FANUC Technical Support & Troubleshooting Spindle Alarm CodesFANUC Spindle Alarm Codes (AL-A Through AL-20)Alarm A (AL-A) ROM AbnormalityCause: Incorrect ROM, ROM not installed correctly, error with control circuit.Remedy: Install correct ROM, replace control circuit.Alarm 01 (AL-01) Motor OverheatCauses: Damaged motor fan, overload, motor cooler is dirty, loose connection.Remedy: Replace parts,..