The present invention relates to an infusion pump (10) having a control unit (5) and a graphical user interface (3) functionally connected to the controller (5), wherein the control unit (5) is designed to receive at least two sensor signals (S1,S2) out of the following group of sensors: cassette presence sensor, door sensor, pressure sensor, air presence sensor, motor sensor, flow rate sensor, wherein the control unit (5) is designed to detect an error state based on the analysis of the at least two supplied sensor signals (S1,S2), wherein the control unit (5) is designed to associate a degree of severity out of at least two degrees of severities (A1,A3) based on the processing of the supplied sensor signals (S1,S2), and wherein the control unit (5) is designed to control a color of the display (1) of the graphical user interface (3) to be displayed, wherein a different color is associated with each degree of severity (A1,A3) as well as with a non-error state (A0).
