The autopulse platform ((b)(4)) was returned to zoll (b)(4) for evaluation.Historical complaints were reviewed for service information related to the reported complaint and there was no previous history of complaint reported for autopulse platform with serial number (b)(4).A visual inspection was performed and no discrepancies were observed.A review of the archive was performed and found user advisories (ua) 7 (discrepancy between load 1 and load 2 too large) was noted on (b)(6) 2016; thus confirming the reported complaint.The platform was functional tested and the autopulse exhibited user advisor (ua)7 (discrepancy between load 1 and load 2 too large) thus confirming the reported complaint.Further investigation indicated that one of the load cells (load cell 2) was defective.The load cell 2 was replaced to remedy the ua7.Following service, the power distribution board (pdb) was replaced per routine service procedure.Load cell characterization testing was performed and confirmed that both load cell modules are functioning within the specification.A run-in testing was performed using the 95% patient test fixture (lrtf) for 10 minutes without exhibiting any of the user advisory or fault.In summary, the customer's reported complaint of the platform exhibiting ua 7 was confirmed during archive review and functional testing.The root cause was attributed to a defective load cell 2.After the load cell 2 was replaced the autopulse platform passed all the testing and meets all required specifications.
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