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

(C) 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.

(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: [phone]
Facsimile: [phone]
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

SH22QDSH22QD

SH22QDSH22QD

SH22QD

71CR71CR

71CR71CR

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CAegatloV032/802032/802032/802032/802032/802032/802032/802

)tinuelgnis(egarepmA02020202020302

ycneuqerFzH06zH06zH06zH06zH06zH06zH06

dednuorgeriw3,esahPelgniSXXXXXXX

elcatpeceRR02-6R02-6R02-6R02-6**R03-6R02-6

gulPP02-6P02-6P02-6P02-6**P03-6P02-6

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)507CEI(ygreneevaworcimlanimoNsttaw0061sttaw0071sttaw0002sttaw0022sttaw0502sttaw0072sttaw0002

ycneuqerFgnitarepOzHM0542zHM0542zHM0542zHM0542zHM0542zHM0542zHM0542

PM61CRPM61CR

PM61CR

71CR

DS71CR

A02CRA02CR

A02CRA02CR

A02CR

22CR

WL22CR

S22CR

PM22CR

SPM22CR

PM22CMPM22CM

PM22CMPM22CM

PM22CM

TPM22CM

2TPM22CM

1CFK1CFK

1CFK1CFK

1CFK
72CR

CRYDWCRYDW

CRYDWCRYDW

CRYDW

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noitpmusnoCrewoPnoitpmusnoCrewoP

noitpmusnoCrewoP

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htdiW"61/331"61/331"61/331"61/331"61/331"61/331"61/331

thgieH"4/38"4/38"4/38"4/38"4/38"4/38"4/38

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detarC.sbl101.sbl101.sbl101.sbl411.sbl411.sbl411.sbl411

* 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

!

!

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

MENU

1

MENU

3

MENU

2

MENU

4

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.

or

MENU 2 (

RC16MP, RC17, RC17SD, RC20,

or

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. 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

MENU

1

MENU

2

QUANTITY

DELETE

PAUSEADD

STATUS

DQ & MC Models

MENU

2

MENU

4

ADD

DELETE

PAUSE

STATUS

Hidden
Enable

MENU

1

MENU

3

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)

6

5

4

Com

Transformer

230

(Hi)

3

208 V

(Lo)

230 V

(Hi)

Discharge Capacitors

Remove all wires from terminals.

5

Measure resistance from:

6

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

4

1

Ω

1

Ω

<1

Ω

65−80

Ω

Infinite resistance should be indicated,
if not replace transformer.

0

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

7

2

8

5

2

7

4

3

5

230

208

0

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

1

1

Terminal 4 to terminal 5

2

2

Terminal 7 to terminal 8

3

3
4

4
5

5

With door closed measure resistance from:

6

6

Terminal 2 to terminal 3

7

7

Terminal 4 to terminal 5

8

8

Terminal 7 to terminal 8

9

9

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

3

Terminal 7 to 8 Monitor

4

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

8

Terminal 4 to 5 Primary
Terminal 7 to 8 Monitor

44

Ω

43

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