KONV is a database table for all item conditions and KSCHL is condition type.
To find the value of KSCHL field:
Goto SE11 and give the table name KONV
Check out in the tab check table if there is any check table for this.
if it is there, double click on any one record in that table and check the F1 and F4 help for that field and check the description of that field to know possible values.
Just go to SE11 and enter the table name KONV after that click on contents buttons. U have seen the selection screen there u can find KSCHL field. Place the cursor on that field.