Important Notices!
Thank you for choosing LEGRAND UPS System to supply your Critical Application.
This manual contains important information about commissioning, usage and technical properties of the
UPS. It also contains safety information for operator and instructions to secure your critical load. Applying
the recommendation detailed in this manual is necessary to use UPS safely and correctly.
The manufacturer reserves the rights to change the technical specications
and design without notice.
LEGRAND reserves the rights to change the information in this document
without notice. Refer to http://ups.legrand.com/ web site to dowload last
release and translations.
Units that are labelled with a CE mark comply with the Standard: EN 62040-1 and EN 62040-2.
Read the manual completely before working on this equipment!
Keep this manual in UPS’s front cover’s pocket for easy consultation!
Reproduction, adaptation, or translation of this manual is prohibited without prior
written permission of LEGRAND Company, except as allowed under the copyright laws.
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9.5. Maintenance Bypass Decommissioning Instructions
In order to transfer the loads from Maintenance Bypass to UPS without interruption, do the following
instruction respectively;
1. Switch the auxiliary supply circuit breaker on the UPS (Q4) to “ON” position, after 30s check if fans are
running.
2. Switch the mains supply circuit breaker on the UPS (Q1) to “ON” position.
3. Switch the inrush circuit breaker on the UPS (Q6) to “ON” position.
4. LCD will be ON. See “M. Bypass Mode” written on LCD of UPS.
5. Switch the fuses on the external battery cabinet to “ON” position.
6. Touch Battery icon to see Battery / DC menu measurement. Do not close the battery circuit breakers (F5)
until the dierence between DC bus and Battery voltages decreases below 10V.
7. Switch the output circuit breaker on the UPS (Q2) to “ON” position.
8. Switch the maintenance bypass circuit breaker on the UPS (Q3) to “OFF” position.
9. Check on Energy Diagram screen that UPS is in Eco Mode operation.
10. On the display, select Menu / Command, enter password (1111).
11. In page Priority Mode, select Online Mode if requested, save and conrm, go back to Energy Flow
Diagram screen.
12. See “Online Mode” written on LCD.
13. Close the front door of UPS.
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