Electrolux FGMO205KBA, Service Manual

Page: 15 / 48

Section 2 Operation
2-3
POWER LEVEL P-0 TO P-90 COOKING
When Variable Cooking Power is programmed, the
120 volts A.C. is supplied to the power transformer
intermittently through the contacts of relay (RY2) which
is operated by the control unit within a 32 second time
base. Microwave power operation is as follows:
Vari-Mode ON TIME OFF TIME
Power 10 (High) (100% Power) 29 sec. 0 sec.
Power 9 (P-90) (Approx. 90%) 26 sec. 3 sec.
Power 8 (P-80) (Approx. 80%) 23 sec. 6 sec.
Power 7 (P-70) (Approx. 70%) 20 sec. 9 sec.
Power 6 (P-60) (Approx. 60%) 17 sec. 12 sec.
Power 5 (P-50) (Approx. 50%) 14 sec. 15 sec.
Power 4 (P-40) (Approx. 40%) 11 sec. 18 sec.
Power 3 (P-30) (Approx. 30%) 8 sec. 21 sec.
Power 2 (P-20) (Approx. 20%) 5 sec. 24 sec.
Power 1 (P-10) (Approx. 10%) 3 sec. 26 sec.
Power 0 (P-0) (0% power) 0 sec. 29 sec.
SENSOR COOKING CONDITION
Using the SENSOR function, the foods are 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 food is cooked, water vapor is developed. The
sensor “senses” the vapor and its resistance increases
gradually. When the resistance reaches the value set
according to the menu, supplementary cooking is started.
The time of supplementary cooking is determined by
experiments with each food category and inputted into
the LSI.
The ON/OFF time ratio does not correspond with
the percentage of microwave power, because
approximately 2 seconds are needed for heating of
the magnetron filament.
NOTE
2. Heat Potatoes. Moisture and humidity is emitted
rapidly. You can smell the aroma as it cooks.
3. Sensor detects moisture and humidity and
calculates cooking time and variable power.
An example of how the sensor works:
(BAKED POTATOES)
1.
Potatoes at room temperature. Vapor is emitted
very slowly.