PMV P-2000 - Troubleshooting; No Actuator Position Change; Actuator Runs to End Position; Inaccurate Positioning

– 11 – Manual
Signal change has no effect on the actuator position.
– Make sure the supply pressure is switched on.
– Signal wires are wrongly connected.
– The wiring between the terminal block and the printed circuit board on
the force coil is broken. Check resistance.
– Pipe connections between the PMV Positioner and the actuator is wrong.
– A wrong portion of the cam is being used.
With a small change in the control signal the actuator runs to the end po-
sition.
– Pipe connections between the PMV Positioner and the actuator is wrong.
Inaccurate positiomng
– Dirty valve body.
– Dirty restrictor or nozzle.
– Iron dust in the magnet gap.
– Defective diaphragms.
– The sizing of the actuator is incorrect. Output torque of the actuator is too
small or the supply pressure is too low.
– Torque requirement of the valve has increased.
Overshoot or hunting during positioning.
– Internal gain is too high.
– Capacity of the supply pipe is too small or air lter is clogged. In this
event the input pressure to the PMV Positioner drops steeply when
the pilot valve feeds air into the actuator.
Trouble Shooting