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 - Emerson Keystone EPI2 63 Installation, Operation And Maintenance Manual

Section 7: Maintenance and Troubleshooting
October 2020
7.2.3

The Actuator does not work from Remote Controls

Check that:
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7.2.4

The motor is Very Hot and does not Start

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7.2.5 The Motor Runs but the Actuator does not
Move the Valve
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7.2.6

The Valve does not Seat Correctly

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42
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
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
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
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
Installation, Operation and Maintenance Manual
MAN-10-04-100-0711-EN Rev. 0
Maintenance and Troubleshooting