Issue:
tnF fault on the ATV312 drives
Product Line:
Altivar ATV312
Environment:
All
Resolution:
The tnF [Auto Tuning Fault] is nearly always resolved when you change the tun parameter in the drC menu to No.
Do not set tun [Auto Tune] to run [Run] (every run command) or Pon [power on].
Any AC Drive only needs to be auto-tuned 1 time, if at all, and only on a cold motor, during startup commissioning.
The other options are there for applications where there are issues during startup and you want it to run repeatedly (a few times) while making changes with controls or load that may affect other functions in the drive.
Can also see tnF if tun is set to run and you're trying to run the AC Drive with no motor to test the drive.
“If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:
If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.
If you are not located in North America, please contact your local Customer Care Center for assistance:
Released for: Schneider Electric Singapore
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