VFD Fault alarms at low speed

[Rob2025]

Well, YOU said the “NC contact changes status to NO”, so SOMETHING is programmed to do that. I was just speculation as to what that might be. You really need to call your Vacon supplier and get their help.

Ok, will try to find out more from Vacon or Danfoss.
Thanks Jraef!

 

[kwired]

From post 17 and based on what it says in the parts of the manual you posted, terminals 24-25-26 are by default fault outputs to send some signal to some other component when the drive is in a fault condition. Since you don't seem to be having any fault conditions they must be configured to some the optional functions and you maybe need to check the parameters mentioned in those instructions of G2.3.1 or possibly P2.3.9 to determine what this output relay is set to do, because whatever it is it must apparently be seeing a condition it was set to respond to and is apparently associated to a run or enable input somehow that wouldn't give you any fault if it opens the circuit but rather just a stop or maybe a zero frequency command for whatever reason.

 

[Rob2025]

Well, YOU said the “NC contact changes status to NO”, so SOMETHING is programmed to do that. I was just speculation as to what that might be. You really need to call your Vacon supplier and get their help.

Sure, I will call Vacon to get their help.

 

[Rob2025]

From post 17 and based on what it says in the parts of the manual you posted, terminals 24-25-26 are by default fault outputs to send some signal to some other component when the drive is in a fault condition. Since you don't seem to be having any fault conditions they must be configured to some the optional functions and you maybe need to check the parameters mentioned in those instructions of G2.3.1 or possibly P2.3.9 to determine what this output relay is set to do, because whatever it is it must apparently be seeing a condition it was set to respond to and is apparently associated to a run or enable input somehow that wouldn't give you any fault if it opens the circuit but rather just a stop or maybe a zero frequency command for whatever reason.

Yes, I just found P2.3.9 But I still have to find what application the drive is programmed for to select the correct Output signal

 

[ptonsparky]

Yes, I just found P2.3.9 But I still have to find what application the drive is programmed for to select the correct Output signal

What is it being used on?
A fan or pump?

An auger delivering 250# of product per hour?

 

[ptonsparky]

Did you look for the error or fault code history?

 

[Rob2025]

What is it being used on?
A fan or pump?

An auger delivering 250# of product per hour?

It is used to run a conveyor motor at a low speed of 3m/mt (12.50Hz). So, it could be Local/Remote application. Currently I am away, should be able to work on this equipment in the next week.