LEGRAND BSK93, Operating Manual

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UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
60 OMP06263 REV. B
Alarm A44 INVERTER DESATURATION
Description The inverter is blocked due to the operation of the desaturation sensor
of the IGBT drivers.
Possible
causes

Inverter bridge fault.
Solutions 1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm A45 HIGH TEMPERATURE SSW
Description High temperature of the heat sink on the static switch.
Possible
causes

Fault of the heat sink cooling fans.

The room temperature or cooling air temperature is too high.
Solutions 1. Check the fans operation.
2. Clean the ventilation grids and the air filters, if any.
3. Check the air conditioning system (if present).
4. If the alarm persists, contact our Technical Support Service.
Alarm A46 LOST OF REDUNDANCY
Description This alarm is only active on PARALLEL systems. Continuity is not
ensured in the event of a fault on one of the UPS units.
Possible
causes

The total load is higher than the maximum expected value.

Possible failure on the measuring circuit.
Solutions 1. Check the load fed by the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm A47 PEAK BATTERY OVER CURRENT
Description The battery limitation current over the limits.
Possible
causes

The UPS detected the battery limitation current out of limits and
switch off the inverter, booster and disconnected the battery from
the UPS.
Solutions 1. Check the current sensor.
2. Check the battery blocks.
3. If the alarm persists, contact our Technical Support Service.