Error Codes - Ista ultego III smart plus Technical Description

Error codes

10 Error codes
The meter continuously runs a self-diagnosis and can thus recognize and dis-
play various installation or error messages.
Error
code
FL
Incorrect flow direction
nEG
DIFF Negative temperature dif-
nEG
ference
F0 No flow can be measured
Interruption in the hot side
F1
temperature sensor
Interruption in the cold side
F2
temperature sensor
Electronics for temperature
F3
evaluation defective
Problem with the power
F4
supply; Battery flat
Short-circuit hot side tem-
F5
perature sensor
Short-circuit cold side tem-
F6
perature sensor
Fault in internal memory
F7
holding
F1, F2, F3, F5 or F6 for
longer than 8 hours, recog-
F8 nition of attempts to manip-
ulate. No further measure-
ments are carried out.
F9 Fault in the electronics
Note: Reset the message F8 in the parameterization mode manual-
ly or with the service software. All other error messages are deleted
automatically once the error has been rectified.
Error
Check flow or installation direction;
correct if necessary
if necessary in exchange with:
Check installation point of the tem-
perature sensors; exchange if nec-
essary
if necessary in exchange with:
Air in the measurement unit/pipe;
bleed air from line
(delivery condition)
Inform service department
Inform service department
Inform service department
Inform service department
Inform service department
Inform service department
Inform service department
Measure dependent on error code.
Error message F8 must be reset by
service department.
Inform service department
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Service guidelines