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8 Possible malfunctioning
The UPS always operates on batteries:
• There is no line voltage
• Line voltage is out of allowed UPS range
• The power supply cable is not correctly connected to mains socket.
• The input circuit breaker has to be reset
• The mains socket is defective
The UPS signals overloading:
• Additional loads to the ones normally connected have involuntarily been connected on the
output line.
• Check all the loads connected to the output
The UPS doesn’t operate in battery mode (it shuts down or immediately signals it is close to the
operating limit):
• The UPS has operated with no mains voltage for a long time and has not been able to recharge
the battery. Recharge it for at least 6 hours by connecting the uninterruptible power supply to
the mains.
• The battery is flat due to not using the UPS for a long period. Recharge it for at least 6 hours by
connecting the uninterruptible power supply to the mains.
• The battery has run down due to being used frequently, to ambient conditions, or to having
exceeded its average service life; it is necessary to change it.
The UPS doesn’t deliver power to the output:
• Check that the loads are correctly connected to the output sockets
