Service Countertop Commercial Microwave Ovens This Base Manual covers general information Refer to individual Technical Sheet for information on specific models This manual includes, but is not limited to the following: RCS10TS RCS10DS MCS10TS MCS10DS P2001101M P2001102M P2001103M P2001104M 16400009 November 2010
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 Disassembly Procedures Important Safety Information.......................................... 4 Disconnecting Wire Terminals................................... 27 Grounding Instructions................................................ 7 Outer Case ............................................................... 27 Servicing of Grounded Products................................. 8 Door Assembly........................
Important Safety Information ! WARNING Read the following information to avoid possible exposure to microwave radiation: The basic design of the ACP 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 microwave 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. 8.
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. 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. 2.
Important Safety Information ! WARNING To avoid risk of personal injury or property damage, observe the following: 1. Briskly stir or pour liquids before heating with 7. Do not use regular cooking thermometers in oven. microwave energy to prevent spontaneous boiling Most cooking thermometers contain mercury or eruption. Do not overheat. If air is not mixed and may cause an electrical arc, malfunction, or into a liquid, liquid can erupt in oven or after damage to oven. removal from oven. 8.
Important Safety Information Grounding Instructions Precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy, or electrical shock disconnect power to oven. WARNING • Do not operate or allow oven to be operated with door open.
Important Safety Information Explanation 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.
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. Equipment Placement • Do not install equipment 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.
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 grouding before checking for trouble. Be careful of the high voltage circuit. Discharge the high voltage capacitor.
Troubleshooting Procedures (Electronic Models) Trouble 1: CONDITION Fuse blows. Oven does not operate at all, no inputs can be accepted. CHECK RESULT Check continuity of interlock monitor switch with door closed Continuity No Continuity CAUSE REMEDY Malfunction of interlock monitor switch Replace Interlock Switch Assembly Shorted contacts of primary interlock switch.
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: CONDITION No microwave 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. Continuity Poor continuity Check continuity filament tap (3.3V) of high voltage. No Continuity Continuity in the reverse direction.
Troubleshooting Procedures (Electronic 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 (Electronic Dial Models) CONDITION Outlet has proper voltage Fuse does not blow. CHECK RESULT CAUSE REMEDY Check continuity of magnetron No Continuity Defective magnetron Replace Check continuity of power supply cord No Continuity Open power supply cord Replace Normal Defective touch control circuit Replace Malfunction of secondary interlock switch Replace Display do not turn on countdown Trouble 2: Oven does not start cooking, even though the dial is rotated.
Troubleshooting Procedures (Electronic Dial Models) Trouble 3: CONDITION No microwave oscillation No microwave oscillation even though oven lamp turns on.
Troubleshooting Procedures (Electronic Dial Models) Trouble 4: The following visual conditions indicate a probable defective touch control circuit. 1. Incomplete segments, 1) the LED light segments missing. 2) the partical light segments missing. 2. A distinct change in the display is not on when they should be. 3. One or more LED lights in the display are not on when they should be. 4. Display does not count down or up with time cooking. 5. Oven is programmable and cooks normally but no display shows.
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 Fuse block / Filter assembly Interlock switch assembly Testing Results Power In terminals ...................................... 120 VAC Power Out terminals ................................... 120 VAC If no power in, check power outlet If no power out, check fuses Disconnect wires to switch.
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. 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. Outer Case 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. Door Assembly 5. Remove screws securing choke assembly to outer door panel. CAUT IO N 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. Remove outer case, see "Outer Case" procedure. 3.
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. Control Panel (Electronic) 1. 2. 2. 3. 4. Disconnect power to oven. Remove outer case, see "Outer Case" procedure. Disconnect and label wires from control board. Open oven door. Remove screw securing control panel to cavity. Lift control panel up and out to release tabs. 7. Remove timer couple from timer. 8.
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. Interlock Assembly Adjusting Interlocks Primary switch is operated by the top latch arm. Interlock Switch Removal 1. Disconnect power to oven and remove outer case, (see "Outer Case" procedure). 2. Remove control panel, (see "Control Panel" section). 3. Remove mounting screws securing interlock switch to unit chassis. 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. 4. Remove screw securing capacitor strap to bottom plate. 5. Slide capacitor out of capacitor strap and remove capacitor. 6. Replace capacitor and reverse procedure to reassemble. NOTE: When replacing H.V. components, route H.V. wires at least 1/4" from all grounded surfaces to prevent arcing. Transformer 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. Tray Replacement 1. Unplug oven from outlet. 2. Using a suction cup or a thin bladed screwdriver, pry upward on front corners and remove tray from unit. 3. Thoroughly clean and degrease sump area. 4.
