[?]: siemens 6RA70 dirves field card getting faulty

[chiraga2001]

I have 6RA70(1600A) drive installed in my cranes but within the time span of 1year, its field card is getting faulty.
On reporting to siemens they declared those card unrepairable.
So we have to replace it with new one.
Anybody having idea to repair it.....