Acp MXP20, AXP20MK, AXP20JB, AXP20QT, AXP20 User Manual
______________
Service Manual
High Speed Combination Oven
60 Hz
January 2011
AXP20
P1333601M
P1333602M
AXP20JB
P1333606M
AXP20MK
P1333612M
AXP20QT
P1333610M
MXP20
P1333614M
P1333615M
16400002 Rev.3
TABLE OF CONTENTS
IMPORTANT INFORMATION ....................................................................................................1
IMPORTANT SAFETY INFORMATION ................................................................................ 2-5
Oven Specications ..............................................................................................................6
Oven Construction ........................................................................................................... 7-12
Oven Performance Test ................................................................................................. 13-14
Troubleshooting ............................................................................................................. 15-19
Display Diagnostics ..............................................................................................................20
Service Test .................................................................................................................... 21-28
Touch Screen Calibration .....................................................................................................29
Component Test Procedures ......................................................................................... 30-31
Quick Start Reference Guide ......................................................................................... 32-35
EZ Card Programming .........................................................................................................36
Wiring and Schematic Diagrams .................................................................................... 37-40
AXP/MXP Care and Cleaning ............................................................................................ A-2
- ii -
Important Information
Important Notices for Servicers and Consumers
ACP 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. Products should be serviced only by a qualied 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 information. IT IS THE TECHNICIANS RESPONSIBLITY TO REVIEW ALL
APPROPRIATE SERVICE INFORMATION BEFORE BEGINNING REPAIRS.
! WARNING
To avoid risk of severe personal injury or death, disconnect power before working/servicing on appliance to avoid
electrical shock.
To locate an authorized servicer please contact:
ComServ Support Center
Web Site Telephone Number
WWW.ACPSOLUTIONS.COM
E-Mail: commercialservice@acpsolutions.com
Recognize Safety Symbols, Words, and Labels
....................... 1-866-426-2621 or 319-368-8195
DANGER!
DANGER— Immediate hazards which WILL result in severe personal injury or death.
WARNING!
WARNING— Hazards or unsafe practices which COULD result in severe personal injury or death.
!
CAUTION
CAUTION— Hazards or unsafe practices which COULD result in minor personal injury, product or property
damage.
1
Important Safety Information
WARNING
!
Read the following information to avoid possible exposure to microwave radiation:
The basic design of the 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 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.
8. Do not for any reason defeat the interlock
switches there is not valid reason for this action
at any time; nor will it be condoned by ACP.
2. Before servicing the unit (if unit is operable) perform
the microwave leakage test.
3. The oven should never be operated if the door does
not t properly against the seal, the hinges or hinge
bearings are damaged or broken; the choke is
damaged, (pieces missing, etc.); or any other
visible damage can be noted. Check the choke
area to ensure that this area is clean and free of all
foreign matter.
4. If the oven operates with the door open and
produces microwave energy, take the following
steps:
A. Tell the user not to operate the oven.
B. Contact ACP ComServ
5. Always have the oven disconnected when the outer
case is removed except when making the "live"
tests called for in the Service Manual. Do not
reach into the equipment area while the unit is
energized. Make all connections for the test and
check them for tightness before
into the outlet.
6. Always ground the capacitors on the magnetron
lter box with an insulated-handle screwdriver
before working in the high voltage area of the
equipment compartment. Some types of failures
will leave a charge in these capacitors and the
discharge could cause a reex action which could
make you injure yourself.
immediately.
plugging the cord
9. IMPORTANT: Before returning a unit to a
customer, be sure to check for proper switch
interlock action.
10. The Microwave Oven should never be
operated with any components removed and/or
bypassed or when any of the safety interlocks are
found to be defective, or when any of the seal
surfaces are defective, missing, or damaged.
11. All microwave ovens meet all requirements
of the radiation control for Health and Safety Act of
1968. Due to measurement uncertainties, the
maximum leakage for the eld will be 4mw/cm .
12. To ensure that the unit does not emit excessive
microwave leakage and to meet the
of Health and Human Services guidelines, check
the oven for microwave leakage using a microwave
oven leakage meter that complies with US
Government CDRH / FDA / DHHS requirements
and or any other local government requirements.
The maximum leakage level allowed by ACP
is 4mw/cm .
13. If servicer encounters an emission reading over
4mw/cm
contact the ACP ComServ Department
immediately for further direction. ACP
will contact the proper Government
Agency upon verication of the test results.
2
2
, the servicer is to cease repair and
Department
2
7. Always remember that in the area of the
transformer there is HIGH VOLTAGE. When the
unit is operating keep this area clear and free of
anything which could possibly cause an arc or
ground, etc.
2
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, re, or injury to persons.
1. READ all instructions before using equipment.
2. READ AND FOLLOW the specic
“PRECAUTIONS TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE
ENERGY”.
3. This equipment MUST BE GROUNDED. Connect
only to properly GROUNDED outlet. See
“GROUNDING INSTRUCTIONS”.
4. Install or locate this equipment ONLY in
accordance with the installation instructions in this
manual.
5. Some products such as whole eggs and sealed
containers, for example, closed glass jars may
explode and SHOULD NOT be HEATED in this
oven.
6. Use this equipment ONLY for its intended use as
described in this manual. Do not use corrosive
chemicals or vapors in this equipment. This type
of oven is specically designed to heat or cook. It
is not designed for industrial or laboratory use.
7. As with any equipment, CLOSE SUPERVISION
is necessary when used by CHILDREN.
8. DO NOT operate this equipment if it has a
damaged cord or plug, if it is not
properly, or if it has been damaged or dropped.
9. This equipment, including power cord, must be
serviced ONLY by qualied service personnel.
Special tools are required to service equipment.
Contact nearest authorized service facility for
examination, repair, or adjustment.
10. DO NOT cover or block lter or other openings
on equipment.
11. DO NOT store this equipment outdoors. DO
NOT use this product near water, for example,
near a kitchen sink, in a wet basement, or near
a swimming pool etc.
12. DO NOT immerse cord or plug in water.
13. Keep cord AWAY from HEATED surfaces.
14. DO NOT let cord hang over edge of table or
counter.
15. See door cleaning instructions in “Care and
Cleaning” section.
16. For commercial use only.
working
To reduce risk of re in the oven cavity:
a. DO NOT overcook food. Carefully attend
equipment if paper, plastic, or other combustible
materials are placed inside the oven to facilitate
cooking.
b. Remove wire twist-ties from paper or plastic
bags before placing bag in oven.
SAVE THESE INSTRUCTIONS
CAUTION
!
c. KEEP oven DOOR CLOSED, turn oven o, and
disconnect the power cord, or shut o power at
the fuse or circuit breaker panel, if materials
inside the oven should ignite. Fire may spread
if door is opened.
d. DO NOT use the cavity for storage. DO NOT
leave paper products, cooking utensils, or food
in oven.
3
Important Safety Information
CAUTION
!
To avoid risk of personal injury or property damage, observe the following:
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.
2. Do not deep fat fry in oven. Fat could overheat
and be hazardous to handle.
3. 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.
4. Pierce skin of potatoes, tomatoes, and similar
foods before cooking with microwave energy.
When skin is pierced, steam escapes evenly.
5. Do not operate equipment without load or food in
oven cavity.
6. Do not use regular cooking thermometers in oven.
Most cooking thermometers contain mercury and
may cause an electrical arc, malfunction, or
damage to oven.
7. Do not heat baby bottles in oven.
8. Never use paper, plastic, or other combustible
materials that are not intended for cooking.
When cooking with paper, plastic, or other
9.
combustible materials, follow manufacturer's
recommendations on product use.
10. 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.
11. To avoid pacemaker malfunction, consult
physician or pacemaker manufacturer about
eects of microwave energy on pacemaker.
PRECAUTIONS TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWAVE 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 qualied service
personnel.
SAVE THESE INSTRUCTIONS
4
Important Safety Information
Grounding Instructions
WARNING
!
To avoid risk of electrical shock, injury or death; make
sure these grounding instructions are followed.
WARNING
!
Do not remove grounding prong when installing
grounded appliance in a home or business that does
not have three wire grounding receptacle, under no
condition is grounding prong to be cut o or removed.
It is the personal responsibility of the consumer to
contact a qualied electrician and have properly
grounded three prong wall receptacle installed in
accordance with appropriate electrical codes.
WARNING
!
To avoid the risk of electrical shock or death, do not
alter the plug.
WARNING
!
To avoid the risk of electrical shock or death, this
equipment must be grounded.
This equipment MUST be grounded. In the event of an
electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the
electric current. This oven is equipped with a cord
having a grounding wire with a grounding plug. The plug
must be plugged into an outlet that is properly installed
and grounded.
Consult a qualied electrician or servicer if grounding
instructions are not completely understood, or if doubt
exists as to whether the equipment is properly
grounded.
Do not use an extension cord. If the product power cord
is too short, have a qualied electrician install an appropriate
receptacle. This oven should be plugged into a
separate 50 or 60 hertz circuit with the electrical rating as
shown in the appropriate drawing. Models operate with a
208 or 230 supply voltage. When an oven is on a
circuit with other equipment, an increase in cooking
times may be required and fuses can be blown.
5
SPECIFICATIONS
Models
AXP20
AXP20JB P1333606M
AXP20QT P1333610M
AXP20MK P1333612M
P1333601M / P1333602M
Power Source
Voltage AC 208/230 VAC
Amperage (Single Unit) 30 A
Frequency 60 Hz
Single Phase, 3 wire grounded X
Receptacle 6-30R
Plug 6-30P
Power Output – Microwave
Nominal microwave energy (IEC705)
Minimum Temperature Rise (∆T)
2200 Watts
22°F / 12°C
Operating Frequency 2450 MHz
Power Consumption 5700 Watts
Microwave only 4200 Watts
Convection fan 425 Watts / 6200 RPM
Radiant heater 3000 Watts
Convection heater 2000 Watts
Combination 5300Watts
Dimensions
Cabinet (in / cm)
Width
Height
Depth (includes bracket on back)
25” 63.5 cm
20 .25” 51 cm
25.625” 65 cm
Oven Interior (in / cm) – useable space
Width 16.0” 41 cm
Height 7.75” 20 cm
Depth 15.0” 38 cm
Weight (lbs. / kg)
Uncrated
Crated
150 lbs. 68 kg
175 lbs. 79 kg
6
OVEN CONSTRUCTION
PANELS (TOP & SIDE)
OVEN CONSTRUCTION-
Door
Right Outer
Panel
AXP
Torx (T-15)
Air Filters
Top Outer
Panel
Left Outer
Panel
Outercase Back
Adaptor Board
(AXP20QT Only)
Torx (T-15)
7
OVEN CONSTRUCTION-
OVEN CONSTRUCTION
CONTROL PANEL ASSEMBLY
Touch Screen Display
Control Holder
Display Board
Knob Collar
Knob
Bezel
Touch Panel Assembly
Data Key Plug
Filter
Board
Data Key Board
Data Key Board Holder
Caution: Do not handle touch screen display
by the sides. This may damage the display
circuitry. Handle using the corners.
8
OVEN CONSTRUCTION
Circuit Boards
OVEN CONSTRUCTION-
Power Relay
Limiter
Triac
Thermocouple
Temp Sensor (RTD)
Cooling Fans
Convection Motor
Convection
Motor
Main Board
*Relay Monitor
Board
*Power Relay
Snubber
Power Supply Board
(24 VDC)
Limiter
Triac
(TR4) -Radiant
Heater
*Note: If Main Fuse (F1) is blown
replace Relay Monitor Board
and Power Relay.
Temp Sensor
(RTD Radiant)
Thermocouple
Cooling Fans
9
OVEN CONSTRUCTION
HV Transformers
OVEN CONSTRUCTION-
Magnetrons
Fuses
Sensor
Triac’s
Magnetron TCO’s
Capacitor / Diodes
High Voltage Transformers
Capacitor
Diode
(Right Side)
Magnetron # 1
Temp Sensor
(RTD Convection)
Small Fuses
F2,F3,F4 (12 amp)
F2 - Convection Motor
F3 - Magnetron # 1
F4 - Magnetron # 2
Switch
(Primary)
Triac (TR1)
(Magnetron # 1)
Triac (TR2)
(Magnetron # 2)
Triac (TR3)
(Convection Heater)
Magnetron TCO’s
Magnetron # 2
Large Fuses
F1,F5,F6 (25 amp)
*F1 - Main Fuse
F5 - Convection Heater
Capacitor
Diode
(Left Side)
Control
Transformer
(AXP20QT Only)
F6 - Radiant Heater
Fuse (2.5A)
(AXP20QT Only)
*Note: If Main Fuse (F1) is blown
replace Relay Monitor
Board and Power Relay.
10
OVEN CONSTRUCTION-
Oven Switch Replacement &
Interlock Switch Adjustment
Attach Ohm-Meter to
Wire Harness Connectors
Switch Adjustment
Lever
Adjustment
Switch Test:
When the door is opened or closed, the left door hinge activates the secondary / monitor switches.
1. Connect an ohm-meter to wire harness (as shown in figure 1, to verify switch activation).
Note: The switch assembly should activate when the door gap is approximately 1/4 inch (6mm).
Switch Adjustment:
1. Loosen mounting screws.
2. Slide adjustment lever for proper switch activation.
3. Tighten mounting screws.
4. Preheat oven to set temperature and verify switch adjustment settings and function.
Note: To ensure proper switch adjustment, the switch mounting MUST be tightened after each adjustment
prior to testing the door alignment.
Figure 1
Mounting Screw
Replacement
Removal:
1. Remove switch assembly
mounting screw.
2. Push switch assembly 1/2 inch (13mm)
towards back of oven.
3. Twist mounting leg towards
oven cavity to release mounting tab.
4. Push assembly towards back of oven
to remove.
Note: New replacement switch assembly
has been adjusted at the factory, no adjustment
should be necessary.
Mounting Leg
Mounting Screw
11
OVEN CONSTRUCTION-
Antenna Motor
Cam
Gear Assembly
Antenna
Rivet, Plastic
Radiant Heater
Multi-Wave Spring Washer
Flat Washer
Lock Nut
Cam
Note: Requires 15/16” (26mm)
Deep Socket
See Detail Below
*Note: Plastic Rivet
cannot be reused.
Antenna Motor
Rivet, *Plastic
Gear Assembly
Alignment Arrows
Antenna
12
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