NEW ACS800_04_0320_5 start problem

hello
we have a rtg crane which uses 4 acs800 abb drives(250Kw 68KW 135Kw 135Kw) connected with dc bus and each has an individual 3phase input line.
the main drive's (250Kw) IGBT was destroyed by unknow reason , we had a spare drive which we replaced by the broken drive.
we checked resistor boxes ,motors cables,dc bus fuses and ... then we connected the 3 phase input line of the main drive but after 2 or 3 seconds it starts to sound wierd (sounds like an arc) so we just breaked the input in fear of any damage to new drive.
everything is checked and is ok and the replacement drive is completely new.
what could be the problem?
thanks in advance