Installation, Operation and Maintenance Manual
MAN-02-04-97-0713-EN Rev. 1
October 2019
97
Section 12: Troubleshooting
Troubleshooting
If the local display changes the valve position indicators:
• Verify that the stem nut ts correctly in the actuator base.
• Verify that the stem nut has sufcient engagement with the valve stem.
• Verify that the key correctly ts in bore/keyways applications.
• Check that the valve works in manual operation. If not, 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.
— Ensure that no foreign bodies are present. Be careful not to damage the
O-ring seals.
Figure 85
12.6 The Manual Override Cannot be Engaged
If engagement of the manual override lever proves difcult, check whether the drive sleeve
is stuck and proceed as follows:
• Open the cover.
• Try to move the drive sleeve with a screwdriver.
• 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, and then readjust the setting of the position limit.
• The internal trim of the valve may be damaged.
To Next Page
Loading...
Need help?
General
