The control unit monitors the filling level of the tank and outputs
messages (refer to chapter 9).
If the value falls below the set lower alarm value, the device warns
visually by means of an Alarm LED. The solenoid valve is activated
and the voltage-free alarm contact opens.
After exceeding the upper alarm value, the solenoid valve and the
voltage-free limit contact close again.
If the measuring signal of the pressure transducer falls below 3 mA,
E.EE is indicated in the display – the Alarm LED lights up, the sole-
noid valve closes (is de-energised) the voltage-free contact opens.
7.1 Operation of the control unit
Upon connection of the transformer to the power supply, all digits
and LEDs are switched on briefly. The device then switches to
standard mode:
● In the basic display, the measured filling height is shown in
cm.
● The programmable contacts are closed depending on the fill-
ing level.
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