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Fault
Reason
Does not switch
No power
(green LED does not light up)
Electronic defect
Contacts welded together
(after short-circuit)
Measuring transmitter
defective
Switches
Incorrect setting of DIP switch
incorrectly
for limit signal
Permanent
Interrupt or short-circuit line to
alarm signal
measuring transmitter
Measuring transmitter
electronics defective
Endress+Hauser
Remedy
Check power
Replace FTL 375 N
Replace FTL 375 N;
connect a fuse into contactor
circuit
Replace measuring transmitter
Set DIP switch to correct
setting on pcb (page 15...19)
Check line
Replace measuring transmitter
electronics
e
Trouble-shooting
39
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