6. Troubleshooting
--20--
Problem Possible cause Solution
The utility power is normal,
but the UPS can not turn in
line mode
Bypass breaker in “OFF”
position
Set the bypass breaker in “ON”
position.
Battery not yet been fully
charged
Keep UPS connected to utility power
persistently for more than 10 hours to
recharge the batteries again.
UPS overloaded Check the loads and remove the
non-critical equipment.
Battery discharging time
diminishes
Battery aged Replace the batteries. Please contact
the distributor to obtain the parts and
replacement service.
The “ON” button is pressed
too briefly
Press the “ON” button for more than 1
second.
The UPS is not connected
to the battery or the battery
pack voltage is too low.
Check the battery or recharge the
battery.
The UPS cannot power on
after pressing the “ON”
button
UPS fault Please contact the distributor or
service center.
When you contact the service center, please provide the following information:
l Model No. and the serial No. of the UPS;
l The date when the problem arose;
l Complete description of the problem, including the LED display, alarm warning, and power
condition and load capacity. If your UPS is a long backup time model, you may also provide the
battery information.
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