Our fan VFD keeps faulting out about every hour. To rule out a bad motor, I disconnected the motor wires from the VFD. After that, the VFD runs good all day (no more faults). Is that a reliable way to determine a bad motor or bad VFD?
abb acs141-1k6-1What type of drive? AB Powerflex? SEW? Automation Direct? Etc.
FL 4 * Fault current:Is there a fault code on the drive when the fault occurs? What is the fault code? Is it the same fault code every time the fault occurs?
It varies but it ran up two an hour before fault out.Does this fan run continuously for the full hour between faults?
Meggered the motor. No issue found.Regardless, I would definitely check resistance on the motor using a multimeter or Megger with the motor disconnected from the drive. I would also take current readings on each phase of the motor during normal operation (some VFDs will provide you with this data in the motor parameters).
abb acs141-1k6-1What type of drive? AB Powerflex? SEW? Automation Direct? Etc.
FL 4 * Fault current:Is there a fault code on the drive when the fault occurs? What is the fault code? Is it the same fault code every time the fault occurs?
It varies but it ran up to one hour before faulting out.Does this fan run continuously for the full hour between faults?
Meggered the motor. No issue found.Regardless, I would definitely check resistance on the motor using a multimeter or Megger with the motor disconnected from the drive. I would also take current readings on each phase of the motor during normal operation (some VFDs will provide you with this data in the motor parameters).
You seem to show that there are three faults covered by that code.
Don't ignore the Supply Disturbance - it could allow the drive to function without fault when the motor isn't connected because the supply will be affected by the power pulled by the VSD.
Our fan VFD keeps faulting out about every hour. To rule out a bad motor, I disconnected the motor wires from the VFD. After that, the VFD runs good all day (no more faults). Is that a reliable way to determine a bad motor or bad VFD?