A5/A3â„¢ Service Manual 046-001141-00 3 - 35
Periodic Maintenance Breathing System Checks
3.10.3 Drive Gas Pressure Loss Alarm, N2O Cutoff Test
1. Set the O2 flow to 2 L/min using the flow control valve.
2. Set the N2O flow to 2 L/min using the flow control valve.
3. Set the AIR flow to 2 L/min using the flow control valve.
4. Interrupt the O2 supply to the A5/A3.
5. Verify that the flow of N2O and O2 stops within 2 minutes and that the flow of AIR (if available)
continues to flow at 2 L/min.
6. Verify the following alarms are activated:
• O2 Supply Failure appears on the screen
• An alarm tone sounds
7. Reconnect the O2 supply to the anesthesia system.
8. Close all 3 flow control knobs.
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