Turbo Chef Technologies C3 Ab Users Manual Service

PN: TC3-0215 Rev. D January 2, 2004

C3/AB, C3/C, C3Multi, C3/CMulti

CONVECTION MICROWAVE OVEN

SERVICE AND REPAIR MANUAL

TURBOCHEF TECHNOLOGIES INC.

www.turbochef.com

10500 Metric Drive, Suite 128, Dallas, Texas 75243 USA

(800) 908 TURBO (8-8726)

.

TurboChef Technologies, Inc.

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Table of Contents

READ THIS FIRST …………………………………………………………………………… i

Important Safety Instructions ……………………………………………………………….. ii

Precautions to Avoid Possible Exposure to Excessive Microwave Energy ……………. iii

Precautions to be Observed Before and During

Servicing to Avoid Possible Exposure to Excessive Microwave Energy ………………. iv

Grounding Instructions ………………………………………………………………………. v

Power Cord Replacement …………………………………………………………………… v

RF Interference Considerations …………………………………………………………….. vi

Chapter 1 Installation Specs

Oven Description …………………………………………………………………. 1-2

Installation ………………………………………………………………………… 1-2

Oven Location

1-3

Chapter 2 Cleaning & Care

Basic Cleaning Procedures ……………………………………………………… 2-2

Chapter 3 Theory of Operation

Theory of Operation Description ………………………………………………… 3-2

Glossary of Common Operating Terms ………………………………………….. 3-3

Programming Mode 3-4

Chapter 4 Fault Codes

Fault Code Introduction ………………………………………………… 4-2

Fault Code Summary Matrix ………………………………………….. 4-3

Chapter 5 Test

Test Function Detailed Description ……………………………………………… 5-2

Passwords for Operating C3 ovens ………………………………………….. 5-3

Chapter 6 Electrical Compartment & Controls

Electrical Component Locations C3/AB 6-2

Electrical Component Locations C3/C 6-3

Electrical Component Locations C3/Multi 6-4

Electrical Component Locations C3/C Multi ………………… 6-5

Electrical Component Parts Lists 6-6

Control Panel Detail 6-8

Control System Troubleshooting 6-9

(SMT) I/O Board Troubleshooting 6-10

Chapter 7 Cook Door

Door Switches and Circuit Breakers 7-2

Door Switch Adjustment 7-4

Door Removal and Replacement ………………………………………………. 7-10

TurboChef Technologies, Inc.

Door Removal and Replacement Left Side Parts List 7-13

Door Removal and Replacement Right Side Parts List 7-16

C3/C AND C3/CMULTI Door Assy and Parts List 7-18

Chapter 7 Cook Door

C3/AB and C3MULTI Door Assy and Parts List 7-21

Chapter 8 Convection Circuit

Catalytic Converter ………………………………………………………………. 8-2

Convection Element and Thermocouples ……………………………………… 8-3

How to Turn Heaters ON & OFF …………………………………………. 8-4

Changing Heater Operating Voltage …………………………………………. 8-5

Heater Circuit Defective Messages …………………………………………. 8-6

Convection (Blower) Motor Operation ……………………. 8-9

How to Turn Blower On ……………………. 8-9

Checking Input Voltage at Motor Controller ……………………. 8-9

Blower Circuit Defective Messages ……………………. 8-10

SP-200 Blower Motor Controller Fault Codes & Troubleshooting……………….8-11

Delta Blower Motor Controller Fault Codes & Trobleshooting…………………. 8-13

Convection Motor Parts List …………… ………. 8-16

Chapter 9 Microwave Circuit

Measuring for Microwave Radiation Leakage ………………………………… 9-2

Microwave Circuit Defective Messages………………………………………… 9-3

Magnetron & Monitor Circuits…………………………………………………………9-3

Magnetron High Voltage Power Supply………………………………………….. 9-5

Magnetron Testing ……………………………………………………………….. 9-6

Magnetron Removal and Replacement ………………………………………… 9-6

Component Testing (Diode, Capacitor, Transformer)…………………………… 9-7

Transformer Specifications ……………………………………………………… 9-8

Waveguide Components Parts List 9-10

Chapter 10 (SMT)I/O BOARD & Schematics

C3/AB Schematic ………………………………………………………………….. 10-2

C3/C Schematic 10-3

C3Multi Schematic 10-4

I/O Board Layout 10-5

i

READ THIS FIRST

Before working on the TurboChef Technologies, Inc. C Series oven you must first read the safety

instructions on the following pages. The C3 series oven is a combination convection/microwave oven.

While servicing this oven, an RF meter must be used at all times to check for microwave leakage. This RF

reading must be recorded on your work invoice.

Very often poor cleaning will result in microwave leakage. Please refer to chapter 2, Cleaning & Operation,

for information on the proper cleaning procedures.

Before removing the metal skin to access the electrical components in this oven, the power must be shut

off and the oven unplugged. Wait at least one full minute before removing the oven skin so that the

magnetron circuit can self–discharge. FAILURE TO DO SO MAY RESULT IN DEATH OR SERIOUS

INJURY.

PLEASE NOTE: THIS MANUAL ONLY COVERS C3/AB OVENS PRODUCED BY THE BLODGETT

OVEN CORPORATION, C3MULTI OVENS PRODUCED TURBOCHEF, C3/C AND C3/CMULTI OVENS

PRODUCED BY TURBOCHEF TECHNOLOGIES IN CHINA.

This manual is divided into ten (10) chapters as follows:

1. INSTALLATION SPECS - This chapter includes oven specifications and the parameters for

proper installation.

2. CLEANING & OPERATION - Improper cleaning can and will affect the operation of this oven. This

chapter includes a brief description of the cleaning and operation

procedures of the oven and the procedures to edit or change a

cooking program.

3. THEORY OF OPERATION - This chapter provides a total oven overview of all major subsystems in

the oven. Additionally, it provides a list of major terms and

programming instructions.

4. FAULT CODES - This chapter includes information on all fault codes currently

programmed in the oven to display in the event of a major mulfucntion.

5. TEST - This chapter details the Test Mode, which allows the technician to

operate individual components or section of the C3 SERIES oven.

Using this feature will isolate most electrical troubleshooting

problems.

6. ELECTRICAL COMPARTMENT - This chapter identifies the electrical compartment components,

including the smt board (computer board) and a troubleshooting guide.

Use the key to help isolate electrical troubleshooting problems.

7. COOK DOOR - This chapter includes information on the Cook Door adjustment,

assembly and troubleshooting techniques.

8. CONVECTION CIRCUIT - This chapter provided information on the convection and blower motor

speed control. Removal and cleaning of the catalytic converter are

also provided.

9. MICROWAVE CIRCUIT - This chapter includes information on the microwave circuit and stirrer

motor.

10. I/O Board/Schematics - This chapter includes information on I/O board and schematics on

ovens currently in the field (latest production is only represented)

This Service and Repair manual is set up for use by qualified technicians only. If you are unfamiliar

with this oven, call TurboChef Technologies Inc.

ii

IMPORTANT SAFETY INSTRUCTIONS

WHEN USING ELECTRICAL APPLIANCES, THE FOLLOWING

BASIC SAFETY PRECAUTIONS SHOULD BE STRICTLY ADHERED TO:

WARNING!!

To reduce the risk of burns, electric shock, fire, injury to persons or exposure to excessive

microwave energy:

1. Read all instructions before using the appliance.

2. Read and follow the specific PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE

MICROWAVE ENERGY found on pages iii & iv.

3. This appliance must be grounded. Connect only to properly grounded outlet. See GROUNDING

INSTRUCTIONS found on page v.

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

5. Some products such as whole eggs and sealed containers - for example, closed glass jars - may

explode and SHOULD NOT be heated in this oven.

6. Use this appliance only for its intended use as described in the manual. DO NOT use corrosive

chemicals or vapors in this appliance. This type of oven is specifically designed to heat, cook, or dry

food. It is NOT designed for industrial or laboratory use.

7. Children SHOULD NOT use this appliance.

8. DO NOT operate this appliance if it has a damaged cord or plug, if it is not working properly, or if it has

been damaged or dropped. See POWER SUPPLY CORD REPLACEMENT found on page v.

9. This appliance should be serviced only by qualified service personnel. Contact the nearest authorized

service facility for examination, repair or adjustment.

10. DO NOT cover or block any openings on the appliance.

11. DO NOT store this appliance outdoors. DO NOT use this product near water - for example, near a

kitchen sink, in a wet basement, or near a swimming pool.

12. DO NOT immerse cord or plug in water.

13. Keep cord away; from heated surfaces.

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

15. DO NOT use a water jet for cleaning.

16. See the Maintenance section of this manual.

17. To reduce the risk of fire in the oven cavity:

a) DO NOT overcook food. Carefully attend appliance if paper, plastic, or other combustible materials

are placed inside the oven to facilitate cooking.

b) Remove wire twist-ties from paper or plastic bag in oven.

c) If materials inside the oven should ignite, keep oven door closed, turn oven off, and disconnect the

power cord, or shut off power at the fuse or circuit breaker panel.

d) DO NOT use the cavity for storage purposes. DO NOT leave paper products, cooking utensils, or

food in the cavity when not in use.

SAVE THESE INSTRUCTIONS

iii

PRECAUTIONS TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

1. DO NOT attempt to operate this oven with the door open since open-door operation can result in

harmful exposure to microwave energy. It is important not to defeat or tamper with the safety interlocks.

2. DO NOT place any object between the oven front face and the door or allow soil or cleaner residue to

accumulate on the sealing surfaces.

3. DO NOT operate the oven if it is damaged. It is particularly important that the oven door close properly

and that there is no damage to the:

a) Door (bent).

b) Hinges and latches (broken or loosened).

c) Door seals and sealing surfaces.

4. The oven SHOULD NOT be adjusted or repaired by anyone except properly qualified service

personnel.

SAVE THESE INSTRUCTIONS

iv

PRECAUTIONS TO BE OBSERVED BEFORE

AND DURING

SERVICING TO AVOID POSSIBLE EXPOSURE

TO EXCESSIVE MICROWAVE ENERGY

1. DO NOT operate or allow the oven to be operated with the door open.

2. Make the following safety checks on all ovens to be serviced before activating the magnetron or other

microwave source, and make repairs as necessary:

a) Interlock operation.

b) Proper door closing.

c) Seal and sealing surfaces (arcing, wear, and other damage).

d) Damage to or loosening of hinges and latches.

e) Evidence of dropping or abuse.

3. Before turning on microwave power for any service test or inspection within the microwave generating

compartments, check the magnetron, wave guide, or transmission line, and cavity for proper alignment,

integrity, and connection.

4. If the oven is operative prior to servicing, a microwave emission check should be performed prior to

servicing the oven. Refer to page 6-2 of this manual for microwave leakage testing procedure.

5. Any defective or mis–aligned components in the interlock, monitor, door seal, and microwave

generation and transmission systems shall be repaired, replaced, or adjusted by procedures described

in this manual before the oven is released to the owner.

6. A microwave leakage check to verify compliance with the Federal Performance Standard MUST BE

performed on each oven prior to release to the owner. Refer to page 6-2 of this manual for microwave

leakage testing procedure.

SAVE THESE INSTRUCTIONS

v

GROUNDING INSTRUCTIONS

This appliance MUST BE grounded. In the event of an electrical short circuit, grounding reduces the risk of

electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord

having a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly

installed and grounded.

WARNING!!

Improper use of the grounding can result in a risk of electric shock.

Consult a qualified electrician or serviceman if the grounding instructions are not completely understood, or

if doubt exists as to whether the appliance is properly grounded.

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

serviceman install an outlet near the appliance.

POWER SUPPLY CORD REPLACEMENT

If the power supply cord is damaged, it MUST BE replaced by the manufacturer or its service agent or a

similarly qualified person in order to avoid a hazard.

General Note about Construction

Please be advised that the TurboChef C3 series ovens are manufactured in various locations, as such the

C3/C and C3/Cmulit are constructed using the Metric System. Therefore, it is very important to note the

model number of the unit you are servicing to ensure you get the correct Metric component. Care has

been given in this manual to list the different part numbers for the Metric and Imperial (C3/AB and C3Multi)

ovens. In addition, please note that most hardware on the C3/C and C3/Cmulti oven is metric unless

otherwise specified.

SAVE THESE INSTRUCTIONS

vi

RF INTERFERENCE CONSIDERATIONS

This oven generates radio frequency signals. This device has been tested and determined to be in

compliance with applicable part of FCC part 18 requirements and to the protection requirements of Council

Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic

compatibility at the time of manufacture. However, some other equipment may exhibit sensitivity to signals

below these limits resulting in interference with that equipment.

If your equipment experiences interference, the following steps should be considered:

1. Increase the physical separation between this oven and the sensitive equipment.

2. If the sensitive device can be grounded, do so following accepted grounding practices.

3. If battery powered microphones are being affected, insure that the batteries are fully charged.

4. Keep sensitive equipment on electrically separate circuits, if possible.

5. DO NOT route intercom wires, microphone wires, or speaker cables near oven.

SAVE THESE INSTRUCTIONS

CHAPTER 1

INSTALLATION SPECS

TurboChef Technologies, Inc. C series

1 - 2

OVEN DESCRIPTION

SPECIFICATIONS C3/AB, C3MULTI, C3/C, AND C3/CMULTI

Dimensions (single unit) 29” W x 25.5” H x 29.5” D (73.66 cm x 64.77 cm x 74.93 cm)

Dimensions (double stacked units) 29” W x 43” H x 29.5” D (73.66 cm x 109.22 cm x 74.93 cm)

Maximum Input 7.2 kW

Power Supply

US (1 φ

) All Models

208 VAC, 60Hz, 1 φ, 35 amp, 3 wire including ground

240 VAC, 60 Hz, 1φ, 30 amp, 3 wire including ground

Europe(1φ

) All Models

230-240 VAC, 50 Hz, 1φ, 30 amp, 3 wire including ground

US (3φ) C3Multi and C3/Cmulti

208 VAC, 60Hz, 3 φ, Delta, 30 amp, 4 wire including ground

240 VAC, 60 Hz, 3φ, Delta, 22 amp, 4 wire including ground

Europe (3φ) C3Multi and C3/Cmulti

380-415 VAC, 50 HZ, 3φ, WYE, 15 Amp, 5 wire including ground

230-240 VAC, 50 HZ, 3φ, Delta, 22 Amp, 4 wire including ground

Microwave Frequency 2.45 GHz

Connections including ground The unit is supplied with a 6’ power cord that includes:

US (1 φ) NEMA 6-50P

Europe(1φ

φφ

φ) 32A IEC 60309 plug

US (3 φ) NEMA 15-50P

Europe(3φ

φφ

φ) 32A IEC 5 Pin plug

The outlet box, receptacle, and wall plate ar

e to be furnished by

the installing contractor.

Maximum Power Usage

Convection Oven

Microwave Oven

5.2 kW

2.0 kW

TABLE 1 - 1 Oven Specifications

INSTALLATION

The TurboChef Technologies, Inc. oven is

manufactured to comply with applicable CE, ETL,

FDA, and FCC requirements. In addition, the unit

is ETL classified to NSF 4. Note: Some

European models may or may not be certified

under US FDA and/or ETL regulations. All

equipment is designed and certified for safe

operation when installed in accordance with local

and/or national codes. Many local codes exist,

and it is the responsibility of the owner and

installer to comply with these codes. In addition,

if the oven is not UL or ETL listed it MAY NOT BE

USED or SOLD in the U.S.A or any of its

territories.

In no event shall the manufacturer assume any

liability for damages or injuries resulting from

installations which are not in compliance with the

instructions and codes listed above.

WARNING!!

DEATH, INJURY, AND EQUIPMENT DAMAGE

could result from improper installation of this

oven or installation of an oven which has

been damaged during shipment or storage.

Either of these conditions could void the

equipment warranty.

DO NOT INSTALL an oven suspected of

damage.

INSTALL this oven according to the policies

and procedures outlined in this manual.

Installation Specs

1- 3

OVEN LOCATION

The well planned and proper placement of your

oven will result in long term operator convenience

and satisfactory performance.

Be sure to place the oven in an area which is

accessible for proper operation and servicing.

The countertop or work surface must be able to

support the weight of 250 pounds. The

manufacturer shall not assume liability for

damage or injury resulting from improper

installation of equipment including temporary or

unstable work stations or countertops.

There must be 2” (5.08 cm) between the top of

the unit and any shelf or other surface.

The oven must be installed level front to back

and side to side. The oven legs may be bolted to

the counter top if desired.

Countertop surface must be at least 30 inches

deep. Operator is responsible for proper

placement on the countertop. TurboChef will not

be responsible should an oven fall off a

countertop due to improper placement or use by

the customer. Oven placement shall be readily

accessible by a service agent. Additional charges

ma be incurred by the customer should product

placement mandate required service labor

charges due to accessibility to the unit.

CHAPTER 2

CLEANING & OPERATING

TurboChef Technologies, Inc. C Series

2-2

BASIC CLEANING PROCEDURES

PROBLEMS ASSOCIATED WITH IMPROPER

CLEANING

The oven may not be operating correctly because

it is not being cleaned properly. If the door is

leaking microwaves, erratic operation of the

display and other electrical components can

occur. Also food deposits left in the oven will turn

into black carbon from the high heat. Carbon can

cause arcing inside the cooking area and can

reflect energy back to the magnetron.

If a customer tells you they are experiencing

cooking performance problems, carefully inspect

the cooking platter and waveguide cap for chips.

If the platter or waveguide cap are chipped and

soaked in water, they will absorb the water. The

water will then be heated instead of the food

product. The chipped part must be replaced.

DAILY CLEANING

1. Carefully remove the ceramic cooking platter

and wave–guide cap. Spray both pieces only

with TurboCare®

®®

® Oven Cleaner and set

aside to allow the cleaner to penetrate. DO

NOT soak the Ceramic Cook Platter or

Waveguide Cap in water.

2. Clean the ceramic cooking platter, and wave

guide cap using brushes and scrub pads.

Rinse to remove all cleaner and debris.

Inspect for damage and replace as required.

3. Reinstall the clean wave–guide cap into

the oven. This will protect the wave–guide

seal while the cook chamber is cleaned.

4. To clean the interior of the oven, use a 3”x5”

green scrub pad. Use only TurboCare®

®®

®

Oven Cleaner on tough spots. DO NOT

wash out the interior cooking area. The

waveguide quartz seal is not a water tight

seal. Wipe out the oven with a damp rag. If

the door area needs cleaning, be careful not

to damage the small rubber gasket around

the door shunt area.

5. Remove the lower access panel and grease

collection pan. Empty, clean and reinstall the

pan.

6. Verify the louvers on the front and side of the

oven are clean of lint and unobstructed.

MONTHLY CLEANING

Remove and clean the exhaust cover from the

back of the oven.

Cook Platter

Waveguide

Cap

Grease

Tray Lower Access

Panel

Exhaust

Cover

FIGURE 2 - 1 Cleaning

CHAPTER 3

THEORY OF OPERATION

TurboChef Technologies, Inc. C Series

3-2

INTRODUCTION

The TurboChef C3/C oven utilizes two independent heat transfer mechanisms in order to rapidly cook food.

The systems are as follows: Convection and Microwave energy. By combining these mechanisms and

with our ability to control each mechanism independently, we are able to reduce the cook time of most

foods by 70%-90%.

For the purpose of this manual we will identify each independent heat transfer mechanism individually. For

instance, if an oven is experiencing difficulties browning the food, you know to focus on the Convection

Circuit not the Microwave System. If an oven is browning the food but not heating the food, you will know to

focus on the Microwave System.

The following block diagram represents the oven’s different systems and their critical components. If you

are experiencing problems with any of the components listed below, please turn to the appropriate section.

SECTION 8

Convection System

• Convection.

Heater

• Blower

Controller

• Convection

Blower

• Catalytic

Converter

SECTION 9

Microwave System

• Magnetron

• HV Transformer

• Filament Trans.

•

HV Capacitor

• Mechanical

Microwave

Components

SECTION 6

Control System

• I/O Board

• Keypad

• Display

• Mech. Relays

• SS Relays

Cooking

Process

Food Products

Profiles

Theory of Operation

3-3

GLOSSARY OF COMMON

OPERATING TERMS

Display

- Primary interface to relay

messages to the operator.

Keypad

- Primary interface for the

operator to control the oven.

Cook Chamber

- Cavity in which the

food products are cooked.

PRODUCT RECIPES

Recipe

- The food product recipe

programming consists of total time,

percent of total time per event,

percentage of hot air flow (AIR) required

and microwave (MW) level required.

Cook Cycle

- Total time of operation for

a recipe.

Cook Event

– Segment of a recipe, up

to 6 events can be used for each recipe.

Duration

- Time, in percent of total time

of a single cook event.

Air

- Percent of convection air flow

during a cook event.

MW

- Percent of microwave used during

a cook event.

Cook Temperature Set Point

-

Temperature should be a constant

parameter. The same cook temperature

should be used by all cook recipes.

MODES

Mode

– The software environment which

allows certain operations to occur. There

are several modes, STANDBY, COOK,

WARM UP and COOL DOWN in which

the oven can operate.

Standby Mode

- The standby mode is

similar to oven off. In standby there is no

power to the oven. There is power to the

control, however, the oven will not

operate in standby mode.

Cook Mode

- Mode used to perform the

normal oven operations, such as,

monitor the key pad for requests to cook

or change mode, and maintain the oven

at the cook temperature set point.

Warm–Up Mode

- Mode to bring the

oven up to the cook temperature set

point.

Cool–Down Mode

- Turns off all oven

components except the cooling fan and

circulation blower.

TurboChef Technologies, Inc. C Series

3-4

Programing

Edit Mode

Edit mode enables the operator to alter

Recipes and the Cook Chamber

Temperature (CC). To Access Edit Mode,

press the “Up” and “Down” Arrows Keys on

the keypad simultaneously. When

prompted, enter the Access Code “9” and

then press “Enter”.

Changing the Cook Chamber

Temperature

The first screen in Edit Mode allows you to

change the Cook Chamber Temperature

(CC) by pressing the “Up” and “Down” Arrow

Keys. The operator may adjust the

temperature between 350

o

F and 525

o

F in

25

o

F increments. Once you have selected

the desired temperature, press the “Enter”

Key to set CC.

Altering a Recipe

The C3 oven control has 64 unique Recipes

available for the operator. The Display will

show 1 page of 8 Recipe Groups. Each

Recipe Group contains 8 Subgroups or

Recipes. See Figures 3-1 and 3-2.

To alter a Recipe, enter Edit Mode as

described above. After you have entered

the Access Code and set CC, the screen will

display the 1

st

set of 8 Recipe Groups.

Now select the Recipe Group that contains

the individual Recipe you wish to alter.

Next, select which Recipe you wish to alter

by pressing the Soft-Key corresponding to

the Recipe Item. See Figure 3-2.

Figure 3

-

2: Edit Groups

Group A

1

st

ITEM 5

TH

ITEM

2

nd

ITEM 6

TH

ITEM

3

RD

ITEM 7

TH

ITEM

4

TH

ITEM

8

TH

ITEM

Figure 3

-

1: Edit Groups

EDIT GROUPS

GROUP A GROUP E

GROUP B GROUP F

GROUP C GROUP G

GROUP D GROUP G

Theory of Operation

3-5

Use the “Up” and “Down” keys to navigate

through a Recipe and use the Keypad and

the “Enter” key to alter any of the following

parameters:

COOK TIME: Total duration of the Cook

Cycle. Enter the desired time and press

“Enter”. Valid times are between 1 second

and 5 minutes.

Events 1…6: Use the keypad and “Enter”

key to enter values for % Time, % Air and %

MW.

The % Time for all Events must total

to 100%. The operating system will

not allow a combination of Events

that do not total to 100% or exceed

100%.

The % Air parameter is valid

between 10 and 100%. Note: If an

Event is unused, the %Air

parameter may be displayed as 0%.

It is only a default.

The % MW parameter is valid

between 0 and 100%.

Once the desired changes have been made,

you may test the recipe by pressing the

“Test” Soft-Key. This will execute the

displayed recipe. Once you are satisfied

with the Recipe, press “Save” to

permanently store your changes. Press the

“Back Arrow” 4 times to exit the Edit mode.

User Configurable Options:

The user may enable or disable the

following options:

Edit Mode: For security purposes the Edit

Mode can be disabled by pressing the “Back

Arrow” and “Enter” keys simultaneously and

entering the Access Pin: “T-I-D-E” &

“Enter”. When prompted select either “9” to

re-enable Edit Mode or any other key to

disable Edit Mode.

Done State: The Done State (Figure 3-4)

can be removed to eliminate the option to

Save an altered Time or the option to Cook

More.

To disable the Done State, press the “Back

Arrow” and “Enter” keys simultaneously and

Enter the Access Pin “D-O-N-E” and Enter.

When prompted, press “9” to re-enable or

any other key to disable the Done State.

Time State: This state can be removed to

prevent the User from adjusting the Total

Cook Time prior to pressing the “Start” Soft

Key to begin a Cook Cycle. See Figure 3-5.

Figure 3

-

3: Edit Groups

< GROUP 1 >

ITEM 1

COUNT 0

WARMING UP

% TIME %AIR %WAV

TEST

SAVE

COOK TIME 00:00

1 xxx 1

0 xxx

2 xxx 10 xxx

3 xxx 10 xxx

4 xxx 10 xxx

5 xxx 10 xxx

6 xxx 10 xxx

Figure 3

-

4: Done State

SAVE

TIME

COOK

MORE

DONE

TurboChef Technologies, Inc. C Series

3-6

To disable the Time State, press the “Back

Arrow” and “Enter” keys simultaneously and

“Enter” the Access Pin “T-I-M-E” and

“Enter”. When prompted, press “9” to re-

enable or any other key to disable the Time

State.

Passwords

Edit Mode: “Back and “Enter”

simultaneously. Enter Pin: “9” & “Enter”.

Test Mode: “Back and “Enter”

simultaneously. Enter Pin: “9-4-2-8” &

“Enter”.

Reset Control (Soft Restart): “Back and

“Enter” simultaneously. Enter Pin: “9-4-7-1”

& “Enter”.

Erase: “Back and “Enter” simultaneously.

Enter Pin: “3-7-2-7” & “Enter” When asked

“Erase Menu” press “3”.

Caution:

The Erase command will

PERMANENTLY DELETE all

stored recipes and settings.

Figure 3

-

5: Time State

Start

Enter Cook Time

00:20

CHAPTER 4

FAULT CODES

TurboChef Technologies, Inc. C Series

4-2

Introduction Fault Code Introduction:

The C3C oven has the ability to continually

monitor and log various fault conditions. Some

fault conditions will terminate cook cycles, while

others will not. Please refer to Table 4-1 for fault

codes:

The Codes are listed in order of hierarchy. For

example: If during cooking the oven experiences

an F1 and F2 fault, the oven will only report a F1

fault since the software will halt all actions upon

discovering the F1 fault.

In addition if a fault is detected the fault counter

will increment. If the fault is cleared the fault

counter will not de-increment.

View Fault Codes

To view the Fault Log, press the “4” and “6” keys

simultaneously in the Off State. The oven will

display all logged faults. See Figure 4-1.

Each Fault Register will log up 255 instances

before rolling back to zero. The Cook Count will

log up to 65,535 Cook Cycles. Note: In order

for the Control to log a Cook Cycle, the oven

must complete the 1

st

Event of any given recipe.

If a Recipe only has 1 Event, the oven must

complete the entire Cook Cycle in order to count

the Cook Cycle.

Note: To reset Fault Counter, Press the “0” key.

LOW MAG CURR (HV BREAKDOWN) or F3

MAG CURR – the magnetron transformer is

drawing less than 7 amps. The normal current

draw is approximately 9 amps. The current draw

is being monitored by the control board which

has a current transformer mounted on it. See

section 6

LOW COOK TEMP or F2 LOW TEMP– the

temperature set for the C3 SERIES is not being

maintained within 84

o

F (46

o

C) differential of the

Cook Chamber Setpoint. It is referenced by the

cook chamber type K thermocouple. Note: It

may also be controlled by the heat exchanger

thermocouple. See section 5

MAG OVER TMP or F5 MAG TEMP– the snap

disk on the magnetron has overheated and has

tripped. Reference Chpt. 9

BLOWER STATUS or F1 BLOWER – The

control board is not receiving the proper output

from the convection (blower) motor speed

control. Reference Chpt. 8

ELEC OVR TMP (EC TMP HIGH) or F6 EC

TEMP – The electronics compartment

thermocouple connected to the control board has

detected a temperature above 140ºF (60ºC).

Reference Chpt. 6

OVEN DOOR OPEN – (during cook cycle) the

cooking door has been opened during a cook

cycle and has not been closed properly.

DOOR MONITOR or F4 MONITOR: -- The

control board senses that the Cook Door

Monitor Switch is out-of-sequence with the

Primary and/or Secondary Door Switches.

Reference Chpt. 7

HX RISE LOW - HX (Heater) Temperature has

failed to rise 14ºF (~8ºC) F in 30 seconds.

Reference Chpt. 8

NOTE: Some error codes may be different or

no longer available or current. The following

list details all error codes created since

C3/AB, C3/C, C3CMulti and C3/AB-Multi no

exceptions.

F1 BLOWER

F2LOWTEMP

F3 MAG CURR

F4 MONITOR

F5 MAG TEMP

F6 EC TEMP

TEST C3AD_V

CC

XX

˚

F HX XX

˚

F

COOK FAULTS

0

Figure 4

-

1: Fault

Theory of Operation

4-3

Fault Code Messages Matrix

Old Error Code New Error

Code Warm-

Up While

Cooking Self-

Test Reference

Chapter

BLOWER STATUS F3 BLOWER X

X

X 8

LOW COOK TMP F2 LOW TEMP

X

8

LOW MAG CURR F3 MAG CURR

X

X 9

DOOR MONITOR F4 MONITOR

X

7

MAG OVER TMP F5 MAG TEMP

X

X 9

ELEC OVR TMP F6 EC TEMP X X X 6

HX RISE LOW Same X X 8

THERMO OPEN Same X

X

X 8

OVEN DOOR AJAR Same X

X

X 7

EC TEMP HIGH F6 EC TEMP X X X 6

CLOSE OVEN

DOOR same X X X 7

TABLE 4-1

Notes:

1. All Fault Codes listed in BOLD will terminate a Cook Cycle upon discovery.

2. Any fault occurrence during Cook mode will be logged in the Fault Counter.

3. ELEC OVR TMP/EC TEMP HIGH/F6 fault code will not terminate a cook cycle,

however it will alert the user of a possible air circulation problem (Page 6-10)

CHAPTER 5

TEST

TurboChef Technologies, Inc. C Series

5-2

Test Mode

TO ENTER TEST FUNCTION MODE

1. From the standby mode, press and hold

both BACK and ENTER keys

simultaneously.

2. The display reads:

ENTER ACCESS CODE

3. Use the NUMERIC keypad to enter the

following access code:

9- 4- 2- 8 (Older Ovens 8- 3 -1 -7)

4. Press the ENTER key.

TEST FUNCTION OPTIONS

The test screen displays the CC (cook cavity)

and HX (heat exchange) temperature at the top

of the screen.

The control displays page one of the test function

options. Press the DOWN ARROW key to display

page two of the test functions options.

To access a test function, press the

corresponding soft key repeatedly.

Blower Speed

The BLOWER key increments the blower speed

in 10% steps. When the blower speed is 100%,

the next press sets the speed to 0%.

Electronic Compartment Temperature

The ºELEC key displays the temperature inside

the electronic enclosure.

Self Test Function

The STEST key initiates a self–test function to

test all major components of the oven. Press the

L4 key once to run the Self Test. Press the BACK

key to return to the standby mode.

Heater Test

The HEATER key turns the heater on or off. If the

heaters are on, pressing the key turns the

heaters off. If the heaters are off and the

maximum (HX) temperature (900ºF) is not

exceeded, pressing the HEATER key turns the

heaters on. If the blower speed is 0, the blower

speed is set to the Idle Airflow.

Magnetron

The MGTRON key is a press and hold key to test

the magnetron. If the magnetron filaments are off

when the MGTRON key is pressed, the message

“MAG WARMING UP” is displayed. After a 3

second delay or if the filaments are already on,

“MAG ON, RF xxx” is displayed. “xxx” is the

fluctuating microwave power measured in the

wave–guide. Any time the MGTRON key is

released, the magnetron turns off. The filament

power (magnetron cooling fan and mode stirrer)

remains on for three minutes.

NOTE: The RF power indication is optional on

the C3/C SERIES model oven.

Diagnostic Display

The DIAG key turns on or off the diagnostic

display feature. This feature adds temperature

displays to the menu group screens.

While cooking, cook setting parameters are

displayed when diagnostics are enabled.

With diagnostics enabled, status indicators are

displayed on the lower left of the display. Each

indicator is a letter, which is displayed in a

positive sense when the status condition is on.

The letter is reversed when the condition is off.

Status Indicators

There are eight status indicators:

• P - Cook door primary interlock switch

• S - Cook door secondary interlock switch

• M - Cook door monitor interlock switch

• t - Magnetron over temperature switch

• h - Heater turn on command

• H - Heater current detected

• A - Blower motor speed control “run” status

• W - Magnetron current detected

Example: When the status indicator is

highlighted, for example M, the status is open or

null. In this case, the Monitor switch is in the

Open State.

Serial Number

NOTE: This should only be needed when

installing a new control. The S/N is located on the

back of the oven OR behind the bottom access

panel.

The first press of the S/N key displays the oven’s

seven-digit serial number. Use the following

procedure to enter the serial number.

1. Press the S/N key again to enter the edit

mode.

2. Right and left arrow key appear on either

side of the serial number. These arrows are

used to navigate within the text. Use the top

left SOFT KEY to move the cursor to the left.

TEST

5-3

3. Use the top right SOFT KEY to move the

cursor to the right.

4. Use the NUMERIC KEYPAD to change the

digits as follows:

A) Press the key once to enter the number.

B)

Press

the key twice to enter the first letter.

C) Press the key three times to enter the

second letter.

D) Press the key four times to enter the third

letter.

E) Press the key five times to enter the

fourth letter; if applicable.

5. Press the ENTER KEY to store the new

number.

Cook Cycle Count

The CCC key displays the cook cycle count. The

count is incremented when the cook process

completes at least the first event. The count

includes test cooks selected while in the edit

function. To reset the count, press the zero “0”

key.

PIN Number

The PIN key is used to enter a new personal

identification number (password) for accessing

the edit function. When the button is pressed the

display reads:

ENTER PIN _ _ _ _

Use the numeric keypad to enter the new PIN.

Only numbers are applicable for the PIN.

Temperature Units

The F/C key alternately selects Fahrenheit or

Celsius for temperature displays.

Cook Fault Counter

The FAULTS or FF key is used to read and reset

the oven cook fault counters. Press the 0 key to

reset the fault counter displayed. On ovens with

FF repeat pressing the FF button to view all six

fault counters. The faults include:

•

BLOWER STATUS

(blower motor speed

controller)

• LOW COOK TMP (cooking temperature)

• LOW MAG CURR (microwave current)

• LOW MAG FLUC (rf power fluctuations)*

• MAG OVER TMP (magnetron over

temperature switch)

• ELEC OVR TMP (electronics compartment

over temperature detection)

• DOOR MONITOR: (cook door monitor

switch out of sequence)*

* NOTE: The C3/C model and late model C3/AB

oven will have the LOW MAG FLUC error

message replaced by the DOOR MONITOR error

message.

Idle Airflow

The first press of the IAF key displays the

selected idle airflow. Subsequent presses of the

IAF button increment the idle airflow in 10% steps

from 20% to 50%. When the idle airflow is 50%,

the next press sets the airflow to 20%. All ovens

are factory set at 30%.

DIAG

TEST C3ADV

CC 81

O

F

HX 500

O

F

2nd Screen: Test Mode

CCC

F/C

O

ELEC

IAF

P S M

t

h

H

A

W

BLOWER

TEST C3ADV

CC 81

O

F

HX 500

O

F

1st Screen: Test Mode

FAULTS

STEST

HEATER

MGTRON

S/N

P S M

t

h

H

A

W

TurboChef Technologies, Inc. C Series

5-2

TurboChef Technologies, Inc. C Series

5-4

PASSWORDS FOR OPERATING

C3/C OVENS with C3AD

Software Version

♦ To access TEST/SERVICE functions, press

and hold BACK and ENTER keys. At the

“Enter Pin ____” prompt, key in 9428 (Older

ovens 8317) “WHAT” and press Enter.

Reference Chapter 5

♦ To access recipe EDIT, press and hold Up

and Down arrow keys. At the “Enter Pin

____” prompt, key in 9 (factory default, see

Edit PIN below) and press Enter. Reference

Chapter 3

♦ To select 208/240 VAC operation, press and

hold BACK and ENTER keys. At the “Enter

Pin ____” prompt, key in 8658 “VOLT” and

press Enter. Follow screen instructions.

When 208VAC is selected, the screen

advances to 30/35 Amp selection. When

240VAC is selected, the screen advances to

Heater Rating (208/240) selection. Follow

screen instructions. Reference Chapter 8

♦ To change the PIN for recipe Edit (9 is

factory default), press and hold BACK and

ENTER keys. At the “Enter Pin ____” prompt,

key in 3348 “EDIT” and press Enter. At the

“Please Enter New PIN ____” prompt, key in

from 1 to 4 digits and press Enter. Reference

Chapter 3

♦ To enable or disable the “Please Place Food

in Oven” screen, press and hold BACK and

ENTER keys. At the “Enter Pin ____” prompt,

key in 5623 “LOAD” and press Enter. At the

“Load Screen” prompt, press 9 “Y” to enable

the “load” screen, any other key turns off the

“load” screen.

♦ To enable or disable the “Enter Cook Time”

screen, press and hold BACK and ENTER

keys. At the “Enter Pin ____” prompt, key in

8463 “TIME” and press Enter. At the “Time

Screen” prompt, press 9 “Y” to enable the

“time” screen, any other key turns off the

“time” screen.

♦ To enable or disable the “Done, Save Time,

Cook More” screen, press and hold BACK

and ENTER keys. At the “Enter Pin ____”

prompt, key in 3663 “DONE” and press

Enter. At the “Done Screen” prompt, press 9

“Y” to enable the “done” screen, any other

key turns off the “done” screen.

Note: If you fail to timely enter the requested

keys, the function “times out” and returns to

the Oven Off screen without making any

change.

CHAPTER 6

ELECTRICAL &CONTROLS

SYSTEM

TurboChef Technologies, Inc. C Series

6-2

Electrical Component Locations:

FIGURE 6–1a Electrical Component Locations C3/AB Only

K1 K2 K3

K4 K5

1. CIRCUIT BREAKER: CB1-35 AMP

2. FUSES: (2 x 12 AMP - C3/AB;C3/C)

(25 AMP - C3/C)

3. CONVECTION HEAT HIGH LIMIT

4. 24 VDC POWER SUPPLY

5. DOOR SWICH ASSEMBLY (NOT SHOWN)

6a. K1 RELAY AND SOCKET HIGH LIMIT (C3/AB ONLY)

6b. K2 RELAY AND SOCKET FOR MONITOR CIRCUIT

6c. K3 RELAY AND SOCKET FOR MAGNETRON FILAMENT

6d. K6 RELAY AND SOCKET FOR MAGNETRON COOLING FAN

7. K5 SOLID STATE RELAY FOR HEATER

8. K4 SOLID STATE RELAY FOR MAGNETRON

T1 TRANSFORMER

9. SMT CONTROLLER BOARD

10. ELECTRICAL COMPARTMENT COOLING FAN #1

11. MAGNETRON COOLING FAN

12. STIRRER MOTOR

13. HV DIODE

14. HV CAPACITOR, 2500 VAC

15. FILAMENT TRANFORM

16. MAGNETRON HV TRANFORMER

17. MAGNETRON

18. BLOWER MOTOR SPEED CONTROLLER

19. CONVECTION MOTOR

20. N/A

21. N/A

22. THERMOSTAT, MAGNETRON (212F)

23. THERMOSTAT, CLOSE ON RISE (120F),

ELECTRICAL COMPARTMENT COOLING FAN

K6

19

3

14

4

15

16

11

17

18

1

6 2 8 7

9 3

13

10

22

23

1 PHASE EC BOX.WMF

1. Circuit Breaker: CB1-35Amp (T0322) 10. COOLING FAN (M9609)

2. Fuses: (2x12 AMP-C3/AB & C3/C) (100596) 11. MAGNETRON COOLING FAN (T0262)

(25AMP-C3/C) (100597) 12. STIRRER MOTOR (101891)

3. Convection Heat High Limit (R7603) 13. HV DIODE (100480)

4 24VDC POWER SUPPLY (M9608) 14. HV CAPACITOR, 2500 VAC (100206)

5 DOOR SWITCH ASSY (NOT SHOWN) 15. FILAMENT TRANSFORMER (102091)

6a K1 RELAY& SOCKET (T0278 &T0309) 16. MAGNETRON HV TRANSFORMER (102093)

6b K2 RELAY& SOCKET (T0278 &T0309) 17. MAGNETRON (100860)

6c K3 RELAY& SOCKET (T0278 &T0309) 18. BLOWER MOTOR SPEED CONT. (100441)

6d K6 RELAY& SOCKET (T0278 &T0309) 19. CONVECTION MOTOR ASSY. (C0299)

7 K5 SOLID STATE RELAY FOR HEATER (101285) 20. N/A

8 K4 SOLID STATE RELAY FOR MAGNETRON (101285) 21. N/A

9 SMT CONTROLLER BOARD (T0265) 22. THERMOSTAT, MAGNETRON (102070)

23. THERMOSTAT, ELECTRICAL

COMPARTMENT (102085)

Electrical Compartment and Controls

6-3

Electrical Component Locations:

FIGURE 6–1b Electrical Component Locations C3/C Only

K1 K2 K3

K4 K5

1. CIRCUIT BREAKER: CB1-35 AMP

2. FUSES: (2 x 12 AMP - C3/AB;C3/C)

(25 AMP - C3/C)

3. CONVECTION HEAT HIGH LIMIT

4. 24 VDC POWER SUPPLY

5. DOOR SWICH ASSEMBLY (NOT SHOWN)

6a. K1 RELAY AND SOCKET HIGH LIMIT (C3/AB ONLY)

6b. K2 RELAY AND SOCKET FOR MONITOR CIRCUIT

6c. K3 RELAY AND SOCKET FOR MAGNETRON FILAMENT

6d. K6 RELAY AND SOCKET FOR MAGNETRON COOLING FAN

7. K5 SOLID STATE RELAY FOR HEATER

8. K4 SOLID STATE RELAY FOR MAGNETRON

T1 TRANSFORMER

9. SMT CONTROLLER BOARD

10. ELECTRICAL COMPARTMENT COOLING FAN #1

11. MAGNETRON COOLING FAN

12. STIRRER MOTOR

13. HV DIODE

14. HV CAPACITOR, 2500 VAC

15. FILAMENT TRANFORM

16. MAGNETRON HV TRANFORMER

17. MAGNETRON

18. BLOWER MOTOR SPEED CONTROLLER

19. CONVECTION MOTOR

20. N/A

21. N/A

22. THERMOSTAT, MAGNETRON (212F)

23. THERMOSTAT, CLOSE ON RISE (120F),

ELECTRICAL COMPARTMENT COOLING FAN

K6

19

14

4

15 16

11

17

18

2

1 6 8 7

9 3

13

10

22

23

1 PHASE C3/C EC

BOX.WMF

1. Circuit Breaker: CB1-35Amp with trip coil (T0322) 10. COOLING FAN (100519)

2. Fuses: (2x12 AMP-C3/AB & C3/C) (100596) 11. MAGNETRON COOLING FAN (T0262)

(25AMP-C3/C) (100597) 12. STIRRER MOTOR (101891)

3. Convection Heat High Limit (R7603) 13. HV DIODE (100480)

4 24VDC POWER SUPPLY (M9608) 14. HV CAPACITOR, 2500 VAC (100206)

5 (NOT SHOWN) 15. FILAMENT TRANSFORMER (102091)

6a K1 RELAY& SOCKET (T0278 &T0309) 16. MAGNETRON HV TRANSFORMER (102093)

6b K2 RELAY& SOCKET (T0278 &T0309) 17. MAGNETRON (100860)

6c K3 RELAY& SOCKET (T0278 &T0309) 18. BLOWER MOTOR SPEED CONT. (100441)

6d K6 RELAY& SOCKET (T0278 &T0309) 19. CONVECTION MOTOR ASSY. (T0299)

7 K5 SOLID STATE RELAY FOR HEATER (101285) 20. N/A

8 K4 SOLID STATE RELAY FOR MAGNETRON (101285) 21. N/A

9 SMT CONTROLLER BOARD (T0265) 22. THERMOSTAT, MAGNETRON (102070)

23. THERMOSTAT, ELECTRICAL

COMPARTMENT (102085)

Part Number 100441-Reliance Blower Motor Speed Controller will be replaced by 100444-Delta Controller & FSB10034.doc

EMI FILTER (T0286) NOT SHOWN

TurboChef Technologies, Inc. C Series

6-4

ELECTRICAL COMPONENT LOCATIONS: “C3/MULTI” OVENS ONLY

FIGURE 6–1C Electrical Component Locations C3Multi Only

1. Circuit Breaker: CB1-15A & CB2-15A&CB3-15A (103170) 10. COOLING FAN (M9609)

2. 12 A-FUSE ATM-12 (100596) 11. MAGNETRON COOLING FAN (T0262)

12. STIRRER MOTOR (101891)

3. CONVECTION HEAT HIGH LIMIT (R7603) 13. HV DIODE (100480)

4. 24VDC POWER SUPPLY (M9608) 14. HV CAPACITOR, 2500 VAC (100206)

5. DISTRIBUTION BLOCK (N/A) 15. FILAMENT TRANSFORMER (102091)

6a. K2 RELAY& SOCKET (T0278 &T0309) 16. MAGNETRON HV TRANSFORMER (102093)

6b. K3 RELAY& SOCKET (T0278 &T0309) 17. MAGNETRON (100860)

6c. K6 RELAY& SOCKET (T0278 &T0309) 18. BLOWER MOTOR SPEED CONT. (100441)

19. CONVECTION MOTOR ASSY. (C0299)

7. K5 SOLID STATE RELAY FOR HEATER (101285) 20. TRIP COIL BREAKER (103171)

8. K4 SOLID STATE RELAY FOR MAGNETRON (101285) 21. K7 SOLID STATE RELAY HEATER (101285)

9. SMT CONTROLLER BOARD (T0265) 22. THERMOSTAT, MAGNETRON (102070)

23. THERMOSTAT, ELECTRICAL

COMPARTMENT (102085)

Notes:

Part Number 100441-Reliance Blower Motor Speed Controller will be replaced by 100444-Delta Controller & FSB10034.doc

EMI FILTER (100542) NOT SHOWN

Electrical Compartment and Controls

6-5

ELECTRICAL COMPONENT LOCATIONS: “C3/C MULTI” OVENS ONLY

FIGURE 6–1C Electrical Component Locations C3/CMulti Only

1. Circuit Breaker: CB1-15A & CB2-15A&CB3-15A (103170) 10. COOLING FAN (100519)

2. 12 A-FUSE ATM-12 (100596) 11. MAGNETRON COOLING FAN (T0262)

12. STIRRER MOTOR (101891)

3. CONVECTION HIGH LIMIT (R7603) 13. HV DIODE (100480)

4. 24VDC POWER SUPPLY (M9608) 14. HV CAPACITOR, 2500 VAC (100206)

5. DISTRIBUTION BLOCK (N/A) 15. FILAMENT TRANSFORMER (102091)

6a. K1 RELAY& SOCKET (T0278 &T0309) 16. MAGNETRON HV TRANSFORMER (102093)

6b. K2 RELAY& SOCKET (T0278 &T0309) 17. MAGNETRON (100860)

6c. K3 RELAY& SOCKET (T0278 &T0309) *18. BLOWER MOTOR SPEED CONT. (100441)

19. CONVECTION MOTOR ASSY. (C0299)

7. K5 SOLID STATE RELAY FOR HEATER (101285) 20. TRIP COIL BREAKER (103171)

8. K4 SOLID STATE RELAY FOR MAGNETRON (101285) 21. K6 SOLID STATE RELAY HEATER (101285)

9. SMT CONTROLLER BOARD (T0265) 22. THERMOSTAT, MAGNETRON (102070)

23. THERMOSTAT, ELECTRICAL

COMPARTMENT (102085)

Notes:

Part Number 100441-Reliance Blower Motor Speed Controller will be replaced by 100444-Delta Controller & FSB10034.doc

EMI FILTER (100542) NOT SHOWN

TurboChef Technologies, Inc. C Series

6-6

ELECTRICAL COMPONENTS PARTS LIST SUMMARY

Item # Part

Number Description Used on Model(s)

1

T0322

Circuit Breaker CB1

-

35A w/Trip Coil

C3/AB & C3/C

2

100596

12 Amp Aux Fuse

All

2b

100597

25 Amp Heater Fuse

C3/C

2c

100591

Fuse Holders

All

3

R7603

Convection High Limit

C3/AB & C3/C

3

102016

Convection High Limit

C3Multi & C3/CMulti

4 M9608 24 VDC Power Supply All

6 T0278 &

T0309

Relay (24 VDC Coil/240 VAC Output) &

Socket

All

7

101285

Solid State Relay for Heater

All

8

101285

Solid Sate Relay for Magnetron

All

9

T0265

SMT Controller

All

10 M9609 Electrical Compartment Cooling Fan C3/AB & C3Multi

10 100519 EBM Electrical Compartment Cooling Fan C3/C & C3/CMulti

11 T0262 Magnetron Cooling Fan All

12

101891

Stirrer Motor

All

13

100480

HV Diode

All

14 100206 HV, Capacitor, 2500 V All

15

102091

Filament Transformer

All

16

102093

Mag

netron Transformer T1

All

17 100860 Magnetron All

18

100441

Blower Motor Speed Controller

All

ELECTRICAL COMPONENTS PARTS LIST (CON’T): All C Series Ovens-

Electrical Compartment and Controls

6-7

(See Figures 4-1a/b)

Item # Part Number Description Used on Model(s)

19 C0299 Convection Motor Assy All

20 103170 Circuit Breakers CB2 & CB3 15 Amp C3Multi & C3/CMulti

21 101285 K7 Solid State Relay C3Multi & C3/CMulti

22 102070 Thermostat, Magnetron (212F) All

23 102085 Thermostat, EC Box All

NS 100542 EMI Filters (not shown) C3Multi & C3/CMulti

NS T0286 EMI Filter C3/AB & C3/C

TurboChef Technologies, Inc. C Series

6-8

CONTROL PANEL COMPONENT DETAIL

CONTROL PANEL PARTS LIST (see above)

ITEM

Part

Number

Description Used on Model(s)

1 T0239 CONTROL PANEL (SHEET METAL) C3/AB & C3/MULTI

2 C0239 CONTROL PANEL (SHEET METAL) C3/C & C3/CMULTI

3 NA VFD DISPLAY CONNECTOR All

4 T0264 KEYPAD All

5 T0374 CONTROL MOUNTING PLATE C3/AB & C3MULTI

5 C0374 CONTROL MOUNTING PLATE C3/C & C3/CMULTI

6 T0238 VFD DISPLAY All

CONTROL PANEL ASSEMBLY AND COMPONENT

1. ASSEMBLED CONTROL PANEL

2. KEYPAD RIBBON CABLE

3. DISPLAY CONNECTOR

1

2

3

4

5

6

CONTROL PANEL ASSEMBLY AND COMPONENT

4. KEYPAD

5. CONTROL MOUNTING BRACKET

6. DISPLAY

Electrical Compartment and Controls

6-9

CONTROL SYSTEM TROUBLESHOOTING

Issue: Resolutions:

1: No Display (Blank) 1. Verify power 208 VAC or 240 VAC is going to oven. If not correct

voltage supply.

2. Does the control beep when any Key on the keypad is pressed?

a. If no, check power going to the 24VDC power supply. Supply

must have 208 or 240 VAC across L and N terminals.

i. No Voltage: Change F1 and F2 Fuses.

ii. Voltage OK: verify output of Power Supply is 24 VDC.

1. No Output: Disconnect Rear Cooling Fan from

Power Supply and unplug unit from wall

receptacle. Then reconnect oven

a. If oven screen comes up then re-connect rear

cooling fan back into circuit and short cooling fan

thermostat. If unit display shuts down then replace

Rear Cooling Fan.

b. If oven screen comes up even with the rear cooling

fan and thermostat shorted across, then place oven

in TEST mode by pressing the BACK + ENTER

simultaneously and keying 9-4-2-8 then Press the

MGTRON key one time and if the display shuts down

check for Loose Wire Connection or Magnetron

Cooling Fan (shorted).

2. Output is 24VDC. Verify I/O Board has 24 VDC by

checking the voltage on the D6 diode (striped end) to

Chassis. Reference Chapter 10 for details

a. No voltage: Check wires from Power Supply

to I/O Board.

b. Voltage is 24VDC, but 5VDC is not present on

the I/O Boards J3 connector: Change I/O Board.

Reference Chapter 10 for details.

b. If Yes: Check all Connections between I/O board and Display.

Correct any loose connections. If all connections OK and 5

VDC is present on J3 connector, but still no Display: Change

Display.

2. No Keypad Input 1. Check Keypad Ribbon Cable going to I/O Board.

a. Cable and Connection Bad: Replace Keypad.

b. Cable and Connection OK: Replace Keypad.

3.

a. ELEC OVR TMP;

“or” b. EC TEMP HIGH;

“or” c. F6 EC TEMP

1. Check operation of rear cooling fan. Reference Schematic in Chapter

10.

2. Check cooling air paths are not clogged or obstructed with grease

residue. (front panel, rear fan grill, left and right side covers)

3. Verify there are no high heat or grease producing piece of

equipment, such as a range top, open grill, fryer adjacent to the

oven right side.

TurboChef Technologies, Inc. C Series

6-10

Defective Current Transformer on Computer Board

SMT Board (T0265) Background:

During the operation of the microwave system, the control board monitors current in the

microwave circuit by means of a current transformer mounted on the controller board.

The current transformer must see at least 6 amps in order for the microwave to energize.

If it fails to register 6 amps, the I/O board may be defective and the oven will prematurely

turn OFF the magnetron and display a "LOW MAG CURR/F3 MAG CURR" message.

Figure 6-2: SMT Board (T0265)

Checking the controller current transformer

Step 1: Place oven in TEST mode. Press BACK key until the oven screen displays " OVEN OFF" then

Press and hold the BACK and ENTER keys simultaneously and then key in PIN # 9-4-2-8 (access code)

then ENTER. This will allow you to enter into the test mode to manually energize the magnetron.

Step 2: Place a load inside the oven (about 275ml of water or an approximate amount inside a coffee cup).

Step 3: Clamp an ammeter on K4-1 wire (same wire going thru CT1 on controller board), and energize the

magnetron by pressing and holding the MGTRON key for about 10 seconds. If your meter measures

current (approximately 9 Amps+/- 2) and the W indicator at the bottom of the screen does not un-highlight

while energizing the magnetron, replace the computer board. If the measured current is between 6 and 7

Amps then double loop the wire thru CT1 twice, then perform a self test. If the self test fails then replace

board.

CT1

CHAPTER 7

COOK DOOR ASSEMBLY

TurboChef Technologies, Inc. C Series

7-2

DOOR SWITCHES AND CIRCUIT

BREAKERDOOR SWITCHES

The C series ovens have 3 door switches as

mandated by law. The C3/AB and C3Multi have

one door switch located on the left hand side

(CDS) and is called the secondary switch. The

other two switches are located on the right hand

side (CDP & CDM). One is called the primary

switch (CDP) and the other is called the monitor

switch (CDM). The C3/C and C3/CMulti switch

orientation is reversed, i.e., the monitor (CDM)

and the primary switch (CDP) are located on the

left side of the oven. The secondary (CDS) is

located on the right side of the oven.

The monitor switch must close before the primary

and secondary switches close (as the door is

closed) or the circuit breaker will trip. If the

primary or secondary switch is defective and not

closing the screen will display a door open error

message. To determine what sequence the doors

are closing in, you will need to access the Test

mode and activate the Test mode. By doing so,

you will activate the status indicators at the lower

left bottom of the display. Slowly close the door

once you have activated the Test mode and

observe the status indicators. As you close the

door the M indicator must change from a

highlighted state followed by the S indicator and

final the P indicator. As you open the door, the

sequence must reverse, i.e., P, S and then M. If

this sequence is not correct, YOU MUST

READJUST THE SWITCHES. See section 7-6.

"WHY DOES THE CIRCUIT BREAKER

TRIPPED IF THE SWITCHES ARE

MISALIGNED?

"In addition to the High Voltage circuit, it is

imperative to understand how the monitor circuit

operates. The Monitor Circuit is a failsafe circuit

that is designed to protect the operator if both the

Primary and Secondary Interlock Switches fail to

operate normally.

The Monitor Circuit consists of the Primary

Interlock Switch, Secondary Interlock Switch,

Monitor Safety Switch, Monitor Relay and Trip

Coil. When the Cook Door closes during normal

operation, the Monitor and Secondary/ Primary

Switches close in this order. When all switches

are closed, the microwave system is allowed to

operate. If during normal operation, either

Interlock Switch opens, such as when the Cook

Door opens, the Control system will turn OFF the

Microwaves; however, if the Monitor Switch

opens before both the Primary and Secondary

Interlock switches, i.e., abnormal operation, the

Monitor switch will de-energize the Monitor

Relay. When this occurs, a dead short is placed

across L1 and L2. The short then trips the coil on

the circuit breaker, which permanently interrupts

power to the Microwave system, thus terminating

a cook cycle if the oven was cooking and

preventing the heaters from energizing. This then

requires a service call from a qualified technician

to assure that the monitor circuit is properly

repaired to prevent excessive microwave

radiation.

Cook Door

7-3

CIRCUIT BREAKER TRIP CHART

Component Possible Cause/Circuit Information

Magnetron transformer The

magnetron transformer will draw approximately 9 amps when

functioning properly. Check winding resistances (See Page 9-8).

A 3 Amp draw indicates the diode is defective.

Solid state contactor for

Magnetron (K4) The coil operates on 24v dc. Solid state re

lays tend to fail closed.

Check with VOM meter. Reference Chapter 9 for troubleshooting.

Hot air heater element Use VOM meter.

240V element is 12 ohms / current is 20amps.

208V element is 9 ohms / current is 23 amps.

C3/C oven only: Check the 25 Amp fuse inline with the CB1 and the

heater. Reference Chapter 8

Solid state contactor (K5)

(K7) for hot air element

(See above for correct current draw.) The coil operates on 24v dc.

Solid state relays tend to Fail closed. Check with VOM meter.

High limit & K1 relay

(C3/AB and C3/C only)

High limit tripped (670°F/350°

C). Reset high limit switch with

screwdriver. Reference Page 8-4 for details

Door switch closure Check Switches with VOM meter. Reference Page 7-2 & Figure 7-

1

above.

Diode The magnetron transf

ormer will draw excessive current (greater than

15 amps), meaning the diode is shorted to ground. Reference Chpt.9

Figure 7-1

Table 7-1

TurboChef Technologies, Inc. C Series

7-4

DOOR SWITCH ADJUSTMENT

Tools Required:

• # 1 Phillips head screw driver

• # 2 Phillips head screw driver

• 3/8” socket wrench (1/4” drive)

• Needle nose pliers

• Large flat blade screw driver

GOAL

The goal of this adjustment procedure is to have the

Monitor, Secondary and Primary switches close in

that order as the oven door is closed. The switches

must open in the reverse order as the door is

opened, that is, the Primary, Secondary and then

the Monitor open as the door opens. This procedure

is written to insure proper oven operation and

compliance with Federal regulations.

ADJUSTMENT

1) Remove the left and right side access covers

(body sides).

2) Remove the lower louvered front access panel.

3) Remove oven top. It is secured in place with

four 3/8” Nylock nuts to the upper frame sides.

4) Remove screw located on bottom of left side

corner trim (front of oven) and carefully bend

the trim out of the way to allow access to left

side switch assembly and associated hardware.

(See Fig. 7-6 a & 7-6b ).

RIGHT SIDE OF OVEN:

NOTE: The C3/C and C3/Cmulti oven switch

arrangement is different from the C3/AB and the

C3Multi. The C3/AB and C3/Multi monitor and

primary switches are on the right-hand side of the

oven and the secondary switch is on the left-hand

side of the oven. Regardless of their position on

the oven, the procedure for adjusting the switches

is the same for both types of ovens. See Figure 7-

3.

5. Remove magnetron plenum assembly

(secured by one PPH screw at rear of

oven). The plenum assembly is located on

the bottom right side of the oven.

6. On models C3/AB and C3Multi it may be

necessary to remove the 35 AMP circuit

breaker in order to gain access to the limit

switches. If this is necessary, label each

wire prior to removing it from the Circuit

Breaker in the following step.

7. Carefully pull down two tabs on the bottom

of the circuit breaker and pull the breaker

up and out to remove it from the din rail

allowing access to the switch brackets on

the right side of the oven

Note: Refer to page 7-11, DOOR ADJUSTMENT,

along with this section if the cam follower bracket

assembly has to be adjusted and tightened. This is

very important to prevent any potential damage

to the door hardware from interference and to

assure proper door closing tension.

8. Check that the trailing arm is properly

engaged in cam follower bracket assembly

and trailing arm guide blocks. When the

door is closed the trailing arms should sit as

shown. See Figure 7-6a,b.

9. If the trailing arm is not properly engaged in

cam follower bracket assembly or if it is

hitting the assembly loosen the two 3/8”

nuts securing the cam follower assembly.

10. Cam follower bracket assembly has

clearance at the bottom to move. Pick up

on trailing arm to engage it in trailing arm

guide blocks and move cam follower

bracket assembly up into notch on trailing

arm. See Figure 7-4. Tighten the two 3/8”

nuts when adjustment is correct.

11. When properly aligned, the door should

have no play when pushed in the closed

position and when opened the first

movement of the trailing arm should be up

and over the cam follower bracket

assembly (both sides of the oven) – See

Fig.7-4. Additionally, when the door is

closed, the trailing arms should “snap”

down into position. To test this, gentle pick

up one of the trailing arms approximately ¾

inch and release it. The trailing arm should

“snap” back down in to the same position

each time. If it hangs or does not return to

the exact position each time readjust the

cam roller assembly.

12. If it is determine that a proper adjustment

can not be made, it may be necessary to

reposition the bottom hinge on the door. To

do this, loosen item 11 (see Figure 7-6) on

both sides of the oven. With all screws

loose, close the door and push in and down

on the door. While doing so, tighten all

screws on the hinge. Now repeat steps 7-

10.

LIMIT SWITCH ADJUSTMENT: PRIMARY AND

MONITOR

Cook Door

7-5

13. Actuator tab should be positioned as shown

in Figure 7-5. It should be parallel to the

primary switch lever. Adjust and bend

(needle nose pliers) actuator tab as

necessary.

14. When the door is closed and the actuator

tab is in contact with the primary and

monitor switches the switches should both

be closed. The actuator tab should be in

contact with the switch paddles such that

when the switches are closed there is about

0.020” of clearance between the switch

paddles and the switch bodies. Also, the

actuator tab should be at or close to

horizontal and be positioned approximately

1/4” from the end of the monitor switch

actuator tab. Adjust the interlock switch

brackets by loosening the screws as

necessary. See Figure 7-5.

15. Once the switches and actuator are

properly adjusted, as the door is opened

the primary switch should disengage before

the monitor switch.

LIMIT SWITCH ADJUSTMENT: SECONDARY

16. Refer to steps 8, 9, 10, and 11 this page.

The trailing arm must be properly engaged

in the cam follower bracket assembly and

the trailing arm guide blocks.

17. Again, the actuator tab should be

positioned as shown in detail of Figure 7-5.

Adjust and bend (needle nose pliers)

actuator tab as necessary.

18. When the door is closed, the actuator tab is

in contact with the secondary switch paddle

and the switch should be closed. There

should be approximately 0.020” of

clearance between the switch paddle and

the switch body. Adjust the limit switch

bracket by loosening the screws as

necessary.

FINAL TESTING OF DOOR SWITCH

ADJUSTMENT:

19. After the door switch assemblies have been

properly aligned and adjusted on both

sides, confirm that with the door closed that

all three switches contacts are closed.

20. As the door is opened slowly confirm that

all three switches operate in the correct

sequence, i.e. as the door is opened the

switches open in the order of primary,

secondary, and then monitor .

21. As the door is slowly closed confirm the

switches close in the opposite order from

above.

22. If the sequencing is not correct, readjust

switch brackets and or associated

hardware until all criteria are met.

SWITCH TEST AT TEMPERATURE:

23. Reinstall main circuit breaker on din rail and

reattach wiring to bottom of circuit breaker.

24. Reattach left side trim piece and magnetron

plenum assembly.

25. Refit top cover and left and right side

covers.

26. Plug the oven in and set the temperature to

525 F and allow the oven to come up to

temperature and remain at temperature for

15 minutes.

27. Refer to Chapter 5, and put the oven into

test mode. At the bottom left of the screen

are the letters P, S, and M. As the oven

door is slowly opened, the background of

the letters will light up indicating that the

switches have opened.

28. Slowly open and close the door to confirm

the proper sequence of the switches, P, S,

M and M, S, P respectively.

29. If the sequencing is not correct, remove the

left and right side covers and adjust the

switch brackets as necessary and retest the

oven.

30. If the sequencing is correct, while in the test

mode refer to section 9-2 and perform the

microwave radiation leakage tests.

TurboChef Technologies, Inc. C Series

7-8

Figure 7-3 Interlock Placement Differences C3/AB vs. C3/C

Cook Door

7-7

Figure 7-4 Trailing Arm and Cam Motion

TRAILING ARM AND CAM MOTION

1. CAM FOLLOWER ROLLER

2. TRAILING ARM

NOTES:

3. IN DOOR CLOSED POSITION, THE TRAILING ARM SHOULD SEAT

AS SHOWN ON THE CAM. NOTE: BOTH THE LEFT AND RIGHT

SIDES SHOULD BE ADJUSTED SUCH EACH SIDE SEATS AS SHOWN.

4. AS THE DOOR OPENS, THE TRAILING ARM MUST CONTACT CAM

DURING FULL MOTION OF THE DOOR.

2 4

1

3

Cook Door

7-9

Figure 7-58: Interlock Switch Adjustment

TurboChef Technologies, Inc. C Series

7-10

DOOR REMOVAL AND

REPLACEMENT

Tools Required:

• 12” long #2 Phillips screw driver

• 3/8” hex driver

• 3/8” socket with 1/4” ratchet wrench

• Set of feeler gages

• Large flat blade screw driver

DOOR REMOVAL

1) Remove the side and top panels, top and

bottom molding, control panel, and left

perimeter trim piece.

2) Remove the interlock actuator tabs (#3) and

front guide block assembly (#14) from both

sides of the oven. (See FIGURE 7-6.)

NOTE: The guide block assembly may or

may not contain guide block support shims.

Guide block assemblies should be re–installed in

the location they were removed from (i.e. right

guide block assembly re–installed on right side) to

prevent potential trailing arm binding.

3) Close the oven door and disconnect the

springs (#8 & #15) from both trailing arms

(#2).

4) Loosen but do not remove the nuts that hold

the cam follower assembly (#12) in position,

then rotate both assemblies down to vertical

orientation.

5) Remove the door:

a) Remove the four 10–32 (M5) UNF

Phillips screws (#11) from the door hinge

bar mounting brackets (#7) on both sides

of the oven.

b) Pull the door away from the oven, bottom

first, to slide the hinge bars (#14) out of

their slots. Use caution in removing the

door to avoid bending the hinge bars. If

the bars bind in their slots, gently wiggle

the door to free them.

c) Remove the door, guiding the hooked

portion of the trailing arm over the cam

follower rollers (#13).

DOOR INSTALLATION

6) Rotate cam follower assembly (#12) down to

vertical position to permit the trailing arms

(#2) to pass over the cam follower roller

(#11) in step 2.

7) Assemble the door to the oven:

a) Slide the trailing arms through the upper

slots and over the rollers.

b) Slide the hinge bars (not shown) through

the lower slots. Use caution in installing

the door to avoid bending the hinge bars.

If the bars bind in their slots, gently

wiggle the door to free them.

c) Attach the bars to the door hinge bar

mounting brackets (#13) with four 10–32

(M5) UNF screws (#11) on each side

(finger tight). Apply 242 thread–locker to

screw threads prior to installation.

d) Close the door and apply even pressure

(approximately 15 to 20 pounds) to the

face of the door to squarely seat the door

shunt on the oven face. Continue to

apply this force while tightening the four

screws on each side (two people are

recommended).

8) Install the springs (#8) on each side between

the trailing arm and spring brackets – See

door switch adjustment section beginning on

page 7-6. Any interference between any

other component or wiring and the springs or

trailing arms must be corrected before

proceeding.

9) Install the front trailing arm guide blocks

(#14):

a) Assemble (per side) one spacer block,

two guide blocks, two spacers, and two

screws with lock–washers.

NOTE: The guide block assembly may or may

not contain guide block support shims. Guide

block assemblies should be re–installed in the

location they were removed from (i.e. right guide

block assembly re–installed on right side) to

prevent potential trailing arm binding

b) Install one guide block assembly over

each trailing arm and tighten screws.

10) Install the interlock actuator tabs (#3):

a) Open the door.

b) Attach the interlock actuator tabs to the

trailing arms with two 6–32 UNF (M3)

screws, and lock and flat washers on

each side.

NOTE: As you face the oven front both actuator

tabs are mounted on the inside of the trailing

arms.

WARNING!!

At the first closing of the door verify that the

actuator tabs do not hit and bend on the

trailing arm guides block assemblies (#1 and

#14). Verify placement of the actuator tabs to

insure that the interlock switch levers do not

Cook Door

7-11

bottom out on the switch body (#6). If they do,

open the door and realign switch brackets

and or actuator tabs again checking for

interference with the guide as the door is

closed.

DOOR ADJUSTMENT

1) Adjust cam follower assembly (#12) to

tension the trailing arms (#2) to apply closing

pressure:

a) Close the door.

b) Rotate the cam follower assembly so that

the top of the trailing arm engages the

rear guide (#1) 0.125 inch (+0.125 -

0.031) above the top of the chamfered

lead in.

c) The cam follower assembly roller (#11)

should be located on the ramp portion of

the trailing arm with 0.020” to 0.050” gap

between the top of the roller and the

bottom of the trailing arm radius.

d) Tighten the cam follower bracket nuts.

2) Adjust the interlock switch brackets (#4) and

actuator tabs (#3):

NOTE: Refer to page 7-5 for the final door

switch adjustment. This adjustment is

completed after all door adjustment

steps have been completed.

3) Adjust the door pivot position for best

alignment by inspecting for the following

conditions:

a) Ideally, the microwave sealing planes

(the portions of the oven face and door

shunt that overlap each other) should

touch, since as the gap between the

sealing planes increases, it becomes

more likely that the microwave leakage

will increase. However, because of

manufacturing tolerances, the microwave

sealing planes of the door shunt and the

oven flange are not perfectly flat. The

best door alignment minimizes the gaps

between the sealing planes both top and

bottom.

b) If the hinge bars have been pushed too

far into their brackets (#13), the lower

edge of the sealing planes will be tight

and there will be an excessive gap

between the sealing planes along the top

edge. In this position, with the top

molding removed, most of the hex head

of the shunt screws will be seen.

c) If the hinge bars have not been pushed

far enough into their brackets the upper

edge of the sealing planes will be tight

and an excessive gap will occur between

the sealing planes along the bottom

edge. This could permit excessive

microwave leakage along the bottom

edge.

NOTE: To correct B or C: Loosen the door

hinge bar screws (#11) on both sides.

Close the door and apply even

pressure (approximately 15 to 20

pounds) to both sides of the door to

squarely seat the door shunt on the

oven face. Continue to apply this

force while tightening the four screws

on each side (two people are

recommended).

d) By design there is a 0.030” clearance

between the Phillips head screws

securing the plastic shunt cover and the

oven flange on the C3/AB and C3Multi.

The C3/C and C3/CMulti gap should be

0.060” (1.50 mm). Verify that one or

more of these screws does not contact

the oven flange and increase the gap

between the sealing planes. This

condition may be indicated by the head

of the screw(s) marking the oven flange.

If this is the case, the door may be

warped or the shunt may not be flat.

Adjust, repair, or replace the door so that

when the door shunt is seated squarely

none of the Phillips head screws contact

he oven flange.

e) Repeat adjustment steps 1 and 2 as

required after completing door alignment.

4) Adjust the interlock switches per procedure

beginning on page 7-6.

5) After adjusting the interlock switches the

oven must be checked for microwave

leakage. Refer to the page 9-2 for

instructions and acceptable limits.

TurboChef Technologies, Inc. C Series

7-12

FIGURE 7 – 6a C3/C & C3/Cmulti (Left Side)

Cook Door

7-13

DOOR REMOVAL AND REPLACEMENT PARTS LIST (LEFT SIDE):

See Figure 4-3 & 4-7a.

ITEM

Part

Number

Description Used on Model(s)

1 T0538 TRAILING ARM GUIDE C3/AB, C3MULTI

1 C0538 TRAILING ARM GUIDE C3/C, C3/CMULTI

2 T0550 TRAILING ARM, RH C3/AB, C3MULTI

2 C0550 TRAILING ARM, RH C3/C, C3/CMULTI

3 T0529 INTERLOCK ACTUATOR BRACKET

C3/AB, C3MULTI

3 C0529-2 INTERLOCK ACTUATOR BRACKET C3/C, C3/CMULTI

4 T0534 INTERLOCK SWITCH BRACKET C3/AB, C3MULTI

4 C0534 INTERLOCK SWITCH BRACKET C3/C, C3/CMULTI

5 T0330 INTERLOCK SECONDARY SWITCH

C3/AB, C3MULTI

5 C0330 INTERLOCK MONITOR SWITCH C3/C, C3/CMULTI

6 C0330 INTERLOCK PRIMARY SWITCH C3/C, C3/CMULTI

7 T0516 DOOR HINGE BAR MOUNTING

BRACKET

C3/AB, C3MULTI

7 C0516 DOOR HINGE BAR MOUNTING

BRACKET

C3/C, C3/CMULTI

8 T0542 SPRING, TRAILING ARM C3/AB, C3MULTI

8 C0542 SPRING, TRAILING ARM C3/C, C3/CMULTI

9 T0535 DOOR SPRING BRACKET C3/AB, C3MULTI

9 C0535 DOOR SPRING BRACKET C3/C, C3/CMULTI

10 TC3-0186 BRACKET, SPRING, LEFT C3/AB, C3MULTI

10 C0186 BRACKET, SPRING, LEFT C3/C, C3/CMULTI

11 101450 10-32 X 3/8 PPH CRES C3/AB, C3MULTI

11 TBD M5 X 10 mm PPH, CRES C3/C, C3/CMULTI

TurboChef Technologies, Inc. C Series

7-15

DOOR REMOVAL AND REPLACEMENT PARTS LIST (LEFT SIDE) CON’T

See Figure 4-7a.

ITEM

Part

Number

Description Used on Model(s)

12 T0560 CAM FOLLOWER ASSY C3/AB, C3MULTI

12 C0560 CAM FOLLOWER ASSY C3/C, C3/CMULTI

13 T0541 CAM FOLLOWER ROLLER C3/AB, C3MULTI

13 C0541 CAM FOLLOWER ROLLER C3/C, C3/CMULTI

14 T0548 GUIDE BLOCK C3/AB, C3MULTI

14 C0548 GUIDE BLOCK C3/C, C3/CMULTI

15 TC3-0179 HELPER SPRING C3/AB, C3MULTI

15 C0708 HELPER SPRING C3/C, C3/CMULTI

Cook Door

7-16

FIGURE 7 – 6b Door Removal and Replacement (Right Side)

K6K3K2

K6

K4 K5

DOOR REMOVAL AND REPLACEMENT (RIGHT SIDE)

1. TRAILING ARM

2. INTERLOCK ACTUATOR BRACKET

3. INTERLOCK SECONDARY SWITCH

4. INTERLOCK SWITCH BRACKET

5. SPRING, TRAILING ARM

6. CAM FOLLOWER ROLLER

7. CAM FOLLOWER ASSY

8. HELPER SPRING

1

2

4

3

6

7

8

TurboChef Technologies, Inc. C Series

7-17

DOOR REMOVAL AND REPLACEMENT PARTS LIST (RIGHT SIDE):

See Figure 4-7b

ITEM

Part

Number

Description Used on Model(s)

1

T0550

TRAILING ARM, RH

C3/AB, C3MULTI

1

C0550

TRAILING ARM, RH

C3/C, C3/CMULTI

2

T0529

INTERLOCK ACTUATOR BRACKET

C3/AB, C3MULTI

2

C0529

-

1

INTERLOCK ACTUATOR BRACKET

C3/C, C3/CMULTI

3

T0330

INTERLOCK MONITOR SWITCH

C3/AB, C3MULTI

3

T03

30

INTERLOCK PRIMARY SWITCH

C3/AB, C3MULTI

3

T0330

INTERLOCK SECONDARY SWITCH

C3/C, C3/CMULTI

4

C0534

INTERLOCK SWITCH BRACKET

C3/C, C3/CMULTI

4 T0534 INTERLOCK MONITOR SWITCH

BRACKET

C3/AB, C3MULTI

4 T0534 INTERLOCK PRIMARY SWITCH

BRACKET

C3/AB, C3MULTI

5

T0542

SPRING, TRAILING ARM

C3/AB, C3MULTI

5

C0542

SPRING, TRAILING ARM

C3/C, C3/CMULTI

6

T0514

CAM FOLLOWER ASSY

C3/AB, C3MULTI

6

C0514

CAM FOLLOWER ASSY

C3/C, C3/CMULTI

7

T0541

CAM FOLLOWER ROLLER

C3/AB, C3MULTI

7

C0541

CAM FOLLOWER ROLLE

R

C3/C, C3/CMULTI

8

TC3

-

0179

HELPER SPRING

C3/AB, C3MULTI

8

C0708

HELPER SPRING

C3/C, C3/CMULTI

N/S

T0548

GUIDE BLOCK

C3/AB, C3MULTI

N/S

C0548

GUIDE BLOCK

C3/C, C3/CMULTI

N/S

T0538

TRAILING ARM GUIDE

C3/AB, C3MULTI

N/S C0538 TRAILING ARM GUIDE C3/C, C3/CMULTI

Cook Door

7-18

Figure 7-8: C3/C and C3/CMulti Door Assembly

17. WASHER, LOCK M6 SS

18. BOLT, M6 X 20 MM SS

19. ASSY, ARM. LH

20. ASSY, PIN

21. WASHER, NYLON

22. ASSY BEARING BLOCK

23. PLATE, DOOR REINFORCING

24. SCREW, M4 X 16 MM SS

25. OUTER DOOR SKIN

26. TURBOCHEF NAME PLATE, AL

27. N/A

28. N/A

29. N/A

30. ASSY GUIDE BLOCK

C3/C DOOR ASSEMBLY

1. SHUNT, DOOR

2. SEAL, ENVIRONMENTAL

3. SHUNT, SUPPORT, SHIM

4. SCREW, M4 X 12MM SS

5. COVER, DOOR PLASTIC

6. SHUNT SUPPORT DOOR

7. WASHER, M4 SS

8. WASHER, LOCK, M4 SS

9. NUT, M4 SS

10. DOOR INSULATION

11. DOOR INSULATION

12. HANDLE COOK CHAMBER

13. SCREW, M4 X 12MM SS

14. SPACER, DOOR HANDLE

15. ASSY, ARM RH

16. WASHER, M4 SS

1

2

3

4

5

6 8

9

7

10

11

12

13

14

15

16

18

19

20

21

22

23

24

25 26

27

28

29

30

TurboChef Technologies, Inc. C Series

7-19

C3/C AND C3/CMULTI DOOR ASSEMBLY PARTS: See Figure 4-8

Item

Part

Number

Description Used on Model(s)

1 C0190 SHUNT, DOOR C3/C & C3/CMULTI

2 C0325 SEAL, ENVIRONMENTAL C3/C & C3/CMULTI

3 C0427 SHUNT, SUPPORT, SHIM C3/C & C3/CMULTI

4 N/A SCREW, M4 X 12 MM SS C3/C & C3/CMULTI

5 C0254 COVER, DOOR PLASTIC C3/C & C3/CMULTI

6 C0426 SHUNT SUPPORT DOOR C3/C & C3/CMULTI

7 N/A WAHSER, M4 SS C3/C & C3/CMULTI

8 N/A WASHER, LOCK, M4 SS C3/C & C3/CMULTI

9 N/A NUT M4 SS C3/C & C3/CMULTI

10 C0575 DOOR INSULATION C3/C & C3/CMULTI

11 C0431 DOOR INSULATION C3/C & C3/CMULTI

12 C0267 HANDLE COOK CHAMBER C3/C & C3/CMULTI

13 N/A SCREW, M4 X 12 MM SS C3/C & C3/CMULTI

14 C0350 SPACER, DOOR HANDLE C3/C & C3/CMULTI

15 C0500 ASSY, ARM RH C3/C & C3/CMULTI

16 N/A WASHER, M4 SS C3/C & C3/CMULTI

17 N/A WASHER, LOCK M6 SS C3/C & C3/CMULTI

18 N/A BOLT, M6 X 20 MM SS C3/C & C3/CMULTI

19 C0550 ASSY, ARM, LH C3/C & C3/CMULTI

20 C0503 ASSY, PIN C3/C & C3/CMULTI

21 C0504 WASHER, NYLON C3/C & C3/CMULTI

Cook Door

7-20

C3/C AND C3/CMULTI DOOR ASSEMBLY PARTS (CON’T): See Figure 4-8

Item

Part

Number

Description Used on Model(s)

22 C0508 ASSY BEARING BLOCK C3/C & C3/CMULTI

23 C0507 PLATE, DOOR REINFORCING C3/C & C3/CMULTI

24 N/A SCREW, M4 X 16 MM SS C3/C & C3/CMULTI

25 C0193 OUTER DOOR SKIN C3/C & C3/CMULTI

26 C0581 TURBOCHEF NAME PLATE, Al C3/C & C3/CMULTI

30 C0514 ASSY GUIDE BLOCK C3/C & C3/CMULTI

TurboChef Technologies, Inc. C Series

7-21

Figure 7-9: C3/AB and C3Multi Door Assembly

Cook Door

7-22

C3/AB AND C3MULTI DOOR ASSEMBLY PARTS: See Figure 4-9

Item

#

Part

Number

Description Used on Model(s)

6

T0190

SHUNT, DOOR

C3/AB and C3/Multi

7

T0254

PLSTIC COVER, DOOR

C3/AB and C3/Multi

8

T0426

SHUNT SUPPORT DOOR

C3/AB and C3/Multi

9

T0193

OUTER SKIN, DOOR

C3/AB and C3/Multi

10

T0507

PLATE, DOOR REINFORCING

C3/AB and C3/Multi

11

T0325

GASKET, SHUNT

C3/AB and C3/Multi

12

M0999

SCRE

W, #8

-

32 X 3/8 SS

C3/AB and C3/Multi

13

R7329

SCREW, TAPPING, #8

-

32 X ½ SS

C3/AB and C3/Multi

14

C0581

NAMEPLATE

C3/AB and C3/Multi

15

NA

C3/AB and C3/Multi

16

T0360

INSULATION KIT

C3/AB and C3/Multi

17

T0267

HANDLE, DOOR

C3/AB and C3/Multi

18

3136

SCREW, CAP ¼

-

20 X .75 HEX SS

C3/AB and C3/Multi

19

M0417

WASHER, LOCK

C3/AB and C3/Multi

20

T0450

WASHER, FENDER

C3/AB and C3/Multi

21

T0350

SPACER

C3/AB and C3/Multi

22

T0508

BEARING AND BLOCK ASSY

C3/AB and C3/Multi

23

T0503

PIVOT

PIN AND BRACKET ASSY

C3/AB and C3/Multi

24

T0427

SHUNT, SUPPORT SHIM

C3/AB and C3/Multi

25

T0504

WASHER, NYLON 5/16

C3/AB and C3/Multi

26

T0505

SCREW, #8

-

32 X .88 PAN HD SS

C3/AB and C3/Multi

27

T0514

BLOCK ASSY, PIVOT, TRAILING

C3/AB and C3/M

ulti

28 T0558 SCREW, #8-32 X .38 FLAT HD SS C3/AB and C3/Multi

29

T0550

TRAILING ARM, ASSY LH

C3/AB and C3/Multi

30

T0500

TRAILING ARM ASSY RH

C3/AB and C3/Multi

CHAPTER 8

CONVECTION CIRCUIT

TurboChef Technologies, Inc. C Series

8-2

CATALYTIC CONVERTER

The catalytic converter (See Figure 8-1) is installed

in the return air duct behind the heater assembly.

The installation of the catalytic converter requires

a catalytic converter inner frame to properly

position it in the air path.

Due to the nature of most foods and the physics

governing the operation of the C3 SERIES oven,

grease buildup downstream of the cooking

chamber is inevitable. Strict cleaning regiments

can solve a majority of the problems, however,

recirculation of undiluted greasy saturated air is

the main cause of downstream grease

accumulation and any associated residual flavors.

The airborne grease tends to collect and bake

onto the oven surface downstream of the cooking

chamber. This grease, due to the high operating

temperatures of the oven, will start to rapidly

decompose into derivative organic compounds.

These decompositional derivatives generally have

positive and negative effects on cooking; the

shorter chain derivatives add favorable flavor

characteristics to the food, while the higher order

carbon chains lend unpleasant flavor char-

acteristics, such as bitter tarry tastes.

The installation of the catalytic converter greatly

effects the grease handling and any residual

flavors which might build up over time. A properly

operating catalytic converter causes the

conversion of airborne grease into water, carbon

dioxide and small amounts of nitrogen and

oxygen. The catalytic converter acts as a

combustion chamber for the airborne grease. The

catalysts present on the filter lowers the ignition

temperature of the airborne grease from

approximately 700ºF (371ºC) to 450–550ºF (232–

288ºC), allowing combustion to occur. The

operating temperature of the oven directly

determines the percentage of airborne grease

conversion. A single pass of the air stream yields a

20–30% improvement in air quality.

A problem with the catalytic converter is indicated

by a decrease in the effectiveness of browning

(caused by a reduction in airflow) or by flavor

transfer from one food group to another.

If you suspect the catalytic converter needs

cleaning refer to figures on page 8-5 and below.

These diagrams provide you with a location

reference and exploded view (Note: The Return

Air Duct Assembly Panel and the Terminal Heat

Shield may be inverted on some C3/AB units. All

C3/C units will have this assembly inverted). It is

important to carefully remove the insulation and

replace it neatly. The metal foil helps shield

microwave emissions.

IMPORTANT NOTE:

The catalytic converter can be cleaned with

TurboCare® oven cleaner and thoroughly rinsed

with DISTILLED water. Let the catalytic converter

air dry before reinstalling. IF TurboCare oven

cleaner is not available DO NOT SUBSTITUTE-

USE DISTILLED WATER.

Convection Circuit

8 - 3

CONVECTION ELEMENT AND

THERMOCOUPLES

The convection element (See Figure 8-1) is

located in the rear back on the left side of the

oven. It is controlled by one or two solid-state

relays (K5 and K7), depending on model, located

in the top, center of the control compartment of

the oven. Each relay coil operates on 24VDC

which is supplied from the I/O control circuit

assembly. The temperature is referenced by two

“K” type thermocouples.

• The HX thermocouple is in the rear of the

oven by the catalytic converter.

• The CC thermocouple is located on the top

left side of the oven near the front by the

door.

How To Turn Heaters ON and OFF

1) Press the BACK key until oven displays says

OVEN OFF.

2) From the OVEN OFF screen Press the BACK

& ENTER keys simultaneously and key in Pin

number 9-4-2-8 then ENTER.

3) Press the HEATER key and verify that status

indicators h and H go from the highlighted

position h H to the un-highlighted position

(this indicates the heater circuit is energized).

On the C3/AB and C3/C, only, one of the heater

wires to the hot air element is looped through

an inductance coil transformer on the I/O

control circuit assembly. It must draw a

minimum current of 7.5 amps to satisfy the

circuit. If it does not, the “H” status character

on the Test Mode display will be a reversed

character H.

4) Depress the HEATER key again and the

heaters will turn off. Again this is indicated by

the status indicators at the bottom of the

screen h H.

Status Indicators with HEATERS in the OFF

mode:

P – S – M– t – h – H – A – W

Status Indicators with HEATERS in the ON

mode:

P – S – M– t – h – H – A – W

Notes:

In order for the heaters to energize the blower

motor must be operational, usually indicated

by status indicator A always un-highlighted.

IMPORTANT HEATER DISCUSSION

The C series oven uses either an open coil or

sheathed heater. The open coil element is

obsolete, but may still be found in C3/AB ovens

and C3/C ovens. This heater is susceptible to

cleaners not approved by TurboChef. If this

heater fails, it should be replaced by the newer

sheathed heater (See Figure 8-3).

The sheathed heater consists of two individual

heating elements encased within one sheath;

therefore, when replacing the single–phase open

coil heater with this unit on the C3/AB or C3/C

you must wire the individual heaters in parallel

When wired correctly the total resistance should

be 12 ohms @ 240VAC (20 Amp draw). At 208

VAC the total resistance should be 9 ohms (23

amps draw).

Changing Heater Operating Voltage

All C3/C factory ovens are equipped with a

208VAC rating heater and set to operate at

208VAC, unless specified. If voltage supplied to

oven is 240VAC then change oven setup by

following the steps below:

1) Press and hold the BACK & ENTER keys

simultaneously and then key in 8-6-5-8 (VOLT).

2) Press the number 4 to set the oven at 240

then press the number 8 to select the heater

rating of 208VAC. A small H will appear next to

the OVEN OFF screen.

3. Change wiring on filament transformer to

represent supplied voltage.

Pins 1 & 2= 200VAC-208VAC

Pins 1 & 3= 240VAC

Replace the thermocouple as follows:

1. Make a note where the old thermocouple

exited the compression fitting.

2. Measure the distance from the exit point to

the end of the thermocouple.

3. Mark this distance on your new thermocouple

with a marker or a piece of tape.

4. Install the new thermocouple

TurboChef Technologies, Inc. C Series

8-4

Heater Circuit Defective Messages

SELF TEST (STEST) WHILE COOKING

(WARMING UP) CAUSE CORRECTIVE ACTION

THERMO OPEN THERMO OPEN HX Thermocouple amplifier

indicates open, (999°)."or"

CC Thermocouple amplifier

indicates open

1. Check Thermocouple connections on

I/O board connector (See I/O board

section for details) are not loose or

intermittently making contact with

mating connector.

2. Replace thermocouple.

HX RISE LOW

1) During the warm up cycle if a

14°F rise is not detected within 5

minutes of initial warm-up, then

the controller displays "HX RISE

LOW".

2) HX Temperature failed to rise

14°F in 30 seconds during the

self-test mode.

1. Check main internal circuit breaker.

If tripped, check the following

operation:

a) Interlock switches (Chapter 7)

b) Magnetron transformer (Page 9-8)

c) Hi-limit switch (See Figure 8-2)

2. Check heater fuse (F3). If fuse is

blown check for short to chassis on

all heater wires.

3. Check input current on heater

wires. (See Page 8-3)

4. Check operation of the heater

relay. (See Page 8-3)

5. Check blower operation (Page 8-9)

6. Check crimp connections on

controller.

7. Check HX Thermocouple.

LOW COOK TMP

(F3 LOW TEMP)

CC (Cooking Chamber)

temperature has dropped more

than 84°F (47°C) or more below

cook set point after 5 seconds or

more into cook cycle.

1. Check main internal circuit breaker.

If tripped, check the following

operation:

a) Interlock switches (Chapter 7)

b) Magnetron transformer (Page 9-8)

c) Hi-limit switch. See Figure 8-2.

2. Check blower operation. (Chapter

8-9)

3. Check CC Thermocouple circuitry.

4. Check Catalytic Converter (Page

8-2)

5. Check debris catcher (pepperoni

catcher). See Figure 8-2

6. Verify cooking chamber top air

nozzle holes are not clogged.

7. Open door and run blower from 0%

to 100% and verify blower is

working properly (Air pressure).

8. Verify oven software is greater

than Revision S (C3AD S).

Convection Circuit

8 - 5

FIGURE 8 - 1 Catalytic Converter Access

FIGURE 8 - 2 Thermocouple & Thermostat Locations

9

5

HEATER ASSEMBLY

(SEE FIG 5-3) FOR

ALL OPTIONS

HEATER BAFFLE (C3/AB

AND C3/C ONLY)

CATALYTIC

CONVERTER

INNER

BRACKET

Hi-Limit Thermostat

(18)

(HX)Thermocouple

(17)

12

14

or

15

1

16

TurboChef Technologies, Inc. C Series

8-6

CONVECTION ELEMENT ASSEMBLIES

FIGURE 8-3 Convection Heater Assemblies

SHEATHED HEATER ASSEMBLY ALL MODELS

1. GASKET, 3PHASE HEATER COVER

2. PLATE, SHEATHED HEATER

3. SHEATHED HEATER

4. WASHER, FLAT, HEATER, 5/8

5. WASHER, FIBER, 5/8

6. NUT, 5/8-18 CRES

OPEN COIL HEATER ASSEMBLY MODELS C3, C3/AB AND C3/C

(OBSELETE)

7. PLATE, C3 HEATER MOUNTING

8. GASKET, 3PHASE, HEATER COVER

9. HEATER ELEMENT, OPEN COIL

10. WAHER, SPLIT LOCK 8-32 (C3, C3/AB ONLY), M4 (C3/C)

11. SCREW, #8-32 X .38 PPHD, CRES (C3, C3/AB ONLY), M4 X 10 (C3/C)

7

8

9

4

5

6

10

11

OBSOLETE MODEL

Not

e: TC3

-

0200 Kit Retrofit, Sheated Heater

replaces the above obsolete model.

Convection Circuit

8-10

CONVECTION CIRCUIT PARTS LIST: See Figure 8-3

Ite

m

Part

Number

Description Used on Model(s)

1

TC3

-

0194

GASKET, 3 PHASE, HEATER COVER

All

2

TC3

-

0202

PLATE, SHEATHED HEATER

All

3

100652

-

1

24

0 VAC SHEATHED HEATER

All (240 VAC)

3

100652

-

3

208 VAC SHEATHED HEATER

All (208 VAC)

3

100652

-

3

200 VAC SHEATHED HEATER

All (200 VAC)

4,5,6 NA SHEATHED HEATER HARDWARE (SUPPLIED W/HEATER) All

7

TC3

-

0192

PLATE, C3 HEATER MOUTING (OBSELETE)

C3/AB, C3/C

8

TC3

-

0194

GASKET, 3 PHASE HEATER COVER

All

9

100665

240 VAC HEATER ELEMENT, OPEN COIL (OBSELETE)

C3/AB, C3/C

9

100666

208 VAC HEATER ELEMENT, OPEN COIL (OBSELETE)

C3/AB, C3/C

10

102390

WASHER, SPLIT LOCK, #8 CRES

C3/AB

10

102230

WASHER, SPLIT LOCK,

M4

C3/C

11

101665

SCREW, #8

-

32 PPHD, CRES

C3/AB

11

101671

SCREW, M4 X 10 mm

C3/C

12

T0185

CATALYTIC CONVERTER

All

13

100440

BLOWER MOTOR SPEED CONTROLLER (SP200)

All

13

100441

BLOWER MOTOR SPEED CONTROLLER (DELTA)

All

14

T0204

PEPPERONI CATCHER (

SMALL HOLE)

C3/AB, C3/C

15 TC3-0197A PEPPERONI CATCHER (EXPANDED METAL) MUST ONLY

BE USED WITH SHEATHED HEATER ASSY

All

16 C0260 BRACKET, CATALYTIC CONVERTER INNER C3C

17 102065 TYPE K THERMOCOUPLE All

18 R7603 HI-LIMIT THERMOSTAT All

Note: When upgrading to a new sheathed heater, order TC3-0200 which includes the

following items, 1, 2, 3 (specify voltage), 15. This kit is provided with a step by step field

service bulletin FSB10033.doc

Convection Circuit

8-10

CONVECTION (BLOWER) MOTOR OPERATION

The convection (blower) motor is a variable speed convection motor, which operates from zero rpm up to

7000 rpm. The blower motor speed is controlled by a SP200 AC/Delta drive control. The speed of the

motor is directly proportional to the applied low voltage to the SP200 AC./Delta drive control from the

control circuit card. The blower motor operates during warm up cycle, the normal idle operation (for

stabilization of the oven temperatures) and also while in the cooking mode at a set desired speed.

Additionally, during the Test mode, which allows the technician to manually operate the blower ON and

OFF to change the speed (0% to 100%).

HOW TO TURN THE BLOWER ON

1) Press the BACK key until displaying say OVEN OFF.

2) From the OVEN OFF screen Press the BACK & ENTER keys simultaneously and key in Pin # 9-4-2-8

then ENTER. Older units Pin# 8-3-1-7

3) Press the BLOWER key to increase air speed from 0-100%. Each time the key is pressed and increment

of 10% will occur on the air speed.

4) Verify status indicator "A" at the bottom of the screen is not highlighted.

P – S – M– t – h – H – A – W

5) Verify that the blower motor rotates freely and does not vibrate from imbalance.

6) Verify that the blower shaft rotates in the counter-clockwise (CCW) direction when viewing the shaft from

the right side of unit.

7) While in the TEST mode, Open the cook door and ramp the blower speed from 10-100% and verify air

pressure is present from the top of the cooking chamber. If oven is cold then place your hand inside

cooking chamber and as you ramp the blower air a substantial difference should be noted.

Checking input voltage at motor controller

1) Place Oven in Test Mode.

2) Press BLOWER Key and Measure Voltage (DC) between Pin 7 (SP-200) or Pin AVI (Delta) and ground.

Reference Table 8.1

SP-200 Pin # Delta Controller Pin #

3= Functional Loss/Reset AVI= 0-10VDC SPD CMD

4=Forward Run

M0= FWD Command

7=0 to 10 VDC M2= Reset

9= Common GND= Ground

11= 24V Common RC= 24V Com

12=Running command RB=Running Command

BLOWER MOTOR RPM-VS-LOW VOLTAGE INPUT TO CONTROLLER

Motor Speed (RPM) Voltage Measurement (VDC)

0 0.0 (varies from 0 to 0.2)

10 1.0

20 2.0

30 3.0

40 4.0

50 5.0

60 6.0

70 7.0

80 8.0

90 9.0

100 10.0

TABLE 8.1

TurboChef Technologies, Inc. C Series

8 - 9

Blower Circuit Defective Messages

SELF TEST WHILE COOKING CAUSE CORRECTIVE ACTION

BLOWER STATUS

or "F1 BLOWER" BLOWER STATUS

or "F1BLOWER" Blower motor speed

controller not returning the

"running status command"

See status indicator A

Note: If the door is opening

intermittently, the blower

will cease to operate.

1) Verify jumper on P3 of control

board is present and placed

according to motor controller

(see wiring diagram section

for details).

Pins 1&2=Reliance Controller

Pins 2&3=Delta Controller

2) Check Auxillary fuses (refer to

schematic

3) Verify incoming voltage is

present on controller input

(200-240VAC).

4) Verify status indicator A is not

highlighted. (See Page 5-3)

5) Check controller output

voltage on motor controller

(see Table 8-1)

6) Check fault messages on

blower motor speed controller

(refer to appropriate controller

selection).

7) Check all connections in the

blower circuit (ribbon cables,

signal wires).

8) Check all interlock switches.

9) Verify motor shaft turns freely,

if not then remove motor

assembly and inspect wheel.

Convection Circuit

8-10

Blower Motor Controller Fault Codes & Troubleshooting

NOTE: If no fault condition exists, the LED will be green. If a fault condition exists, the LED will flash

redhen a local keypad is not connected. All faults can be reset by cycling the reset control input,

pressing the stop key, or cycling power, except as noted in the Corrective Action column below.

NOTE: To recycle power, disconnect power for a full minute, or until the LED extinguishes, before

reapplying power.

Reliance Blower Motor Controller Fault Codes & Troubleshooting

# of

LED

Flashes

Fault

Description

Fault Cause

Corrective Action

2 Control Input • Illegal control input sequence • 3–wire: Verify Start and Jog inputs

are not both ON

• 2–wire: Verify that only one input

(Forward, Reverse, or Jog) is ON

2 Function Loss • Start attempt while STOP

(function loss) input is off • Verify STOP (function loss) input

is ON before attempting to start

drive.

3 Under Voltage • Low input line

• Temporary loss of input line

• Check input line to verify voltage is

within operating specifications

4 Over Voltage • High input line

• Decel time too fast

• Overhauling load

• Check input line to verify voltage is

within operating specifications

• Increase decel time

5 Drive Overload • Excessive driven load • Reduce the load

5 Motor Overload • Excessive driven load • Verify P-02 is set correctly

• Reduce the load.

• Check for mechanical binding

6 Over Temperature

• Operating environment is too hot

• Fan is blocked or not operating

• Excessive driven load

• Verify the ambient temperature is

<50ºC

• Verify clearance above/below

drive

• Check for fan obstruction. Replace

if necessary

• Reduce the carrier frequency (P–

64)

• Reduce the load

7 Over Current

(300%) • Shaft rotation blocked

• Excessive driven load

• Output wiring is incorrect or

shorted

• Check for obstructions to shaft

rotation or reduce excessive load

• Increase accel/decel time

• Verify output wiring is correct

8 Bad Keypad

Connection • Bad connection from keypad to

drive • Verify keypad is properly

connected to drive

• •

TurboChef Technologies, Inc. C Series

8 - 9

# of

LED

Flashes

Fault

Description

Fault Cause

Corrective Action

9 Negative Slope • Conflicting parameter values • Adjust values of parameters P–50

through P–54

• Phase U

• Phase V

Ground Short

• Phase W

• Verify output wiring is correct

• Verify output phase is not

grounded

• Verify motor is not damaged

• Phase U-V

• Phase U-W

10

Phase to Phase

Short • Phase V-W

• Verify output wiring is correct

• Verify motor is not damaged

11

Checksum Failure

• Parameter value out of range • Load default parameter values (P–

60=1), then cycle power. If fault

persists, replace drive.

12 Microprocessor

Fault • Internal processor error • Cycle power. If fault persists,

replace drive.

TABLE 5 - 2 Reliance Blower Motor Controller Fault Codes & Troubleshooting

Convection Circuit

8-10

Delta Blower Motor Controller Fault Codes & Troubleshooting

Fault

Name

Fault Descriptions Corrective Actions

Oc The AC drive detects an

abnormal increase in

current.

1. Check whether the motors horsepower corresponds to

the AC drive output power.

2. Check the wiring connections between the AC drive

and motor for possible short circuits.

3. Increase the Acceleration time (Pr.1-09, Pr.1-11).

4. Check for possible excessive loading conditions at the

motor.

5. If there are any abnormal conditions when operating

the AC drive after short-circuit being removed, it should

be sent back to manufacturer.

Ou The AC drive detects that

the DC bus voltage has

exceeded its maximum

allowable value.

1. Check whether the input voltage falls within the rated

AC drive input voltage.

2. Check for possible voltage transients.

3. Bus over-voltage may also be caused by motor

regeneration. Either increase the decel time or add an

optional braking resistor.

4. Check whether the required braking power is within the

specified limits.

OH The AC drive temperature

sensor detects excessive

heat.

1. Ensure that the ambient temperature falls within the

specified temperature range.

2. Make sure that the ventilation holes are not obstructed.

3. Remove any foreign objects on the heatsinks and

check for possible dirty heat sink fins.

4. Provide enough spacing for adequate ventilation.

Lu The AC drive detects that the DC bus voltage

has fallen below its minimum value 1. Check whether the input voltage falls within the rated AC

drive's input voltage.

OL The AC drive detects excessive drive output

current.

Note: The AC drive can withstand up to 150% of

the rated current for a maximum of 60 seconds.

1. Check the motor overload (shaft binding).

2. Reduce torque compensation setting as set in Pr.7-02.

3. Increase the AC drive's output capacity.

oLI Internal electronic overload trip 1. Check for possible motor overload.

2. Check electronic thermal overload setting.

3. Increase motor capacity.

4. Reduce the current level so that the drive output current

does not exceed the value set by the Motor Rated current

Pr. 7-00

oL2 Motor Overload. Check the parameters settings

(Pr.6-03 to Pr. 6-05) 1. Reduce the motor load.

2. Adjust the over-torque detection setting to an appropriate

setting.

TurboChef Technologies, Inc. C Series

8 - 9

Delta Blower Motor Controller Fault Codes & Troubleshooting

Fault

Name

Fault Descriptions Corrective Actions

ocA Over-current during acceleration:

1. Short-circuit at motor output.

2. Torque boost too high.

3. Acceleration time too short.

4. AC drive output capacity is too small.

1. Check for possible poor insulation at the

output line.

2. Decrease the torque boost setting in

Pr.7-02.

3. Increase the acceleration time.

4. Replace with the AC drive with one that

has a higher output capacity (next HP

size).

Ocd Over-current during deceleration:

1. Short-circuit at motor output.

2. Deceleration time too short.

3. AC drive output capacity is too small.

1. Check for possible poor insulation at the

output line.

2. Increase the deceleration time.

3. Replace with the AC drive with one

Ocn Over-current during steady state operation:

1. Short-circuit at motor output.

2. Sudden increase in motor loading.

3. AC drive output capacity is too small.

1. Check for possible poor insulation at the

output line.

2. Check for possible motor stall.

3. Replace with the AC drive with one that

has a higher output capacity (next HP

size).

EF The external memory IC can not be programmed 1. When the external terminal EF-GND is

closed, the output will be turned off.

(Under N.O E.F)

cFI Internal memory IC can not be programmed. 1. Switch off power supply.

2. Check whether the input voltage falls

within the rated AC drive input voltage.

3. Switch the AC drive back on.

cF2 Internal memory IC can no be read. 1. Check the connections between the

main control board and the power board

(internal to motor controller).

2. Reset drive to factory defaults

cF3 Drive's internal circuitry abnormal. 1. Switch off the power supply.

2. Check whether the input voltage falls

within the rated AC drive input voltage.

Switch on the AC drive.

HPF Hardware protection failure 1. Return to the factory. Replace

controller.

codE Software protection failure 1. Return to the factory. Replace

controller.

cFR Auto accel/decal failure 1. Do not use the function of auto

acceleration/deceleration.

GF Ground fault:

The AC drive output is abnormal. When the output terminal is

grounded (short circuit current is 50% more than the AC drive rated

current), the AC drive power module may be damaged. The short

circuit protection is provided for AC drive protection, not user

protection.

Ground fault:

1. Check whether the IGBT power module

is damaged.

2. Check for possible poor insulation at the

output line.

CEI Communication Error 1. Check the connections between the AC

drive and computer for loose wires.

2. Check if the communication protocol is

properly set.

bb External Base Block. AC drive output is turned off. 1. When the external input terminal (B.B)

is active, the AC drive output will be turned

off.

2. Disable this connection and the AC

drive will begin to work again.

Convection Circuit

8-10

Figure 8-6: Convection Motor Detail PN: C0299

Z

1

2

3

4

5

6

5 3 7 8 9

10

11

12

0.52 MIN

HEAT SLINGER TO PLATE

0.150 MAX

FAN BLADE TO CAP

7. CLAMP, BEARING SPRING

8. BLOCK, BLOWER BEARING SEAL

9. SPRING, COMPRESSION

10. HEAT SLINGER

11. SET SCREW (USE LOCTITE 290)

12. #605 WOODRUFF KEY

CONVECTION MOTOR ASSEMBLY

1. MOTOR, 1 HP

2. SPACER, BLOWER MOUNT

3. CAP, BLOWER

4. RING, FAN BLADE

5. FAN BLADE

6. HUB, FAN SMALL

TurboChef Technologies, Inc. C Series

8-14

CONVECTION MOTOR PARTS LIST: See Figure 5-6

Item

Part

Number

Description Used on Model(s)

- C0299 ASSEMBLY, BLOWER MOTOR All

1 T0076 Motor, 1HP, Mac All

4 6050070 RING FAN (unwelded) All

5 6050069 BLADE, FAN (unwelded) All

4&5 TC3-0214 RING AND FAN TACK WELDED All

6 7000306-2 HUB, FAN SMALL C3/AB & C3MULTI

6 C7000306-2 HUB, FAN SMALL C3/C & C3/CMULTI

7 7001179 CLAMP BEARING SPRING All

8 700-1177 BLOCK, BLOWER BEARING SEAL All

9 101733 SRING, COMPRESSION All

10 102708 HEAT SLINGER All

11 101715 SET SCREW #8 X 5/16 SS C3/AB & C3MULTI

11 101722 SET SCREW M4X6 SS C3/C C3/CMULTI

12 100730 #605 WOODRUFF KEY All

13 102320 BUTTON HEAD SCREWS All

Special Kits & Assemblies

Blower Hub Kit P/N: TC3-0238 consists of the following part numbers:

1- HUB, FAN SMALL: 700-0306-2

4- INTERNAL TOOTH WASHER: 101746

2- SET SCREW: 101715

4- BUTTON HEAD SCREWS: 102320

Notes:

 When ordering the above kit, request Field Service Bulletin (FSB100037.doc)

This page intentionally left blank.

CHAPTER 9

MICROWAVE CIRCUIT

TurboChef Technologies, Inc. C Series

9-2

MEASURING FOR MICROWAVE RADIATION LEAKAGE

The following RF emissions test must be

performed every time a service call is done on

a C3 SERIES oven. Report your findings on the

work order.

The following areas must be measured when

performing the RF test.

• Cook Door

• At any place on the outside of the oven (with

all covers in place).

Check for microwave leakage as follows:

1. Remove front bottom trim piece.

2. Place a load in the oven for testing. The load

must meet the following specifications:

A) Load must be 275 ml +/- 15 ml of water.

B) The water should be 77± 5ºF (25± 3ºC).

C) The container must be a low form, 600 ml

beaker with an inside diameter of

approximately 3.35” (8.5cm) and made of

an electrically non–conductive material

such as glass or plastic.

3. Enter the TEST mode. Refer to page 5-3 for

instructions for accessing TEST mode.

4. Position the door leak test tool on the door

handle. See FIGURE 9-1 for correct

positioning of the leak test tool.

5. Tighten the top screw to slowly open the door.

Stop when the control panel indicates that the

door switch has disengaged.

6. Loosen the top screw slowly until the control

panel indicates that the door switch has

engaged.

7. Test for microwave leakage as follows:

This test must be done in conformance with 21

CFR, Chapter 1, Part 1030-Performance

Standard for Microwave and Radio Frequency

Emitting Product. Part 1030.10 Microwave

Ovens. (C) Requirements - (1) Power Density

Limit. “The equivalent plane wave power

density existing in the proximity of the

external oven surface shall not exceed 1

milliwatt per square centimeter at any point

5 cm or more from the external surface of

the oven, measured prior to acquisition by

purchaser, and thereafter, 5 milliwatt per

square centimeter at any point.”

A) The tip of the probe should be touching

the oven surface being measured with the

probe handle perpendicular to the surface.

B) Move the probe counterclockwise around

the perimeter of the door starting from the

upper right corner at a speed of less than

0.5” per second. Be sure to probe entire

door perimeter, returning to the upper right

corner.

8. Exit the diagnostic mode.

9. Repeat STEPS 2 and 7 with the cook door

closed.

WARNING!!

If the unit fails the radiation test, the oven

must be taken out of service immediately

until the defect is corrected. In addition,

the Code of Federal Regulations 21

Subpart C, 1002.20 requires that leakage

readings of over 5 mW/cm

2

MUST be

reported to the manufacturer.

10.

Door Leak Test Too

l

FIGURE 9 - 1 Microwave Leakage Testing

Microwave Circuit

9-5

Microwave Circuit Defective Messages

SELF TEST WHILE COOKING CAUSE CORRECTIVE ACTION

LOW MAG CURR

*HV BREAKDOWN

F3 MAG CURR

* European ovens

only

LOW MAG CURR

*HV BREAKDOWN

F3 MAG CURR

Note:

If this message is

detected while

cooking it will

terminate cook

cycle immediately.

Oven CT1 (computer board

current sensor) did not

detect current to the

magnetron transformer.

Notes:

1) Magnetron must be ON

to detect current in circuit.

2) If main circuit breaker

keeps tripping for no

apparent reason, check hi-

limit switch, monitor relay,

heater, mag ssr operation.

1. Check main internal circuit

breaker. .If tripped, check the

following operation:

a) Cook Door Switch

Misalignment (Chpt. 7)

b) Magnetron transformer

(Page 9-8)

c) Hi limit switch (Page 8-2)

d) Heater Failure (Page 8-2)

e) Shorted diode

2. Check operation of the monitor

relay (door operation).

3. Check input current to K4-1

wire. Microwave circuit measures

approximately 9 Amps. If higher

than 15A replace anode

transformer (See 9-8).

4. Check diode

5. Check capacitor

6. Check magnetron

7. Check ssr operation

8. Filament Transformer

9. Current Transformer on

computer board. See Page 6-

10

MAG OVER TEMP

F5 MAG TEMP

MAG OVER TEMP

F5 MAG TEMP

Note: If this

message is

detected while

cooking it will

terminate cook

cycle immediately

Oven software detected

Magnetron thermostat

open. Implying the

magnetron case

temperature is above 212˚F

(100˚C), therefore opening

switch and canceling

magnetron operation or

loose connection.

1. Check Magnetron Thermostat

for loose wires.

2. Check for proper operation of

magnetron blower (Note:

Magnetron fan only operates only

when magnetron is energized and

remains on for 3 minutes after

magnetron is turned off).

3. Check for loose wiring in the

circuit.

4. Check magnetron fan relay for

proper operation.

TurboChef Technologies, Inc. C Series

9-4

Microwave Circuit

9-5

MAGNETRON CIRCUIT

Overview of a microwave circuit

The microwave circuit consists of a magnetron

and a voltage doubler circuit. The voltage doubler

consists of a special step–up transformer, a

capacitor, a diode. In addition to the power

circuitry in the magnetron the oven utilizes a

filament transformer to pre-heat the magnetron

filament before applying the high voltage to the

anode. As for safety a monitor circuit is used to

make the magnetron circuit fail in the failsafe

mode.

Monitor Circuit Description:

In addition to the HV circuit, it is imperative to

understand how the monitor circuit operates.

The Monitor Circuit is a failsafe circuit that is

designed to protect the operator if both the

Primary and Secondary Interlock Switches fail to

operate normally.

The Monitor Circuit consists of the Primary

Interlock Switch, Secondary Interlock Switch,

Monitor Safety Switch, Monitor Relay and the trip

coil on the 35A circuit breaker. When the Cook

Door closes during normal operation, the Monitor

and Secondary/ Primary Switches close in this

order. When all switches are closed, the

microwave system is allowed to operate. If

during normal operation, either Interlock Switch

opens, such as when the Cook Door opens, the

Control system will turn OFF the Microwaves;

however, if the Monitor Switch opens before both

the Primary and Secondary Interlock switches,

i.e., abnormal operation, the Monitor switch will

de-energize the Monitor Relay. When this

occurs, a dead short is placed across L1 and L2.

The short then trips the trip coil on the circuit

breaker, which permanently interrupts power to

the Microwave system until both the Primary and

Secondary Interlocks are repaired. See Figure

below for a schematic of the monitor circuit. .

Microwave Circuit

9-6

Magnetron High Voltage Transformer (102093)

The magnetron transformer is a ferro-resonant

design which limits fault currents and minimizes

magnetron power changes due to input voltage

changes. An automatic resetting over-

temperature switch is embedded in the high

voltage secondary winding and removes power

form the primary winding if an over-temperature

condition occurs.

In the C3 SERIES a separate transformer is used

to preheat the filament for the magnetron for

better operation.

+(B)

0

-

(C)

HV TRANSFORMER

OUTPUT VOLTAGE MAGNETRON VOLTAGE

Current

Flow

2400

+

-

+

-

2400

VDC

Current

Flow

+

-

+

2400

VDC

4800

VDC

+(B)

(A)

-

(C)

- 4800 V

CAPACITOR CHARGES ON

POSITIVE VOLTAGE SWING

CHARGED CAPAC

ITOR PLUS TRANSFORMER

ON NEGATIVE VOLTAGE SWING

+2400 V

-2400 V

(A)

0

1.

The Magnetron Transformer steps up the input voltage to approximately 2400 volts peak

(4800 volts peak to peak).

2.

The High Voltage Capacitor charges to 2400 volts on the positive going voltage via the

High Voltage Diode’s forward conduction.

3. The Magnetron Transformer plus the charged High Voltage supply up to -

4800 volts to the

Magnetron on the negative going voltage (High Voltage Diode is back biased).

4. The Magnetron converts the negative input voltage

(and Current) to RF energy at 2450

MHz with approximately 60% efficiency.

WARNING: DO NOT ATTEMPT TO MEASURE THESE VOLTAGES

FIGURE 9 - 2 Magnetron High Voltage Power Supply

TurboChef Technologies, Inc. C Series

9-7

Filament Transformer(102091)

Background:

The filament transformer is a step down

transformer from 208-240VAC to about 4-5VAC.

This voltage pre-heats the magnetron filament

allowing it to be ready once the magnetron is

energized by the high voltage transformer. This

method in the industry is known as hot start and

highly used to increase the life expectancy of the

magnetron.

The filament transformer and stirrer motor are

energized by K3 relay when the control signal is

grounded at the same time, K1 relay is energized

to provide power to the magnetron cooling fan.

Both relays, by means of software, will remain in

the ON state for 3 minutes after the

MAGNETRON circuit has been turned OFF. The

typical failure mode of the filament transformer is

intermittent operation, meaning that it may not

delivered 4-5 volts to the filament of the

magnetron, thus not pre-heating the magnetron

filament. In this cases the current going to the

high voltage transformer may lag. This can result

in a "MAG CURR LOW" message.

DANGER!!: Do not attempt to measure

voltage at pins 4 and 5 of filament transformer

without actually isolating it from the high voltage

circuit (disconnect anode transformer, capacitor,

magnetron and diode). If not isolated the circuit

will have a potential of 4800 volts.

Checking the filament transformer

DANGER!! HIGH VOLTAGE

Step 1: Disconnect anode wire from T1

transformer (pin 7 or 6 on transformer) and place

circuit breaker in the OFF position; this will isolate

the high voltage part of the microwave circuit.

Next, disconnect the wires going to the

magnetron and connect them to your voltmeter

(select AC mode).

Step 2: Place oven in TEST mode. Press BACK

key until the oven screen displays " OVEN OFF"

then Press and hold the BACK and ENTER keys

simultaneously and then key in PIN # 9-4-2-8

(access code) then ENTER. This will allow you to

enter into the test mode to manually energize the

magnetron.

Step 3: Press and release immediately the

MGTRON key and observe the voltage at

voltmeter, reading should be around 4.6VAC.

Microwave Circuit

9-8

MAGNETRON TESTING

WARNING!!

The microwave circuit cannot be worked

on with the unit on. The unit must be

disconnected from the power source.

Failure to do so could result in injury or

death.

WARNING!!

The HV Capacitor must be discharged

before proceeding.

Checking a Magnetron for Open or Shorted

Filaments:

1. Disconnect the AC power source and

discharge the High Voltage Capacitors.

2. Isolate the magnetron from the circuit by

removing the wires from the F and FA

terminals.

3. An ohmmeter connected between the filament

terminals (F, FA) should indicate a reading of

less than 1 Ohm.

4. A continuity check between either filament

terminal and the magnetron chassis should

indicate an infinite resistance (open).

MAGNETRON REMOVAL AND REPLACEMENT

1. Remove door hinge bar support angle.

2. Remove magnetron cooling fan, duct work and

magnetron as an assembly.

3. Unplug and remove magnetron.

4. Install new magnetron.

5. Check the oven for microwave leakage. Refer

to page 6-1 for instructions.

Door

Hinge Bar

Support Angle

Magnetron Cooling Fan

Magnetron

View A

See View A

FIGURE 6 - 3 Magnetron Removal and Replacement

Microwave Circuit

9-9

COMPONENT TESTING

WARNING!!

The microwave circuit cannot be serviced

with the unit on. The unit must be

disconnected from the power source.

Failure to do so could result in injury or

death.

WARNING!!

The HV Capacitor must be discharged

before proceeding.

WARNING!!

Do not attempt to measure the magnetron

anode or filament voltages. Failure to do

so could result in injury or death.

TRANSFORMER TESTING

1. Disconnect the power source and discharge

the capacitor.

2. Isolate the transformer from the circuit. (Wires

are labeled but remember where they go)

3. Check impedance of the primary and

secondary windings. See TABLE 9-1 AND

FIGURE 9-4.

4. Filament winding should read less than 0.1

ohms.

5. Reconnect wires.

WARNING!!

When replacing the anode transformer,

remove the varnish around the

mounting holes to insure proper

grounding.

TRANSFORMER SPECIFICATIONS

Main Transformer (Anode) Filament Transformer

Primary DCR 0.58 Ohm. Primary DCR (1-2) 23.2 Ohm

(1-3) 27.8 Ohm

Secondary DCR: (5-6) 46.39 Ohm

(5-7) 54.00 Ohm Secondary DCR: (4-5) .020 Ohm

Input Voltage : 208-240 VAC, 50/60 HZ Input Voltage : 200-208/240 ± 10%, 50/60 HZ

Input Current: 9.0 Amps RMS Input Current: 0.42 Amps @ 208 VAC

0.35 Amps @ 240 VAC

Anode Voltage: 2400 VDC Peak @ 0.83 Amps Filament Voltage: 4.6 VAC @ 14 Amps

TABLE 6 - 1 Transformer Specifications

DIODE TESTING

WARNING!!

DO NOT attempt to measure HV directly.

1. Isolate diode from circuit.

2. Connect the meter leads to the diode

terminals.

3. Resistance readings (open) should be

indicated in the reverse direction.

4. Resistance readings in the forward direction

may be indeterminate due to the number of

diodes in series making up this assembly.

5. If there is continuity in both directions (shorted

diode).

CAPACITOR TESTING

1. Disconnect the oven from the power source.

2. Isolate the capacitor from the circuit.

3. Fully discharge the capacitor.

4. Connect the ohmmeter between the capacitor

terminals. The meter should indicate a low

impedance and then slowly return to infinite

resistance.

5. Reverse the ohmmeter leads. Repeat step 4.

6. Check each terminal to case. Infinite

resistance (open) should be indicated.

TurboChef Technologies, Inc. C Series

9-10

WARNING!!

Use extreme caution when taking any

current readings. Failure to do so can

result in death or serious injury.

4 5

FILAMENT TRANSFORMER

1

2

3

4

1

3

2

820MW3 ANODE TRANSFORMER

T2 FILAMENT TRANSFORMER

T1 ANODE TRANSFORMER

REAR VIEW

FRONT VIEW

5

6

750 HZ

60 HZ

1

2

3

1

50 HZ

7

6

5

4

5

2

F

3

4

60 HZ

FA208-240 VAC

INPUT MAGNETRON

4500 VPK, 415 MA

15 KV

HV DIODE

1.05 uF (60 HZ)

1.20 uF (50 HZ)

HV CAPACITOR

PRIMARY COMMON

240 VAC

200-208 VAC

UNUSED

WINDING

(4-5) 4.6 VAC SECONDARY

0.20 OHMS

PRIMARY COMMON

(1-3) 240 VAC

27.8 OHMS

(1-2) 200-208 VAC

23.2 OHMS

HV ANODE WINDING (SECONDARY)

(5-6) 60 HZ 46.39 OHMS

(5-7) 50 HZ 54.00 OHMS

(3-4) UNUSED

FILAMENT

WINDING

(1-2) 208-240 VAC

0.58 OHMS

TRANSFORMERS.DWG

FIGURE 9-4 Transformer Testing

TurboChef Technologies, Inc. C Series

9-11

Waveguide Components:

Figure 9-6: Waveguide Assy

Microwave Circuit

9-12

WAVEGUIDE COMPONENTS PARTS LIST: See Figure 9-6

Item

#

Part

Number

Description Used on Model(s)

1 T0266 BLADE, STIRRER ALL

2 T0289 SHAFT, STIRRER C3/AB, C3MULTI

2 C0289 SHAFT, STIRRER C3/C, C3/CMULTI

3 T0290 HUB, STIRRER SHAFT C3/AB, C3MULTI

3 C0290 HUB, STIRRER SHAFT C3/C, C3/CMULTI

4 T0282 SPROCKET, STIRRER SHAFT, .125 BORE All

5 T0284 BELT, STIRRER MOTOR All

6 T0397 MOUNTING PLATE, STIR MOTOR C3/AB, C3MULTI

6 C0391 MOUNTING PLATE, STIR MOTOR C3/C, C3/CMULTI

7 T0283 SPROCKET, MOTOR, 4MM BORE All

8 100891 MOTOR, 6 RPM All

9 101550 SCREW, 4-40 X 5/8 PPH SS C3/AB, C3MULTI

9 TBD SCREW, M3 x 12 mm SS C3/C, C3/CMULTI

10 102370 WASHER, SPLIT LOCK #4 SS C3/AB, C3MULTI

10 TBD WASHER, SPLIT LOCK M4 SS C3/C, C3/CMULTI

11 101590 SCREW, 6-32 X 3/8 PPH SS C3/AB, C3MULTI

11 TBD SCREW, M4 x 8 MM SS C3/C, C3/CMULTI

12 102380 WASHER, SPLIT LOCK #6 SS C3/AB, C3MULTI

12 TBD WASHER, SPLIT LOCK M4 C3/C, C3/CMULTI

13 102035 PIN CONNECTOR C3/AB, C3MULTI

14 102716 CONNECTOR HOUSING C3/AB, C3MULTI

15 102270 WASHER, INTERNAL LOCK, #6 SS C3/AB, C3MULTI

TurboChef Technologies, Inc. C Series

9-13

WAVEGUIDE COMPONENTS PARTS LIST (con’t): See Figure 9-6

Item

#

Part

Number

Description Used on Model(s)

15 TBD WASHER, INTERNAL, LOCK, M4 SS C3/C, C3/CMULTI

16 700-1339-1 CLAMP, WAVEGUIDE, SINGLE WIRE C3/AB, C3MULTI

16 C700-1339-1 CLAMP, WAVEGUIDE, SINGLE WIRE C3/C, C3/CMULTI

17 700-1321 SEAL, RING WAVEGUIDE C3/C, C3/CMULTI

18 102650 WAVE, SPRING WASHER All

19 700-1213 PLUG, WAVEGUIDE, QUARTZ All

20 700-1333 SEAL, PLUG TEFLON All

NS 100480 HV Diode All

NS 100206 HV, Capacitor, 2500 V All

NS 102091 Filament Transformer All

NS 102093 Magnetron Transformer T1 All

CHAPTER 10

I/O Board & Schematics

TurboChef Technologies, Inc. C Series

10-2

10-5

TurboChef Technologies, Inc. C Series

10-4

10-5

K4(MAGA)

P1

EMI

P1

L

N

P1

L

N

L

N

L

N

L

N

4-3+

21

2

1

3+ 4-

K1(MAG FAN)

(8130F -44-93)

T1

820MW 4

TurboChef Technologies, Inc. C Series

10-6

1

3

2

4

7

6

5

1- Software EPROM

2- R51 Beeper Volume Adjustment

3- Microprocessor

4- P3- Blower Motor Controller Mode Selector SP200=1&2

5- R24- RF Fluctuation Adjustment (Optional)

6- R42- 5 Volt Reference Adjustment

7- P1 +5VDC Reference Point

Microwave Circuit

10-7

8

13

9

12

10

11

14

8- J2 40 Pin Connector (Most signal wires are terminated here!)

9- J5 26 Pin Flat Cable (from front panel VFD)

10- J3 5 VDC Power Supply to Vacuum Fluorescent Display

11- J1 RF Cable Connection (Optional)

12- J6 RS232 Cable (Menu Download port)

13- J4 Keypad membrane cable

14- Interlock Relays (Primary and Secondary)

Turbo Chef Technologies C3 Ab Users Manual Service

C3AB to the manual 163e4422-a5b0-4707-a1b1-4831c4196b53

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