Thermador C271 Service Manual - Broil Pre-Heat

Broil Pre-Heat

Broil Mode

Sequence Of Events:

1)

K4, K9 relays close.

2)

K4  relay energizes both cooling motors; airflow from cooling motor

closes the “air switch” contacts, the completed “air switch” circuit signals

the board (signal voltage). Note: if the air switch circuit is not completed

within 40 seconds, the board will interpret an cooling fan fault and

display an F34 error code for the upper oven, and an F64 error code for the

lower oven.

3)

Pin header P14 on the relay board sends 24 VDC to the double line break

relay (DLB) coil, when the coil is energized, the DLB contacts close.

Current flows from L1 to one leg of the bake, broil, and convection

element.

4)

Broil relay K9 closes and send current from L2 to the other leg of the broil

element. The broil element is on for 60 seconds during each 1-minute

cycle.

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