Date rec¿d by mfr :11apr2019.The field service engineer (fse) confirmed reported problem of high o2 alarm.The field service engineer (fse) replaced the sensor printed circuit board assembly which resolved the complaint.The fse reported device passed all performance tests and is ready to be returned to service.A sensor printed circuit board assembly (pcba) was return for analysis.A visual inspection was performed and no evidence of damage or contamination.The returned sensor pcba installed into the failure investigation (fi) test ventilator and the fi technician attempted to duplicate the reported issue high internal oxygen alarm.The device passed all tests and the reported issue could not be duplicated.Submission of a report does not constitute an admission that medical personnel, user facility, importer, distributor, manufacturer, or product caused or contributed to the event.
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