Self-Clean Cycle - Thermador SMW 272 B Service Manual

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Lower O ven Section
N O TE: The Self-Clean cycle is a continuation of the Self-Clean Preheat cycle.
Press the SELF-CLEAN keypad and the following events will occur on the relay board:
L1
• The Relay connects L1 line voltage to the Bake and Broil Elements.
• Bake Relay
elements. N O TE: The Broil Element is on for 44-seconds, and draws 15-amperes during each 1-
minute cycle. The Bake Element is on for 15-seconds, and draws 11-amperes during each 1-minute
cycle.
• After Self-Clean Preheat, Relay K2 cycles off, via the thermostat. W hen the thermostat cycles back
on, (to maintain the 850˚F self-clean temperature), Relays K1 and K2 are alternately used to maintain
the self-clean temperature until its time has expired, at which point, the oven turns off.
L1
L2
K6
Cooling Fan
Relay
Cooling
Fan

Self-Clean Cycle

K1 K2
and Broil Relay
Air
N.O.
Switch
Stalled Fan
Relay Contacts
Stalled
Fan Relay
close and connect the L2 (120-volt) line to the Bake and Broil
High-Temp
Cutout
N.O.
K8
N.O.
L1 Relay
N.C.
N.O. = Normally Open Contacts
N.C. = Normally Closed Contacts
= Neutral Return
Page 81
SMW O ven Service Manual
K2
K1
N.O.
Broil
Bake
Relay
Relay
Bake
15 Seconds
11 Amps
N.O.
Broil
44 Seconds
15 Amps