Service MENUMASTER COMMERCIAL MICROWAVE R OVEN 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. 1100 W - 2005 International Countertop Commercial Microwave Ovens This Base Manual covers general information. Refer to individual Technical Sheet for information on specific models.
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 .......................................4-8 Wiring ........................................................................ 8 Earthing Instructions .................................................. 8 Servicing of Earthing Products ................................... 8 General Information Placement of the Oven ............................................... 9 Radio Interference ........
Important Safety Information 4 16025963 ©2005 Maytag Services
Important Safety Information ©2005 Maytag Services 16025963 5
Important Safety Information 6 16025963 ©2005 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 Placement of the Oven Do not install microwave next to or above source of heat, such as a deep fat fryer. This could cause the microwave to operate improperly and could shorten the life of electrical components. Radio Interference Microwave oven operation may cause interference to radio, television, or similar equipment.
General Information Plug Receptacle Plug Receptacle 230 V / 13 AMP 230 V / 16 AMP Equipment requires a 230 VAC, 50 Hz, 13 amp power supply Equipment requires a 230 VAC, 50 Hz, 16 amp power supply Do not use a extension cord. If the product power cord is too short, have a qualified electrician install a three-prong receptacle. This unit should be plugged into a separate dedicated 230 VAC / 50 Hz power supply.
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 earthing before checking for trouble. Be careful of the high voltage circuit. Discharge the high voltage capacitor.
Troubleshooting Procedures 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.
Troubleshooting Procedures (Electronic Models) Trouble 2: 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. Continuity Malfunction of the monitor switch. Replace the fuse, primary, secondary, monitor switches and controller. No Continuity Replace fuse Check continuity of primary switch with door opened. Continuity Malfunction of primary switch.
Troubleshooting Procedures (Electronic Models) Trouble 3: Display shows all digits programmed, but does not start cooking when the START pad is pressed. Check continuity of secondary switch with door closed. Time does not count down after START pad is pressed. No Continuity Malfunction of secondary switch. Replace the secondary switch. Continuity Check connection between CN1 connector and controller. Continuity Failed controller. Replace controller. No Continuity Loose connection.
Troubleshooting Procedures (Electronic Models) Trouble 4: Oven operates with little or no heat. Output performance is low. Check the power supply voltage. Lower than 90% of rated voltage. Decrease in supply voltage under load. Normal Disconnect wire leads from relay RY23 and verify on and off times. Abnormal Failed controller. Customer must contact local power company or qualified electrician. Replace controller. Normal Measure the output power. Abnormal Failed magnetron Replace magnetron.
Troubleshooting Procedures (Electronic Models) Trouble 5: No microwave oscillation even when oven light and fan motor operate. No microwave oscillation. Disconnect wire leads from relay RY2 3 and verify continuity of the relay. No Continuity Check high voltage transformer. Abnormal Failed controller. Replace controller. Continuity Failed high voltage transformer. Replace high voltage transformer. Failed high voltage capacitor. Replace high voltage capacitor.
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, HI1710, and HI1801 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 Interlock switch assembly 3 Monitor 4 1 2 5 Primary 6 Secondary Testing Disconnect wires to switch. With door open measure resistance from: Monitor - Terminal 3 - 4.......................... Primary - Terminal 1 - 2 ......................... Secondary - Terminal 5 - 6.....................
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 Electronic Control RS511P URS511P Electronic Control DFS11EA RCS511A UFS11EA URCS511A Electronic Control DES11EA US11EA Dial Control DECS11MA RCS511MB UCS11MA URS511MB 22 Component Keyboard assembly Testing Continuity is indicated as 100 Ω and below.
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.
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. Power Test 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 Door Assembly ! Door Disassembly 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 ! WARNING ! CAUTION To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge the capacitors before following any disassembly procedure. Interlock Switches Primary switch is operated by bottom latch arm. A microwave leakage test must be performed anytime a door assembly is removed, replaced, disassembly, or adjusted for any reason. Control Panel Removal 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 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 Transformer Magnetron 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 and label wire leads from transformer. 4. Remove screws securing transformer and remove. 5.
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 Blower Motor or Wheel Splatter Shield 1. Disconnect power to oven and remove outer case, (see "Outer Case" procedure). 2. Remove outer case. 3. Disconnect wiring from blower motor. 4. Remove screws securing blower motor assembly to chassis. 5.
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 Thermal Cut-Out (TCO) Oven Light Removal 1. Disconnect power to oven and remove outer case, (see "Outer Case" procedure). 2. Remove outer case. 3. Remove TCO by removing screws. 4. Disconnect wiring. 5. Replace component and reverse procedure to reassemble.
Appendix A ©2005 Maytag Services 16025963 A–1
Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements Complete Owner’s Manual available online Oven Wall Clearances The switching operation of this microwave oven can cause voltage fluctuations on the supply line. The operation of this oven under unfavorable voltage supply conditions can have adverse effects. This device is intended for the connection to a power supply system with a maximum permissible system impedance Zmax of 0.2 Ohms at the interface point of the user’s supply.
Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements So...how do I use it? Complete Owner’s Manual available online (Digital Dial) Heating 1. 2. 3. 4. 5. :30 QUICK SET Pad Open oven door, place food in oven, and close oven door. Turn time entry knob clockwise until desired time displays. • Factory default setting for cooking time is 10 minutes. Cooking time can be changed and set to 60 minutes.
Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements CLEAN FILTER This oven displays CLEAN FILTER at user defined intervals. When the message displays Amana recommends cleaning the air filter thoroughly. Cleaning the air filter will not shut off the message. The message will stop displaying automatically after 24 hours. Depending on microwave use and environmental conditions, the filter may need to be cleaned more frequently.
Quick Start Reference Guide Refer to Product Safety Manual for Safety Statements Complete Owner’s Manual available online ? 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: DO NOT power spray No metal pans 1. Open oven door. • If door is closed or RESET pad is pressed before programming is complete, changes are discarded and microwave exits programming mode. 2.
