Results of investigation: this unit was serviced by a vyaire medical authorized service technician.The service technician examined the unit internally and discovered the speaker wire was disconnected.The service technician reconnected the wire, plugged the unit in, and removed ac power.The service technician got an audible "power fail" alarm.The service technician was able to correct the reported issue.
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It was reported to vyaire medical that while in use on a patient, the map (mean airway pressure) alarm was not audibly working.The map drifted and the alarm light came on, but no audible alarm occurred.The customer stated that the alarms were set appropriately, but ventilator did not sound when alarms reached the limit.
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