Sensor Cooking Condition; Cooking Sequence - Wolf MWD24-2 Service Manual

Theory of Operation

SENSOR COOKING CONDITION

Using the SENSOR function, food is cooked without figuring time, power level or quantity. When the oven senses
enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking
time and power level needed for best results. When the food is cooked, water vapor is developed, the sensor "sens-
es" the vapor and its resistance increase gradually. When the resistance reaches the value set according to the
menu, supplementary cooking is started.
The time of supplementary cooking is determined by experiment with each food category and inputted into the LSI.
An example of how sensor works (See Figures 3-26, 3-27 and 3-28 below):
Figure 3-26. Potatoes at room temperature.
Vapor is emitted very slowly.
COOKING SEQUENCE (See Figure 3-29):
1. Touch one of the SENSOR pads.
NOTE: The oven should not be operated on sensor immediately after plugging in the unit. Wait two minutes
before cooking on SENSOR.
2. The coil of shut-off relay (RY-) is energized, but the power transformer is not turned on.
3. After about 3-86 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave
energy is produced and first stage is started. The 3-86 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 drawer or touch the STOP/CLEAR pad.
4. 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 drawer may be opened to stir, turn or season food.
5. 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.
6. Opening the drawer or touching the STOP/CLEAR pad, the time of the day will reappear on the display and the
oven will revert to an OFF condition. When the timer reaches zero, an audible signal sounds.
Touch any SENSOR pad, then open drawer or touch STOP/CLEAR pad
#813632 - Revision B - December, 2009
Drawer Microwave
AH SENSOR
Figure 3-28. Sensor detects moisture and humidity
and calculates cooking time and variable power.
Figure 3-29. Cooking Sequence
(Models MWD24-2 / MWD30-2)
Figure 3-27. Heat Potatoes.
Moisture and humidity is emitted very rapidly.
You can smell the aroma as it cooks.
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