Transfer a Single UPS from Normal Mode to Maintenance Bypass Mode

  1. From the home screen on the display select Control > Inverter ON/OFF > Turn Single INV OFF.
  2. Turn the maintenance bypass breaker MBB to the ON (closed) position.

    The load is now supplied via the maintenance bypass breaker.

  3. Turn the battery breaker(s) BB to the OFF (open) position.
  4. Turn the unit input breaker UIB to the OFF (open) position.
  5. Turn the static switch input breaker SSIB to the OFF (open) position.
  6. Turn the unit output breaker UOB 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.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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