990-55222B-001

Isolate a Single UPS in the Parallel System

Use this procedure to shut down one UPS in a running parallel system.

NOTE: Ensure that the remaining UPSs can supply the load before starting this procedure.
NOTE: Only operate a disconnect device when the associated disconnect device indicator lamp is illuminated.
  1. On this UPS, tap Control > Guided sequences > Shut down a UPS in a parallel system, and follow the steps which appear on the display.
  2. Generic shutdown procedure:
    NOTE: The following are generic shutdown procedures. Always follow the steps of the Guided sequences which are specific to your system
    1. On this UPS, select Control > Inverter > Inverter off or press and hold the inverter OFF button on the system level controller for 5 seconds.
    2. Open the unit output disconnect device UOB for this UPS.
    3. Open the static switch input disconnect device SSIB (if present) for this UPS.
    4. Open the battery disconnect device(s) for this UPS.
    5. Open the unit input disconnect device UIB for this UPS.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

Was this helpful?