VFD Problem

please open user manual and find out "OP 1" error means what?

then its easy to other to determine what are the possibilities to generate that error

Regarding OP1 error that is over voltage acceleration

Hi,

This fault is triggered by an overvolatge condiotion at the DC bus. Possible causes

The input voltage is fluctauting abnormally. Remedy: install a line reactor.

Power factor capacitor switching. Remedy: Set F302 to 2.

Drive is starting into a rotating load. enable catch on the fly parameter : F301. I would check if any of the dampers is jammed thus causing the load to rotate before starting.

Intermittent ouptput phase fault.Since you have changed the motor but the fault exists, then we can rule out output phase loss fault assuming the motor cables have been checked.

If the unit has been running for a while and this fault just came in, then I would suggest you check VFD for possible GND faults . Yo can do this by disabling phase loss fault and running the VFD with Motor disconnected. If the VFD trips on the same fault then it likely a GND fault is causing the VFD to trip. I would also try to swap the VFD with a simimalr unit and see if the fault disappers.

If none of the above works then I would suggest you contact your nearest Schneider service center.

You can email me direct if you need further help

cheers

Dear Friend,

Your data is not sufficient enough. You have not stated whether the motor has to start against the load or the motor is loaded after starting. If the motor is started against the load, then the Torque Demand, Gd^2 value comes in to picture.

What is OP1 - perhaps manufacturer's nomenclature/title for a specific function.

You may contact the supplier and take his help.

But I want to say the following.

1.The vfd has low starting torque, and the torque requirement may be more.

2.The voltage available at the starting moment, may be or can be in-sufficient. This is derived since the 2nd motor also does not start.

3. The driven equipment may have very high Gd^2 value and motor cannot handle thie required Gd^2. Hence the motor cannot start. This is also derived since the 2nd motor also does not start.

4. Your data, as I mentioned is not sufficient enough. You have not stated whether the motor has to start against the load or the motor is loaded after starting. If the motor is started against the load, then the Torque Demand, Gd^2 value comes in to picture.

Pl. post the information - what was the problem and how it is overcome.

DHAYANANDHAN.S