This read-only display string reports the state of the High Float Voltage alarm for the Dc1 plant, sourced from the HFV1 alarm point. It specifically flags that the float charging voltage, the steady maintenance-charge level applied to batteries, has exceeded its intended setpoint, distinct from a general high bus voltage condition. For example, an admin seeing this alarm active during normal float operation, rather than during a boost cycle, would suspect a charger calibration issue.