Flowserve PMV D3 Digital Positioner Bedienungsanleitung PDF herunterladen (Seite 47)

9. Trouble shooting

Fault symptom

Change in input signal to positioner does

not affect actuator position.

Change in input signal to positioner ma-

kes actuator move to its end position.

Inaccurate regulation.

Slow movements, unstable regulation.

Action

• Check air supply pressure, air

cleanliness, and connection between po-

sitioner and actuator.

• Check input signal to positioner.

• Check mounting and connections of po-

sitioner and actuator.

•Check input signal.

•Check mounting and connections of po-

sitioner and actuator.

• Implement auto-tuning. Check for any

leaks.

• Uneven air supply pressure.

• Uneven input signal.

• Wrong size of actuator being used.

• High friction in actuator/valve package.

• Excess play in actuator/valve package.

• Excess play in mounting of positioner

on actuator.

• Dirty/humid supply air.

• Implement auto-tuning.

• Adjust the pressure adjusting screws.

• Increase the deadband (Tuning menu).

• Adjust Performance (Calibrate menu).

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Flowserve PMV D3 Digital Positioner Bedienungsanleitung Seite 47