5 Use and Operation
UPS IST7 (10KVA-40KVA)
User Manual
70
Charge the battery for 10 hours before using. During charging, the UPS still can be used,
but if power outage at the same time, the discharging time may be less than the standard
backup time.
Generally, charge and discharge the battery once every 4 to 6 months. Discharge the
battery till under-voltage and power off and then charge it. In high temperature area,
charge and discharge the battery once every 2 months. The charging time for the standard
battery should be more than 10 hours every time.
If the UPS hasn't been used for a long time, it is recommended to charge the battery more
than 10 hours every three months.
Generally, the working life of battery is 3 to 5 years. If battery is not so good, replace it in
time. The battery replacement should be performed by authorized professional.
5.7 Troubleshooting
5.7.1 Common Fault
Troubleshooting
Fault phenomenon Possible reason
The mains normal, after
starting the UPS, it outputs
normally, but it works in the
battery mode and the buzzer
beeps intermittently.
Check if the contactors and wiring terminals in the input
circuit are in good condition;
Check if the displayed input voltage amplitude or
frequency of mains on the touch screen is beyond the
allowable range of UPS;
Check if the mains input breaker is disconnected, if yes,
please close the breaker again.
After installing UPS,
connecting with power will
fuse the fuse or cause tripping
operation.
The wiring of UPS input or output is short circuit.
After starting, the touch
screen display and output are
normal. But once connecting
with load, it will stop
UPS is overload seriously or the output circuit is short-
circuit. Please reduce load to proper capacity or find the
short-circuit reason. The common reason is that the
output changeover socket short-circuit or the input short-
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