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equipment damage.
(2)Failure to follow the load start-up sequence which shall begin with
heavy-duty equipment to low-duty ones. Restart UPS and wait till UPS
runs stably; first start heavy-duty equipment and then devices of lower
duties.
Problem 5
UPS works properly after start-up, and automatically shuts off after a certain
period of time.
Cause: battery unit is not charged in time and is working under battery supply
status (not powered or not connected to power grid), thus resulting in battery
low-voltage protection of the UPS.
Warning: in the case of UPS battery low-voltage protection, please immediately
turn off all switches, and restart the UPS and charge the battery to full capacity
when power supply recovers. Long-period low-voltage of the battery will
shorten the service life of the battery.
Problem 6
After working for a certain period, with normal input display, the buzzer gives
intermittent buzzing and displays battery low-voltage simultaneously. Cause:
too-low power grid voltage makes the UPS work under battery feed status.
When the battery runs low and low-voltage occurs, it enters into protection
status.
Problem 7
UPS is started and working. When power supply breaks down, UPS fails to
output power.
Cause: the battery unit is not connected to main unit or is severely damaged.
4.7
Troubleshooting
4.7.1
Overview
In the case of device failure, first of all, find out any obvious damage and try to
determine what causes the failure: device problem or external environment
