KROHNE OPTIMASS with MFC 300 EN - Manual (Page 139)

139
Display Messages Description Possible causes, remedial action
Fatal Error Fault in Electronics Replace Electronics
Wiring Error Fault in wiring (in remote sensors) Check wiring and rectify
Interface Board
defective
Ex-fuse burnt out in electronics Replace electronics
Hardware settings
Set hardware parameters do not match
the identified hardware.
Dialogue appears in the display.
Answer queries in dialogue mode and fol-
low directions.
Hardware identifica-
tion
Existing hardware cannot be identified.
There are either defects or unknown
modules.
Replace electronic unit
RAM/ROM error IO1 A RAM or ROM error is detected during
the CRC check.
Defective, replace electronic unit or I/O
module
RAM/ROM error IO2
Status: F _ _ _ _
See texts below) Application-sensitive fault, device is OK,
but measured values are affected Application test or operator action neces-
sary !
Application error
Application fault, device OK.
Use measured values with caution
Group message, when errors as below or
other application errors occur.
Overflow
Mass flow is greater than max flow
rate.
Accuracy is not guaranteed!
Reduce flow rate.
Increase meter size
Underflow
Mass flow is less than min flow rate.
Accuracy is not guaranteed!
Increase flow rate
Decrease meter size
Open circuit A Load of current output A too high Current not correct,
mA output cable has open circuit or load
too high.
Check cable, reduce load (should be F1000
Ohm)!
Open circuit B Load of current output B too high
Open circuit C Load of current output C too high
Over range A
Measured value at terminals A limited
by filter setting
Check with Fct. C 3.1 Hardware or sticker
in terminal compartment, which output is
connected to the terminal.
If current output: - Extend Fct. C 3.x.6
Measuring Range and Fct. C 3.x.8
Limitation
If frrequency output:- Extend values under
Fct. C 3.x.5 and Fct. C 3.x.7.
Over range B
Measured value at terminals B limited
by filter setting
Over range C
Measured value at terminals C limited
by filter setting
Over range D
Measured value at terminals D limited
by filter setting
Wiring A/B Wiring Error Check Connections at terminals A/B
Stop Mode Meter is in Stop Mode Check Fct A7.
Tube not oscillating Meter may be in Start-Up phase
Check process conditions (air)
Check meter settings C1.7.1 to C1.7.3
Check sensor resistances
System Control
System Control is Active. Mass flow is
not measured
Check Process Control settings C1.4.1 to
C1.4.4
Check Control Input C3.x.y