This read-only display string reports the state of the Multiple Rectifier Fail alarm for the Dc1 plant, sourced from the MFA1 alarm point. It indicates that more than one rectifier module has failed at the same time, a more serious condition than a single rectifier failure since it further erodes the plant's on-line capacity margin. For example, this alarm firing alongside a large drop in on-line rectifier capacity would prompt an admin to treat the outage as urgent rather than routine.