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MOST COMMON CAUSES OF ‘MALFUNCTION’
• Actuator is in ‘MANUAL’ mode
• Valve is jammed and actuator’s electronic torque limiter has engaged
• Incorrectly sized actuator for the application
• Incorrect wiring
• Incorrect power supply
• Incorrect command signal/ Poor quality of control signal in modulating applications
INFORMATION NEEDED WHEN REPORTING A ‘FAULTY’ ACTUATOR
Please provide as much of the information below when reporting a ‘faulty’ actuator. (* minimum required)
1) *Actuator type and model number from main ID label
2) *Actuator serial number from main ID label
3) *Actuator function. Options: on-off, failsafe, 0-10V modulating, 4-20mA modulating, failsafe modulating 0-10V, failsafe modulating 4-20mA
4) * External supply voltage being applied
5) Valve type, material, and size
6) Valve duty – media, pressure, temperature
7) Valve installation location – Inside building, inside cabinet, outside protected from weather, outside exposed to weather, salty atmosphere (coastal/ ship) etc
8) Frequency of operation
9) * What is the LED light doing?
10) * Symptoms of ‘failure’ – Provide as much information as possible.
11) How long has it been installed, has it always worked until now, what changed recently, what new equipment was added to the system etc?
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