UPS user manual
Utilizzo dell’UPS
48 OMS02083 REV. A
Alarm
A40 SSI FAULT
Description The system has detected a failure in the static inverter switch.
Possible
causes
Possible problems on the loads.
Static switch fault.
Solutions 1. Check the absorption of the loads and the presence of DC
components, if any, on AC current.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A41 RECT ERROR LOOP
Description The control is not able to regulate the rectifier output voltage precisely.
Possible
causes
Regulation system failure.
Solutions 1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A44 DESATURATION (NOT AVAILABLE)
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.
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