rail, Top (qty 2) HHB-8117 N/A N/A

Oven Rack, Standard

6

Oven Rack, Double-Sided

7 Blower Motor HHB-8106 Nut, 1/4-20, Serrated Hex Flange, Zinc 100906 (qty 6)

8 Blower Motor Cover NGC-1081 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 8)

9 Blower Motor Speed Controller CON-7013 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 4)

10 Bell Crank, Motor Mount HHB-8296 N/A N/A

11 Cap, Silicone, Ultra-Bake (qty 4) 100795 N/A N/A

12 Cover, Swing Arm, with Mount HHB-8293 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 2)

13 Heater Kit HHB-3216

14 Rack Motor, Kit HHB-3231* Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 4)

15 Shield, Heater Insulation (qty 2) i5-9216 N/A N/A

* HHB-3231 kit includes item 13.

HHB-8013-1
HHB-8155-1
HHB-8156-1
HHB-8212-1

HHB-8013-2
HHB-8155-2
HHB-8156-2
HHB-8212-2

HHB-3214 N/A N/A

HHB-8104
HHB-8118

Screw, Thumb, 8-32 x 3/8, SS
Washer, Split Lock, #10

N/A N/A

N/A N/A

Screw, #8 x 3/8 Phil. Mod. Truss B 410 SS
Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS

101748
102350

101682 (qty 2)
101688 (qty 4)

THE CONVECTION SYSTEM

44 THE CONVECTION SYSTEM

17

18

16

16

Figure 38: Convection System Components - Swing Arms and Link Bar

Ref # Part Description Part Number Hardware Description Hardware #

Bushing, Swing Arm, 5/16

16

Flange Mount (qty 2)

17 Cover, Swing Arm, No Mount HHB-8297 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 2)

18 Swing Arms, Kit HHB-3227 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 4)

100152 N/A N/A

The Oven Door

45

Components

The oven door consists of the following
components:

£

Door Gasket

£

Door Handle

£

Door Hinges

£

Door Skin

£

Door Interlock Switch

Door Gasket

The door gasket ensures a proper seal when the
door is closed.

CAUTION: Do not scrub the gasket or
attempt to scrape beneath it. Doing so will
damage the gasket, resulting in a non-
warranty service call.

Door Handle

If damaged, the door handle can be replaced
without replacing the entire door.

Door Hinges

The door hinges are spring-loaded and unlike the
original HhB oven, the design will not allow for
door removal during cleaning.

Door Skin

If damaged, the door skin can be replaced
without replacing the entire door.

Door Interlock Switch

The interlock switch engages and disengages when
the door is opened/closed, alerting the control
system of the oven door state.

Removing/Reinstalling the Oven Door

To remove or reinstall the oven door, follow the
steps below.

1. Ensure the oven has cooled to 150°F (66°C).

2. Open the oven door to its full open position

and insert rivets, screws, or nails as shown in
Figure 40 to hold the hinges in the open
position.

3. Remove the four plastic plugs (two per side)

and the four 5/16 hex standoffs (two per side)
that attach the oven door to the hinges.

4. Carefully remove the oven door by pulling

the door away from the oven. It will slide off
the hinges.

5. To reinstall or fit a new door, carefully slide it

back onto the hinges and replace the four
5/16 hex standoffs (two per side).

6. Carefully remove the rivets, screws, or nails you

inserted in step 2.

7. Close the oven door.

8. Verify that the door is parallel to the oven frame.

If it is not parallel, complete the following:

- Incrementally, loosen the four 5/16 hex standoffs

until you can manually adjust the door.

- Gently push/pull the door towards/away

from the oven frame until the door and
oven frame are parallel.

- Tighten the four 5/16 hex standoffs and

replace the four plastic plugs.

9. From Test Mode (page 26), check the status

indicator D to verify the switch engages (door
closed) and disengages (door open) properly
and adjust if necessary (see steps in “Door
Interlock Switch” section, adjacent).

To adjust the door interlock switch, follow the
steps below.

1. Ensure the oven is at operating temperature.

2. Confirm the door closes properly.

3. Adjust the door interlock switch paddle arm to
close completely, but not touching the switch
itself.

4. Tighten the three adjustment screws.

THE OVEN DOOR

Figure 39: Insert Rivet/Screw/Nail to Keep Hinge Open

46 THE OVEN DOOR

3

4

1

2

5

7

Figure 40: Oven Door

Figure 41: Left Hinge Detail

Ref # Part Description Part Number Hardware Description Hardware #

6

Figure 42: Right Hinge Detail

8

10

9

1 Bracket, Hinge Support, Left HHB-8238 Screw, #8-32 x 3/8, Hex Washer Head 102953 (qty 3)

2 Bracket, Hinge Support, Right HHB-8239 Screw, #8-32 x 3/8, Hex Washer Head 102953 (qty 3)

3 Door, Complete Assembly HHB-3232

4 Door Handle HHB-8240 Bolt, #1/4-20 x 1.0, Hex, Serr, SS 102945 (qty 4)

5 Hinge, Left 102805

6 Hinge, Right 102804

7 Hole Plug, Door (qty 4) 101191 N/A N/A

8 Plate, Door Switch NGC-1126 Screw, #8-32 x 3/8, PPHD, Int Sems, SS 102921

Standoff, #8-32 x 3/8 x 1.0 Lg,

9

5/16/ F/F

10 Switch, Interlock 102012 Screw, #4-40 x 3/4, Sems, PPHD, SS 102904 (qty 2)

101914 Screw, #8-32 x 1/2, PPHD, Int Sems, SS 102923

Standoff, 5/16 Hex, 1.125L, 10-32 M/F
Hole Plug, Door, 1/2” Black

Screw, #8-32 x 3/8, PPHD, Int Sems, SS
Screw, #8-32 x 3/8, Hex Wshr Head
Bracket, Hinge Support, Left

Screw, #8-32 x 3/8, PPHD, Int Sems, SS
Screw, #8-32 x 3/8, Hex Wshr Head
Bracket, Hinge Support, Right

101924 (qty 4)
101191 (qty 4)

102809 (qty 4)
102953 (qty 3)
HHB-8238

102809 (qty 4)
102953 (qty 3)
HHB-8239

The Filtering System and
Miscellaneous Components

47

Filtering System Components

The filtering system consists of the following
components:

£

Grease filter

£

Grease filter frame

£

Catalytic converter

Grease Filter

The grease filter is located on the rear cavity wall
and helps remove grease and food particles from
the recirculating airflow. Checking the filter daily
is recommended to ensure optimal oven opera­tion. See page 9 for cleaning instructions.

Grease Filter Frame

The grease filter frame is designed to pivot for­ward for easy removal of the grease filter. See
page 9 for removal and cleaning instructions.

Catalytic Converter

The catalytic converter, a VOC type catalyst, is
located behind the rear cook cavity wall and is
responsible for cleaning the recirculating airflow.
The catalyst functions by substantially lowering
the combustion temperature of grease entrained
in the air path to approximately the same tem­perature of the airflow, thus the grease burns
and breaks down into CO

and H2O as it passes

2

through the catalytic converter. The catalyst will
operate most efficiently at temperatures above
475ºF (246ºC).

The catalytic converter is self-cleaning. It is not a
component that requires scheduled maintenance.
Additionally, the catalyst material is very sensi­tive to certain chemical compounds. Irreversible
dam-age can occur if the catalyst is exposed to
cleaning chemicals containing phosphates, NaOH,
silicates, Na and Potassium Salts; therefore, use
only Turbo-Chef

Oven Cleaner when cleaning the

oven.

1

2

3

Figure 43: Filtering System Components

Ref # Part Description Part Number Hardware Description Hardware #

1 Filter, Grease HHB-8287 N/A N/A

2 Filter, Bracket HHB-8288 N/A N/A

3 Catalytic Converter HHB-8108 N/A N/A

THE FILTERING SYSTEM

48 MISCELLANEOUS COMPONENTS

1

3

2

4

5

Figure 44: Miscellaneous Components

Ref # Part Description Part Number Hardware Description Hardware #

1 Cover, Left Side HHB-8271 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 3)

2 Cover, Right Side HHB-8272 Screw, #8 x 1/2 PTRH, Type 17, Serr, 410 SS 101688 (qty 3)

3 Cover, Top/Controls HHB-8254 Screw, #10-32 x .38 Lg, 100 Deg, PFLHD, SS 101401 (qty 3)

4 Leg, with Pad (qty 4) HHB-3205 N/A N/A

5 Pad, Abrasive (qty 4) NGC-1440 N/A N/A

Schematics

HHB-3204

VFD DISPLAY

NGC-3005

SOLID STATE

RELAY

+ - + -

1 2 3 4

EXHAUST

INTAKE

FAN 1 (COOLING)

FAN 2 (COOLING)

100516

100516

SPD CMD 0-10V

I/O COM

ENABLE

I/O COM

STATUS OK

I/O COM

BLOWER MOTOR
SPEED CONTROL

CON-7013

HHB-8106

GREEN

WHITE

RED
BLACK

1 2 3 4

1 2 3 4

RD-16

BK-20

OSCILLATING RACK
RELAY, K1

101273

POWER
SUPPLY

101211

24VDC

OSCILLATING RACK
MOTOR

HHB-8292

EMI FILTER

100539

INPUT

OUTPUT

OT 2
EC FAN T-STAT
120°F

102086

A1

A2

B1

B2

K5 K4

A

B

321 4 5 6 7 8

HX ELEMENT (2)
2500 WATTS @ 208V

17.30 OHM

HHB-3216

OT 1
HI-LIMIT
MANUAL RESET

102075

WH-28

RD-19

WH-301

VOLTAGE
MODULE

100783

9 10

JUMPER

1 3

2 4

L2

7

8

9

56L1

10

3 WIRE INPUT

SINGLE

PHASE

BRN

BLK

GRN

L1

L2

USA = NEMA 6-30 (100187)
CANADA = NEMA 6-50 (I5-9127)
EU = 3 PIN, 32A (HHB-8195-1)

1 3

2 4

L2

7

8

56L1

FUSE: F1 + F2
12A CLASS CC
100592

L1

L2

L3

4 WIRE INPUT

DELTA

3 PHASE

L3

EU = 4 PIN, 32A
(HHB-8195-2)

5 WIRE INPUT

WYE

3 PHASE

L1

L2

L3

N

1 3

2 4

L2

7

8

56L1

N

L3

EU = 5 PIN, 16A
(HHB-8195-3)

SMART
CARD
READER

100506

KEYPAD

HHB-8244

TURBOCHEF TECHNICAL SUPPORT

800.908.8726 (USA)

+214.379.6000 (international)

TM

FUSE: F3 + F4
12A CLASS CC
100592

FUSE: F2 + F4
12A CLASS CC
100592

WH-27

RD-19

WH-27

WH-28

OR-9

OR-13

RD-16

RD-19

BK-20

BK-22

RD-24
BK-25

WH-31

BK-33

WH-301

OR-6

1. SCHEMATIC SHOWS OVEN WITH DOOR
OPEN AND WITHOUT POWER .

2. COMPONENT PART NUMBERS ARE
INCLUDED FOR QUICK REFERENCE.

BK-BLACK = 24VDC COMMON
OR - ORANGE = STATUS INPUT
WH - WHITE = CONTROL OUTPUT
RD - RED = +24VDC

COLOR CODE (LOW/CONTROL VOLTAGE)

COLOR CODE (LINE VOLTAGE)
BL - BLUE = (208-240 OR N)

BR - BROWN = LINE V (208-240)
BK - HI-TEMP 208-240 VAC WIRE

NOTES:

OR-13

BK-33

1

23

456

QC-11 CONNECTIONS

1 = 0-10V CONTROL (RD-24)
2 = I/O COMMON ( BK-25)
3 = ENABLE (WH-31)
4 = VOLTAGE MODULE (BK-33)
5 = STATUS OK (OR-9)
6 = VOLTAGE MODULE (OR-13)

QC-11

1 2 3 4 5 6

1 2 3 4 5 6

RD-24

BK-25

WH-31

OR-9

102012

DOOR SWITCH

BK-22

OR-6

RELAY + 24V

BR

BL

BR

BL

BL

BR

BR

BR

BR

BR

BL

BL

BL

BL

BL

BR

BR

BR

BL

BL

BL

BR

INTERLOCK (NO) IN

BMSC (STATUS OK)

HX STATUS IN

VOLT MODULE IN

+24V PS IN

-24V PS IN

-24V INTERLOCK RTN

BMSC 0-10V OUT

BMSC COMMON

RACK (K1) (OUT)

HEATER B (K5) (OUT)

HEATER A (K4) (OUT)

BMSC ENABLE OUT

-24V (VOLT MODULE RETURN)

EC

THERMOCOUPLES

CC

RJ11

RJ11

P3

J3

ECN 0907032 J. POOL
RELEASE FOR PRODUCTION

7/21/09

49

Figure 44: High h Batch 2 Schematic

SCHEMATICS

50 SCHEM

TICS

A

This page intentionally

t blank.

lef

51

HhB 2 Oven Schematic

Figure 45, page 49.

NOTE: Schematic shows the oven with door open
and without power applied.

Color Code (Line Voltage)

BL – Blue = Line V (208/240)
BR – Brown = Line V (208/240)

Color Code (Low/Control Voltage)

BK – Black = 24 VDC Common
OR – Orange = Status Input
WH – White = Control Input
RD – Red = +24 VDC

Line Voltage Components

Blower Motor
Blower Motor Controller
Cooling Fans
Fuses
Heater Element
Power Supply, +24VDC
Rack Oscillator Motor
Relay
Solid State Relay
Thermostat – Cooling Fan
Thermostat – Hi-Limit
Voltage Sensor Module
Wiring Harness – Line Voltage

Low Voltage Components

Cable – Smart Card Connector
Display, VFD
Door Switch
I/O Control Board
Keypad
Ribbon Connector – Display
Smart Card Reader
Thermocouple – CC
Thermocouple – EC
Wiring Harness – Low Voltage

I/O Control Board Component Identification
and Test Point Locations

Figure 46, page 52

J2 40-Pin Connector for LV Harness
J3 3-Pin Connector for VFD Display
J4 14-Pin Connector for Keypad
J5 26-Pin Connector for Display Data
RJ11 Connector for Smart Card Cable
U15 EPROM Socket
P1 Voltage Reference 0-5 VDC
P3 Blower Controller Pin Configuration
SKP1 Beeper
R51 Beeper Volume Adjustment

SCHEMATICS

52 SCHEMATICS

RJ11

RJ11

J2

J6

BR1

J4

+

U15

R51

D6

P1

P3

J3

SKP1

Figure 46: I/O Control Board and Test Point Locations

For further information call:

Customer Service at 800.90

Sales and Marketing at 866.90

Part Number: HHB-8722 / Revision B / August 2010
© 2009–2010 TurboChef Technologies, Inc.

Global Operations

TM

4240 International Pkwy, Suite 105
Carrollton, Texas 75007

214.379.6000 

214.379.6073 

Customer Service

800.90

turbochef.com