ATV320 is flashing STO and NST Error Code ?
If the drive flash between STO/NST, then NST /STO, it looks like a short circuit between 0V and internal 24V of the drive.
The recommendation is to remove all terminal connections and wires from ATV320 ( DI1, DI2, DI3, STO, +24V, P24......).
First, connect and check screw of P24/STO.
Be sure that STO is connected with "original jumper" to P24.
Then check that SW1 switch is set on "SOURCE" and connect DI1 with a very short cable to +24V.
Now, the drive will have only STO connected to P24 , & DI1 connected to +24V terminal. If the drive still flashes STO/NST, please consider changing the drive and contact Schneider Electric Support.
The recommendation is to remove all terminal connections and wires from ATV320 ( DI1, DI2, DI3, STO, +24V, P24......).
First, connect and check screw of P24/STO.
Be sure that STO is connected with "original jumper" to P24.
Then check that SW1 switch is set on "SOURCE" and connect DI1 with a very short cable to +24V.
Now, the drive will have only STO connected to P24 , & DI1 connected to +24V terminal. If the drive still flashes STO/NST, please consider changing the drive and contact Schneider Electric Support.
Released for: Schneider Electric Australia
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales inquiry online and an expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Centre
Find support resources for all your needs, in one place.