8-2
EB 8359-2 EN
Malfunction
Table 8-1:
Troubleshooting
Description of fault
Measures
Actuator moves too slowly.
Î
Check the supply pressure.
Î
Check the cross-section of the piping and
screw fittings.
Î
Check the configuration of the mounting parts.
Actuator moves in the wrong direction.
Î
Check piping.
Î
Check the configuration of the mounting parts.
Air leaks from the positioner.
Î
Check the seals in the connecting plate.
The set point span is not reached at a 100 % sig
-
nal.
Î
Check whether the correct range spring has
been selected.
Î
Check the adjusted air output and proportional
band.
Î
Check the adjusted span.
Zero is not reached at a 0 % signal.
Î
Check the adjusted zero.
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