MENUMASTER Service 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. International Countertop Commercial Microwave Ovens RC5PHBU2 RC5PHB2 RC520T2 RC5KFT2 RC5MCTP2 RC5MCTS2 RC5MDTS2 RC5MDTM2 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 Wiring ..................................................................... 8 Earthing Instructions ............................................... 8 Servicing of Earthing Products ................................ 8 General Information Unpacking Oven ..................................................... 9 Oven Placement .....................
Important Safety Information 4 16022149 ©2005 Maytag Services
Important Safety Information ©2005 Maytag Services 16022149 5
Important Safety Information 6 16022149 ©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 Unpacking Oven • Inspect oven for damage such as dents in door or 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 oven operation may cause interference to radio, television, or similar equipment.
General Information Receptacle Plug Receptacle Plug 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 Power Up Plug oven into power source with oven door closed. YES Error Code Appears. ITEM C M STG QTY 1 2 3 4 Proceed to DISPLAY DIAGNOSTICS. POWER NO LMT PREHEAT NOT READY STANDBY COOK LEVEL 1. 2. 3. 4. 5. 6. YES POWER UP CONDITION NORMAL ©2005 Maytag Services 16022149 No line voltage. Inoperative power cord. Inoperative fuse. Inoperative display board. Inoperative H.V. board. Broken or loose wire connection.
Troubleshooting Standby Condition Open oven door. ITEM C M STG QTY 1 2 3 4 LMT POWER PREHEAT NOT READY STANDBY NO COOK LEVEL 1. Inoperative interlock switch assembly (primary). 2. Inoperative H.V. board. 3. Broken or improper wire connections. Yes Oven light is on? NO 1. 2. 3. 4. 5. Inoperative light bulb. Inoperative light socket. Inoperative auto-transformer. Inoperative H.V. board. Broken or improper wire connections. 1. 2. 3. 4. Inoperative blower motor. Inoperative auto-transformer.
Troubleshooting Cook Condition Place cup of water in oven and close oven door. Flashing ITEM C M NO STG QTY 1 2 3 4 LMT POWER PREHEAT NOT READY COOK LEVEL STANDBY 1. Beep not programmed into oven. 2. Pad not programmed. Display indicates 00:00 and beeps rapidly. 3. Inoperative touch panel. 4. Inoperative H.V. board. 5. Broken or improper wire connections. Push pad number 1. Pad beeps when pushed? Yes ITEM C M STG QTY 1 2 3 4 LMT POWER PREHEAT NOT READY STANDBY NO COOK LEVEL 1.
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. Refer to Technical Sheets for specific model information. Illustration Component Thermal cutout Test Disconnect all wires from TCO. Measure resistance across terminals. Magnetron TCO .................................. Magnetron TCO .................................. Magnetron TCO ............................
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. Refer to Technical Sheets for specific model information. Illustration 6 COM Component Transformer Test Discharge Capacitor Remove all wires from terminals. 5 4 5 230 V Measure resistance from: 230 to COM............................................. 230 to Ground ........................................
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. Refer to Technical Sheets for specific model information. Illustration Component Side touch panel Test Continuity is indicated as 100 Ω and below. 1 Top touch panel Removal of touch panel is required to perform test. Continuity is indicated as 100 Ω and below.
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. Refer to Technical Sheets for specific model information. H.V. board Pin 1 J8 Pin 1 E1 J6 E3 E2 Pin 28 Pin 1 J5 Pin 50 J1 Pin 1 J7 Pin 1 Pin 1 J2 E4 E7 E5 E6 J4 J3 Pin 1 Function Test Set-Up Input to H.V. board At H.V.
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. Refer to Technical Sheets for specific model information. NOTE: For the following test, place oven in Service Test Mode.
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. Three Magnetron Models #1 #2 #3 #2 #1 #3 #2 #3 #1 #1 #3 #2 H.V. System # 1 Top Rear Magnetron Center Transformer Bottom Center Capacitor Diode Center Triac ©2005 Maytag Services H.V. System # 2 Top Front Magnetron Left Transformer Top Left Capacitor Diode Left Triac 16022149 H.V.
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. Two Magnetron Models #1 #1 #1 #3 #3 #3 #3 #1 H.V. System # 1 Top Rear Magnetron Left Transformer Top Capacitor Diode Left Triac 20 H.V.
Power Testing Procedure ! 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.
Display Diagnostics ! WARNING To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor before servicing, unless testing requires power. ! 1. 2. 3. 4. 5. 6. 7. 8. 9. CAUTION All repairs as described in this troubleshooting section are to be performed only after the caution procedures one through eight listed below have been followed. Check grounding before checking for possible causes. Be careful of the high voltage circuit.
Service Test NOTE: Unit must be in OFF condition or INITIAL power up mode. To Enter Service Test Mode, oven door must be closed. NOTE: Pads will not beep when accessing Service Test Mode. To EXIT Service Test Mode press STOP/RESET pad. MC units REG MENU MISC Press Hidden Pad as indicated above on touch panels.
Service Test Press Display 4 NOT ACTIVE 5 ITEM STG QTY C M NOT ACTIVE 7 Displays # of Magnetron Hours. 8 Displays # of Door Cycles with a 1 to 1 ratio rounded to the nearest ten 9 Clears Hours and Cycles (press START to activate) (Resets to 0). POWER 1 2 3 4 POWER LMT 1 2 3 4 POWER 1 2 3 4 POWER LMT ITEM STG QTY C M 1 2 3 4 POWER LMT ITEM STG QTY C M 1 2 3 4 POWER LMT CALL is displayed for 1 second SErv is displayed for 1 second. Then the display will be OFF for 5 seconds.
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.
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 it. 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).
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.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Door Handle Inner Door Ring Assembly Remove door handle by removing plactic plugs to gain access to set screws. Loosen set screws (3/32 inch allen screws), one located to the left of the door handle and one located on the bottom of the door handle. 1. Remove latch handle. 2. Remove outer door assembly. 3.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Outer Case Top Touch Panel Assembly 1. Remove screws securing outer case to chassis, see illustration below. 2. Slide outer case back and lift off. 3. Reassemble outer case in reverse order. 1. 2. 3. 4. 5. Back Panel 1. Remove outer case. 2. Remove screws securing back panel. 3. Reassemble back panel in reverse order.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Interlock Switch Module Top Rear Magnetron 1. 2. 3. 4. 5. 1. 2. 3. 4. See “Component Location” Figure 1, for location. Remove outer case. Disconnect wiring from interlock switch assembly. Remove mounting screws securing interlock switch. When replacing assembly, all wires must be connected before operating oven.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Magnetron Cutout (TCO) Microwave Blower Wheel and Motor 1. 2. 3. 4. 5. 1. Remove outer case and back panel. 2. Remove wiring from blower motor terminals. 3. Remove screws securing blower assembly to bracket. 4. Remove assembly from oven. 5. Loosen allen set screw securing blower wheel to motor shaft. 6.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Top Antennas Bottom Antenna 1. 2. 3. 4. 1. Remove oven tray, see “Oven Tray Removal” procedure. 2. Lay oven on it’s left side and open oven door. 3. Remove bottom access cover. 4. Remove gear retainer from plastic gear. 5. While supporting antenna, carefully pry gear from antenna shaft. 6.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Fuse Replacing Oven Light Bulb 1. See “Component Location” Figure 3, for location. 2. Remove outer case. 3. Replace fuse and reassemble in reverse order. ! NOTE: If fuse needs replaced, interlock assembly must be replaced.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure. Component Location Display Module Touch Panel (Top) Antennas Top front antenna on 3 tube ovens are blue tipped. All other antennas are plain tipped.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure.
Disassembly ! WARNING To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitors before following any disassembly procedure.
