Siemens SIPART PS2 Service Manual page 32

Troubleshooting Procedures
3.15 Loose or Worn Linkage
● Flameproof enclosures on rotary actuators require the black-wheel coupler design, not
the SST coupler.
Figure 3-1
● Unscrew cap from PS2 enclosure.
● Locate the internal input shaft, see image below.
● Put PS2 in Manual mode- from Auto mode press
● Using the
● While the valve is moving back and forth inspect the movements of:
– For Rotary: Actuator shaft, Positioner coupling, Positioner input shaft, and Internal
– For Linear: Actuator shaft, Actuator stem coupling, Feedback pin, Feedback arm,
● All of these components must move in unison, all together.
– Several back and forth movements will be necessary to identify the loose component.
● If a mechanical component does not move together with the other components, secure
component with the supplied hardware, i. e. set-screw for rotary couplers.
● Re-initialize PS2 if any adjustments are made; see Initialization Procedure (Page 50).
30
FlameProof coupler and SST coupler
and/or buttons move the valve back and forth in both directions.
Star Linkage.
Positioner input shaft and Internal Star Linkage.
button once.
PS2 Troubleshooting Guide
Service Manual, 03/2017, A5E36661550-AA