Thermador C271 Service Manual - Convection Pre-Heat Mode

Convection Pre-Heat Mode

Convection Mode

Sequence of events:

1)

K4, K10, K11 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)

K11 relay closes and activates the convection motor. Note: the convection

motor will stop when the oven door is opened during any convection

mode.

4)

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

5)

Convection relay K10 closes and sends current from L2 to the other leg of

the convection element. The convection element is on for 60 seconds

during each 1-minute cycle.

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