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TROUBLESHOOTING GUIDE
Trouble
Possible Cause
Remedy
Actuator will not power up. No display.
a. No or low input power.
b. Unit wired incorrectly.
a. Verify input power is between 100 and 240 Vac.
b. Reference wiring diagram and ensure unit is wired
properly.
Unit will not respond to command input.
a. Command is wired to incorrect input.
b. Command signal is configured incorrectly.
c. Incorrect control mode is selected.
a. Ensure command is wired to appropriate input.
b. Ensure proper command signal is configured (mA or
Volts) through S1-S3.
c. Ensure the correct control mode is selected.
Unit will not stroke to desired location.
a. Incorrect command signal sent.
b. Calibration of actuator is incorrect.
c. Actuator is physically prevented from moving to desired
location.
a. Verify that the correct command signal is being sent.
b. Repeat calibration procedure to ensure proper
calibration.
c. Ensure there are no mechanical interferences within the
valve.
Actuator chatters in operation.
Approaching the maximum output thrust of the actuator.
Determine the cause of the excessive load and remove.
Actuator hunts in operation.
a. Command signal is oscillating.
b. Noise is present on command signal.
c. Process variable is driving changing actuator position.
a. Verify command signal is not oscillating. Determine
cause if present.
b. Verify proper shielding is present, check for noise on
command signal.
c. Monitor the process variable feedback to determine if it
is inducing the change.
Actuator delays before responding to a command change. CMD DAMP parameter is set to high.
Verify the CMD DAMP parameter is set correctly.
Relay signal not received at control.
a. Relay not configured to trip on desired event.
b. Wiring to relay is incorrect.
c. Unit is not in condition to trigger event.
a. Verify proper software event configuration.
b. Verify correct wiring.
c. Verify unit is in condition to trigger event.
Inputs not responding to discrete signals.
a. Input not configured to trip desired event.
b. Wiring to input is incorrect.
c. Input is not present.
a. Verify proper trigger event for input.
b. Verify unit is wired correctly.
c. Verify input is present.
Position transmitter is not functioning.
a. Loop/Internal power mode is incorrectly configured. S4
is incorrectly set.
b. Unit is wired incorrectly.
a. Verify proper power mode is configured through S4.
b. Reference wiring diagram and ensure unit is wired
properly.
