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Service
Commercial Microwave Oven
DEC18M* & MDC18MT Models
Service Manual
This manual is to be used by qualified
service technicians only. ACP, Inc.
does not assume any responsibility for
property damage or personal injury for
improper service procedures done by
an unqualified person.
This Base Manual covers all
Commercial Microwave Ovens.
Refer to individual Technical Sheet
for information on specific models.
DEC18M
DEC18MC
DEC18MU
DEC18MCX
MDC18MT
August 2016
16400030
Revision 0
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Summary of Contents for ACP DEC18M
- Page 1 Service DEC18MC DEC18MU DEC18MCX MDC18MT Commercial Microwave Oven DEC18M* & MDC18MT Models Service Manual This manual is to be used by qualified service technicians only. ACP, Inc. does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person.
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Page 2: Table Of Contents
TABLE OF CONTENTS Important Safety Instructions ....................1-4 Oven Specifications ......................5-6 Quick Start Reference Guide ..................... 7-9 Component Location ...................... 10-15 Airflow ........................... 16-17 Component Testing ......................18-24 Wiring and Schematic Diagrams ..................25-28 Notes Page ………………………………………...………………………………………………29... - Page 3 Important Safety Information...
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Page 4: Important Safety Instructions
–Outside the U.S.A. and Canada, call 319-368-8120. –Email: Commercialservice@acpsolutions.com. Warranty service must be performed by an authorized ACP servicer. ACP also recommends contacting an authorized ACP servicer, or ACP ComServ Service Support if service is required after warranty expires. PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO... - Page 5 To avoid risk of personal injury or property damage, observe CAUTION the following safety instructions: General Use: 1. Do not use regular cooking thermometers in oven. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to oven. 2.
- Page 6 Additional Combination Oven Safety Instructions: 19. Do not pop popcorn in this oven. 20. Do not use metal utensils in oven except when recommended by microwave food manufacturers or recipe requires metal utensils in convection or combination mode. Heat food in containers made of glass or china if possible. 21.
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Page 7: Oven Specifications
Oven Specifications... - Page 8 CAUTION All safety information must be followed To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor before servicing, unless testing requires power. Models DEC18M DEC18MC DEC18MU DEC18MCX MDC18MT Power Source Voltage AC...
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Page 9: Quick Start Reference Guide
Quick Start Reference Guide... -
Page 12: Component Location
Components... - Page 13 BLOWER, CAPACITOR, DIODE, INTERLOCK BLOWER BLOWER MOTOR ASSEMBLY TRIAC CAPACITORS INTERLOCK SWITCH DIODES BASEPAN...
- Page 14 DOOR INNER DOOR HINGES WINDOW WELDMENT LATCH & SPRING HANDLE DOOR ASSEMBLY COMPLETE...
- Page 15 CONTROL BOARD, MAGNETRONS, DUCTS, FUSE UPPER ANTENNA MOTOR LOW VOLT/HIGH VOLT LOW VOLT/HIGH VOLT CONTROL BOARD CONTROL BOARD CAVITY THERMAL CUTOUT MAGNETRONS TERMINAL BLOCK FUSE EXHAUST DUCTING...
- Page 16 TRAY, CAVITY, ANTENNAS CAVITY ANTENNA SHIELD UPPER ANTENNA CERAMIC TRAY LOWER ANTENNA KIT WINDO LOWER ANTENNA MOTOR TRAY SUPPORTS AIR FILTER...
- Page 17 WRAPPER, REAR COVER, LAMP SPILL SHIELD TRANSFORMER REAR COVER LAMP POWER CORD AIR DUCT (optional) WRAPPER...
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Page 18: Airflow
Airflow... -
Page 19: Airflow
AIRFLOW 1. AIR ENTERS THROUGH FRONT FILTER 2. AIR IS DRAWN INTO BLOWER 3. AIR PUSHED THROUGH MAGNETRONS 4. AIR PUSHED CAVITY AND EXITS THROUG CAVITY DUCTS... -
Page 20: Component Testing
Component Testing... - Page 21 Illustration Component Testing Results Disconnect all wires from TCO. Measure resistance across terminals. Cavity Thermal Fuse ........Magnetron TCO ..........Thermal Cutout Open at 104° C (219° F). Open at 138° C (280° F) and closed at 82° C (180° F). Discharge Capacitors Infinite resistance should be measured in one direction and...
- Page 22 Disconnect wires to snubber. Snubber Assembly Measure resistance across terminals ....Infinite. Discharge Capacitors Between Terminals: Less than 1 Ω Remove wires from magnetron and connect ohmmeter to terminals. Also Each terminal to ground check between each terminal and measures Infinite resistance. ground.
- Page 23 Discharge Capacitor Remove all wires from terminals, and measure resistance from: 230 to Common ..........1 Ω. Terminal 5 to 6 ..........<1 Ω. Transformer <1 Ω. Terminal 7 to 8 ..........Terminal 4 to Earth screw on transformer ............. 38 Ω.
- Page 24 Continuity is indicated as 100 Ω and Traces below. 8 to 10 Continuity 7 to 10 Continuity Pin 1: Ground. 6 to 10 Continuity 5 to 10 Continuity 4 to 10 Continuity 3 to 10 Continuity 8 to 9 Continuity Touch Panel Assembly 7 to 9 Continuity...
- Page 25 Error Code Table Error Code Corrective Action Replace HV/LV Board Replace HV/LV Board Replace HV/LV Board Replace HV/LV Board Replace Touch Panel Replace HV/LV Board Usage Test The Usage Test is used to access Magnetron Hours, Magnetron Cycles and Door Cycles. Use the following procedure to access the data: 1.
- Page 26 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.
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Page 27: Wiring And Schematic Diagrams
Wiring and Schematic Diagrams... - Page 28 DEC18M P2003838M DEC18MC P2003840M DEC18MU P2003839M...
- Page 29 DEC18MCX P2003841M...
- Page 30 MDC18MT P2003842M...
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Page 31: Notes Page
NOTES PAGE 16400030 Revision 0 August 2016...
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