Eaton RT 1250VA User Manual page 26

5.5.4 ECO mode
LED indications on front panel on ECO mode are as following: both the
inverter green LED and bypass yellow LED are on.
When the input mains meets the input range of the ECO mode and start
the ECO function, the UPS will works on ECO mode. If input AC mains
exceeds the range of ECO several times in a row in a minute but stays
in inverting input range, UPS will work on inverting mode
automatically.
5.5.5 Fault mode
LED indications on front panel in fault mode are as following:
Fault mode(LCD interface on which the fault code display)
When UPS has fault, the fault LED lights and the buzzer beeps. UPS
will turn to fault mode when overload fault, inverting fault and
over-temperature fault happen. UPS cuts off the output and LCD display
fault codes. At the moment, you can press the mute key to make the
buzzer stop beeping temporarily to wait for maintenance. You can also
press the ON/OFF key to shut down the UPS when confirm that there is
no serious fault.
NOTE: As for corresponding information of the fault code, please refer
to Fault Code information Table in Appendix.
：
NOTICE
★The following process must be performed if UPS is connected with generator:
★First turn on generator, after it runs stably connect output power of generator to
UPS input terminal, then turn on UPS. After UPS turned on, please connect
load one-by-one.
★ It is recommended that the generator capacity is as twice as UPS rated capacity
★ You'd better not use the ECO mode when the quality of the input AC mains is
not good。
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