GE Profile Performance ADVANTIUM SCA2000BAA Service Manual page 27

VOLTAGE COMPENSATION
Voltage fluctuations in the power lines can cause
inconsistencies in cooking. Advantium automati-
cally measures line voltage at the start of each
speedcooking selection and adjusts the cook-
ing time to achieve consistent quality results.
Line voltage is monitored by the voltage com-
pensation transformer, which is located on the
smart board. This transformer monitors the volt-
age from L2 to neutral.
SMART BOARD
CN5
Voltage Compensation Circuit
The optimal line voltage where no voltage com-
pensation occurs, is 120 VAC. Above 120VAC
time is subtracted to the recipe. Below 120 VAC
time is added. The amount of voltage compen-
sation required is dependent upon the incoming
voltage at the start of the cooking cycle, and the
particular speedcooking selection that is chosen.
The chart below shows the predicted compen-
sation times based on a 5 minute speedcook
selection (such as: Biscuits, Refr; Large; 8 bis-
cuits).
VOLTAGE
L2 to N
108
110
112
114
116
118
120
122
124
126
128
130
132
Predicted Compensation Times Based
on a 5:00 Speedcook Selection (such
as: Biscuits, Refr; Large; 8 biscuits)
TIME (secs)
COMPENSATION
60.0
47.9
36.7
26.3
16.7
7.9
0.0
-7.1
-13.3
-18.8
-23.3
-27.1
-30.0
Voltage compensation occurs after approximately
5 seconds of cooking operation. The display will
show "OPTIMIZING COOK TIME". The time will
flash and then display the new adjusted time,
base on the amount of voltage compensation
required.
OPTIMIZING COOK TIME
9:55
OVEN LOCKED
Voltage compensation only occurs during
speedcook operation and only occurs once dur-
ing the cooking cycle (at initial start of speedcook
operation).
UPPER HALOGEN LAMP BALANCE
As stated previously, the upper halogen lamp pair
operate together at the same power level. How-
ever, in order to provide even (balanced) cook-
ing performance, the upper rear halogen lamp
will always cycle at 85% of the upper front halo-
gen lamp. In other words, if the upper halogen
lamps are set at power level 10 (U=10) you would
expect both elements to operate at 100% of each
32 second duty cycle. Instead, the upper rear
halogen will cycle at 85% of power level 10, or
85% of 32 seconds. You will always notice the
upper rear halogen lamp will cycle off just prior
to the upper front.
THERMAL COMPENSATION
When cooking several food items consecutively,
the temperature in the oven's interior can become
very hot. The Advantium speedcooking program
(smart board) automatically compensates for the
increased temperature by adjusting the cooking
power levels of the upper and/or lower halogen
lamps. This innovative technology gives you
oven-quality food with consistent results.
Located inside of the oven cavity (upper right rear)
is a thermistor. At the start of each new
speedcooking operation (just prior to voltage
compensation occurring), the cavity thermistor
reads the oven cavity temperature. Depending
– 25 –
SELECT REM NITE MUTE TIMER