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BD-S / BD-S-UL, ED-S / ED-S-UL, FD-S / FD-S-UL (E1) 10/2020 page 21/59
9.2.2 Alarm message and proceeding in case of an alarm
The status LED “Heating active” is lit.
• BD-S / BD-S-UL: Safety controller class 3.1
The safety controller keeps control of the chamber until the chamber temperature cools down below
the entered safety controller value. First the heating turns off. As soon as the inner chamber tempera-
ture has cooled down below the safety controller set-point, the heating is released and temperature
control is resumed by the controller.
If the safety controller class 3.1 has repeatedly taken over control, we recommend proceeding as fol-
lows:
• Disconnect the chamber from the power supply.
• Have an expert examine and rectify the cause of the fault.
• Restart the chamber
• ED-S / ED-S-UL, FD-S / FD-S-UL: Safety controller class 2
The heating turns off.
As soon as the inner chamber temperature has cooled down below the safety controller value, you
can reset the alarm message on the controller. Press the confirmation button. The heating is then
released and temperature control is resumed by the controller. The status LED “Heating active” is off.
If the safety controller class 2 has turned off the heating, we recommend proceeding as follows:
• Disconnect the chamber from the power supply.
• Have an expert examine and rectify the cause of the fault.
• Restart the chamber
• Reset the alarm message with the confirmation button
10. Timer function “Delayed Off”
The chambers offer the timer function “Delayed Off”.
This function serves to set a delay time until the control is turned off.
The selected timer run-time immediately starts running down.
When the timer expires, control deactivates (standby mode), heating and fan (with FD-S / FD-S-UL) turn
off. The lower display in Normal display shows “OFF”.
10.1 Setting the timer run-time
In Normal display press the arrow-down button to access the “tOFF” entry menu.
The current timer run-time [hh.mm] is displayed (upper display)
Press the confirmation button to activate the entry. The display “tOFF” flashes.
Set the desired timer run-time with the arrow buttons and confirm with the con-
firmation button.
Press the arrow-down button to return to Normal display.
or
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