Critical PowerModifications reserved Page 68/91GE_UPS_USM_TLE_SUL_M16_M50_2bU_V010.docx User Manual TLE Series 160 - 500 UL S2B2. Close “Q1 - UPS Output switch” (Pos. I).• Rectifier starts automatically.LED 1 (Rectifier) blinking, indicates Soft-start.• At the end of Rectifier Soft-start the LED 1 (Rectifier) remains lit.NOTE !Ensure the LED 1 (Rectifier) is lit before carrying out this procedure.It indicates that the DC-link 1 and DC-link 2 has reached 400Vdc (see screen MEASURES /Rectifier)!Before performing the next procedure (4) make sure that the LED 3(Booster/Battery charger) is lit.Attention: check the right DC polarities on both side of the switch/fuse holder!3. Connect the Battery to the UPS by closing the “External Battery Protections” and close, ifpresent, the “CB3 – External Battery switch” (option).4. Insert the Inverter performing the command “Inverter ON".Before performing this procedure make sure that the LED 1 (Rectifier) and LED 3 (Booster/Batterycharger) are lit.Perform the “Inverter ON” command from the screen:Commands 1 / Inverter / ON.• Soft-start of Inverter indicated with blinking LED 2 (Inverter).• At the end of Soft-start the LED 2 (Inverter) remains lit.• Load is now supplied from Inverter.• LED ALARM turns Off and the LED LOAD PROTECTED must be lit.The Synoptic Diagram must display the status“LOAD SUPPLIED BY INVERTER”.END OF PROCEDURENOTE !The Battery must be charged for at least 10 hours, in order to ensure the full backupruntime in case of a Utility Failure.