LBS DRAGON POWER PLUS 15 User Manual page 12

1.2.2.4 Maintenance Mode (Manual Bypass)
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. The Maintenance mode structure is
shown in Fig.1-7.
Figure 1-7 Maintenance mode operation diagram
Danger
During Maintenance mode, dangerous voltages are present on the terminal of input, output and
neutral, even with all the modules and the LCD turned off.
1.2.2.5 ECO Mode
To improve system efficiency, UPS system works in Bypass Mode at normal time, and the inverter
is standby, when the utility from the bypass fails, the UPS will transfer to Battery Mode and the
inverter powers the load. The ECO mode structure is shown in Fig.2-8.
Figure 1-8 ECO Mode operation diagram
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