Insufficient Supply Air - Siemens SIPART PS2 Service Manual

Troubleshooting Procedures

3.14 Insufficient Supply Air

Fault Profile (symptoms)
Positioner remains in
"RUN 3"
Positioner remains in
"RUN 4"
Positioner remains in
"RUN5", does not go up
to "FINISH" (waiting
time> 7 min).
* Non-active zone is in the valve stroke, see NOINI (P-Manual Mode) Troubleshooting
(Page 58)
3.14 Insufficient Supply Air
Maximum air pressure ratings are displayed on the actuator's name plate/stamp. Using too
little air pressure will slow down the stroke times of the valve assembly. The PS2 positioner
can handle up to 100 psi as long as the recommended actuator pressure is not exceeded.
● Adjust supply pressure according to the application.
● If pressure adjustments are made, run initialization. See Initialization Procedure
(Page 50).
28
Possible Cause(s)
Actuator travel time is too high.
•
Air Leak (Page 16)
•
Non-active zone is in the valve
•
stroke*. Non-active zone is in the
valve stroke*, see Valve Block Fail-
ure (Page 38)
Air Leak (Page 16)
•
Booster(s) Not Properly Tuned
•
(Page 18)
Loose or Worn Linkage (Page 29)
•
Loose or Worn Linkage (Page 29)
•
Booster(s) Not Properly Tuned
•
(Page 18)
Air Leak (Page 16)
•
Corrective Measures
Open the restrictor com-
•
pletely and/or set the supply
air to the highest permissible
value see Insufficient Supply
Air (Page 28)
See Air Leak (Page 16)
•
See star notation below.
•
Use a booster if faster stroke
•
times are desired.
See Air Leak (Page 16)
•
See Booster(s) Not Properly
•
Tuned (Page 18)
See Loose or Worn Linkage
•
(Page 29)
Part-turn actuator: verify
•
coupling set screw is secure.
Linear actuator: verify lever
•
arm is secure to input shaft.
Correct any slack between
•
the actuator and valve.
Loose or Worn Linkage
•
(Page 29)
PS2 Troubleshooting Guide
Service Manual, 03/2017, A5E36661550-AA