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.