LEGRAND KEOR HPE Manuel De Fonctionnement page 223

Alarm
Description
Possible
causes
Solutions
64 OMP06263 REV. B
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS
A64 ULTRA FAST GRID MONITOR
Sudden drop of the AC input voltage (fast sensor)
 Voltage drop on the AC mains (brown-out).
 Possible internal fault.
1. Check the mains voltage.
2. If the alarm persists, contact our Technical Support Service.