LEGRAND 311087, Руководство по эксплуатации

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UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
52 OMW07104 REV. A
Alarm A24 HIGH TEMPERATURE
Description High temperature of the heat sink on the inverter bridge or tripping of the DC
fuses which protect the inverter bridge.
Possible
causes

Fault of the heat sink cooling fans.

The room temperature or cooling air temperature is too high.

Tripping of the DC protection fuses.
Solutions Check the fans operation.
Clean the ventilation grids and the air filters, if any.
Check the air conditioning system (if present).
Check the status of the DC fuses on the inverter bridge input.
If the alarm persists, contact our Technical Support Service.
Alarm A25 INVERTER OFF
Description The inverter is blocked due an operation failure.
Possible
causes

Various.
Solutions Reset the system.
If the alarm persists, contact our Technical Support Service.
Alarm A26 COMMUNIC ERROR
Description Internal error.
Possible
causes

Microcontroller communication problems.
Solutions 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 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 Check which alarms are present and carry out the indicated
procedures.
If the alarm persists, contact our Technical Support Service.