Cause : Input phase loss comes when one of the three input phases supplying power to the drive is missing or has insufficient voltage. The drive is not connected to a three-phase power supply.

"F017" fault in Schneider drive indicate "Input phase loss". This means there is a problem with the incoming power supply, such as a phase imbalance or voltage drop.

Follow these steps to correct the fault:

1. Check Power Supply: Verify that the drive is connected to a three-phase power supply and that all phases are present.
2. Inspect Fuses: Check the input fuses for the drive and replace any that are blown.
3. Measure Input Voltage: Use a multimeter to measure the voltage on all three input phases to check for imbalances or low voltage.