XSY-AT1 invester err 1 - how to reset, if possible?

Dear forum.

I have a XSY-AT1 inverter connected to my lathe motor and yesterday it stopped working with the displayed fault of "ERR 1".
To its defense, i was running "thread cutting rpm".

According to the manual this is "Short Circuit/Current overload/Power Module protection".

In the manual there are no instruction how to clear the fault and the red stop button just display STOP/RESET.
I have tried pressing it down for more than 60 sec and also tried other combinations, but no luck.
Everytime I touch the start button, it pops up as ERR 1.

I have disconnected the motor cables from the inverter to rule out motor error, but this had no impact. the error is in the inverter.


Have you guys tried similar and how did you fix it?

Thank you from DK