LEGRAND UPS, User Manual

Page: 48 / 164

UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
48 OMG38225 REV. B
Alarm A5 DC VOLTAGE FAULT
Description The measured DC voltage is out of tolerance.
Possible
causes
The battery has reached the discharge voltage due to a power
failure.
Measuring circuit failure.
Solutions 1. Check the actual value of the measured DC voltage.
2. In case of mains failure, wait for the AC voltage to be restored.
3. Check which alarms are present and carry out the indicated
procedures.
4. Restart the device.
5. If the alarm persists, contact our Technical Support Service.
Alarm A6 BATTERY IN TEST
Description The rectifier voltage is reduced to start a short controlled discharge of
the battery.
Possible
causes
A battery test has been started automatically (if set), or manually
by the user.
Solutions 1. Wait for the test to end, and check possible battery faults.
Alarm A7 BCB OPEN
Description The battery isolator is open.
Possible
causes
Battery isolator open.
Solutions 1. Check the status of the battery isolator.
2. Check the functionality of the auxiliary contact of the isolator.
3. Check the connection between the auxiliary contact of the
isolator and the auxiliary terminals of the UPS (if provided).
4. If the alarm persists, contact our Technical Support Service.
Alarm A8 BATTERY DISCHARGE
Description The battery is discharging.
Possible
causes
The battery is discharging due to a mains failure.
Rectifier failure.
Solutions 1. Check which alarms are present and carry out the indicated
procedures.
2. If the alarm persists, contact our Technical Support Service.