UPS user manual
Utilizzo dell’UPS
OMS02083 REV. A 51
Alarm
A61 LOSS OF REDUNDANT POWER SUPPLY
Description Failure of the redundant auxiliary power supply .
Possible
causes
Internal fault.
Solutions 1. 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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