Solution : https://service.sap.com/sap/support/notes/331087 (SAP Service marketplace login required)
Key words : 
menu option character set->edit character set, select edit->check character set, russian ebcdic character set, additional key words cyrillic, special number symbol number_acronym, sap character set 561, russian number character, call transaction spad 2, sap system running, character set
Related Notes : 
       
| 99792 | AS/400: NLS on AS/400 4.0X (EBCDIC) |