Amana Menumaster RC22MPS Service Manual

Service

Commercial Microwave Oven

This manual replaces RS2220001 Rev . 2. Service Manual for

Amana

Models and manufacturing

numbers in this manual

DQ22HS P1198607M DQ22HS P1107908M DQ22HS P1198617M KFC1 P1198622M MC22MP P1198701M MC22MP P1107904M MC22MP P1198703M MC22MP P1198706M MC22MPT P1198702M MC22MPT P1198704M MC22MPT P1198707M MC22MPT2 P1198705M MC22MPT2 P1198708M RC16MP P1191101M RC17 P1191104M RC17 P1198601M RC17 P1198612M RC17SD P1198623M RC20A P1198603M RC20A P1191103M RC22 P1107909M RC22 P1198604M RC22 P1198614M RC22LW P1198610M RC22LW P1198611M RC22MP P1107902M RC22MPS P1107906M RC22S P1198605M RC27 P1198608M RC27 P1198618M WDYRC P1198621M

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.

RS2220001

Revision 3

November 2000

IMPORTANT PRODUCT INFORMATION

WARNING

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

(A) Do not operate or allow oven to be operated with

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

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

(D) Any defective or misadjusted components in the

interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced or adjusted by procedures described in this manual before oven is released to the consumer.

(E) Check microwave leakage to verify compliance

with the federal performance standard should be performed on each oven prior to release to the consumer.

WARNING

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

Grounding Instructions

WARNING

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

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.

RS2220001 Rev. 3 2

Table of Contents

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

Important Information ................................................... 4

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

Microwave Leakage Testing......................................... 6

Equipment................................................................. 6

Procedure For Measuring Radiation Leakage .......... 6

Measurement With the Outer Panel Removed ......... 6

Measurement With a Fully Assembled Oven ............ 6

Record Keeping and Notification After Measurement 6

Specifications ............................................................... 7

Installation

Installation ................................................................. 8

Care and Cleaning .................................................... 8

Replacing Oven Light Bulb........................................ 8

Product Information

Antennas, Antenna Gears, Antenna Motors ............. 9

Autotransformer ........................................................ 9

Blower/Fan Assembly ............................................... 9

Power Relay.............................................................. 9

Door Interlock and Monitoring Switch ....................... 9

Grease Shield ........................................................... 9

Transformers ............................................................ 9

High Voltage Capacitor ............................................. 9

High Voltage Diode (Rectifier)................................... 9

Magnetron ................................................................. 9

Thermal Protectors ................................................... 9

Keypads .................................................................... 9

Triac .......................................................................... 9

Operating Instructions

Control Panel .......................................................... 10

Pads........................................................................ 10

Readout Display...................................................... 10

“RC” Operating Instructions

Preprogrammed Pads..............................................11

Operating Preprogrammed Pads ............................. 11

V ariable T ime Entry.................................................. 1 1

Summary of Programming Multiple Stages..............11

Operating Notes .......................................................1 1

"DQ & MC" Operating Instructions

Preprogrammed Menu Items .................................. 12

Operating Preprogrammed Menu Items ................. 12

V ariable T ime Entry................................................. 12

Operating Notes ...................................................... 12

Programming Menu Items....................................... 13

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

Specialized Programs

[QTY] Quantity (RC16, RC17, RC20, RC22, RC27) 14

[LMT] Limit (All Models) .......................................... 14

Programming P AUS................................................ 15

Using P AUS Function.............................................. 15

Option Programs (All Models Except WDYRC) ......... 15

WDYRC Operating Instructions ................................. 16

Component Testing Procedures................................. 17

Display Diagnostics

Service Codes......................................................... 21

S1 Watchdog - Membrane Touch Panel ............. 22

HOT Magnetron Overheating............................... 22

CS Current Sense............................................... 22

PCE1 Checksum ................................................. 23

PCE5 Communication Failure ............................. 23

PCE6 Communication Failure ............................. 23

HI High Line Voltage ........................................... 23

LO Low Line Voltage............................................ 23

Service Test – All Models Except WDYRC

Accessing Service Test Mode ................................. 24

H.V. System Test..................................................... 24

Diagnosing Individual H.V . System Components.... 24

Door Cycles and Magnetron Hours......................... 25

Power Test (Traditional 1 Liter Test)........................... 26

Troubleshooting

Initial Power Up ....................................................... 27

Stand By Condition ................................................. 28

Cook Condition ....................................................... 29

Disassembly

Latch Handle........................................................... 30

Door ........................................................................ 30

Outer Case.............................................................. 30

Inner Door Ring Assembly ...................................... 30

Hinge....................................................................... 30

Bottom Shelf ........................................................... 31

Grease Shield ......................................................... 31

Outer Case.............................................................. 31

T op Keypad ............................................................. 31

Side Keypad............................................................ 31

Low Voltage Circuit Board....................................... 31

Top Antennas .......................................................... 32

Top Antenna Motor.................................................. 32

Antenna Matching ................................................... 32

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

Top Rear Magnetron ............................................... 33

Top Front Magnetron............................................... 33

Bottom Magnetron .................................................. 34

Magnetron and Control Thermal Protectors (TCO). 34

Bottom Access Panel.............................................. 34

Bottom Stirrer Motor................................................ 34

Bottom Antenna ...................................................... 35

Back Panel.............................................................. 35

Blower Wheel and Motor......................................... 35

Fan Blade................................................................ 36

H.V . Board............................................................... 36

Cavity Thermal Protector (TCO) ............................. 36

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

Component Location ............................................... 36

Wiring Diagrams and Schematics........................ 39–60

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

3 RS2220001 Rev. 3

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

To 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 performing 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 1-800-628-5782 first, if no answer contact the following number.

CONSUMER AFFAIRS DEPT. OR 1-319-622-5511or (1-800-843-0304) AMANA APPLIANCES, 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 R N IN 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.

RS2220001 Rev. 3 4

Important Safety Information

CAUTION

Read the following information to avoid possible exposure to microwave radiation.

The basic design of the Amana 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. The oven should never to operated if the door does not fit properly against the seal, hinges or hinge bearings are damaged or broken; the 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.

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

A. Tell the user not to operate the oven. B. Contact Amana Refrigeration, Inc. immediately.

5. Always have oven disconnected when the 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 these capacitors and the discharge could cause a reflex action which could make you injure yourself.

7. In the area of the transformer, capacitor, diode, and magnetron there is HIGH VOLTAGE. When the unit is operating - keep this 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. IMPORTANT : Before returning a microwave to a customer, check for proper switch interlock action. The primary and secondary switches MUST open when the door handle is actuated. The monitor switch MUST close at 1/4 inches when the door is opened. (See Service Section for detailed instructions.

10.Before returning a microwave to a customer, verify the door spacing is reasonably uniform along the top, bottom, and sides, and that it measures 1/8-inch or less.

1 1.The Amana 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.

12.To ensure that the 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 on the following page. The maximum leakage level allowed is 4mw/cm2 .

13.If servicer encounters an emission reading over 4mw/cm2 the servicer is to cease repair and contact Amana Service Department immediately for further direction. Amana Refrigeration, Inc. will contact the proper Government Agency upon verification of the test results.

5 RS2220001 Rev. 2

Microwave Leakage Testing

WARNING

Check for radiation leakage after servicing. Should the leakage be more than 4mW/cm2 inform Amana Refrigeration, Inc. 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 in the customer’s home.

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.

• To 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.

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

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

2. Set the radiation monitor to 2450 MHz and use it

following the manufacturer’s recommended test procedure to assure correct results.

3. While measuring the leakage, always use the two

inch (5 cm) spacer supplied with the probe.

4. 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.

Measurement With the Outer Panel Removed

DANGER

Avoid contacting any high voltage components.

Whenever you replace the magnetron, measure for radiation leakage before the outer panel 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 .

RS2220001 Rev. 2 6

Specifications

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* Suffix designates different features in similar ovens. ** MC22MP uses 20A Hubbell 320P6WM2 plug. ** MC22MPT uses 20A Twist-Loc NEMA # L6-20P plug. ** MC22MPT2 uses 20A Hubbell HBL2321S plug.

7 RS2220001 Rev. 2

Installation

Unpacking Oven

• Inspect microwave oven for damage such as dents in door or inside oven cavity.

• Report any dents or breakage to source of purchase immediately .

Oven Placement

• Do not install microwave oven next to or above source of heat, such as pizza oven or deep fat fryer. Excessive heat may cause oven to operate improperly and shorten life of electrical parts.

• Allow air flow around unit. Leave at least 1 1/2 inches between air discharge on back of oven and back wall. Restricted air flow may cause oven to operate improperly and shorten life of electrical parts.

Care and Cleaning

Interior, Exterior and Door

1. Wash surfaces with a soft, clean cloth and

mild detergent diluted in warm water. Remove excess water from cloth before wiping oven. If desired, boil a cup of water in oven to loosen soil before cleaning.

2. Do not use cleaners containing ammonia.

3. Never pour water into oven bottom.

4. Do not use water pressure type cleaning systems.

Discharge Air Vents

There will be a slight buildup of cooking vapors along discharge louvers in back of oven on left side as viewed from the front. Clean air vent with damp cloth. Dry thoroughly .

Air Filter

Air filter is located under oven directly below door.

1. Remove air filter by turning thumb screws

counterclockwise, located on outside edges of filter.

2. Wash filter with mild detergent diluted in warm water.

Rinse and dry thoroughly .

3. Replace filter by reversing step 1.

Splatter Shield

Splatter shield keeps top of oven and antenna from getting dirty. Remove soil from shield with damp cloth.

NOTE: When removing and replacing splatter shield, be

careful not to bend antenna.

1. Unplug oven before removing splatter shield to stop antenna from rotating.

2. Remove shield by placing thumbs in front of shield. Press firmly toward back and carefully lower front of shield away from antenna. Pull shield forward, out of back slots and out of oven.

3. W ash shield in hot, soapy water. Rinse and dry thoroughly .

4. Replace splatter shield by fitting tabs into slots at top of oven back. Lift and press front of shield until shield snaps into place.

Important

• Do not wash splatter shield in dishwasher.

• Do not use abrasive cleaners

Replacing Oven Light Bulb

WARNING

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.

T ools Needed

• Protective gloves

• Phillips screwdriver

• 40-watt, 250-volt appliance bulb (available at Amana

Authorized Service Centers - p/n A0282802)

CAUTION

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

1. Allow light bulb to cool.

2. Wear gloves when replacing light bulb.

RS2220001 Rev. 2 8

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

2. Remove bulb.

3. Replace bulb.

4. Replace access cover and screw by reversing procedure in step 1.

Product Information

Antennas, Antenna Gears, Antenna Motors

Properly distributes microwave energy throughout the cavity .

Autotransformer

This transformer provides step-up voltage for the blower motor, antenna motors, and oven light.

Blower/Fan Assembly

Circulates cooling air throughout the machine compartment and cavity .

Power Relay

The power relay is actuated by the digital timer. The contacts on this relay complete one side of the power line to the high voltage power transformer.

Door Interlock and Monitoring Switch

WA RN IN G

All Models Except RC27 and KFC1 When the line fuse is blown the Interlock Switch Module must be replaced.

Grease Shield

Covers and protects the top antennas.

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.

T ransformers

Two or three high voltage transformers are used in the unit. Each supplies high voltage A.C. for operation of the magnetron tubes.

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 the voltage from A.C. to D.C. It passes current in one direction and blocks it in the other. Also refered to as a rectifier.

Model RC27 and KFC1 When the line fuse is blown the Interlock Switch Assembly and Power Relay must be replaced.

Door Interlock Switch

This microwave oven has a monitoring system to assure proper operation of the safety interlock switch.

Door Interlock Switch Assembly

The interlock switch assembly located behind the cavity front, is activated by the door guide and door hook attached to the door.

The door interlock switch assembly consist of switches that control various functions within the oven. The monitor switch assures proper operation of the safety interlock system.

The primary interlock switch and secondary interlock switch control voltage to various components.

Magnetron

With a filament voltage and the high D.C. voltage from the output of the H.V . capacitor , diode junctioning the magnetron will put out an electomagnetic radio frequency of 2450 MHz to heat the load in the oven.

Thermal Protectors

All magnetrons in this oven are protected by resettable thermal cut-outs. These thermal cut-outs are mounted directly on the body of the magnetron. If one of these thermal cut-outs open, the oven will either indicate an error code in the display or operate at reduced power.

Keypads

Allows customer operation and programming of oven.

Triac

The triac is controlled (gated) by the high voltage and low voltage circuit boards. The triac controls one side of the power line going to the high voltage power transformers.

9 RS2220001 Rev. 2

Operating Instructions

Control Panel RC16MP, RC17, RC17SD, RC20, RC22, RC27, KFC1

DQ22, MC22

DELETE

PAUSEADD

STATUS

POWER

LEVEL

HOLD

TIME

ENTRY

READOUT DISPLAY

Pads

MENU 1

RC22, RC27, KFC1)

MENU 1, MENU 2, MENU 3

Use for independent cooking programs. For example,

MENU 1 could be breakfast items; MENU 2, lunch items; MENU 3, dinner item;

Numbers 1– 0

Selects the desired menu item and quantity program for preset programs. Numbers are also used to enter cooking times during programming mode. Press directly on digit to activate number pads.

ADD

Use to make a change to preset number pads.

PAUSE

Use to stop microwave power halfway through cooking stage and as reminder to manipulate food.

POWER LEVEL

Use to select power level. If no power level is selected, oven operates at 100% power.

HOLD

Use to operate oven with no microwave energy for programmed time.

DELETE

Use to delete preprogrammed number pads, current heating stages and power levels.

STATUS

Use in optional programming to change options. Press to move through stages 1-4 of programming.

START

Use to save changes to permanent memory .

STOP/RESET

Exits programming mode and stops cooking during cooking cycle.

TIME ENTRY

Used to program times not in oven memory . Time entry overrides preset times.

QUANTITY (

Use to select a quantity greater than 1.

MENU 2 (

RC16MP, RC17, RC17SD, RC20,

MENU 4 (

and

MENU 4, desserts.

RC16MP, RC17, RC20, RC22, RC27)

DQ22, MC22)

Readout Display

*“

EOC

” (End of Cycle)

Lights at end of cooking cycle. *“

PAUS

” (Pause)

Lights during cooking pause. “P”

Lights when viewing stage with an enabled pause or when entering programming mode.

“

POWER

”

Lights when oven is in a cook cycle. *“

COOK LEVEL

" Lights when viewing stage with reduced power or hold. Power level digit or H for hold display .

“

MENU 1

Lights active menu. *“

ITEM

”

” or “

MENU 2

”

RESET START

Lights when number is pressed to select item.

*“

LMT

” (Limit) Flashes when either user time limit or maximum time limit is exceeded.

*“

QTY

” (Quantity) (DQ22 and MC22 Only) Flashes until desired quantity is entered or 15 second time limit expires. Continuously lights during cooking cycle when quantity greater than 1 is selected.

*“

STG

” (Stage) indicator Lights when multiple cooking stages exist for the selected item.

ITEM STG QTY

ADD DEL P LMT MENU1 MEN U2 MENU3 MENU4

2 3 4

Readout Display

1 2 3 4 5 6 7 8 9 0

POWER

COOK LEVEL

RS2220001 Rev. 2 10

“RC” and KFC1 Operating Instructions

Preprogrammed Pads

Oven contains two menus with ten preset number pads each. Heating times and power levels can be adjusted to fit menu requirements. See separate programming instructions packed with oven.

Number pads come factory-set to operate at full power for the following times. programmed identically at the factory .

Instructions are written for factory programmed ovens.

RC16MP, 17, 20, 22, 27 RC22LW only

Pads Cooking Time Cooking Time

1 10 seconds 5 seconds 2 20 seconds 8 seconds 3 30 seconds 13 seconds 4 45 seconds 26 seconds 5 1 minute 14 seconds 6 1 1/2 minutes 7 seconds 7 2 minutes 10 seconds 8 3 minutes No Time 9 4 minutes No Time 0 5 minutes No Time

On KFC1 units refer to Owners Manual for specific cooking times.

Ovens that are reprogrammed may not respond exactly as described below.

MENUS 1

and 2 pads are

Operating Preprogrammed Pads

1. Open oven door and place food in oven. Display shows “door”. Fan and light operate.

2. Close oven door. Display shows “MENU” and “ITEM” (flashing). Press desired menu pad if different than display .

NOTE: Change quantity by following procedure in step

3. If one is desired, proceed to step 4.

3. Press

4. Press desired number pad and oven operates.

5. Oven stops, display shows “EOC”, and signal

6. Open oven door.

QUANTITY

Cooking times are calculated automatically . Display shows item selected and heating time

counts down. Display shows “POWER” when microwave energy is present. Display counts down cooking time.

sounds when timing sequence is finished.

pad to increase quantities.

Variable Time Entry

1. Open oven door and place food in oven. Display shows "door". Oven fan and light operate.

2. Close oven door. Display shows "MENU" and “ITEM” (flashing). Press desired menu pad if different than display .

3. Press

4. Press numbers to enter desired cooking time.

NOTE: Change power level by following procedure in

5. Press

6. Press numbers to enter desired power level. For

7. Press

8. Oven stops and signal sounds when timing

9. Open oven door and remove food.

TIME ENTRY

steps 5-6. If 100 percent power is desired, proceed to step 7.

POWER LEVEL

LEVEL” and current power level. example, press 2 pad is 20 percent power.

START

shows “POWER” when microwave energy is present. If power level was programmed, display shows “COOK LEVEL” . Display counts down cooking time.

sequence is finished. Display shows “EOC”.

pad. Display shows “0000”.

pad. Display shows “COOK

pad and oven operates. Display

Summary of Programming Multiple Stages

1. Open oven door.

2. Press pad 1 for five seconds.

3. Press desired menu pad.

4. Press desired number pad.

5. Enter desired cooking time.

6. Press

7. Enter desired cooking time and power level.

NOTE: Repeat steps 6 & 7 for each stage.

8. Press

9. Press

NOTE: The display will show the total 4 stage cooking

STA TUS

ST ART RESET

programming.

time.

pad.

pad to lock new program.

pad or close oven door to exit

Operating Notes

If door is opened microwave energy ceases. Blower continues to operate. Close door and press pad to continue oven operation and countdown timing.

Microwave energy ceases if pressed once while oven is operating, but display shows countdown time. Press oven operation and countdown timing. Oven stops and current program is cancelled if pressed twice.

If preset pad is pushed immediately after door is opened, then closed, a slight delay occurs before oven starts and timing countdown begins.

STOP/RESET

START

STOP/RESET

START

pad is

pad to continue

pad is

11 RS2220001 Rev. 2

“DQ & MC” Operating Instructions

Preprogrammed Menu Items

Oven can program up to 99 separate menu items. Quantities from one to nine for each menu item may be programmed. Each item may be programmed for up to 4 independent cooking stages. The 99 programmed items may be distributed or organized into groups by assigning them to any of the 4 available menus.

Operating Preprogrammed Menu Items

1. Open oven door and place food in oven. Display shows "door". Oven fan and light operate.

2. Close oven door. Active menu item indicator lights up. "ITEM" indicator flashes.

3. Press desired menu pad if different than menu displaying.

4. Press two numbers for menu item to be cooked. For example, if menu item number 3 is selected, press 0, and 3. "ITEM" indicator lights up. "QTY" and "LMT" indicators and user defined limit flash in display. This is maximum quantity of items that can be programmed to cook in the oven at one time.

5. Press number pad to enter quantity. Quantity selected, power level for stage 1 and total cooking time for all stages display. Cooking begins immediately after quantity is entered.

NOTE: If quantity selected is not within quantity limit,

signal sounds. Repeat step 4.

6. When cycle is complete, oven stops and signal sounds. "EOC" displays.

7. Open oven door and remove food.

Variable Time Entry

1. Open oven door and place food in oven. Display shows "door". Oven fan and light operate.

2. Close oven door. Display shows active menu and "ITEM".

3. Press

4. Press numbers to enter desired cooking time.

Change power level by following procedure in steps 5–6. If 100 percent power is desired, proceed to step 7.

5. Press

6. Press numbers to enter desired power level. For

7. Press

8. Oven stops and signals when timing sequence is

9. Open oven door and remove food.

TIME ENTRY

"0000".

POWER LEVEL

"COOK LEVEL" and current power level. example, press 2 pad for 20 percent power.

START

shows "POWER" when microwave energy is present. If power level was programmed, display shows "COOK LEVEL". Display counts down cooking time.

finished. Display shows "EOC".

pad. Display shows

pad and oven operates. Display

Operating Notes

If door is opened, oven energy ceases. Blower continues to operate. Close door and press START to continue oven operation and countdown timing.

If RESET is pressed once while oven is operating, oven energy ceases, but countdown time remains in display. Press START to continue oven operation and countdown timing. If RESET is pressed twice, oven stops and current program cancels.

When unit is plugged in or repowered after the loss of electricity, it will take several seconds before dashes and menu indicator display. Once displayed, unit is operational.

RS2220001 Rev. 2 12

“DQ & MC” Programming Instructions

Programming Menu Items

1. Open oven door. Display shows "door". If door is closed or RESET is pressed before finishing programming sequence, oven exits programming mode.

2. Press and hold pad number 1 for five seconds. After five seconds, signal sounds. "P" and active menu display.

3. Press ADD to begin programming.

4. Press desired menu pad to be preprogrammed, if not displaying. "MENU" indicator displays.

5 Press two number pads to be programmed. "QTY"

(quantity) and "LIMIT" indicators and the current quantity limit flash.

NOTE: To change quantity limit:

• Press hidden enable pad. Locate hidden enable pad to the immediate left and slightly down from the MENU 1 pad. Signal sounds.

• Press number pad to enter quantity limit. Maximum quantity limit for each menu item is nine.

• Press START to save new quantity limit.

6. Press number pad to enter quantity. Quantity selected, program time and power level for stage 1 display . "STG" (stage) indicator and stage numbers with nonzero times also light up if multiple stages exist.

NOTE: If quantity selected is not within quantity limit,

signal sounds. Repeat step 5.

7. Press numbers to enter desired cooking time.

8. Press POWER LEVEL. "COOK LEVEL" indicator and current power level display .

9. Press numbers to enter power level if power level other than 100% is desired. New power level displays. For example, press pad number 2 for 20 percent power.

10.Press START pad to lock new heating time and power level in oven memory . Display shows "P".

11.Press RESET pad or close oven door to exit programming mode.

Programming Multiple Stages

1. Complete steps 1 - 9 of "Programming Menu Items".

2. Press

3. Press number pads to enter desired cooking time

4. Repeat steps 3 - 4 for additional stages.

5. Complete steps 10 - 11 of "Programming Menu

STATUS

lowest to highest (1 to 4). Display shows "PX" for one second followed by time and power level for selected stage. "P" represents program, "X" represents stage 1,2,3 or 4.

and power level.

Items".

pad to move through stages from

13 RS2220001 Rev. 2

Specialized Programming

[QTY] Quantity (RC16MP, RC17, RC17SD, RC20, RC22, RC27, KFC1)

1. Open oven door and place food in oven.

2. Close oven door.

3. Press QUANTITY pad.

• Oven is always set for ................. QTY1

• Press QTY once .......................... QTY2

• Press QTY twice.......................... QTY3

• Press QTY three times ................ QTY4

4. Press START pad. NOTE: The oven will automatically adjust the time

setting for the QTY. programmed.

[LMT] Limit (All Models)

Maximum amount of time a customer can program a pad (number).

When time LMT is changed the time will change for all pads (numbers) in MENU1 or MENU2.

1. Enter program mode.

2. Press hidden enable pad.

3. Press MENU1 or MENU2. NOTE: Display will show current maximum time [LMT.

4. Enter new time LMT.

5. Press MENU1 or MENU2.

6. Close door or press reset pad.

• If a time higher than the max. time limit is entered, display will flash LMT and maximum time. Display will then reset to “0000”.

• LMT does not affect time entry operation.

PAUS (Pause) (All Models)

Used to stop microwave power halfway through the cooking cycle as a reminder to manipulate food.

Programming PAUS

1. Open oven door.

2. Press pad 1 for five seconds to enter programming mode.

3. Press the desired menu pad (exp: MENU1).

4. Press the desired number pad needing reprogrammed (exp: pad number 1) .

5. Press POWER LEVEL pad if power level other than 100% is desired. Enter desired power level. If 100% power is desired proceed to step 6.

6. Enter desired cook time.

7. Press Pause pad.

8. Press start.

9. Press reset pad or close oven door to exit programming mode.

Using PAUS Function

1. Open door, place food in oven.

2. Close oven door.

3. Press desired menu pad (exp: MENU1).

4. Press desired number pad (exp: pad number 1).

5. Oven starts. Display counts down.

6. Oven stops halfway through the cook cycle (oven displays P AUS and beeps 3 times).

RS2220001 Rev. 2 14

7. Open door and manipulate food.

8. Close door.

Option Progams (All Models Except WDYRC)

1. Open oven door.

2. Press 1 pad for five seconds.

RC Models

Hidden Enable

QUANTITY

DELETE

PAUSEADD

STATUS

DQ & MC Models

ADD

DELETE

PAUSE

STATUS

Hidden Enable

3. Press hidden enable pad. NOTE: Display will indicate option code. Example:

OP:1 1

4. Press

5. Press

ST ART STATUS

pad to view active option codes.

pad to change option codes.

6. Repeat steps 4 and 5 to change additional options.

7. Press hidden enable pad to return to programming mode.

8. Press

RESET

pad or close oven door.

Option Description Code

End of cycle signal tone

Tone when pad is pressed

Control panel resets when door is opened

End of cycle signal volume

User time limit

Off OP:10 Continuous tone* OP:11 5 continous tones OP:12 5 tones, 5 cycles OP:13 Off OP:20 On* OP:21

Off* OP:30

On OP:31 Loud* OP:40 Medium OP:41 Off OP:50 On* OP:51

* AS SHIPPED FROM FACTORY

15 RS2220001 Rev. 2

WDYRC Operating Instructions

PAUS (PAUSE)

Display

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

ITEM

ADD DEL

"EOC" (End of Cycle)

"POW ER " Lights when microwave power is supplied to oven cavity.

Pads Description

START

RESTART

Pad Time Power Lev el

1 BAG

PITA

2 BAG

PITA

1 DOZ

BUN

2 DOZ

BUN

STG QTY

2 3 4 P

LMT

MENU1 MENU2 MENU3 MENU4

Counts down heating time.

Lights at end of heating cycle. Remains in display until door is opened.

Begins heating cycle. If cycle is paused, new heating cycle begins.

If door is opened and heating is paused, resumes paused heating cycle.

25 sec. 100%

50 sec. 100%

30 sec. 100%

1 min. 100%

START

POWER

COOK

LEVEL

is pressed while heating

RESTART

pad

Connecting Power

When unit is plugged in or powered after the loss of electricity , it will take several seconds before dashes and menu indicator display . Once displayed, unit is operational.

Interrupting Operation

Open oven door to interrupt operation. Oven fan continues to operate. Close door and press

REST AR T

pad to resume oven operation.

Canceling Mistakes

If oven door is open and time shows in display , close oven door and press cycle or a

START

cycle is paused and not restarted, remaining time clears in 15 seconds. Oven door must be opened and closed before starting a new heating cycle.

RS2220001 Rev. 2 16

RESTAR T

pad to resume heating

to begin new heating cycle. If heating

Heating with Preprogrammed Pads

Oven has 4 preprogrammed pads.

1. Open oven door and place food in oven. Display shows “door”.

• Fan and light operate.

2. Close oven door. Display shows “MENU” and “ITEM”.

• If oven display does not show “ITEM”, pads do not

accept entries. Open and close oven door to activate pads.

3. Press desired a

• Heating time counts down.

• Display shows “POWER” when microwave energy

is present.

4. Oven stops and signal sounds when timing sequence is finished.

• Display shows "EOC".

5. Open oven door.

Wendy’s Recommended Performance Test

See “Owner’s Manual”.

ST AR T

pad and oven operates.

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 B5684106

MT2

MT1 GA TE

B5795306 B5684118 Diode

Triac Disconnect wires to triac.

Capacitor

  

Disconnect all wires from TCO. Measure resistance across terminals. Magnetron TCO (.250 Cavity TCO Control TCO (.187 terminals)

Discharge Capacitors

Remove diode lead from capacitor and connect ohmmeter.

Reverse leads for second test.

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

Discharge Capacitors



terminals)

Open at 280°F and closed at 180°F Opens at 262°F (128°C) Open at 280°F and closed at 180°F Infinite resistance should be measured in one direction and 50KΩ or more in the opposite direction.

NOTE: Analog meter must contain a battery of 6 volts minimum.

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

Infinite Ω Approximately 40 Ω or more Infinite Ω Infinite Ω

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

Also check between each terminal and capacitor case.

Snubber Assembly Disconnect wires to snubber.

Measure resistance across terminals.

Magnetron

Antenna motor Remove all wires from terminals.

Blower Motor Remove all wires from motor.

Discharge Capacitors

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

Measure resistance from: Terminal to terminal

Measure resistance across coil.

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

Infinite Ω

Between Terminals: Less than 1 Ω 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 re-test.

Approximately 10,000 Ω

Approximately 34 Ω

Lamp 240 VAC 40 Watts

Measure resistance

Approximately 120 Ω

RS2220001 Rev. 217

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

(Lo)

Com

Transformer

230

(Hi)

208 V

(Lo)

230 V

(Hi)

Discharge Capacitors

Remove all wires from terminals.

Measure resistance from:

Terminal 230 (HI) to Com Terminal 208 (LO) to Com Terminal 5 to 6 Terminal 4 to Ground screw on transformer Terminal 4 to any other terminal

Ω

65−80

Ω

Infinite resistance should be indicated, if not replace transformer.

208

For larger illustration

see page 33 in Disassembly Procedures

Auto Transformer

230

Interlock switch Type 1

Interlock switch Type 2

Interlock switch Type 3

230

208

Door Open

Dummy

Secondary

Logic/Primary

Monitor

Door closed

Discharge Capacitors

Remove all wires from terminals. Measure resistance from:

230 to 0 208 to 0

Disconnect wires to switch With door open measure resistance from:

Terminal 2 to terminal 3

Terminal 4 to terminal 5

Terminal 7 to terminal 8

3 4

4 5

With door closed measure resistance from:

Terminal 2 to terminal 3

Terminal 4 to terminal 5

Terminal 7 to terminal 8

Disconnect wires to switch With door open measure resistance from:

COM to N.O.Secondary COM to N.O.Primary COM to N.C.Monitor

With door closed measure resistance from: COM to N.O.Secondary COM to N.O.Primary COM to N.C.Monitor

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

Terminal 2 to 3 Secondary Terminal 4 to 5 Primary

Terminal 7 to 8 Monitor

With door closed measure resistance from: Terminal 2 to 3 Secondary

Terminal 4 to 5 Primary Terminal 7 to 8 Monitor

Ω

Infinite

Ω

Infinite

Ω

Indicates continuity

Indicates continuity Indicates continuity Infinite

Ω

Infinite Ω Infinite Ω Indicates continuity

Indicates continuity Indicates continuity Infinite Ω

Infinite Ω Infinite Ω Indicates continuity

Indicates continuity Indicates continuity Infinite Ω

RS2220001 Rev. 2 18

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