Enter the function setting page, turn to output voltage setting
page[OPU], you may choose the following output voltage:
208: presents output voltage is 208Vac
220: presents output voltage is 220Vac (Default)
230: presents output voltage is 230Vac
240: presents output voltage is 240Vac
Set output voltage to 230VAC
4.7.2 Expert mode settings (EP)
If the expert mode (EP) is set to ON, the setting is including
battery number setting (PCS), emergency power off setting
(EPO), battery end of discharge voltage setting (EOd), ECO
setting (ECO), and battery charging current setting (CHG).
Expert Mode is OFF by default. Once set to ON, the UPS should
be powering on again to take effect.
Set expert mode (EP) to ON