KROHNE IFC 090 Converter EN - Manual (Page 55)

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Part 1 Converter IFC 090 B (B = basic version), without display
(cont’d) and without HHT or CONFIG operator program
Group I Fault / Symptom Cause Remedial action
I 3 22 mA present at current Fatal Error Replace signal converter
output (fault current) (see Sect. 8.7) or contact
and red LED shows. Krohne Service
I 4 Unsteady display Electrical conductivity of Increase time constant
product too low (see Sect. 6.2) or contact
Krohne Service
I 5 Receiver instruments Control input C set to Change setting
indicate “constant value” “hold outputs” (see Sect. 6.2) or contact
Krohne Service
I 6 “Skipping” elec. Current output set to Change hysteresis or range
current values “automatic range change” of tripping points,
see Sect. 6.2 or contact
Krohne Service
Control input C set to Switch off or check level
“external range change” see Sect. 6.2 or
contact Krohne Service
I 7 F/R flow measurement: Different ranges set for Change setting, see Sect. 6.2
different displays even “forward and reverse flow” or contact Krohne Service
though same volume flow
rate in both directions
I 8 Receiver instruments Control input C set to Change setting,
indicate “min. values” “set outputs to zero” see Sect. 6.2 or contact
Krohne Service
Group P Fault / Symptom Cause Remedial action
P 1 Connected totalizer not Connection/polarity incorrect Connect properly as described
counting any pulses in Sect. 2.4 + 2.7.
Totalizer or external Check connection cables,
voltage source defective totalizer and external voltage
source, and replace if necessary.
Current output is external Check connection and cables
voltage source; short-circuit, (see Sect. 2.4 + 2.7), voltage
or current/pulse output between I+ and I ⊥ approx. 15 V.
defective. Switch off device. Eliminate
short-circuit and switch device
on again. If no function then
current or pulse output
defective. Replace signal
converter (see Sect. 8.7) or
contact Krohne Service.
Control input C Change setting,
is set to “hold outputs” see Sect. 6.2 or contact
Krohne Service
Pulse output inactive, Switch on, see Sect. 6.2, or
see Fct. 1.06.
Fatal Error, red LED shows. Replace signal converter
(see Sect. 8.7) or contact
Krohne Service.
Output B1 set to Change setting,
status output or see Sect. 6.2 or contact
control input Krohne Service
Control input C is set to Change setting,
“set outputs to zero” see Sect. 6.2 or contact
and currently active Krohne Service
P 2 Unsteady pulse rate Electrical conductivity of Increase time constant, see
product too low. Sect. 6.2 or contact Krohne
Service.
Group LED / I / P Fault / Symptom Cause Remedial action
LED / I / P 1 Red LED flashes, current output Fatal Error, hardware fault Replace signal converter
indicates fault current and pulse and/or software error (see Sect. 8.7) or contact
output “0”. Krohne Service.