50
Biffi
ICON 2000
InstructIon and operatIng manual
12.6 the Manual oVerride cannot
Be enGaGed
In case the engagement of the lever is too
difficult, check whether the drive sleeve is stuck
and proceed as follows:
• Open the cover.
• Try to move the drive sleeve by a
screw-driver�
• Reassemble the cover.
12.7 the ValVe does not seat correctly
• If the valve is stopped by the torque limit in
closing, increase the actuator output torque
limit�
• If the valve is stopped by the position limit
in closing, check that the valve reaches its
seat position, then readjust the setting of the
position limit�
• The internal trim of the valve may be
damaged�
12.8 excessiVe torque for ValVe
operation
• Clean, lubricate and check the valve stem.
• Valve packing too tight: loosen the gland
bolt nuts�
• Coupling type “A”: tight fit between bush and
stem: increase the thread clearance on the
drive coupling�
• Coupling types “B1”, “B2”, “B3” and “B4”:
ensure there are no axial forces on the valve
stem by leaving an adequate axial clearance
between the stem and the drive bush� Also
check that all transmission shafts, universal
joints or bulkhead passages have sufficient
lubrication and check that the transmission
shafts are not bent�
• Check that the internal valve trim or the
reducer gears are well lubricated and not
damaged�
• Check the alphanumeric display for
diagnostic messages, and proceed with the
suitable corrective actions as described in
this chapter, paragraph 12�11, Diagnostic
messages�
12.9 the actuator does not stop in
fully open or fully closed position
• Check that the actual open and close
positions of the valve respectively correspond
to 100% and 0% on the actuator display
• Make sure that the torque and travel limits
are correctly set (see paragraph 9�1, Set-up
routines - Actuator set-up)�
12.10 the nuMeric position display
indicates “e01”
• It is necessary to re-calibrate the stroke
limits (see paragraph 9�1, Set-up routines -
Actuator set-up)�
12.5 the Motor runs But the actuator
does not MoVe the ValVe
In case the local display does not change the valve
position indicators:
• Check that the manual de-clutch lever is not
stuck in manual operation position�
• Rotate the handwheel a few degrees to
remove all possible sticking between the
handwheel and the drive sleeve�
In case the local display changes the valve
position indicators:
• Verify the stem nut correctly fits in the
actuator base�
• Verify the stem nut has sufficient engagement
with the valve stem�
• Verify the key correctly fits in bore/keyways
applications�
• Check that the valve works in manual
operation� If not, it is necessary to check the
manual control area as follows:
- Loosen the handwheel security dowel�
- Remove the handwheel�
- Remove the cover supporting the
handwheel�
- Check the integrity of the internal parts�
- Proceeding with the assembly, follow the
reverse order of the disassembly�
- Make sure there are no foreign bodies� Pay
attention not to damage the O-ring seals�
