Remedial Measures Table 2; Remedial Measures Table 3 - Siemens SIPART PS2 FF Compact Operating Instructions

C.3.3

Remedial measures table 2

Fault profile (symptoms)
● "CPU testt" blinks on the display
approximately every 2 seconds.
● Piezo valve does not activate.
● In the manual and automatic
modes, the actuator cannot be
moved or can be moved only in one
direction.
● Piezo valve does not activate (a
gentle click sound is not audible
when the "+" or "-" buttons are
pressed in the manual mode.)
Fault table 2
C.3.4

Remedial measures table 3

Fault profile (symptoms)
● Actuator does not move.
● Piezo valve does not activate (a
gentle click sound is however
audible when the "+" or "-" buttons
are pressed in the manual mode.)
● A piezo valve activates constantly in
the stationary automatic mode
(constant setpoint) and the manual
mode.
Fault table 3
Functional safety for SIPART PS2 FF
A5E00489774-02, 10/2013
Possible cause(s)
● Water in the pneumatic block (due
to wet compressed air)
● Moisture in the pneumatic block
● The screw between the shrouding
cover and the pneumatic block has
not been tightened firmly or the
cover got stuck.
● Dirt (swarf, particles) in the
pneumatic block
● Deposits on the contacts between
the electronic printed circuit board
and the pneumatic block may
develop due to abrasion owing to
continuous loads resulting from
strong vibrations.
Possible cause
● Compressed air < 1.4 bar
● Restrictor valve turned off (screw at
the right end stop)
● Dirt in the pneumatic block
● Pneumatic leakage in the positioner
- actuator system; start the leakage
test in "RUN 3" (initialization).
● Dirt in the pneumatic block, see
above
Remedial measures
● At an early stage, this fault can be
rectified with a subsequent
operating using dry air, if required,
in a temperature cabinet at 50 to
70°C.
● Otherwise: Repair
● Tighten the screw firmly; if required,
rectify the deadlock.
● Repair or a new device; clean
and/or replace the built-in fine
screens.
● Clean all contact surfaces with
spirit; if required, bend the
pneumatic block contact springs.
Remedial measures
● Set the supply air pressure to
> 1.4 bar.
● Open the restrictor screw by turning
it anticlockwise, see leaflet, "Device
view (6)".
● Repair or a new device; clean
and/or replace the built-in fine
screens.
● Rectify leakage in the actuator
and/or feed line.
● In case of an intact actuator and
tight feed line: Repair or new device
● See above
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