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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.
i
When being powered on, the UPS will perform
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.
9.3.2 Modification 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.
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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