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 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 manual.
Table of Contents Important Information .................................................... 2 Important Safety Information ......................................... 4 Microwave Leakage Testing .......................................... 5 General Information Specifications ............................................................ 7 Placement of the Oven ............................................... 7 Location of Model Number ......................................... 7 Model Identification .............
Important Safety Information ! CAUTION Read the following information to avoid possible exposure to microwave radiation: The basic design of the Maytag and 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 microwave oven 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.
Microwave Leakage Testing ! Measurement With the Outer Panel Removed W ARNING Check for radiation leakage after servicing. Should the leakage be more than 4mW/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. and HEW regulations. This requirement must be strictly observed. In addition, the leakage reading must be recorded on the service repair ticket while in the customer’s home.
General Information This manual provides basic instructions and suggestions for handling, installing , and servicing microwave ovens. The directions, information, and warnings in this manual are developed from experience with, and careful testing of the product. If the unit is installed according to the Installation Instructions, it will operate properly and will require minimal servicing. A unit in proper operating order ensures the consumer all the benefits provided by efficient microwave cooking.
General Information Specifications Refer to individual Technical Sheet for specification information. Placement of the Oven This microwave can be easily placed in the kitchen, family room, or anywhere else in the house. Place the oven on a flat surface such as a kitchen countertop or a specially designed microwave oven cart. Do not place oven above a gas or electric range. Free air flow around the oven is important. Do Not Block Air Vents All air vents must be kept clear during cooking.
General Information Electrical Requirements Grounding Instructions The oven is designed to operate on a Standard 120 VAC, 60 HZ household outlet. This appliance must be grounded. If an electrical short circuit occurs, grounding reduces the risk of electric shock by providing an escape wire for the electric current. The cord for this appliance has a grounding wire with a grounding plug. Put the plug into an outlet that is properly installed and grounded.
General Information Microwave Oven Description ©2004 Maytag Services 16023057 Rev.
Troubleshooting Procedures ! WARNING To avoid risk of electrical shock, personal injury, or death, disconnect power to oven before servicing, unless testing requires it. ! 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.
Troubleshooting Procedures Measure resistance of control key panel after removing ribbon connector. Key pad matrix is located in “Testing Procedures” located on Pages 20 & 21. Is continuity indicated when key pad is pressed? NO NO Replace control key pad. Does ribbon connector have proper connection? Reconnect ribbon connector for proper connection. Replace circuit board. Unit operates. Check Touch Keypad Measure resistance of CN2 between pin 1 and pin 3 with door closed.
Troubleshooting Procedures Check Air Vents Unit operates normal, but little or no heating is produced with an oven load. Check if fan motor operates when START is pressed. Does fan motor operate when START is pressed? NO NO Place a jumper wire across thermostat. Replace high voltage capacitor. Does capacitor have correct resistance? See Testing Procedures. Replace magnetron. Replace thermostat. NO Unit operates. Measure resistance of fan motor. Replace circuit board.
Troubleshooting Procedures Check Primary/Secondary Interlock Switches and Thermostat Unit does not heat even if display counts down when START pad is pressed for high power. Check the contacts of relays 8, 10, 11. See Testing Procedures. NO Replace circuit board. Does ribbon connector have proper connection? NO Reconnect ribbon connector for proper connection. Replace circuit board. Unit operates. Unit does not heat even if display counts down when START pad is pressed for high power.
Troubleshooting Procedures Check Power Supply and Fuse Ventilation fan does not operate when FAN HIGH/LOW pad is pressed. Does magnetron thermal fuse and oven thermostat have the correct resistance? Measure resistance of magnetron thermal fuse and oven thermostat. Verify proper connection of ribbon connector. Does ribbon connector have proper connection? NO NO Replace circuit board. Reconnect ribbon connector for proper connection. Replace ventilation fan. NO Unit operates.
Troubleshooting Procedures Relay FAN motor and oven lamp turn on without touching START key when the door is closed. YES NO Remove the male connector of I/O CON from the circuit board. Does the unit still operate? GOOD NO Replace circuit board YES Defective RELAY1 Replace circuit board FAN motor and oven lamp turn on when the door is closed and START key is touched.
Troubleshooting Procedures Oven Error Code Display Touchpad Display F1 F2 F3 F4 F5 Error Mode Thermistor Open Thermistor Short Before Cooking Thermistor Short After Cooking Sensor Open Damper Switch Sensing Error Checkout Procedure: Fuse PROBLEM Fuse blows immediately after door is closed. Fuse blows immediately after door is opened. Fuse blows when door is closed and START key is touched. CAUSE Improper operation of the primary interlock, secondary interlock switches and/or interlock monitor switch.
Testing Procedures ! WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage capacitor before servicing, unless testing requires power. Illustration Component High voltage transformer 120 V Secondary Primary Filament 0V Magnetron Test Procedure Discharge Capacitor Disconnect connector and measure continuity with meter on R x 1 scale: Secondary..................................... Filament ........................................
Testing Procedures ! WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage capacitor before servicing, unless testing requires power. Illustration Component Primary Interlock Switch Test (Top Switch) Test Procedure Measure resistance between terminals 1 and 2: Door Open............................................... Door Closed ............................................
Testing Procedures ! WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage capacitor before servicing, unless testing requires power. Illustration Component Ventilation Motor Test Procedure Measure across terminals Convection motor Remove all wires from motor. Measure resistance across coil................. 1 2 3 Sensor Measure resistance across pins 2 & 3 ...... Remove all wires from heater.
Testing Procedures ! WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage capacitor before servicing, unless testing requires power. Illustration Component Touch Pad/Control Panel Model AMV6177AA* FPC CONNECTOR Top 1 2 3 4 5 6 7 8 9 10 11 12 13 20 Test Procedure Removal of Touch Pad/Control Panel is required to perform test. Check for continuity. When touched: Less than 400 Ω When not touched: More than 1 Mega Ω 16023057 Rev.
Testing Procedures ! WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage capacitor before servicing, unless testing requires power. Illustration Component Touch Pad/Control Panel Model MMV6178AA* FPC CONNECTOR Top 1 2 3 4 5 6 7 8 9 10 11 12 13 ©2004 Maytag Services Test Procedure Removal of Touch Pad/Control Panel is required to perform test. Check for continuity.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G 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. 3. To place door back on unit, place bottom pin into hole first and then align the top pin.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G P.C. Board The p.c. board is located at the top on back of the control panel.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G Control Key Panel The key panel has one ribbon connection on the p.c. board. Vent plate The key panel pads can be checked through a continuity test. Operations of key pad can be checked by measuring connections at end of ribbon, (using high ohms scale).
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G Interlock Door Latch Switches Primary switch is operated by the top latch pawl. Interlock Switch Removal 1. Disconnect power to oven and remove control panel, (see "Control Panel" procedure). 2. Discharge high voltage capacitor, (see "High Voltage Capacitor" procedure). 3.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G High Voltage Capacitor High voltage capacitor should always be discharged by shorting a terminal to a chassis ground. The capacitor has a internal "shunt" resistor, but the mechanical discharge should always be performed to avoid personal injury. High Voltage Capacitor Removal 1.
Disassembly Procedures ! W AR NIN G ! W ARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. A microwave leakage test must be performed anytime a magnetron assembly is removed, replaced, disassembled or adjusted for any reason.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G Turntable Motor 3. Remove damper. 4. Lift blower assembly out and disconnect wire connection wire terminal. 1. Disconnect power to oven. 2. Remove screws securing bottom plate cover. 5. Reassemble in reverse order. NOTE: Place blower assembly wires in slotted area to avoid pinching of wires. 3.
Disassembly Procedures ! To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. W AR NIN G Convection Heater Element Removal Grill Heater Element Removal 1. See “Convection Motor Removal”, perform steps 1 through 9. 2. Remove screws at and next to terminals securing wires and element to heater box. 3. Release metal clip securing element to heater box. 4. Remove element from heater box. 5.
Appendix A ©2004 Maytag Services 16023057 A–1
Installation Instructions A–2 16023057 ©2004 Maytag Services
Installation Instructions Refer to Service Parts Catalog for correct Upper Cabinet Template part number.
Installation Instructions m~I qI j~~ v ~ ~~ ~~W Carton or other heavy material for covering the counter top.
Installation Instructions pqbm NW m~ q b~ ` t ^ o k f k d ^slfa bib`qof`^i pel`h> qefp ^mmif^k`b jrpq _b dolrkaba> 1. Locate the grounded electric outlet for this oven in the cabinet above the oven, as shown in Figure 4. r `~ klqbW The outlet should be on a circuit dedicated to the microwave oven (120V, 60 Hz., AC only) with a 15 or 20A fused electrical supply. fjmloq^kqW If you do not have the proper wall outlet, you MUST have one installed by a qualified electrician.
Installation Instructions Models AMC4080AA*, MMC5080AA* A–6 16023057 ©2004 Maytag Services
Installation Instructions pqbm OW m~ q s p p~~ c klqbW If the existing duct is round, you must use a rectangular-to-round adapter, with a rectangular 3” extension duct installed between the damper assembly and the adapter to prevent the exhaust damper’s sticking. a i The total length of the duct system, including straight duct, elbows, transitions, and wall or roof caps ~ NQM .
Installation Instructions STEP 3: Prepare The Venting Blower W A R N I N G To avoid risk of property damage, unplug the microwave oven or disconnect power at source by removing fuse or throwing circuit breaker. To avoid risk of personal injury, wear protective gloves when handling mounting plate. DO NOT PULL OR STRETCH THE BLOWER WIRING! Pulling and stretching the blower wiring could result in electrical shock. Your microwave oven is shipped with the blower assembled for room (recirculating) venting.
Installation Instructions ©2004 Maytag Services 16023057 A–9
Installation Instructions STEP 4: Prepare The Wall & Upper Cabinet W A R N I N G To avoid personal injury or property damage, do not attempt to install this microwave oven if you cannot find a wall stud. Measure And Track/Tape Up The Templates 1. Using a plumb line and (metal) measuring tape, find and mark the vertical center line on the back wall, as in Figure 22. 2. Find and mark one or two points where the studs are on the wall. (Studs are normally 16 inches apart).
Installation Instructions pqbm QW m~ q t~ C r `~ t ^ o k f k d q ~ ~ I ~ ~ W : k ~ ~ ~ ~ ~K : i~ ~ ~ ~ ~ ~ ~ K t ^ o k f k d q ~ ~ I ~ ~ I K a q e f
Installation Instructions STEP 5: Install The Mounting Plate The Oven Must Be Connected To At Least One Wall Stud. 1. Draw a vertical line on the wall at the center of the 30 wide space. Use the mounting plate as the template for the rear wall. Place the mounting plate on the wall, making sure that the tabs are against the bottom of the cabinet. Line up the notch and center line on the mounting plate to the center line on the wall.
Installation Instructions ©2004 Maytag Services 16023057 A – 13
Installation Instructions STEP 6: Attach The Oven To The Wall W A R N I N G To avoid risk of personal injury or property damage, you will need two people to install this microwave oven. 1. Carefully lift microwave oven and hang it on support tabs (See Figure 26 at the bottom of the mounting plate.) Reaching through upper cabinet, thread power supply cord through the power supply cord hole in the bottom of the upper cabinet. See Figure 30. power cord power cord hole 2.
Installation Instructions STEP 6: Attach The Oven To The Wall 5. Roof venting installation: Install ductwork through the vent opening in the upper cabinet. Complete the venting system through the roof according to the method needed. See Figure 33. See PREPARE THE VENTING SYSTEM, STEP 2. Use caulking gun to seal the exterior roof opening around the exhaust cap. See Figure 6. 6. Use the power supply cord clamp to bundle the power supply cord.
Appendix B ©2004 Maytag Services 16023057 Rev.
Use and Care Information B–2 16023057 Rev.
Use and Care Information ©2004 Maytag Services 16023057 Rev.