The following message is displayed on the device: "System fault, refer to user guide, Error 004 Description: Main PCB over temperature"

AirSense 10, AirStart, AirCurve, Lumis

Possible Causes:

• Issue with device conditions
• Blocked filter
• Air tubing blocked
• Water in the air tubing
• Faulty main PCB

Solutions:

• Ensure ambient temperature conditions within specified operating range
• Ensure device is not covered.
• Allow device to cool before re-use. Disconnect power supply then reconnect to restart device
• Replace filter
• Allow device to cool down
• Power-cycle to remove message
• Check air tubing and remove any blockages. Press dial to clear message
• Empty water from air tubing. Disconnect power supply then reconnect to restart device.
• Replace main PCB if the above solutions do not work