Blodgett accellis C70 Installation and operating manual

BLODGETT OVEN COMPANY
www.blodgettcorp.com
50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Telephone [phone] Fax: [phone]
PN T0582 Rev F (3/01)
E2000 --- G.S. Blodgett Corporation
C70
CONVECTION MICROWAVE OVEN
SERVICE AND REPAIR MANUAL

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.....................................................
RF Interference Considerations vi.............................................
Section 1 Installation Specs
Oven Description 1 --- 1....................................................
Installation 1---1.........................................................
Section 2 Cleaning & Operating
Basic Cleaning Procedures 2---1...........................................
Oven Cavity Filter Cleaning 2---2...........................................
Glossary of Common Operating Terms & Error Messages 2---3................
Operational Flow Chart 2---4..............................................
Programming Flow Chart 2---6.............................................
Section 3 Test
Test Function Quick Reference 3---1........................................
Test Function Detailed Description 3---2.....................................
Section 4 Electrical Compartment
Key Sequence of Operation --- Failure Mode Analysis 4---1....................
Electrical Component Locations 4---2.......................................
Electrical Component Description with Voltage Information 4---3...............
Door Switches and Circuit Breakers 4---5...................................
Door Switch Adjustment 4---6.............................................
Door Removal and Replacement 4---9......................................
C70 Schematic 4---12.....................................................
Section 5 Convection Circuit
Catalytic Converter 5---1..................................................
Convection Element and Thermocouples 5---2...............................
Thermoelectric Voltage in Millivolts --- Type K Thermocouple 5---3...........
Convection (Blower) Motor Operation 5---4..................................
Blower Motor Controller Fault Codes & Troubleshooting 5---5..................

TABLE OF CONTENTS
Section 6 Microwave Circuit
Measuring for Microwave Radiation Leakage 6---1...........................
Magnetron Circuit 6---2...................................................
Magnetron Testing 6---3..................................................
Magnetron Removal and Replacement 6---3.................................
Component Testing 6---4..................................................
Transformer Specifications 6---5...........................................
Control Circuit Board 6---6................................................

i
READ THIS FIRST
TECHNICAL SUPPORT PHONE NUMBER
1-888-992-6624
This Service and Repair manual is set up for use by qualified technicians only. If you are unfamil-
iarwiththisoven,callthefactoryatthetollfreenumberabovefor technicalassistance.Technical
support can be reached 24 hours a day, seven days a week.
Before working on the Acellis C-70 oven you must first read the safety instructions on the following
pages. The Accellis C-70 is a combination convection/microwave oven. While servicing this oven, an
RFmetermustbeusedatalltimestocheckformicrowaveleakage.ThisRFreadingmustberecorded
on your work invoice.
Very often poor cleaning will result in microwave leakage. Please refer to the first two sections of this
manual (INTRODUCTION and CLEANING & OPERATION) for information on the proper cleaning pro-
cedures.
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
themagnetroncircuit canself-discharge.FAILURETODOSOMAYRESULTINDEATHORSERIOUS
INJURY.
This oven has a one time registration feature on initial start-up. The Accellis C-70 will not operate until
you have called and registered the oven location andphone numberwith technicalsupport. Upon reg-
istration, an access code will be issued. Be sure that you have the location of the installation site and
phonenumberbeforecallingforregistration.
This manual is divided into seven (7) 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 pro-
cedures of the oven and the procedure to edit or change a cooking
program.
3. TEST --- This chapter details the Test Mode, which allows the technician to
operateindividualcomponentsorsectionoftheAccellisC-70oven.
Using this feature will isolate most electrical troubleshooting
problems.
4. ELECTRICAL COMPARTMENT --- This chapter identifies the electrical compartment componentsand
providesvoltageinformation.Usethekeytohelpisolateelectrical
troubleshooting problems.
5. CONVECTION &
CATALYTIC CONVERTER --- This chapter provided information on the convection and blower
motorspeedcontrol.Removalandcleaningofthecatalyticconvert-
er are also provided.
6. MICROWAVE CIRCUIT --- This chapter includes information on the microwave circuit and stir-
rer motor.

ii
SAVE THESE INSTRUCTIONS
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:
7. Read all instructions before using the appliance.
8. Read and follow the specific PRECAUTIONS TO AVOID POSSIBLEEXPOSURE TOEXCESSIVE
MICROWAVE ENERGY found on page iii.
9. This appliance must be grounded. Connect onlyto properlygrounded outlet. See GROUNDING
INSTRUCTIONS found on page iv.
10. Install or locate this appliance only in accordance with the provided installation instructions.
11. Some productssuchaswhole eggs and sealed containers --- for example, closed glass jars --- may
explode and SHOULD NOT be heated in this oven.
12. 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.
13. Children SHOULD NOT use this appliance.
14. 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
iv.
15. This appliance should be serviced only by qualified service personnel. Contactthe nearest autho-
rized service facility for examination, repair or adjustment.
16. DO NOT cover or block any openings on the appliance.
17. 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.
18. DO NOT immersecordorpluginwater.
19. Keep cord away; from heated surfaces.
20. DO NOT letcordhangoveredgeoftableorcounter.
21. DO NOT useawaterjetforcleaning.
22. See the Maintenance section of this manual.
23. To reduce the risk of fire in the oven cavity:
a.) DONOTovercook food. Carefully attend applianceif paper, plastic, orother combustible mate-
rials are placed inside the oven to facilitate cooking.
b.) Removewiretwist---tiesfrompaperorplasticbaginoven.
c.) If materials inside theovenshouldignite, keep oven door closed, turn oven off, and disconnect
thepowercord,orshutoffpoweratthefuseorcircuitbreakerpanel.
d.) DONOTusethecavityforstoragepurposes.DONOTleavepaperproducts, cookingutensils,
or food in the cavity when not in use.

iii
SAVE THESE INSTRUCTIONS
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
inharmfulexposuretomicrowaveenergy.Itisimportantnottodefeatortamperwiththesafetyinter-
locks.
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. DONOToperatetheoven ifitisdamaged. Itisparticularlyimportant thatthe ovendoor closeprop-
erly 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 properlyqualified service per-
sonnel.

iv
SAVE THESE INSTRUCTIONS
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. Beforeturningonmicrowavepowerforanyservicetestorinspectionwithinthemicrowavegenerat-
ing 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 NO TAG of this manual for microwave leakage testing proce-
dure.
5. Any defective or mis-aligned components in the interlock, monitor, door seal, and microwave gen-
eration and transmission systems shall be repaired, replaced, or adjusted by procedures de-
scribed 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 NO TAG of this manual
for microwave leakage testing procedure.

v
SAVE THESE INSTRUCTIONS
GROUNDING INSTRUCTIONS
This appliance MUST BE grounded. In the event of an electrical short circuit, grounding reduces the
risk of electric shock by providing an escape wire for the electric current. This 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 under-
stood, 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.

vi
SAVE THESE INSTRUCTIONS
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
CouncilDirective89/336/EEContheapproximationofthe lawsoftheMemberStatesrelatingtoelectro-
magnetic compatibilityat the time ofmanufacture. However, someother equipmentmay exhibitsensi-
tivity 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.

INSTALLATION SPECS
CHAPTER 1