Endress+Hauser Nivotester FTL375P, Manual

Page: 41 / 48

Hauser 41
Fault Reason Remedy
Does not switch No power
(green LED does not light up) Check power
Electronic defect Replace FTL 375 P
Contacts welded together
(after short-circuit) Replace FTL 375 P;
connect a fuse into contactor
circuit
Measuring transmitter
defective Replace measuring transmitter
Switches
incorrectly Incorrect setting of hook switch
for limit signal Set hook switch to correct
setting on pcb (p. 15…19)
Permanent
alarm signal Interrupt or short-circuit line to
measuring transmitter Check line
Measuring transmitter
electronics defective Replace measuring transmitter
electronics
Fail-safe measuring transmitter
FDL 60/61
connected to FEL 67 Check measuring transmitter
and replace if necessary
Switches
incorrectly after
power failure FEL 57,
Behaviour during switch-on
test (functional test) Observe switching behaviour
of FEL 57;
after a power failure block
the system control for up to
about 45 s
Trouble-shooting