Isolate a Single UPS from the Parallel System

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

NOTE: Before initiating this procedure, ensure that the remaining UPS units can supply the load.
  1. Only for dual mains: Turn the static switch input breaker SSIB of the UPS to the OFF (open) position.
  2. From the home screen on the display select Control > Inverter ON/OFF > Turn Single INV OFF .
  3. Turn the unit output breaker UOB of the UPS to the OFF (open) position.
  4. Turn the unit input breaker UIB of the UPS to the OFF (open) position.
  5. Turn the battery breaker(s) BB of the UPS to the OFF (open) position.
hazard of electric shock, explosion, or arc flash
  • Wait at least 5 minutes before removing the cover of the UPS after the display has turned off to allow for the capacitors to fully discharge.
  • Always measure for hazardous voltages on all terminals before working on the UPS.
Failure to follow these instructions will result in death or serious injury.
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