This Base Manual covers Commercial Microwave Ovens with 120/230 V, 60 Hz. Refer to individual Technical Sheet for information on specific models. This manual includes, but is not limited to the following: Service Compact Commercial Microwave Oven This manual replaces RS2230003 Rev. 1 CRC21T2 CRC18T2 CRC18T2SD CRC12T2 CRC12T CRC10T2 CRC10T FSC18VP FSC12VP FSC10VP Service Manual for Amana® Menumaster® This manual is to be used by qualified appliance technicians only.
Important Product Information ! ! WARNING WARNING To avoid risk of electrical shock, injury, or death, make sure these grounding instructions are followed. Precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy. Grounding Instructions (A) Do not operate or allow oven to be operated with the door open.
Table of Contents Important Product Information ..................................... 2 Table of Contents ........................................................ 3 Important Information .................................................. 4 Important Safety Information ....................................... 5 Product Information Antenna Blade ......................................................... 8 Blower/Fan Assembly .............................................. 8 Grease Shield ........................
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.
Important Safety Information ! 9. Microwave oven should never be operated with: • Any components removed and/or bypassed • Any of the safety interlocks are found to be defective • Any of the seal surfaces are defective, missing, or damaged CAUTION Do not become exposed to radiation from the microwave generator or other parts conducting microwave energy. 10.
Important Safety Information ! CAUTION To avoid personal injury or property damage, observe the following: 7. Do not use regular cooking thermometers in oven. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to oven. 1. Briskly stir or pour liquids before heating with microwave energy to prevent spontaneous boiling or eruption. Do not overheat. If air is not mixed into a liquid, liquid can erupt in oven or after removal from oven. 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.
Product Information Antenna Blade Auto Transformer Distributes microwave energy throughout the cavity. Auto transformer in this unit provides a voltage of 120, 208, or 230 VAC. Blower/Fan Assembly Transformer High Voltage Circulates cooling air throughout the microwave oven compartment and cavity. High voltage transformer is used in this unit, which supplies high voltage A.C. for operation of the magnetron tube. Grease Shield Covers and protects the antenna blade assembly.
Installation Unpacking Oven Grounding Instructions • Remove packing and printed material from oven cavity. • 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. • If oven has been stored in extermely cold area, wait a few hours before connecting power.
Care and Cleaning Changing Oven Light Bulb ! CAUTION To avoid electrical shock hazard unplug power cord or open circuit breaker to microwave oven before replacing light bulb. After replacing light bulb, reconnect power. ! CAUTION To avoid burns and cuts, wear gloves to protect hands should bulb break. If hot, allow bulb to cool. Tools and Bulb • Protective gloves • Standard screwdriver or ¼ inch socket • Light bulb rated 120 volt, 25 watt 4.
Care and Cleaning 3. Wash shield in hot, soapy water. Rinse and dry thoroughly. ! CAUTION To avoid oven door damage, do not lift oven by oven door. • Do not wash splatter shield in dishwasher. • Do not use abrasive cleaners. 4. Reinstall splatter shield by placing front portion of the shield in first. Lift until shield slides into holes located in back of oven. Filter is located below oven door. Clean air intake filter weekly for proper air flow. Wash filter in hot water and mild detergent.
Control Pads Amana Units Menumaster Units TIME ENTRY POWER LEVEL • Use to enter heating time without changing preprogrammed number pads. • Used to view preprogrammed pads. • Deactivating control panel. • Use to select power level. Oven can heat at full or reduced power. If oven power level is set to 0% oven does not heat for programmed time. Adjust power in increments of 10%. If no power level is selected, oven operates at 100% power. • Used to program or change user options.
Displays • Shows after oven is plugged in. Open oven door to clear. READY • “Pb” or “Pd”—Indicates programming mode and current menu. See “Programming” section of manual for programming procedure. READY • “b” or “d”—Shows active menu. • “READY”—Indicates pads will accept entry. Shows when oven is paused or ready for next entry. • "bP1"—Indicates menu "b" in programming mode, and stage 1. The smaller "1" indicates pad 1 is being programmed. POWER COOK LEVEL • “88:88”—Shows heating time.
Quick Reference Instructions Read “Important Safety Information” before using “Quick Reference Instructions”. If there are unanswered questions, see detailed sections of this manual. Instructions are written for factory programmed ovens. Ovens that are reprogrammed can respond differently than described below. Operating Preprogrammed Pads 1. Open oven door, place food in oven, and close oven door. 2. Press MENU b/d pad to select preprogrammed menu. 3. Press desired number pad. 4.
Operation Power-up Display Operating Preprogrammed Pads After equipment is plugged in, display shows 4 large dashes and 1 small dash. Open and close oven door to clear display and activate pads. Equipment has 2 menus with 10 preprogrammed number pads. 1. Open oven door, place food in oven, and close oven door. • Display shows “b” or “d” and “READY”. • Fan and light operate. • If pad is not pressed in 30 seconds, open and close oven door again.
Programming Instructions Reviewing Preprogrammed Pads 1. Open oven door. • Display shows “b” or “d” and “READY”. 6. Press START pad. • Oven operates and time counts down. • Display shows heating time, “POWER”, “COOK LEVEL”. • Fan and light operate. • Display shows “POWER” only when microwave energy is present. • If door is closed or RESET pad is pressed before finishing programming sequence, oven exits programming mode. 2. Press and hold TIME ENTRY pad for approximately 5 seconds.
Programming Instructions Multiple Heating Stages Oven can be programmed to perform 4 independent heating cycles without interruption. 1. Open oven door. • Display shows “b” or “d” and “READY”. • Fan and light operate. • If door is closed or RESET pad is pressed before finishing programming sequence, oven exits programming mode. 2. Press pad 1 for approximately 5 seconds. • After 5 seconds, signal sounds. Display shows “Pb” or “Pd” indicating “b” or “d” menu. 4. Press MENU b/d pad.
Programming Instructions User Options 1. Open oven door. Display shows “MENU b OR d – READY”. • If door is closed or RESET pad is pressed before finishing programming sequence, oven exits programming mode. 2. Press and hold pad 1 for approximately 5 seconds. • After 5 seconds, signal sounds. Display shows “Pb” or “Pd” indicating “b” or “d” menu. 4. Press START pad to advance to next option. See table for options. 5. Press number pad (0,1-3) to change option. 6. Press START pad to save changes.
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 it. Illustration Component Thermal Cutout Diode Assembly Testing Disconnect all wires from TCO. Measure resistance across terminals. Cavity Thermal Fuse Magnetron TCO Discharge Capacitors Remove diode lead from capacitor and connect ohmmeter. Reverse leads for second test. Triac Disconnect wires to triac.
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 it. Illustration Component Transformer 5 6 8 4 1 3 7 2 Terminal 1− Common Terminal 2− 230 V Terminal 3−208 V #4 #1 -300 MA 1.0 F #3 -300 MA 1.0 F #2 #5 #6 #7 #8 6 7 8 1 #4 #1 4 1.0 F -300 MA 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 it.
Test Modes Microwave Power Test NOTE: Use a watch second hand, not the oven timer. (TRADITIONAL TEST METHOD) Test Equipment Needed: 4. Stir the water, measure and record the temperature of the water after heating time is completed. • Amana power test kit R0157397 (Fahrenheit) or • Menumaster power test kit M95D5 (Centigrade) 1. Fill the plastic container to the bottom of the 1000 ml. lines with cool tap water. 5.
Microwave Energy Leakage Testing ! Measurement With the Outer Case Removed WARNING ! Check for radiation leakage after servicing. Should the leakage be more than 4mW/cm2 inform Amana 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 at the customer’s location.
Troubleshooting Initial Power Up Apply power with door closed. Relays click. NO Display YES Proceed to "Standby" condition. RS2230003 Rev. 1 24 1. 2. 3. 4. 5. 6. Open fuse. Open top magnetron TCO. Open bottom magnetron TCO. Inoperative interlock switch assembly (logic). Inoperative control board. Broken or improper wire connections.
Troubleshooting Standby Condition Open oven door. Display READY b NO 1. Inoperative interlock switch assembly (logic). 2. Inoperative control 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 control board. Broken or improper wire connections. Yes Blower motor operates? NO 1. Inoperative blower motor. 2. Inoperative auto-transformer. 3.
Troubleshooting Cook Condition Place cup of water in oven and close oven door. Display READY b Push pad number 1. Pad beeps when pushed? Display NO 1. 2. 3. 4. 5. Beep not programmed into oven. Pad not programmed. Inoperative touch panel. Broken or improper wire connections. Inoperative interlock switch assembly (logic). Yes :10 POWER COOK LEVEL Display starts counting down. Open oven door, water is properly heated? Yes Oven is operating properly. Heats very slowly.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Door Removal 1. 2. 3. 4. Unplug power cord from power source. Remove outer case cover. Remove screws securing door hinges. Remove door from unit, and lay door on padded surface. Inner Door Window Disassembly 1. Open oven door. 2. Loosen screws on hingeside, 3 - 4 turns. Do not remove screws. 3.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Door / Interlock Switch Adjustment / Replacement 1. Remove outer case wrapper with caution not to damage components on circuit board. Component Board 2. Remove the 4 bolts securing hinges to oven cavity. 3. Remove door from oven. Hinge Bolts 4. Position new door on oven. 5. Loosely install 4 door hinge bolts. 6.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Back Panel Touch Panel Assembly 1. Remove outer case. 2. Remove screws securing back panel. 3. Reassemble back panel in reverse order. 1. 2. 3. 4. 5. 6. Top Antenna Assembly (some models) 1. 2. 3. 4. 5. 6. See “Component Location” Figure 1, for location. Unplug power cord from power source. Remove outer case.
Disassembly ! WARNING ! WARNING To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. To avoid radiation leakage perform microwave energy leakage test. Magnetron Cutout (TCO) 1. 2. 3. 4. 5. 6. See “Component Location” Figure 3, for location. Unplug power cord from power source. Remove outer case. Remove wiring from selected cutout. Remove screws securing cutout.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Fuse Auto Transformer 1. 2. 3. 4. 1. 2. 3. 4. See “Component Location” Figure 3, for location. Unplug power cord from power source. Remove outer case. Replace fuse and reassemble in reverse order. See “Component Location” Figure 2, for location. Unplug power cord from power source. Remove outer case and back panel.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Light Socket 1. 2. 3. 4. 5. Replacing Oven Light Bulb Unplug power cord remove outer case. Unscrew light bulb from socket. Disconnect wire terminals to light socket. Remove screw securing light socket to light retainer. Reassemble light socket in reverse order.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Component Location Figure 1 33 RS2230003 Rev.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Figure 2 RS2230003 Rev.
Disassembly ! To avoid the risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitors before following any disassembly procedure. WARNING Figure 3 35 RS2230003 Rev.
