KROHNE VFM 5090 EN User Manual
Page 19
5.5 Error messages
5.5.1 Error messages in measurement mode
Error message
(display 2
nd
line)
Type Description
Corrective
action
required
INTL.ERR.nn
*
Internal error in converter
operation
Switch off the power and try again. If the problems
persists contact KHRONE MARSHALL service.
NO SIGNAL
N
No signal from the vortex
sensor
No flow through the primary or Vortex sensor
problem
CHECK INST
N
Vortex sensor signal quality
is bad
Check that 1. Flow rate > q min if OK. 2. Check for
excessive pipe vibration & proper installation.
LOW SIGNAL
N
Vortex signal amplitude too
low.
Check that 1. Flow rate > q min if OK contact
KHRONE MARSHALL Service.
HIGH SIGNAL
N Vortex sensor signal
amplitude too high
This occurs very rarely. Check 1. Flow rate < q max
if OK contact KHRONE MARSHALL Service.
LOW.FREQ.
N
Vortex frequency too low
Check 1. Flow rate > q min else call KHRONE
MARSHALL Service.
HIGH.FREQ.
N
Vortex frequency too high
check 1. Flow rate < q max else call KHRONE
MARSHALL Service.
LOW.FLOW
N Flow rate lower than
minimum flow rate q min.
Converter will continue to display actual flow rate.
However, accuracy of measurement may suffer. If
flow rate reduces further, then other errors such as
CHECK INSTALL,LOW SIGNAL will be generated
HIGH.FLOW
N
Actual flow rate higher than
q max.
Corrective action depends on application process. If
flow rate exceeds too much further it may damage
entire instrument physically !
LOW.TEMP. OPR
N
Operating temp. lower than
limit.
Corrective action depends on the process.
HIGH.TEMP.OPR
N
Operating temp. higher than
limit
Corrective action depends on the process.
LOW.PRES. OPR
N Operating pressure lower
than limit.
Take corrective action depending on the process.
HIGH.PRES. OPR
N
Operating pressure higher
than limit.
Corrective action is process dependent.
LOW.TEMP. PHY.
N
Operating temp. lower than
physical limit.
Take corrective action depending on the process.
HIGH.TEMP.PHY
F
Operating temp. higher than
physical limit.
Will cause damage to primary as well as signal
converter !
LOW.PRES.PHY.
N Operating pressure lower
than physical limit.
Take corrective action depending on process.
HI.PRES.PHY
F
Operating pressure higher
than physical limit.
Will cause damage to primary and signal converter!
T.SENS.SHORT
N
Temp. sensor / wires short
circuit.
T.SENS.OPEN
N
Temp. sensor open circuit.
P.SENS.OPEN
N Pressure sensor open
circuited
Indicates fault in temperature/pressure sensor.
Contact KHRONE MARSHALL Service. You may
use signal converter with temperature or pressure
compensation offline in the mean time till you get
the service. P&T values entered through menu are
used.
INV. CONFIG
F
Configuration data in non-
volatile memory is not valid.
Check entire configuration again. If error persists-
call for service
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