OPERATING INSTRUCTIONS Liebert Trinergy™ Cube
User Manual - 10H52243UM60 - rev. 6 - 12/2020 Page 15
Figure 10 - Screen overview of the system in VFI mode
3.2. Single UPS – Switching to system bypass
With the system running in the selected operating mode, press the “CONTROL” button to return to
bypass mode. Enter the passcode in the pop up (see Fig. 8 - on page 14) and then press “Stop” in the
control pop up (see Fig. 9 - on page 14) to stop the inverter.
Now, return to “System in bypass” (see Fig. 7 on page 13).
Under these conditions the load is supplied by the bypass, and all automatic functions, including battery
operation, are disabled.
3.3. Parallel UPS system – Switching to automatic operating mode
With all systems in bypass (see Fig. 7 on page 13), touch the “CONTROL” button on each of the UPS units
in the parallel system and follow the same procedure as in para. 3.1 on page 13, to switch them to the
automatic operating mode.
All the UPS units will start in the VFI mode (see Fig. 9 on page 14) and remain in this condition for a
predetermined period, during which time the relevant electrical characteristics are monitored. At the end
of this period, which may last for several days depending on the conditions being measured, Trinergy™
Cube selects the operating mode that will supply the load as efficiently as possible without negatively
affecting electrical characteristics such as power factor and current distortion.
3.4. Parallel UPS system – Switching to system bypass
With the system running in the selected operating mode, press the “CONTROL” button on each UPS unit
in the parallel system and follow the same procedure as in para. 3.2 on page 15, to switch them to system
bypass (see Fig. 7 on page 13).
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