Amana Menumaster RC520T2 Manual

International Commercial Microwave—Technical Information
April 2006 1 16025979
©2006 Maytag Services
240/230 VAC, 50 Hz Models
RC5KFT2 P1331424M RC5MDTS2 P1331427M
RC5MDTM2 P1331428M RC520T2 P1331423M
•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 16022149 for installation, operating, testing, troubleshooting, and disassembly instruction.
CAUTION
!
All safety information must be followed as provided in Service Manual 16022149.
!
WARNING
To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
Models RC5KFT2 RC520T2 RC5MDTS2 RC5MDTM2
Power Source
Voltage AC 230/240 VAC 230/240 VAC 230/240 VAC 230/240 VAC
Amperage (Single Unit) 16 A 16 A 32 A 32 A
Frequency 50 Hz 50 Hz 50 Hz 50 Hz
Single Phase, 3 wire
grounded
X X X X
Plug CEE 7/7 Schucko CEE 7/7 Schucko IEC 309-32A Marechal DS3
Power Output −Microwave
Nominal microwave energy
(IEC705)
1800 Watts 2000 Watts 2400 Watts 2400 Watts
Minimum temperature rise ( ∆ T) 18ºF / 10ºC 20ºF / 11ºC 24ºF / 13ºC 24ºF / 13ºC
Operating Frequency 2450 MHz 2450 MHz 2450 MHz 2450 MHz
Power Consumption
Microwave only 2950 Watts / 12.8 A 3000 Watts / 13 A 3900 Watts / 17 A 3900 Watts / 17 A
Dimensions
Cabinet (cm in)
Width 49 cm 19 1/4" 49 cm 19 1/4" 49 cm 19 1/4" 49 cm 19 1/4"
Height 46 cm 18 1/4" 46 cm 18 1/4" 46 cm 18 1/4" 46 cm 18 1/4"
Depth 67 cm 26 1/4" 67 cm 26 1/4" 67 cm 26 1/4" 67 cm 26 1/4"
Oven Interior (cm in)
Width 33 cm 13" 33 cm 13" 33 cm 13" 33 cm 13"
Height 22 cm 8 1/2" 22 cm 8 1/2" 22 cm 8 1/2" 22 cm 8 1/2"
Depth 38 cm 15" 38 cm 15" 38 cm 15" 38 cm 15"
Weight (kg lbs)
Uncrated 52 kg 115 lbs. 52 kg 115 lbs. 52 kg 115 lbs. 52 kg 115 lbs.
Crated 56 kg 123 lbs. 56 kg 123 lbs. 56 kg 123 lbs. 56 kg 123 lbs.

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 power.
16025979 April 2006
©2006 Maytag Services
2
Illustration Component Test Results
Thermal cutout
Disconnect all wires from TCO.
Measure resistance across terminals.
Magnetron TCO ....................................
Cavity TCO ...........................................
Open at 149°C (300°F) and
closes at 125°C (257°F)
Opens at 128°C (262°F)
Diode Discharge Capacitor
Remove diode lead from capacitor and
connect ohmmeter.
Reverse leads for second test.
Infinite resistance should be measured
in one direction and 50KΩor more in
the opposite direction.
NOTE: Ohmmeter must contain a
battery of 6 volts minimum.
MT2
MT1 GATE
Triac Resistance Check
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 60 Ω
Infinite
Infinite
Triac 1 (center)
Triac 2 (left)
Triac 3 (right
Voltage Check
Measure voltage from:
MT1 to Gate
0.8 VAC when energized. If no
voltage, check H.V. board and wiring.
Capacitor
Some units may use
more then one type of
capacitor. Refer to
Parts Manual for
correct capacitor
quantity.
Discharge Capacitor
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 Capacitor
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 25 Ω

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 power.
April 2006 16025979
©2006 Maytag Services
3
Illustration Component Test Results
4
COM
230 V
5
6
Transformer
4
COM
230 VAC
5
6
Discharge Capacitor
Remove all wires from terminals.
Measure resistance from:
230 to COM.............................................
230 to Ground .........................................
Terminal 5 to 6 ........................................
Terminal 4 to Ground ..............................
Less than 1 Ω
Infinite
Less than 1 Ω
Approximately 65 Ω
7
8
2
4
3
5
Interlock switch
Door Closed
2
4
7
3
5
8
Primary
Secondary
Monitor
Disconnect wires to switch.
With door open measure resistance from:
Terminal 2 to 3 ........................................
Terminal 4 to 5 ........................................
Terminal 7 to 8 ........................................
With door closed measure resistance from:
Terminal 2 to 3 ........................................
Terminal 4 to 5 ........................................
Terminal 7 to 8 ........................................
Infinite
Infinite
Indicates continuity
Indicates continuity
Indicates continuity
Infinite
Lamp receptacle
(some models)
Test continuity of receptacle terminals. Indicates continuity if bulb is good
and screwed in.
Antenna motor Remove all wires from terminals.
Measure resistance from:
Terminal to terminal ....................................
Approximately 12K Ω
01
2468
Relay
This relay contains a
diode in the coil
circuit.
Measure resistance from:
Terminal 0 to terminal 1 (coil)..................
01
24
68
Approximately 6 to 7 MΩ
Black
White
Brown
Blue
Line filter
Disconnect wire from terminals.
Measure resistance of the following
terminals:
White to Blue..........................................
Black to Brown .......................................
< 1 Ω
< 1 Ω
Terminal block Visual check. Verify fuse holding terminals are not
damaged.
Verify terminals are not damaged.
Refer to Parts Manual
for proper power cord
part number.
Power cord Measure resistance of wires. Continuity should be indicated on
each wire.
Verify polarity and grounding.

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 power.
16025979 April 2006
©2006 Maytag Services
4
Illustration Component Test Results
Side touch panel Continuity is indicated as 100 Ωand
below.
1
Pad
1
2
3
4
5
6
7
8
9
0
Start
Stop/Reset
Trace
3 & 5
3 & 6
3 & 7
3 & 8
3 & 9
4 & 5
4 & 6
4 & 7
4 & 8
4 & 9
5 & 6
6 & 9
Measurement
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Top touch panel Removal of touch panel is required to
perform test.
Continuity is indicated as 100 Ωand
below.
1
Pad
Time Entry
Power Level
Stage
Program Save
Quantity
Menu
Hidden Pad
Trace
5 & 7
5 & 8
5 & 9
6 & 7
6 & 8
7 & 9
8 & 9
Measurement
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Display board
J1
J5
J6 J4
Pin 1
Pin 1
Pin 1
Pin 1
Side
Touch
Panel
Connector
H.V. board
Connector
Interlock
Connector
Top
Touch
Panel
Connector
A B
Test Points
Function Test Set-Up Meter
Setting
Probe Placement Results
Input to Display
Board
At Display
Board
Volts Test points A and B 3.0 VAC
If voltage is present and no display is
indicated, replace display board.
If no voltage is present, check wire
harness connections and H.V. board.

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 power.
April 2006 16025979
©2006 Maytag Services
5
H.V. board
Pin 1 E1
E2E3
J5
J1
J2
E4
E5
J3
J4
E7
E6
J7
J6
J8
Pin 28
Pin 1
Pin 1
Pin 1
Pin 1Pin 1
Pin 1
Pin 1
Pin 50
Function Test Set-Up Meter
Setting
Probe Placement Results
Input to H.V. board At H.V. board Volts J1 pin 1 (Brown wire)
& J1 pin 2 (White wire)
Line voltage
Output to display
board
Disconnect
J5 connector,
blower runs
continuously
Volts J5 pin 28 &
J5 pin 50
−24 VDC
NOTE: For the following test, place oven in Service Test Mode (see page 10).
Relay Function Test Set-Up Meter
Setting
Probe Placement Results
K1 at
230 VAC
line voltage
Blower motor
Antenna motor
Cavity light
Disconnect
J2 connector
Ohms J1 pin 1 (Brown wire)
& J2 pin 4
Test mode 5 off −no continuity
Test mode 5 on −< 1 Ω

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 power.
16025979 April 2006
©2006 Maytag Services
6
H.V. Board −Relay Test
Three Magnetron Models
Relay Function Test Set-Up Meter
Setting
Probe Placement Results
K8 Magnetron 1
(Top rear) at
230 VAC
All wires
connected to
H.V. board
VAC E2 (Black wire)
& J4 pin 2 (Red wire)
Test mode 1 off - line voltage
Test mode 1 on - 0 volts
K4 Magnetron 2
(Top front) at
230 VAC
All wires
connected to
H.V. board
VAC E5 (Red wire)
& J3 pin 1 (Gray wire)
Test mode 2 off - line voltage
Test mode 2 on - 0 volts
K6 Magnetron 3
(Bottom) at
230 VAC
All wires
connected to
H.V. board
VAC J4 pin 4 (Black wire)
& J4 pin 6 (Black wire)
Test mode 3 off - line voltage
Test mode 3 on - 0 volts
“CALL SERV” ― Will appear in the display when there is a fault occurring with the unit. After
servicing the unit, the servicer must reset the service code to remove “CALL
SErv” from the display.
1 seconds ON 1 seconds ON
The display will then be OFF for 5 seconds
STG
COOK
PREHEAT STANDBY
ITEM POWER
CM
1
2
3
4
QTY
LEVEL
NOT READY
LMT
STG
COOK
PREHEAT STANDBY
ITEM POWER
CM
1
2
3
4
QTY
LEVEL
NOT READY
LMT
Oven door must be closed.
Unit must be in OFF condition
or
INITIAL power up mode.
Press Hidden Pad.
Display will indicate the Service Test Mode.
MC units
REG MENU
MISC
RC5KFT units
1. Enter Service Code by pressing the following pads in order shown:
HIDDEN ENABLE pad, 1pad, 3pad, 5pad, 7pad, and 9pad.
2. Press 0pad to clear “CALL SErv” from the display. Display will indicate “C L r”.
3. Press STOP/RESET pad to exit Service Test Mode.

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 power.
April 2006 16025979
©2006 Maytag Services
7
Three Magnetron Models
# 1
# 1
# 1
# 1
# 2
# 2
# 2
# 2
# 3
# 3
# 3
# 3
H.V. System # 1 H.V. System # 2 H.V. System # 3
Top Rear Magnetron
Center Transformer
Bottom Center Capacitor
Diode
Center Triac
Top Front Magnetron
Left Transformer
Top Left Capacitor
Diode
Left Triac
Bottom Magnetron
Right Transformer
Right Capacitor
Diode
Right Triac

Power Testing Procedure
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
16025979 April 2006
©2006 Maytag Services
8
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 (Amana power test kit R0157397 Fahrenheit / Menumaster power
test kit M95D5 Celsius).
•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 procedures 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

Diagnostics Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
April 2006 16025979
©2006 Maytag Services
9
CAUTION
!
All repairs as described in this troubleshooting section are to be performed only after the caution procedures one through eight listed
below have been followed.
1. Check grounding before checking for possible causes.
2. Be careful of the high voltage circuit.
3. Discharge high voltage capacitor.
4. When checking the continuity of the switches or the high voltage transformer, disconnect one lead wire from these parts and then
check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
5. Do not touch any parts of the circuitry on the P.C. Board circuit since static electric discharge may damage this control panel.
Always touch yourself to ground while working on this panel to discharge any static charge in your body.
6. 240/230 VAC is present in the high voltage circuit board, power relay and primary circuit of low voltage transformer.
7. When troubleshooting, be cautious of possible electrical hazard.
8. When testing convection operation, convection fan may start at any time or if oven is hot.
Error Codes
During operation, the display may show the following service codes:
NOTE: Before scheduling service for any error codes, instruct customer to unplug oven for 1 minute,
reconnect power, and retest. If unit operates properly, no service call is required.
Display Description Corrective Action
Err1 Failed H.V. Board Replace H.V. board.
Err2 Failed H.V. Board
Shorted Touch Panel
Shorted Display Board
Shorted Cable HV to Display Board
Replace H.V. board.
Replace Touch Panel.
Replace Display Board.
Replace Cable.
Err3 Failed H.V. Board Replace H.V. board.
Err4 Failed H.V. Board Replace H.V. board.
Err5 Shorted Touch Panel NOTE: If Touch Panel is pressed for more than 30 seconds, this error code
will appear.
1. Disconnect oven from power supply.
2. Disconnect side touch panel connector from display board (J5).
3. Reconnect oven to power supply.
4. If “Err5” reappears after 30 seconds, replace top touch panel.
5. If “Err5” does not reappear after 30 seconds, replace side touch panel.
Err6 Failed H.V. Board Replace H.V. board.
HOT •Open TCO (magnetron).
•Blower motor inoperative.
•Restricted air filter.
•H.V. board inoperative.
•High ambient temperature.
•Oven operated empty or with light loads.
•Broken or loose wire.
Door Door Interlock Primary Switch •Verify latch mechanism moves freely on door.
•Verify J1 connector on display board is properly seated.
•Test interlock switch assembly and perform door adjustment if necessary.
•Replace interlock switch assembly.
CALL
SErv
Amperage monitoring System on H.V.
Board
•Power interruption while oven is operating may cause this code to display
when power is restored.
•Reset CALL SErv , Service Test procedure – Pad “0”
•Place water load inside cavity and use pre-programmed pad to operate
oven for 30 seconds or more.
•If CALL SErv does not appear, no further repairs are necessary.
•If CALL SErv reappears, use Service Test procedure to operate each
H.V. system independently to isolate fault.
•Replace H.V. Board If Call SErv display will not clear.
•Reset CALL SErv after fault has been corrected.

Service Test
16025979 April 2006
©2006 Maytag Services
10
PREHEAT STANDBY
C
LEVEL
READY
PREHEAT STANDBY
C
LEVEL
READY
PREHEAT STANDBY
C
LEVEL
READY
1
2
3
1 3 5 7 9
To Enter Service Test Mode, oven door must be closed.
NOTE: Unit must be in OFF condition
or
INITIAL power up mode.
Toggles Magnetron 2
(Top Front) ON/OFF.
Timer counts up to 62 seconds and unit shuts off.
Timer counts up to 62 seconds and unit shuts off.
STGITEM POWERQTY
LMT
Component Evaluation
PREHEAT STANDBY
C
LEVEL
READY
0 = Deactivated
1 = Activated
Displays actual Amperage,
will vary by model
Indicates
Service
Mode
If no Amperage, check for line
voltage at H.V. transformer
primary winding.
If no voltage, check:
Interlock switch (secondary)
Triac 3
H.V. board (relay K6 if 230 VAC,
and triac 3 drive voltage T1 - G)
Wiring
If voltage is present, check:
H.V. components and wiring.
NOTE: Pads will not beep when accessing Service Test Mode.
Toggles Magnetron 3
(Bottom) ON/OFF.
Toggles Magnetron 1
(Top Rear) ON/OFF. Timer counts up to 62 seconds and unit shuts off.
If no Amperage, check for line
voltage at H.V. transformer
primary winding.
If no voltage, check:
Interlock switch (secondary)
Triac 1
H.V. board (relay K8 if 230 VAC,
and triac 1 drive voltage T1 - G)
Wiring
If no Amperage, check for line
voltage at H.V. transformer
primary winding.
If no voltage, check:
Interlock switch (secondary)
Triac 2
H.V. board (relay K4 if 230 VAC,
and triac 2 drive voltage T1 - G)
Wiring
To EXIT Service Test Mode press STOP/RESET pad.
High Voltage System # 1
High Voltage System # 2
High Voltage System # 3
Displays actual Amperage,
will vary by model
Displays actual Amperage,
will vary by model
If voltage is present, check:
H.V. components and wiring.
If voltage is present, check:
H.V. components and wiring.
Press Hidden Pad
as indicated above
on touch panels.
MC units
REG MENU
MISC

Service Test
April 2006 16025979
©2006 Maytag Services
11
CM
QTY
LEVEL
CM
QTY
LEVEL
CM
QTY
LEVEL
CM
QTY
LEVEL
LMT
LMT
LMT
LMT
6
7
8
9
PREHEAT STANDBY
CM
LEVEL
READY
5
If no fan operation, check:
Blower motor and wheel
Antenna motor
Cavity light (if applicable)
H.V. board relay K1 - 230 V
relay K2 - 208V
Wiring
NOT ACTIVE
This mode is NOT active
with these models.
PREHEAT STANDBY
C
LEVEL
READY
4
NOT ACTIVE
This mode is NOT active
with these models.
CM
QTY
LEVEL LMT
0
Pressing 0 will clear
CALL SERVICE display.
CM
QTY
LEVEL LMT
This will continue until
Call Service is cleared
from the display.
CALL is displayed for 1 second
SErv is displayed for 1 second.
Then the display will be
OFF for 5 seconds.

Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
16025979 April 2006
©2006 Maytag Services
12

Wiring Diagram and Schematic
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor
before servicing, unless testing requires power.
April 2006 16025979
©2006 Maytag Services
13
DANGER
!
HIGH VOLTAGE