Emerson Keystone EPI2 63 - The Actuator does not work from Remote Controls; The motor is Very Hot and does not Start; The Motor Runs but the Actuator does not Move the Valve; The Valve does not Seat Correctly

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 ts in the actuator base
• Verify that the drive insert has enough 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, 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