Troubleshooting
English 67
Alarm message Action
Internal battery degraded
1. Connect the Astral to mains AC power.
2. Return the device for service to replace the internal battery.
The internal battery run time indicator may no longer be accurate and should not be relied
upon.
Last self-test failed
1. Perform a Learn Circuit.
2. If problem persists, return the device for service.
Low internal battery Connect the Astral to mains AC power to allow the battery to recharge.
Low FiO
2
1. Check the patient's status.
2. Check for leak.
3. Check the oxygen supply and connections to the device.
4. Perform a Learn Circuit to recalibrate the oxygen sensor.
Low MVe
1. Check the patient's status and airway.
2. Inspect the circuit and the expiratory valve for obstruction or leaks.
3. Perform a Learn Circuit.
Low MVi
1. Check the patient's status and airway.
2. Inspect the circuit for obstruction.
3. Perform a Learn Circuit.
Low PEEP
1. Check the patient's status.
2. Inspect the circuit and the expiratory valve for obstruction or leaks. When in use,
check for obstructions in proximal lines.
3. Perform Learn Circuit.
Low pressure
1. Check all circuit connections, especially the patient interface and the proximal sense
line.
2. Inspect the circuit and expiratory valve for damage or secretions.
3. Perform a Learn Circuit.
Low Pulse Rate Check the patient's status.
Low SpO
2
Check the patient's status.
Low Vte
1. Check the patient's status and airway.
2. Inspect the circuit and the expiratory valve for obstruction or leaks.
3. Perform a Learn Circuit.
Low Vti
1. Check the patient's status and airway.
2. Inspect the circuit for obstruction.
3. Perform a Learn Circuit.
No FiO
2
monitoring Perform a Learn Circuit to calibrate the oxygen sensor.
No SpO
2
monitoring
2
connection to patient's finger and the Astral.
2. If the alarm persists, use another SpO
2
oximeter or finger sensor.
NV Mask/Rebreathing For vented circuit:
1. Check that the mask vents are clear and unobstructed.
2. Check the mask type setting.
3. Perform a Learn Circuit.
For mouthpiece circuit:
Check that the interface is a mouthpiece and that the patient is not continuously exhaling
into the circuit.
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