What does a ground fault trouble indicate on the VISTA-128FBP and how do I locate it?

A ground fault is indicated by a CHECK or TRBL message on the keypad accompanied by zone 972, which specifically denotes an Earth Ground Fault (Page 60) [1].

To identify this or other system troubles, you can scroll through active events by pressing the [*] key (Page 58, 64) [1].

Once the wiring issue is physically corrected, the display can be cleared by entering your User Code + 1 (OFF) (Page 60, 65) [1].