You are currently viewing the content available in Vietnam. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
Issue:
tNF fault on the ATV31 and ATV312 drive.
Product Line:
Altivar ATV31 and ATV312 drive
Environment:
All
Cause:
Drive is doing auto tune on power on or motor is disconnected during tune check.
Resolution:
tnF [AUTO TUNING FAULT]
• Special motor or motor whose power
is not suitable for the drive
• Motor not connected to the drive
• Use the L ratio or the [Var. torque] (P) ratio (see
[U/F mot 1 selected] (UFt), page 44).
• Check that the motor is present during auto tuning.
• If an output contactor is being used, close it during
auto-tuning.
tNF fault on the ATV31 and ATV312 drive.
Product Line:
Altivar ATV31 and ATV312 drive
Environment:
All
Cause:
Drive is doing auto tune on power on or motor is disconnected during tune check.
Resolution:
tnF [AUTO TUNING FAULT]
• Special motor or motor whose power
is not suitable for the drive
• Motor not connected to the drive
• Use the L ratio or the [Var. torque] (P) ratio (see
[U/F mot 1 selected] (UFt), page 44).
• Check that the motor is present during auto tuning.
• If an output contactor is being used, close it during
auto-tuning.
Released for:Schneider Electric Vietnam
