Amana Commercial Microwave Service Training Manual

Table of Contents

• Important Safety Information
• Installation
• Specifications
• Quick Start Reference Guide (Electronic Mechanical Dial)
• Quick Start Reference Guide (Electronic Control)
• Components Location (Oven Cavity)
• Components Location (Blower / Interlock)
• Components Location (Dial Control)
• Components Location (Electronic Control)
• Components Location (Door)
• Performance Testing Procedures
• Component Testing Procedures
• Troubleshooting
• Schematic / Wiring Diagrams

Important Safety Information

Important Notices for Servicers and Consumers

ACP will not be responsible for personal injury or property damage from improper service procedures. Pride and workmanship go into every product to provide 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 technician's responsibility 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 contact:

ComServ Support Center

Web Site: WWW.ACPSOLUTIONS.COM

E-Mail: commercialservice@acpsolutions.com

Telephone Number: 1-866-426-2621 or 319-368-8195

Recognize Safety Symbols, Words, and Labels

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

! WARNING: Hazards or unsafe practices which COULD result in severe personal injury or death.

► CAUTION: Hazards or unsafe practices which COULD result in minor personal injury, product or property damage.

Important Safety Instructions

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

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

1. Read all instructions before using equipment.
2. Read and follow the specific "Precautions to Avoid Possible Exposure to Excessive Microwave Energy" on this page.
3. This equipment MUST BE GROUNDED. Connect only to properly GROUNDED outlet. See “Grounding / Earthing Instructions" on page 5.
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—are able to 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, cook, or dry food. It is not designed for industrial or laboratory use.
7. As with any equipment, CLOSE SUPERVISION is necessary when used by CHILDREN.
8. See door cleaning instructions on page A-4 of this owners manual.
9. DO NOT heat baby bottles in oven.
10. Baby food jars shall be open when heated and contents stirred or shaken before consumption, in order to avoid burns.
11. 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.
12. 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.
13. DO NOT cover or block louvers or other openings on equipment.
14. DO NOT store this equipment outdoors. DO NOT use this product near water – for example, near a kitchen sink, in a wet basement, a swimming pool, or a similar location.
15. DO NOT immerse cord or plug in water.
16. Keep cord AWAY from HEATED surfaces.
17. DO NOT let cord hang over edge of table or counter.
18. For commercial use only.

PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

• 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.
• DO NOT place any object between the oven front face and the door too allow soil or cleaner residue to accumulate on sealing surfaces.
• 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:
  • door (bent)
  • hinges and latches (broken or loosened)
  • door seals and sealing surfaces.
• The oven should not be adjusted or repaired by anyone except properly qualified service personnel.

SAVE THESE INSTRUCTIONS

WARNING To avoid risk of fire in the oven cavity:

• DO NOT overcook food. Carefully attend oven when paper, plastic, or other combustible materials are placed inside the oven to facilitate cooking.
• Remove wire twist-ties from paper or plastic bags before placing bag in oven.
• If materials inside the oven ignite, keep oven door CLOSED, turn oven off and disconnect the power cord, or shut off power at the fuse or circuit breaker panel.
• DO NOT use the cavity for storage. DO NOT leave paper products, cooking utensils, or food in the cavity when not in use.

WARNING Liquids such as water, coffee, or tea are able to be overheated beyond the boiling point without appearing to be boiling due to surface tension of the liquid. Visible bubbling or boiling when the container is removed from the microwave oven is not always present. THIS COULD RESULT IN VERY HOT LIQUIDS SUDDENLY BOILING OVER WHEN A SPOON OR OTHER UTENSIL IS INSERTED INTO THE LIQUID. To reduce the risk of injury to persons:

• Do not overheat the liquid.
• Stir the liquid both before and halfway through heating it.
• Do not use straight-sided containers with narrow necks.
• After heating, allow the container to stand in the microwave oven for a short time before removing the container.
• Use extreme care when inserting a spoon or other utensil into the container.

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

1. Do not deep fat fry in oven. Fat could overheat and be hazardous to handle.
2. 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.
3. Pierce skin of potatoes, tomatoes, and similar foods before cooking with microwave energy. When skin is pierced, steam escapes evenly.
4. Do not operate equipment without load or food in oven cavity.
5. Microwave popcorn should not be popped in oven.
6. Do not use regular cooking thermometers in oven. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to oven.
7. Do not use metal utensils in oven.
8. Do not use aluminum foil in oven.
9. Never use paper, plastic, or other combustible materials that are not intended for cooking.
10. When cooking with paper, plastic, or other combustible materials, follow manufacturer's recommendations on product use.
11. Do not use paper towels which contain nylon or other synthetic fibers. Heated synthetics could melt and cause paper to ignite.
12. 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.
13. To avoid pacemaker malfunction, consult physician or pacemaker manufacturer about effects of microwave energy on pacemaker.
14. An authorized servicer MUST inspect equipment annually. Record all inspections and repairs for future use.

SAVE THESE INSTRUCTIONS

Installation

Unpacking Oven

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

Radio Interference

Microwave operation may cause interference to radio, television, or similar a oven. 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 a properly installed antenna on radio, television, etc. to obtain stronger signal reception.

WARNING Excessive Weight Hazard: Use two or more people to move and install oven. Failure to do so can result in back or other injury.

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.

Oven Clearances

A—For North American (UL/CSA) models, allow at least 2" (5.1 cm) of clearance around top of oven. For International (50 Hz) models, allow at least 12" (30 cm) of clearance around top 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—Allow at least 2" (5.1 cm) between air discharge on back of oven and back wall.

C—Allow at least 2" (5.1 cm) of clearance around sides of oven.

Specifications

Quick Start Reference Guide (Electronic / Mechanical Dial)

Menu Guide

• 2:00
• 1:00-2:00
• 1:30-2:30
• :15
• :45
• :30

Heating

1. Open oven door, place food in oven, and close oven door.
2. Select desired power level or use default 100%.
3. Turn time entry knob clockwise to desired time. Cooking time can be set up to 10 minutes.
4. Oven begins operation and time counts down.
5. When cooking time has elapsed, microwave energy stops and oven signal sounds.

Interrupting Operation

Open oven door to interrupt operation or turn time entry knob counterclockwise to "0". To resume microwave oven operation, close door, select power level pad, and turn knob.

Changing Time and Canceling Mistakes

Heating time and power level can be changed at any time while the oven is operating. Press power level pad or turn knob to desired new setting. To set cooking time to zero, turn knob counterclockwise to "0" or cycle door open and closed.

Changing Timer Option

Timer pausing current cook time and power level can be set at any time to reset to zero and 100% power level when door is opened. To change this option follow the step below:

• With door open press and hold the 100% pad for 5 seconds until beep is heard. Close the door this changes timer setting to pause current cook time and power level when door is opened.
• Timer pausing current cook time and power level can be set at any time to reset to zero and 100% power level when door is opened. To change this option follow the step below:
• With door open press and hold the 20% pad for 5 seconds until beep is heard. Close the door this changes timer setting to reset timer to zero and power level to 100% when door is opened.

Oven Wall Clearances

A—For North American (UL/CSA) models, allow at least 2" (5.1 cm) of clearance around top of oven. For International (50 Hz) models, allow at least 12" (30 cm) of clearance around top 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—Allow at least 2" (5.1 cm) between air discharge on back of oven and back wall.

C—Allow at least 2" (5.1 cm) of clearance around sides of oven.

DO NOT power spray

No metal pans

Quick Start Reference Guide (Electronic Control)

Preprogrammed Pads

To cook food using preprogrammed cooking sequences:

1. Open oven door and place food in oven. Close door.
2. Press desired pad.
3. Oven begins to cook.
4. At end of cooking cycle oven beeps and shuts off.

X2 Programming

To change the cooking factor:

1. Open oven door.
2. Press and hold pad 1 for approximately 5 seconds.
3. Press pad to be reprogrammed.
4. Press the X2 pad.
5. Press a numbered pad to change the cooking factor. Cooking factor can be set from 10% to 100%. Default is 80%. Pad 5 would change the cooking factor to 50%.
6. Press START pad to save changes.

Manual Operation

To cook food using a specific entered time and power level:

1. Open oven door and place food in oven. Close door.
2. Press TIME ENTRY pad and enter cooking time.
3. Press a power level pad to change power level if desired (some models). COOK LEVEL displays with the power setting.
4. If stage cooking is desired, press TIME ENTRY pad and repeat steps 2 through 4.
5. Press START pad.
6. At end of cooking cycle oven beeps and shuts off.

Programming Items

1. Open oven door.
2. Press and hold pad 1 for approximately 5 seconds.
3. Press pad to be reprogrammed.
4. Enter cooking time by using the number pads.
5. Press a power level pad to change power level if desired.
6. If stage cooking is desired, press TIME ENTRY pad. Display briefly shows the stage number.
7. Enter cook time and power level as in steps 4 and 5 (some models). To enter another cooking stage for that pad, press TIME ENTRY pad again. Up to four different stages can be programmed (some models).
8. Press START pad to set new programming changes to the pad.

NOTE: To discard changes, press STOP/RESET pad or close oven door.

X2 Pad

1. Open oven door and place food in oven. Close door.
2. Press X2 pad.
3. Press desired preprogrammed pad or pad sequence.
4. Oven begins cooking. Displayed cooking time is the total of original cooking time and added X2 time.

Oven Wall Clearances

A—For North American (UL/CSA) models, allow at least 2" (5.1 cm) of clearance around top of oven. For International (50 Hz) models, allow at least 12" (30 cm) of clearance around top 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—Allow at least 2" (5.1 cm) between air discharge on back of oven and back wall.

C—Allow at least 2" (5.1 cm) of clearance around sides of oven.

DO NOT power spray

No metal pans

Can I change an option?

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

To change options:

1. Open oven door.
2. If door is closed or STOP/RESET pad is pressed before programming is complete, changes are discarded and microwave exits programming mode.
3. Press and hold pad 2 for approximately 5 seconds. This begins options mode. Microwave will beep and OP: displays.
4. Press number pad that controls option to be changed. See table below for options. Current option will display.
5. Press number pad again to change the option. Each time pad is pressed, option will change. Match code displayed with code for desired option.
6. Press START pad to save changes. To change additional options, repeat steps 3 and 4. Changes appear after door is closed or STOP/RESET pad is pressed.

Components Location (Oven Cavity)

A diagram showing the components within the oven cavity. A table lists the reference number, part number, description, and quantity for each component.

Components Location (Blower / Interlock)

A diagram showing the blower and interlock components. A table lists the reference number, part number, description, and quantity for each component.

Components Location (Dial Control)

A diagram showing the components of the dial control. A table lists the reference number, part number, description, and quantity for each component.

Components Location (Electronic Control)

A diagram showing the components of the electronic control. A table lists the reference number, part number, description, and quantity for each component.

Components Location (Door)

A diagram showing the components of the door assembly. A table lists the reference number, part number, description, and quantity for each component.

Performance 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.

All Amana and Menumaster microwave oven power outputs are rated using the IEC705 standards. Using the IEC705 test method requires precision measurements and equipment that is not practical to be performed in the field. Using the test shown below will indicate if the oven performance is satisfactory.

Test equipment required:

• 1000 ml test container and thermometer.
• Digital watch / watch with a second hand for use on ovens with electromechanical timers.

Important Notes:

• Low line voltage will cause low temperature rise / power output.
• Ovens must be on a dedicated circuit, properly grounded, and polarized. Other equipment on the same circuit may cause a low temperature rise / power output.
• This test and results are not a true IEC705 test procedures and are only intended to provide servicers with an easy means of determining if the microwave oven cooking output is correct.

Procedure

1. Fill the test container to the 1000 ml line with cool tap water.
2. NOTE: Water temperature should be approximately 60°F / 16°C
3. Using the thermometer, stir water for five to ten seconds; measure, and record the temperature (T1).
4. Place test container of water in the center of oven cavity and close door.
5. Heat the water for a 33-second full power cycle.
6. NOTE: Use a digital watch or a watch with a second hand for ovens with electromechanical timers.
7. At end of the cycle, remove test container. Using the thermometer, stir water for five to ten seconds and record temperature (T2).
8. Subtract the starting water temperature (T1), from the ending water temperature (T2) to obtain the temperature rise (ΔT).
9. If the temperature rise (ΔT) meets or exceeds the minimum, the test is complete. If the temperature rise (ΔT) fails to meet the minimum temperature rise, test the line voltage to verify it is correct. Then repeat steps 1 - 6 making sure to change the water. If the temperature rise (ΔT) fails to meet the minimum temperature rise again the oven will require service.

Minimum Temperature Rise at Thirty -Three (33) Seconds Run Time

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 power.

WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor before servicing, unless testing requires power.

Troubleshooting

Service Diagnostics

Control does not power up

• Check for line voltage between the white and black wire on the inlet side of the filter board.
• If yes, check for line voltage between the blue/white and black wires on the outlet side of the filter board.
• If yes, check oven TCO to ensure it has continuity.
• If yes, check Magnetron TCO for continuity.
• If yes, check for line voltage at CN1 pin 1 (Brown) & pin 3 (Blue).
• If yes, control is defective and needs to be replaced.
• If no to line voltage checks, check fuse on filter board and replace as needed.
• If oven TCO has no continuity, replace Oven TCO.
• If Magnetron TCO has no continuity, replace Magnetron TCO.
• If no line voltage at CN1, check for continuity of wires or a bad wire connector.
• If oven is not plugged in, plug oven in.

Service Diagnostics

Control powers up, but no heat

• When the oven is plugged in is there showing in the display? If no, see service diagnostics - no power.
• If yes, open door, does oven light and fan come on? If no, check door switch assembly, adjust or replace as needed.
• If yes, close door and control should say ready? If no, check door switch assembly, adjust or replace as needed.
• If yes, push time key, enter: 10 seconds.
• If yes, push the green start button, does timer count down? If no, check key pad ribbon connector to ensure it is connected. If still no, key pad assembly needs to be replaced.
• If yes, check for line voltage across the blue and black leads on the primary side of the HV transformer. If no, check wire continuity and terminals. If still no, the HV/LV relay board needs to be replaced.
• If yes, with power disconnected, check for < 1 ohms resistance across the primary coil. If no, HV transformer needs to be replaced.
• If yes, with power disconnected check for approximately 90 ohms from the secondary wire to ground screw. If no, HV transformer needs to be replaced.
• If yes, check capacitor, with meter set on the highest ohm scale, meter should read zero, then return to over 50m ohms. If no, replace capacitor.
• If yes, test diode, with meter set on ohms scale, should be infinite, switch leads and should read 50k ohms in one direction. If no, replace diode, ensure a good tight ground.

Schematic / Wiring Diagram RCS10* / MCS10*

A schematic diagram illustrating the wiring of the Amana RCS/MCS microwave ovens. It details the connections between components such as the high voltage transformer, magnetron, PCB, and various switches and motors. Wire colors are indicated for reference.

NOTE:

1. DOOR IS OPENED
2. WIRE COLOR

SYMBOL COLOR

BEFORE SERVICING

Discharge the high voltage capacitor by shorting the negative high voltage terminal of it to chassis ground.

Notes

Additional notes or comments not categorized elsewhere.