Hauser
35
Fault
Reason
Remedy
Does not switch
No power
Check power
Faulty signal line
Check signal line
Faulty electronic insert
Exchange
Strong build-up
Select suitable measuring range setting
(see Page 26-28)
FEW54: contacts welded together
(after short-circuit)
Exchange FEW54;
put fuse in contact circuit
Conductivity of liquid too low
Select different measuring principle
Switches
incorrectly
Min-/ Max- fail-safe mode set wrongly
Set correct mode at electronic insert
Sporadic faulty
switching
Thick heavy foam,
very turbulent conditions,
foaming liquid
Mount device in a bypass if necessary
Extreme radio interference
Screen connecting cable
Water in housing
Clean cover and cable gland and screw tight
FEW52: output overloaded
Reduce load, (cable) capacitance
en - Trouble-shooting