INF8 code, (internal power supply fault) on ATV71
Altivar ATV61 and ATV71
The control supply voltage is to incorrect.
Check the control supply voltages between +24vdc and com or +24V and 0V.
If using an external supply check +24Vdc supply connect between P24 and 0V, and insure the voltage is greater than 19Vdc and does not exceed 30vdc.