KROHNE IFC 090 Converter EN - Manual (Page 54)

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7.4 Faults and symptoms during start-up and process flow measurement
Before contacting Krohne Service, please read through the
following tables. THANK YOU !
• Most faults and symptoms occuring with the flowmeters can be eliminated
with the aid of the following tables.
• For greater clarity, faults and symptoms in the tables are divided into 2 parts and
various groups.
• Part 1 Signal converter IFC 090 B (B = basic version), without display
and without HHT or CONFIG user program (see Sect. 6.2)
Groups:
LED LED display (status messages)
I Current output
P Pulse output
LED / I / P LED display, current output and pulse output
• Part 2 Signal converter IFC 090 D (D = display version) and
Signal converter IFC 090 B (B = basic version), without display
but with CONFIG user program (see Sect. 6.2)
Groups:
D Display
I Current output
P Pulse output
S Status indication output
C Control input
D / I / P / S LED display, current output, pulse output,
status output and display
Part 1 Converter IFC 090 B (B = basic version), without display
and without HHT or CONFIG operator program
Group LED Fault / Symptom Cause Remedial action
LED 1 LED flashes red/green Overranging of A/D converter, Reduce flowrate; if unsuccessful,
current or pulse output test as described in Sect. 7.5.
Measuring tube drained, Fill measuring tube.
A/D converter overranged.
LED 2 LED flashes red Fatal Error, hardware and/or Replace signal converter
software error (see Sect. 8.7) or contact
Krohne Service.
LED 3 cyclic flashing of red LED, Hardware fault, Watchdog Replace signal converter
approx 1 second activated. (see Sect. 8.7) or contact
Krohne Service.
LED 4 LED shows red continuously Hardware fault Replace signal converter
(see Sect. 8.7) or contact
Krohne Service.
Group I Fault / Symptom Cause Remedial action
I 1 Receiver instrument Connection/polarity incorrect. Connect properly as described
indicates “0”. in Sect. 2.3 + 2.7
Receiver instrument Check connecting cables and
defective. receiver instrument, and
replace if necessary.
Short between current output Check connections and
and pulse output cables, see Sect. 2.3 + 2.7,
voltage between I+ and
I
⊥
approx. 15 V. Switch off
device, eliminate short-circuit,
switch device on.
Current output defective Replace signal converter
(see Sect. 8.7) or contact
Krohne Service.
I 2 22 mA present at current Current output I overranged Check device parameters
output (fault current) and change if necessary,
see Sect. 6.2, or contact
Krohne Service