Error codes
21/26
10
Error codes
The meter continuously runs a self-diagnosis and can thus recognize and dis-
play various installation or error messages.
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
code
Error
Service guidelines
FL
neG
Incorrect flow direction
Check flow or installation direction;
correct if necessary
if necessary in exchange with:
DIFF
nEG
Negative temperature dif-
ference
Check installation point of the tem-
perature sensors; exchange if nec-
essary
if necessary in exchange with:
F0
No flow can be measured
Air in the measurement unit/pipe;
bleed air from line (delivery condi-
tion)
F1
Interruption in the hot side
temperature sensor
Inform service department
F2
Interruption in the cold side
temperature sensor
Inform service department
F3
Electronics for temperature
evaluation defective
Inform service department
F4
Problem with the power
supply; Battery flat
Inform service department
F5
Short-circuit hot side tem-
perature sensor
Inform service department
F6
Short-circuit cold side tem-
perature sensor
Inform service department
F7
Fault in internal memory
holding
Inform service department
F8
Errors F1, F2, F3, F5 or F6
for longer than 8 hours,
recognition of attempts to
manipulate. No further
measurements are carried
out.
Measure dependent on error code.
Error message F8 must be reset by
service department.
F9
Fault in the electronics
Inform service department
