Siemens SIPART Series - 10.4.3 Remedial measures table 2

Alarm, error, and system messages
10.4 Fault correction
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11
227
10.4.3
Remedial measures table 2
Fault profile (symptoms)
Possible cause(s)
Remedial measures
• "CPU testt" blinks on the display
approximately every 2 seconds.
• Piezo valve does not activate.
• Water in the pneumatic block (due
to wet compressed air)
• 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
• In the manual and automatic
modes, the actuator cannot be
moved or can be moved only in one
direction.
• Moisture in the pneumatic block
• Piezo valve does not activate (a
gentle click sound is not audible
when the "+" or "-" buttons are
pressed in the manual mode.)
• The screw between the shrouding
cover and the pneumatic block has
not been tightened firmly or the
cover got stuck.
• Tighten the screw firmly; if required,
rectify the deadlock.
• Dirt (swarf, particles) in the
pneumatic block
• Repair or a new device; clean
and/or replace the built-in fine
screens.
• 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.
• Clean all contact surfaces with
spirit; if required, bend the
pneumatic block contact springs.
Fault table 2
See also
Repair/Upgrading (Page 233)