Solution : https://service.sap.com/sap/support/notes/705886 (SAP Service marketplace login required)
Key words : 
setdb4pwd \\<cihost>\saptext\<sid>\sys\profile\ntlogon, setdb4pwd /usr/sap/<sid>/sys/profile/ntlogon, terms qpwdlvl dbs/db4/ntlogonfile ntlogon, sap<sid>_<inst> services, inf iseries db2/400 as400, iseries db2/400 solution support, nt application servers connecting, nt/linux application servers, inf                 <sid>adm <, sap service marketplace
Related Notes : 
       
| 1648606 | DB4:Wrong <sid>ADM is set in NTLOGON.INF | 
| 748664 | iSeries: Termination in AS4_GET_PTF_STATUS_ALL or DB4PTFCHK |