Nordmann AT4 - Notes on Operation; Function of the Display and Operating Elements

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4.2 Notes on operation
4.2.1 Function of the display and operating elements
Display and control unit
Function: Conguration of the Nordmann AT4
Indication of operating parameters
Reset of maintenance counter
Performing diagnostic functions
red LED “Malfunction”
Function: The LED lights in case of a severe malfunction of
the unit (Error status). Further operation is not pos
sible any longer. The error message is shown in the
display, see chapter 7).
The LED ashes alternately with the green LED if
the external safety chain (e.g. ventilation interlock
has triggered) is open. As soon as the safety chain
is closed again, the indication disappears.
yellow LED “Maintenance”
Function: The LED lights if the steam cylinder must be re
placed.
green LED “Humidication”
Function: The LED lights if the unit produces steam.
The LED ashes alternately with the red LED if the
external safety chain (e.g. ventilation interlock has
triggered) is open. As soon as the safety chain is
closed again, the indication disappears.
Drain key
Function: Calls up the dialogue for the manual draining
Unit switch
Function: Switches the unit on and off. The switch is illumi
nated when the unit is on.