PROLiNK Master III Series User Manual page 27

3-2.4 Bypass Mode
Upon connecting to utility input power, the UPS is in Bypass mode before UPS is turned on (if BYPASS enable
setting is Enabled), and charger function will be active when battery is present.
After UPS has been turned on, if the UPS encounters abnormal situations (over-temperature, overload , and etc.),
the static transfer switch will perform as a transference of the load from the inverter to the bypass source with no
interruption. If the transference is caused by a recoverable reason, the UPS will turn back to line mode when
abnormal situation is solved.
3-2.5 ECO Mode
The ECO Mode is enabled through the setting menu of LCD panel. In ECO mode, the load is powered by bypass
when the bypass voltage and frequency are within the acceptable ranges. If the bypass is out of range, the UPS
will transfer the power source of load from bypass to inverter. In order to shorten the transfer time, the rectifier
and inverter are working when the UPS is in ECO mode.
Figure 3-6 : Bypass Mode Diagram
Figure 3-7 : ECO Mode Diagram
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