Flowserve PMV P3 Instrukcja Użytkownika Pobierz pdf (Strona 19)

19

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 positioning.

Action

• Check air supply pressure and connection

between positioner and actuator.

• Check input signal to positioner.

• Check output signal from I/P converter.

• Check mounting and connections of po-

sitioner and actuator.

• Check function of diaphragm block.

• Check input signal.

• Check mounting and connections of po-

sitioner and actuator.

• 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.

• Defect or leaking diaphragm block.

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