During the programming if you want to factory reset invt GD170 drive then follow these steps:

1. First press "PRG" button then display show "P00".
2. When display show "P00" then press "DATA/ENT" button then display show "P00.00".
3. When display show "P00.00" then press "UP" button and goto the parameter "P00.18".
4. Press "DATA/ENT" button and enter "1" then again press "DATA/ENT" button

After this all parameter reset to the factory default.