LEGRAND KEOR HPE Manuel De Fonctionnement page 224

Alarm A52
The inverter is blocked because of an anomaly on the control power supply.
Description
Possible
causes
Solutions
Alarm A53
Description The controller has detected an incompatibility in the control software.
Possible
causes
Solutions
Alarm A54
Description Internal error.
Possible
causes
Solutions
Alarm A55
Description Parallel cable doesn't communicate.
Possible
causes
Solutions
Alarm A56
Description The rectifier input voltage is unbalanced.
Possible
causes
Solutions
Alarm A59
The backfeed protection has been activated. Alarms present only in the
Description
history log.
Possible
causes
Solutions
58 OMG38225 REV. F
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS
UNDER VOLTAGE LOCKOUT
 Internal error
1. Contact our Technical Support Service.
FIRMWARE ERROR
 The software update was not performed properly.
1. Contact our Technical Support Service.
CAN ERROR
 Microcontroller communication problems.
1. Contact our Technical Support Service.
PAR CABLE DISC
 Parallel cable disconnected or damaged.
1. Check the connection of cable
2. Contact our Technical Support Service.
MAINS UNBALANCE
 Problems on the LV or MV distribution network
 Defect of the measuring circuit
1. Check the input voltage
2. Contact our Technical Support Service.
BACKFEED RELAY ON
 Problems on the bypass static switch
1. Check the static switch thyristors
2. Contact our Technical Support Service.