UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
OMG38225 REV.F
59
Alarm
A61
MAX VDC
Description
The alarm is activated when the DC voltage exceeds
910 V
(
455 V
for each
capacitors bank). The alarm must be manually reset by display
Possible
causes
Rectifier shuts down (alarm A3)
Inverter shuts down (alarms A13 and A25) and remains blocked
Load is transferred to bypass (alarm A16)
Solutions
1.
Test the parallel operation and check the synchronisation
parameters.
2.
Check the correct operation of the static switch.
3.
Contact our Technical Support Service.
Alarm
A62
MAINS OVERVOLTAGE
Description
Sudden increase of the AC input voltage (fast sensor)
Possible
causes
Voltage spike on the AC mains.
Possible internal fault.
Solutions
1.
Check the mains voltage.
2.
If the alarm persists, contact our Technical Support Service.
Alarm
A63
START SEQ BLOCK
Description
During the UPS start-up a failure prevented the proper execution of the
sequence.
Possible
causes
Control devices in wrong position or operated improperly.
Possible internal fault.
Solutions
1.
Make sure the position of the control devices (isolators, selectors) is
as specified in the procedures (see “Installation and start-up” section).
2.
If the alarm persists, contact our Technical Support Service.
Alarm
A64
MAINS UNDERVOLTAGE
Description
Sudden drop of the AC input voltage (fast sensor)
Possible
causes
Voltage drop on the AC mains (brown-out).
Possible internal fault.
Solutions
1.
Check the mains voltage.
2.
If the alarm persists, contact our Technical Support Service.
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