27
Operating Instructions
bar-positurn2 and bar-positrol
English
Faults and their Correction:
Description
Possible Cause
Correction
Actuator does not move.
1. Air supply not correctly
connected
2. Solenoid valves not
correctly connected
3. Control air inside ac-
tuator cannot escape;
throttles closed too
much
1. Check air pressure and
supply line
2. Check valve connections.
3. Open throttles
End position not indicated
Faulty initialisation of the
unit
Initialise anew
Actuator moves to the
wrong end position for
safety position (just PN2-S
and PL-S)
Solenoid valve block
wrongly mounted.
Loosen solenoid valve block,
rotate 180° clockwise and re-
tighten. Re-wire the coils.
Unit oscillates around the
set intermediate position.
Too-high actuating speed.
Throttle-back actuating speed.
Actuator reaches travel
stop but valve stays in
switch position and keeps
venting.
Casing not mounted
correctly leads to faulty
initialisation of the unit.
Check if pinion or shaft of the
actuator have to much play to
each other and initialise anew.
