To ensure dust and debris do not get inside the device, EXO's pump inlets are closed when there is nothing connected to them. Turning on a pump inlet without a tube connected may result in a pump blocked notification to let you know there is no gas coming in from the inlet.

The pump blocked notification also triggers when:

• Gas flow is restricted by something blocking the mouth of the tube.

• The tube gets bent or normal flow is obstructed.

• EXO is operating in temperatures of -20°C (-4°F) or colder.

A pump block detected event generates a low urgency notification and is logged in Blackline Live. You can mute the notification by pressing and holding the left and right buttons, or by connecting an unobstructed tube to the inlet that is trying to pull in air. When an unobstructed tube is connected, the inlet opens to allow air flow, and the notification ends.

After you have muted the pump blocked notification, you can perform a pump block test to confirm that the pump block has cleared.