Trouble-Shooting - Endress+Hauser nivotester FTL 325 N Manual De Instrucciones

Fault Reason
Does not switch No power
(green LED does not light up)
Electronics are defective
Contacts welded together
(after short-circuit)
Measuring transmitter defective
Switches Inverted measuring transmitter
incorrectly function
Incorrect setting of change-over
switch for limit signal in FTL 325 N
Permanent Switch connected as measuring
alarm signal transmitter without current limiting
resistors
Interrupt or short-circuit line to
measuring transmitter
Measuring transmitter electronics
defective
Endress+Hauser
Remedy
Check power
Replace FTL 325 N
Replace FTL 325 N;
connect a fuse into contactor circuit
Replace measuring transmitter
Invert output signal on measuring
transmitter (e. g. set minimum/
maximum safety circuit differently)
Correctly set change-over switch
behind front panel (p. 16...19)
Connect resistors or switch off alarm
signal (p. 17, 19)
Check line
Replace measuring transmitter
electronics
en - Trouble-shooting
23