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R-930AK-F
R-930AW-F
Cooking Sequence.
1. Touch SENSOR COOK pad.
NOTE: The oven should not be operated on SENSOR
COOK immediately after plugging in the unit. Wait
two minutes before cooking on SENSOR COOK.
2. Select desired Sensor setting.
3. Touch START pad.
The coil of shut-off relay (RY1, RY6) is energized, the oven
lamp and cooling fan motor are turned on, but the power
transformer is not turned on.
4. After about 16 seconds, the cook relay (RY-2) is energized.
The power transformer is turned on, microwave energy is
produced and first stage is started. The 16 seconds is the
cooling time required to remove any vapor from the oven
cavity and sensor.
NOTE: During this first stage, do not open the door or touch
STOP/CLEAR pad.
5. When the sensor detects the vapor emitted from the food,
the display switches over to the remaining cooking time and
the timer counts down to zero. At this time, the door may be
opened to stir food, turn it or season, etc.
6. When the timer reaches zero, an audible signal sounds.
The shut-off relay and cook relay are de-energized and the
power transformer, oven lamp, etc. are turned off.
7. Opening the door or touching the STOP/CLEAR pad, the
time of day will reappear on the display and the oven will
revert to an OFF condition.
COMPU BROIL/ COMPU ROAST/ COMPU BAKE
COMPU BROIL/ ROAST/ BAKE will automatically compute the
oven temperature, microwave power and cooking time for bak-
ing, roasting and broiling. Set the desired program by touching
the COMPU BROIL/ ROAST/ BAKE pad, and number pad. Enter
the weight by touching the Number pads. When the START pad
is touched, the following operations occur:
1. The COOK indicator will light and the Convection Fan
Symbol will rotate.
2. The cooking time will appear on the display and start
counting down to zero. The cooking time is adjusted
automatically according to the weight of the food.
3. The shut-off relays (RY1, RY5 and RY6) are energized,
turning on the oven lamp, turntable motor, cooling fan motor
and convection motor. The power supply voltage is applied
to the heating element.
4. Now, the oven is in the convection cooking mode.
5. When the oven temperature has reached the programmed
convection temperature, the oven goes into the programmed
cooking mode.
6. At the end of the COMPU BROIL/ ROAST/ BAKE cycle, the
damper is returned to the open position and the oven will go
to the off condition. The cooling fan will remain on until the
oven has cooled.
COMPU DEFROST COOKING
The COMPU DEFROST key is a special function key to defrost
meats and poultry faster and better. COMPU DEFROST auto-
matically defrosts roast beef, etc.. When the COMPU DE-
FROST is selected and the food weight is entered by using the
COMPU DEFROST pad, the oven will cook according to the
special cooking sequence.
FIRE SENSING FEATURE (MICROWAVE MODE)
This model incorporates a sensing feature which will stop the
oven's operation if there is a fire in the oven cavity during
microwave cooking. This is accomplished by the LSI repeat-
edly measuring the voltage across the temperature measure-
ment circuit (thermistor) during it's 32-seconds time base
comparing the obtained voltage measurements. If the most
recent voltage measured is 300mV greater than the previous
voltage measured, the LSI judges it as a fire in the oven cavity
and switches off the relays to the power transformer, fan motor
and convection motor. The LSI also stops counting down and
closes the damper door so that no fresh air will enter the oven
cavity. Please refer to the following section for a more detailed
description.
Operation
Please refer to the timing diagrams below.
1. The thermistor operates within a 32-seconds time base and
it is energized for three (3) seconds and off for 29 seconds.
Two (2) seconds after the thermistor is energized, the
voltage across the temperature measurement circuit is
sampled by the LSI and twenty one (21) seconds after the
thermistor is cut off the LSI turns on the cooling fan for six
(6) seconds.
2. The above procedure is repeated. If the difference between
the first voltage measured (in step 1) and the voltage measured
when the procedure is repeated (step 2) is greater than
300mV the LSI makes the judgment that there is a fire in the
oven cavity and will switch off the relays to the power
transformer, fan motor and convection motor. The LSI also
stops counting down and closes the damper door so that no
fresh air will enter the oven cavity.
3. Once the fire sensor feature has shut the unit down, the
programmed cooking cycle may be resumed by pressing
the "START" pad or the unit may be reset by pressing the
"CLEAR" pad.
0 2
3
24
CONVECTION
ON
MOTOR
OFF
3 sec.
THERMISTOR
ON
OFF
ON
Sensing
Voltage
OFF
Sensing the voltage across the temperature measurement circuit.
IMPORTANT:
During sensor cooking operation, the fire sensing opera-
tion sequence will not begin until the AH sensor has
detected vapors and initiated a sensor cooking cycle. This
is because the operation of the convection fan would
interfere with the AH sensor's vapor detection.
8
30
32 (sec.)
64 (sec.)
6 sec.
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