Siemens SIPART PS2 6DR50xx Betriebsanleitung PDF herunterladen (Seite 195)

Alarm, error, and system messages

11.4 Fault correction

SIPART PS2 with and without HART communications

Operating Instructions, 09/2007, A5E00074631-07

195

11.4.3 Remedial measures table 2

Fault profile (symptoms) Possible cause(s) Remedial measures

• "CPU test" blinks on the digital

display approximately every two

seconds.

• Piezo valve does not activate.

• Water in the pneumatic block (due

to wet compressed air)

• In the manual and automatic

modes, the actuator cannot be

moved or can be moved only in one

direction.

• Moisture in the pneumatic block

• 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

• 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.

• Piezo valve does not activate (a

gentle click sound is not audible

when the "+" or "-" buttons are

pressed in the manual mode.)

• 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

More information is given under the also-see link.

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