The autopulse platform in complaint was returned to zoll on 01/20/2015 for investigation.Investigation results as follows: visual inspection was performed and the following was observed: the top cover was cracked and the battery connector was damaged.From the condition of the returned unit, the cause of the damages appear to have been wear and tear.The platform was powered on and a constant user advisory (ua) 7 (discrepancy between load 1 and load 2 too large) was displayed.No further operation of the platform was possible due to the ua 7 code, thus confirming the complaint.Load cell characterization was performed and identified that load cell module 1 was under-reporting.Following replacement of the load cell module, the platform passed functional testing.A review of the platform's archive showed that on the reported event date of (b)(6) 2014, a ua 7 code as well as two ua 2 codes (compression tracking error) occurred.The cause for both codes was identified to be load cell module 1 not functioning properly.Based on the investigation, the part(s) identified for replacement were the top cover, battery connector and load cell module 1.In summary, the reported complaint was confirmed upon functional testing and during platform archive review.The platform displayed a constant ua 7 upon power on and, as a result, was non-functional.Evaluation of the platform identified the cause of the ua 7 to be load cell module 1 not functioning properly.In addition to the ua 7, two ua 2 codes were seen in the archive to have occurred on the reported event date.The cause for the ua 2 codes was also determined to be load cell module 1 under-reporting.Following service, including replacement of the damaged parts and load cell module 1, the device passed all testing criteria.
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