UPS user manual
Utilizzo dell’UPS
50 OMS02083 REV. A
Alarm
A53 FIRMWARE ERROR
Description The controller has detected an incompatibility in the control software.
Possible
causes
The software update was not performed properly.
Solutions 1. Contact our Technical Support Service.
Alarm
A54 CAN ERROR
Description Internal error.
Possible
causes
Microcontroller communication problems.
Solutions 1. Contact our Technical Support Service.
Alarm
A55 PAR CABLE DISC
Description Parallel cable doesn't communicate.
Possible
causes
Parallel cable disconnected or damaged.
Solutions 1. Check the connection of cable
2. Contact our Technical Support Service.
Alarm
A56 MAINS UNBALANCE
Description The rectifier input voltage is unbalanced.
Possible
causes
Problems on the LV or MV distribution network
Defect of the measuring circuit
Solutions 1. Check the input voltage
2. Contact our Technical Support Service.
Alarm
A59 BACKFEED RELAY ON
Description The backfeed protection has been activated. Alarms present only in the
history log.
Possible
causes
Problems on the bypass static switch
Solutions 1. Check the static switch thyristors
2. Contact our Technical Support Service.
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