Amana Menumaster LD10D2 SERVICE MANUAL

Service

This manual is to be used by qualified appliance technicians only. Maytag does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person.

This service manual replaces 16022123.

Countertop

This manual covers technical service information.

This manual includes, but is not limited to the following:

Commercial Microwave Ovens

LD10D2 P1329702M LD10MP P1329703M LD10MPS P1329708M

16023053

Revision 0

April 2004

Important Information

Important Notices for Servicers and Consumers

Maytag will not be responsible for personal injury or property damage from improper service procedures. 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 information. IT IS THE TECHNICIANS RESPONSIBLITY TO REVIEW ALL

APPROPRIATE SERVICE INFORMATION BEFORE BEGINNING REPAIRS.

! WARNING

To avoid risk of severe personal injury or death, disconnect power before working/servicing on appliance to avoid electrical shock.

To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact:

Commercial Support Center

CAIR Center

Web Site Telephone Number

WWW.AMANACOMMERCIAL.COM ....................... 1-866-426-2621

Recognize Safety Symbols, Words, and Labels

DANGER!

DANGER—Immediate hazards which WILL result in severe personal injury or death.

WARNING!

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, product or property

damage.

Table of Contents

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

Important Safety Information .......................................4-8

General Information

Unpacking Equipment ................................................ 9

Placement of the Oven ............................................... 9

Radio Interference ...................................................... 9

Model Identification .................................................... 9

Service ....................................................................... 9

Parts and Accessories..............................................10

Extended Service Plan ..............................................10

Microwave Oven Features ......................................... 10

Microwave Specifications .......................................... 10

Troubleshooting Procedures ................................... 11-15

Component Testing Procedures ................................... 16

Microwave Power Test Procedures

Power Test (Traditional 1 Liter Test) .......................... 18

Microwave Leakage Testing

Equipment ................................................................19

Procedure For Measuring Radiation Leakage ...........19

Measurement With the Outer Panel Removed .......... 19

Measurement With a Fully Assembled Oven ............19

Record Keeping and Notification After Measurement 19

Disassembly Procedures

Disconnecting Wire Terminals .................................. 20

Outer Case ............................................................... 20

Door Assembly ......................................................... 20

Door Disassembly .................................................... 21

Control Panel ............................................................21

Controller Removal (Electronic Models) .................... 22

Key Pad Removal ..................................................... 22

Timer Removal (Dial Models) .................................... 22

Interlock Switches .................................................... 23

High Voltage Capacitor ............................................. 23

Diode ........................................................................ 24

Transformer .............................................................. 24

Fuse Block / Filter Assembly ................................... 24

Fuse ......................................................................... 24

Magnetron ................................................................ 24

Fan Motor ................................................................. 24

Cavity Thermostat ..................................................... 25

Light Socket / Bulb Assembly ..................................25

Antenna .................................................................... 25

Stirrer Motor.............................................................. 25

Wiring Diagrams And Schematics ............................... 26

Appendix A

Operation—LD10 .................................................... A-2

Cooking Guidelines ................................................. A-7

Care and Cleaning .................................................. A-9

Before Calling for Service ...................................... A-10

Appendix B

Operation—LD10D .................................................. B-2

Cooking Guidelines ................................................. B-3

Care and Cleaning .................................................. B-5

Before Calling for Service ........................................ B-6

Important Safety Information

WARNING

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 the Radarange to maintain this safety. These are as follows:

1. Always operate the unit from an adequately grounded 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 Maytag Amana Manufacturing

immediately.

5. Always have the oven disconnected when the outer case is removed except when making the "live" tests called for in the 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 ground the capacitors on the magnetron filter box 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.

8. Do not for any reason defeat the interlock switches there is not valid reason for this action at any time; nor will it be condoned by Amana.

9. IMPORTANT: Before returning a unit to a customer, be sure to check for proper switch interlock action.

10. The Amana Microwave Oven should never be operated with any components removed and/or bypassed or when any of the safety interlocks are found to be defective, or when any of the seal surfaces are defective, missing, or damaged.

11. All Amana microwave ovens meet all requirements of the radiation control for Health and Safety Act of

1968. Due to measurement uncertainties, the maximum leakage for the field will be 4mw/cm

12. To ensure that the unit does not emit excessive microwave leakage and to meet the Department of Health and Human Services guidelines, check the oven for microwave leakage using the models Narda 8110B, Holaday HI-1501, HI-1510, or HI-1710 leakage monitor as outlined in the instruction. The maximum leakage level allowed when following those instructions is 4mw/cm2.

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

7. Always remember that in the area of the transformer there is HIGH VOLTAGE. When the unit is operating keep this area clear and free of anything which could possibly cause an arc or ground, etc.

Important Safety Information

Recognize this symbol as a SAFETY message

WARNING

When using electrical equipment, basic safety precautions should be followed to reduce the risk of burns, electrical shock, fire, or injury to persons.

1. READ all instructions before using equipment.

2. READ AND FOLLOW the specific

“PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY”.

3. This equipment MUST BE GROUNDED. Connect only to properly GROUNDED outlet. See “GROUNDING INSTRUCTIONS”.

4. Install or locate this equipment ONLY in accordance with the installation instructions in this manual.

5. Some products such as whole eggs and sealed containers, for example, closed glass jars may explode and SHOULD NOT be HEATED in this oven.

6. Use this equipment ONLY for its intended use as described in this manual. Do not use corrosive chemicals or vapors in this equipment. This type of oven is specifically designed to heat or cook. It is not designed for industrial or laboratory use.

7. As with any equipment, CLOSE SUPERVISION is necessary when used by CHILDREN.

8. DO NOT operate this equipment if it has a damaged cord or plug, if it is not working properly, or if it has been damaged or dropped.

9. This equipment, including power cord, must be serviced ONLY by qualified service personnel. Special tools are required to service equipment. Contact nearest authorized service facility for examination, repair, or adjustment.

10. DO NOT cover or block filter or other openings on equipment.

11. DO NOT store this equipment outdoors. DO NOT use this product near water, for example, near a kitchen sink, in a wet basement, or near a swimming pool, and the like.

12. DO NOT immerse cord or plug in water.

13. Keep cord AWAY from HEATED surfaces.

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

15. See door cleaning instructions in “Care and Cleaning” section.

16. For commercial use only.

CAUTION

To reduce risk of fire in the oven cavity:

a. DO NOT overcook food. Carefully attend

equipment if paper, plastic, or other combustible materials are placed inside the oven to facilitate cooking.

b. Remove wire twist-ties from paper or plastic

bags before placing bag in oven.

c. KEEP oven DOOR CLOSED, turn oven off, and

disconnect the power cord, or shut off power at the fuse or circuit breaker panel, if materials inside the oven should ignite. Fire may spread if door is opened.

d. DO NOT use the cavity for storage. DO NOT

leave paper products, cooking utensils, or food in oven.

SAVE THESE INSTRUCTIONS

Important Safety Information

CAUTION

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

1. Briskly stir or pour liquids before heating with microwave energy to prevent spontaneous boiling or eruption. Do not overheat. If air is not mixed into a liquid, liquid can erupt in oven or after removal from oven.

2. Do not deep fat fry in oven. Fat could overheat and be hazardous to handle.

3. Do not cook or reheat eggs in shell or with an unbroken yolk using microwave energy. Pressure may build up and erupt. Pierce yolk with fork or knife before cooking.

4. Pierce skin of potatoes, tomatoes, and similar foods before cooking with microwave energy. When skin is pierced, steam escapes evenly.

5. Do not operate equipment without load or food in oven cavity.

6. Use only popcorn in packages designed and labeled for microwave use. Popping time varies depending on oven wattage. Do not continue to heat after popping has stopped. Popcorn will scorch or burn. Do not leave oven unattended.

7. Do not use regular cooking thermometers in oven. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to oven.

8. Do not heat baby bottles in oven.

9. Do not use metal utensils in oven.

10. Never use paper, plastic, or other combustible materials that are not intended for cooking.

11. When cooking with paper, plastic, or other combustible materials, follow manufacturer's recommendations on product use.

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

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

14. To avoid pacemaker malfunction, consult physician or pacemaker manufacturer about effects of microwave energy on pacemaker.

PRECAUTIONS TO AVOID POSSIBLE EXPOSURE

TO EXCESSIVE MICROWAVE ENERGY

a. DO NOT attempt to operate this oven with the

door open since open-door operation can result in harmful exposure to microwave energy. It is important not to defeat or tamper with the safety interlocks.

b. DO NOT place any object between the oven front

face and the door or allow soil or cleaner residue to accumulate on sealing surfaces.

c. DO NOT operate the oven if it is damaged. It

is particularly important that the oven door close properly and that there is no damage to the: (1) door (bent), (2) hinges and latches (broken or loosened), (3) door seals and sealing surfaces.

d. The oven should NOT be adjusted or repaired

by anyone except properly qualified service personnel.

SAVE THESE INSTRUCTIONS

Important Safety 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.

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

• Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary:

• Interlock operation

• Proper door closing

• Seal and sealing surfaces (arcing, wear, and other damage)

• Damage to or loosening of hinges and latches

• Evidence of dropping or abuse

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

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

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

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.

WARNING

To avoid the risk of electrical shock or death, do not alter the plug.

WARNING

To avoid the risk of electrical shock or death, this equipment must be grounded.

This equipment MUST be grounded. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This oven is equipped with a cord having a grounding wire with a grounding plug. The plug must be plugged into an outlet that is properly installed and grounded.

Consult a qualified electrician or servicer if grounding instructions are not completely understood, or if doubt exists as to whether the equipment is properly grounded.

Do not use an extension cord. If the product power cord is too short, have a qualified electrician install a threeslot receptacle. This oven should be plugged into a separate 60 hertz circuit with the electrical rating as shown in the appropriate drawing. Models operate with a 120 supply voltage. When a microwave oven is on a circuit with other equipment, an increase in cooking times may be required and fuses can be blown.

NEMA 5-20R/5-20P

120V–20AMP

NEMA 5-15R/5-15P

120V–15AMP

Important Safety Information

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

A good service practice is never route wiring over terminals and/ or sharp edges. This applies to any wiring without regard to the circuit voltage. Wire installation 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.

WARNING

To avoid risk of electrical shock, personal injury or death; verify the oven is properly grounded and polarized.

Proper Grounding and Polarization of 120 Volts Wall Outlets

For the safety of our customers and the service technician ALL appliances have a three–prong power cord and MUST be connected to a properly polarized and grounded wall outlet.

This information was written for those who do not understand grounding and polarization of a wall outlet.

A 120 volt wall outlet must always be wired as shown below.

Explanation

Polarization–This means that the larger slot must be

neutral and the small slot must be hot (live). Mispolarized–The outlet is miswired so that the larger slot is hot (live) and the smaller slot is neutral. Grounded–This means the round hole connection is connected to earth ground through a connection to the main power panel. Ungrounded–The round hole connection is not complete to earth ground and/or the main power panel.

Test Procedures (2 Methods)

Method #1

Purchase and use a ground monitor which indicates a correctly or incorrectly wired outlet by instructions imprinted on the monitor body.

Method #2

Voltmeter - (Use scale over 125 Volts A.C.)

• Test A - "H" to "N" must indicate line voltage.

• Test B - "H" to "G" must indicate line voltage.

• Test C - "N" to "G" must indicate zero (0) volts.

If "N" to "G" indicates line voltage the outlet is improperly polarized.

If "H" to "G" indicates zero (0) volts the outlet is not grounded.

Neutral (N) - This slot is the larger of the two and should be neutral (dead) with respect to ground.

Ground (G) - The round hole connection is for the grounding circuit. Behind the cover plate a green wire should be conne cted to this terminal.

Hot (H) - This slot is the smaller size and should always be hot (live) with respect to neutral (N) and groun d(G).

CAUTION

To avoid risk of electrical shock, personal injury or property damage; wiring changes or grounding of wall outlet are to be made only by a qualified electrician.

General Test Information

Most testing in the manual is conducted with an ohmmeter using a multiplier scale of X 10k (k–thousand ohms). When using this scale, it is important that your fingers do not touch the metal parts of the test probes. To do so will give a false indication of the ohm reading.

General Information

Unpacking Equipment

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

• Report any dents or breakage to source of purchase immediately. Do not attempt to use oven if damaged.

• Remove all materials from oven interior.

Placement of the Oven

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

• Install microwave on a level countertop surface.

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

• All air vents must be kept clear during cooking. If air vents are covered during operation the oven may overheat. In this case, a sensitive thermal safety device automatically turns the oven off. The oven will be inoperable until the oven has cooled sufficiently.

Radio Interference

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

• Clean the door and sealing surfaces of microwave oven according to instructions in “Care and Cleaning” section.

• Place radio, television, ect. as far as possible from the microwave oven.

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

Model Identification

Complete registration card and promptly return. If registration card is missing:

• For Amana product call 1-866-426-2621 or visit the Web Site at www.amanacommercial.com

• For product in Canada call 1-866-426-2621 or visit the Web Sites at www.amanacommercial.com

When contacting provide product information located on rating plate. Record the following:

Model Number: ___________________ Manufacturing Number: ___________________ Serial or S/N Number: ___________________ Date of purchase: ___________________ Dealer’s name and address: ___________________

A–Allow at least 1-1/2 inches (3.81 cm) of clearance

around top and sides of unit.

B–Allow at least 3 inches (7.62 cm) from door front

to edge of countertop, to avoid accidental tipping of the unit.

Side of

Control Panel

Service

Keep a copy of sales receipt for future reference or in case warranty service is required. To locate an authorized servicer:

• For Amana product call 1-866-426-2621 or visit the Web Site at www.amanacommercial.com

• For product in Canada call 1-866-426-2621 or visit the Web Sites at www.amanacommercial.com

Warranty service must be performed by an authorized servicer. We also recommend contacting an authorized servicer, if service is required after warranty expires.

General Information

Microwave Oven Features

A—Window door screen B—Spatter shields C—Control panel (Electric or Dial) D—Door open button E—Safety door lock system

MicrowaveSpecifications

Power Source

Voltage AC 120 VAC Amperage (Single Unit) 15 A Frequency 60 Hz

Single phase, 3−wire ground Receptacle

Plug Power cord 5 ft. (1.5 m) Power Output Normal microwave energy (IEC705) 1000 Watts Operating Frequency 2450 MHz Power Consumption Cook condition microwave 1450 Watts

Cabinet

Width 20 9/16 in (53.0 cm) Height 12 3/8 in (31.5 cm) Depth 15 1/2 in (39.4 cm)

Oven Interior

Width 13 7/8 in (34.4 cm) Height 9 5/32 in (23.3 cm) Depth 14 3/8 in (36.5 cm) Capacity 1.0 cu.ft. (28.3 l)

Weight

Crated 40 lbs (18 kg)

Models LD10D2

LD10MP

LD10MPS

Yes 5−15 R 5−15 P

Troubleshooting Procedures

When you get a complaint from customers, evaluate the complaint carefully. If the following symptoms apply, instruct the customer in the proper use of the microwave oven. This can eliminate an unnecessary service call.

CAUTION

• Verify proper grounding before checking for trouble.

• Be careful of the high voltage circuit.

• Discharge the high voltage capacitor.

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

• Do not touch any part of the circuit on the controller, since static electric discharge may damage the control panel. Always touch yourself to ground while working on this panel to discharge any static charge built up in your body.

Condition Cause Remedy

Microwave oven does not work.

Output power is too low.

Sparks occur.

Uneven cooking. Inconsistent food thickness,

• Inserting m ultiple plugs into one outlet and using them at the sam e time (blown fuse or breaker).

• Microwave oven plug is not inserted tightly.

• Low AC input voltage. • Use the microwave oven at

• Food temperature is too low. • This may not be a defect. It is

• Using metallic ware and

allowing it to touch the oven wall.

• Ceramic ware trimmed in gold or silver is used.

inconsistent fat or moisture distribution within the food products.

• Avoid using other electrical appliances when you use the microwave oven.

• Insert microwave oven plug securely.

adequate line voltage.

possible that the food should be cooked for a longer time period.

• Do not use metallic ware for cooking.

• Do not use any type of cookware with metallic trimming.

• Use plastic wrap or lid.

•

Stir once or twice while

cooking soup, cocoa, milk, etc.

Troubleshooting Procedures (Electronic Models)

Trouble 1: The following visual conditions indicate a probable failed control circuit.

1. Incomplete segments.

• Segment missing.

• Partial segment missing.

• Digit flickering (Note: Slight flickering is normal.)

2. Colon does not turn on or blink.

3. A distinct change in the brightness of one or more numbers in display.

4. One or more digits in the display are not lighting.

5. Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display.

6. Specific numbers (for example 7 or 9) will not display when key pad is touched.

7. Display does not count down with time blinking or count up during operation.

8. Display obviously jumps in time while counting down.

9. Display counts down too fast while cooking.

10.Each indicator light does not turn on after setting cooking cycle.

11. Display time of day does not reappear when cooking is finshed.

Condition Check Result Cause Remedy

No input can be programmed.

1. Some inputs cannot be programmed.

Check the connection between keypad and controller.

Replace keypad and check operation.

• Continuity • Failed controller.

• No continuity • Loose connection.

• Everything

works as specified.

• Failed keypad.

• Replace controller.

• Repair connection.

• Replace keypad.

2. Display shows a number or figure different from one touched.

3. Random programming when touching other pads.

4. Display is fixed at some figure and can not accept any input.

• Still have trouble.

• Failed controller.

• Replace controller.

Troubleshooting Procedures (Dial and Electronic Models)

Oven does not operate at all, display window does not display any digits and no input is accepted.

Fuse blows.

Check continuity

of monitor switch

with door closed.

Check continuity

of primary switch

with door opened.

Check continuity

of secondary

switch with door

opened.

Continuity

Malfunction

of the

monitor

switch.

Malfunction of primary switch.

Malfunction of

secondary

switch.

Replace the fuse,

primary,

secondary, monitor

switches and

controller.

Replace the fuse,

primary,

secondary, monitor

switches and

controller.

Replace the fuse,

primary,

secondary, monitor

switches and

controller.

Disconnect one side of

the wire lead connecting

transformer to high

voltage capacitor and

operate the unit.

NOTE: If replacing a switch, all switches must be replaced at the same time.

Fuse does not

blow.

Check continuity

of thermostat

(cavity and

magnetron).

Check continuity

of power cord.

Normal

Fuse blows

again.

Continuity

Failed high

voltage

capacitor.

Failed high

voltage

transformer.

Failed

thermostat.

Failed power

cord.

Replace high

voltage

capacitor.

Replace high

voltage

transformer.

Replace

thermostat.

Replace

power cord.

Troubleshooting Procedures (Electronic Models)

Display shows all digits programmed, but does not start cooking when the START pad is pressed.

Time does not

count down after

START pad is

pressed.

Oven light or fan

motor does not

operate.

Check continuity of

secondaryswitch with door closed.

Check connection

between CN1

connector and

c.ontroller.

Normal

Check oven light.

Check fan motor.

Continuity

Abnormal

Malfunction of

secondary

switch.

Failed

controller.

Loose

connection.

Failed oven

light.

Failed fan

motor.

Replace the

secondary

switch.

Replace

controller.

Repair

connection.

Replace oven

light.

Replace fan

motor.

Dial and Electronic Models Oven operates with little or no heat.

Output

performance

is low.

Check the power

supply voltage.

Disconnect wire leads

from relay RY2 and

verify on and off times.

Measure the

output power.

Lower than

90% of rated

voltage.

Normal

Abnormal

Normal

Abnormal

Decrease in

supply voltage

under load.

Failed

controller.

Failed

magnetron

Customer must

contact local

power

company or

qualified

electrician.

Replace

controller.

Replace

magnetron.

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