be less than 3, otherwise, the UPS will remain in Bypass mode for 1
hour before it transfers back to Normal mode.
3.3.2 Transfer to Battery Mode in the Event of Mains Failure
In the event of mains failure, the UPS transfers to Battery mode.
when the battery is completely discharged, the UPS automatically
shuts down. When the mains restores, the UPS automatically turns
on and operates in Normal mode. This function is designed for
unattended UPS. If the UPS is manually shut down in Battery mode,
it can only be turned on to inverter manually when the mains
restores.
3.3.3 Transfer to Bypass Mode in the Event of Overtemperature
High ambient temperature and poor ventilation may result in
overtemperature inside UPS. In the event of internal
overtemperature, the UPS transfers to Bypass mode, the fault
indicator shines red, the 3rd fault locating indicator from the left
flashes, and the UPS gives audible alarm. In such case, cut off the
input AC mains (by pulling off the input plug or switching off the
circuit breaker), remove any substances blocking ventilation, or
widen the distance from wall. After the UPS cools down, supply it
with AC mains and turn it on.
3.3.4 Output Short-circuit Protection
In the event of load short-circuit, the UPS stops output, the fault
indicator shines red, the yellow fault locating indicator flashes, and
the UPS gives alarm. In such case, disconnect the concerned load,
and cut off the input power of the UPS. 10 minutes later, the UPS
automatically shuts down (or manually shut down the UPS 10
seconds later by pressing the OFF button). After removing the
Chapter 3 Operation 31
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