LEGRAND UPS, User Manual

Page: 55 / 164

UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
OMG38225 REV.B 55
Alarm A35 DIESEL MODE
Description The UPS is supplied by the diesel generator.
Possible
causes
The auxiliary contact which activates the diesel generator
connected to the UPS is closed, and imposes this operating
mode.
Solutions 1. Wait for the diesel generator to stop as soon as the mains
voltage is restored.
2. Check the connection of the auxiliary contact which signals the
diesel generator start, to terminals XD1/XD2.
3. If the alarm persists, contact our Technical Support Service.
Alarm A36 DC FASTSHUTDOWN
Description Inverter shutdown due to the operation of the protection sensor as a
result of sudden DC voltage variations.
Possible
causes
Battery fault.
Solutions 1. Check the battery.
2. Reset the system.
3. If the alarm persists, contact our Technical Support Service.
Alarm A38 INV --> LOAD
Description The load is fed by the inverter. This alarm is active for UPS systems in
“ECO” mode, where the preferential supply is from the bypass line.
Possible
causes
Temporary changeover due to bypass line failure.
Solutions 1. Verify the status of the bypass line and check whether other
alarms are present.
2. If the alarm persists, contact our Technical Support Service.
Alarm A39 INV ERROR LOOP
Description The control is not able to regulate the inverter voltage precisely.
Possible
causes
Regulation system failure.
Solutions 1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.