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Troubleshooting
What to Do First
When a problem occurs, check the following first.
Mounting of FVP110 positioner:
❑ Is the linkage to the valve actuator correctly set up?
❑ Is the feedback lever correctly attached?
❑ Is the span of rotation angle of the position sensor against the valve stroke more than
the minimum requirement?
❑ Has auto tuning been performed after installation?
Air Piping:
❑ Are the air pipes correctly connected? Is there no leak of air?
❑ Is the air supply pressure high enough to drive the valve?
❑ Is the A/M selector on the positioner set to A (automatic)?
Wiring:
❑ Is the FVP110 positioner correctly connected to the fieldbus?
❑ Are the conductors incorrectly connected, in other words, is the plus side connected
to minus, and vice-versa?
❑ Has the power to the fieldbus been turned on? Is the terminal-to-terminal voltage
equal to or greater than 9 V?
❑ Is the terminator correctly installed?
❑ Is a host system connected to the fieldbus?
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