Thermador SMW 272 B, Service Manual, Page: 75 / 84

Page 73
SMW O ven Service Manual Lower O ven Section
The test mode is designed to allow quick testing of
the control inputs and outputs.
The test mode is accessed by holding the STO P
TIME key down at power up or by holding the STO P
TIME key for 10 seconds within 5 minutes of power
up, provided no other key is pushed prior to STO P
TIME. The control will immediately enter the test
mode. W hen keys are released, all display digits will
display “-” to indicate that the test mode is active.
The following will occur when a button is pressed:
KEY PRESSED ACT IO N
Bake Keys
Broil Keys
Corresponding bake relay closes (bake element turns on).
Corresponding broil and convection relays close (broil and convection elements turn on).
N ote: The total current drawn by the broil and convection elements may exceed the
rating of the power supply circuit breaker, which will cause the circuit breaker to trip
open.
Corresponding convection fan relay closes (convection fan turns on).
N o action.
O ven light and cooling fan relays close (oven lights and cooling fans turn on).
If the upper oven element supervisor is not active, a four digit EEPRO M CRC checksum
is displayed in the blue digits. If the CRC is incorrect, 4 F’s will be displayed. The oven
temperature for each oven is displayed in the appropriate red digits.
If the upper oven element supervisor is active, all the display segments are lit.
If the lower oven element supervisor is not active, a four digit EEPRO M CRC checksum
is displayed in the blue digits. If the CRC is incorrect, 4 F’s will be displayed. The oven
temperature for each oven is displayed in the appropriate red digits.
If the lower oven element supervisor is active, all the display segments are lit.
Corresponding door latch status number indication shown in the blue digits.
D isplay Unlock Switch Lock Switch D oor Switch Latch Status
7 closed closed closed invalid
6 open closed closed latched
5 closed open closed unlatched, door
closed
4 open open closed in transition
3 closed closed open invalid
2 open closed open invalid
1 closed open open unlatched, door
open
0 open open open invalid
Convection
Keys
Convection
Roast Keys
Oven light
T imer 1
T imer 2
Clean Keys
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