990-5995E-001

Transfer a Parallel System from Normal Mode to Maintenance Bypass Mode

DANGER
hazard of electric shock, explosion, or arc flash
To completely isolate the UPSs, all upstream disconnection devices (MIB, BIB, and SIB) must be in the OFF (open) position.
Failure to follow these instructions will result in death or serious injury.
  1. From the home screen on the display select Control > Inverter OFF > Parallel OFF .

    All UPSs will turn to static bypass mode.

  2. Turn the Ext. MBB to the ON (closed) position.

    The load is now supplied via the external maintenance bypass.

  3. Turn the BBs of all UPSs to the OFF (open) position.
  4. Turn the MIBs and BIBs of all UPSs to the OFF (open) position if available.
  5. Turn the UIBs and the SSIBs of all UPSs to the OFF (open) position.
  6. Turn the UOBs of all UPSs and the SIB to OFF (open) position.
DANGER
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.

Was this helpful?