Xtreme Power Conversion M90S Series User & Installation Manual page 26

M90S-4S User's Manual Uninterruptible Power Supply
3.3.6 ECO Mode
The ECO Mode is enabled through the LCD setting menu. 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.
ECO Mode Diagram
3.3.7 Shutdown Mode
When the UPS is in the off state and the utility power source is absent, the UPS will enter shutdown mode. Or
when the UPS has discharged the battery to the cut-off level, the UPS will enter 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.
Q2
Maintenance Breaker
STS
Bypass
Rectifier Inverter
Main Load
Q1 Inverter Q3
Input Breaker Relay Output Breaker
Battery Breaker
Shutdown Mode Diagram
Xtreme Power Conversion Corporation Page 26