O2 Concentration Alarm Troubleshooting

O2 Concentration activates after five minutes or more (depending on VOCSN configuration settings) when the internal O2 Concentrator produces less than 82% oxygen, or less than 80% of the target pulse dose volume. It will also activate if there is a fault with the internal oxygen sensor that measures gas created by the internal O2 Concentrator, or if the monitored oxygen tank pressure is less than 4 PSI when using an external source of high-pressure oxygen.

Follow these steps to troubleshoot this alarm:

1. Run a Pre-Use Test.
2. If using the internal O2 Concentrator, ensure there is adequate airflow around the device. VOCSN has an air inlet and a fan in the back of the device that cannot be blocked. Make sure nothing is covering VOCSN. Check the air and fan filters. If they are soiled or damaged, clean them or replace them following your facility’s protocol.
3. If using a patient circuit with O2 tube:
1. Ensure the O2 tube is fully connected. The rubber connector should be flush against the side of VOCSN. (Note it may take up to 1 hour for oxygen alarms to resolve after fixing an issue with the O2 tube connection.)
2. Check the O2 tube for blockages.
4. If using an external source of high-pressure oxygen, check to make sure it is connected and is not depleted. If necessary, connect to a different high-pressure oxygen source.
5. If the problem persists, replace the patient circuit.
6. If the problem continues after replacing the patient circuit, please fill out this form. One of our clinical specialists will contact you.