Hobart Food Machines HFB6 Installation Manual

MODEL HFB6

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ELECTRIC OVEN

MODEL

HFB6 ML-126878

ML-126880

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 34485 (May 2000)

TABLE OF CONTENTS

GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installation Codes and Standards . . . . . . . . . . . . . . . . . . . . . . . . . 4

Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Exhaust Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Electrical Connection (Hard Wired Ovens). . . . . . . . . . . . . . . . . . 5

Electrical Connection (Cord Connected Ovens). . . . . . . . . . . . . . 5

Start-up Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Lamp Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Voltage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Utensils to Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Cooking Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Controls — Model HFB6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

To Start Cooking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Choosing a Power Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Choosing a Cook Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

To Save a Recipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Password Protection for Presets. . . . . . . . . . . . . . . . . . . . . . . . . 10

Stopping or Pausing a Recipe . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Approved Cleaning Materials and Procedures. . . . . . . . . . . . . . 11

Cleaners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Cleaning Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Removing and Installing the Top Lamp Shield . . . . . . . . . . . . . . 13

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Inspecting the Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Circuit Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Lamp Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

HOBART CORPORATION, 2000



– 2 –

Installation, Operation, and Care of

MODEL HFB6

ELECTRIC

SAVE THESE INSTRUCTIONS

OVEN

GENERAL

Your Hobart
cooking technology. The baking process is so fast that food retains its natural juices. Bread products
brown and become crisp while vegetables retain their color and texture.

Flash

Bake ovens use visible and infrared light energy to cook by radiative heat transfer. The infrared
energy browns the surface of the food, while the visible light energy penetrates and heats it internally.
Using the proper combination of visible and infrared light energy, the
efficient, high-speed baking and high quality food.

The HFB6
installation, or with a junction box for direct line connection.

Flash

Bake oven is a versatile oven that employs a revolutionary high quality, high-speed

Flash

Bake oven provides

Flash

Bake oven may be ordered with a 6 foot (1829 mm) power cord for receptacle

INSTALLATION

Before installing, verify that the electrical service agrees with the specifications on the rating plate
located on the rear of the oven. If the supply and specifications do not agree, do not proceed with the
installation. Contact your dealer or your local Hobart-authorized service office immediately.

UNPACKING

Immediately after unpacking, check for possible shipping damage. If the oven is found to be damaged,
save the packaging material and contact the carrier within 15 days of delivery.

Check to make sure you have the following items:

1. Oven (1) 5. Cooking guide (1)

2. 16" (406.5 mm) stainless steel grill (1) 6. Lamp shield scraper (1)

3. Upper lamp shield (1) 7. Menu cards (3)

4. Instructions Manual (1)

LOCATION

When deciding oven placement, be sure to consider clearance and available air for oven cooling. If the
inlet air is obstructed or heated, the oven will not operate properly.

Install the oven on a level countertop.
There must be a 3" (76 mm) minimum clearance on each side of the oven. The area behind the oven

around the blower must be kept clear of obstructions and allow free air circulation.
Make sure the cord can be plugged into the appropriate outlet.

– 3 –

Fan

Flexible Duct
(By Others)

OVEN REAR

Power Cord

Duct Clamp
(By Others)

Blower

PL-53483

INSTALLATION CODES AND STANDARDS

Flash

The HFB6

Bake oven must be installed in accordance with:

In the United States of America:

1. State and local codes.

2. National Electrical Code, ANSI/NFPA-70 (latest edition). Copies may be obtained from The
National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

In Canada:

1. Local codes.

2. Canadian Electrical Code, Part 2, CSA Standard C22.1 (latest edition). Copies may be obtained
from The Canadian Standard Association, 178 Rexdale Blvd., Rexdale, Ontario, Canada
M9W 1R3.

ASSEMBLY

Install the upper lamp shield into the oven cavity. Be sure the shield is pushed all the way back and
is lying flat in the channels. Refer to REMOVING AND INSTALLING THE TOP LAMP SHIELD, page

13.
Place the grill on the rollers.

EXHAUST DUCT INSTALLATION

A length of flexible exhaust duct may be attached to the oven to vent hot air out of the area. Attach
the duct to the blower assembly (Fig. 1).

The other end of the duct can be vented into an existing hood, or to the outside in a manner consistent
with local building codes.

The exhaust duct must not be less
than 4" (

10.1 cm) diameter, and a

recommended maximum length of 6

182.9 cm). The duct should be

feet (
made of metal, suitable for high
temperature use. Be sure there are
no bends in the duct that will restrict
air flow.

A duct longer than 6 feet (
may require a supplementary

182.9 cm)

exhaust system to ensure adequate
air flow. The exhaust system must
support 135 cfm.

Fig. 1

– 4 –

ELECTRICAL CONNECTION — (Hard Wired Ovens)
WARNING: ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE

APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER LOCAL
ELECTRICAL CODES.

WARNING: DISCONNECT THE ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE
DISCONNECT SWITCH TO INDICATE YOU ARE WORKING ON THE CIRCUIT.

A qualified electrician must wire the oven into a properly-rated dedicated circuit.
Measure the incoming power supply with a volt ohmmeter. The supply MUST measure 197 volts with

no load as a minimum.

ELECTRICAL CONNECTION — (Cord Connected Ovens)
WARNING: APPLIANCES EQUIPPED WITH A FLEXIBLE ELECTRIC SUPPLY CORD ARE PROVIDED

WITH A THREE-PRONG GROUNDING PLUG. THE PLUG MUST BE CONNECTED TO A PROPERLY
GROUNDED THREE-PRONG RECEPTACLE. IF THE RECEPTACLE IS NOT THE PROPER
GROUNDING TYPE, CONTACT AN ELECTRICIAN. DO NOT REMOVE THE GROUNDING PRONG
FROM THE PLUG.

Plug the oven into a dedicated circuit outlet of the appropriate NEMA style and rating. The plug and
cord supplied is suitable for 208 or 240 volt operation.

Measure the incoming power supply with a volt ohmmeter. The supply MUST measure 197 volts with
no load as a minimum.

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– 5 –

START-UP TESTING

After the oven is connected to the supply circuit, perform the following tests to ensure that the oven
is operating properly.

Lamp Test

Turn the oven on by pressing the ON/OFF button. After a few
seconds, the display will settle on Recipe 1. At this point, hold down
the 1 button and push the 8 button at the same time. The display at
right appears:

Press the 1 button to begin the lamp test. The door will lock and the
lamps will each turn on briefly. After each of the four lamps are
turned on successfully, the display will report Lamp OK. When all
lamps pass, the oven will automatically return to the normal
operating mode.

If a lamp does not operate properly, the test will stop and the display
will show the number of the lamp that failed. The display at right is
an example:

Press any key to continue the test. At the end of the test, the display
will show “Lamp Check Finished.” If a lamp was reported as an
error, retest and verify visually that the lamp did or did not light.

If either of the two light sensors failed to operate during the test, you
will see the message at right at the end of the test:

If either a lamp or a sensor are reported as a problem, call your local
Hobart-authorized service office.

Would You Like To

Check The Lamps
1 = Yes 2 = No

Lamp 2

Lamp Error

---->> Press Any Key <<----

Lamp Check Finished

No Bottom Sensor

Voltage Test

After performing the lamp test, the display will return to Recipe 1.
On a new oven, the display will say Empty Recipe.

Press the green START button. The door will lock, the blower will
start, and a few seconds later the cycle will end and the door will
unlock. Now hold down the 1 button and push the 7 button at the
same time. The display reports the system voltage.

The voltage reported on this screen must match the nominal
system voltage supplied to the oven, either 208 Volts or 240 Volts.
Call your local Vulcan-authorized service office if it does not match.

– 6 –

Recipe 1 0:00

EMPTY RECIPE

208 Volts

Single Phase

OPERATION

WARNING: THE OVEN AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING, CLEANING,

OR SERVICING THE OVEN.

PRECAUTIONS

• Never attempt to open the oven door while a cook cycle is in progress. Never attempt to operate
the oven with the door open.

• Do not operate the oven without the grill, or with missing or damaged lamp shields.

• Never operate the oven without food inside.

• Before removing a pan from the oven, prepare a place to put the hot pan. Do not place the hot
pan on wood, plastic, Formica, or other burnable surfaces.

• When removing pans from the oven, use a pan grabber and hot pads designed to withstand high
temperatures.

UTENSILS TO USE

We recommend using FlashWare (9" and 12" Pyroceram), Metal, Aluminum and Silverstone pans.

Approved Never Use

FlashWare (Pyroceram) Steel Paper Stoneware
Silverstone coated aluminum Ceramic Boil-In Bag Pouches Roasting Bags
Corelle Dishes Aluminum Plastic

COOKING HINTS

Experiment. Try various combinations of time and power levels until each of your recipes results in a
perfectly cooked product. Some rules of thumb:

• Generally, try to cook as quickly as possible. Cooking for longer periods of time at lower intensities
may reduce the quality of the food.

• Consistent preparation and storage of foods to be cooked in the oven will result in consistent
cooking results. If oven settings are developed for a pizza using refrigerated and portioned
ingredients, then this is how the pizza should be prepared every time or the results will vary.

• Cooking times should
more dry and porous, foods are flat or thin, uniform size pieces are cooked, or black cooking pans
are used.

• Cooking times should
of food items in a portion is increased, and foods have high moisture content.

• Keep the lamp shields and interior cavity clean. Baked-on grease and food particles will reduce
the efficiency of the oven and affect the cooking process. See the CLEANING section of this
manual.

decrease

increase

if foods are room temperature instead of refrigerated, foods are

when foods are thick and/or dense, foods are frozen, the number

• For best results when experimenting with a new product or recipe, try to start each test cook cycle
from a cool oven.

– 7 –

CONTROLS — Model HFB6

DISPLAY WINDOW

DISPLAY The display screen, located at the top of the control

panel provides a constant indication of the oven
status. It is also used for programming the oven and
for the display of information and diagnostic messages.

ADD
TIME

STOPSTART PAUSE

START Press this button to begin cooking with the programmed

recipe that is currently displayed. After this button is
pressed, the door will lock, the blower will start, and

1
2

6
7

ADD TIME Press this button after the cook cycle has completed

the oven will start cooking.

if additional cooking is desired. An additional 20

3
4

8
9

PAUSE Press this button while the oven is cooking to pause

seconds of cooking is done using the power settings
from the final step of the last recipe used.

the current cook cycle and unlock the door. Press the

5

0

START button to resume cooking at the point the
recipe was interrupted.

PROGRAM

MED

HI

SAVE

LO

CLEAR

BROWN

POWER

ON

OFF

STOP Press this button while the oven is cooking or paused

to stop the cook cycle.

1 Thru 0 Each of these buttons can have a recipe assigned to

it. Press one of these buttons to display that recipe.

PL-53506

HI This mode uses maximum power, applied from both

the top and bottom of the oven for the duration of the
cook cycle. It is best suited for cooking appetizers,
meats, par-baked pizzas and fresh dough.

MED This mode begins to decrease the amount of energy

applied from the top and bottom of the oven as the
cook cycle progresses. It is best suited for baking
cookies.

LO This mode significantly reduces the amount of energy

applied to the top and bottom of the oven. It is best
suited for bread products, and most frozen products.

BROWN This mode applies maximum power from the top of the

oven only. It is best suited for toasting bagels and
sandwiches, melting cheese and browning the top of
foods.

SAVE Pressing this key will save the current cook mode and

time in one of the nine preset locations. The display
will prompt you to select one of the nine presets.

CLEAR Pressing this key will clear any numeric entry field.

Pressing it again will return the display to the standby
or ready mode.

ON – OFF Turns the control On or Off.

– 8 –

TO START COOKING

You can start cooking immediately by choosing a cook mode, a length of time and pressing the START
button. Press one of the four cook mode buttons (HI, MED, LO, or BROWN). Then enter the desired
cook time in minutes and seconds( up to 99:99 max.) using the number buttons. Press START and the
cook cycle will begin. The oven automatically adjusts the top and bottom power ratios to provide
optimum performance. During a cook cycle, it is normal to see the lamps turn on and off at various
times. A lower power setting will result in more lamp “off time”. Also, a very hot oven will result in more
lamp “off time”, especially at the lower power settings.

CHOOSING A POWER LEVEL

Use the table below to determine the suggested power level for the following types of food. Experiment
with the times and power levels to find the desired settings for your products.

HI MED LO BROWN

Most frozen appetizers/finger foods Cookies Biscuits Bagels

Meats Brownies Muffins Sandwiches

Seafood Breads Bread Sticks Melting Cheese

Fresh Dough Pizza Cheese Sticks Top Browning

Par-baked Dough Cinnamon Rolls

Frozen Pizza/Pastries

Lasagna (reheating)

CHOOSING A COOK TIME

Flash

Most items cooked in the

Bake oven will cook in approximately one half to three-quarters of the
time recommended for a conventional oven. Check the food after cooking for half the recommended
time. Add time, if necessary, to obtain the desired cooking results.

TO SAVE A RECIPE (Presets)

Once you have determined the appropriate settings for a food item, you can store those settings in any
one of the 20 preset locations. After selecting the desired settings, simply press the SAVE button. The
display will prompt you to elect one of the 20 available storage locations, using the number buttons.
Follow the prompts to confirm your choice and to save your settings.

To start a saved recipe using the presets, simply press the number of the preset, verify that the display
shows the desired setting, and press the START button.

– 9 –

PASSWORD PROTECTION FOR PRESETS

This oven comes with an optional password protection to prevent accidental changes to the settings
stored in the nine preset locations.

To Enter a Password

1. Press and hold down the “1” button and press the “6” button simultaneously.

2. At the prompting of the display, enter a four digit password.

3. Follow the instructions on the display to either save or disable the password.

• Be sure to save the password, even if you want to disable it.

• If a password has already been enabled, you must enter the current password before it will
allow you to change or disable the password.

If You Forget Your Password

1. Turn the oven “OFF”.

2. Hold down the STOP button as you press the ON/OFF button to turn the oven on.

3. Release the STOP button. The display will briefly show the current password.

STOPPING OR PAUSING A RECIPE

To stop a cook cycle, press the STOP button. The door will unlock and the product can be removed.
Use caution as the product and the oven will be extremely hot.

To pause a cook cycle, press the PAUSE button. The door will unlock
and the product can be examined. If more cooking is desired, close

Recipe 1 0:47
HI POWER

the door and press START and cooking will continue from the point
at which it was paused. If no more cooking is needed, press the STOP

----->> PAUSED <<-----

button and the cooking cycle will be ended.
After a cook cycle ends, the oven will beep every few seconds until

the door is opened or a button is pressed. This is to remind the
operator that the food is still in the oven.

Extending the Cook Time

To extend the cook time, press the ADD TIME button after the cook cycle has completed. The oven
will cook for an additional 20 seconds at the last recipe's ending intensities. You can stop the extended
cook cycle at any time by pressing the STOP or PAUSE buttons.

An asterisk (*) appears next to the recipe number in the display
indicating that it is cooking in an extended mode. The TIME value is

Recipe * 1 0:19
MED POWER

set to 20 seconds and it begins counting down as usual.

Time 1:30

BLOWER

The oven blower turns off automatically after approximately 4 minutes of nonuse, adding to the oven's
energy efficiency.

– 10 –

CLEANING
WARNING: DISCONNECT ELECTRICAL SUPPLY BEFORE CLEANING THE OVEN.
WARNING: THE OVEN AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING, CLEANING,

OR SERVICING THE OVEN.
The interior cleanliness of the

Flash

Bake oven is essential to ensure maximum efficiency of your oven.
Keeping the oven clean and free of food debris will minimize the possibility of smoke and odors from
food stuck on the lamp shields and interior walls.

The interior of the oven cavity is lined with highly reflective materials that allow the oven to cook with
exceptional speed. These materials MAY NOT, under any circumstances, be cleaned with abrasive
materials or chemicals that are not recommended for aluminum. If the non-recommended type
chemicals are used, they can etch and scratch the cavity, causing a loss in efficiency and result in the
need for repairs.

APPROVED CLEANING MATERIALS AND PROCEDURES
Cleaners

• Mild dish soap - Use any mild food service type dish soap for the interior cleaning. Be sure that
the soap is non-caustic.

• Citrus 2000 Multi-Purpose Ready To Use

• Pro Formula 409/Pro Formula 409 Degreaser - Use for interior walls.

• Windex Powerized Formula - Use for cleaning the door window interior and exterior.

• Norcross Bar-Be-Que and Grill Cleaner - Use this to clean the stainless steel grill. Only clean the

grill outside of the oven.

• FDA food quality sanitizer for cooking surfaces.

Cleaning Tools

• Terry towel cloth - Food service quality.

• Nonabrasive pad - Institutional quality-certified nonabrasive. (Example: White 3-M).

• Small wire brush - Used to clean the rollers on the grill assembly only.

•

Flash

Bake lamp shield scraper.

Always rinse cleaned surfaces to ensure all the soap and chemicals have been removed, then wipe
dry with a soft clean cloth.

It is recommended that you clean the oven after each shift. If your operation is extremely busy, it may
be necessary to wipe out the oven during a shift until you are able to perform the detailed cleaning.

1. Allow oven to cool before starting the cleaning process.

2. Lift the door to the UP position.

3. Remove the grill and set aside. Clean the stainless steel grill with a non-caustic grill cleaner,
using a small wire brush. The grill MUST be cleaned only when it is out of the oven.

– 11 –

4. To start the interior cleaning, use a cloth dampened with one of the recommended cleaners. Be
sure that the soap is non-caustic. Wipe the food debris out of the oven, working from the back
forward. Do not pour cleaning liquids into the oven. Always use a cloth dampened with the

cleaning fluids.

Flash

5. Using a

Bake lamp shield scraper, scrape the lower lamp shield to loosen all residual food.

Repeat step 4 by wiping the cavity out, working from the back forward.

6. Remove the upper lamp shield and clean as recommended in REMOVING AND INSTALLING
THE TOP LAMP SHIELD, page 13.

7. Dampen a clean cloth with one of the recommended cleaners and wipe out the interior wall
surfaces to remove any grease or spatters. Work from the back of the oven forward. Repeat this
step several times if necessary.

8. Next, use a small wire brush to clean the drive rollers. Make sure you remove any buildup so the
rollers spin freely. After brushing, clean the rollers with a mild soap and water solution. Rinse
thoroughly and dry with a soft clean cloth. Test the rollers by spinning them. The drive roller on
the right side in the center of the oven cavity will not spin by hand.

9. Clean the interior surface of the front door with a terry cloth towel and recommended cleaner.
Wipe the exterior edges of the door and frame, paying close attention to the gasket.

10. Clean the inside of the oven door window with a cloth dampened with window cleaner. If
necessary, use a nylon scouring pad to remove baked on grease. Wipe the window clean with
a cloth or paper towel dampened with window cleaner. CAUTION: Do not use abrasives on the

reflective inside door surface.

11. With a clean cloth dampened with a food quality sanitizer, wipe the entire interior cavity of the
oven, working from the back forward.

12. Clean the exterior of the oven with a soft cloth dampened sparingly with a commercial stainless
steel cleaner. The outside of the oven door window may be cleaned with a cloth dampened with
window cleaner.

13. NEVER touch the cooking lamps. If contact does occur, gently wipe the lamps with a clean, lint­free cloth dampened with rubbing alcohol.

– 12 –

REMOVING AND INSTALLING THE TOP LAMP SHIELD

Turn the oven off before removing the lamp shield.
The lamp shields MUST be kept clean to ensure maximum efficiency of the oven. If the lamp shields

are dirty, foods may not cook as quickly or as thoroughly as specified in the programmed recipes. The
lamp shields should be cleaned any time food or grease begins to build up on the shield surface.
Keeping the shields clean will prevent residue from baking on the shields and burning.

The upper lamp shield is easily removed with the door open. Lift the front edge of the lamp shield over
the retaining feature (Fig. 2) and pull it toward you.

To reinstall the lamp shield, place it on its rails and gently push it into the oven until it stops. Be sure
the lamp shield is properly seated behind the retaining feature.

OVEN DOOR

LIFT LAMP SHIELD
OVER RETAINING FEATURE
PULL LAMP SHIELD TOWARD YOU

UPPER LAMP SHIELD

LOWER LAMP SHIELD

(NON REMOVABLE)

Fig. 2

LAMP SHIELD RAIL

PL-52646

It is recommended that you obtain spare lamp shields so that dirty ones can be replaced quickly. Dirty
shields can then be cleaned during off-peak times.

The lamp shield is made of a special transparent material with specific properties. Replace
shield only with official

Flash

Bake oven replacements.

– 13 –

MAINTENANCE

WARNING: THE OVEN AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING, CLEANING

AND SERVICING THE OVEN.
WARNING: DISCONNECT THE ELECTRICAL SUPPLY BEFORE PERFORMING ANY MAINTENANCE

ON THE OVEN.
Do not remove the oven covers or attempt to open the control cabinet. Doing so will void the warranty.

There are no user serviceable parts inside.

INSPECTING THE OVEN

At least once each day, when the oven is cool, visually inspect the inside of the oven. Make sure both
lamp shields are in place, clean, and unbroken. Make sure there are no obvious signs of damaged,
worn, or broken parts.

FUSES

There are two replaceable fuses located on the back of the oven (Fig. 3). Replace these fuses only with
Class CC 3 Amp Fuses.

Fuses

Blower

Circuit

Protectors

#1

#2

OVEN REAR

Fig. 3

PL-52647

CIRCUIT PROTECTORS

There are two resettable circuit protectors located on the back of the oven (Fig. 6). A tripped protector
is indicated by the reset button sticking out. To reset the protector, press the button.

LAMP REPLACEMENT

All lamps MUST be replaced by your local Hobart service representative.

– 14 –

TROUBLESHOOTING

PROBLEM

No power to the oven.

No power to the oven controls or display.

Blower not operating.

Oven not cooking.

POSSIBLE CAUSES

1. Oven power cord is not plugged into the wall outlet.

2. Main branch circuit breaker is blown.

1. Tripped circuit protector. Reset by pushing the button.

2. Blown fuse(s). Replace with Class CC 3 Amp fuses
only.

1. Obstruction in the blower air flow path. Initiate a cook
cycle and check for foreign objects in the blower air flow
path.

2. Blown fuse(s). Replace with Class CC 3 Amp fuses
only.

1. Check the recipe settings. Make sure the settings are
valid. Be sure time setting is not zero.

Display screen does not light up.

Grill does not rotate.

Door does not lock.

No "High Power".

1. Circuit Protector #1 located at rear of oven (see Fig. 3)
has blown. Press reset button.

1. Circuit Protector #2 (see Fig. 3) has blown. Press reset
button.

1. Circuit Protector #2 (see Fig. 3) has blown. Press reset
button.

1. Circuit Protector #2 (see Fig. 3) has blown. Press reset
button.

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ERROR MESSAGES

Under certain conditions, the oven will emit a short trill tone alarm when the operator presses a button. This
indicates that something is preventing the oven from operating properly. Check the display screen for the
following messages:

MESSAGE

HIGH POWER IS NOT ON

--> Press ANY key <--

[16] DOOR IS OPEN

DOOR IS NOT CLOSED

[18] OVEN OVERHEATED

ALLOW TO COOL

[15] LAMPS ARE ON *!

H.V. IS TURNED OFF

SUGGESTED ACTION

1. Press any button to clear the message.

2. Restart the cook cycle.
Door detected open after cook cycle started.

1. Check for obstructions that may be keeping the
door from closing properly.

2. Restart the cook cycle.

Door detected open at start of cook cycle.

1. Check for obstructions that may be keeping the
door from closing properly.

2. Restart the cook cycle.

1. Press any button to clear the message.

2. Make sure the blower is on.

3. Check vent/duct for obstructions.

4. Close door, wait for the oven to cool.

5. Restart the cook cycle.

An irregular lamp condition was detected.

1. Turn the oven off.

2. Turn the oven on.

3. Restart the cook cycle.

[19] UPPER LAMP

SHIELD OUT OF PLACE

1. Check that the upper lamp shield is properly
installed.

2. Restart the cook cycle.

SERVICE

If these actions do not reset the oven and allow the cooking cycle to begin, contact your local Hobart
authorized service office.

FORM 34485 (May 2000) PRINTED IN U.S.A.

– 16 –