Manufacturer's investigation conclusion: the reported event of a drop in flow and speed was confirmed.The centrimag 2nd generation primary console (serial #: (b)(4) was returned to the service depot for analysis.The returned centrimag 2nd generation primary console was evaluated and tested.The service depot was unable to confirm or duplicate the reported drop in flow and speed.The centrimag 2nd generation primary console was tested for an extended period at rpm levels as noted in the complaint with the associated motor (serial #: (b)(4) and flow probe (serial #: (b)(4).No issues with the flow levels were observed.A full functional checkout was performed, and the unit passed all tests.It was noted that the console¿s battery (serial #: (b)(4) will be expiring on 31jul19.The customer was informed and accepted the replacement of the battery.The battery was replaced with a new one and a successful battery maintenance was performed.A new backup system warning label was applied per field action ¿fa-q318-mcs-1¿.A log file was extracted from the system for analysis.A review of the log file showed data spanning approximately 33 days (20feb19 ¿ 25mar19 per time stamp).On 20feb19 at 23:38, the sub fault ¿sf_ifd_shutdown_detected¿ occurred and triggered the ¿system alert: s3¿.The flow dropped to 0 lpm and the motor speed decreased to ~3100 rpm.At the same time stamp, the sub fault ¿sf_ifd_underspeed¿ occurred and triggered the ¿set pump speed not reached: m5¿ alarm and the motor speed decreased to ~2900 rpm.On 20feb19 at 23:39, the sub fault ¿sf_flow_low_amplitude¿ occurred and triggered the ¿flow signal interrupted: f2¿ alarm.At the same time stamp, the ¿motor disconnected: m2¿ alarm occurred and cleared the ¿set pump speed not reached: m5¿ alarm.The ¿system alert: s3¿ alarm also was cleared.The root cause for the reported drop in flow and speed was not conclusively determined through this analysis.No further information was provided.The manufacturer is closing the file on this event.
|