Panasonic NN-C2000P, Service Manual

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6.4. Combination cooking control
Combination cooking is accomplished by microwave and
convection
cooking being done alternately during one
combination cooking cycle. One combination cooking cycle is
22 seconds.
1. During combination cooking, the digital programmer circuit
controls ON-OFF time of both power relay 1 and 7 as
shown in Figure.
2. When the power relay 1 (RY1) is turned on, heater turns off
and after the power relay 1 turns off, power relay 7 turns on.
NOTE 1: Note that the heater may not be on during a heater
on period if the preprogrammed oven temperature has
been reached. This is due to the fact that the oven is
keeping the preprogrammed oven temperature constant,
so of course the heater will only be on when it is needed
and off when it is not needed.
NOTE 2: As for temperatures of combination cooking for
6.5. One touch Auto sensor
cooking
Auto sensor cooking is a revolutionary way to cook by
microwave without setting a power level or selecting a time. All
that is necessary is to select an Auto sensor Program before
starting to cook.
Understanding of Cooking
As food cooks, a certain amount of steam is produced. If the
food is covered, this steam builds up and eventually escapes
from the container. In Auto Sensor Cooking, carefully designed
instrument, called the humidity sensor element, senses this
escape of steam. Then, based upon the Auto Sensor Program
selected, the unit will automatically determine the correct power
level and the proper length of time it will take to cook the food.
NOTE: Auto Sensor Cooking is successful with the foods
and recipes found in the Auto Sensor Cooking Guide.
convection, the temperatures by each program are
preprogrammed in the microprocessor as shown in Figure.
Because of the vast differences in food composition, items
not mentioned in the Cooking Guide should be prepared in
the microwave oven using power select and time features.
Please consult Variable Power Microwave Cookbook for
procedures.
Explanation of the Auto Sensor Cooking process
1) The shaded columns in Figure indicate when the humidity
sensor heater is on.
2) During the 30 second period there is no microwave activity.
When calculating the T2 time by using the formula below, make
sure this 30 seconds is subtracted from the T0 time.
3) T1 time To time - 30 seconds
4) T2 time When the steam escapes from the cooking
container placed in the oven, the humidity sensor detects it and
the microprocessor calculates the balance of cooking time.
This T2 time is then shown in the display and begins counting
down.
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NN-C2000P / NN-C2000W