LEGRAND KEOR HPE 60 Manuel De Fonctionnement page 292

Alarm A63
During the UPS start-up a failure prevented the proper execution of the
Description
sequence.
Possible
causes
Solutions
Alarm A64
Description Sudden drop of the AC input voltage (fast sensor)
Possible
causes
Solutions
58 OMW07104 REV. A
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS
START SEQ BLOCK
 Control devices in wrong position or operated improperly.
 Possible internal fault.
Make sure the position of the control devices (isolators, selectors) is
as specified in the procedures (see "Installation and start-up" section).
If the alarm persists, contact our Technical Support Service.
MAINS UNDERVOLTAGE
 Voltage drop on the AC mains (brown-out).
 Possible internal fault.
Check the mains voltage.
If the alarm persists, contact our Technical Support Service.