A green flash every 30 seconds means that the pump is operating normally.

Three green flashes every 30 seconds means that the pump is charging.

A yellow flash every 30 seconds is displayed when the pump has an alert or reminder.

A red flash every 30 seconds means that there is an alarm and insulin delivery has stopped.

If the battery is completely drained, the screen will not turned on immediately when the pump is plugged in to charge. The LED flashes green every 2 seconds until the battery is charged enough to turn on. Please refer to Chapter 3, 'Getting to know your t:slim X2 insulin pump' in the User Guide for more information.