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en -Trouble-shooting
26
Fault
Reason
Does not
No power
switch
(green LED does not light up)
Electronic defect
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 FTL325N
Permanent
Switch connected as measuring
alarm signal
transmitter without current
limiting resistors
Interrupt or short-circuit line to
measuring transmitter
Measuring transmitter electronics
defective
Nivotester defective
Remedy
Check power
Replace FTL325N
Replace FTL325N;
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, 17, 20...23 ff
Connect resistorsor switch off
alarmsignal, p. 7, 21, 23
Check line
Replace measuring transmitter
electronics
Replace FTL325N
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