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February 2020
Installation and Maintenance Instructions
MAN-02-04-99-0712-EN Rev. 1
Maintenance and Troubleshooting
Section 7: Maintenance and Troubleshooting
7.2.2
24 V DC Output Voltage not Available at the Terminals
•
Switch the main power supply off and disconnect all wires from terminals 33 and 34
•
Switch the main power supply on and check if the voltage on terminals 33 and 34
is between 22 and 26 V DC
•
If the voltage is correct, check the external wiring and the electrical load. It should
not exceed 4 W
•
If the voltage is not correct, replace the entire drive and control unit
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 (refer to the nameplate)
•
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/keyway 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
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When proceeding with assembly, follow the reverse order of the disassembly
—
Make sure there are no foreign bodies present. Take care not to damage
the O-ring seals or gaskets.
