Xtreme Power Conversion Corporation
M90 User’s Manual
Page 29
Uninterruptible Power Supply
Figure 3-6 : Bypass Mode Diagram
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 3-7 : ECO Mode Diagram
3.2.6 Shutdown Mode
When the UPS is in the off state and the utility power source is absent, the UPS will enter into shutdown mode.
Or when the UPS has discharged the battery to the cut-off level, the UPS will enter into shutdown mode as well.
When the UPS enters this mode, it is going to shut off the control power of UPS. The rectifier, charger and inverter
are all in off state.