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J3C TYPE ELECTRIC ACTUATOR TROUBLESHOOTING GUIDE
WHAT THIS GUIDE IS, AND HOW TO USE IT
This comprehensive document provides POSSIBLE SOLUTIONS and/or ADVICE for reported
‘faulty’ actuators, and is intended purely as a guide to identify possible causes and
remedies for actuators that are not working as expected.
• Use the index to identify the page in the document most likely to help.
• When a user sends a command signal to an actuated valve and it doesn’t respond, it is
usually automatically assumed that the actuator is faulty. In practice, in most cases, the
fault is either with the valve, or with the electrical system controlling the actuator, and
not the actuator itself.
• This document is intended to help identify where the problem is. J+J are not qualified
electrical, electronic or control engineers and therefore ‘POSSIBLE SOLUTIONS/ ADVICE’
contained in this document are only suggestions and recommendations based on 20 years
of practical experience.
• The warranty on the J3C S Type electric actuator relates to the product itself, and does
not extend beyond those parts supplied. All external equipment/ wiring/ influences are
provided by, and are the sole responsibility of, the customer.
• Errors & omissions excluded and subject to correction when identified.
INDEX