Flowserve APEX A9000 Accord - Manual (Page 34)

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13.3 APEX A9000 symptoms and solutions
Failure Probable Cause Corrective action
No LED is flashing. Current source below 3,6 mA .
Incorrect wiring polarity.
Verify current source supplies at
least 3,6 mA. Check wiring for
correct polarity.
Valve position reading
is not what is expected.
Stem position sensor mounting
is off 180 degrees.
Apex A9000 not calibrated.
Tight shutoff MPC (Minimum
position cutoff) is active.
Reposition sensor.
Calibrate Apex A9000.
No action.
Apex A9000 goes
in wrong direction. Change direction
(Section 10.4).
Apex A9000 is
oscillating. Decrese gain (Section 10.6).
Apex A9000 is
responding slow. Increse gain (Section 10.6).