Nordmann es4 4, Installation And Operation Instructions Manual

Page: 43 / 68

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5 Operation
5.1 Function of the display and operating elements
Drain/Info key
– press key shortly : Opens and closes the drain valve (manual drain-
ing).
Note: the drain valve is automatically closed after 10 minutes.
– press key for a extended period of time (>3 sec.) : activating the
info mode
red LED “Error”
– in normal operating mode
– The LED lights in case of a malfunction of the unit. Further opera -
tion is no longer possible , the heating voltage is interrupted.
– The LED flashes alternately with the green LED if the external
safety chain (ventilation interlock, safety humidistat, etc.) is open.
– in info mode
LED flashes in intervals if a malfunction is present. The number of
“flashes” per interval indicates the left digit of the error code.
yellow LED “Warning and info indication”
– in normal operating mode
The LED lights if the cylinder maintenance is due (see chapter 6) or
the maintenance indication is not reset after the maintenance (see
chapter 6.6).
– in info mode
LED flashes in intervals if a malfunction is present. The number of
“flashes” per interval indicates the right digit of the error code.
green LED “Steam”
– in normal operating mode
– The LED lights if the unit produces steam.
– The LED flashes alternately with the red LED if the external safety
chain (ventilation interlock, safety humidistat, etc.) is open.
– in info mode
LED flashes in intervals. The number of “flashes” per interval multiplied
by 10 indicates the current steam output in %.
Unit switch
Switches the unit on and off. The switch is illuminated when the unit is
switched on.