MENUMASTER COMMERCIAL MICROWAVE R OVEN 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.
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.
Table of Contents Important Information .................................................... 2 Important Safety Information ......................................... 4 Grounding Instructions ............................................... 7 Wiring ........................................................................ 8 Earthing Instructions .................................................. 8 Servicing of Earthed Products .................................... 8 General Information Unpacking Equipment .....
Important Safety Information 4 16026969 ©2006 Maytag Services
Important Safety Information ©2006 Maytag Services 16026969 5
Important Safety Information 6 16026969 ©2006 Maytag Services
Important Safety Information ! CAUTION Read the following information to avoid possible exposure to microwave radiation: The basic design of the Amana and 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.
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. WARNING To avoid risk of electrical shock, personal injury or death, make sure these earthing instructions are followed. (A) Do not operate or allow oven to be operated with door open.
General Information Unpacking Equipment Oven Features • 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. Removable Splatter Shield (Not Shown) Equipment Placement • Do not install equipment next to or above source of heat, such as pizza oven or deep fat fryer.
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.
Troubleshooting Procedures (Electronic Models) Trouble 1: Oven does not operate at all, no inputs can be accepted.
Troubleshooting Procedures (Electronic Models) Trouble 2: Display shows all figures selected, but does not start cooking even though desired program and time is set when the START pad is pressed.
Troubleshooting Procedures (Electronic Models) Trouble 3: No microwave when fan motor operates.
Troubleshooting Procedures (Electronic Models) Trouble 4: The following visual conditions indicate a probable failed control circuit or membrane switch assembly. 1. Incomplete segments. • Segment missing. • Partial segment missing. • Digit flickering (Note: Slight flickering is normal.) • “ :0” does not display when power is on. 2. A distinct change in the display is not on, when it should be. 3. One or more digits in the display are not on, when it should be. 4.
Troubleshooting Procedures (Dial Models) 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 grouding before checking for trouble. Be careful of the high voltage circuit. Discharge the high voltage capacitor.
Troubleshooting Procedures (Dial Models) Does the fan motor work when you shut the door and turn the timer? YES Does the oven lamp light? NO Replace or repair oven lamp. YES Normal reading should be approx. 0 If microwave does not oscillate, check continuity of filament of magnetron. NO Continuity Check continuity filament tap (3.3V) of high voltage. No Continuity Replace high Voltage transformer Continuity Poor continuity Check continuity filament tap (3.3V) of high voltage.
Service Information ! WARNING To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor before servicing, unless testing requires power. Proper Handling of Magnetron Tubes ! CAUTION A magnetron tube, like a radio or television tube must be handled with a reasonable amount of care. When handling a tube, always handle by the housing only. Use caution not to touch or strike the ceramic portion at the top.
Microwave Leakage Testing ! WARNING To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor before servicing, unless testing requires power. ! Measurement with the Outer Panel Removed WARNING Check for radiation leakage after servicing. Should the leakage be more than 4 mW/cm2 inform Maytag immediately. After repairing or replacing any radiation safety device, keep a written record for future reference, as required by D.H.H.S.
Troubleshooting ! WARNING To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor before servicing, unless testing requires power. Operating Instructions for the Holaday HI1501, HI1510, and HI1710 Purpose of these monitors is to check radiation leakage around microwave oven door or other places where radiation could possibly occur. Instrument measures radiation leakage in milliwatts per square centimeters (mW/cm2).
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. Illustration Component Thermal cutout Testing Disconnect all wires from TCO. Measure resistance across terminals. Cavity TCO............................................ Magnetron TCO..................................... Diode Discharge Capacitor Remove diode lead from capacitor and connect ohmmeter.
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. Illustration Component Results Test continuity of terminals. Slow acting relay assembly Disconnect black wire from relay and measure voltage from neutral (blue wire on Filter Assembly) to relay terminal with black wire removed. Power Out terminals .......................................
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. 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.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle. It is neither necessary or advisable to attempt measurement of the high voltage. Before touching any oven components or wiring, always unplug the oven from its power source and discharge capacitor.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING 5. Remove screws securing choke assembly to outer door panel. Door Assembly ! CAUTION A microwave leakage test must be performed anytime a door assembly is removed, replaced, disassembled, or adjusted for any reason. Door Removal 1. Disconnect power to oven. 2.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING Control Panel (Electronic) 1. 2. 3. 4. 5. 6. Disconnect power to oven. Remove outer case, see "Outer Case" procedure. Disconnect and label wires from control board. Open oven door. Remove screw securing ground strap. Remove screw securing control panel to cavity. Lift control panel up and out to release tabs.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING Adjusting Interlocks The interlock monitor, primary, and secondary switches act as a final safety switch, protecting the operator from microwave energy. After adjusting the interlock switch assembly, verify wires are correctly connected. For door fit and switch operation, switch bracket is adjustable. 1.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING High Voltage Fuse Blower Assembly 1. Disconnect power to oven and remove outer case, (see "Outer Case" procedure). 2. Discharge high voltage capacitor, (see "High Voltage Capacitor" section). 3. Disconnect high voltage fuse wire terminals from transformer and capacitor. 4.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING Magnetron Splatter Shield / Antenna Magnetron is located on the side of the cavity. NOTE: Be careful not to bend antenna when removing splatter shield. 1. Disconnect power to oven and remove outer case, (see "Outer Case" section). 2. Discharge high voltage capacitor, (see "High Voltage Capacitor" section).
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. WARNING Stirrer Motor Oven Light Assembly 1. 2. 3. 4. The light bulb for inside of the oven can be changed only by removing the outer case. Disconnect power to oven. Remove outer case. Disconnect wire terminals from stirrer motor. Remove screws securing stirrer motor to supporting bracket. 5.
Appendix A ©2006 Maytag Services 16026969 A–1
Dial Model - Quick Reference Guide Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements Complete Owner’s Manual available online Oven Clearances A—Allow at least 2" (5.1 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—Allow at least 2" (5.1 cm) between air discharge on back of oven and back wall.
Electronic Model - Quick Reference Guide Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements Complete Owner’s Manual available online Oven Clearances A—Allow at least 2" (5.1 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—Allow at least 2" (5.1 cm) between air discharge on back of oven and back wall. So...
Electronic Model - Quick Reference Guide Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements Complete Owner’s Manual available online No metal pans DO NOT power spray 5 15 Preprogrammed Pads (example of pad 5 shown) To cook food using preprogrammed cooking sequences: DEFROST Defrost Pad To defrost food by dividing the defrost time into periods of alternating defrost and stand times by cycling on and off: 1. Open oven door and place food in oven. Close door. 2.
