How can you be sure that the defib works when necessary?

Defib Service Plus has a rigorous maintenance program and Philips defibs perform an extensive self-test routine every day. Most defib malfunctions are caused by inadequate maintenance. A Philips defib requires maintenance every 2 years (replacement of pads & battery), and since we always perform this, the defib will always be ready for deployment. You can always check this yourself: if the green light in the upper left corner is flashing green, Philips guarantees 100% that the defib is ready for use. In the unlikely event that a malfunction is detected during the daily self-test, rendering it no longer ready for use, the green light will flash red and the defib will sound loud chirps to alert you that action is required. In such a case, we will exchange the entire defib on-site.