990-6287A-001

Transfer a Parallel System from Maintenance Bypass Mode to Normal Mode

  1. Check that:
    1. All UPS breakers (unit input breakers UIB, static switch input breakers SSIB, and unit output breakers UOB) and the system isolation breaker SIB are in the OFF (open) position.
    2. The battery breakers BB are in the OFF (open) position.
  2. Turn the system isolation breaker SIB and the unit output breakers UOB of all UPSs to the ON (closed) position.
  3. Turn the static switch input breakers SSIB of all UPSs to the ON (closed) position.

    Wait approximately 60 seconds until the bypass LED turns yellow.

  4. Turn the maintenance bypass breaker MBB to the OFF (open) position.
  5. Turn the unit input breakers UIB of all UPSs to the ON (closed) position.

    When the inverter LED turns steady green, the parallel system automatically transfers from static bypass to normal mode.

  6. Turn the battery breakers of all UPSs to the ON (closed) position.

    The LEDs on the user interfaces show as follows:

    The parallel system is now in normal mode.

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