INFOSEC Mod5T User Manual page 33

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.
Figure 3-8 : Shutdown Mode Diagram
3.2.7 Maintenance bypass Mode
A manual bypass switch is available to ensure continuity of supply to the critical load when the UPS
becomes unavailable e.g. during a maintenance procedure. Before entering the maintenance
bypass mode, make sure the bypass power source is normal.
Figure 3-9 : Maintenance Bypass Mode Diagram
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