Parker PA Series Installation, Operating, & Maintenance Instructions

Page 30
Trouble Shooting
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
PROCEDURE
Display does not
illuminate after being
powered.
1. Incorrect voltage.
2. Electrical connectors are not fastened to positioner.
1. Confirm 24V DC power supply.
2. Tighten electrical connecters to the positioner.
Actuator does not move.
1. Pilot pressure is not present.
2. Pilot air supply is not connected to positioner
housing.
1. Check that pilot air supply is properly
connected.
2. Connect pilot air supply to positioner housing.
Valve does not fully
open.
1. Pilot air supply is less than required.
2. Air leakage at pneumatic connections.
1. Verify that pilot air supply meets the minimum
pressure required to actuate the specific angle
seat valve model number
. Refer to values on
actuator housing.
2. Tighten the pilot supply and actuator
connections on the positioner. Tighten actuator
connection on actuator housing.
Actuator does not move
right up to stop (at
20mA).
1. Pilot pressure is too low.
2. Positioner is not adjusted correctly.
1. Increase pilot supply to required value on
actuator housing.
2. Readjust position sensor.
In stationary automatic
operation (constant set
point signal) the
positioner internal
solenoid valves continue
to operate.
1. Leak in connection from positioner to actuator.
2. Leak in actuator.
1. Find leak and correct.
2. Consult factory.
Internal positioner
solenoid valves are not
operating.
1. Faulty solenoid valve connections (internal).
2. Contamination (particles) in the (internal) solenoid
valves.
1. Consult factory.
2. Consult factory.
Valve positions not
reached correctly.
1. Positioner is not adjusted correctly.
1. Run self-adjustment.
Positioner does not
reach setpoint
1. Value of LIM STROKE or DEAD BAND are too
small.
1. Adjust LIM STROKE and DEAD BAND values
until steady state is achieved.

Parker PA Series Specifications

General

Brand	Parker
Model	PA Series
Category	Control Unit
Language	English