Hitachi EX200-2 problems

Hi everyone, last year my excavator working perfect but one moment just sow a lot black smoke. Burn down EC, no diodes blinking. I have got other EC but wasn't EX200 it was FH200. Now then motor cold cylinders are slow and working only one using pilot action after few minutes motor stalls with black smoke. I tried to connec dr zx but i can't, then looked at blinks showed 2 long blinks. Can be all problems with PVC? With the same diagnostic cable connected to ex225-5 usr. In excavator changed new OEM DP sensor, angle sensor, tested all wires. Main pump was rebuilded. Are difference between Ex200 pvc/ec and zaxis 200 the same year?

P.S. sorry for mistakes