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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.
