BD / BF / ED / FD / FED (E3.1) 02/2022 page 39/116
7.4 Alarm message and proceeding in case of an alarm
The alarm icon flashes in the display. In case of the option audible alarm with activated buzzer (chap. 7.6)
the buzzer sounds.
• Safety controller class 2 (“temperature limiter”)
The alarm icon flashes in the display. In case of the option audible alarm with activated buzzer (chap.
7.6) the buzzer sounds.
The heating turns off.
Resetting the alarm:
With option audible alarm with activated buzzer: Mute the buzzer pressing the OK button.
As soon as the inner chamber temperature has cooled down below the safety controller set-point, the
alarm icon is lit permanently. You can reset the alarm message on the controller. To do this, reset the
alarm message in the safety controller menu with the OK button. The heating is released and tempera-
ture control is resumed by the controller.
• Safety controller class 3.1 (“temperature protection”)
The alarm icon flashes in the display. In case of the option audible alarm with activated buzzer (chap.
7.6) the buzzer sounds.
The heating turns off.
Resetting the alarm:
With option audible alarm with activated buzzer: Mute the buzzer pressing the OK button.
As soon as the inner chamber temperature has cooled down below the safety controller set-point, You
can reset the alarm message in the safety controller menu with the OK button, The heating is released
and temperature control is resumed by the controller.
Note:
When the safety controller class 2 or class 3.1 had been activated, you should disconnect the chamber
from the power supply and have an expert examine and rectify the cause of the fault.
7.5 Function check
Check the temperature safety device class 2 or class 3.1 at appropriate intervals for its functionality. It is
recommended that the authorized operating personnel should perform such a check, e.g., before starting
a longer work procedure
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