GE Profile Performance ADVANTIUM SCA2000BAA Service Manual page 28

upon the oven cavity temperature and the amount
of cooking time selected, the smart board will
adjust the power level of the upper and/or the
lower halogen lamps to compensate for the ad-
ditional heat that may already exists in the oven
cavity (if previous cooking occurred).
Thermal compensation can affect the upper halo-
gen lamp power level, the lower halogen lamp
power level or both the upper and lower halogen
power levels simultaneously. Thermal compen-
sation can lower the upper halogen pair by 1, 2
or 3 power levels. The lower halogen lamp can
also be reduced by 1, 2 or 3 power levels, but
never independently of the top halogen lamp pair.
In other words, thermal compensation on the
lower lamps will never be greater than the com-
pensation occurring on the top lamps. It is pos-
sible however to have thermal compensation oc-
curring on the upper halogen lamp pair, but not
on the lower.
Neither the upper halogen lamp pair, or the lower
halogen lamp can be compensated below power
levels of 2. In other words, if a power level of 3 is
selected for either the upper halogen pair, or the
lower halogen lamp, then thermal compensation
can only reduce the power level by a maximum
of 1 power level.
Thermal compensation only occurs when oven
cavity temperatures are higher than normal from
the previous cooking operation. When thermal
compensation is required, it will occur immedi-
ately upon the start of a new speedcook opera-
tion (just prior to voltage compensation occur-
ring) and there will be no indication in the display
that thermal compensation has occurred. The
amount of thermal compensation (1, 2 or 3 power
OVEN CAVITY
THERMISTOR
– 26 –
levels) depends upon the temperature of the oven
cavity at the start of the speedcook operation and
the amount of time selected.
When thermal compensation occurs, it is not
possible to see the adjusted power levels in the
display. If you where to press the power level
pad during a speedcook operation, in which ther-
mal compensation occurred, you would not see
the adjusted power levels in the display. In fact,
what you would see is the original power level
setting. However, you can visually see compen-
sation occurring by carefully observing the cy-
cling of the halogen lamps.
CAUTION: when viewing the halogen lamps, do
not stare directly into the face of the door win-
dow. View the oven interior from a distance far
enough not to cause eye strain.
Thermal Compensation Test
To better understand this operation you can per-
form the following test (only if the oven cavity is
at room temperature). Remove the pan from the
oven so you can see both the upper and lower
halogen lamps. Select Speedcook, Meats, Ham-
burger, 1/2 inch thick, 1-2 patties. The following
will show in the display:
ADJUST TIME or START
3:00 U=10 L=10 M=10
OVEN LOCKED SELECT
Notice that the display shows power levels of 10
for each cooking component. During this test you
will be operating the oven with no load. For this
reason, it will be necessary to adjust the micro-
wave power level to zero (M=00). To do this,
press the power level button on the control panel.
Leave the upper and lower power levels at 10
(U=10 L=10), and adjust the microwave to zero
(M=00).
Press START to run
3:00 U=10 L=10 M=00
OVEN LOCKED SELECT
NOTE: Set Microwave to Zero (M=00)
REM NITE MUTE TIMER
REM NITE MUTE TIMER