Panasonic NN-A860WB, Service Manual

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Convection Cooking Duty Cycles
7.5. Combination Cooking
Combination cooking is achieved by operating the microwave and heater modes together
during one cooking cycle. There are three combination modes.
1. Combination (convection and microwave)
2. Combination (grill and microwave)
3. Combination (grill, convection and microwave)
The digital programmer circuit operators the power relays as shown in the figures below.
When the oven temperature reaches the predetermined temperature, the digital programmer
circuit stops supplying power to relay (RY5) resulting in the convection heater turning off.
During this time the digital programmer circuit continues to operate relay (RY1) so that
microwave activity continues at the duty cycle selected. The inverter control signal level is also
maintained. The microwave activity continues to cycle until the entire cooking program is
completed.
When the oven temperature drops below the selected temperature, the digital programmer
circuit operates power relay (RY5) switching on the heater elements.
In the case of grill combination the sequence applies with the digital programmer circuit
switching power relay (RY4) to control, the grill elements.
With convection, grill and micro power combination. The grill elements and convection
elements are operated alternatively whilst the oven temperature is above the selected level.
Convection And Microwave Combination Duty Cycles
Convection Heater Micropower
100 - 250 C
OUTPUT ON
OFF
440W 360W 66 0
250W 360W 48 18
100W 360W 21 45
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