Amana Menumaster CRC21T2 Service Manual

Service
This manual replaces RS2230003 Rev. 1
This Base Manual covers Commercial Microwave Ovens with 120/230 V, 60 Hz. Refer to individual Technical Sheet for information on specific models. This manual includes, but is not limited to the following:
CRC21T2 CRC18T2 CRC18T2SD CRC12T2 CRC12T CRC10T2 CRC10T FSC18VP FSC12VP FSC10VP
Service Manual for Amana Menumaster
®
®
This manual is to be used by qualified appliance technicians only. Amana does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person.
RS2230003
Revision 2
December 1998
!
!
Important Product Information
!
WARNING
Precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy .
(A) Do not operate or allow oven to be operated with
the door open.
(B) Make the following safety checks on all ovens to be
serviced before activating the magnetron or other microwave source, and make repairs as necessary:
• Interlock operation
• Proper door closing
• Seal and sealing surfaces (arcing, wear, and other damage)
• Damage to or loosening of hinges and latches
• Evidence of dropping or abuse
(C) Before turning on microwave power for any service
test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity , and connections.
(D) Any defective or misadjusted components in the
interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before oven is released to the consumer.
(E) Check microwave leakage to verify compliance
with the Federal Performance Standard should be performed on each oven prior to release to the consumer.
WARNING
To avoid risk of electrical shock, injury, or death, make sure these grounding instructions are followed.
Grounding Instructions
WA RN IN G
Do not remove grounding prong when installing grounded appliance in a home or business that does not have three wire grounding receptacle, under no condition is grounding prong to be cut off or removed. It is the personal responsibility of the consumer to contact a qualified electrician and have properly grounded three prong wall receptacle installed in accordance with appropriate electrical codes
Should a two prong adapter plug be required temporarily it is the personal responsibility of the consumer to have it replaced with properly grounded three prong receptacle or the two prong adapter properly grounded by a qualified electrician in accordance with appropriate electrical codes.
Servicing of Grounded Products
The standard accepted color coding for grounding wires is GREEN or GREEN WITH YELLOW STRIPE. These ground leads are NOT to be used as current carrying conductors. It is extremely important that the technician replace any and all grounds prior to completion of the service call. Under no condition should ground wire be left off causing a potential hazard to technicians and consumer.
WIRING
Good service practice is to never route wiring over terminals and/or sharp edges. This applies to any wiring without regard to the circuit voltage. Wire insulation material and thickness is designed and regulated for electrical spacing purpose only , but cannot always be relied upon because of possible cuts and/or abrasions, which can occur during servicing.
RS2230003 Rev. 2 2
Table of Contents
Important Product Information ..................................... 2
T able of Contents ........................................................ 3
Impo rtant I nform ation .................................................. 4
Important Safety Information ....................................... 5
Product Information
Antenna Blade ......................................................... 8
Blower/Fan Assembly.............................................. 8
Grease Shield.......................................................... 8
Door Interlock and Monitoring Switch....................... 8
Auto Transformer ..................................................... 8
Transformer High V oltage......................................... 8
High Voltage Capacitor ............................................ 8
High Voltage Diode (Rectifier) .................................. 8
Magnetron ............................................................... 8
Thermal Protectors .................................................. 8
T ouch Panels........................................................... 8
Triac ........................................................................ 8
Stirrer Motor ............................................................ 8
Installation
Unpacking Oven ...................................................... 9
Oven Placement ...................................................... 9
Radio Interference ....................................................9
Grounding Instructions ............................................. 9
Care and Cleaning
Changing Oven Light Bulb...................................... 10
Cleaning Interior, Exterior , and Door....................... 10
Cleaning Splatter Shield ........................................ 10
Cleaning Air Intake Filter ....................................... 1 1
Cleaning Discharge Air Vents ................................ 1 1
Control Pads............................................................. 1 2
Displays.................................................................... 1 3
Quick Reference Instructions .................................... 1 4
Operation
Power-up Display................................................... 15
Interrupting Operation ............................................ 1 5
Canceling Mistakes ............................................... 15
Preprogrammed Times and Cook Level.................. 15
Operating Preprogrammed Pads............................ 15
Programming Instructions
Reviewing Preprogrammed Pads ........................... 16
Manual Time Entry ................................................ 16
Preprogrammed Number Pads............................... 16
Multiple Heating Stages......................................... 1 7
Deactivating Preprogrammed Pad.......................... 17
Reactivating Preprogrammed Pad.......................... 17
Deactivating Control Panel..................................... 17
Reactivating Control Panel..................................... 17
User Options ......................................................... 18
Component T esting Procedures ................................ 19
Microwave Power T est ........................................... 2 2
Radiation Leakage T esting
Equipmen t ............................................................. 2 3
Procedure for Measuring Radiation Leakage.......... 23
Measurement with Outer Case Removed ............... 23
Measurement with a Fully Assembled Oven .......... 23
Record Keeping and Notification
After Measurement ................................................ 23
Troubleshooting
Initial Power Up .................................................. 24
Standby Condition .............................................. 25
Cook Condition................................................... 26
Disassembly
Door Removal ........................................................ 27
Inner Door Window Disassembly ........................... 27
Door Disassembly ................................................. 2 7
Door Handle........................................................... 27
Hinge ..................................................................... 27
Outer Case ............................................................ 27
Door/Interlock Switch Adjustment/Replacements .. 28
Back Panel............................................................ 29
T op Antenna Assembly (some models) ................. 2 9
Bottom Antenna Assembly (some models) ........... 29
Oven Tray Removal ................................................ 29
Stirrer Motor (some models top) ............................ 29
T ouch Panel Assembly.......................................... 2 9
Controller Board..................................................... 29
Interlock Switch Assembly .................................... 29
Magnetron Cutout (TCO) ........................................ 3 0
Triac ...................................................................... 30
Diodes ................................................................... 30
Magnetron ............................................................. 30
Cavity Thermal Fuse Replacement ........................ 30
Fuse ...................................................................... 31
Blower Wheel and Motor........................................ 31
Fan Blade .............................................................. 3 1
Auto Transformer ................................................... 31
Transformer ........................................................... 31
Capacitor ............................................................... 3 1
Power Cord............................................................ 31
Light Socket .......................................................... 32
Replacing Oven Light Bulb..................................... 32
Component Location
Figure 1 .............................................................. 33
Figure 2 .............................................................. 34
Figure 3 .............................................................. 35
Amana Appliances • 2800 220thTrail • Amana, Iowa • 52204-0001 • Printed in the U.S.A.
3 RS2230003 Rev. 2
!
!
!
!
!
Important Information
Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.
Important Notices for Consumers and Servicers
WARNING
T o avoid risk of serious injury or death, repairs should not be attempted by an unauthorized personnel, dangerous conditions (such as exposure to electrical shock) may result.
CAUTION
Amana will not be responsible for any injury or property damage from improper service procedures. If prefroming service on your own product, assume responsibility for any personal injury or property damage which may result.
To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact:
CONSUMER AFFAIRS DEPT. OR 1-319-622-5511 AMANA REFRIGERATION, INC. CALL and ask for AMANA, IOWA 52204 Consumer Affairs
If outside the United States contact:
AMANA ATTN: CONSUMER AFFAIRS DEPT 2800 220th Trail AMANA, IOWA 52204, USA Telephone: (319) 622-5511 Facsimile: (319) 622-2180 TELEX: 4330076 AMANA CABLE: "AMANA", AMANA, IOWA, USA
Recognize Safety Symbols, Words, and Labels
DANGER
DANGER - Immediate hazards which WILL result in severe personal injury or death.
WA RNIN G
WARNING - Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION
CAUTION - Hazards or unsafe practices which COULD result in minor personal injury or product or property
damage.
RS2230003 Rev. 2 4
!
Important Safety Information
CAUTION
Do not become exposed to radiation from the microwave generator or other parts conducting microwave energy .
Basic design of this microwave oven makes it an inherently safe device to both use and service. However, there are some precautions which should be followed when servicing microwave oven to maintain this safety . These are as follows:
1. Always operate unit from an adequately grounded outlet. Do not operate on a two-wire extension cord.
2. Before servicing unit (if unit is operable) perform microwave leakage test.
3. Oven should never be operated if door does not fit properly against seal, hinge/hinge bearings are damaged or broken; choke is damaged, (pieces missing, etc.); or any other visible damage can be noted. Check choke area to ensure that this area is clean and free of all foreign matter. If any above problems occur take the following steps:
• Tell the user not to operate the oven.
• Contact Amana mmediately .
4. If oven operates with door open and produces microwave energy , take the following steps:
• Tell the user not to operate the oven.
• Contact Amana immediately .
5. Always have oven disconnected when outer case is removed except when making "live" tests called for in the service manual. Do not reach into equipment area while unit is energized. Make all connections for the test and check them for tightness before plugging cord into outlet.
6. Always ground capacitors on magnetron filter box and H.V. capacitor with an insulated-handle screwdriver before working in high voltage area of equipment compartment. Some types of failures will leave a charge in capacitors and the discharge could cause a reflex action which could make you injure yourself.
7. In the area of the transformer, capacitor, diode, and magnetron there is HIGH VOLTAGE. When unit is operating, keep area clean and free of anything which could possibly cause an arc or ground, etc.
8. DO NOT for any reason defeat interlock switches, there is no valid reason for this action at any time; nor will it be condoned by Amana.
9. Microwave oven should never be operated with:
• Any components removed and/or bypassed
• Any of the safety interlocks are found to be defective
• Any of the seal surfaces are defective, missing, or damaged
10.To ensure that unit does not emit excessive microwave leakage and to meet Department of Health and Human Services guidelines check oven for microwave leakage using Narda Model 8100, 8200, Holaday HI1500, HI1501, or Simpson 380M leakage monitor as outlined in instructions. Maximum leakage level allowed is 4mw/cm2 .
11.If servicer encounters an emission reading over 4mw/cm2, servicer is to cease repair and contact Amana Service Department immediately for further direction. Amana will contact the proper government agency upon verification of test results.
12.Install or locate this equipment ONL Y in accordance with the installation instructions in this manual.
13.Some products such as whole eggs and sealed containers – for example, closed glass jars – may explode and SHOULD NOT be HEA TED in this equipment.
14.Use this equipment ONL Y for its intended use as described in this manual. Do not use corrosive chemicals or vapors in this equipment. This type of equipment is specifically designed to heat or cook. It is not designed for industrial or laboratory use.
15.As with any equipment, CLOSE SUPERVISION is necessary when used by CHILDREN.
16.DO NOT operate this equipment if it has a damaged cord or plug, if it is not working properly , or if it has been damaged or dropped.
17.This equipment, including power cord, must be serviced ONLY by qualified service personnel. Special tools are required to service equipment. Contact nearest authorized service facility for examination, repair, or adjustment.
18.DO NOT cover or block any openings on the equipment.
19.DO NOT store this equipment outdoors. DO NOT use this product near water – for example, near a kitchen sink, in a wet basement, or near a swimming pool, and the like.
20.DO NOT immerse cord or plug in water.
21.Keep cord AWAY from HEATED surfaces.
22.DO NOT let cord hang over edge of table or counter.
5 RS2230003 Rev. 2
Important Safety Information
!
CAUTION
To avoid personal injury or property damage, observe the following:
1. Briskly stir or pour liquids before heating with microwave energy to prevent spontaneous boiling or eruption. Do not overheat. If air is not mixed into a liquid, liquid can erupt in oven or after removal from oven.
2. Do not deep fat fry in oven. Fat could overheat and be hazardous to handle.
3. Do not cook or reheat eggs in shell or with an unbroken yolk using microwave energy . Pressure may build up and erupt. Pierce yolk with fork or knife before cooking.
4. Pierce skin of potatoes, tomatoes, and similar foods before cooking with microwave energy . When skin is pierced, steam escapes evenly .
5. Do not operate equipment without load or food in oven cavity .
6. Use only popcorn in packages designed and labeled for microwave use. Popping time varies depending on oven wattage. Do not continue to heat after popping has stopped. Popcorn will scorch or burn. Do not leave oven unattended.
7. Do not use regular cooking thermometers in oven. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to oven.
8. Do not heat baby bottles in oven.
9. Do not use metal utensils in oven.
10. Never use paper, plastic, or other combustible materials that are not intended for cooking.
11. When cooking with paper , plastic, or other combustible materials, follow manufacturer's recommendations on product use.
12. Do not use paper towels which contain nylonor other synthetic fibers. Heated synthetics could melt and cause paper to ignite.
13. Do not heat sealed containers or plastic bags in oven. Food or liquid could expand quickly and cause container or bag to break. Pierce or open container or bag before heating.
14. To avoid pacemaker malfunction, consult physician or pacemaker manufacture about effects of microwave energy on pacemaker .
PRECAUTIONS TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWA VE ENERGY
a. 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.
b. DO NOT place any object between the oven front
face and the door or allow soil or cleaner residue to accumulate on sealing surfaces.
RS2230003 Rev. 1 6
c. DO NOT operater the oven if it is damaged. It
particularly important that the oven door close properly and that there is no damage to the: (1) door (bent), (2) hinges and latches (broken or loosened), (3) door seal and sealing surface.
d. The oven should NOT be adjusted or repaired by
anyone except properly qualified service personnel.
!
Important Safety Information
!
Recognize this symbol as a SAFETY message
WARNING
When using electrical equipment, basic safety precautions should be followed to reduce the risk of burns, electrical shock, fire, or injury to persons.
1. READ all instructions before using equipment.
2. READ AND FOLLOW the specific
“PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROW AVE ENERGY”.
3. This equipment MUST BE GROUNDED. Connect only to properly GROUNDED outlet. See “GROUNDING INSTRUCTIONS”.
4. Install or locate this equipment ONL Y in accordance with the installation instructions in this manual.
5. Some products such as whole eggs and sealed containers – for example, closed glass jars – may explode and SHOULD NOT be HEA TED in this oven.
6. Use this equipment ONLY for its intended use as described in this manual. Do not use corrosive chemicals or vapors in this equipment. This type of oven is specifically designed to heat or cook. It is not designed for industrial or laboratory use.
7. As with any equipment, CLOSE SUPERVISION is necessary when used by CHILDREN.
8. DO NOT operate this equipment if it has a damaged cord or plug, if it is not working properly, or if it has been damaged or dropped.
9. This equipment, including power cord, must be serviced ONLY by qualified service personnel. Special tools are required to service equipment. Contact nearest authorized service facility for examination, repair, or adjustment.
10. DO NOT cover or block filter or other openings on equipment.
11. DO NOT store this equipment outdoors. DO NOT use this product near water – for example, near a kitchen sink, in a wet basement, or near a swimming pool, and the like.
12. DO NOT immerse cord or plug in water.
13. Keep cord AWAY from HEA TED surfaces.
14. DO NOT let cord hang over edge of table or counter.
15. See door cleaning instructions in “Care and Cleaning” section.
16. For commercial use only.
CAUTION
To reduce the risk of fire in the oven cavity:
a. DO NOT overcook food. Carefully attend equipment
if paper , plastic, or other combustible materials are placed inside the oven to facilitate cooking.
b. Remove wire twist-ties from paper or plastic bags
before placing bag in oven.
c. KEEP oven DOOR CLOSED, turn oven off, and
disconnect the power cord, or shut off power at the fuse or circuit breaker panel, if materials inside the oven should ignite. Fire may spread if door is opened.
d. DO NOT use the cavity for storage. DO NOT leave
paper products, cooking utensils, or food in the cavity when not in use.
7 RS2230003 Rev. 1
!
Product Information
Antenna Blade
Distributes microwave energy throughout the cavity .
Blower/Fan Assembly
Circulates cooling air throughout the microwave oven compartment and cavity .
Grease Shield
Covers and protects the antenna blade assembly .
Door Interlock and Monitoring Switch
NOTE: When the line fuse is blown the Interlock Switch
Assembly must be replaced.
Interlock switch assembly mounts behind oven cavity front bulkhead. Switches are actuated by the door hooks.
Monitoring switch (contacts COM and NC) is actuated by the top door hook.
The primary interlock switch (contacts COM and NO) is actuated by the top door hook.
The logic switch (contacts COM and NO) is actuated by the bottom door hook.
The secondary interlock switch (contacts COM and NO) is actuated by the bottom door hook.
If a malfunction occurs in the primary interlock when door opens, current will flow through the monitor switch causing the oven fuse to open.
If a faulty door interlock switch has allowed current through the monitor switch, the switch assembly must be replaced (see interlock switch testing) before replacing fuse.
Auto T ransformer
Auto transformer in this unit provides a voltage of 120, 208, or 230 V AC.
Transformer High Voltage
High voltage transformer is used in this unit, which supplies high voltage A.C. for operation of the magnetron tube.
High Voltage Capacitor
Doubles the A.C. output voltage from the high voltage transformer.
High V oltage Diode (Rectifier)
Is connected at the output side of the high voltage capacitor. It changes voltage from A.C. to D.C. It passes current in one direction and blocks it in the other. Also called a rectifier.
Magnetron
With filament voltage and high D.C. voltage from the output of the H.V . capacitor , diode junction, the magnetron will put out an electomagnetic radio frequency of 2450 MHz to heat the food load in the oven.
Thermal Cutout Protectors
At a predetermined temperature, the thermal cut-outs will open.
• Magnetron thermal cut-outs are mounted directly on the body of the magnetron.
• Cavity thermal cut-out is mounted directly on the left side of cavity exterior.
DANGER
T o avoid severe personal injury or death avoid contacting any high voltage parts. The capacitors are at high voltage (4000 volt) potential and it is extremely important that they be grounded before handling.
RS2230003 Rev. 1 8
Touch Panels
Allows consumer operation and programming of oven.
Triac
Triac is controlled by control board. Triac controls one side of the power line going to the high voltage power transformer.
• Triac is mounted inside oven chassis behind oven cavity front bulkhead, towards rear of unit in front of blower motor, underneath insulator .
Stirrer Motor
Stirrer motor rotates top antenna assembly .
Installation
!
Unpacking Oven
• Remove packing and printed material from oven cavity .
• Inspect oven for damage such as dents in door or inside oven cavity .
• Report any dents or breakage to source of purchase immediately. Do not attempt to use oven if damaged.
• If oven has been stored in extermely cold area, wait a few hours before connecting power.
Oven Placement
• Do not install oven next to or above source of heat, such as pizza oven or deep fat fryer. Excessive heat may cause oven to operate improperly and shorten life of electrical parts.
• Restricted air flow may cause oven to operate improperly and shorten life of electrical parts.
• Install according to all local building codes and ordinances.
Radio Interference
Microwave operation may cause interference to radio, television, or similar equipment. Reduce or eliminate interference by doing the following:
• Clean door and sealing surfaces of oven according to instructions in "Care and Cleaning" section.
• Place radio, television, etc. as far as possible from oven.
• Use properly installed antenna on radio, television, etc. to obtain stronger signal reception.
Grounding Instructions
NOTE: Do not under any circumstances cut or remove
grounding prong from the plug or bend power prongs to fit receptacle other than one shown for your equipment. Such abuse of the plug can result in electrical shock or overheating.
WARNING
Improper use of grounding plug can result in a risk of electrical shock or death.
This equipment MUST be grounded. In the event of an electrical short circuit, grounding reduces risk of electric shock by providing an escape wire for electric current. This oven is equipped with a cord having grounding wire with a grounding plug. Plug must be plugged into an outlet that is properly installed and grounded. DO NOT use a two-prong adapter .
Consult a qualified electrician or servicer if grounding instructions are not completely understood, or if doubt exists as to whether the equipment is properly grounded.
Do not use an extension cord. If product power cord is too short, have a qualified electrician install an appropriate receptacle. This equipment should be plugged into a separate 60 Hz circuit with the appropriate electrical rating as shown in the drawings. When an oven is on a circuit with other equipment, an increase in cooking times may be required and fuses can be blown.
NEMA 5-20R/5-20P
120V–20AMP
9 RS2230003 Rev. 1
NEMA 6-20R/6-20P 230V/208V–20AMP
Care and Cleaning
!
!
!
Changing Oven Light Bulb
CAUTION
T o avoid electrical shock hazard unplug power cord or open circuit breaker to microwave oven before replacing light bulb. After replacing light bulb, reconnect power .
CAUTION
T o avoid burns and cuts, wear gloves to protect hands should bulb break. If hot, allow bulb to cool.
Tools and Bulb
• Protective gloves
• Standard screwdriver or ¼ inch socket
• Light bulb rated 120 volt, 25 watt
1. Unplug oven.
2. Remove screws from back of oven and remove access cover.
• See figure below .
4. Remove bulb by turning counterclockwise, being careful not to burn fingers or break bulb.
• Replace with bulb rated 120 volt, 25 watt.
5. Slide rail into oven cavity, replace access cover and screws. When installing screws attach rail to access cover first, for easier installation.
6. Plug in oven.
Cleaning Interior , Exterior, and Door
WARNING
T o avoid electrical shock which can cause severe personal injury or death, unplug power cord or open circuit breaker to oven before cleaning.
Clean microwave oven with mild detergent in warm water using soft sponge or cloth. Wring sponge or cloth to remove excess water before wiping equipment. If desired, boil a cup of water in microwave oven to loosen soil before cleaning.
• Do not use abrasive cleansers or cleaners containing
ammonia. These could damage finish.
• Never pour water into microwave oven bottom.
• Do not use water pressure type cleaning systems.
3. Slide rail out oven from oven cavity.
• See figure below .
RS2230003 Rev. 1 10
Cleaning Splatter Shield
Splatter shield keeps top of microwave oven cavity and antenna from becoming soiled. Clean soil from shield with damp cloth or clean with mild detergent and water .
Remove splatter shield for easy cleaning.
1. Unplug oven before removing splatter shield to stop antenna from rotating.
2. Place fingers behind shield, pull forward, and down.
• When removing and replacing splatter shield, be careful not to bend antenna.
!
!
Care and Cleaning
3. Wash shield in hot, soapy water . Rinse and dry thoroughly .
• Do not wash splatter shield in dishwasher.
• Do not use abrasive cleaners.
4. Reinstall splatter shield by placing front portion of the shield in first. Lift until shield slides into holes located in back of oven.
Correct Installation
CAUTION
T o avoid oven door damage, do not lift oven by oven door.
Filter is located below oven door . Clean air intake filter weekly for proper air flow. W ash filter in hot water and mild detergent. Do not use oven without filter in place. Remove filter to clean.
Method 1
1. Open oven door and lift front of oven by pushing up on front of oven cavity ceiling.
2. Slide filter down and out of oven frame.
• Pull down on corners of filter.
3. Reverse procedure to reinstall.
Incorrect Installation (Shield in upside down)
NOTE: If splatter shield is installed upside down, shield
will interfere with antenna movement.
Cleaning Air Intake Filter
Method 2
1. Slide filter to left or right until side of filter frame clears oven frame.
2. Pull side of filter frame out of oven frame and slide right or left until clear of oven.
3. Reverse procedure to reinstall.
Cleaning Discharge Air V ents
Check for a buildup of cooking vapors along discharge louvers in back of oven. Clean air vent with damp cloth to ensure proper airflow . Dry thoroughly.
CAUTION
T o avoid overheating and oven damage, clean air filter regularly.
11 RS2230003 Rev. 1
Discharge air vent
Loading...
+ 24 hidden pages