This read-only object returns a comma-separated event string containing a date (dd/mm/yy), a time (hh:mm:ss), and an event type indicating whether a fault cleared or occurred. This is the human-readable fault history that turns a raw alarm bit, like cdd564RxAlarm, into an actual timestamped record of when a specific condition started and ended, exactly the data needed to correlate an outage report from a customer against the unit's own internal fault log. A logged entry reading something like '15/03/26,14:32:07,Fault' followed later by '15/03/26,14:47:22,Clear' would let an admin pin down that a fault condition lasted roughly 15 minutes on that specific date, useful for correlating against a reported service interruption.