Insert the battery fuses into the battery disconnect switches on the Trimod HE UPS, if fitted to the model, and inside the external battery cabinets (if fitted). Close the battery disconnect switches of the UPS and external battery cabinets FB+ and FB- (if present). Supply power to the UPS and close the mains input S3 and bypass input S5 disconnect switches (ON position) of the UPS. Press the ON/OFF button to switch on the UPS. When the display shows the text " " to confirm UPS power on", press the ENTER button.