117 Eaton® 9390 (100–160 kVA) UPS Installation and Operation Manual 164201604—Rev F
To use the LLOOAADD OOFFFF pushbutton:
1. Press the LLOOAADD OOFFFF pushbutton.
The Load Off screen appears, providing a choice to proceed or abort the shutdown.
All power to the critical load is lost when the LOAD OFF is selected in the following step. You should use this
feature only when you want to de–energize the critical load.
2. To shut down the UPS, press LLOOAADD OOFFFF from the Load Off menu bar, and hold for three seconds. To
abort the shutdown, press CCAANNCCEELL.
When LOAD OFF is selected and held for three seconds, the input, output, and bypass backfeed
contactors open, the battery breaker or disconnect is tripped, and the power module is turned off.
DO NOT attempt to restart the system after Load Off until the cause of the shutdown has been identified and
cleared.
3. To restart the UPS after pressing the LLOOAADD OOFFFF pushbutton, follow the procedure in
9.2.1 Starting the Parallel System in Normal Mode or 9.2.2 Starting the Parallel System in Bypass Mode.
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A parallel system emergency power-off is initiated by the REPO pushbutton switch. In an emergency, you can
use this switch to control the UPM outputs. The REPO switch de–energizes the critical load and powers down
the UPMs immediately, without asking for verification.
The UPMs, including Bypass, remain off until restarted.
All power to the critical load is lost when the REPO switch is activated in the following step. You should use
this feature only when you want to de–energize the critical load.
NNOOTTEE The following instructions are for the Eaton-supplied REPO switch. If a customer-
supplied REPO switch is used, it may not activate in the same manner; refer to the
operating instructions provided with the switch.
To use the REPO switch:
1. Firmly push the red pushbutton until it locks into place. The switch latches into the activated state.
The input, output, and bypass backfeed contactors open, the battery breaker or disconnect is tripped, and
the power module is turned off immediately, without asking for verification.
DO NOT attempt to restart the system after Load Off until the cause of the shutdown has been identified and
cleared.
2. To deactivate the REPO switch, insert the supplied key and rotate clockwise until the red pushbutton
releases. To remove the key, rotate the key back to the vertical position.
UPS Operating Instructions
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