10.Now switch on the inverters of each UPS. To do this, press and hold the UPS ON switch one by one for about 2 seconds.

When being powered on, the UPS will perform i self-diagnosis, the Load/Battery level LEDs will be turned on and then off one after another in ascending order. After synchronising all inverters successfully the LED “Inverter” will go on after some seconds on each UPS, with the UPS in parallel normal mode. The loads bus-bar

is supplied by the UPS.

Protect the central external manual bypass switch against accidental activation. Never activate the switch when the UPS is in inverter mode.

11.When all displays are lit as described, switch on your loads one after the other. Note the maximum permitted UPS load when doing this. Also keep in mind the spare power, if an active redundancy is required.

9.3.2Modification in parallel compound

For adding another UPS to the parallel compound or for removing a UPS from the parallel compound, the UPS system has to be brought into the Bypass operation mode.

i

Load supplied through mains!

(No UPS protection during these steps).

 

First switch the inverter of all the UPS system one by one off (press the “OFF“ switch). All UPS systems are working in the SBS / bypass mode. Check the state on all displays. Activate the integrated bypass (Pos. 2, page 26) on the back of the UPS. For this remove the four screws of the cover on the rear.

Bring the mains input circuit breaker of each UPS into the “OFF” position. With the central external manual bypass the

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