During preventive maintenance at customer site, the autopulse platform (sn (b)(4)) failed initial functional testing and displayed user advisory (ua) 2 (compression tracking error) error message.The root was due to defective load cells, likely due to a defective component or mishandling such as drop.During visual inspection, no issue was observed during functional testing, the platform displayed ua 2 error message due to a defective load cell 1 that was confirmed by load cell characterization test.After replacing the load cell 1 to address ua 2, during further functional testing the platform displayed ua 17 (max motor on time exceeded).The root cause of the ua 17 issue was due to the brake gap being out of specification.The brake gap was readjusted to remedy the fault.The platform was manufacture on 16 july 2016 and there was no preventive maintenance performed.After service, the autopulse platform was subjected to the run-in test using the 95% patient large resuscitation test fixture (lrtf) with good known test batteries for 15 minutes without any fault or error.The autopulse platform passed the final testing without any fault or error.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 sn (b)(4).
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