23
8
Troubleshooting and error messages
8.1
Troubleshooting
Fault symptoms
Possible causes
Procedures
•
No reading / blank
display
•
No power supply
•
Check wiring, polarity
•
Electronic counter
defective
•
Replace complete device
•
Totalizer not running
•
No flow rate
indicated
•
Indicated quantity or
flow rate too small
•
Flow rate outside allowed
range (below Q
min
or above
Q
max
of meter)
•
Check flow rate (reverse flow) to-
talizer “0”
•
If too high, reduce flow or
install larger meter
•
If too low, increase flow or install
smaller meter
•
Reduce LFC to 0.1
•
Moving parts heavily worn out
due to continuous
overload
•
install new larger meter
•
Dirt trap / filter heavily soiled
•
Clean dirt trap, replace filter
•
Safety filter in meter intake
clogged
•
Replace safety filter
•
Install dirt trap / filter with
correct mesh size
•
Moving parts jammed
•
clean measuring chamber,
replace defective parts / meter
•
Totalizer(s) run back-
wards
•
Meter mounted in wrong di-
rection
•
Install meter with arrow pointing
in flow direction
•
Indicated quantity or
flow rate too high
•
Meter positioned wrongly (e.g.
at highest point)
•
Gas or air inclusion in fluid
•
Check and rectify operating con-
ditions and meter position
•
De-aerate pipes carefully
•
pressure drop at
meter too high
•
Dirt trap or filter heavily soiled
•
Clean dirt trap, replace filter
•
Flow meter’s safety filter heav-
ily soiled
•
Clean safety filter of flow meter
•
No signal
•
No communication
•
No pulse output
signal
•
No flow
•
Check flow using indication
•
Wrong parameterisation
•
Set correct parameters for out-
puts/communication
•
Polarity of communication
connection
•
Connect with correct polarity
•
Transducer defective
•
Replace transducer/no repair
