Amana Menumaster HDC5112 Service Manual
Service
International Commercial
Microwave Oven
Service Manual for
Amana
®
This Base Manual covers Commercial
Microwave Ovens with 120/230 V, 50 Hz.
Refer to individual Technical Sheet for
information on specific models.
This manual includes, but is not limited to
the following:
HDC511
HDC514
HDC518
DEC11E
DEC14E
DEC18E
UC11E
UC14E
UC18E
UHDC511
UHDC514
UHDC518
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.
RS5320013
Revision 0
August 2000
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Important Information
Pride and workmanship go into every product to provide our customers with quality products. It is possible, however,
that during its lifetime a product may require service. Products should be serviced only by a qualified service
technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools,
parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.
Important Notices for Consumers and Servicers
WARNING
T o avoid risk of serious injury or death, repairs should not be attempted by an unauthorized personnel, dangerous
conditions (such as exposure to electrical shock) may result.
CAUTION
Amana will not be responsible for any injury or property damage from improper service procedures. If prefroming
service on your own product, assume responsibility for any personal injury or property damage which may result.
To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this
product. For further assistance, please contact:
CONSUMER AFFAIRS DEPT. OR 1-319-622-5511
AMANA REFRIGERATION, INC. CALL and ask for
AMANA, IOWA 52204 Consumer Affairs
If outside the United States contact:
AMANA
ATTN: CONSUMER AFFAIRS DEPT
2800 220th Trail
AMANA, IOWA 52204, USA
Telephone: (319) 622-5511
Facsimile: (319) 622-2180
TELEX: 4330076 AMANA
CABLE: "AMANA", AMANA, IOWA, USA
Recognize Safety Symbols, Words, and Labels
DANGER
DANGER - Immediate hazards which WILL result in severe personal injury or death.
WA RNIN G
WARNING - Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION
CAUTION - Hazards or unsafe practices which COULD result in minor personal injury or product or property
damage.
RS5320013 Rev. 0 2
Important Product Information
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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
T o avoid risk of electrical shock, injury, or death, make
sure these earthing instructions are followed.
Earthing Instructions
WARNING
Do not remove earthing prong when installing earthed
appliance in a home or business that does not have
three wire earthing receptacle, under no condition is
earthing prong to be cut off or removed. It is the
personal responsibility of the consumer to contact a
qualified electrician and have properly earthed 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 earthed three prong receptacle or
the two prong adapter properly earthed by a qualified
electrician in accordance with appropriate electrical
codes.
Servicing of Earthed Products
The standard accepted color coding for earthing wires is
GREEN or GREEN WITH YELLOW STRIPE. These
earth leads are NOT to be used as current carrying
conductors. It is extremely important that the technician
replace any and all earths prior to completion of the
service call. Under no condition should earth 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.
Amana Appliances • 2800 220thTrail • Amana, Iowa • 52204-0001 • Printed in the U.S.A.
3 RS5320013 Rev. 0
Table of Contents
Important Product Information ..................................... 2
Impo rtant I nform ation .................................................. 3
Important Safety Information ....................................... 5
Product Information
Antenna Blade......................................................... 9
Blower/Fan Assembly.............................................. 9
Grease Shield.......................................................... 9
Door Interlock and Monitoring Switch....................... 9
Auto Transformer ..................................................... 9
Transformer High V oltage......................................... 9
High V oltage Capacitor ............................................ 9
High V oltage Diode (Rectifier) .................................. 9
Magnetron ............................................................... 9
Thermal Cutout Protectors....................................... 9
T ouch Panels........................................................... 9
Triac ........................................................................ 9
Antenna Motor(s)..................................................... 9
Installation
Unpacking Oven .................................................... 10
Oven Placement .................................................... 10
Radio Interference.................................................. 10
Grounding Instructions........................................... 10
Care and Cleaning
Changing Oven Light Bulb...................................... 11
Cleaning Interior , Exterior, and Door....................... 1 1
Cleaning Splatter Shield ........................................ 1 1
Cleaning Air Intake Filter ....................................... 12
Cleaning Discharge Air V ents ................................ 12
Control Panel Features ............................................. 13
Displays
Cooking Methods................................................... 14
Cooking Displays................................................... 14
Programming Displays........................................... 14
Operation
Interrupting Operation ............................................ 15
Canceling Mistakes ............................................... 15
Operating Preprogrammed Pads............................ 15
Using X2 Pad......................................................... 15
Manual Time Entry ................................................ 15
Programming Instructions
Memory Pads ........................................................ 16
Multiple Cooking Stages........................................ 16
X2 Quantity Feature............................................... 16
User Options ......................................................... 17
Component T esting Procedures ................................ 18
T est Modes
Power T est............................................................. 21
Microwave Energy Leakage T esting
Equipmen t ............................................................. 22
Procedure for Measuring Radiation Leakage.......... 22
Measurement With the Outer Case Removed ........ 22
Measurement With a Fully Assembled Oven ......... 22
Record Keeping and Notification
After Measurement ................................................ 22
Troubleshooting
Initial Power Up .................................................. 23
Standby Condition .............................................. 24
Cook Condition................................................... 25
Disassembly
Door Removal ........................................................ 26
Inner Door/Window Removal .................................. 26
Door Disassembly ................................................. 26
Door Handle........................................................... 26
Hinge ..................................................................... 26
Interlock Switch Replacement/DoorAdjustment ..... 27
Outer Case ............................................................ 28
Back Panel............................................................ 28
Grease Shield........................................................ 28
Antenna Assembly–T op......................................... 28
Antenna Motor–T op................................................ 28
Oven Tray Removal ................................................ 28
Antenna Assembly–Bottom ................................... 28
Antenna Motor–Bottom.......................................... 29
T ouch Panel Assembly.......................................... 29
Control Board ........................................................ 29
Interlock Switch Assembly .................................... 29
Magnetron Cutout (TCO) ........................................ 29
Tr ia c ...................................................................... 29
Diodes ................................................................... 29
Magnetron ............................................................. 30
Cavity Thermal Cutout Replacement ...................... 30
Fuse ...................................................................... 30
Blower Wheel and Motor........................................ 30
Fan Blade .............................................................. 31
Line Filter .............................................................. 31
Auto Transformer ................................................... 31
High Voltage T ransformer ....................................... 31
Capacitor ............................................................... 31
Power Cord............................................................ 31
Lamp Receptacle................................................... 31
Replacing Oven Lamp ............................................ 31
Component Location
Figure 1 .............................................................. 32
Figure 2 .............................................................. 33
Figure 3 .............................................................. 34
RS5320013 Rev. 0 4
Important Safety Information
5 RS5320013 Rev. 0
Important Safety Information
RS5320013 Rev. 0 6
Important Safety Information
7 RS5320013 Rev. 0
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Important Safety Information
CAUTION
Read the following information to avoid possible
exposure to microwave radiation:
The basic design of the Amana or Menumaster
microwave ovens make it an inherently safe device to
both user and servicer. However, there are some
precautions which should be followed when servicing
the microwave oven to maintain this safety . These are
as follows:
1. Always operate the unit from an adequately earthed
outlet. Do not operate on a two-wire extension cord.
2. Before servicing the unit (if unit is operable), perform
the microwave leakage test.
3. The oven should never be operated if the door does
not fit properly against the seal, the hinges or hinge
bearings are damaged or broken; the choke is
damaged, (pieces missing, etc.); or any other visible
damage can be noted. Check the choke area to
ensure that this area is clean and free of all foreign
matter.
4. If the oven operates with the door open and
produces microwave energy , take the following
steps.
A. Tell the user not to operate the oven.
B. Contact Amana Appliances immediately .
5. Always have the oven disconnected when the outer
case is removed except when making the "live" tests
called for in this Service Manual. Do not reach into
the equipment area while the unit is energized.
Make all connections for the test and check them for
tightness before plugging the cord into the outlet.
6. Always earth the capacitors on the magnetron filter
box and H. V. Capacitor with an insulated-handle
screwdriver before working in the high voltage area
of the 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
earthing, etc.
8. Do not for any reason defeat the 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 is actuated. The monitor switch
MUST close at a 1/4" when the door is opened.
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" or
less.
1 1.The Amana microwave oven should never be
operated with:
• Any components removed and/or bypassed.
• Any of the safety interlocks found to be
defective.
• Any of the seal surfaces defective, missing,
or damaged.
12.To ensure that the unit does not emit excessive
microwave leakage and to meet the Department of
Health Human Service guidelines, check the oven
for microwave leakage using Narda Model 8100,
8200, Holaday HI1500, HI1501 or Simpson 380M
leakage monitor as outlined in the instructions. The
maximum leakage level allowed is 4mW/cm2.
13.If servicer encounters an emission reading over
4 mw/cm2 the servicer is to cease repair and contact
the Amana Service Department immediately for
further direction. Amana Appliances will contact the
proper Government Agency upon verification of the
test results.
RS5320013 Rev. 0 8
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Product Information
Antenna Blade
Distributes microwave energy throughout the cavity .
Blower/Fan Assembly
Circulates cooling air throughout the microwave oven
compartment and cavity.
Grease Shield
Covers and protects the antenna blade assembly.
Door Interlock and Monitoring Switch
NOTE: When the line fuse is open, Interlock Switch
Assembly must be replaced.
Interlock switch assembly mounts behind oven cavity
front bulkhead. Switches are actuated by the door
hooks.
Monitoring switch (contacts COM and NC) is actuated by
the bottom door hook.
The primary interlock switch (contacts COM and NO) is
actuated by the top door hook.
The secondary interlock switch (contacts COM and NO)
is actuated by the bottom door hook.
If a malfunction occurs in the primary interlock when door
opens, current will flow through the monitor switch
causing the oven fuse to open.
If a faulty door interlock switch has allowed current
through the monitor switch, the switch assembly must be
replaced (see interlock switch testing) before replacing
fuse.
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 earthed before handling.
High Voltage Capacitor
Doubles the A.C. output voltage from the high voltage
transformer.
High V oltage Diode (Rectifier)
Is connected at the output side of the high voltage
capacitor. It changes voltage from A.C. to D.C. It passes
current in one direction and blocks it in the other. Also
called a rectifier.
Magnetron
With filament voltage and high D.C. voltage from the
output of the H.V . capacitor/diode junction, the
magnetron will put out an electomagnetic radio frequency
of 2450 MHz to heat the food load in the oven.
Thermal Cutout Protectors
At a predetermined temperature, the thermal cut-outs will
open.
• Magnetron thermal cut-outs are mounted directly on
the body of the magnetron.
• Cavity thermal cut-out is mounted directly on the left
side of cavity exterior, inside the exhaust duct.
Touch Panels
Allows consumer operation and programming of oven.
Triac
Triac is controlled by control board. Triac controls one
side of the power line going to the high voltage power
transformer.
• Triac is mounted on blower bracket.
Antenna Motor(s)
Antenna motor(s) rotate(s) antenna assemblies.
Auto Transformer
Auto transformer in this unit provides a voltage of 120,
208, or 230 V AC.
Transformer High Voltage
High voltage transformer is used in this unit, which
supplies high voltage A.C. for operation of the magnetron
tube.
9 RS5320013 Rev. 0
Model Receptacle and Plug
HDC511
HDC514
HDC518
DEC11E
DEC14E
DEC18E
UC11E
UC14E
UC18E
UHDC511
UHDC514
UHDC518
CEE 7/7 Shuko
BS 1363A
Installation
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Unpacking Oven
• Remove packing and printed material from ovencavity .
• Inspect oven for damage such as dents
in door or inside oven cavity .
• Report any dents or breakage to source of
purchase immediately. Do not attempt to use oven if
damaged.
• If oven has been stored in extermely cold area, wait a
few hours before connecting power.
Oven Placement
• Do not install oven next to or above source of heat,
such as pizza oven or deep fat fryer. This could cause
microwave oven to operate improperly and could
shorten life of electrical parts.
• Do not block or obstruct oven filter. Allow access for
cleaning.
• Install oven on level countertop surface.
• 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.
Radio Interference
Microwave operation may cause interference to radio,
television, or similar equipment. Reduce or eliminate
interference by doing the following:
• Clean door and sealing surfaces of oven
according to instructions in "Care and Cleaning"
section.
• Place radio, television, etc. as far as possible from
oven.
• Use properly installed antenna on radio, television, etc.
to obtain stronger signal reception.
Earthing Instructions
NOTE: Do not under any circumstances cut or remove
earthing prong from the plug or bend power
prongs to fit receptacle other than one shown for
your equipment. Such abuse of the plug can
result in electrical shock or overheating.
WARNING
Improper use of earthing plug can result in a risk of
electrical shock or death.
A
A
A—Allow at least 7" (17.8 cm) of clearance around top
and sides of oven. Proper air flow around oven cools
electrical components. With restricted air flow, oven
may not operate properly and life of electrical parts
is reduced.
B
A
A
B
This equipment MUST be earthed. In the event of an
electrical short circuit, earthing reduces risk of electric
shock by providing an escape wire for electric current.
This oven is equipped with a cord having earthing wire
with a earthing plug. Plug must be plugged into an outlet
that is properly installed and earthed. DO NOT use a
two-prong adapter .
Consult a qualified electrician or servicer if earthing
instructions are not completely understood, or if doubt
exists as to whether the equipment is properly earthed.
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 50 Hz circuit with the appropriate
electrical rating as shown in the drawings. When an oven
is on a circuit with other equipment, an increase in
cooking times may be required and fuses can be blown.
External Equipotential Earthing T erminal
Equipment has secondary earthing terminal. T erminal
provides external earthing connection used in addition to
earthing prong on plug. Located on outside of oven back,
terminal is marked with symbol shown below.
B—Allow at least 2 9/16" (6.5 cm) between air discharge
on back of oven and back wall.
RS5320013 Rev. 0 10
Care and Cleaning
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Changing Oven Light Bulb
CAUTION
T o avoid electrical shock hazard unplug power cord or
open circuit breaker to microwave oven before replacing
light bulb. After replacing light bulb, reconnect power.
CAUTION
T o avoid burns and cuts, wear gloves to protect hands
should bulb break. If hot, allow bulb to cool.
T ools and Bulb
• Protective gloves
• Standard screwdriver or ¼ inch socket
• Light bulb rated 120 volt, 25 watt
1. Unplug oven.
2. Remove screw from side of oven and remove access
cover.
Cleaning Interior , Exterior, and Door
WARNING
T o avoid electrical shock which can cause severe
personal injury or death, unplug power cord or open
circuit breaker to oven before cleaning.
Clean microwave oven with mild detergent in warm water
using soft sponge or cloth. Wring sponge or cloth to
remove excess water before wiping equipment. If desired,
boil a cup of water in microwave oven to loosen soil
before cleaning.
• Do not use abrasive cleansers or cleaners containing
ammonia. These could damage finish.
• Never pour water into microwave oven bottom.
• Do not use water pressure type cleaning systems.
Cleaning Splatter Shield
Splatter shield keeps top of microwave oven cavity and
antenna from becoming soiled. Clean soil from shield
with damp cloth or clean with mild detergent and water .
Remove splatter shield for easy cleaning.
1. Unplug oven before removing splatter shield to stop
antenna from rotating.
2. Place fingers behind shield, pull forward, and down.
• When removing and replacing splatter shield, be
careful not to bend antenna.
3. Wash shield in hot, soapy water. Rinse and
dry thoroughly .
• Do not wash splatter shield in dishwasher.
• Do not use abrasive cleaners.
4. Reinstall splatter shield by placing front portion of the
shield in first. Lift until shield slides into holes
located in back of oven.
Correct Installation
3. Remove bulb by turning counterclockwise, being
careful not to burn fingers or break bulb.
• Replace with bulb rated 120 volt, 25 watt.
4. Reverse procedure to reassemble.
11 RS5320013 Rev. 0
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