Here is what your computer manual says about exceeding decompression limits on page 50:
In the event that you have exceeded the no decompression limits, Leonardo will assist with specific information related to surfacing and related decompression information. Upon violating the no decompression limits, the computer will issue a sound alarm, and the display changes as in the figure 22, providing the diver with the following information: 1) Stop icon with the writing DECO, showing that the no decompression limits have been violated and that decompression stops must be performed. The arrow indicating UP flashes. 2) Depth of first decompression stage (the deepest), given in meters (m) or feet (ft.). It may vary from a maximum of 78 ft. to a minimum of 10 ft., by steps of 10 ft.. 3) Time in minutes for the first decompression stage (the deepest). 4) TOTAL icon, indicating the total ascent time, that is the time required to ascend to the deepest stage, respecting the ascent rate, PLUS the stop time at that depth and at any other subsequent stop (including the deep stop if necessary), PLUS the safety stop time, PLUS the time required to reach the surface after completing the decompression stages. 5) “DIVE. T” icon giving the total time spent while diving.