WE/XE/SE/XC Series
Quarter-Turn Electric Actuator
Installation & Maintenance Manual
13 12/17/19
www.atcontrols.com IOM8011 REVISION 01
8. Troubleshooting
Actuator does not
respond or operate
No power to actuator Turn on power
Low voltage to actuator Check power supply and wire gauge
Motor and supplied voltage are different Check nameplate voltage
Wiring is loose Check connection to terminals
Wiring is incorrect Wire according to supplied diagram
Limit switch or torque switch is tripped Manually operate to mid position
Worm gear is jammed Refer to section on jamming
Torque switch tripped
Mechanical travel stop set prior to position limit switch Reset travel stops
Foreign object between valve seat and ball/disc Clear objects
Actuator is undersized Check torques
Unable to manually
operate with
handwheel
Lever is not fully engaged Turn handle slowly while pulling lever
Worm gear is jammed Refer to section on jamming
Power is still on Turn off power
Actuator performance
is erratic
Motor is overheating and in thermal overload Check duty cycle – tune control loop
Motor is overheating and in thermal overload Check ambient temperature
A-T Controls product, when properly selected, is designed to perform its intended function safely during its useful life. However, the purchaser or user of
A-T Controls products should be aware that A-T Controls products might be used in numerous applications under a wide variety of industrial service
conditions. Although A-T Controls can provide general guidelines, it cannot provide specific data and warnings for all possible applications. The purchaser
/ user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation, and maintenance of A-T Controls
products. The user should read and understand the installation operation maintenance (IOM) instructions included with the product and train its employees
and contractors in the safe use of A-T Controls products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only. Because
A-T Controls is continually improving and upgrading its product design, the specifications, dimensions and information contained in this literature are
subject to change without notice. Should any question arise concerning these specifications, the purchaser/user should contact A-T Controls.
For product specifications go to http://download.a-tcontrols.com/
A-T Controls, Inc. • 9955 International Boulevard, Cincinnati, OH 45246 • Phone: (513) 530-5175 • Fax: (513) 247-5462 • www.atcontrols.com
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