A diagnostics system for a display case includes a display case, a display device, and a remote controller, according to some embodiments. The display case includes a local controller, a refrigeration apparatus, and multiple sensors. The remote controller includes a processing circuit configured to receive diagnostics data from the local controller of the display case, according to some embodiments. The processing circuit is configured to identify one or more events using the diagnostics data and assign a rank to each of the one or more events. The processing circuit is configured to promote the rank of each of the one or more events based on an amount of time that each of the one or more events persists. The processing circuit is configured to operate the display device to notify a user regarding the one or more events and the rank of each event.