The autopulse platform (s/n (b)(4)) was returned to zoll (b)(4) for analysis.External and internal visual inspection of the returned platform was performed and no damages were observed.A review of the autopulse archive was performed and the reported complaint that the platform displayed a ua8 (motor controller fault detected) fault was confirmed.The archive data shows that a ua8 fault occurred on the reported event date of (b)(6) 2014.The archive also shows that other user advisories occurred on the same date.These user advisories however, are unrelated to the reported complaint.These user advisories include ua45 (not at "home" position after power-on/restart), ua3 (error communicating with battery controller), ua18 (max take-up revolutions exceeded), ua28 (loss of clutch connectivity), and ua6 (max battery temperature exceeded).Functional testing was performed and the reported complaint of the platform powering down was confirmed.It was observed that the power distribution board was defective.Based on the investigation, the part identified for replacement was the power distribution board.In summary, the reported complaint of ua8 fault was confirmed based on review of the archive but was unable to reproduced during functional testing.The root cause for ua8 fault could not be determined.The reported complaint of the platform powering down, was confirmed during functional testing.The fault was found to be due to the defective power distribution board.The other user advisories observed in the archive review are unrelated to the reported complaint.The root cause for these user advisories could not be determined.Per the autopulse® resuscitation system model 100 user guide (pn: 12555-001), if the driveshaft is not at its home position when the autopulse is powered on, a user advisory (45) will occur.Per the autopulse maintenance guide (p/n 11653-001), ua3 is an indication that the battery may be loose or not fully inserted.For ua18, the autopulse has detected that there is no patient on the platform.Upon replacement of the power distribution board, the platform was re-evaluated through functional testing and the platform passed all testing criteria.
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