Start Up the UPS System from Maintenance Bypass Operation with an Inoperable Display
NOTE: If the display is operable, always go to and follow the steps on the display to start up the
UPS.
- If open, close the unit input disconnect device UIB.
- Close the static switch input disconnect device SSIB (if present).
- Close the bypass backfeed disconnect device BF2 (if present).
- Close the battery disconnect device(s).
- Press and hold the inverter ON button on the system level controller for 5 seconds. This will turn on the inverter and transfer the UPS to inverter operation (eConversion or double-conversion mode). Check that the inverter LED is green on the system level controller. See Status LED Lighting per UPS Operation Mode.
- Close the unit output disconnect device UOB.
- In a parallel system: Repeat step 1 to 6 for the other UPSs in the parallel system.
- In a parallel system: Close the system isolation disconnect device SIB (if present).
- Open the maintenance bypass disconnect device MBB.