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