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If faults C1 or F4 exist, the meter assembly must
be replaced.
7.
Errors
7.1 Checking the meter
Check the flow measurement values for plausi-
bility after installation and then at regular inter-
vals.
ƒ
Is a flow volume displayed?
ƒ
If a negative flow is displayed, check and correct the
direction of installation.
ƒ
Remove meter, by blowing into the meter check that
the impeller turns and that the top left "+" sign in the
display flashes (active flow) -> meter is OK (depend-
ent on the flow, it may take a minute before the "+"
sign reappears).
ƒ
Otherwise: replace the meter.
7.2 Troubleshooting
Before checking the meter itself for defects, check the
following points:
ƒ
Are the stop valves completely open?
ƒ
Is the pipe clear (where appropriate clean any dirt traps)?
ƒ
Is the meter rating correct?
ƒ
Is the direction arrow on the flow sensor in the flow
direction of the heating medium?
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