Endress+Hauser Nivotester FTL325N-3 3 Serie Manual Del Usuario página 47

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
Wrong signal input
Switches Inverted measuring transmitter function Invert output signal on measuring
incorrectly
Incorrect setting of change-over switch
for limit signal in FTL325N
Permanent Switch connected as measuring trans-
alarm signal mitter without current limiting resistors
Interrupt or short-circuit line to measur-
ing transmitter
Measuring transmitter electronics
defective
No sensor connected
Endress+Hauser
en - Trouble-shooting
Remedy
Check power
Replace FTL325N
Replace FTL325N;
connect a fuse into contactor circuit
Replace measuring transmitter
Connect correct input
transmitter (e. g. set minimum/maxi-
mum safety circuit differently)
Correctly set change-over switch
behind front panel (p. 16, 23, 24...43)
Connect resistors or switch off alarm
signal (p. 8, 16, 25...43)
Check line
Replace measuring transmitter elec-
tronics
Switch off alarm signal for not used
channel (p. 16)
47