Siemens SIPART PS2 series User Manual

11.4 Fault and remedy
Fault profile (symptoms) Possible cause(s) Remedy
Positioner remains in "RUN 1".
● Initialization started from the end po‐
sition
● The response time of a maximum of
1 minute was not observed
● Supply pressure PZ not connected
or supply pressure PZ too low.
● Compressed air line blocked, e.g.
solenoid valve
● A waiting time of up to 1 minute is
required
● Do not start initialization from the
end position.
● Ensure supply pressure PZ.
● Free up blocked lines
Positioner remains in "RUN 2".
● Transmission ratio selector and pa‐
rameter 2
● "YAGL" and the real stroke do not
match.
● Incorrectly set stroke on the lever
● The pneumatic block does not
switch.
● Check settings: Parameters 2 and 3
● Check the stroke setting on the lever
Positioner remains in "RUN 3".
● Actuator travel time is too high ● Open the restrictor completely
and/or set supply pressure PZ to the
highest permissible value.
● Use a booster if required.
Positioner remains in "RUN 5", does not
go to "FINISH" (waiting time > 5 min.).
● "Gap" (play) in the positioner - ac‐
tuator - control valve system
● Part-turn actuator: Check for firm
seating of set screw on coupling
wheel
● Linear actuator: Check for firm seat‐
ing of lever on positioner shaft.
● Correct any other play between the
actuator and the control valve.
● Diagnostic value "9.TUP" or
"10.TDOWN" < 1.5 s
● Set the traversing velocity to > 1.5 s
using the internal restrictor.
"CPU test" flashes on the local display
approximately every 2 seconds.
● Water in the pneumatic block (due to
wet compressed air)
● At an early stage, this fault can be
rectified with subsequent operation
using dry air, in a temperature cabi‐
net at 50 to 70 °C if required.
● Otherwise: Repair
The pneumatic block does not switch.
In the manual and automatic modes, the
actuator cannot be moved or can be
moved only in one direction.
● Moisture in the pneumatic block
Diagnostics and troubleshooting
11.4 Fault and remedy
SIPART PS2 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E00074631-AE 235

Siemens SIPART PS2 series Specifications

General

Brand	Siemens
Model	SIPART PS2 series
Category	Valve Positioners
Language	English