ResMed ASTRAL 100 Manuallines For The Operation page 12

8. Alarm priority
Alarms are classified into relative priority (high, medium and low) according to the severity and
urgency of the alarm condition. Respond to all alarms. An immediate response is required for
high priority alarms.
9. Replacing the air filter
Inspect the condition of the air filter and check whether it is blocked by dirt or dust. With normal
use, the air filter needs to be replaced every six months (or more often in a dusty environment).
CAUTION
Do not wash the air filter, it is not washable or reusable.
To remove and replace the air filter
1. Unlock the air filter cover by turning in an anti-clockwise direction.
2. Pull the air filter cover from the device.
3. Pull the air filter from the cover and discard.
4. Insert a new filter into the cover.
5. Insert the air filter and cover into the device.
6. Turn in a clockwise direction to secure.
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