Siemens SIPART PS2 6DR50xx Manual page 137

Fault indication
(symptoms)
SIPART PS2 stops during
•
"RUN 1".
SIPART PS2 stops during
•
"RUN 2".
SIPART PS2 stops during
•
"RUN 3".
SIPART PS2 stops during
•
"RUN 5"and does not reach
"FINISH" (delay time:
> 5 min).
Table 5
Fault indication
(symptoms)
For SIPART PS2, "CPU
•
test" flashes in the display
(approx. every 2 sec).
Piezo valve(s) do(es) not
•
switch.
In manual or automatic
•
mode, the actuator cannot
be moved or only in one
direction.
Piezo valve(s) do(es) not
•
switch (no quiet "clicking"
can be heard when the + or
– button is pressed in button is pressed in
manual mode).
Table 6
SIPART PS2 Manual
A5E00074631--06
possible cause(s)
Initialization started from end
•
position and
reaction time of max. 1 min.
•
not waited for.
Mains pressure not connected
•
or insufficient.
Transmission ratio selector and
•
parameter 2 (YAGL) as well as
actual stroke do not match.
Stroke not correctly set for
•
lever.
Piezo valve(s) do(es) not
•
switch (see table 6).
Actuating time too high.
•
"Batches" (play) in the
•
positioner -- actuator -- control
valve system
possible cause(s)
Water in the pneumatic block
•
(due to wet compressed air)
Moisture in the pneumatic
•
block
Screw between shrouding
•
cover and pneumatic block not
tightened firmly or cover
jammed.
Dirt (chips, particles) in the
•
pneumatic block
Deposits on contact(s)
•
between electronics board and
pneumatic block can develop
due to abrasion as a result of
continuous high vibration
stress.
Operation
Remedies
Up to 1 min. delay time
•
required.
Do not start initialization from
•
end position.
Secure the mains pressure.
•
Check settings:
•
see leaflet: figure "device view
•
(7)" as well as parameters 2
and 3
Check stroke setting at lever.
•
see table 2
•
Open reactor completely
•
and/or set PZ pressure (1) to
maximum permissible value.
If necessary, use booster.
•
Part-turn actuator:
•
Check if set screw of the
coupling wheel is inserted
firmly
Linear actuator:
•
Check if lever is connected
firmly to positioning shaft.
Eliminate any other play
•
between actuator and control
valve.
Remedies
At an early stage, this fault can
•
be eliminated by subsequent
operation with dry air (if ne-
cessary, in the temperature
cabinet at 50 to 70°C).
Otherwise: Repair
•
(see chapter 5, page 145)
Tighten screw, if necessary
•
eliminate jam.
Repair (see chapter 5,
•
page 145) or new device;
integrated fine screen,
also replace and clean.
Clean all contact surfaces with
•
spirit; if necessary, re-bend the
pneumatic block springs
slightly.
137