Amana HDC12, HDC21, HDC10, HDC18, CRC21T2RL User Manual

...

Service

Commercial Microwave Oven

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:

CRC18T2OG P1323006M, P1323015M CRC21T2RL P1323007M, P1323017M HDC10 P1323008M HDC12 P1323009M HDC18 P1323003M, P1323013M HDC18SD P1323004M, P1323014M HDC21 P1323005M, P1323016M

Service Manual for Amana

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.

RS2240002

Revision 1

October 2000

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.

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.

WA RNING

To avoid risk of electrical shock, injury, or death, make sure these grounding instructions are followed.

Grounding Instructions

WA RNIN 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.

RS2240002 Rev. 1 2

Table of Contents

Important Product Information ..................................... 2

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 Cutout Protectors....................................... 8

T ouch Panels........................................................... 8

Triac ........................................................................ 8

Antenna Motor(s) ..................................................... 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 Panel Features ............................................. 1 2

Displays

Cooking Methods................................................... 13

Cooking Displays................................................... 13

Programming Displays........................................... 13

Operation

Interrupting Operation ............................................ 1 4

Canceling Mistakes ............................................... 14

Operating Preprogrammed Pads............................ 14

Using X2 Pad......................................................... 1 4

Manual Time Entry ................................................ 14

Programming Instructions

Memory Pads ........................................................ 15

Multiple Cooking Stages ........................................ 1 5

X2 Quantity Feature ............................................... 15

User Options ......................................................... 16

Component T esting Procedures ................................ 17

T est Modes

Power T est............................................................. 21

Microwave Energy Leakage T esting

Equipmen t ............................................................. 2 2

Procedure for Measuring Radiation Leakage.......... 22

Measurement With the Outer Case Removed ........ 22

Measurement With a Fully Assembled Oven ......... 22

Record Keeping and Notification

After Measurement ................................................ 22

Troubleshooting

Initial Power Up .................................................. 23

Standby Condition .............................................. 24

Cook Condition................................................... 25

Disassembly

Door Removal ........................................................ 26

Inner Door/Window Removal .................................. 26

Door Disassembly ................................................. 2 6

Door Handle........................................................... 26

Hinge ..................................................................... 26

Interlock Switch Assembly .................................... 27

Switch Replacement / Door Adjustment ................ 28

Outer Case ............................................................ 29

Back Panel............................................................ 29

Grease Shield........................................................ 29

Antenna Assembly–T op......................................... 29

Antenna Motor–T op................................................ 29

Oven Tray Removal ................................................ 29

Antenna Assembly–Bottom ................................... 29

Antenna Motor–Bottom.......................................... 30

T ouch Panel Assembly.......................................... 3 0

Control Board ........................................................ 30

Interlock Switch Assembly .................................... 30

Magnetron Cutout (TCO) ........................................ 3 0

Triac ...................................................................... 30

Diodes ................................................................... 30

Magnetron ............................................................. 30

Cavity Thermal Cutout Replacement ...................... 3 1

Fuse ...................................................................... 31

Blower Wheel and Motor........................................ 31

Fan Blade .............................................................. 3 1

Auto Transformer ................................................... 31

High Voltage T ransformer ....................................... 3 2

Capacitor ............................................................... 3 2

Power Cord............................................................ 32

Lamp Receptacle................................................... 32

Replacing Oven Lamp ............................................ 3 2

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 RS2240002 Rev. 1

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.

RS2240002 Rev. 1 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:

• T ell the user not to operate the oven.

• Contact Amana immediately.

4. If oven operates with door open and produces microwave energy , take the following steps:

• T ell 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 VOL T AGE. 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 .

1 1.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 ONLY 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 ONLY 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 ONL Y 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 AWA Y from HEATED surfaces.

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

5 RS2240002 Rev. 1

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.

RS2240002 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 A VOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWA VE 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 AWA Y 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 RS2240002 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 open, 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, inside the exhaust duct.

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.

RS2240002 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 on blower bracket.

Antenna Motor(s)

Antenna motor(s) rotate(s) antenna assemblies.

Installation

Unpacking Oven

• Remove packing and printed material from ovencavity .

• 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. This could cause microwave oven to operate improperly and could shorten life of electrical parts.

• Do not block or obstruct oven filter. Allow access for cleaning.

• Install oven on level countertop surface.

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.

A—Allow at least 7" (17.8 cm) of clearance around top

and sides of oven. Proper air flow around oven cools electrical components. With restricted air flow, oven may not operate properly and life of electrical parts is reduced.

B—Allow at least 2 9/16" (6.5 cm) between air discharge

on back of oven and back wall.

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.

Model NEMA

Designation

HDC10 HDC12

NEMA

5-20R/5-20P

120V-20AMP

Receptacle and Plug

HDC18 HDC18SD HDC21

9 RS2240002 Rev. 1

NEMA

6-20R/6-20P

250V-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 screw from side of oven and remove access cover.

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.

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.

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.

3. Remove bulb by turning counterclockwise, being careful not to burn fingers or break bulb.

• Replace with bulb rated 120 volt, 25 watt.

5. Reverse procedure to reassemble.

RS2240002 Rev. 1 10

Correct Installation

Care and Cleaning

Incorrect Installation (Shield in upside down)

NOTE: If splatter shield is installed upside down, shield

will interfere with antenna movement.

Cleaning Air Intake Filter

To replace filter

• Place bottom portion of filter into position first and push in on the top portion of the filter, until filter is securely in place.

NOTE: When placing filter back into position, verify

plastic tab is on the outside of the unit.

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.

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.

To remove filter

• Locate plastic tab in the center of filter and pull downward (rolling the filter), to release filter from metal holding tabs.

Plastic

Discharge air vent

tab

11 RS2240002 Rev. 1

Control Panel Features

TIME ENTRY pad is used to enter cooking time for

either manual entry or programming. Cooking time ranges from 1 second (00:01) to a total of 60 minutes (60:00) over four stages. If more than 60 minutes of total microwave cooking time is required, open door and inspect food before beginning new cooking cycle.

X2 pad increases the cooking time when cooking more than one item at a time is necessary . The amount of added time when the X2 pad is pressed is a percent of the original preprogrammed cooking time. The percent can be set from 10% to 100% with the default at 80%. The percent of the time added can be changed for individual cooking sequences.

Numbered pads begin cooking programs or enter times and power levels for “Manual Time Entry” cooking.

ST ART pad begins Manual T ime Entry cooking or restarts an interrupted cooking cycle. When programming, use to save time and power level, and to advance to next user option.

STOP/ RESET pad exits programming mode and stop cooking during cooking cycle.

MICRO DEFR WARM MEDHI POWER HOLD

COOK LEVEL

TIMER READY CLOCK

DisplaySome items in display can be seen but will not glow.

Stages

This oven can be programmed to run 4 cooking sequences consecutively . Each sequence is called a stage. For example, the first cycle could be programmed to defrost at 60% power, the second to defrost at 30% power, the third to heat at 100% power , and the fourth to hold warm at 10% power. Total time for all cooking stages counts down.

POWER LEVEL pad is used to set microwave power level. When cooking, the power level can be decreased for foods that require slower more even cooking. Microwave power levels range from 0% to 100% in 10% increments. If cooking time is set and ST ART pad pressed, oven cooks at 100% power. When programming, to reset power level to 100%, press POWER LEVEL pad.

RS2240002 Rev . 1 12

User Options

User Options allow the user to program the oven to perform in a way convenient to the user . The beeps, maximum cooking time, and number of preprogrammed cooking sequences can be changed.

Displays

Cooking Methods

Memory Pads

This oven can of store either 10 or 100 cooking programs in memory .

Single Pad Cooking

From the factory , it is programmed to store 10 cooking programs. Each pad begins a cooking program.

Double Pad Cooking

The oven control can be changed to store up to 100 cooking programs. T o set the control to 100 cooking programs, see the “User’s Options” section of this manual. T o heat when the oven is set for 100 programs , press 2 memory pads. For example, to start the first program, press pad 0, then pad 1. T o use the second program, press pad 0, then pad 2. After the pads are pressed, the oven starts automatically and time counts down.

Manual Time Entry

Manual Time Entry feature allows the operator to heat without changing the preprogrammed pads. Time must be entered and power can be set before cooking. ST ART pad must be pressed to begin cooking.

Programming Displays

MICRO DEFR WARM MEDHI POWER HOLD

This display indicates oven is in programming mode and ready to program a numbered pad(s).

MICRO DEFR WARM MEDHI POWER HOLD

This display indicates oven is set to double pad entry and 2 pads must be pressed to enter a program. See “Programming” section of manual for programming procedure or “User Options” to change from single or double pad entry .

MICRO DEFR WARM MEDHI POWER HOLD

COOK LEVEL

TIMER READY CLOCK

Cooking Displays

MICRO DEFR WARM MEDHI POWER HOLD

READY shows when oven control will accept entries.

MICRO DEFR WARM MEDHI POWER HOLD

25:20 shows cooking time. When more than one cooking stage is programmed, total time for all stages displays. POWER Shows when microwave energy is generated. COOK LEVEL shows when oven is operating. 8 indicates the microwave power level used. If number does not show, oven is cooking at 100% power .

COOK LEVEL

TIMER

READY

CLOCK

TIMER READY CLOCK

This display shows briefly when programming more than one stage. It indicates programming mode for pad 02. The smaller “1” indicates stage 1 is being programmed.

MICRO DEFR WARM MEDHI POWER HOLD

COOK LEVEL

TIMER READY CLOCK

This display indicates programming user options mode. See “User Options” section of manual for programming procedure.

MICRO DEFR WARM MEDHI POWER HOLD

COOK LEVEL

TIMER READY CLOCK

This display indicates cooking factor of 80% when X2 pad is pressed.

13 RS2240002 Rev . 1

Operation

Interrupting Operation

Open oven door or press operation. Display continues to show countdown time. Close door and press operation.

STOP/RESET

ST ART

pad to resume oven

pad to interrupt

Canceling Mistakes

If oven is not cooking, press display . If oven is cooking, press once to stop oven, then again to clear display . If oven door is open and time shows in display, close oven door and press

STOP/RESET

pad to clear

STOP/RESET

pad to clear display .

pad

Operating Preprogrammed Pads

From the factory , this oven can of store up to 10 preprogrammed cooking sequences in memory . To heat using a preprogrammed sequence, press a numbered pad. Oven starts to heat automatically . Example: Heat using the third cooking sequence.

1. Open oven door, place food in oven, and close oven door.

• Display shows “READY”.

• If pad is not pressed in 60 seconds, open and

close oven door again.

2. Press 3 pad.

• Oven operates and time counts down.

• Display shows cooking time, “POWER”, ”COOK

LEVEL”. Display shows “POWER” only when microwave energy is present.

• If power level other than 100 percent power was

programmed, display shows “COOK LEVEL” and power level.

• If additional cooking time is required, press

preprogrammed pads before or after cooking cycle ends.

3. Oven stops cooking and oven signal sounds when cooking timing elapses.

Preprogrammed Times and Cook Level

All preprogrammed pads arrive set at full power.

Pads Times Pads Times

1 10 sec . 6 1:30 min. 2 20 sec. 7 2 min. 3 30 sec. 8 3 min. 4 45 sec. 9 4 min. 5 1 min. 0 5 min.

Double Pad Programs

The oven control can be changed to store up to 100 cooking programs. See the “User’s Options” section of this manual to change oven control.

T o start a double pad cooking program, press 2 memory pads. For example, press pad 0 and pad 3 to start a cooking program.

Using X2 Pad

Press X2 pad before pressing memory pad. For example, press X2 pad and then memory pad 3. Pad 3 normally cooks for 30 seconds. When the X2 pad is pressed before memory pad 3, 54 seconds displays because it added 24 seconds, (80% of 30 sec. =24 sec.).

Manual Time Entry

Manual Time Entry feature allows the operator to enter time and power levels, and heat without changing the preprogrammed pads. Example: Heat for 30 seconds at 80% power.

1. Open oven door, place food in oven, and close door .

• Display shows “READY”. Fan and light operate.

• If pad is not pressed in 60 seconds, open and close oven door again.

2. Press TIME ENTRY pad.

• Display shows “0000” and “READY”.

3. Press 3 and 0 pad to enter cooking time.

4. Press POWER LEVEL pad to change power level.

• Display shows “COOK LEVEL” and current power level if other than 100 percent power.

5. Press 8 pad to enter desired power level.

6. Press STAR T pad.

• Oven operates and time counts down.

• Display shows cooking time, “POWER”, “COOK LEVEL”.

• Display shows “POWER” only when microwave energy is present.

• If power level other than 100 percent power was programmed, display shows “COOK LEVEL” and power level. Display counts down cooking time.

7. Oven stops cooking and oven signal sounds when cooking timing elapses.

RS2240002 Rev . 1 14

Programming Instructions

Memory Pads

From the factory , this oven can of store up to 10 cooking programs. Follow instructions below to program cooking times and power levels for customized cooking. Example: Program third cooking sequence to heat for 30 seconds at 80% power.

1. Open oven door.

• Display shows “READY”.

• If door is closed or RESET pad is pressed before finishing programming sequence, oven exits programming mode.

2. Press and hold pad 1 for approximately 5 seconds.

• After 5 seconds, signal sounds. Display shows “P:0”.

3. Press 3 pad to select memory pad.

• Display shows cooking time, “COOK LEVEL” and power level if other than 100 percent power.

4. Press 3 and 0 pad to enter desired cooking time.

5. Press POWER LEVEL pad to change power level.

• Display shows “COOK LEVEL” and current power level if other than 100 percent power.

6. Press 8 pad to enter desired power level.

7. Press ST ART pad to save new cooking time and power level in oven memory.

• Display shows “P:0”.

• Repeat step 3–8 to program additional pads.

8. Press STOP/RESET pad or close oven door to exit programming mode.

Double Pad Programs

The oven control can be changed to store up to 100 cooking programs. See the “User’s Options” section of this manual to change oven control.

T o create a double pad program, follow the instructions above except for a change to step #3. When entering the cooking program number, press 2 memory pads. For example, press pads 0 and pad 3 to create a new cooking program.

Multiple Cooking Stages

Follow instructions below to program oven to perform four consecutive cooking cycles without interruption. Example: Program third cooking sequence to heat for 30 seconds at 80% power, 40 seconds at 50% power , and 10 seconds at 100% power.

1. Open oven door.

• Display shows “READY”.

• If door is closed or RESET pad is pressed before

finishing programming sequence, oven exits programming mode.

2. Press pad 1 for approximately 5 seconds.

• After 5 seconds, signal sounds. Display shows

“P:0”.

4. Press 3 pad to select memory pad.

• Display shows cooking time, “COOK LEVEL” and

power level if other than 100 percent power.

5. Press 3 and 0 to enter desired cooking time.

6. Press POWER LEVEL pad to change power level.

• Display shows “COOK LEVEL” and current power level if other than 100 percent power.

7. Press 8 pad to enter desired power level.

8. Press TIME ENTRY pad.

• Display briefly shows "P:03 programming, pad 3, stage 2. Then cook time and power level for stage show in display .

• Repeat steps 5–8 to create additional stages.

9. Press ST ART pad to save new cooking time and power level in oven memory .

10.Press STOP/RESET pad or close oven door to exit programming mode.

(1-4)

" indicating

X2 Quantity Feature

This feature allows the user to change the amount of time added when the X2 pad and then the programmed pad is pressed. Based on the original time, the X2 pad can add from 10%-100% of additional cooking time. The default is 80%. Example: change cooking factor to 50% for third cooking sequence.

1. Open oven door.

• If door is closed or

finishing programming sequence, oven exits programming mode.

2. Press and hold pad 1 for approximately 5 seconds.

• After 5 seconds, signal sounds. Display shows

“P:--”.

3. Press 3 pad to select the cooking program.

4. Press 5 pad to change cooking factor.

• Display shows “CF:05”.

5. Press ST ART pad to save changes.

6. Press STOP/RESET pad or close oven door to exit programming mode.

Double Pad Programs

The oven control can be changed to store up to 100 cooking programs. See the “User’s Options” section of this manual to change oven control.

T o change the quantity for a double pad program, follow the instructions above except for a change to step #3. When entering the cooking program number , press 2 memory pads. For example, press pads 0 and pad 3 to create a new cooking program. After the program is saved, press pad 0 and pad 3 to start a cooking program.

RESET

pad is pressed before

15 RS2240002 Rev . 1

Programming Instructions

User Options

Follow the instructions below to customized the microwave oven’s operation. End-of-cycle signal, maximum cooking time and other options can be changed to meeting your cooking needs. Example: Change setting to single digit pad operation.

1. Open oven door.

• If door is closed or finishing programming sequence, oven exits programming mode.

2. Press and hold pad 2 for approximately 5 seconds.

• After 5 seconds, signal sounds. Display shows “0P:”.

Numbered Pads Display Options (Factory Settings in Bold)

End of Cycle Beep

Speaker Volume

Key Beep

Keyboard Enable

Window

Add Time during

Heating

Reset Door Open

Maximum Heating

Time

RESET

OP:10 OP:11 OP:12 OP:20 OP:21 OP:22 OP:23 OP:30 OP:31 OP:40 OP:41 OP:42 OP:43 OP:50 OP:51

OP:60

OP:61 OP:70 OP:71

pad is pressed before

3 second continuous beep.

Continuous beep until door is opened. 5 beeps bursts until door is opened. Eliminates beep. Sets volume to low.

Sets volume to medium.

Sets volume to high. Prevents beep when pad is pressed.

Allows beep when pad is pressed.

15 seconds after oven door is opened, keyboard disabled. 30 seconds after oven door is opened, keyboard disabled.

1 minute after oven door is opened, keyboard disabled.

2 minutes after oven door is opened, k eybo ar d dis abled. Prevents adding heating time while oven is heating.

Allows he a t i ng time to be chang e d whi le ov e n is he a t i ng when a memory pad is pressed.

Allows oven to resume heating time countdown after door is opened during cycle.

Cancels heating time countdown after door is opened during cycle.

Allows 60 minutes of heating time.

Allows 10 minutes of heating time.

3. Press 9 pad.

• See table for options.

• Displays shows “OP:91”.

• “OP” represents optional program mode, first number represents option number and second number represents functions currently selected for option.

4. Press 9 pad repeatedly to change setting.

5. Press ST ART pad to save changes.

• Repeat steps 3-5 to change additional options.

• Changes appear after door is closed or STOP/ RESET is pressed.

6. Press STOP/RESET pad or close oven door to exit programming mode.

Manual Operation

Double Digit

Operation

RS2240002 Rev . 1 16

OP:80 OP:81 OP:90 OP:91

Allows use of preprogrammed pads only.

Allows use of manual time entry and preprogrammed pads. Allows 10 (0-9) preprogrammed pads.

Allows 100 (00-99) preprogrammed pads.

Component Testing Procedures

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor before servicing, unless testing requires it.

Illustration Component Testing Results

Thermal Cutout Disconnect all wires from TCO.

Diode Assembly

Measure resistance across terminals. Cavity Thermal Fuse Magnetron TCO

Discharge Capacitors

Remove diode lead from capacitor and connect ohmmeter.

Reverse leads for second test.

Open at 219°F (104°C) Open at 280°F (138°C) and closed at 180°F (82°C) Infinite resistance should be measured in one direction and 50K or more in the opposite direction.

NOTE:

Analog meter must contain a

battery of 6 volts minimum.

Ω

Triac Disconnect wires to triac.

MT2

MT1 GATE

Capacitor

Snubber Assembly Disconnect wires to snubber.

Magnetron

Blower Motor Remove all wires from motor.

Measure resistance from: MT1 to MT2 MT1 to Gate MT2 to Gate All terminals to ground

Discharge Capacitors

Remove wires from capacitor terminals and connect ohmmeter, set on highest resistance scale to terminals.

Also check between each terminal and capacitor case.

Measure resistance across terminals. Infinite

Discharge Capacitors

Remove wires from magnetron and connect ohmmeter to terminals. Also check between each terminal and ground.

Caution - Do not operate oven with wire to terminal MT2 removed.

Infinite Approximately 40 Ω or more Infinite Infinite

Between Terminals: Meter should momentarily deflect towards zero then return to over 5 MΩ. IF no deflection occurs, or if continuous deflection occurs, replace capacitor.

Terminal to Case: Infinite resistance

Between Terminals: Less than 1 Each terminal to ground measures

Infinite resistance.

Note:

This test is not conclusive. If oven does not heat and all other components test good replace the magnetron and retest.

Ω

Measure resistance across coil.

Antenna motor Remove all wires from motor.

Auto Transformer

230

COM

120

Wire Harness Test continuity of wires. Indicates continuity

208

230

208

120

Discharge Capacitors

Remove all wires from terminals. Measure resistance from:

230 to 0 208 to 0 120 to 0

RS2240002 Rev. 1 17

Measure resistance across terminals.

Approximately 30

Circuitry 120 VACApproximately 3.4 K 230 VACApproximately 12 K

42.4

Ω

38.6

Ω

21.5

Ω

Component Testing Procedures

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor before servicing, unless testing requires it.

Illustration Component Testing Results

Transformer

# 4

# 1 # 3

# 2 # 5

# 6 # 7 # 8

1.0 F

HDC21, HDC18SD, HDC18 CRC18T2OG CRC21T2RL

Transformer

1.0 F

-300 MA

Discharge Capacitors

Remove all wires from terminals. Measure resistance from: Terminal 1 to 2 Terminal 1 to 3 Terminal 5 to 6 Terminal 7 to 8 Terminal 4 to Ground screw on transformer Terminal 4 to any other terminal

Violet

Gray

Red

Discharge Capacitor

Remove all wires from terminals, and

measure resistance from: Terminal 1 to 2 Terminal 5 to 6

Terminal 4 to Ground screw on transformer Terminal 4 to any other terminal

Gray Red

1.0

Ω

Less than 1 Less than 1 Less than 1 30

Ω

Ω Ω Ω

Infinite resistance should be indicated, if not replace transformer.

Less than 1 Less than 1 78

Ω

Ω Ω

Infinite resistance should be indicated, if not replace transformer.

12136102

−

HDC10

−

HDC12

Terminal 1− 230 V Terminal 2− Common Terminal 3−208 V

10426609 10426610

Terminal 1−120 V Terminal 2−Common

R0150154

Monitor

Primary

Logic

Secondary

12538901Q

Monitor

Primary / Logic

Seconda ry

Interlock switch assembly

Door Closed

Primary / Logic

Monitor

Secondary

C C

Disconnect wires to switch. With door open measure resistance from:

Terminal C to NC Monitor Terminal C to NO Primary Terminal C to NO Logic Terminal C to NO Secondary

With door closed measure resistance from: Terminal C to NC Monitor Terminal C to NO Primary Terminal C to NO Logic Terminal C to NO Secondary

Door Closed

NO NO NO

Monitor Primary

Logic Secondary

C C C C

Disconnect wires to switch. With door open measure resistance from:

Terminal C to NC Monitor Terminal C to NO Primary Terminal C to NO Logic

Terminal C to NO Secondary

With door closed measure resistance from:

Terminal C to NC Monitor Terminal C to NO Primary Terminal C to NO Logic Terminal C to NO Secondary

Indicates continuity Infinite Infinite Infinite

Infinite Indicates continuity Indicates continuity Indicates continuity

Indicates continuity Infinite Infinite Infinite

Infinite Indicates continuity Indicates continuity Indicates continuity

RS2240002 Rev. 118

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