4. Installation and set-up / operation
After mounting and wiring check whether the unit operates correctly.
Empty and fill the tank and check whether the unit switches correctly
and whether the LED's correctly indicate the operations.
Display by LEDs:
Function check
The red LED indicates
no malfunction
of the unit, it indicates that the
internal sensor signal is near the switching threshold.
2 cases can be distinguished:
•
Normal operation/safe operation
The
red LED is lit temporarily
when the level of the medium
approaches the response level or falls below the response level.
•
Warning of possible malfunction
If the
red LED is lit continuously
, the operating conditions are no
longer optimum.
It is for example possible that build-up of dirt on the probe has
changed the switching level within the active zone.
You can take preventive measures to avoid a malfunction. Check
for example the installation height or clean the unit.
12
LED green lights
unit is ready for operation
LED yellow lights
the output has switched
LED’s yellow and
red flash quickly (2 Hz)
short circuit of the switching output
LED red lights
function check
LED red flashes quickly (2 Hz)
internal fault or unit damaged
