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KBF-S / KBF-S-UL (E6) 02/2019 page 38/91
With the Back button you can go back to the “Safety controller” submenu and, repeatedly pressing it, to
Normal display.
Regularly check the settings of the safety controller mode and value.
Set the safety controller value by approx. 2 °C to 5 °C above the desired temperature set-point.
10.2.3 Message and measures in the state of alarm
The state of alarm is indicated visually in Normal display. If the buzzer is enabled (chap. 13.2) there is an
additional audible alert. The heating turns off.. As soon as the inner chamber temperature has cooled
down below the safety controller value, the heating is released and temperature control continues.
In Normal display a text message indicates the alarm cause. The “collective alarm” icon is lit. If the audible
arm is activated, the buzzer sounds. Press the OK button to mute the buzzer.
The alarm message “Safety controller” and the “Collective alarm” icon are displayed on the controller until
you press the OK button on the controller and the inner chamber temperature has cooled down below
the safety controller value.
• If the inner chamber temperature has already cooled down below the safety controller value when
pressing the OK button, the alarm message “Safety controller” and the “Collective alarm” icon are re-
set together with the buzzer.
• If the state of alarm is still active when pressing the OK button, i.e. the inner chamber temperature is
still above the safety controller value, first only the buzzer is reset. The alarm message “Safety control-
ler” and the “Collective alarm” icon will disappear as soon as the inner chamber temperature falls be-
low the safety controller value.
The alarm remains active until it is acknowledged on the controller and the inner temperature falls below
the entered safety controller setpoint. Then the heating is released again.
Normal display showing safety controller alarm (sample values)
Safety controller
Note:
When the safety controller 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.
10.2.4 Function check
Check the safety controller at appropriate intervals for its functionality. It is recommended that the author-
ized operating personnel should perform such a check, e.g., before starting a longer work procedure.
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