LEGRAND Keor T Series - 7.5. Maintenance Bypass Decommissioning Instructions

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7.5. 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 circuit breakers 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 dierence 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 User password (1111)
11. In page Priority Mode, select Online Mode if requested, save and conrm, go back to Energy Flow
Diagram screen.
12. See “Online Mode” written on LCD.
13. Close the front door of UPS.