^ĞĐƚŝŽŶϭϬ͗ dƌŽƵďůĞƐŚŽŽƚŝŶŐ
:ƵůϮϬϭϲ
/ŶƐƚĂůůĂƚŝŽŶ͕KƉĞƌĂƚŝŽŶĂŶĚDĂŝŶƚĞŶĂŶĐĞ DĂŶƵĂů
d>͘ϯϭ͘ϮϭϬͲ/KD͘E
dƌŽƵďůĞƐŚŽŽƚŝŶŐ
ϯϵ
Section 10: Troubleshooting
ϭϬ͘ϭ
Mechanical Problems
Problem
Possible error
Solution
Where to find
Feedback position
and actual position
are not the same.
Actuator and valve are
mounted 90° rotated
in relation to each
other.
Remove actuator from
valve. Check assembly code
of actuator. Put both valve
and actuator in “Closed”
position. Mount actuator
on valve.
Section 4
Valve does not reach
the completely
“Closed” or “Open”
position.
Limit stop screws are
not set correctly.
Readjust the limit
stop screws.
Section 5
Insert is not
mounted properly.
Mount the insert in the
right position. Remark:
Rotate insert to one cam =
22.5°.
Section 4.5
Pressure to low.
Apply pressure as per sizing.
Sizing is wrong.
Check valve torque data
with actuator torque data.
Pinion is mounted in
the wrong position.
Re assemble actuator.
Section 9
Actuator rotates, valve
does not.
No coupling between
actuator shaft and
valve spindle.
Install a coupling
between actuator shaft
and valve spindle.
Section 4.5
Actuator does not
rotate or does not rotate
smoothly.
Broken gearing on
pistons or pinion.
Contact nearest PROVAL
representative to replace
actuator.
Spring or Spring
cartridge is broken.
Contact nearest PROVAL
representative to replace
actuator.
Appendix A.
Limit stop screws
cannot be turned out
anymore.
Limit stop screws
is bend.
Contact nearest PROVAL
representative to replace
actuator.
