ACP DEC18M User manual

Service
Commercial Microwave Oven
DEC18M* & MDC18MT Models
Service Manual
This Base Manual covers all
Commercial Microwave Ovens.
Refer to individual Technical Sheet
for information on specific models.
DEC18M
DEC18MC
DEC18MU
DEC18MCX
MDC18MT
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.
16400030
Revision 0
August 2016

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

1
Important Safety Information
1

IMPORTANT SAFETY INSTRUCTIONS
For additional product documentation or more detailed operating instructions visit:
www.acpsolutions.com
CONTACTINFORMATION
Any questions or to locate an authorizedACP servicer, call ACP ComServ Service Support.
–Inside the U.S.A. or Canada, call toll-free866-426-2621.
–Outside the U.S.A. and Canada, call319-368-8120.
–Email:Commercialservi[email protected].
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.
Important Safety Information. Read before using this oven.
Keep these instructions for future reference.
If the oven changes ownership, be sure this guide accompanies oven.
PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO
EXCESSIVE MICROW A VE ENERGY
A. DO NOT attempt to operate this oven with the door open since open door operation can result
in harmful exposure to microwave energy . It is important not to defeat or tamper with the safety
interlocks.
B. DO NOT place any object between the oven front face and the door or allow soil or cleaner
residue to accumulate on sealing surfaces.
C. DO NOT operate the oven if it is damaged. It is particularly important that the oven door close
properly and that there is no damage to the:
1. door (bent)
2. hinges and latches (broken or loosened)
3. door seals and sealing surfaces.
D. The oven should not be adjusted or repaired by anyone except properly qualified service
personnel.

Toavoid risk of personal injury or property damage, observe
the followingsafety 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. Never use paper, plastic, or other combustible materials that are not intended for cooking.
3. When cooking with paper, plastic, or other combustible materials, follow manufacturer’s
recommendations on product use.
4. Do not use paper towels which containnylon or other synthetic fibers. Heated synthetics
could melt and cause paper to ignite.
5. Toavoid surface deterioration, keep the oven in a clean condition. Infrequent cleaning
could adversely affect the life of the applianceand possible result in a hazardous situation.
6. Clean oven regularly and remove any food deposits.
Heating Foods and Liquids:
7. Liquids such as water, coffee, or tea are ableto be overheated beyond the boiling point
without appearing to be boiling due to surfacetension of the liquid. Visible bubbling or
boilingwhen the container is removed from the microwave oven is not always present.
THIS COULD RESULT IN VERY HOT LIQUIDS SUDDENLY BOILING OVER WHEN A
SPOONOR OTHER UTENSIL IS INSERTEDINTO THE LIQUID. Toreduce the risk of
injury to persons:
•Do not overheat the liquid.
•Stir the liquid both before andhalfway through heating it.
•Do not use straight-sided containerswith narrow necks.
•After heating, allow the container to stand in the microwave for a short time
before removing it.
b. Use extreme care when inserting aspoon or other utensil into the container.
8. Do not deep fat fry in oven. Fat couldoverheat and be hazardous to handle.
9. Do not cook or reheat eggs in shell or with an unbroken yolk using microwave energy.
Pressure may build up and erupt. Pierce yolk with fork or knife before cooking.
10. Pierce skin of potatoes, tomatoes, and similar foods before cooking with microwave
energy. When skin is pierced, steam escapes evenly.
11. Do not heat sealed containers or plastic bags in oven. Food or liquid could expand
quickly and cause container or bag to break. Pierce or open container or bag before
heating
12. Do not heat baby bottles in oven.
13. Baby food jars shall be open when heated and contents stirred or shaken before
consumption, in order to avoid burns.
14. Never use oven to heat alcohol or food containing alcohol as it can more easilycatch
fire if overheated.
Additional Microwave Oven Safety Instructions:
15. Do not operate equipment without load or foodin oven cavity.
16. Use only popcorn in packages designed and labeled for microwave use. Popping time
varies depending on oven wattage. Do not continue to heat after popping has
stopped. Popcornwill scorch or burn. Do not leave ovenunattended.
17. Do not use metal utensils in oven.
18. An authorized servicer MUST inspectequipment annually. Record all inspections and
repairs for future use.
CAUTION

Additional Combination Oven SafetyInstructions:
19. Do not pop popcorn in this oven.
20. Do not use metal utensils in oven exceptwhen 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. Oven temperature is at least 450°F in convection mode. Verify plastic, paper or other
combustible materials are recommended by the manufacturer to withstand the
maximum oven temperature.
22. Racks, utensils, rack guides, and oven surfaces may become hot during or after use.
Useutensils or protective clothing, like pan grips or dryoven mitts, when necessary to
avoid burns.
23. Do not unplug oven immediately after use. Internal fan must cool oven to avoid
damageof electrical components.
24. Caution: Toavoid burns, do not use containers loaded with liquid or kitchen products
that become liquid by heating at levels abovethose that can be easily observed.

2
Oven Specifications
5

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
230/240V
220/240V
230/240V
220/240V
220V
Amperage (single unit)
16A
16A
13A
16A
20A
Frequency
50HZ
50HZ
50HZ
50HZ
60hz
Single phase, 3 wire grounded
Yes
Yes
Yes
Yes
Yes
Plug
Power Output
Nominal microwave energy (IEC705)
1800W
2000W
1800W
2000W
1800W
Minimum temperature rise (∆T)
Operating frequency
2450 MHz
2450 MHz
2450 MHz
2450 MHz
2450 MHz
Power Consumption
Cook condition microwave
2900W
3100W
3100W
3100W
3100W
Dimensions
Cabinet
Width
419 cm (16.5 in)
419 cm (16.5 in)
419 cm (16.5 in)
419 cm (16.5 in)
419 cm (16.5 in)
Height
343 cm (13.5 in)
343 cm (13.5 in)
343 cm (13.5 in)
343 cm (13.5 in)
343 cm (13.5 in)
Depth (includes door handle)
549 cm (21.63 in)
549 cm (21.63 in)
549 cm (21.63 in)
549 cm (21.63 in)
549 cm (21.63 in)
Oven Interior
Width
330 cm (13 in)
330 cm (13 in)
330 cm (13 in)
330 cm (13 in)
330 cm (13 in)
Height
171 cm (6.75 in)
171 cm (6.75 in)
171 cm (6.75 in)
171 cm (6.75 in)
171 cm (6.75 in)
Depth
305 cm (12 in)
305 cm (12 in)
305 cm (12 in)
305 cm (12 in)
305 cm (12 in)
Weight
Crated
34 kg (74 lbs)
34 kg (74 lbs)
34 kg (74 lbs)
34 kg (74 lbs)
34 kg (74 lbs)
Uncrated
31 kg (68 lbs)
31 kg (68 lbs)
31 kg (68 lbs)
31 kg (68 lbs)
31 kg (68 lbs)
Installation
Unpacking Oven
Inspect oven 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.
If oven has been stored in extremely cold area, wait a few hours before connecting power.
Radio Interference
Microwave operation may cause interference to radio, television, or similar. Reduce or eliminate interference by
doing the following:
Clean door and sealing surfaces of oven according to instructions in “Care and Cleaning” section.
Place radio, television, wireless routers, etc. as far away as possible from oven.
Use a properly installed antenna on radio, television, etc. to obtain a stronger signal reception.
CAUTION
!
!
WARNING

3
Quick Start Reference Guide
7

4
Components
10

BLOWER, CAPACITOR, DIODE, INTERLOCK
BLOWER
ASSEMBLY
CAPACITORS
DIODES
INTERLOCK
SWITCH
BLOWER MOTOR
BASEPAN
TRIAC

DOOR
DOOR ASSEMBLY
COMPLETE
HANDLE
WELDMENT
INNER DOOR
WINDOW
HINGES
LATCH & SPRING

CONTROL BOARD, MAGNETRONS, DUCTS, FUSE
LOW VOLT/HIGH VOLT
CONTROL BOARD
UPPER ANTENNA MOTOR
MAGNETRONS
FUSE
LOW VOLT/HIGH VOLT
CONTROL BOARD
CAVITY THERMAL CUTOUT
EXHAUST DUCTING
TERMINAL BLOCK

TRAY, CAVITY, ANTENNAS
ANTENNA SHIELD
LOWER ANTENNA MOTOR
LOWER ANTENNA KIT
CERAMIC TRAY
TRAY SUPPORTS
WINDO
W
AIR FILTER
UPPER ANTENNA
CAVITY

WRAPPER, REAR COVER, LAMP
LAMP
WRAPPER
POWER CORD
REAR COVER
AIR DUCT
(optional)
TRANSFORMER
SPILL SHIELD
15

5
Airflow
16

AIRFLOW
1. AIR ENTERS THROUGH FRONT FILTER
3. AIR PUSHED THROUGH MAGNETRONS
2. AIR IS DRAWN INTO BLOWER
4. AIR PUSHED CAVITY AND EXITS THROUG CAVITY DUCTS

6
Component Testing
18