Solution : https://service.sap.com/sap/support/notes/98377 (SAP Service marketplace login required)
Key words : 
sap system supports presently, wage type /3ac, wage type /3an, create constant cc3bc, source code corrections, additional key words, 5 illness days => /3bc = 4, 5 illness days => /3bc = 7, 5 illness days => /3bc = 5, illness days
Related Notes : 
       
| 176020 | CONSULT.: Días de ausencia inpagada que no cotizan | 
| 137072 | CONSULT.: HRMS España - Notas de consultoría |