IFC 110 F V2.0 IFC 110 F-EEx V2.0 - Krohne

Sect. 7.5 Part C Special applications, functional checks, service, and order numbersGroup P Faults / Symptoms Cause Remedial actionP 1 Totalizer connected Wrong connection/polarity Connect properly, seebut does not count pulsesSect. 2.3 and 2.6, noterecommended resistances !These causes only applyto the 2nd pulse output P2,terminal A1 !Totalizer or exernal voltagesource defectiveCheck connections, totalizerand external voltage sourceand 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 lotsmaller, switch off the instrument,eliminate the short circuitand replace fuses F1 and F8 onthe I/O PCB if necessary. Switchthe instrument back on. If it stilldoes not operate, pulse outputis defective. Replace I/O PCB orcomplete electronic unit,see Sect. 8.3 and/or 8.4.Pulse output switched off orwrong flow direction settingFatal Error, red LED is onSwitch on pulse output andchange flow, see Sect. 5.8 and5.13, Fct. 1.06 (P), 1.07 (A1)and 3.02.Replace signal converter orconsult KROHNE Service,having first noted downhardware information and errorstatus, see Sect. 7.3, Fct. 2.02.Control input C1 or C2 is set Change settings, seeto ”Zero outputs” and is Sect. 5.10, Fct. 1.11 and 1.12activatedor deactivate control input.Terminals A1 and A^ are not Switch on in Fct. 3.07 and setdefined as a 2nd pulse output in Fct. 1.07.Resistance of totalizer too lowfor DC operation, I > 100 mARe-position jumper X4 onI/O PCB to suit DC operation,see Sect. 6.3.P 2 Constant output of Control input C1 or C2 is set Change setting, seetotalizer pulses to ”Hold outputs” and is Sect. 5.10, Fct. 1.11 and 1.12activatedor deactivate control input.P 3 Unsteady pulse rate Electrical conductivity of Increase time constantprocess liquid is too low (see Sect. 6.5-6.8) orconsult KROHNE Service.P 4 Pulse rate too high or too low Incorrect pulse output settings Correct settings inFct. 1.06 (P) or 1.07 (A1).74 IFC 110 F 05/2003