Error Messages - Landis+Gyr ULTRACOLD T550 Technical Description

Error messages

11 Error messages
The meter continuously runs a self-diagnosis and can thus recognize and dis-
play various installation or meter 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
Errors F1, F2, F3, F5 or F6
for longer than 8 hours,
recognition of attempts to
F8
manipulate. No further
measurements 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 condi-
tion)
Check hot side temperature sensors;
replace if necessary
Check cold side temperature sen-
sors; replace if necessary
Exchange the meter
Check connection; Change battery
Check hot side temperature sensors;
replace if necessary
Check cold side temperature sen-
sors; replace if necessary
Exchange the meter
Measure dependent on error code.
Error message F8 must be reset by
service department.
Exchange the meter
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Service guidelines