IFM Electronic Efector 160 LI2, Operating Instructions Manual

Page: 26 / 33

After mounting, wiring and setting 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:
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. For exam-
ple readjust or clean the unit.
Page 26
Function check
5 Installation and set-up / operation
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