The customer reported that the autopulse platform (s/n (b)(4)) displayed user advisory (ua) 07 (discrepancy between load 1 and load 2 too large).It is unknown where the problem occurred.However, patient use information was requested, but no additional information was provided.
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The reported complaint that "the autopulse platform (s/n (b)(6) displayed user advisory (ua) 07 (discrepancy between load 1 and load 2 too large)" was confirmed during functional testing and based on the review of the archive data.The root cause of the ua07 advisory message was the defective load cell 2.The broken enclosures and the defective load cell were likely attributed to mishandling such as a drop.During visual inspection, the front and bottom enclosures were observed damaged, unrelated to the reported complaint.Based on the photos provided by the zoll service team, vertical cracks and chips were going through the screw fittings of the enclosures.In addition, there were cracks and breakages in the interior of the bottom enclosure.The observed physical damages appeared to be the characteristics of harsh impacts due to user mishandling.The front and bottom enclosures were replaced to address the issues.Review of the archive data showed multiple ua07 advisory messages around the customer's reported event date; thus, confirming the reported complaint.Functional testing failed due to the ua07 advisory message displayed upon powering up the platform; thus, confirming the reported complaint.A load cell characterization test was performed and verified that load cell 2 was defective, and it was replaced to remedy the fault.Following service, a load cell characterization test was performed and confirmed both cell modules are functioning within the specification.The autopulse platform was subjected to a final run-in test using the 95% large resuscitation test fixture (lrtf) with known good test batteries until discharged without any fault or error.Historical complaints were reviewed for service information related to the reported complaint, and there was one similar complaint reported for autopulse platform with serial number (b)(6).Ccr (b)(4) was reported on (b)(6) 2018, and the defective load cell was replaced to remedy the issue.
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