A 45 error is, SS info lost, aux door close contacts open. You can reset the fault log from the UI menu. E is the log menu, sub menu 1 is the history, use up-dn buttons to scroll history. sub menu 2 will clear history, scroll from 0 to 1 hit select, this will clear history. You really have to have your super get you some manuals. This is a fairly complicated Unit. Good Luck