ResMed Astral Series Clinical Manual page 169

Troubleshooting
Error code
504
505
506, 512
600
162
Action
Unable to learn the circuit.
1. Ensure that the circuit is not moved until completion of the test.
2. Check the circuit and attached accessories for blockages.
3. Ensure that there are no sharp bends or kinks in the circuit and the patient end is not
blocked.
4. If using humidification, ensure that the humidifier tub is not overfilled.
5. Follow the on-screen instructions carefully:
circuit should not be blocked during step 2
•
circuit should be completely blocked during step 3.
•
If problem persists, this circuit may not be compatible with the Astral device. Consider
selecting another circuit configuration.
The measured circuit resistance exceeds safe operating limits for this device.
1. Check the circuit and attached accessories for blockages.
2. Ensure that there are no sharp bends or kinks in the circuit and the patient end is not
blocked.
3. If using humidification, ensure that the humidifier tub is not overfilled.
4. Follow the on-screen instructions carefully:
circuit should not be blocked during step 2
•
circuit should be completely blocked during step 3.
•
If problem persists, this circuit may not be compatible with the Astral device. Consider
selecting another circuit configuration.
Hardware fault detected. Contact an authorised Service Centre.
Unable to calibrate Expiratory Flow Sensor.
1. Check the circuit adapter is clean, dry and firmly inserted.
If the adapter is wet, then removing the adapter and vigorously shaking to clear
•
water can be effective. Re-insert adapter firmly and repeat Learn Circuit.
If the adapter is not clean, then it will need to be replaced.
•
2. If using a small diameter paediatric breathing circuit, consider using an anti-bacterial
filter or a 22-mm adapter on the expiratory adapter port.
3. Repeat Learn Circuit and ensure that the circuit is not moved until completion of the
test.
If problem persists, then the expiratory flow sensor may need to be replaced.