UPS user manual
Utilizzo dell’UPS
48
OMD10082 REV. F
Alarm
A43
CURR ERROR LOOP
Description
The control is not able to regulate the rectifier output current precisely.
Possible
causes
Regulation system failure.
Solutions
1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A44
DESAT IGBT INV
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 TEMP SSW
Description
High temperature of the static switch heat sink.
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
PAR LOST REDUND
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.