Amana Menumaster ACE208D2 Service Manual

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Service

Commercial Combination/ Convection Microwave Oven with 230/208 V, 60 Hz

This Base Manual covers all

Commerical Combination/Convection

Microwave Ovens with 230/208 V , 60 Hz.

Refer to individual T echnical Sheet for information on specific models.

ACE208 ACE230

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.

RS2220002

Revision 0

November 2000

Important Product Information

WA R N IN G

Precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy , or electrical shock disconnect power to oven.

Do not operate or allow oven to be operated with door open.

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

Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, waveguide or transmission line, and cavity for proper alignment, integrity , and connections.

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 .

Check microwave leakage to verify compliance with the federal performance standard should be performed on each oven prior to release to the consumer.

WA RNING

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.

RS2220002 Rev. 0 2

Table of Contents

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

Impo rtant I nform ation ....................................................4

Important Safety Information .........................................5

Product Information

Strirrer Blade ..........................................................7

Blower/Fan Assembly ............................................7

Stirrer Cover ...........................................................7

Door Interlock and Monitoring Switch .....................7

Transformer High V oltage........................................7

High V oltage Capacitor ...........................................7

High Voltage Diode (Rectifier).................................7

Magnetron ..............................................................7

Thermal Protectors .................................................7

T ouch Panels..........................................................7

Triacs .....................................................................7

RTD (Resistive Thermal Device)..............................7

Heating Elements...................................................7

Installation

Grounding Instructions............................................8

Unpacking Oven .....................................................8

Radio Interference...................................................8

Oven Placement .....................................................8

Care and Cleaning

Recommended Maintainence Schedule..................9

Recommended Cleaning Schedule .........................9

Cleaning Oven Exterior ...........................................9

Cleaning Oven Cavity ..............................................9

Oven Racks and Rack Guides................................9

Air Filter .................................................................9

Discharge Air Vents................................................9

Display and Features ..................................................10

Programming

Programming Pads...............................................13

Programming Multiple Stages ..............................13

Programming Preheat Setting ..............................13

Convection Cooking

Convection Cooking with Programmed Pads ........14

Convection Cooking Using Manual Time Entry ..... 1 4

Combination Cooking(microwave and convection)

Combination Cooking with Preprogrammed Pads .15

Using Maunal Time Entry .....................................15

Combination Cooking ...........................................15

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

User Maintenance

Replacing Oven Light............................................ 1 7

Moving Oven Rack Guides....................................17

Service Codes ...................................................... 1 7

Specifications .............................................................18

Component T esting Procedures ..................................19

T est Modes

Microwave Power T est ..........................................23

T emperature Chart ................................................23

Convection T emperature T est................................24

Convection T emperature Calibration......................24

Radiation Leakage Testing ..........................................25

Equipmen t............................................................ 2 5

Procedure For Measuring Radiation Leakage .......25

Measurement With the Outer Panel Removed......25

Measurement With a Fully Assembled Oven........ 2 5

Record Keeping and

Notification After Measurement ............................25

Display Diagnostics

Error Codes ..........................................................26

Service T est ................................................................27

Troubleshooting

Power up .............................................................. 2 9

Preheat/Convection Condition...............................29

Microwave Condition .............................................30

Disassembly

Door Handle .........................................................31

Outer Door............................................................ 3 1

Inner Door Assembly ............................................31

Hinge ....................................................................31

Outer Case........................................................... 32

Back Panel ..........................................................32

Stirrer Cover .........................................................32

RTD (Resistance Thermal Device) ........................ 3 2

T op Touch Panel Assembly ..................................32

Side Touch Panel Assembly.................................33

High Voltage Circuit Board ................................... 3 3

Interlock Switch Module .......................................33

Adjustment ....................................................33

Display Module..................................................... 3 4

Magnetron ............................................................34

Magnetron, Control, and

Fan Thermal Cutout (TCO)....................................34

Triacs ...................................................................34

Microwave Blower Wheel and Motor .....................34

Fan Blade.............................................................35

Transformer .......................................................... 3 5

Capacitor..............................................................35

Heater Box ...........................................................35

Heating Elements................................................. 35

Convection Fan and Motor ....................................35

Fuse .....................................................................35

Power Cord ..........................................................36

Light Socket .........................................................36

Replacing Oven Light Bulb ...................................36

Component Location ...................................................37

Amana • 2800 220thTrail • PO Box 8901 • Amana, Iowa • 52204 • Printed in the U.S.A.

3 RS2220002 Rev. 0

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 personal, 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 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.

RS2220002 Rev. 0 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 RS2220002 Rev. 0

Important Safety Information

CAUTION

To avoid risk of personal injury or death of fire in the oven cavity:

• DO NOT overcook food. Carefully attend equipment if paper, plastic, or other combustible materials are placed inside the equipment to facilitate cooking.

• Remove wire twist-ties from paper or plastic bags before placing bag in equipment.

• KEEP equipment DOOR CLOSED, turn equipment off, and disconnect the power cord, or shut off power at the fuse or circuit breaker panel, if materials inside the equipment should ignite. Fire may spread if door is opened.

• DO NOT use the cavity for storage purposes. DO NOT leave paper products, cooking utensils, or food in the cavity when not in use.

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 equipment or after removal from equipment.

2. Do not deep fat fry in equipment. 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. Pop popcorn in microwave mode only. If equipment is preheated or hot, allow equipment to cool before popping popcorn or bag may ignite.

7. Do not use regular cooking thermometers in equipment when cooking in microwave or combination mode. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to equipment.

8. Do not heat baby bottles in equipment.

9. Do not use metal utensils in equipment except when recommended by microwave food manufacturers or recipe requires metal utensils in convection or combination mode. Heat food in containers made of glass or china if possible.

10. Never use paper, plastic, or other combustible materials that are not intended for cooking. If equipment temperature is high, material may ignite.

12. Do not use paper towels which contain nylon or other synthetic fibers. Heated synthetics could melt and cause paper to ignite.

13. Do not heat sealed containers or plastic bags in equipment. Food or liquid could expand quickly and cause container or bag to break. Pierce or open container or bag before heating.

14. Racks, utensils, and equipment surfaces may become hot during or after use. Use utensils or protective clothing, like pan grips or dry oven mitts, when necessary to avoid burns.

15. Do not use rack position if rack hook breaks. Replace broken hooks immediately.

16. Do not unplug equipment immediately after use. Internal fan must cool equipment to avoid damage of electrical components.

RS2220002 Rev. 0 6

Product Information

Stirrer Blade

Distributes microwave energy throughout the cavity.

Blower/Fan Assembly

Circulates cooling air throughout the convection or microwave oven compartment and cavity .

Transformer High Voltage

High voltage transformer is used in this unit, which supplies high voltage A.C. for operation of the magnetron tube.

Stirrer Cover

Covers and protects the stirrer 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. It is actuated by door hook and guide attached to the door.

Monitoring switch (contacts 7 and 8) is actuated by the door guide.

The secondary interlock switch (contacts 2 and 3) and primary interlock switch (contacts 4 and 5) are actuated by the door hook.

The secondary interlock switch is in series with the interlock monitoring switch in the monitor circuit.

If a malfunction occurs in the secondary 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.

DANGER

To 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.

High Voltage Capacitor

Doubles the A.C. output voltage from the high voltage transformer.

High Voltage 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 Protectors

At a predetermined temperature the thermal cut-outs will open or close. The oven will indicate an error code in the display , initiate cooling fan operation, or prevent the generation of microwave energy .

• Magnetron thermal cut-out is mounted directly on the body of the magnetron

• Fan thermal cut-out is mounted directly on the exhaust duct

• Control thermal cut-out is mounted directly on the heater box

Touch Panels

Allows consumer operation and programming of oven.

Triacs

Triacs are controlled by high voltage circuit boards. Triacs control one side of the power line going to the high voltage power transformer and heating elements.

• Microwave triacs, heating elements A, and B triacs are mounted inside oven chassis behind oven cavity front bulkhead

RTD (Resistance Thermal Device)

Senses temperature inside oven cavity.

Heating Elements

Heating elements are used to produce convection heat.

7 RS2220002 Rev. 0

Installation

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.

WA R N IN G

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 label. Models ACE208 require a 208 voltage supply and model ACE230 requires a 230/240 voltage supply. When the combination oven is on a circuit with other equipment, an increase in cooking times may be required and fuses can be blown.

Radio Interference

Microwave operation may cause interference to radio, television, or a similar oven. Reduce or eliminate interference by doing the following:

• Clean door and sealing surfaces of oven according to instructions in

Care and Cleaning

• Place radio, television, etc. as far as possible from oven.

• Use a properly installed antenna on radio, television, etc. to obtain stronger signal reception.

section.

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.

• Place warning label in a conspicuous place close to microwave oven.

• Outlet should be located so that plug is accessible when oven is in place.

NEMA 6-20R

250V–20AMP

Unpacking Oven

• 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.

• Remove all materials from oven interior.

• If oven has been stored in extremely cold area, wait a few hours before connecting power .

RS2220002 Rev. 0 8

A—Allow at least 1 1/4" (3.18 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—Install combination oven so oven bottom is at

least 3 feet (91.5 cm) above floor .

Care and Cleaning

Clean oven frequently to maximize oven life, performance, and efficiency . A dirty oven cooks inefficiently because moisture, spills, and grease absorb convection and microwave energy .

• Do not use harsh or abrasive cleaners, or cleaners containing ammonia.

• Do not use water pressure type cleaning systems.

• Remove excess water from cloth before wiping oven.

WARNING

To avoid electrical shock which can cause severe personal injury or death, disconnect power to appliance before cleaning.

CAUTION

To prevent personal injury, handle utensils, racks, and door with care. Utensils, racks, and door may become hot during operation.

Recommended Maintenance Schedule

Schedule Maintenance Cleaning (Not Covered Under Warranty)

• Contact an authorized servicer to remove and clean heater box.

• Schedule appointment every 12 months or when heavy grease buildup is apparent on back of oven cavity .

Recommended Cleaning Schedule

Schedule Several Daily Cleanings

• Clean interior, exterior , door, and racks according to instructions.

• If possible, clean spills immediately.

• Clean air filter and air vents regularly to prevent overheating.

• Wipe dry after cleaning.

Clean After Use

• Remove oven racks and rack guides, and clean according to Oven Racks and Rack Guides instructions.

• Clean exterior according to Cleaning Oven Exterior instructions.

• Clean oven cavity according to Cleaning Oven Cavity instructions.

• Wipe dry after cleaning.

Cleaning Oven Exterior

Clean door and other exterior surfaces with a clean cloth, sponge, or nylon pad using a mild detergent diluted in warm water. Use commercial degreasers if heavily soiled.

• If spraying solutions into oven cavity, protect interior rear wall from moisture or mist.

Cleaning Oven Cavity

Remove racks and rack guides for best results. Recommended cleaning solution is Convection Express Cleaner. Repeat cleaning several times if necessary . Saturate oven interior surfaces with Amana Convection Express Cleaner and let sit for 2 to 5 minutes. Rub vigorously with nylon scouring pad to loosen debris. Wipe clean with warm, damp clean cloth.

NOTE: A plastic putty knife or equivalent may be used

to remove baked on debris.

• Wear protective rubber gloves when cleaning oven.

• Use only a plastic putty knife, nylon scouring pad or equivalent, to aid in removing soil or build-up from the oven interior.

• Do not use knife, metal utensil, or steel wool pad to remove baked on material. This will damage the teflon coating.

• Refer to warranty for limitations regarding teflon interior and cleaning requirements.

Oven Racks and Rack Guides

Clean the oven racks and rack guides with a detergent solution made with warm water . Scrub with a soft nylon pad to loosen and remove any baked on materials. DO

NOT use a lye based oven cleaner, such as many of the 'instant' oven cleaners. This will damage the finish

of the oven, the racks, and rack guides.

Air Filter

Air filter must be cleaned regularly to prevent overheating of oven. The air filter is located directly below the oven door.

1. Remove the filter retaining screws, located on the

outside edges of the filter.

2. Remove the air filter.

3. Wash filter in a mild detergent solution made with

warm water .

4. Rinse and dry thoroughly .

5. Replace filter and screws.

NOTE: Clean air filter regularly to prevent overheating,

which may damage oven.

Discharge Air Vents

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.

9 RS2220002 Rev. 0

Display and Features

A—Oven Door Handle (Lift to open.) B—Rack Guides C—T op Control Panel

Item flashes in display indicating keypads can be used and cooking entries can be made.

ITEM

STG

1 2

Oven Features

Temperature is displayed in the time field.

450F

PREHEAT NOT READY STANDBY

D—Display E—Side Control Panel G—Air Intake Filter

Display

POWER

COOK LEVEL

Preheat not ready indicates the oven is not at preheat temperature. NOT flashes while the oven heats to preheat temperature.

RS2220002 Rev . 0 10

Display and Features (cont’d)

Item is not

displayed indicating keypad will not accept entries. To activate keypad, open and close oven door—Item will then display .

ITEM

Displays stage the oven is cooking in during multi-stage cooking cycles.

STG

1 2

450F

PREHEAT NOT READY STANDBY

Preheat ready displays when oven has reached the preset preheat temperature.

POWER

COOK LEVEL

Displays menu number selected by user.

ITEM

C M

Convection cooking only.

Time left in cooking condition

STG

PREHEAT NOT READY STANDBY

STG

5 45

PREHEAT NOT READY STANDBY

5 45

POWER

COOK LEVEL

Power displays when oven is actively generating microwave energy . Will not display when set at 0, and will turn on and off when set less than HI.

POWER

COOK LEVEL

Indicates percentage of microwave power (0 to 100%). 9 is 90%, 5 is 50%, H is High (100%).

Combination cooking: both convection (C) and microwave energy (M) are used.

Cook level displays with the amount of microwave energy used.

11 RS2220002 Rev . 0

PREHEAT

ON / OFF

TIME

TEMP

POWER

LEVEL

STAGE

PROGRAM

SAVE

RESET

Display and Features (cont’d)

Cooking D is play

DISPLAYS DESCRIPTION

PREHEAT NOT READY

Start Pad

START

STOP

The start pad is used to begin a manual time entry cooking cycle.

STOP/RESET pad

The STOP/RESET pad stops a cooking sequence in progress, clears out any remaining time, and also ends a programming or user option cycle. When the STOP/RESET pad is used to end a programming or option change, the changes are discarded.

PREHEAT READY

00:00

PREHEAT NOT READY

COOK LEVEL

ITEM

STG

STANDBY

C M

PREHEAT READY

reached preheat temperature and is ready to cook. Displays cooking time. If stage cooking is

programmed, total cooking time is displayed.

PREHEAT NOT REA DY

flashes when oven is turned on and is warming up to the selected preheat temperature.

COOK LEVEL

power level. HI is the highest setting, and 0 is lowest (no microwave energy used).

ITEM

programmed cooking condition when using a programmed pad. cooking condition can be started or programmed.

STG

stage the oven is at in the cooking condition.

STANDBY

also after the oven is plugged in, the door is opened, and then shut.

C M

displays the single or double digit entry of a

displays with a single number. This is the

displays when oven is turned off, and

displays when oven is convection cooking.

displays when oven has

displays and

displays the current microwave

ITEM

also flashes when a

NOT

Temperature warnings

The combination oven has two distinct temperature warnings:

• A warning when the preheat temperature does not match the preprogrammed temperature of a cooking condition.

• A warning when the actual oven cavity temperature is not to preheat temperature, such as when the oven is first started.

C M

POWER

Programming D is pla y

DISPLAYS DESCRIPTION

Prog

OP: --

STG

RS2220002 Rev . 0 12

C M

displays when oven is cooking using both

microwave energy and convection.

POWER

generation in the oven. power setting is at 0; and

when microwave energy is set at less than HI.

Displays when oven is in programming mode for single pad or double pad memory.

Displays when oven is in user option mode. User options can then be set or specified.

Displays stage number during cooking or when programming a specific cooking stage. Stage number (1 through 4) indicates the stage that is being used.

displays during active microwave

POWER

will not display when

will turn on and off

Programming

STAGE

PROGRAM

SAVE

PROGRAM

SAVE

PROGRAM

SAVE

TIME

TEMP

POWER

LEVEL

PREHE AT

ON / OFF

Programming Pads

Oven is shipped from the factory for single pad programming. To change the oven default to double pad programming, see program the amount of time, power level, or temperature setting for a pad.

1. Oven must be ON.

• Press PREHEAT ON/OFF.

• ITEM must flash in display.

2. Press PROGRAM SAVE.

• Programming mode begins.

• PROG displays.

• Oven is in programming mode.

3. Press pad to be programmed or reprogrammed.

• Display will change to review all settings for the pad.

• The pad number that is being programmed displays below the word ITEM.

4. Press TIME to program amount of cooking time.

• Enter desired cooking time by using numeric key pads.

5. Press TEMP pad to program the cooking temperature.

• Enter desired convection temperature by using numeric pads.

6. Press POWER LEVEL to program level of microwave power.

• Press POWER LEVEL again to set to H (High).

• For a lower microwave power, press pads 1 (for 10%)

through 9 (for 90%). 0 turns off the microwave

power and cooking is by convection only.

7. Press PROGRAM SAVE to save the program changes.

8. To discard changes, press STOP/RESET.

User Option

section. To

Programming Multiple Stages

Stage cooking allows consecutive cooking cycles without interruption. Up to four different cooking cycles can be programmed into a memory pad.

Programming Preheat Setting

The convection temperature setting can be set between 150°F to 475°F. It is recommended to set the preheat setting to the most commonly used temperature for that oven. The factory default preheat setting is 450°F.

To program the preheat setting:

1. Press PREHEAT ON/OFF pad.

2. Press PROGRAM SAVE pad.

3. Press TEMP pad.

4. Enter desired temperature by using the numeric key pads.

5. Preheat temperature is changed.

What is stage cooking?

Stage cooking enables several different cooking cycles, or stages, to be used consecutively without repeated input from the user. Stage cooking can be set to to defrost food initially , then cook it, and then keep the food warm until serving time.

Exampl e of Stage Coo king Conditions

To use stage cooking:

1. Follow steps 1 through 6 above.

7. Press STAGE.

• This will begin programming for the next cooking stage.

• Display indicates stage to be programmed.

• Enter cook time, temp and power level as in steps 4. 5 and 6.

• To enter another cooking stage for that pad, press ST AGE pad again.

• Up to four different stages can be programmed.

8. Press PROGRAM SAVE to save the program and changes.

9. To discard changes, press STOP/RESET before pressing PROGRAM SAVE.

13 RS2220002 Rev . 0

Temp

Power

Time

Stage 1 Stage 2 Stage 3

450°F 450°F 450°F

H (high) 3 0

2:30 1:30 1:30

Convection Cooking

PREHEAT

ON / OFF

TIME

TEMP

POWER

LEVEL

To avoid risk of burns, handle utensils, racks, and door with care. Allow oven, utensils, and racks to

cool before cleaning. Oven, utensils, and racks, become hot during operation.

Convection Cooking

Convection cooking utilizes both a convection element and fan to evenly distribute heated air throughout the oven cavity . By circulating air, no hot or cold spots occur , creating a consistent temperature envelope around the food. These consistent temperatures cook food evenly and reduces cooking time. Oven will always operate in convection mode.

All the pad does is beep.

Ovens are not shipped

preprogrammed. Any preset cooking conditions must be set by the customer. If a pad is pressed that has not been programmed, a rapid triple beep will sound and no cooking condition will initiate.

CAUTION

To operate the oven for convection cooking only, you can use preprogrammed pads or manual time entry . The following instructions are

for convection cooking only . For combination cooking, see that section.

Convection Cooking with Programmed Pads

1. Press PREHEAT ON/OFF to start the oven.

• Oven begins a preheat cycle.

• PREHEAT NOT READY displays.

• To change preheat settings, see

2. Oven reaches preheat temperature.

• Signal sounds and PREHEA T READY displays.

3. Press selected pad.

• ITEM must be flashing in display. If not, open and close door .

• If using single pad programming, press pad and oven begins automatically.

• For double pad programming, press pads in proper sequence and oven begins automatically .

4. Cooking cycle begins

• Total cooking time is displayed.

• To display the temperature while a program is running, press the TEMP button and the temperature will briefly display.

5. Oven finishes cooking sequence

• An end of cycle beep signals the end of the cooking cycle.

• Oven interior and cooking dish will be hot.

6. Press PREHEAT ON/OFF to shut off oven.

Programming.

PREHE AT

ON / OFF

Convection Cooking Using Manual Time Entry

1. Press PREHEAT ON/OFF to start the oven.

• Oven begins a preheat cycle.

• PREHEAT NOT READY displays.

• To change preheat settings, see

2. Oven reaches preheat temperature.

• Signal sounds and PREHEAT READY displays.

3. Press TIME.

• Enter desired cooking time by using the keypad.

4. Press TEMP if cooking temperature is different than preheat temperature.

• Enter the new temperature.

5. Press POWER LEVEL.

• For convection cooking only, press 0.

6. To activate stage cooking, press STAGE and repeat steps 3, 4, and 5.

• Up to 4 different stages can be programmed.

7. Press the START pad to begin the cooking cycle.

RS2220002 Rev . 0 14

Programming

START

Combination Cooking (microwave and convection)

PREHEAT

ON / OFF

PREHEAT

ON / OFF

TIME

TEMP

POWER

LEVEL

CAUTION

To avoid risk of burns, handle utensils, racks, and door with care. Allow oven, utensils, and racks to cool before cleaning. Oven, utensils, and racks, become hot during operation.

To operate the oven for combination cooking, you can use preprogrammed pads or manual time entry. The following instructions are for

combination cooking only. For convection only cooking, see that section.

Combination Cooking

Combination Cooking with Preprogrammed Pads

1. Press PREHEAT ON/OFF to start the oven.

• Oven begins a preheat condition.

• PREHEAT NOT READY displays with NOT flashing.

• To change preheat temperature, see section.

2. Oven reaches preheat temperature.

• Signal sounds and PREHEAT READY displays.

3. Press desired pad.

• For double pad programming, press pads in proper sequence.

• Oven begins automatically.

4. Cooking cycle begins

• Total cooking time is displayed.

• To display the temperature while a program is running, press the TEMP button and the temperature will briefly display .

5. Oven finishes cooking sequence

• An end of cycle beep signals the end of the cooking cycle.

Oven interior and cooking dish will be hot.

6. Press PREHEAT ON/OFF to shut off oven.

Programming

Using Manual Time Entry

1. Press PREHEAT ON/OFF to start the oven.

• Oven begins a preheat condition.

• PREHEA T NOT READY displays with NOT flashing.

• To change the preheat temperature, see

2. Oven reaches preheat temperature.

• Signal sounds and PREHEA T READY displays.

3. Press TIME.

• Enter desired cooking time by using numeric keypad.

4. Press TEMP if cooking temperature differs from preheat temperature.

• Enter the new temperature.

5. Press POWER LEVEL.

• To have microwave power on HIGH, press the

POWER LEVEL pad again. H displays.

• For a lower microwave power, press pads 1 (for

10%) through 9 (for 90%). 0 turns off the microwave power and cooking is by convection only .

6. If stage cooking is desired, press STAGE and repeat steps 3, 4, and 5.

• Up to 4 different stages can be programmed.

7. Press the START pad to begin the cooking cycle.

Programming

START

The combination mode uses both the speed of microwave energy and browning of convection cooking to yield fast, high quality food.

• Microwave cooking uses high frequency energy waves to heat the food. When cooking, microwave energy causes food molecules to move rapidly . This rapid movement between the food molecules creates heat, which cooks the food. POWER displays when oven is generating microwave energy for the current cycle.

• Convection cooking uses the selected oven temperature to bake and brown foods. The circulating air surrounds food in an envelope of evenly heated air.

• Oven will maintain a minimum convection temperature of 150°F (66°C) to ensure drier air and more even cooking.

15 RS2220002 Rev . 0

User Options

PREHEAT

ON / OFF

TIME

CONVECTION

Didn’t like an option?

Factory settings are marked in bold. To change the oven back to the factory setting, simply select the option that is marked in bold.

My changes weren’t saved.

In order for any changes to be saved, the PROGRAM SA VE pad must be pressed after selecting an option. Pressing the STOP/RESET pad will not save changes.

HIDDEN

EXPRESS

PAD

Changing user options

Options such as single or double pad programming, beep volume, and maximum cooking time can be changed to suit individual preferences.

To change options, oven must display STANDBY.

1. Press hidden pad.

• Pad is unmarked and located to the direct left of PREHEAT ON/OFF pad.

• Nothing will be displayed when hidden pad is pressed.

2. Press PROGRAM SAVE pad.

• 0P: displays. Oven is now in options mode.

3. Press number pad that controls option to be changed.

• See table below for options.

• Current option will display .

4. Press number pad again to change the option.

• Each time pad is pressed, option will change.

• Match code displayed with code for desired option.

5. Press PROGRAM SAVE pad to save changes.

• To change additional options, repeat steps 3 and 4.

• Changes take affect after PROGRAM SAVE pad is pressed.

6. Press STOP/RESET to return to STANDBY, or open and close oven door.

Numbered Pads Display Options (Factory Settings in Bold)

Preprogrammed Pads

Manual Ti m e Entry

Reset to READY mode

Keybeep

Keybeep Volume

Food Done Signal

Keypad Time Entry

Temperature Warnings

TEMP PAD

Temperature S cale

OP:10

OP:11 OP:20

OP:21 OP:30

OP:31 OP:40

OP:41

OP:50 OP:51 OP:52

OP:53 OP:60

OP:61 OP:62 OP:63 OP:70 OP:71

OP:72

OP:73

OP:80

OP:81 OP:82 OP:83

OP:bo

OP:b1

Allows 10 (0-9) preprogrammed pads.

Allows 10 0 ( 00-99) preprogram m ed pads. Manual time entry/cooki ng not allowed

Manual time entry/cooking allowed Opening oven door does not reset oven back to ready mode

Opening oven door resets the oven back to ready mode Keys do not beep when pressed (keybeep off)

Keys beep when pressed (keybeep on)

Keybeep volume OF F Keybeep volume low Keybeep volume med iu m

Keybeep volume high Food done signal is a continuous beep until reset by user

Food done signal is a three second beep Food don e signal is four beeps , on e t ime only Food done signal is four beeps, four times Keypad ti me entry window is 15 seconds Keypad ti me entry window is 30 seconds

Keypad time entry window is one minute

Keypad time entry window is two minutes

Both temperature warnings off

Warning only when pr eheat temperature does not ma t c h pr eprogrammed tem perature Warning only when actual oven cavity temperature is not to preheat temperature Both temperature warnings on

°F

°C

RS2220002 Rev . 0 16

User Maintenance

Replacing Oven Light

1. Disconnect electrical supply .

2. Remove screw from access cover on top left wall of oven exterior.

3. While wearing protective gloves, unscrew the light bulb counterclockwise.

4. Replace light bulb with 230-volt (rated 250V), 40-watt appliance bulb.

• Do not over tighten bulb or it may be difficult to

remove later.

5. Replace light bulb cover and access cover before use.

6. Reconnect power supply .

Moving Oven Rack Guides

The oven rack guides can be moved to one of three positions within the oven, allowing for versatility in cooking and placement of food. The middle rack position is the most common. Guides can also be removed for easier cleaning.

To remove rack guides:

1. Oven cavity must be cool to touch.

2. Remove oven rack by lifting up and sliding to the front of the oven.

3. Apply gentle pressure by pulling upwards on the front of rack guide.

4. Lift the rear of the rack guide to remove. Guide may be snug.

WARNING

To avoid risk of burns or electrical shock:

• disconnect electrical supply to oven before changing light bulb.

• before replacing light bulb make sure oven and bulb are cool.

• do not operate oven without bulb and access cover in place.

CAUTION

Wear gloves to protect hands from accidental bulb breakage.

To replace rack guides:

1. Oven cavity must be cool to touch.

• UP on guide rack should be in correct direction for placement.

2. Place rear of rack guide over desired anchor in back of oven and push down.

3. Place front of rack guide over desired anchor in front of oven.

• Apply firm pressure to front and rear of rack guide to fit onto anchor.

• Fit may be tight.

• Rack guide should not move after being set in place.

4. Replace oven rack as desired.

• Slide oven rack towards rear of oven, holding upwards to avoid detents.

• Oven rack can be placed upwards or downwards. Upwards is

recommended.

• Oven rack must be seated in detents.

Service codes

During operation, the oven may display one of the following codes. If this should occur:

1. Unplug oven and leave unplugged for approximately one minute. Plug oven in and see if code reappears.

• If code does not reappear, continue normal use with the oven.

2. If service code reappears, write down the service code displayed and contact the nearest authorized Amana Servicer .

• Do not use oven until contacting the Amana Servicer.

Error Codes

Err1 err2 err3 err4 err5 err6 err7

17 RS2220002 Rev . 0

Specifications

19 1/4"

49 cm

18"

46 cm

38 1/4"

97 cm

MODEL ACE*** (***

Power Source

Voltage AC 208 VAC 230 VAC Frequency 60 Hz Amperage 20 A

Power

Frequency 2450 MHz Nominal Microwave Energy (IEC705) 1000 Watts

Power Consumption Combination: 3300 watts Convection only: 2700 watts Power Cord Length 5' 6" (168 cm) Oven Cavity Dimensions inches (cm) 13" (33 cm) x 10½" (27 cm) x 15" (38 cm) Net Weight 112lbs. (51 kg) Oven Cavity Capacity 1.2 Cu. Ft. (34 L)

ACE208 ACE230

indicates model number)

21 1/8"

54 cm

Receptacle and plug NEMA 6-20R

Product specifications can change at any time without notice.

RS2220002 Rev . 0 18

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 Test Results

Thermal cutout Disconnect all wires from TCO.

Diode

Measure resistance across terminals.

Control TCO..........................................

Fan TCO...............................................

Magnetron TCO....................................

Discharge Capacitor

Remove diode lead from capaci tor and connect ohmmeter.

Reverse leads for second test.

Open at 300°F (149°C) and closed at 257°F (125°C) Closed at 160°F (71°C ) and open at 125°F (52°C) Open at 235°F (113°C) and closed at 150°F (66°C) Infinite res istance should be meas ured in one direction and 50KΩ or more in the opposite direc tion.

Ohmmeter must contain a

NOTE:

battery of 6 volts mi nimum.

Triac Disconnect wir es to triac.

MT2

MT1 GATE

Triac 1 (top) is for front element Triac 2 (middle) is for rear element Triac 3 (bottom) is for microwave

Capacitor

Snubber assembly Di sconnect wires to snubber.

Magnetron

Caution - Do not operate oven with

Measure resist ance from:

MT1 to MT2..........................................

MT1 to Gate..........................................

MT2 to Gate..........................................

All terminals to ground..........................

Measure voltage from:

MT1 to Gate

Discharge Capacitor

Remove wires from capac itor terminals and connect ohmmeter, s et on highest resistance scale to terminals.

Also check between each terminal and capacitor case.

Measure resistance across terminals. Infinite

Discharge Capacitor

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

wire to terminal MT2 removed.

Infinite Approximately 15 Ω, then reverse meter leads 30 Infinite Infinite

0.8 VAC when energized If no voltage, check H.V. board and wi ring.

Between Terminals: Meter should momentarily deflect towards zero then return to over 5 MΩ. IF no deflecti on 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:

oven does not heat and all other components test good replace the magnetron and retest.

Ω

This test is not conclusive. If

Microwave blower motor

Remove all wires from motor . Measure resistance across coil.

Approximately 33

Ω

RS2220002 Rev. 019

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 Test Results

COM

208

230

Transformer

Interlock switch

Discharge Capacitor

Remove all wires from t erminals. Measure resist ance from:

230 to COM 208 to COM 230 to Ground 208 to Ground Terminal 5 to 6 Terminal 4 to Ground

Disconnect wires to switch.

Less than 1 Less than 1 Infinite Infinite Less than 1 Approximately 70

Ω Ω

Ω

Door Closed

2 4

Convection blower motor

Heating element assembly

Resistance ther mal device (RTD)

Secondary

Primary

Monitor

With door open measure resistance from: Terminal 2 to 3 Terminal 4 to 5 Terminal 7 to 8

With door closed measure resistance from: Terminal 2 to 3 Terminal 4 to 5 Terminal 7 to 8

Remove wires from motor. Measure resistance across

terminals A and B.

Disconnect wires from terminals. Measure resistance across heating

element.

Front element 1200 W ......................

Rear element 1500 W ......................

Temperature 32°F

Infinite Infinite Indicates continuity

Indicates continuity Indicates continuity Infinite

Approximately 20

Indicates continuity ACE208 ACE230

Ω

Resistance 1000

Ω

350°F

Lamp receptacle Test continuit y of receptacle terminals. Indicates continuity with bulb

1654

Ω

screwed in.

RS2220002 Rev. 0 20

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 Test Results

Side touch panel

Top touch panel

Continuity is indicated as 100 Ω and below.

Pad

1 2 3 4 5 6 7 8 9 0 Start Stop/Reset

Pad

Preheat Time Temp Power Level Stage Program Save Hidden Pad

Trace

3 & 5 3 & 6 3 & 7 3 & 8 3 & 9 4 & 5 4 & 6 4 & 7 4 & 8 4 & 9 5 & 6 6 & 9

Trace

3 & 4 5 & 7 7 & 8 5 & 8 5 & 9 6 & 7 8 & 9

Measurement

Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity

Measurement

Continuity Continuity Continuity Continuity Continuity Continuity Continuity

Wire harness High voltage board

to display module harness

Display board

Side Touch Panel

Pin 1

Connector

3.5 VAC should be indicated whenever the oven is plugged into a power supply.

If voltage is present and no display is indicated, replace display board. If no voltage is present, check wire harness connections and H.V. board.

Test continuit y of wires. Indicates continuity

Interlock

Pin 1

Connector

H.V. board Connector

Pin 1

Top Touch Panel Connector

RS2220002 Rev. 021

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.

H.V. board

Pin 1

Pin 50

Pin 1

Pin 28

E3 E2

Pin 1

In straight convection mode, both elements operate simultaneously. In combination mode, the rear element will operate simultaneously with either the microwave or front element.

Function Test Set-Up Meter

Probe Placement Results

Setting

Input to H.V. board At H.V. board Volts J1 pin 1 (Black wire)

Line voltage

& J1 pin 2 (Red wire)



Output to display

board

Disconnect J5 connector

Volts J5 pin 28 &

J5 pin 50

24 VDC

NOTE: For the following test, place oven in Service Test Mode (see page 27).

Relay Function Test Set-Up Meter

Probe Placement Results

Setting

K1 Cooling fan Disconnect

J2 connector

K2 Convection

motor

Disconnect J2 connector

K3 Cavity light Disconnect

J2 connector

K4 Heater A

(front)

Disconnect J3 connector

K7 Microwave Disconnect

J4 connector

K9 Heater B

(rear)

Disconnect J4 connector

Ohms J1 pin 1 (Black wire)

& J2 pin 4

Ohms J1 pin 1 (Black wire)

& J2 pin 3

Ohms J2 pin 1

& J2 pin 2

Test mode 5 off  no continuity Test mode 5 on  < 1 Ω

Test mode 4 off  no continuity Test mode 4 on  < 1 Ω

Test mode 6 off  no continuity Test mode 6 on  < 1 Ω

Ohms E4 & J3 pin 3 Test mode 2 off  no continuity

Test mode 2 on  < 1 Ω

Ohms J4 pin 4 &

J4 pin 5

Test mode 3 off  no continuity Test mode 3 on  < 1 Ω

Ohms E6 & J4 pin 1 Test mode 1 off  no continuity

Test mode 1 on  < 1 Ω

RS2220002 Rev. 0 22

Test Modes

Microwave Power Test

(TRADITIONAL TEST METHOD)

Test Equipment Needed:

• Amana power test kit R0157397 or

• Menumaster power test kit M95D5.

1. Place one rack in the oven using lowest rack position.

2. Fill the plastic container to the bottom of the 1000 ml. lines with cool tap water.

3. Using the thermometer; Fahrenheit or Centigrade, stir the water , measure and record the water temperature. IMPORTANT : Initial water temperature should be approximately 60°F (20°C).

4. Place the container on the center of the oven rack and heat the water for 62 seconds.

a. Close the door. b. Press Hidden Pad, 1, 3, 5, 7, 9. c. Press 3 to activate microwave mode. d. Display counts up to 62 seconds, and unit shuts

off.

e. Open the door.

5. Stir the water , measure and record the temperature of the water after heating time is completed.

6. Subtract the starting water temperature (Step 3) from the ending water temperature (Step 5) to obtain the temperature rise.

7. Refer to the Temperature Chart.

NOTE: V ariation or errors in the test procedure will

cause a variance in the temperature rise indication. Additional power tests should be made if temperature rise appears marginal.

NOTE: Low line voltage may cause lower power output

(temperature rise).

NOTE: Always perform 3 tests for accuracy. Change

water after each test.

Temperature Chart

ONE MINUTE, TWO SECONDS run time chart for units less than 1550 watts cooking power.

∆∆

∆T Cooking

∆∆

(°F) Power Output (°F) Power Output

12 464 20 775 13 504 21 814 14 542 22 852 15 581 23 891 16 620 24 930 17 659 25 969 18 697 26 1007 19 736

∆∆

∆T Cooking

∆∆

∆T Cooking

∆∆

(°C) Power Output (°C) Power Output

7 490 12 840 8 560 13 910 9 630 14 980 10 700 15 1050 11 770

∆∆

∆T Cooking

∆∆

23 RS2220002 Rev. 0

Test Modes

Convection T emperature Test

NOTE: It is absolutely necessary to own and use a

thermocouple type oven tester to accurately measure oven temperature. No other type of thermometer can take its place.

NOTE: Before testing an oven to check calibration,

inspect the RTD for proper mounting.

1. Place one wire rack in center position. Remove any other racks and utensils.

2. Clip thermocouple to the center rack and run lead outside oven door , or wrap thermocouple around rack and have tip of thermocouple extend upward towards top of cavity approximately 1".

3. Press

4. Press

5. Press

6. Enter 450°F.

7. Allow oven to cycle one time.

8. Record high and low peaks from next two cycles.

NOTE: Display does not indicate if heating elements

Cycle 1 440°F 460°F Cycle 2 439°F 461°F

If the average temperature is too high or too low the oven temperature offset needs to be calibrated.

PREHEA T ON/OFF PROGRAM SAVE TEMP

pad.

are on or off.

Example:

LOW HIGH

879°F + 921°F = 1800°F

1800°F / 4 = 450°F average temperature

Convection Temperature Calibration

NOTE: It is normal for the average oven temperature to

vary from the oven setting by as much as 25°F. Difference will not effect cooking since recipes are written with this difference in mind.

Calibration

NOTE: Door must be closed.

1. Press

2. Press pads

3. Press

NOTE: Display will show the current offset setting.

4. Press the NOTE: Offset temperature range is +40°F to -40°F and

5. Press

NOTE: Retest the oven after any offset changes are

Example:

• Oven temperature is set for 450°F

• Average of temperature test is 475°F

• Offset setting must be reduced by 25°F

• If offset is shown as 10°F, press the "0" pad until -15 is shown in the display (10 – 25 = –15)

HIDDEN P AD

1,3,5,7, 9.

"0"

pad.

STG

ITEM

QTY

1 2 3 4

"0"

PREHEAT STANDBY

LMT

NOT READY

pad to change the offset.

advances in 2 and 3° increments.

STOP/RESET

pad to save offset changes.

made.

POWER

COOK LEVEL

RS2220002 Rev. 0 24

Radiation Leakage Testing

WA RN IN G

Measurement With the Outer Case Removed

Check for radiation leakage after servicing. Should the leakage be more than 4mW/cm2 inform Amana immediately . After repairing or replacing any radiation safety device, keep a written record for future reference, as required by D.H.H.S. and HEW regulations. This requirement must be strictly observed. In addition, the leakage reading must be recorded on the service repair ticket while at the customer’s location.

Equipment

• Electromagnetic radiation monitor

• 600 cc glass beaker

Procedure For Measuring Radiation Leakage

Note before measuring -

• Do not exceed meter full scale deflection. Leak monitor should initially be set to the highest scale.

• T o prevent false readings the test probe should be held by the grip portion of the handle only .

• The scan speed is equal to one inch per antenna revolution or one inch per second if antenna speed is unknown.

• Areas to be checked are all door seal areas and any venting parts.

• Leakage with the outer panel removed, 4mW/cm2 or less.

• Leakage for fully assembled oven with door normally closed, 4mW/cm2 or less.

• Leakage for a fully assembly oven (before the latch switch (primary) is interrupted) while pulling the door, 4mW/cm2 or less.

DANGER

To avoid risk of personal injury or death avoid contacting any high voltage components.

Whenever you replace the magnetron, measure for radiation leakage before the outer case is installed and after all necessary components are replaced or adjusted. Special care should be taken in measuring around the magnetron.

Measurement With a Fully Assembled Oven

After all components, including the outer panel are fully assembled, measure for radiation leakage around the door periphery , the door viewing window , the exhaust opening, and air inlet openings.

Record Keeping and Notification After Measurement

1. After any adjustment or repair to a microwave oven, a leakage reading must be taken. Record this leakage reading on the repair ticket even if it is zero.

2. A copy of the repair ticket and the microwave leakage reading should be kept by the repair facility.

1. Open the oven door and verify that there is only one rack in place on the bottom rack hooks.

2 . Pour 275 ± 15 cc (9 oz ± 1/2 oz) of 20 ± 5°C. (68±

9°F.) water in a glass beaker which is graduated to 600 cc and place the beaker in the center of rack.

3. Set the radiation monitor to 2450 MHz and use it following the manufacturer’s recommended test procedure to assure correct results.

4. While measuring the leakage, always use the two inch (5 cm) spacer supplied with the probe.

5. Press the start pad or turn on the timer and with the magnetron oscillating, measure the leakage by holding the probe perpendicular to the surface being measured.

25 RS2220002 Rev. 0

Display Diagnostics

CAUTION

All repairs as described in this troubleshooting section are to be performed only after the caution procedures one through eight listed below have been followed.

1. Check grounding before checking for possible causes.

2. Be careful of the high voltage circuit.

3. Discharge high voltage capacitor.

4. When checking the continuity of the switches or the high voltage transformer, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.

5. Do not touch any parts of the circuitry on the P.C. Board circuit since static electric discharge may damage this control panel. Always touch yourself to ground while working on this panel to discharge any static charge in your body.

6. 208/230 VAC is present in the high voltage circuit board, power relay and primary circuit of low voltage transformer.

7. When troubleshooting, be cautious of possible electrical hazard.

8. When testing convection operation, convection fan may start at any time or if oven is hot.

Error Codes

During operation, the display may show the following service codes: NOTE: Before scheduling service for any error codes, instruct customer to unplug oven for 1 minute, reconnect

power, and retest. If unit operates properly, no service call is required.

Display Description Corrective Action

Err1 Err2

Err3

Err4

Err5

Err6 Err7

Checksum Error See note above.

Hardware Problem See note above.

Defective Touch Panel See note above.

RAM Error See note above.

Error with RTD circuit If power level shows

0-Uncalibrated...................................

1-Shorted RTD circuit .......................

2-Open RTD circuit...........................

HOT

Door

RS2220002 Rev. 0 26

Door Interlock Primar y Switch See note above.

Replace H.V. board.

Verify wiring at H.V. board. If wiring is good, replace H.V. board.

Check green jumper at J8 connector on H.V. board. If jumper is good, replace H.V. board.

If Touch Panel is pressed for more than 30 seconds, this error code will appear. Replace touch panel.

Replace H.V. board. See note above.

Replace H.V. board. Check RTD and wiring to H.V. board. Check RTD and wiring to H.V. board.

See note above. Open TCO. Convection motor inoperati ve. Restricted air filter. H.V. board inoperative. Broken or loose wir e.

Verify latch m echanism moves freely on door. Verify J1 connector on display board is proper ly seated. Test interlock switch assembly and perform door adjustment if necessary. Replace interlock switch assembly if failed.

Service Test

NOTE : Unit must b e in S TANDBY mode.

To Enter Service Mode, oven door must be closed.

NOTE: Pads will not beep when pressed.

Press Hidden Pad

Hidden Pad

PREHEAT

ON / OFF

Then

1 3 5 7 9

STG

ITEM POWER

QTY

1 2 3 4

LMT

NOT READY

PRE HEAT STA NDBY

COOK LEVE L

Press

0 = Deactivated 1 = Activated

Toggles Element B (Re ar) ON/OFF.

Toggles Element A (Front) ON/OFF.

Display

STG

ITEM POWER

QTY

1 2 3 4

PREHEAT ST ANDBY

LMT

NOT READ Y

COOK LEVEL

Displays actual Amperage

ITEM

STG

1 2 3 4

QTY

PREHEAT STANDBY

LMT

NOT

READ Y

POWER

COOK LEVEL

Timer counts up to 99 seconds.

Displays actual Amperage

STG

ITEM POWER

QTY

1 2 3 4

PREHEAT ST ANDBY

LMT

NOT READ Y

COOK LEVEL

Timer counts up to 99 seconds.

Component Evaluation

Indicates Service Mode

If no Amperage, check: Heating element Triac 2 (middle) H.V. board (relay K9 and triac 2 drive vol ta ge) Wiring

If no Amperage, check: Heating element Triac 1 (top) H.V. board (relay K4 and triac 1 drive vol ta ge) Wiring

Toggles Microwave ON/OFF.

Toggles Convection Fan ON/OFF.

Displays actual Amperage

STG

ITEM

QTY

1 2 3 4

LMT

PREHEAT ST ANDBY

NOT READ Y

POWER

COOK LEVEL

Timer counts up to 62 seconds and unit shuts off.

STG

ITEM POWER

QTY

1 2 3 4

LMT

PREHEAT ST ANDBY

NOT READ Y

COOK LEVEL

If no Amperage, check for line voltage at H.V. transformer primary winding. If no voltage, check: Interlock switch (secondary) Magnetron TCO Triac 3 (bottom) H.V. board (relay K7 and triac 3 drive voltage) Wiring

If voltage is present, check H.V. components and wiring.

If no fan operation, check: Convection fan motor and wheel H.V. board (rel ay K2) Wiring

27 RS2220002 Rev. 0

Service Test

Press

Toggles Cooling Fan ON/OFF.

Toggles Oven Li

ht ON/OFF.

Displa Ma

s # of

netron Hours.

Displa

STG

ITEM

ITEM POWER

1 2 3 4

STG

1 2 3 4

STG

1 2 3 4

QTY

PREHEAT STANDBY

LMT

QTY

LMT

QTY

LMT

NOT READY

PREHEAT STANDBY

NOT READY

PREHEAT STANDBY

NOT READY

POWER

COOK LEVEL

POWER

COOK LEVEL

Component Evaluation

If no fan operation, check: Coolin H.V. board (rela

fan motor and wheel

K1)

Wirin

If no light operation, check: Oven li H.V. board (rela

K3)

Wirin

Displa with a 1 to 1 ratio rounded to the nearest ten

s # of Door Cycles

Clears Hours and C (press START to activat e) (Resets to 0).

cles

Displa Temperat ure OF FSE T.

s current

TEMP

STG

ITEM POWER

ITEM

ITEM POWER

1 2 3 4

STG

1 2 3 4

STG

1 2 3 4

QTY

PREHEAT STANDBY

LMT

QTY

LMT

QTY

LMT

NOT READY

PREHEAT STANDBY

NOT READY

PREHEAT STANDBY

NOT READY

COOK LEVEL

POWER

COOK LEVEL

Display current oven Temperature as sensed b

RTD.

To Exit Service Mode Press

STOP

RESET

RS2220002 Rev. 0 28

T roubleshooting

PREHEAT

ON / OFF

Power Up

Plug oven into power source.

Error Code Appears

STG

ITEM POWER

QTY

1 2 3 4

LMT

PREHEAT

NOT READY

STANDBY

COOK LEVEL

POWER UP CONDITION NORMAL

Preheat/Convection Condition

Press

FLASHES for 1 minute.

ITEM

STG

C M

QTY

1 2 3 4

PREHEAT STANDBY

LMT

NOT READY

FLASHES until unit reaches PREHEAT temperature.

POWER

COOK LEVEL

Proceed to DISPLAY DIAGNOSTICS.

1. No line voltage.

2. Inoperative power cord.

3. Inoperative fuse.

4. Inoperative display board.

5. Inoperative H.V. board.

6. Broken or loose wire connection.

1. Inoperative top touch panel.

2. Inoperative interlock switch.

3. Inoperative H.V. board.

4. Broken or loose wire connection.

Blower operating cavity light on.

Error Code

READY CONDITION NORMAL

ITEM

STG

C M

QTY

1 2 3 4

PREHEAT STANDBY

LMT

NOT READY

POWER

COOK LEVEL

1. Binding or inoperative blower motor.

2. Inoperative cavity light.

3. Inoperative H.V. board.

4. Inoperative display board.

5. Broken or loose wire connection.

Proceed to DISPLAY DIAGNOSTICS.

1. Inoperative heating element.

2. Inoperative triac.

3. Inoperative H.V. board.

4. Broken or loose wire connection.

29 RS2220002 Rev. 0

T roubleshooting

PREHEAT

ON / OFF

TIME

TEMP

POWER

LEVEL

Microwave Condition

Open door, place cup of water in oven. Close oven door.

Press

desired time

enter

Press

STG

ITEM PO WER

ITEM

2 3 4

STG

1 2 3 4

QTY

LMT

QTY

LMT

START

NOT READY

PREHEAT STANDBY

NOT READY

COOK LEVEL

POWER

COOK LEVEL

End of cycle tone sounds.

Open door and remove water.

Is water heated?

YES

MICROWAVE CONDITION OPERATI N G PROPERLY

enter 150 F

enter desired microwave power level.

1. Inoperative top touch panel.

2. Inoperative side touch panel.

3. Inoperative H.V. board.

4. Broken or loose wire connection.

Heats Slowly

1. Inoperative or misadjusted interlock switch module.

2. Inoperative magnetron.

3. Inoperative thermal cutout.

4. Broken or loose wire connection.

No Heat

1. Inoperative or misadjusted interlock switch module.

2. Inoperative thermal cutout.

3. Inoperative triac.

4. Inoperative diode.

5. Inoperative capacitor.

6. Inoperative H.V. transfo rm er.

7. Inoperative magnetron.

8. Broken or loose wire connection.

RS2220002 Rev. 0 30

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Door Handle

Remove door handle by removing plactic plugs to gain access to set screws. Loosen set screws using a (3/32 inch allen screws), one located to the left of the door handle and one located on the bottom of the door handle.

Tighte n first

Plasti c plugs

NOTE: When replacing door handle, tighten side set

screw first.

NOTE: If set screws are removed, the set screw with

the flat end must be used in the bottom of the door handle.

Pointed tip

Flat tip

Outer Door

1. Remove door handle.

2. Remove plastic plugs covering screws with a thin flat blade screwdriver.

3. Remove crows foot screws using crows foot driver (921 13P01), securing outer door to inner door assembly.

4. Remove outer door from inner door assembly.

5. Reassemble outer door in reverse order.

Inner Door Assembly

1. Remove door handle.

2. Remove outer door.

3. Remove insulation pads from inner door assembly.

4. Remove screws securing inner door assembly to hinge.

5. Reassemble inner door assembly in reverse order.

Hinge

1. Remove outer case.

2. Remove door handle.

3. Remove outer door assembly .

4. Remove hinge mounting screws from hinge (five on front, four on side).

NOTE: Discard foam gasket on side of hinge.

5. When reinstalling hinge mounting screws, keep the side screws loose and the front screws tight, close door, press door against oven on the hinge side and tighten side hinge mounting screws in the sequence shown below.

Inner Door Assembly

Outer Insulation

Inner Insulation

Outer Door

31 RS2220002 Rev. 0

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Outer Case

1. Remove screws securing outer case to chassis, see illustration below.

2. Slide outer case back and lift off.

3. Reassemble outer case in reverse order.

Back Panel

1. Remove outer case.

2. Remove screws securing back panel.

3. Reassemble back panel in reverse order.

Stirrer Shaft

Stirrer Blade

Stirrer Insert

Back Panel

Outer

Case

Mounting

Screw

Stirrer Cover

1. See “Component Location” Figure 4, for location.

2. Unplug oven before removing stirrer cover to access stirrer assembly.

3. Loosen screw securing stirrer cover mounting clip and rotate clip to the side.

4. Slowly lower front of stirrer cover, then pull gently towards front of unit to release cover.

5. Replace stirrer cover by fitting stirrer blade on stirrer insert. Place back of stirrer cover into place, align stirrer insert onto stirrer shaft. Lift front of cover into position, rotate mounting clip into position, tighten screw.

CAUTION

If mounting clip is loose arcing will occur.

Stirrer Cover

Stirrer Cover Mounting Clip

RTD (Resistance Thermal Device)

1. See “Component Location” Figure 4, for location.

2. Remove outer case.

3. Disconnect RTD harness connector.

4. Remove mounting screw located inside oven.

5. Lift RTD from top of the oven.

6. Reassemble RTD in reverse order.

T op Touch Panel Assembly

1. See “Component Location” Figure 1, for location.

2. Remove outer case.

3. Disconnect all wire connectors at display board.

4. Remove screws securing top touch panel to unit.

5. Remove screws securing display board to top touch panel assembly .

6. Reassemble touch panel in reverse order.

RS2220002 Rev. 0 32

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Side Touch Panel Assembly

1. See “Component Location” Figure 1, for location.

2. Remove outer case.

3. Remove ribbon cable from display board.

4. Remove mounting screws securing side touch panel to unit.

5. Reassemble touch panel in reverse order.

High Voltage Circuit Board

1. See “Component Location“ Figure 2, for location.

2. Remove outer case.

3. Unplug connectors.

4. Disconnect wires from terminal locations on H.V. board.

5. Release mounting clips and remove board.

6. Reassemble high voltage board in reverse order.

Clip

Pin 1

Clip

NOTE: When reassembling, verify cable connection

with illustration of cable locations.

Pin 1

Clip

Pin 1

Clip

Pin 50

Pin 1

Pin 28

Clip

Pin 1

Clip

Pin 1

Clip

Interlock Switch Module

1. See “Component Location” Figure 2, for location.

2. Remove outer case.

3. Disconnect wiring from interlock switch assembly.

4. Remove mounting screws securing interlock switch.

5. When replacing assembly, all wires must be connected before operating oven.

NOTE: When the line fuse is blown interlock switch

module must be replaced.

Adjustment

1. To adjust interlock switch assembly, close door.

2. Loosen bottom and top screw on the interlock switch assembly, allowing switch assembly to move in or out.

3. With door closed, push forward on interlock assembly to engage door latch. Then pull back on interlock assembly until door is "snug" against front oven cavity and tighten bottom screw first, then top screw.

4. Door will remain latched when proper adjustment is made.

NOTE: If door is not properly adjusted display will

indicate

DOOR

when the door is closed.

33 RS2220002 Rev. 0

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Display Module

1. See “Component Location” Figure 1, for location.

2. Remove outer case.

3. Remove top touch panel, see Top Touch Panel Assembly procedure.

4. Reassemble display module in reverse order.

Magnetron

1. See “Component Location” Figure 3, for location.

2. Remove outer case.

3. Remove screws securing magnetron inlet cover and remove cover.

4. Remove screws securing waveguide duct.

5. Remove wires from magnetron.

6. Remove allen screws securing magnetron thermal cutout bracket to magnetron.

7. Remove magnetron mounting nuts and remove front magnetron cover bracket..

8. Remove magnetron.

9. When replacing magnetron, verify wire mesh gasket is reinstalled properly .

NOTE: When reinstalling magnetron, slide air baffle

inside magnetron before mounting magnetron in place.

NOTE: Place front magnetron cover bracket in place

before securing magnetron.

Triacs

1. See “Component Location” Figure 1, for location.

2. Remove outer case and back panel.

3. Remove wires from terminals of selected triac.

4. Remove screws securing triac to chassis.

5. Reassemble triac in reverse order.

Microwave Blower Wheel and Motor

1. Remove outer case and back panel.

2. Remove wiring from blower motor terminals.

3. Remove screws securing blower assembly to bracket.

4. Remove assembly from oven.

5. Loosen allen set screw securing blower wheel to motor shaft.

6. Remove blower wheel.

7. Remove screws securing motor to scroll.

8. Reassemble blower wheel and motor in reverse order.

NOTE: When reinstalling blower wheel, push blower

wheel on shaft, tighten, and rotate to insure clearance between blower wheel, and blower housing.

Fan Blade

Motor

Magnetron, Control, and Fan Thermal Cutout (TCO)

1. See “Component Location” Figure 3, for location.

2. Remove outer case.

3. Remove wiring from selected thermal cutout.

4. Remove screws securing thermal cutout.

5. Reassemble thermal cutout in reverse order.

RS2220002 Rev. 0 34

Housing

Wheel

Blower Assembly

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Fan Blade

1. Pull blade off shaft.

2. When reinstalling blade, push blade on shaft and rotate to insure clearance between fan blade and motor mounting bolt.

Transformer

1. See “Component Location” Figure 3, for location.

2. Remove outer case and back panel.

3. Remove screws securing transformer to chassis.

4. Pry upward and back to release transformer from chassis.

5. Remove wire connections from transformer.

NOTE: When placing transformer back into chassis.

Front portion of transformer must slide into base pan tab.

6. Reassemble transformer in reverse order.

Capacitor

1. See “Component Location” Figure 2, for location.

2. Remove outer case and back panel.

3. Discharge capacitor and remove wires from terminals.

4. Remove capacitor bracket mounting screw.

5. Reassemble capacitor in reverse order.

NOTE: Capacitor case must be installed into indent in

back panel.

Heater Box

1. See “Component Location” Figure 3, for location.

2. Remove outer case and back panel.

3. Remove wires connected to heating elements, convection fan, and control thermal cutout.

4. Remove screws securing heater box.

5. Slide heater box sideways from chassis.

6. Reassemble heater box in reverse order

Heating Elements

1. See “Component Location” Figure 5, for location.

2. Remove outer case and back panel.

3. Remove heater box.

4. Remove screws securing heater assembly to heater box.

5. Reassemble heating element in reverse order.

NOTE: Center heating element around convection fan

blade.

Convection Fan and Motor

1. See “Component Location” Figure 5, for location.

2. Remove outer case and back panel.

3. Remove heater box.

4. Remove left handed threaded nut on fan blade, and slide fan off.

5. Remove screws securing convection motor to heater box.

6. Reassemble convection motor in reverse order.

Fuse

1. See “Component Location” Figure 2, for location.

2. Remove outer case.

3. Replace fuse and reassemble in reverse order.

35 RS2220002 Rev. 0

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Power Cord

1. See “Component Location” Figure 3, for location.

2. Remove outer case and back panel.

3. Disconnect wiring.

4. Remove strain relief by compressing with pliers.

5. Remove power cord.

6. Reassemble power cord in reverse order.

Light Socket

1. Remove outer case.

2. Remove screws securing lamp cover bracket.

3. Unscrew light bulb from socket.

4. Disconnect wire terminals to light socket.

5. Remove screw securing light socket to light retainer.

6. Reassemble light socket in reverse order.

Replacing Oven Light Bulb

WA RNING

To avoid electrical shock which can cause severe personal injury or death, unplug power cord or open circuit breaker to oven before replacing light bulb. After replacing light bulb, restore power.

CAUTION

To avoid personal injury or property damage, observe the following:

• Allow oven and light bulb to cool.

• Wear gloves when replacing light bulb.

Tools Needed

• Protective gloves

• Phillips screwdriver

• 40-watt, 250-volt appliance bulb (available from authorized distributor or servicer)

To remove bulb, turn in direction shown.

1. Remove screw from access cover on top left

wall of oven exterior. Remove access cover.

2. Remove old bulb and replace with new bulb.

3. Replace access cover and screw by reversing

procedure in step 1.

RS2220002 Rev. 0 36

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Component Location

Touch Panel (Top)

Touch Panel (Side)

Display Module

Touch Panels/ Displays/Triacs

Figure 1

Triac #2 Heating Element B (rear)

Triac #1 Heating Element A (front)

Triac #3 Microwave

Rack Support

Rack

Magnetron

Filter

Figure 2

H.V. Board / I.S. Module

37 RS2220002 Rev. 0

Fan Blade

Diode

Fuse Block

Capacitor

Fuse

H.V. Board

Interlock Switch Assembly

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

Waveguide Duct

Magnetron Thermal Cutout

Magnetron Inlet Cover

Fan Ther m a l Cutout

Control Thermal Cutout

Heater Box

Back Panel

High Vol tage Transformer

RS2220002 Rev. 0 38

Power Cord

Figure 3

Back Panel

Fold diagram and place against blower bracket flange prior to assembling access panel.

Disassembly

WARNING

To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure.

RTD (Resistance Thermal Device)

Light Lens

Light Lens Cover

Stirrer Cover Mounting Clip

NOTE:

Heating Element

Heating assembly must be centered around the Convection Fan Blade.

Convection Fan Blade

Stirrer Blade

Stirrer Cover

Figure 4

Stirrer Assembly

Stirrer Shaft

Stirrer Insert

Control Thermal Cutout

Torque to 5 in/lbs

Convection Motor

Fan Blade

Heater Box

Slotted

Heater Assembly

Torque to 5 in/lbs Left Handed Nut

Figure 5

39 RS2220002 Rev. 0

Amana Menumaster ACE208D2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual