ACP HDC12A2 Manual

Commercial Microwave—Technical Information
July 2012 1 16500038
©2012 ACP, Inc.
120 V, 60 Hz Models
HDC12A2 P2002201M MDC12A2 P2002202M
P2001401M P2001402M
P2001501M P2001502M
P2003101M P2003102M
P2003601M P2003602M
P2003801M P2003802M
Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or
repair of this unit.
Refer to Service Manual for installation, operating, testing, troubleshooting, and disassembly instruction.
CAUTION
!
All safety information must be followed as provided in Service Manual.
!
WARNING
To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
Models
HDC12A2
MDC12A2
Power Source
Voltage AC
120 VAC
Amperage (Single Unit)
20 A
Frequency
60 Hz
Single Phase, 3 wire grounded
X
Receptacle
5-20R
Plug
5-20P
Power Output
Nominal microwave energy (IEC705)
1200 Watts
Minimum temperature rise (∆T)
12ºF / 6.5ºC
Operating Frequency
2450 MHz
Power Consumption
Cook Condition Microwave
1900 Watts
Dimensions
Cabinet
Width
16 3/4" (42.5 cm)
Height
13 1/2" (34.3 cm)
Depth
22" (55.9 cm)
Oven Interior
Width
13" (17.1 cm)
Height
6 3/4" (3.3 cm)
Depth
12" (30.5 cm)
Weight
Crated
73 lbs. (33 kg)
Uncrated
67 lbs. (30 kg)

Component Testing Procedures
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
16500038 July 2012
©2012 ACP, Inc.
2
Illustration
Component
Testing
Results
Thermal Cutout
Disconnect all wires from TCO.
Measure resistance across terminals.
Cavity Thermal Fuse ...................................
Magnetron TCO...........................................
Open at 219° F (104° C).
Open at 280° F (138° C) and
closed at 180° F (82° C).
Diode Assembly
Discharge Capacitors
Remove diode lead from capacitor and
connect ohmmeter.
Reverse leads for second test.
Infinite resistance in one direction
and 50KΩor more in the opposite
direction.
NOTE: Analog meter must contain a
battery of 6 volts minimum.
MT2
MT1 GATE
Triac
Disconnect wires to triac.
Measure resistance from:
MT1 to MT2.................................................
MT1 to Gate................................................
MT2 to Gate................................................
All terminals to ground.................................
Caution - Do not operate oven with
wire to terminal MT2 removed.
Infinite.
Approximately 40 Ωor more.
Infinite.
Infinite.
Capacitor Doubler
Discharge Capacitors
Remove wires from capacitor terminals and
connect ohmmeter, set on highest
resistance scale to terminals.
Also check between each terminal and
capacitor case.
Between Terminals: Meter should
momentarily deflect towards zero
then return to over 5 MΩ. If no
deflection occurs, or if continuous
deflection occurs, replace capacitor.
Terminal to Case: Infinite
resistance.
Snubber Assembly
Disconnect wires to snubber.
Measure resistance across terminals.............
Infinite.
Magnetron
Discharge Capacitors
Remove wires from magnetron and connect
ohmmeter to terminals. Also check
between each terminal and ground.
Between Terminals: Less than 1 Ω.
Each terminal to ground measures
Infinite resistance.
NOTE: This test is not conclusive. If
oven does not heat and all other
components test good replace the
magnetron and retest.
Blower Motor
Remove all wires from motor.
Measure resistance across coil.......................
Approximately 30 Ω.
Antenna motor
Remove all wires from motor.
Measure resistance across terminals..............
Approximately 3.4 KΩ.
Wire Harness
Test continuity of wires ...................................
Continuity.

Component Testing Procedures
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
July 2012 16500038
©2012 ACP, Inc.
3
Illustration
Component
Testing
Results
Terminal 1120 V
Terminal 2Common
Transformer
Discharge Capacitor
Remove all wires from terminals, and
measure resistance from:
Terminal 1 to 2.................................................
Terminal 5 to 6.................................................
Terminal 7 to 8.................................................
Terminal 4 to Ground screw on transformer.....
Terminal 4 to any other terminal ......................
Less than 1 Ω.
Less than 1 Ω.
Less than 1 Ω.
40 Ω.
Infinite resistance. If not, replace
transformer.
Primary /
Logic
Secondary
Monitor
Interlock switch
assembly
Disconnect wires to switch.
With door open measure resistance from:
Terminal C to NC Monitor .........................
Terminal C to NO Primary.........................
Terminal C to NO Logic ............................
Terminal C to NO Secondary....................
With door closed measure resistance from:
Terminal C to NC Monitor .........................
Terminal C to NO Primary.........................
Terminal C to NO Logic ............................
Terminal C to NO Secondary....................
Door Closed
Primary / Logic C
NC
NO
C
CNO
Secondary
Monitor
Continuity.
Infinite.
Infinite.
Infinite.
Infinite.
Continuity.
Continuity.
Continuity.
Touch Panel
Assembly
Continuity is indicated as 100 Ωand below.
Pin 1: Ground.
1
2
3
4
5
6
7
8
9
Split
10
Pad
1
2
3
4
5
6
7
8
9
0
Start
Stop/Reset
Power Level
X 2
Time Entry
Trace
8 & 10
7 & 10
6 & 10
5 & 10
4 & 10
3 & 10
8 & 9
7 & 9
6 & 9
5 & 9
4 & 9
4 & 8
5 & 8
6 & 8
7 & 8
Measurement
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity

Component Testing Procedures
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
16500038 July 2012
©2012 ACP, Inc.
4
Illustration
Component
Test
Results
Controller board
P1 connector used
for touch panel
ribbon
All Models
Line voltage to control board
E1 (RD) —T1 (WH) triac............................
Output drive voltage to triac
Triac terminals.............................................
Gate (BR) —T1 (WH)................................
120 VAC line voltage
Fan relay (controls blower motor, antenna
motor(s), and oven light)
Control board...............................................
Terminals T1 (WH) —J2-3 (RD)................
Control board...............................................
Terminals E1 (RD)—E4 (PK).....................
Line voltage (All Conditions)
0 VAC (Idle and Standby)
0.2 VAC (Cook)
Line voltage (Idle)
0 VAC (Standby and Cook)
Line voltage (Idle)
0 volts (Standby and Cook)
Error Code Table
Error Code
Corrective Action
F1
Replace HV/LV Board
F2
Replace HV/LV Board
F3
Replace HV/LV Board
F4
Replace HV/LV Board
F5
Replace Touch Panel
F6
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. Open door.
2. Press and hold pad 3for five (5) seconds.
NOTE: After five (5) seconds, SErv illuminates in the display.
3. Press pad 1for Magnetron Hours.
4. Press pad 2for Magnetron Cycles.
5. Press pad 3for Door Cycles.

Component Testing Procedures
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
July 2012 16500038
©2012 ACP, Inc.
5
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.
Test equipment required:
1000 ml test container and thermometer.
Digital watch / watch with a second hand for use on ovens with electromechanical timers.
Important Notes:
Low line voltage will cause low temperature rise / power output.
Ovens must be on a dedicated circuit, properly grounded, and polarized. Other equipment on the same
circuit may cause a low temperature rise / power output.
This test and results are not a true IEC705 test procedure and are only intended to provide servicers with an
easy means of determining if the microwave oven cooking output is correct.
Procedure
1. Fill the test container to the 1000 ml line with cool tap water.
NOTE: Water temperature should be approximately 60° F / 16° C.
2. Using the thermometer, stir water for five to ten seconds; measure, and record the temperature (T1).
3. Place test container of water in the center of oven cavity and close door.
4. Heat the water for a 33-second full power cycle.
NOTE: Use a digital watch or a watch with a second hand for ovens with electromechanical timers.
5. At end of the cycle, remove test container. Using the thermometer, stir water for five to ten seconds and record
temperature (T2).
6. Subtract the starting water temperature (T1), from the ending water temperature (T2) to obtain the temperature
rise (∆T).
7. If the temperature rise (∆T) meets or exceeds the minimum, the test is complete. If the temperature rise (∆T)
fails to meet the minimum temperature rise, test the line voltage to verify it is correct. Then repeat steps 1 - 6
making sure to change the water. If the temperature rise (∆T) fails to meet the minimum temperature rise again
the oven will require service.
Minimum Temperature Rise at Thirty -Three (33) Seconds Run Time
∆T Cooking ∆T Cooking ∆T Cooking ∆T Cooking
(°F) Power Output (°F) Power Output (°C) Power Output (°C) Power Output
10..................1000 20 .................2000 5 ...............1000 11 ............2000
11..................1100 21 .................2100 5.5.............1100 11.5.........2100
12..................1200 22 .................2200 6.5.............1200 12............2200
14..................1400 24 .................2400 7.5.............1400 13............2400
17..................1700 25 .................2500 9.5.............1700 13.5.........2500
18..................1800 27 .................2700 10..............1800 15............2700
19..................1900 30 .................3000 10.5...........1900 16.5.........3000

Wiring and Schematic Diagrams
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
16500038 July 2012
©2012 ACP, Inc.
6
120043101
DANGER
!
HIGH VOLTAGE

Wiring and Schematic Diagrams
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven and discharge capacitor
before servicing, unless testing requires it.
July 2012 16500038
©2012 ACP, Inc.
7
20043101
DANGER
!
HIGH VOLTAGE