KROHNE TIDALFLUX IFM 4110 PF EN - Manual (Page 54)

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Group P Faults / Symptoms Cause Remedial action
Wrong connection / polarity Connect properly, see sect.
2.5.3 and 2.5.6, note
recommended resistances !
Totalizer or external voltage
source defective Check connections, totalizer and
external voltage source and
replace if necessary.
Internal power supply (E+ E-) is
voltage source, shorted or
defective pulse output Check connections and cables,
see sect. 2.5.3 and 2.5.6.
Voltage between E+ and E-
approx. 24 V. If voltage is a lot
smaller, switch off the
instrument, eliminate the short
circuit and replace fuses F1 and
F8 on the I/O PCB if necessary.
Switch the instrument back on.
If it still does not operate, pulse
output is defective. Replace I/O
PCB or complete electronic unit,
see sect. 8.3 and/or 8.4.
Pulse output switched off or
wrong flow direction setting Switch on pulse output and
change flow, see sect. 5.8 and
5.13, Fct. 1.06 (P), 1.07 (A1)
and 3.02.
Fatal error, red LED is on Replace signal converter or
consult Krohne Service, having
first noted down hardware
information and error status. see
sect. 7.3, Fct. 2.02
Totalizer connected but does
not count pulses
Control input C1 or C2 is set to
“Zero outputs” and is activated Change settings, see sect. 5.10,
Fct. 1.11 and 1.12 or deactivate
control input.
Terminals A1 and A
⊥
are not
defined as a 2nd pulse output
Switch on in Fct. 3.07 and set in
Fct. 1.07.
P1
These causes only apply to the
2nd pulse output P2, terminal
A1 ! Resistance of totalizer too low for
DC operation, I > 100 mA. Re-position jumper X4 on I/O
PCB to suit DC operation, see
sect. 6.3.
P2 Constant output of totalizer
pulses Control input C1 or C2 is set to
“Hold outputs” and is activated Change setting, see sect. 5.10,
Fct. 1.11 and 1.12 or deactivate
control input.
P3 Unsteady pulse rate Electrical conductivity of process
liquid is too low Increase time constant (see
Sect. 6.5-6.7) or consult Krohne
Service.
P4 Pulse rate too high or too low Incorrect pulse output settings Correct settings in Fct. 1.06 (P)
or 1.07 (A1).