You must following than operations:
1) Restart OMU channel of BCF ( ZEFR:XX:OMU; (where XX- number of BCF))
2) IF the alarm become again please watch synchronization on bcf( use Nokia UltraSiteHub Manager)
3)If this operation not succeed please check the cabling and than replace the BOI
REMARK: IF BCF IT’S NEW PLEASE WAIT 1 DAY.