Pbroblems with Gildemeister CTX 400

Hi,

I got Gildemeister CTX 400 lathe with HEIDENHAIN EltroPilot operating system.
Recently i got problems with it. When i turn on machine i cant do reference correctly. First all axis goes to zeros and when turret is trying to do reference i get error "no phase current in the motor lines on the S2 axis" today i noticed the same error when Z axis is trying to do reference this error comes immediately "no phase current in the motor lines on the Z axis". I tried to change feed modules for the axes because they are the same and power module but no luck so i think that there is no problem with these modules.

Maybe someone has similar problems and could help with advices. Thank you.