DeZurik PMV P36C Manuel - Page 17

Parcourez en ligne ou téléchargez le pdf Manuel pour {nom_de_la_catégorie} DeZurik PMV P36C. DeZurik PMV P36C 19 pages. For pneumatic actuators

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Troubleshooting

Condition

Signal change has no effect on

actuator position.

Signal change results in actuator

running to end position

Inaccurate Positioning

August 2012

PMV P36C and P41C Positioners

used with DeZURIK Pneumatic Actuators

Possible Cause

Indicator is loose.

Air supply is not adequate.

Input signal is fluctuating.

Diaphragm is damaged.

Pilot valve is dirty or worn.

Cam is incorrectly positioned.

Positioner is loose.

Cam is loose.

Input signal is fluctuating.

Pilot valve is dirty or worn.

Diaphragm is damaged.

Input signal is fluctuating.

Actuator is not sized correctly.

Valve torque is increased from

wear or damage.

Page 17

DeZURIK

Corrective Action

Check indicator and screw.

Re-position indicator and

tighten.

Check air supply to positioner,

and tubing to actuator.

Check input signal. Repair or

replace wiring.

Check diaphragm for damage or

leakage. Repair or replace

diaphragm.

Check pilot valve function. Clean

or replace pilot valve.

Check cam for correct setting.

Check coupling between

positioner and actuator.

Check cam position and locking

screw.

Check input signal. Repair or

replace wiring.

Check pilot valve function. Clean

or replace pilot valve.

Check diaphragm; repair or

replace diaphragm.

Check input signal. Repair or

replace wiring.

Check sizing. Replace with

correct actuator.

Rebuild or replace valve.

D10327