A ventilator was returned to the manufacturer for routine preventative maintenance.There was no allegation of device malfunction.There was no harm or injury reported.During the evaluation of the device at the manufacturer's service center, a "service required" code was found in the ventilator's downloaded error log.The device's internal battery was replaced to address the issue.In addition of the above evaluation, the technician performed repair test, alarm check, battery check, run in tests, cleaning then confirmed the unit operated properly and software version was checked, which was not related to the malfunction/issue.
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