October 2020
Installation, Operation and Maintenance Manual
MAN-10-04-100-0711-EN Rev. 0
42
Maintenance and Troubleshooting
Section 7: Maintenance and Troubleshooting
7.2.3
The Actuator does not work from Remote Controls
Check that:
•
The wiring to terminals 32, 35 and 36 is correct
•
There is no short circuit between wires
•
The electrical load does not exceed 4 W
•
If external voltage is used, the value has to be in the 24-120 V AC/DC range
7.2.4
The motor is Very Hot and does not Start
•
Wait until the motor cools down before trying to operate the actuator again
•
Check that the number of operations per hour and their duration is suitable for
the actuator service (see the name-plate)
•
Check that the valve operating torque is within the range of the unit’s designed
operating torque
•
Always check the causes of abnormal operation
7.2.5
The Motor Runs but the Actuator does not
Move the Valve
•
Verify that the drive insert correctly fits in the actuator base
•
Verify that the drive insert has enough engagement with the valve stem
•
Verify that 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
—
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
7.2.6
The Valve does not Seat Correctly
•
If the valve is stopped by torque in closing, increase the actuator output torque limit
•
If the valve is stopped by position 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
