LEGRAND UPS - 8.2 Troubleshooting

UPS user manual
Manuel de l’utilisateur de l’ASI
Utilizzo dell’UPS
OMG38225 REV.B
47
8.2 TROUBLESHOOTING
Alarm
A1 MAINS FAULT
Description The voltage or frequency of the input line are out of tolerance.
Possible
causes
 Mains instability or failure.
 Wrong phase rotation.
Solutions 1. Check the connections to the mains.
2. Check the stability of mains voltage.
3. If the alarm persists, contact our Technical Support Service.
Alarm
A2 INPUT WRONG SEQ
Description The phase rotation on the rectifier input line is wrong.
Possible
causes
 Wrong connection of power cables.
Solutions 1. Check the phase rotation.
2. If the alarm persists, contact our Technical Support Service.
Alarm
A3 BOOSTER STOPPED
Description The rectifier has been temporarily disconnected and the inverter is fed
by the battery.
Possible
causes
 Instability of the AC line voltage or frequency.
 Possible fault in the rectifier control circuit.
Solutions 1. Check the parameters of the AC line voltage.
2. Restart the device.
3. If the alarm persists, contact our Technical Support Service.
Alarm
A4 BOOSTER FAULT
Description The rectifier has been disconnected due to an internal fault.
Possible
causes
 Possible fault in the rectifier control circuit.
Solutions 1. Check which alarms are present and carry out the indicated
procedures.
2. Restart the device.
3. If the alarm persists, contact our Technical Support Service.