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The remaining battery charge is below 
15%.The device can be powered by the 
internal battery for maximum 2 minutes. 

Connect the device to mains power.
Note: In case of a total power failure, the 
therapy settings will be stored and therapy 
will resume when the device is powered 
again.

Component failure. 
The device stops delivering air pressure 
(system failure 6, 7, 9, 22, 38). Therapy 
cannot be started (system failure 21).

1. Power-off the device.
2. Power-on the device again.
 

Component failure (system failure 8, 25).

1. Power-off the device.
2. Power-on the device again.

The device generates a pressure that is 
greater than 60 cm H

2

O. Treatment will 

be stopped.

1. Power-off the device.
2. Check that the air tubing is connected 

properly.

3. Power-on the device again.
4. Start Learn Circuit function.
Note: If the alarm activates repeatedly 
internal components may be defective. 
Discontinue use and return the device for 
servicing.

Air path is blocked.

1. Check the air path for any blockages.
2. Remove the blockages.
3. If the alarm is not cleared, stop 

treatment. 

4. Re-start treatment. 

The temperature inside the device is too 
high. Treatment may lead to stop.

Ensure the ambient temperature is within 
the specified operating range. If the 
problem persists within the specified 
operating conditions please return the 
device for servicing.
Contact your clinician.

Therapy pressure exceeds pre-set alarm 
level.

1. Stop treatment. 
2. Re-start treatment. 
If the problem persists contact your 
clinician.

The air tubing is not connected properly.

1. Check the air circuit integrity and 

reconnect.

2. If the alarm doesn‘t get cleared, stop 

treatment.

3. Re-start treatment.