KROHNE IFC 110 Converter - Manual (Page 74)

Sect. 7.5 Part C Special applications, functional checks, service, and order numbers
74 IFC 110 F 05/2003
Group P Faults / Symptoms Cause Remedial action
P 1 Totalizer connected Wrong connection/polarity Connect properly, see
but does not count pulses Sect. 2.3 and 2.6, note
recommended resistances !
Totalizer or exernal voltage Check connections, totalizer
source defective and external voltage source
and replace if necessary.
Internal power supply (E+E-) Check connections and cables,
is voltage source, shorted or see Sect. 2.3 and 2.6.
defective pulse output Voltage between E+and E-
approx. 24 V. If voltage is a lot
smaller, switch off the instru-
ment, 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 Switch on pulse output and
wrong flow direction setting 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.
Control input C1 or C2 is set Change settings, see
to ”Zero outputs” and is Sect. 5.10, Fct. 1.11 and 1.12
activated or deactivate control input.
Terminals A1 and A^ are not Switch on in Fct. 3.07 and set
defined as a 2nd pulse output in Fct. 1.07.
Resistance of totalizer too low Re-position jumper X4 on
for DC operation, I > 100 mA I/O PCB to suit DC operation,
These causes only apply
to the 2nd pulse output P2,
terminal A1 !
see Sect. 6.3.
P 2 Constant output of Control input C1 or C2 is set Change setting, see
totalizer pulses to ”Hold outputs” and is Sect. 5.10, Fct. 1.11 and 1.12
activated or deactivate control input.
P 3 Unsteady pulse rate Electrical conductivity of Increase time constant
process liquid is too low (see Sect. 6.5-6.8) or
consult KROHNE Service.
P 4 Pulse rate too high or too low Incorrect pulse output settings Correct settings in
Fct. 1.06 (P) or 1.07 (A1).