Bake Cooking Control - Panasonic NN-CS597S APH Service Manual

4.5.

Bake cooking control

The digital programmer circuit controls the ON-OFF time of the
heater in order to control oven cavity temperature.
1. After selecting desired oven cavity temperature of Bake (the
range of selected oven temp is 200°F(93°C)-450°F(230°C)
and pressing [Start] button, a high level signal comes out of
the micro computer and applies to power relay (RY5).
2. When RY5 is switched to ON, power source voltage is
applied to the bake heater, and the heater turn on.
3. The digital programmer circuit senses the oven cavity
temperature through oven temp sensor (thermistor). When
the oven temperature reaches the set temperature, DPC
stops supplying high level signal to the power relay, and the
bake heater turn off.
4. After the bake heater turn off, the oven temperature will
continue increasing for a while and then decrease as shown
in Figure below.
When the oven temperature drops below the set
temperature, the digital programmer circuit senses the
signal and starts supplying a high level signal to RY5 again.
NOTE:
If only bake heater works, bake fan motor would rotate
for 5 minute after cooking to cool oven and electric
components.
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NN-CS597S