User manual

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Site fail Phase and neutral
conductor at input
of UPS system
are reversed
Rotate mains power socket
by 180° or connect UPS
system.
EPO active EPO function is
enabled
Turn off the EPO switch.
Bus fault UPS internal fault Notify dealer
Inverter fault UPS internal fault Notify dealer
Over temperature
fault
Over temperature Check the ventilation of the
UPS, check the ambient
temperature and ventilation.
Inverter short Output short
circuit
Remove all the loads. Turn
off the UPS. Check whether
the output of UPS and loads
is short circuit. Make sure the
short circuit is removed, and
the UPS has no internal
faults before turning on
again.
Bus short UPS internal fault Notify dealer
Please have the following information at hand before calling the
After-Sales Service Department:
1. Model number, serial number
2. Date on which the problem occurred
3. LCD/LED display status, Buzzer alarm status
4. Utility power condition, load type and capacity, environment
temperature, ventilation condition
5. The information (battery capacity, quantity) of external battery pack
if the UPS is “S” model
6. Other information for complete description of the problem