UPS user manual
Utilizzo dell’UPS
OMS02083 REV. A 45
Alarm
A25 INVERTER OFF
Description The inverter is blocked due an operation failure.
Possible
causes
Various.
Solutions 1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A26 COMMUNIC ERROR
Description Internal error.
Possible
causes
Microcontroller communication problems.
Solutions 1. If the alarm persists, contact our Technical Support Service.
Alarm
A27 EEPROM ERROR
Description The controller has detected an error in the parameters stored in
EEPROM.
Possible
causes
Wrong parameters entered during programming.
Solutions 1. Contact our Technical Support Service.
Alarm
A28 CRITICAL FAULT
Description An alarm has been activated which causes the shutdown of part of the
UPS (rectifier, inverter, static switch).
Possible
causes
System failure.
Solutions 1. Check which alarms are present and carry out the indicated
procedures.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A29 MAINTENANCE REQ
Description It is necessary to carry out maintenance work.
Possible
causes
The time limit since the last maintenance work has elapsed.
Solutions 1. Contact our Technical Support Service.
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